[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Iturrizaga Bonelli, Eduardo"]
[Black "Remicio Jhon"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2663"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,56,22,26,73,-4,31,43,100,102,96,95,114,98,110,96,110,97,135,141,169,133,203,187,243,242,269,273,277,290,277,277,288,286,275,260,264,257,268,264,277,266,388,383,354,268,361]} 1. Nf3 Nf6 2. c4 c6 3. g3 d5 4. Bg2 e6 5. O-O Nbd7 6. d4 dxc4 7. a4 Bb4 {E04: Open Catalan: 5 Nf3} (7... a5 8. Qc2 b5 9. axb5 cxb5 10. Ne5 Nd5 11. Nc3 Nxe5 12. dxe5 Nb4 13. Qe4 Rb8 14. Rd1 Qc7 15. Bg5 Bd7 {1-0 (26) Perez Ponsa,F (2586)-Flores,D (2590) Villa Martelli 2016}) 8. Nfd2 (8. Nbd2 $16) 8... O-O $146 ({Predecessor:} 8... e5 9. Nxc4 exd4 10. Qxd4 O-O 11. Bf4 Nc5 12. Nd6 a5 13. Qe3 Be6 14. Nc3 Bb3 15. Rfc1 {1-0 (51) Chekletsov,I (2113)-Rydl,J (2427) Pardubice 2015}) 9. Nxc4 Re8 (9... Qe7 $14) 10. a5 $16 Qe7 11. Qb3 Nb8 12. Nc3 Na6 13. Rd1 Rd8 14. Na2 Bd7 15. e4 Be8 16. Bf4 Rac8 (16... h6 $16 17. Bf3 Rd7) 17. Rac1 h6 (17... Nd5 {keeps fighting.} 18. exd5 cxd5) 18. Nxb4 $18 Qxb4 19. Qxb4 Nxb4 20. Nd6 Rc7 21. Nxe8 Nxe8 22. Bxc7 Nxc7 23. Bf1 f5 24. f3 Kf7 25. Kf2 g5 26. Rc3 b6 (26... Rd7 {was necessary.} 27. Rc4 Nba6) 27. axb6 axb6 28. Be2 Ke8 {Precision: White = 86%, Black = 22%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Iturrizaga Bonelli, Eduardo"]
[Black "Remicio Duque, John H"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2663"]
[BlackElo "2110"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,56,21,74,-5,34,27,99,103,102,100,102,108,109,114,110,104,144,146,157,147,200,185,240,242,267,267,269,269,272,266,269,263,272,265,272,270,272,264,270,280,374,359,331,250,353]} 1. Nf3 Nf6 2. c4 c6 3. g3 d5 4. Bg2 e6 5. O-O Nbd7 6. d4 dxc4 7. a4 Bb4 {LiveBook: 8 Games. E04: Open Catalan: 5 Nf3} (7... b6 $11) (7... a5 8. Qc2 b5 9. axb5 cxb5 10. Ne5 Nd5 11. Nc3 Nxe5 12. dxe5 Nb4 13. Qe4 Rb8 14. Rd1 Qc7 15. Bg5 Bd7 {1-0 (26) Perez Ponsa,F (2586)-Flores,D (2590) Villa Martelli 2016}) 8. Nfd2 (8. Nbd2 $16) 8... O-O $146 ({Predecessor:} 8... e5 9. Nxc4 exd4 10. Qxd4 O-O 11. Bf4 Nc5 12. Nd6 a5 13. Qe3 Be6 14. Nc3 Bb3 15. Rfc1 {1-0 (51) Chekletsov,I (2113)-Rydl,J (2427) Pardubice 2015}) 9. Nxc4 Re8 (9... Qe7 $11) 10. a5 $16 Qe7 11. Qb3 Nb8 12. Nc3 Na6 13. Rd1 Rd8 14. Na2 Bd7 15. e4 Be8 16. Bf4 Rac8 (16... h6 $16 17. Nxb4 Nxb4) 17. Rac1 h6 (17... Nd5 {was worth a try.}) 18. Nxb4 $18 Qxb4 19. Qxb4 Nxb4 20. Nd6 Rc7 21. Nxe8 Nxe8 22. Bxc7 Nxc7 23. Bf1 f5 24. f3 Kf7 25. Kf2 g5 26. Rc3 b6 27. axb6 axb6 28. Be2 Ke8 {Precision: White = 86%, Black = 32%.} (28... b5 $142 29. Rcc1 Kg7) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Cordova, Emilio"]
[Black "Ramirez Gonzalez, Mauricio"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "2651"]
[BlackElo "2108"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,59,65,54,47,45,77,81,106,65,84,74,82,91,122,109,135,135,142,148,150,141,150,141,241,268,488,416,436,442,831,810,815,797,1037,1013,2738,2679,2151,964]} 1. d4 e6 2. c4 d5 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 c6 7. Qc2 Nbd7 {[%cal Bb8d7,Bd7f8,Bf8e6][%mdl 32]} 8. Bd3 Nf8 9. Nf3 Ne6 10. Bh4 g6 11. O-O Ng7 12. b4 O-O {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2)} (12... a6 13. Bxf6 Bxf6 14. a4 O-O 15. b5 a5 16. bxc6 bxc6 17. Ne2 Bd7 18. Rab1 Rb8 19. Nf4 Qe7 20. Be2 {½-½ (59) Harikrishna,P (2679)-Grachev,B (2610) Dagomys 2008}) 13. b5 cxb5 14. Nxb5 Bf5 $146 {White is better.} ({Predecessor:} 14... Be6 15. Rfc1 Nfe8 16. Bxe7 Qxe7 17. Qc5 Qxc5 18. dxc5 f6 19. Rab1 Rf7 20. Nfd4 {½-½ (82) Geller,E-Barcza,G Stockholm 1962}) 15. Bxf5 Nxf5 16. Bxf6 $1 Bxf6 17. Qb3 Qa5 18. Rac1 Rac8 19. Qxd5 Rxc1 20. Rxc1 {[%cal Bf1c1,Bc1c7,Bc7c8][%mdl 32]} a6 21. Nc3 Qa3 {[#]} 22. Ne2 $1 Re8 (22... Rd8 $16 {is a better defense.} 23. Qxb7 Qxa2) 23. Rc7 $18 Re7 $2 (23... Ne7 {was necessary.} 24. Qxb7 Qxa2) 24. Rc8+ Kg7 25. Qd8 {[%csl Gc8][%cal Rd8f8] White is clearly winning.} Rxe3 (25... Kh6 $142 26. h3 Re6) 26. Qg8+ Kh6 27. fxe3 Ne7 28. Qxf7 {[#] White wants to mate with Qf8+.} Qxe3+ 29. Kf1 Nxc8 30. Qxf6 {Precision: White = 97%, Black = 21%.} (30. Qf8+ $142 Bg7 31. Qxc8) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Kovalyov, Anton"]
[Black "Chirivi C, Angie Lizeth"]
[Result "1-0"]
[ECO "D90"]
[WhiteElo "2643"]
[BlackElo "2105"]
[Annotator "TA"]
[PlyCount "123"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,123,35,35,47,52,104,87,87,94,93,99,79,80,140,135,127,102,91,64,66,61,44,-3,16,0,0,-27,6,0,43,-6,-3,-38,-32,-32,16,33,56,58,69,33,56,18,91,84,86,47,48,57,98,93,132,81,157,148,185,22,17,0,0,0,33,8,124,138,158,135,155,162,210,209,209,206,198,165,192,186,185,143,227,254,246,194,497,516,610,558,1142,1041,987,960,12840,12840,12841,12841,12841,12837,29988,29989,29989,29990,29990,29991,29991,29992,29992,12849,12849,12850]} 1. c4 Nf6 2. Nf3 g6 3. Nc3 d5 4. cxd5 Nxd5 5. Qb3 Nb6 6. d4 Bg7 7. Bf4 O-O 8. Rd1 c6 9. e4 Be6 {D90: Grünfeld: 4 Nf3 Bg7 sidelines} 10. Qc2 Bc4 $146 (10... Bg4 $14) ({Predecessor:} 10... Bg4 11. Be2 Bxf3 12. Bxf3 Bxd4 13. Ne2 c5 14. b4 Qc8 15. Nxd4 cxd4 16. Qb3 Qc3+ 17. Qxc3 dxc3 {½-½ (37) Can,E (2555)-Anwuli,D (2365) Dubai 2016}) 11. Bxc4 $16 Nxc4 {White is better.} 12. Qe2 Nb6 13. h4 {[%cal Bh2h4,Bh4h5][%mdl 32]} N8d7 14. e5 e6 (14... Nd5 $142 15. Nxd5 cxd5) 15. h5 Nd5 16. Nxd5 cxd5 17. Ng5 {[%cal Bf3g5,Bg5h3,Bh3f2][%mdl 32]} h6 $1 {[%cal Rh6g5]} 18. Nh3 g5 19. Bd2 (19. Nxg5 $5 Qa5+ 20. Kf1 $14) 19... f5 20. exf6 Qxf6 21. f4 g4 22. Qxg4 Qxd4 (22... Qf5 $5 {[%cal Rf5g4]} 23. Nf2 Rac8 $11) 23. Nf2 Rae8 24. O-O {[#] Strongly threatening Bc3.} Qxb2 25. Rfe1 Nf6 26. Qg6 Ne4 27. Nxe4 dxe4 28. Be3 $40 {[%mdl 128] White attacks.} (28. Bc1 $5 {[%cal Rc1b2]} Qf6 29. Qxe4 $14 (29. Rxe4 Qxg6 30. hxg6 Rf6 $11)) 28... Qf6 29. Rd7 Re7 (29... Qxg6 $11 30. hxg6 b5) 30. Rxe7 Qxe7 31. Rc1 Kh8 32. Qxe4 b6 33. g3 Qd7 34. Kg2 ({White should try} 34. g4) 34... Rg8 (34... Qb5 $142) 35. Rc6 Qd1 36. Qf3 $2 (36. Rxe6 $18 {Hoping for Bd4!} Qe2+ 37. Bf2 Qxa2 38. Rd6 (38. Re7 a5 $18)) 36... Qa4 $1 $11 37. Rc7 (37. a3 $5) 37... Qxa2+ 38. Kh3 Qa1 39. Re7 (39. Rc6 $5 {[%cal Rc6e6]}) 39... Qa5 (39... Qa2 $11 {remains equal.}) 40. g4 $16 (40. Rxe6 $6 Qf5+ 41. Qg4 Qd5 $11) 40... Qa2 41. Qe4 Qe2 42. Rxe6 Bf6 43. Qg2 Qd3 44. Qf3 ({Don't play} 44. Rxf6 $6 Qxe3+ 45. Qg3 Qxg3+ 46. Kxg3 Kh7 $14) 44... Rf8 45. Kg2 Qc2+ 46. Kg3 {[#] Rxf6! is the strong threat.} Qc3 47. Qd1 a5 (47... b5 $16 {was called for.}) 48. Qd2 $18 Qxd2 49. Bxd2 {[%mdl 4096] Endgame KRB-KRB} Bd4 $2 (49... Kg7 {is more resistant.} 50. Rxb6 Ra8) 50. Rxh6+ Kg7 51. Rd6 Bc5 52. Bc3+ Kf7 53. Rf6+ Ke8 54. Rxf8+ Bxf8 {KB-KB} 55. g5 {[%cal Bg4g5,Bg5g6][%mdl 32]} Kf7 56. Kg4 Bg7 57. g6+ Kg8 58. Bxg7 Kxg7 59. Kg5 a4 60. h6+ Kg8 61. Kf6 (61. h7+ $142 Kg7 62. f5 Kf8 63. h8=Q+ Ke7 64. g7 Kd6 65. g8=Q Kc6 66. Qe8+ Kd5 67. Qhe5+ Kc4 68. Q8b5#) 61... a3 62. h7+ {Precision: White = 54%, Black = 28%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Delgado Ramirez, Neuris"]
[Black "Salcedo, Pablo Esteban"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2613"]
[BlackElo "2103"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,81,23,77,58,55,63,76,23,86,66,123,91,98,97,134,134,181,52,64,43,45,58,102,95,102,91,104,99,122,98,130,132,141,138,145,137,156,149,168,162,179,184,182,178,185,191,187,180,176,195,338,343,422,421,417,416,391,375,419,426,1070,1083,1078,994,1047,1041,1018,953,954,941,873,745,1709,1712]} 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Nc6 5. d4 e5 ({Avoid the trap} 5... Nxe4 $2 6. d5 $18) (5... cxd4 $11 6. cxd4 Nxe4) 6. dxe5 {B50: Sicilian: 2...d6, Miscellaneous} (6. d5 Ne7 7. O-O Ng6 8. Re1 Be7 9. Nfd2 O-O 10. Bf1 Ne8 11. Nc4 f5 12. Nbd2 Bg5 13. a4 Nf6 {1-0 (59) Sivokho,S (2483)-Frolov,A (2297) St Petersburg 2004}) 6... dxe5 7. Qxd8+ Kxd8 8. Bb5 $146 ({Better is} 8. Nbd2 $16) ({Predecessor:} 8. Bg5 Be7 9. Nbd2 Ng4 10. Nc4 Bxg5 11. Nxg5 Ke7 12. Bxg4 Bxg4 13. Ne3 Be6 14. Nxe6 Kxe6 {1-0 (48) Xu,X (2101)-Nanjo,R (2321) Bangkok 2014}) 8... Bg4 (8... Bd6 $11) 9. Nbd2 Bd6 (9... Nd7 $14) 10. Bxc6 bxc6 11. Nc4 Kc7 12. Nfxe5 Be6 13. f3 (13. Nxd6 $18 Kxd6 14. Bf4) 13... Nd7 $1 $14 14. Nxd6 Nxe5 15. Nf5 Nd3+ 16. Ke2 Nxc1+ 17. Rhxc1 Bxf5 18. exf5 $16 {[%mdl 4096] Endgame KRR-KRR} Rhe8+ 19. Kf2 Rab8 20. Rc2 Re5 21. g4 Rbe8 22. Rd1 f6 23. Rd3 R8e7 24. Rcd2 Re1 25. Rd8 Rh1 26. Kg3 Rg1+ 27. Kf4 h6 28. R8d3 Rge1 29. Kg3 R1e2 (29... Rf1 {is a better defense.} 30. c4 Rg1+ 31. Kf4 Ra1) 30. Rd7+ $18 Kb6 31. Rxe2 Rxd7 {KR-KR} 32. Kh4 Kb5 33. Kh5 Kc4 34. Re3 a5 (34... Kb5 $142 35. Kg6 Rb7) 35. b3+ Kb5 36. a4+ Kb6 37. c4 Kc7 38. Kg6 Kd8 39. h4 Rb7 40. f4 Rd7 41. g5 {Precision: White = 73%, Black = 29%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Pichot, Alan"]
[Black "Saltos Velez, Adrian"]
[Result "1-0"]
[ECO "B27"]
[WhiteElo "2577"]
[BlackElo "2099"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,47,50,50,128,122,110,123,126,66,125,90,173,181,220,218,295,291,303,299,356,318,350,311,300,302,547,563,445,437,443,454,444,435,408,406,417,353]} 1. e4 c5 2. Nf3 g6 3. d4 Bg7 4. dxc5 Qa5+ 5. c3 Qxc5 6. Na3 {B27: Sicilian: 2 Nf3, unusual Black 2nd moves} d6 (6... Nf6 7. Be3 Qa5 8. Nc4 Qc7 9. e5 Ng4 10. Bf4 b5 11. Ne3 Nxe3 12. fxe3 e6 13. Bxb5 Qb6 {½-½ (32) Nepomniachtchi,I (2705)-Guseinov,G (2649) Ashdod 2015}) 7. Nb5 {LiveBook: 33 Games. Hoping for Be3.} b6 (7... a6 $14 8. Be3 Qc6) 8. Be3 $16 {White is better.} Qc6 9. Qb3 Be6 10. Qb4 $146 (10. Qa4 $16 Bd7 11. Qc4) ({Predecessor:} 10. Qa4 Kf8 11. Nfd4 Bxd4 12. Qxd4 Nf6 13. f3 h5 {1-0 (45) Czarnota,P (2530)-Goslawski,M (1990) Krakow 2009}) 10... Qb7 (10... Qc8 $14) 11. Ng5 {Strongly threatening Qa4.} ({Reject} 11. Qxd6 $6 exd6 12. Nxd6+ Kd8 $11) 11... Nc6 (11... a6 $16 {was called for.}) 12. Qxd6 $1 $18 exd6 13. Nxd6+ Kd7 14. Nxb7 Kc7 15. O-O-O Bxa2 16. Nd6 Nh6 17. Bc4 Bxc4 18. Nxc4 b5 $2 {[#]} (18... Ne5 {was necessary.}) 19. Bf4+ Kb7 20. Nd6+ Ka6 21. Kc2 Be5 22. Ra1+ Kb6 23. Be3+ Kc7 24. Ndxf7 {Precision: White = 85%, Black = 36%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Peralta, Fernando"]
[Black "Benavides Montenegro, Maicol"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2569"]
[BlackElo "2090"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,79,0,26,32,73,65,65,64,54,24,33,25,63,52,97,109,179,186,202,183,176,142,183,191,164,81,66,60,96,102,104,104,153,159,173,163,395,383,365,268,311,312,442,438,618,542,595,587,12837,12837,12840,12840,12841,12841,12841,12841,29980,29979,12845,12845]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. Be3 c5 7. Nf3 cxd4 8. Nxd4 Nc6 9. Be2 Bd7 10. O-O Rc8 11. Nb3 Ne5 12. Nd2 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0} (12. c5 Bc6 13. Qb1 dxc5 14. Nxc5 b6 15. Nb3 Bb7 16. Nd2 Nc6 17. Rd1 Qc7 18. a3 Rfd8 19. Qa2 e6 {½-½ (65) Cramling,P (2488)-Arakhamia Grant,K (2435) Catalan Bay 2004}) 12... Bc6 13. b4 $146 ({But not} 13. Bxa7 b6 $15) ({Predecessor:} 13. f4 Ned7 14. Bf3 b6 15. Qe2 Re8 16. g4 h6 {1-0 (34) Faraj,Y (2252)-Elbaba,E (2185) Beirut 2009}) 13... b6 14. Rc1 {White is slightly better.} Ba8 15. f4 Nc6 16. a3 Nd7 17. Nb3 $36 {[%mdl 2048] White is pushing.} f5 18. Bf3 Nf6 (18... Qe8 $16) 19. exf5 $18 gxf5 20. b5 Na5 21. Bxa8 Rxa8 22. Nxa5 bxa5 23. Nd5 (23. Qd3 $18) 23... Ne4 $16 24. Bd4 Bxd4+ 25. Qxd4 e6 {[#]} 26. Nc3 $1 Qf6 {[#]} 27. Rfd1 $1 Nxc3 28. Rxc3 {aiming for Qxf6.} Rad8 $2 (28... Qxd4+ {was worth a try.} 29. Rxd4 Rad8) 29. Rg3+ $18 Kh8 30. Qxf6+ Rxf6 {[%mdl 4096] Endgame KRR-KRR} 31. Rgd3 Rc8 (31... d5 {is a better defense.} 32. cxd5 exd5 33. Rxd5 Rxd5 34. Rxd5 a4 35. Rd8+ Kg7 36. Rd7+ Rf7) 32. Rxd6 Rxc4 (32... Rf7 $142 33. Rc1 (33. Rxe6 Rxc4 34. Ra6 Kg7 $16) 33... Rb7) 33. Rd7 Kg8 {If only Black now had time for ...Rf7....} 34. Rxa7 Rf7 35. b6 {[%cal Bb5b6,Bb6b7][%mdl 32]} Rc8 36. Rdd7 Rxd7 37. Rxd7 Rc1+ 38. Kh2 Rc8 39. b7 {[%cal Rb7c8]} Rb8 40. Rc7 {Precision: White = 82%, Black = 28%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Cruz, Cristhian"]
[Black "Castano, Jhon Edison"]
[Result "*"]
[ECO "D85"]
[WhiteElo "2558"]
[BlackElo "2088"]
[Annotator "TA"]
[PlyCount "38"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,33,14,15,10,15,0,43,31,22,27]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Rc1 Qa5 9. Qd2 O-O 10. Nf3 Rd8 11. d5 e6 12. Be2 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3} (12. d6 Qa4 13. h4 Qxe4 14. h5 Qd5 15. Qc2 Rxd6 16. hxg6 hxg6 17. Ng5 Nc6 18. Ne4 Rd7 19. Bg5 Bxc3+ 20. Qxc3 Qxe4+ {0-1 (40) Harikrishna,P (2750)-Svidler,P (2755) Moscow 2017}) 12... exd5 13. exd5 Nc6 {LiveBook: 4 Games} 14. Bg5 f6 15. Bf4 Be6 (15... c4 $5) 16. c4 {[#] Strongly threatening Qxa5.} Nb4 $1 17. O-O {Predecessor:} Bf7 $146 18. Ra1 Qa3 19. Bd1 Re8 {½-½ (58) Sohal,T (2331)-Wu,R (2106) Victoria 2015} *

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Cruz, Cristhian"]
[Black "Castano, Jhon Edison"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2558"]
[BlackElo "2088"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,67,0,16,12,11,12,29,32,37,40,120,55,42,35,89,86,71,30,71,71,65,81,66,64,81,39,56,45,50,19,22,18,25,21,16,14,27,18,114,121,161,145,225,137]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Rc1 Qa5 9. Qd2 O-O 10. Nf3 Rd8 11. d5 e6 12. Be2 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3} (12. d6 Qa4 13. h4 Qxe4 14. h5 Qd5 15. Qc2 Rxd6 16. hxg6 hxg6 17. Ng5 Nc6 18. Ne4 Rd7 19. Bg5 Bxc3+ 20. Qxc3 Qxe4+ {0-1 (40) Harikrishna,P (2750)-Svidler,P (2755) Moscow 2017}) 12... exd5 13. exd5 Nc6 {LiveBook: 4 Games} 14. Bg5 {The position is equal.} f6 15. Bf4 Be6 (15... c4 $5) 16. c4 Nb4 $1 17. O-O Bf5 $146 {[#]} (17... Bf7 $14) ({Predecessor:} 17... Bf7 18. Ra1 Qa3 19. Bd1 Re8 {½-½ (58) Sohal,T (2331)-Wu,R (2106) Victoria 2015}) 18. Ra1 ({Better is} 18. a3 $1 $16 {[%cal Ra3b4]} Qxa3 19. Ra1) 18... Qa3 $14 19. Rfc1 g5 ({Black should try} 19... Re8 $14) 20. Be3 $16 b6 21. Ne1 (21. Rc3 $5 {[%cal Rc3a3]} Qa4 22. h3 $14) 21... Rd7 22. Rc3 Qa4 23. Bd1 {[%cal Be2d1,Bd1b3,Bb3a4,Ba4c6][%mdl 32]} Qa6 24. Qb2 {Strongly threatening a3.} Rad8 25. Bb3 {Black must now prevent a3.} Qc8 26. a3 Na6 27. Rd1 Nc7 28. a4 Ne8 29. a5 $36 {[%mdl 2048] White has the initiative.} Nd6 30. Ba4 Rb7 31. axb6 Rxb6 (31... axb6 $11 {remains equal.} 32. Bc6 Rb8) 32. Qe2 Rb4 {[#]} 33. Bc6 $1 Nb7 (33... Ne4 $16 34. Ra3 Bf8) 34. Rcc1 {Precision: White = 57%, Black = 38%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Bacallao Alonso, Yusnel"]
[Black "Gonzalez, Eleicer"]
[Result "1-0"]
[ECO "A53"]
[WhiteElo "2554"]
[BlackElo "2078"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,101,32,35,44,75,50,57,45,59,39,50,35,45,0,0,-9,0,-11,-8,-14,9,0,41,26,27,0,19,21,20,25,32,27,47,47,47,43,45,35,41,34,50,11,23,0,0,0,0,0,0,0,0,0,0,0,93,-12,-12,-16,-13,-18,-10,-31,-14,-25,-23,-35,-8,-8,-8,-102,502,439,812,774,29987,29988,29988,29989,29989,29990,29990,29991,29991,29969,29969,29970,4933,29962,29966,29966,29967,29968,29968,29940]} 1. Nf3 Nf6 2. c4 d6 3. d4 Bg4 4. Qb3 b6 (4... Qc8 5. Nc3 g6 6. h3 Bxf3 7. exf3 Bg7 8. Be2 O-O 9. Be3 e5 10. dxe5 dxe5 11. f4 Nc6 12. fxe5 Nxe5 13. O-O {½-½ (27) Donchenko,A (2569)-Krasenkow,M (2610) Drancy 2016}) 5. g3 g6 $146 ({Predecessor:} 5... e6 6. Bg2 Bxf3 7. Bxf3 d5 8. Nc3 c6 9. cxd5 exd5 10. O-O Be7 11. Bg5 Nbd7 12. e4 dxe4 13. Nxe4 {1-0 (41) Sorokin,A (2085)-Nuretdinov,A (1881) Porto Carras 2013}) 6. Bg2 {A53: Old Indian Defence without Nf3} c6 7. O-O (7. h3 $5 {[%cal Rh3g4]} Bc8 8. O-O $16) 7... Bg7 8. Nc3 {White is slightly better.} O-O 9. e4 Nbd7 10. Be3 e5 11. d5 ({White should try} 11. Rad1 $14) 11... cxd5 $11 12. cxd5 Nc5 13. Bxc5 bxc5 14. Nd2 Rb8 15. Qc2 Qd7 16. Nc4 Qc7 17. Rfe1 Rb4 18. Bf1 Bd7 19. a3 Rb7 20. a4 Rfb8 {[#]} 21. Nb5 $1 {[%mdl 512]} Bxb5 22. axb5 Rxb5 23. Ra6 Bf8 24. Rea1 {[%mdl 1024] White has compensation.} R8b7 25. Bh3 Ne8 26. R1a2 Qb8 27. Rc6 Nc7 28. Bf1 Rb4 29. Nxd6 Rxb2 30. Rxb2 Rxb2 31. Qc3 Rb6 (31... Rb1 $11 32. Nc4 (32. Qxe5 Bxd6 33. Qxd6 Qb5 $11) 32... Nb5 33. Qxe5 Qd8) 32. Rxb6 ({Don't go for} 32. Qxc5 $2 Ne8 $19) (32. Qxe5 $16 {Threatens to win with Nxf7!} Nxd5 33. Qxd5 Bxd6 34. Bc4) 32... axb6 33. Nc4 Bg7 34. Qb3 b5 35. Na5 Qb6 36. Nc6 (36. Nc4 $5 {[%cal Rc4b6]} Qb8 37. d6 $15) 36... Bf6 37. h4 Kg7 38. h5 b4 39. Qf3 (39. Kg2 $11 {remains equal.}) 39... h6 $2 {[%mdl 8192] [#]} (39... Ne8 $17 {stays on course. aiming for ...b3.} 40. Qb3 gxh5) 40. hxg6 $1 $18 fxg6 {[#]} (40... Ne6 $142 41. gxf7 Nf8 42. Qg4+ Bg5) 41. Qg4 $1 {[%cal Rg4d7]} Ne8 42. Qd7+ Kf8 43. d6 h5 44. Bc4 {[%csl Gc4][%cal Rd7f7]} Nxd6 45. Qxd6+ Kg7 46. Qe6 Qc7 47. Kg2 Qb7 48. Bd5 Qc7 {White mates.} 49. Kh3 g5 50. Kg2 Kg6 {[#]} 51. f4 $1 {Precision: White = 51%, Black = 49%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Bacallao Alonso, Yusnel"]
[Black "Gonzalez Feliz, Jesus Eliezer"]
[Result "1-0"]
[ECO "A53"]
[WhiteElo "2554"]
[BlackElo "1845"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,101,39,34,25,62,45,50,54,57,45,45,33,47,0,0,0,-4,0,0,0,9,-9,53,29,25,10,25,25,22,22,22,20,40,40,40,40,41,38,45,42,33,0,27,0,0,0,0,0,0,0,0,0,0,0,95,-15,-15,-16,-10,-10,-11,-21,-22,-37,-41,-45,-1,-3,-4,-97,431,296,878,937,29987,29988,29988,29989,29989,29990,29990,29991,29990,12814,5918,6823,5918,5718,5025,2091,29987,9239,2413,2073]} 1. Nf3 Nf6 2. c4 d6 3. d4 Bg4 4. Qb3 b6 (4... Qc8 5. Nc3 g6 6. h3 Bxf3 7. exf3 Bg7 8. Be2 O-O 9. Be3 e5 10. dxe5 dxe5 11. f4 Nc6 12. fxe5 Nxe5 13. O-O {½-½ (27) Donchenko,A (2569)-Krasenkow,M (2610) Drancy 2016}) 5. g3 g6 $146 ({Predecessor:} 5... e6 6. Bg2 Bxf3 7. Bxf3 d5 8. Nc3 c6 9. cxd5 exd5 10. O-O Be7 11. Bg5 Nbd7 12. e4 dxe4 13. Nxe4 {1-0 (41) Sorokin,A (2085)-Nuretdinov,A (1881) Porto Carras 2013}) 6. Bg2 {A53: Old Indian Defence without Nf3} c6 7. O-O Bg7 8. Nc3 {White is slightly better.} O-O 9. e4 Nbd7 10. Be3 e5 11. d5 (11. Rad1 $14) 11... cxd5 $11 12. cxd5 Nc5 13. Bxc5 bxc5 14. Nd2 Rb8 15. Qc2 Qd7 (15... Bd7 $11) 16. Nc4 (16. f3 $5 {[%cal Rf3g4]} Bh3 17. Bxh3 Qxh3 18. Nc4 $14) 16... Qc7 17. Rfe1 Rb4 18. Bf1 Bd7 19. a3 Rb7 20. a4 Rfb8 {[#]} 21. Nb5 $1 {[%mdl 512]} Bxb5 22. axb5 Rxb5 23. Ra6 Bf8 24. Rea1 {[%mdl 1024] White has compensation.} R8b7 25. Bh3 Ne8 26. R1a2 Qb8 27. Rc6 {Hoping for Rc8.} Nc7 28. Bf1 Rb4 29. Nxd6 Rxb2 30. Rxb2 Rxb2 31. Qc3 Rb6 (31... Rb1 $1 $11 32. Nc4 (32. Qxe5 Bxd6 33. Qxd6 Qb5 $11) 32... Nb5 33. Qxe5 Qd8) 32. Rxb6 ({Wrong is} 32. Qxc5 $2 Ne8 $19) (32. Qxe5 $16 {Strongly threatening Nxf7!} Nxd5 33. Qxd5 Bxd6 34. Bc4) 32... axb6 33. Nc4 Bg7 34. Qb3 b5 35. Na5 Qb6 36. Nc6 Bf6 37. h4 Kg7 38. h5 b4 39. Qf3 (39. Kg2 $11) 39... h6 $2 {[%mdl 8192] [#]} (39... Ne8 $17 {and life is bright. Threatens to win with ...b3.} 40. Qb3 Nd6) 40. hxg6 $1 $18 fxg6 $2 {[#]} (40... Kxg6 41. Qg4+ Kh7) 41. Qg4 $1 {[%cal Rg4d7]} Ne8 42. Qd7+ Kf8 43. d6 h5 44. Bc4 {[%csl Gc4][%cal Rd7f7]} Nxd6 45. Qxd6+ Kg7 46. Qe6 (46. Qd7+ $142 Kh6 47. Bg8 Qxc6 48. Qxc6 Kg7 49. Qe6 Kh8 50. Qe8 Bg7 51. Bf7+ Kh7 52. Bxg6+ Kh6 53. Bf5 Kg5 54. Qg6#) 46... Qc7 47. Kg2 Qb7 48. Bd5 Qc7 49. Kh3 g5 50. Kg2 (50. Qg8+ $142 Kh6 51. Bf7 Bg7 52. Be8 g4+ 53. Kg2 Qd6 54. Qf7 Kh7 55. Ne7) 50... Kg6 {[#]} 51. f4 $1 {Precision: White = 48%, Black = 50%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Vasquez Schroeder, Rodrigo"]
[Black "Lotero, Faiber"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "2553"]
[BlackElo "2092"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,61,89,86,79,56,64,56,56,54,64,50,62,45,52,45,60,38,56,38,71,62,149,122,205,193,202,185,248,235,438,458,551,542,794,763,859,862,802,741,1083,1077,1262,1135]} 1. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} Nf6 2. Nf3 g6 3. c4 c5 4. d5 d6 5. Nc3 Bg7 6. e4 O-O 7. h3 e6 8. Bd3 exd5 9. exd5 a6 {E90: King's Indian: Classical: Early deviations and 6 h3} (9... Nbd7 10. O-O Nh5 11. Re1 Ne5 12. Be2 Nd7 13. Bg5 Bf6 14. Qd2 Ne5 15. Bxf6 Nxf3+ 16. Bxf3 Nxf6 17. Qf4 a6 {1-0 (92) Kazhgaleyev,M (2594)-Vasquez Schroder,R (2554) chess.com INT 2017}) 10. O-O Re8 11. Bf4 {LiveBook: 4 Games} Nh5 {White is better.} 12. Bg5 f6 $146 ({Predecessor:} 12... Qb6 13. Re1 Bd7 14. Ne4 f5 15. Ned2 h6 16. Rxe8+ Bxe8 17. Qe2 Bf7 {1-0 (31) Gudilina,G (2057)-Mukhametgaleeva,R Smolensk 2008}) 13. Bd2 {[#] g4 is the strong threat.} f5 $1 14. Ng5 Be5 15. Qc1 Ng7 16. f4 Bd4+ 17. Kh2 Nd7 18. Nf3 Bf6 19. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Nf8 20. a5 h6 {[#]} (20... b6 $14) 21. Na4 $1 $16 Nh7 (21... Rb8 $16 22. g3 Bd7) 22. Nb6 Rb8 23. Qc2 g5 (23... Nf8 $142 24. Rae1 Bd7) 24. g3 {[%cal Bg2g3,Bg3f4][%mdl 32]} gxf4 $2 (24... Bd7 {might work better.} 25. Rae1 Qc7) 25. gxf4 $18 {White is clearly winning.} Nf8 26. Rg1 Kf7 27. Rg2 Nd7 28. Nxc8 Rxc8 29. Bxf5 Re7 30. Rag1 Rc7 31. Be6+ {Precision: White = 72%, Black = 24%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Zapata, Juan Carlos"]
[Black "Bachmann, Axel"]
[Result "0-1"]
[ECO "E11"]
[WhiteElo "2110"]
[BlackElo "2653"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,101,21,0,0,-18,-14,-8,0,0,0,0,0,0,0,-21,2,-20,-14,-26,-16,-16,-14,-26,-27,-28,-37,-29,-27,-47,-38,-72,-72,-68,-77,-74,-61,-73,-59,-55,-52,-55,-55,-46,-57,-71,-69,-68,-39,-61,-58,-84,-68,-105,-43,-59,-51,-60,-52,-100,-81,-103,-104,-104,-32,-49,-49,-127,-106,-203,-198,-191,-190,-177,-184,-273,-197,-206,-218,-195,-181,-175,-182,-350,-344,-647,-623,-645,-642,-633,-623,-615,-607,-715]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. Nc3 b6 6. g3 Ba6 {E11: Bogo-Indian} (6... Bb7 7. Bg2 O-O 8. O-O d6 9. d5 exd5 10. Nxd5 Bxd2 11. Qxd2 Nbd7 12. Nd4 Nc5 13. b3 Re8 14. Nc6 Qd7 15. Nxf6+ gxf6 16. Nd4 Bxg2 17. Kxg2 {1-0 (42) Romanov,E (2635)-Iordachescu,V (2581) Kishinev 2016}) 7. b3 d5 8. cxd5 exd5 {The position is equal.} 9. Bg2 O-O 10. O-O Re8 {Hoping for ...Bxc3.} 11. Re1 Nbd7 12. a3 Bd6 13. Nxd5 $146 ({Predecessor:} 13. Nh4 Bb7 14. Nb5 {½-½ (41) Schandorff,L (2335)-Kroll,O (2330) Aarhus 1986}) 13... Nxd5 14. e4 Bb7 15. exd5 Bxd5 16. Bc3 Rxe1+ 17. Nxe1 Nf6 18. Bxd5 Nxd5 19. Bb2 Qf6 20. Qf3 Qxf3 21. Nxf3 a4 22. b4 f6 23. Kf1 Kf7 24. Ke2 g5 25. Kd3 b5 26. Re1 Rd8 27. Kc2 h5 28. Nd2 Bf8 29. Ne4 c6 30. Nc3 Nb6 31. Rd1 g4 (31... f5 $17 32. Bc1 Be7) 32. Bc1 $15 f5 33. Ne2 Bg7 34. Rd3 Nd5 35. Be3 Bf6 36. Nc3 Ne7 (36... Nb6 $17 37. Nd1 h4) 37. Ne2 h4 38. gxh4 (38. Nf4 $15) 38... Rh8 $17 39. Nf4 (39. Bf4 $17) 39... Rxh4 $19 40. d5 cxd5 41. Nxd5 Rxh2 {[#] ...g3 is the strong threat.} 42. Kd1 (42. Nxf6 {keeps fighting.} g3 43. Nd7 gxf2 44. Bxf2 Rxf2+ 45. Kc3) 42... Bh4 43. Ke1 Rh1+ 44. Ke2 Ra1 45. Nc7 Ra2+ 46. Kf1 $2 {[#]} (46. Rd2 {was the only defense.} Rxa3 47. Nxb5) 46... f4 $1 {[%cal Rf4e3,Bf5f4,Bf4f3][%mdl 544]} 47. Bd2 $2 (47. Bc5 f3 48. Ke1) (47. Bxf4 Rxf2+) 47... Ra1+ {Black is clearly winning.} 48. Ke2 f3+ 49. Ke3 g3 50. fxg3 Bxg3 {Threatens to win with ...f2.} 51. Kd4 {Precision: White = 42%, Black = 70%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Aponte Castillo, Ernesto"]
[Black "Bruzon Batista, Lazaro"]
[Result "0-1"]
[ECO "A22"]
[WhiteElo "2108"]
[BlackElo "2650"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,118,-12,-19,-21,-18,-18,-23,-15,-17,-16,-26,-27,-22,-27,-18,-23,-1,-14,-22,-33,-41,-28,-18,-22,-18,-16,-22,0,0,-43,0,0,0,0,90,64,118,125,178,170,163,177,214,211,217,168,173,58,130,136,135,129,155,159,163,153,154,122,126,120,137,54,51,50,42,0,0,0,0,-18,-39,-10,-10,-10,-8,-11,-5,-8,0,-8,-8,-8,0,0,-5,-3,-1,-9,0,0,0,0,0,-99,-99,-29974,-29975,-29975,-29976,-29976,-29977,-29977,-29978,-29978,-29979,-29979,-29980,-29980,-29981,-29981,-29982]} 1. c4 Nf6 2. Nc3 e5 3. d3 Bb4 4. Bd2 O-O 5. Nf3 Re8 6. e3 {A22: English Opening: 1...e5 2 Nc3 Nf6} c6 7. a3 Bf8 8. Be2 {Black has an edge.} d5 9. cxd5 cxd5 10. d4 e4 11. Ne5 Nbd7 $146 ({Predecessor:} 11... Bd6 12. Nb5 Bxe5 13. dxe5 Rxe5 {0-1 (29) Neverov,V (2550)-Petursson,M (2560) Oviedo 1993}) 12. Nxd7 Bxd7 13. Qb3 Bc6 14. Rc1 Qd7 15. O-O Bd6 16. f3 exf3 17. Rxf3 Re6 18. Rcf1 Qe7 19. h3 Re8 20. Bd3 {next Bf5 is good for White.} Bb8 21. Bf5 Rd6 (21... Qd6 $11) 22. Be1 $1 $16 Kh8 (22... Rf8 $14) 23. Bh4 Rg8 (23... Qf8 $16 {might work better.} 24. Bb1 Qg8) 24. Qc2 $18 h6 25. Qf2 Re8 26. Bb1 $1 {Qc2 is the strong threat.} Kg8 27. Bxf6 Rxf6 {[#]} 28. Rxf6 ({Only move:} 28. Qc2 $1 $18 {[%cal Rc2h7] Qh7+ would kill now.} Qd6 29. Qh7+ Kf8 30. g3) 28... Qxf6 ({Black should try} 28... gxf6 $14 29. Ba2 (29. Qxf6 Qxf6 30. Rxf6 Rxe3 $11) 29... Qxe3) 29. Qxf6 $16 gxf6 30. Kf2 ({But not} 30. Rxf6 $6 Rxe3 31. Kf2 (31. Rxh6 Bg3 $11) 31... Re6 $11) 30... Kf8 31. Ba2 f5 32. Bxd5 f4 33. Re1 Bxd5 34. Nxd5 fxe3+ 35. Rxe3 {[%mdl 4096] Endgame KRB-KRN} (35. Nxe3 $16 Bf4 36. g4) 35... Rd8 $14 36. Nf6 Bf4 $1 {[%cal Rf4e3]} 37. Re4 Bc1 38. Re2 Rxd4 {White must now prevent ...Rf4+.} 39. g3 Rd6 40. Re8+ Kg7 41. Nh5+ $1 Kg6 42. Nf4+ Kf6 43. Re2 $1 a5 (43... Bxf4 $5 44. gxf4 Kf5 $15) 44. Rc2 Bxf4 45. gxf4 $11 {KR-KR} Rb6 46. Kg3 Rb5 47. Kg4 Kg6 48. Rd2 f6 49. Rf2 h5+ 50. Kh4 a4 51. f5+ (51. Rg2+ $11 {remains equal.} Kh6 52. Rc2) 51... Rxf5 $17 52. Rxf5 $4 {[%mdl 8192]} (52. Rg2+ $17 Rg5 53. Rd2) 52... Kxf5 {Black mates.} 53. Kxh5 {[#] K3P-K3P} Ke4 $1 54. Kg6 f5 55. h4 f4 56. h5 f3 57. h6 f2 58. h7 f1=Q 59. h8=Q Qf5+ {Precision: White = 62%, Black = 64%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Arango, Andres Mauricio"]
[Black "Cori, Jorge"]
[Result "0-1"]
[ECO "B84"]
[WhiteElo "2103"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,62,19,-12,4,-4,-10,-18,-12,-63,-58,-77,-74,-94,-98,-108,-96,-104,-108,-181,-186,-191,-178,-337,-351,-363,-352,-345,-358,-343,-358,-358,-347,-334,-347,-344,-342,-391,-391,-386,-389,-354,-348,-429,-424]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Qc7 6. Be2 a6 7. O-O Nf6 8. Kh1 Be7 9. f4 d6 10. Bf3 O-O 11. g4 Nxd4 {B84: Sicilian Scheveningen: 6 Be2 a6, lines without early Be3} 12. Qxd4 Nd7 13. Qf2 $146 ({Predecessor:} 13. a4 b6 14. g5 Bb7 15. f5 Qc5 16. Qxc5 bxc5 17. Bg2 Rfe8 18. Bf4 Rad8 19. Rad1 Nb8 20. h4 Nc6 21. Rd2 Bf8 {½-½ (21) Lau,R (2467)-Schlosser,P (2554) Germany 2006}) 13... b5 {The position is equal.} 14. Nd1 (14. a3 $11) 14... Bb7 $15 15. Ne3 Bc6 16. Re1 Qb7 17. Qg2 Nc5 $36 {[%cal Rc6e4][%mdl 2048] Keeping White busy.} 18. Nf1 f5 19. gxf5 (19. Nd2 $17) 19... exf5 $19 20. Nd2 Bh4 21. Re2 $2 {[#]} (21. Re3 {only move.}) 21... fxe4 $1 22. Nxe4 Rae8 23. Nd2 Rxe2 24. Qxe2 Rxf4 25. Bxc6 Qxc6+ 26. Qg2 Qxg2+ 27. Kxg2 Rf2+ 28. Kg1 Re2 29. Nf3 Bf2+ 30. Kf1 Rxc2 31. Bd2 Ne4 {Precision: White = 29%, Black = 88%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Soto, Christian Camilo"]
[Black "Sevian, Samuel"]
[Result "0-1"]
[ECO "A25"]
[WhiteElo "2102"]
[BlackElo "2601"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,74,19,17,-8,0,-24,12,-27,46,38,50,11,39,-39,0,-9,-5,-56,-69,-39,-35,-83,-37,-91,-36,-34,-54,-45,0,-51,-37,-60,-31,-37,-27,-104,-100,-91,-48,-59,-65,-92,-80,-70,-86,-77,-87,-79,-90,-96,-101,-118,-108,-449,-439,-443,-439,-622,-597,-975,-748,-758,-758]} 1. c4 e5 2. Nc3 Nc6 3. g3 Bc5 4. Bg2 a6 5. e3 d6 6. Nge2 {A25: English Opening vs King's Indian with ...Nc6 but without early d3} Ba7 7. d4 h5 {[%cal Bh7h5,Bh5h4][%mdl 32] LiveBook: 13 Games} 8. b4 {The position is equal.} (8. h3 h4 9. g4 f5 10. dxe5 fxg4 11. exd6 gxh3 12. Bxh3 Bxh3 13. Rxh3 {0-1 (40) Gajewski,G (2634)-Ragger,M (2680) Chartres 2017}) 8... exd4 9. exd4 h4 $146 ({Predecessor:} 9... Nxb4 10. d5 a5 11. O-O h4 12. Nd4 {0-1 (33) Carlstedt,J (2460)-Bijlsma,N (2298) Helsingor 2015}) 10. Be3 Nce7 (10... Nxb4 $11 11. Qa4+ Nc6) 11. Qd2 Nf5 12. c5 Nge7 13. a4 (13. Bf4 $1 $14) 13... O-O (13... a5 {is more complex.} 14. Bf4 c6 15. cxd6 Nxd6 16. b5 Kf8) 14. O-O Nxe3 15. fxe3 (15. Qxe3 $11 Nf5 16. Qf4) 15... dxc5 $15 16. bxc5 Bxc5 17. gxh4 Ba7 18. e4 (18. Ng3 $15) 18... Nc6 ({Black should try} 18... c5 $1 $17 {[%cal Rc5d4]} 19. d5 Ng6) 19. Nd5 Bg4 {Hoping for ...Bxe2.} 20. Kh1 Ne7 (20... Bxe2 $5 21. Qxe2 Bxd4 $17) 21. Nxe7+ ({Better is} 21. Ndf4 $11) 21... Qxe7 22. Ng3 Rad8 23. d5 c6 24. Qg5 (24. Qf4 $11 {keeps the balance.} Qd7 25. Nf5 Bxf5 26. Qxf5) 24... Qxg5 $17 25. hxg5 Rfe8 26. Rab1 Bc8 27. h4 Bb8 $36 {[%mdl 2048] Black is really pushing.} 28. Nf5 cxd5 29. exd5 {[#]} Re5 $1 30. Nd4 Ba7 31. Nb3 g6 32. Na5 {[#]} Kg7 $1 {...Rh8 is the strong threat.} 33. Rfd1 $2 {[%mdl 8192]} (33. Rf4 $17 {is a better chance.}) 33... Rh8 $19 {Black is clearly winning.} 34. Rb4 Rxg5 35. Bf3 (35. Rd2 $142) 35... Rg3 36. Rf1 Bh3 37. Kh2 Bb8 {Precision: White = 29%, Black = 60%.} (37... Bxf1 $2 38. Kxg3 b5 39. Nb7 $19) 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Caceres Vasquez, Sergio"]
[Black "Fier, Alexandr"]
[Result "0-1"]
[ECO "A69"]
[WhiteElo "2094"]
[BlackElo "2576"]
[Annotator "TA"]
[PlyCount "174"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,174,-10,55,-11,0,-5,0,0,48,31,22,2,36,-7,12,0,2,0,55,60,87,10,8,12,22,16,0,0,7,6,7,0,0,0,83,73,62,0,0,0,0,0,0,0,0,0,0,0,86,72,97,48,54,31,35,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-1,0,-133,-25,-109,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-12847,-12847,-12850,-29978,-29978,-29979,-29979,-29980,-29981,-29981,-29982,-29983,-29983,-29984,-29984,-29985,-29985,-29984]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 O-O 5. f4 d6 6. Nf3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 Re8 10. e5 Nfd7 (10... dxe5 $11 11. fxe5 Ng4) 11. exd6 {A69: Modern Benoni: Four Pawns Attack with 9...Re8} (11. Ng5 $1 $14) (11. O-O dxe5 12. d6 Nc6 13. Ng5 exf4 14. Nxf7 Bd4+ 15. Qxd4 cxd4 16. Nxd8 Rxd8 17. Nb5 g5 18. h4 h6 {½-½ (54) Fier,A (2603)-Bacrot,E (2704) Le Port Marly 2012}) 11... Nf6 12. O-O Qxd6 13. Ne5 {[%cal Bf3e5,Be5c4,Bc4d6][%mdl 32] The position is equal.} Na6 14. Bf3 Rb8 $146 ({Predecessor:} 14... Nc7 15. a4 Na6 16. Nb5 Qd8 17. Nc4 Ne4 18. Re1 f5 {1-0 (31) Uliashov,D (2274)-Smirnov,I (2022) Ukhta 2009}) 15. Nc4 Qd8 16. Nb5 Ne4 17. Bxe4 Rxe4 18. Ncd6 $1 {[%cal Rd6e4]} Rd4 (18... Rb4 $11) 19. Qf3 $14 {Strongly threatening f5.} Nc7 20. Nxc7 (20. f5 $1 $16 {[%cal Rf5g6]} Nxb5 21. Nxb5 Rxd5 22. fxg6 fxg6 23. Bf4) 20... Qxd6 $11 21. Nb5 Qxd5 22. Nxd4 Qxd4+ 23. Be3 Qxb2 24. Bxc5 b6 25. Bf2 Be6 26. a3 Qxa1 (26... Rc8 $11) 27. Rxa1 $16 Bxa1 28. Qd1 ({White should play} 28. g4 $1 $14) 28... Bf6 $11 29. h3 h5 (29... Rd8 $5 {[%cal Rd8d1]} 30. Qa4 Rd7 $15) 30. Qa4 Rb7 31. f5 gxf5 32. Bd4 b5 33. Qb4 Be7 (33... a5 $11 34. Qd6 Bxd4+ 35. Qxd4 b4) 34. Qe1 $16 {[%mdl 1024] White has strong compensation.} Kf8 35. Qg3 a5 36. Qe3 Ke8 37. Qc3 (37. Qf3 $5 {[%cal Rf3b7]} Rc7 38. Qa8+ Kd7 39. Qxa5 $14) 37... b4 38. Qc6+ Rd7 39. axb4 axb4 40. Qb5 b3 41. Qe5 {And now Qh8+ would win.} Rb7 42. Qh8+ Kd7 43. Qa8 Bd5 {Hoping for ...Bc5!} 44. Qa5 Be4 45. Qd2 Ke6 46. Qf4 (46. Qc1 $11) 46... f6 (46... Ba3 $1 $17 47. Qe5+ Kd7) 47. Qc1 (47. Bb2 $1 $11 {was the only way to keep the balance.}) 47... Kd7 ({Black should try} 47... Kd5 $1 $17 {[%cal Rd5d4]} 48. Qb2 Ba3 $1 {[%mdl 512]} 49. Qxa3 Kxd4 50. Qb2+ Kc4) 48. Bb2 $11 Bd5 49. Qf4 Ke6 50. g4 hxg4 51. hxg4 Bc5+ 52. Kf1 fxg4 53. Qxg4+ Kd6 54. Qf4+ Kc6 55. Qa4+ Kc7 56. Qa5+ Kd6 57. Qd8+ Kc6 58. Qc8+ Kb5 59. Qe8+ Kb4 60. Qe1+ Ka4 {White must now prevent ...Re7.} 61. Qe8+ Kb4 62. Qe1+ Kb5 63. Qe8+ Bc6 64. Qd8 Rd7 65. Qb8+ Bb6 66. Ke2 Ka6 (66... f5 $5 {[%cal Rd7e7]}) 67. Qg8 Re7+ (67... f5 $5 {[%cal Rf5f4]} 68. Qe6 Bb5+ 69. Kf3 Rd2 70. Qc8+ Ka7 $11) 68. Kd2 Rd7+ 69. Ke2 Rd5 (69... f5 $5 {[%cal Rf5f4]} 70. Qe6 Bb5+ 71. Kf3 Rd2 72. Qc8+ Ka7 $11) 70. Bxf6 Bb5+ 71. Kf3 Rd3+ 72. Ke4 Re3+ 73. Kf4 {Threatens to win with Qa8+.} Bc6 {...Rf3+ is the strong threat.} 74. Qc8+ Kb5 75. Qf5+ Ka4 (75... Kb4 $5 {[%cal Re3f3]} 76. Kg5 Re4 $15) 76. Qb1 Rf3+ 77. Ke5 Bc7+ 78. Ke6 Re3+ 79. Kf5 $2 {[%mdl 8192]} (79. Kf7 $11) 79... Be4+ $1 $19 80. Qxe4+ Rxe4 81. Kxe4 {[%mdl 4096] Endgame KB-KB. Black mates.} Ka3 82. Kd3 Ka2 83. Kd2 Bd6 ({Stronger than} 83... b2 84. Bxb2 $1 $11 {[%mdl 512]}) 84. Kd1 Ba3 (84... b2 85. Bxb2 $1 $11 {[%mdl 512]}) 85. Bc3 Bb2 ({Worse is} 85... b2 86. Bxb2 $1 $11 {[%mdl 512]}) 86. Bd2 Be5 87. Bc1 Bf4 {Precision: White = 64%, Black = 63%.} ({Inferior is} 87... b2 {[#]} 88. Bxb2 $1 $11 {[%mdl 512]}) 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Sanchez, Jorge Luis"]
[Black "Ortiz Suarez, Isan Reynaldo"]
[Result "0-1"]
[ECO "B87"]
[WhiteElo "2092"]
[BlackElo "2570"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,110,0,0,0,29,0,-11,-67,-66,-67,-54,-56,-52,-67,-66,-86,-45,-64,-64,-64,-68,-44,-59,-97,-55,-47,-54,-56,-41,-26,0,0,26,0,4,8,9,0,31,20,44,38,37,22,14,0,33,4,50,34,47,20,40,32,40,0,0,0,0,0,0,0,0,0,0,0,0,-39,-19,-39,-54,-49,-45,-40,-49,-178,-191,-189,-189,-180,-161,-277,-270,-276,-260,-262,-254,-244,-199,-180,-121,-354,-350,-657,-639,-1026,-1009]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Bb3 b5 8. Qf3 Bb7 9. Bg5 {B87: Sicilian Scheveningen/Najdorf: 6 Bc4, with early ...b5} (9. O-O Nc6 10. Nxc6 Bxc6 11. Re1 Be7 12. Qg3 O-O 13. Bh6 Ne8 14. a3 a5 15. Rad1 Qc7 16. Bg5 Bxg5 17. Qxg5 b4 18. Nb5 Bxb5 19. Qxb5 bxa3 20. bxa3 Nf6 {½-½ (20) Rublevsky,S (2680)-Dominguez Perez,L (2678) Foros 2007}) 9... h6 10. Bxf6 Qxf6 11. Qd3 $146 ({White should try} 11. Qxf6 $11 gxf6 12. O-O) ({Predecessor:} 11. Qe3 Qe5 12. O-O-O Be7 13. f4 Qc5 14. Qh3 Bc8 15. f5 exf5 16. exf5 O-O {1-0 (30) Szakolczai,P (2175)-Varga,C (2186) Hungary 2001}) 11... Nd7 $1 $15 12. O-O-O Nc5 13. Qe3 Be7 14. f3 O-O 15. Kb1 Rac8 16. h4 b4 17. Na4 Nxa4 18. Bxa4 Qe5 19. Nb3 d5 {[%cal Rd5e4]} (19... Bf6 {looks sharper.} 20. Qd4 Qxd4 21. Nxd4 Rfd8 22. Bb3 d5) 20. f4 $1 {[%cal Rf4e5]} Qc7 ({Not} 20... Qxe4 $2 21. Qxe4 dxe4 22. Rd7 $18) 21. Qf2 Rfd8 (21... Bc5 $5 22. Qxc5 Qxc5 23. Nxc5 Rxc5 $15) 22. e5 d4 (22... Bc5 $5 23. Nxc5 Qxc5 $11) 23. Rhe1 Rd5 24. Rd2 Rcd8 25. Red1 a5 26. Nc1 Bc6 27. Bxc6 Qxc6 28. Nd3 a4 29. b3 Ra5 30. g3 Qa6 31. h5 Ra8 32. Qe2 Qc6 33. Nc1 axb3 34. cxb3 Rc5 35. Rxd4 (35. g4 {is more complex.} Rc3 36. Qg2 Qxg2 37. Rxg2 Rd8 38. Nd3) 35... Rc8 {[%cal Rc5c1]} 36. Rc4 Rxc4 37. Qxc4 Qxc4 38. bxc4 Rxc4 $11 {[%mdl 4096] Endgame KRB-KRN} 39. Kb2 f6 40. Rd7 Kf8 41. Rd3 Ke8 42. Rf3 fxe5 43. fxe5 Bg5 44. Nd3 Rc3 45. Ne1 (45. Kb1 $15) 45... Bd2 $1 $19 {[%cal Rd2e1]} 46. Nd3 {[#]} Bc1+ $1 {[%mdl 512]} 47. Kb1 (47. Nxc1 Rxf3) 47... Ba3 $1 48. Re3 (48. g4 {is the only way for White.}) 48... Kd7 $1 {[%cal Rd7c6]} 49. Rf3 {[#]} Kc6 $1 50. Re3 Kb6 51. Rf3 Kb5 52. g4 Kb6 (52... Kc4 $19 53. Nb2+ Kd4 54. Rf4+ Kd5) 53. Re3 $2 {[#]} (53. Rh3 $17) 53... Kc6 $1 {[%cal Rc6b5]} 54. Rf3 $2 (54. Rh3 Kd5 55. Nf4+ Ke4 56. Rxc3 bxc3 57. Ne2 (57. Nxe6 $2 Kd3 $19)) 54... Kb5 55. Re3 {If only White now had time for Rf3....} Kc4 {Precision: White = 37%, Black = 66%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Fuentes Godoy, Lilia Ivonne"]
[Black "Flores, Diego"]
[Result "0-1"]
[ECO "E06"]
[WhiteElo "2088"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,56,28,4,9,-1,45,29,48,13,31,2,37,-6,0,-7,31,-172,-55,-56,-59,-56,-49,-49,-62,-107,-108,-102,-95,-97,-87,-102,-90,-107,-95,-100,-99,-139,-134,-131,-139,-256,-267,-441,-470]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. Qc2 dxc4 7. Qxc4 a6 8. Qc2 Nc6 {[%cal Bb8c6,Bc6b4,Bb4d5,Bd5f6,Bf6e4][%mdl 32] E06: Closed Catalan: Early deviations} (8... c5 9. dxc5 Qa5+ 10. Bd2 Qxc5 11. Qxc5 Bxc5 12. Ne5 Nbd7 13. Nd3 Bd4 14. Bb4 Re8 15. Nd2 Ne5 16. Nxe5 Bxb2 {1-0 (115) Harikrishna,P (2755)-Aravindh,C (2500) Gibraltar 2016}) 9. O-O Nb4 10. Qb3 c5 {White has an edge.} 11. a3 Nbd5 $146 (11... Qd5 $5 {[%cal Rd5b3]} 12. Qd1 Nc6 $11) ({Predecessor:} 11... Nc6 12. dxc5 Bxc5 13. Nc3 h6 14. Rd1 Qe7 15. Na4 Ba7 16. Nb6 {1-0 (33) Postny,E (2619)-Husbands,O (2257) Baku 2016}) 12. Rd1 Qc7 13. Nbd2 cxd4 14. Nxd4 Rd8 (14... Bc5 $5 {[%cal Rc5d4]} 15. Qc4 Nb6 $11) 15. Ne4 $2 {[#]} (15. e4 $1 $14 {stays ahead.} Nf4 16. e5) 15... Nxe4 (15... e5 $19 16. Nc2 Be6) 16. Bxe4 $15 Nf6 17. Bc2 $1 e5 18. Nf3 Be6 19. Qc3 Rxd1+ 20. Bxd1 Qxc3 21. bxc3 Ne4 $36 {[%mdl 2048] Black is on the roll.} 22. Bb2 f6 23. Bc2 {[#]} Nxc3 $1 {[%mdl 512]} 24. Bxc3 {Strongly threatening Be4.} Rc8 25. Bxh7+ Kxh7 26. Bd2 Rc2 27. Rc1 (27. Kf1 $17 {might work better.}) 27... Ra2 $19 28. Rc7 $2 (28. Bb4 Bxb4 29. axb4) 28... Bd6 {Precision: White = 24%, Black = 44%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Okamura, Milton Kasuo"]
[Black "Shabalov, Alexander"]
[Result "0-1"]
[ECO "E33"]
[WhiteElo "2085"]
[BlackElo "2556"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,54,27,27,0,0,0,0,-13,-4,-12,-8,-11,-10,-21,-9,-11,19,-37,-22,-28,0,-8,-4,-14,-3,-28,0,-25,-18,-41,-39,-29,-18,-14,-5,-62,-50,-47,-45,-267,-258,-213,-214,-602,-585]} 1. d4 Nf6 2. c4 Nc6 3. Nf3 e6 4. Nc3 Bb4 5. e3 d6 6. Qc2 e5 {LiveBook: 7 Games. E33: Nimzo-Indian: Classical: 4...Nc6} (6... O-O 7. a3 Bxc3+ 8. Qxc3 a5 9. b3 Re8 10. Bb2 e5 11. dxe5 dxe5 12. Be2 Bf5 13. Nd2 Nd4 14. exd4 exd4 15. Qxd4 Bd3 16. O-O Rxe2 17. Qc3 Rxd2 18. Qxd2 Bxf1 19. Qxd8+ Rxd8 20. Bxf6 gxf6 21. Kxf1 {½-½ (28) Grachev,B (2583)-Grischuk,A (2710) playchess.com INT 2006}) 7. h3 $146 ({Predecessor:} 7. a3 Bxc3+ 8. Qxc3 O-O 9. dxe5 dxe5 10. Nxe5 Nxe5 11. Qxe5 Re8 12. Qc3 Ne4 13. Qc2 Bf5 14. Bd3 Nxf2 15. Bxf5 Nxh1 {0-1 (42) Wozniak,M (2246)-Tsolakidou,S (2355) Khanty-Mansiysk 2016}) 7... O-O 8. Be2 Re8 {The position is equal.} 9. O-O Bxc3 10. Qxc3 Ne4 11. Qc2 Bf5 {Threatens to win with ...Ng3!} 12. Qd1 Qf6 13. d5 Ne7 14. Bd2 (14. Nd2 $11) 14... c6 15. dxc6 bxc6 16. Bb4 a5 17. Ba3 a4 18. Nd2 Nc5 19. Nf3 (19. b4 $5 {[%cal Rb4c5]} axb3 20. axb3 $11) 19... Ng6 20. Rc1 h6 21. Qd2 Ne4 22. Qd1 $1 Red8 23. Qe1 (23. Bd3 $11) 23... d5 24. cxd5 cxd5 25. Qd1 $2 {[#]} ({White should play} 25. Rc7 $15) 25... d4 $1 $19 {[%cal Rd4e3]} 26. exd4 Nf4 27. Nxe5 $2 {[#]} (27. Rc7 Qb6 28. Re7) 27... Rxd4 $3 {[%mdl 512] Precision: White = 33%, Black = 50%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Alvarez, Alvaro"]
[Black "Erenburg, Sergey"]
[Result "0-1"]
[ECO "D30"]
[WhiteElo "2077"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "126"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,126,-12,-8,0,0,0,0,21,17,16,-26,0,0,24,0,22,-16,0,0,0,-8,0,0,0,0,0,-3,0,-46,24,0,0,0,0,0,0,7,0,6,21,-4,-7,0,0,0,0,0,43,-117,0,-47,-1,-52,-59,-53,-59,-54,-51,-52,-47,-77,-52,-68,-27,-107,-91,-112,-114,-114,-125,-128,-114,-115,-7,-21,0,0,0,0,5,0,24,0,0,0,0,-144,-127,-143,-133,-160,0,0,-4,-5,-19,-19,-14,-34,-27,-34,-39,-956,-949,-2191,-2075,-1176,-1021,-883,-877,-1508,-1253,-29982,-29983,-29992,-29993,-29997,-29998]} 1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. e3 a6 5. c5 (5. b3 c5 6. Bb2 Nc6 7. Nbd2 cxd4 8. exd4 g6 9. Bd3 Bg7 10. O-O O-O 11. Rc1 dxc4 12. bxc4 b5 {½-½ (48) Bu,X (2711)-Sethuraman,S (2629) Liaocheng 2017}) 5... b6 6. cxb6 $1 {LiveBook: 3 Games. D30: Queen's Gambit Declined: Systems without Nc3} c5 7. Bd3 Qxb6 $146 ({Predecessor:} 7... Nc6 8. O-O cxd4 9. Nxd4 Nxd4 10. Qa4+ Qd7 11. Qxd4 Bd6 12. a4 e5 {1-0 (33) Stobik,D (2245)-Zeller,F Zell 1991}) 8. O-O {The position is equal.} cxd4 9. exd4 Bd6 10. Qc2 Nbd7 11. Nc3 Bb7 12. Re1 h6 13. Kh1 (13. Na4 $5 {[%cal Ra4b6]} Qa7 14. Be3 $11) 13... Rc8 14. Qe2 O-O 15. Be3 Ng4 16. Bd2 Rfe8 17. h3 Ngf6 18. Be3 Ne4 19. Ne5 Ndf6 (19... Bxe5 $15 20. dxe5 Qb4) 20. Bxe4 dxe4 21. Nc4 Qd8 (21... Qc6 {keeps more tension.} 22. Nxd6 Qxd6 23. Na4 a5 24. Nc5 Bc6) 22. Nxd6 Qxd6 23. Na4 Nd5 (23... e5 $5 {[%cal Re5d4]} 24. Nb6 exd4 25. Nxc8 Rxc8 $11) 24. Nc5 Qb6 25. a3 (25. b4 $5) 25... a5 26. Rac1 f5 27. Rc2 Ba8 28. Rec1 Qd8 29. Qd2 $2 (29. Bd2 $14 {stays ahead.}) 29... Rc6 (29... Qh4 $1 $17 {...f4 is the strong threat.} 30. Qd1 (30. Qxa5 f4 $17) 30... f4) 30. Qe1 Qh4 (30... f4 $5 31. Bd2 $8 e3 32. Bxa5 (32. fxe3 fxe3 33. Bxa5 Qg5 $11) 32... Qf6 $14) 31. f3 (31. Qxa5 $2 f4 $17) (31. Kh2 $11) 31... Qxe1+ $15 32. Rxe1 exf3 33. gxf3 Nxe3 34. Rxe3 Rd6 35. Rc4 f4 $36 {[%mdl 2048] Black has some pressure.} 36. Rd3 Red8 37. Ne4 (37. Kg2 $11 {remains equal.}) 37... Rb6 $1 $17 38. Rd2 Rdb8 39. Rcc2 Rb3 40. Kg2 Re3 41. Rc3 Re1 (41... Rxc3 $17 42. Nxc3 g5) 42. Nc5 $11 g5 43. Nd7 Rd8 44. Rc7 Kf7 (44... Re3 $5 {[%cal Ra8f3]}) 45. Ne5+ Ke8 (45... Kf8 $5 {[%cal Re1e5]} 46. Ng4 Bd5 $11) 46. Rh7 {Black must now prevent Rc2.} Rxe5 $1 47. Rh8+ Ke7 48. Rxd8 (48. Rh7+ $1 $11 Kf8 49. Rh8+ Ke7 50. Rh7+ (50. Rxd8 Bxf3+ 51. Kf2 Re3 $11) 50... Kf8 51. Rh8+ Ke7) 48... Bxf3+ $1 {[%mdl 4096] Endgame KRR-KRB} 49. Kf2 Re3 50. Rc8 {[#]} Bd5 $2 ({Black should try} 50... h5 $1 $17 51. Kf1 g4) 51. Rc3 Rxc3 52. bxc3 {KR-KB} h5 53. Kg1 $1 Kf6 54. Rc2 Bc4 {[%mdl 1024] Black has compensation.} 55. Rb2 $1 g4 {[%cal Bg5g4,Bg4g3][%mdl 32]} 56. Rb8 $2 {[%mdl 8192] [#]} (56. hxg4 $15 hxg4 57. Rb8) 56... g3 $1 $19 57. Rf8+ Kg5 58. Rg8+ Kf5 59. h4 Ke4 60. Rg5 Kf3 61. Rg7 Ke2 {Black mates.} 62. Kg2 Bd5+ 63. Kh3 Kf2 {Precision: White = 48%, Black = 53%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "1"]
[White "Soto, Miguel Angel"]
[Black "Mekhitarian, Krikor Sevag"]
[Result "0-1"]
[ECO "C88"]
[WhiteElo "2072"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,119,30,21,31,7,11,18,53,-7,15,-51,-27,-35,-30,-68,-66,-71,-72,-91,-77,-81,-67,-64,-78,-98,-94,-108,-89,-103,-95,-92,-113,-143,-69,-78,-59,-61,-59,-59,-54,-62,-32,-152,-106,-152,-150,-152,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-79,-95,0,-79,-79,-79,-79,-79,-79,-79,-79,-95,-79,-148,0,-109,-79,-92,-93,-284]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 {[%cal Bf1b5,Bb5a4,Ba4b3][%mdl 32]} a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Be7 7. O-O Bb7 8. c3 O-O 9. Re1 Re8 10. Nbd2 Bf8 {C88: Closed Ruy Lopez: Anti-Marshall Systems} 11. Nf1 Na5 12. Bc2 c5 {The position is equal.} (12... d5 13. exd5 Qxd5 14. Bg5 Qd6 15. Ng3 c5 16. Qe2 Nc6 17. a4 Rab8 18. axb5 axb5 {0-1 (58) Timofeev,A (2670)-Tomashevsky,E (2646) Moscow 2008}) 13. Ng3 (13. Bg5 $14) 13... d5 14. b3 $146 (14. exd5 $11 Qxd5 15. Bg5) ({Predecessor:} 14. exd5 Qxd5 15. Bg5 Qd6 16. Ne4 Nxe4 17. dxe4 f6 18. Qxd6 Bxd6 {½-½ (51) Garcia Martinez,S (2425)-Diaz,J (2430) Santa Clara 1991}) 14... h6 {[%cal Bh7h6,Bh6h5,Bh5h4][%mdl 32]} 15. Bb2 d4 16. c4 Nc6 17. Rf1 g6 18. Nd2 Bc8 19. h3 h5 20. Ne2 h4 21. f4 Nh5 22. f5 Bh6 23. Bc1 Be3+ 24. Kh1 Ra7 25. Qe1 g5 (25... Bf4 $17 26. fxg6 fxg6) 26. Nf3 $15 {[%cal Bd2f3,Bf3h2,Bh2g4][%mdl 32]} f6 (26... Bf4 $5) 27. Ba3 Qb6 28. Nh2 a5 29. Ng4 Bf4 30. Rb1 (30. cxb5 $15 Nb4 31. Qd1 (31. Nxf4 $2 Ng3+ 32. Kg1 exf4 $17)) 30... Kg7 31. Kg1 Nb4 32. Bxb4 cxb4 ({Black should play} 32... axb4 33. Ra1 Bd7) 33. Nxf4 $17 Nxf4 34. Qd2 Bd7 35. Kh2 Rc8 36. Rb2 Be8 37. Rc1 Rb7 38. Bd1 Rbc7 39. Nf2 Rc5 40. Rbc2 Qc7 41. Kh1 Qa7 42. Kh2 R5c7 43. Kh1 Rb8 44. Rb2 Rcb7 45. Rcb1 Bc6 46. Bc2 Qa6 47. Kh2 Be8 48. Bd1 Qc6 49. Kh1 Rb6 50. Bc2 Bh5 51. Bd1 Be8 52. Bc2 $1 Kf8 53. Kh2 Bd7 54. Ng4 Ke7 55. Bd1 Qc5 56. Bc2 Be8 57. Kh1 ({White should try} 57. Bd1) 57... Bd7 58. Kh2 $1 Nh5 59. Qd1 Ng7 60. a4 $2 {Precision: White = 54%, Black = 55%.} (60. Qe1 $17) 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Bachmann, Axel"]
[Black "Palencia Morales, Wilson Guillermo"]
[Result "1-0"]
[ECO "A93"]
[WhiteElo "2653"]
[BlackElo "2343"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,99,9,39,35,29,32,30,33,47,50,35,7,82,71,79,60,159,147,154,126,106,113,150,131,145,144,151,148,213,201,207,204,253,247,241,235,247,222,278,277,271,282,294,301,295,286,295,253,255,252,266,247,251,255,347,344,352,347,524,521,514,508,492,495,592,502,486,473,530,549,651,638,976,952,1374,1302,1444,1383,1966,1940,4790,1823,29982,29983]} 1. Nf3 e6 2. g3 f5 3. Bg2 Nf6 4. c4 Be7 5. d4 d5 6. O-O O-O 7. b3 Bd7 8. Ba3 Be8 {A93: Classical Dutch: Classical Stonewall: 7 b3} 9. Qc1 Nc6 {LiveBook: 3 Games} 10. Bxe7 Qxe7 {White is slightly better.} 11. e3 Bh5 12. Nc3 Rad8 13. Qb2 $146 ({Predecessor:} 13. Rb1 Ne4 14. b4 Nxb4 15. a3 Nd3 16. Qc2 dxc4 17. Rxb7 {1-0 (41) Cheparinov,I (2664)-Radulski,J (2552) Panagyurishte 2012}) 13... Ne4 14. Rac1 Rf7 (14... g5 $11) 15. Ne1 $16 {[%cal Bf3e1,Be1d3,Bd3f4][%mdl 32]} Nb8 16. Nd3 {And now Nf4 would win.} Nxc3 (16... c6 $14) 17. Rxc3 {Black must now prevent Nf4.} ({Much less strong is} 17. Qxc3 Be2 $16) 17... c6 18. b4 {[%cal Bb3b4,Bb4b5][%mdl 32]} Nd7 {and if ...Nb6 works, Black does fine.} 19. cxd5 exd5 20. Nf4 Bg6 21. b5 Nb6 {With the idea ...Na4.} 22. Qa3 Qxa3 (22... Nc4 $16 23. Qxa7 Qb4) 23. Rxa3 $18 Nc8 24. Rb1 Rf6 25. bxc6 bxc6 26. Rb8 Rfd6 27. Bh3 Kf7 28. Nd3 Kf6 29. Nc5 Re8 30. Bf1 Rdd8 31. Ra6 Rd6 32. Nb7 Rde6 33. Na5 Ne7 34. Rxe8 Bxe8 35. Rxa7 g5 36. Nb3 Nc8 37. Rxh7 Bg6 (37... Bf7 {was worth a try.} 38. Be2 Kg6) 38. Rc7 Re8 39. Rxc6+ Kg7 40. Nc5 Bf7 41. Nd3 Ne7 42. Rc7 Ng6 43. a4 {[%cal Ba2a4,Ba4a5,Ba5a6,Ba6a7][%mdl 32]} f4 44. a5 Rb8 45. a6 Rb3 46. Ne5 Nxe5 47. dxe5 Kg6 48. a7 Ra3 49. Rc6+ Kg7 50. Ra6 {Precision: White = 77%, Black = 39%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Bruzon Batista, Lazaro"]
[Black "Escalante Ramirez, Brian Sebasti"]
[Result "1-0"]
[ECO "E71"]
[WhiteElo "2650"]
[BlackElo "2338"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,57,56,92,36,56,72,97,83,77,87,90,88,85,75,159,169,152,154,152,142,324,140,145,137,136,141,117,125,564,575,564,547,797,787,605,390,1107,1222]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. h3 O-O 6. Be3 c5 7. Nf3 cxd4 8. Nxd4 Nc6 9. Be2 Nxd4 10. Bxd4 Be6 11. O-O Qa5 {LiveBook: 3 Games} 12. Rc1 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0} ({White should play} 12. f4 $16) (12. f4 Rfc8 13. b3 Bd7 14. e5 Ne8 15. Nd5 Qd8 16. exd6 Bxd4+ 17. Qxd4 Nxd6 18. Bg4 Nf5 19. Qf2 h5 20. Bxf5 Bxf5 {1-0 (41) Boruchovsky,A (2492)-Guttulsrud,O (2206) Fagernes 2014}) 12... Rfc8 13. b3 a6 14. f4 $146 {[%cal Bf2f4,Bf4f5][%mdl 32] White is better.} ({Predecessor:} 14. Na4 Nd7 15. Bxg7 Kxg7 16. f4 b5 17. f5 Bxc4 18. Qd4+ Kg8 19. Bxc4 bxc4 {½-½ (58) Boettcher,U (2078)-Haselhorst,H (2093) Bad Neuenahr 2014}) 14... b5 {[%cal Rb5c4]} 15. f5 Bd7 16. Bxf6 Bxf6 17. Nd5 {[#] And now fxg6 would win.} Bc6 ({Better is} 17... Bg5) 18. Nxf6+ $16 exf6 19. fxg6 hxg6 20. Qxd6 {Strongly threatening Bg4.} Qxa2 $2 (20... Qd8 $16 21. Qxf6 (21. Rxf6 Bxe4 22. Rcf1 Qxd6 $16) 21... Qxf6 22. Rxf6 Bxe4) 21. Bg4 (21. Qxf6 $18 {and the rest is easy.} Be8 22. Bf3 Qxb3 23. e5 Qe3+ 24. Kh2) 21... Bxe4 {[%csl Ge4][%cal Ra2g2] [#]} 22. Rf2 $36 {[%mdl 2048] Black is under strong pressure.} Qxb3 {Hoping for ...f5.} ({Not} 22... Rc6 $2 23. Qb4 $18 (23. Rxa2 Rxd6 24. cxb5 Kg7 $14)) 23. Bxc8 Rxc8 24. Qxf6 Rf8 $2 {[%mdl 8192]} (24... Bf5 $16) 25. Rf4 $18 Qe3+ 26. Kh2 {White threatens Rh4! and mate.} g5 27. Qxg5+ Bg6 28. Rcf1 b4 $2 (28... Re8 29. cxb5 axb5 30. Qxb5 Qe7) 29. h4 {Precision: White = 58%, Black = 21%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Cori, Jorge"]
[Black "Guerrero Sierra, Juan Carlos"]
[Result "1-0"]
[ECO "D71"]
[WhiteElo "2618"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,75,10,16,28,26,23,6,25,11,11,11,14,20,22,26,26,-12,-1,-12,18,12,95,115,104,103,101,104,172,43,98,97,146,111,109,108,109,89,104,65,187,165,170,164,164,0,5,0,5222,5210,12835,12835,6091,6087,2054,1970,29976,29977,29975,12843]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. Nf3 Nb6 7. Nc3 Nc6 8. e3 O-O 9. O-O Re8 10. Re1 a5 {D76: Fianchetto Grünfeld: Main Line with 7...Nb6} 11. Qe2 (11. h3 a4 12. Rb1 e5 13. d5 Ne7 14. e4 Bd7 15. b3 axb3 16. axb3 c6 17. dxc6 bxc6 18. Be3 {½-½ (50) Van Wely,L (2662)-Sutovsky,E (2624) Tromsoe 2014}) 11... Be6 12. Nd2 Nb4 {...Nc2 is the strong threat.The position is equal.} 13. Rd1 c6 14. a3 N4d5 15. Nce4 Bf5 16. Nc5 {Hoping for e4.} e5 17. e4 exd4 {next ...Qe7 is good for Black.} 18. Ndb3 a4 $146 19. Nxd4 Bxd4 (19... Bxe4 $11 {remains equal.} 20. Bxe4 Bf8) 20. Rxd4 $16 Nf4 21. Bxf4 Qxd4 22. Be3 Qc4 (22... Qd6 $16) 23. Qd2 ({Only move:} 23. Qf3 $1 $18) 23... Red8 (23... Rad8 $14 24. Qa5 Qc2 25. exf5 (25. Qxb6 {gets mated.} Rd1+ 26. Bf1 Bh3 27. Qxb7 Rxa1 28. Qa6 Qd1 29. Bc1 Rxc1 30. Nxa4 Qxf1+ 31. Qxf1 Rxf1#) 25... Nc4) 24. Qe1 $36 {[%mdl 3072] White has strong compensation. White is on the roll.} Bc8 25. Rd1 Bg4 26. f3 $1 Qc2 27. Rc1 ({Don't go for} 27. Rxd8+ $2 Rxd8 28. fxg4 Rd1 $19) 27... Qxb2 {White should prevent ...Bc8.} 28. fxg4 Qxa3 ({Black should play} 28... Nd7 $14) 29. e5 Nd5 30. Bg5 {aiming for e6.} Qb2 31. e6 $2 (31. Bxd8 $18 Rxd8 32. Bxd5 Rxd5 33. e6 Qd4+ 34. Kf1 (34. Qf2 fxe6 35. Qxd4 Rxd4 $16)) 31... f6 $11 32. e7 fxg5 $4 {[%mdl 8192]} (32... Re8 $11 33. Bxd5+ cxd5 34. Qe6+ Kg7) 33. Bxd5+ $18 cxd5 34. exd8=Q+ Rxd8 {[#]} 35. Qe6+ $1 Kh8 {[#]} 36. Rf1 $1 a3 37. Qe7 $1 {[%csl LRb7,LRd8,LRg5]} Rg8 38. Rf7 {Precision: White = 70%, Black = 46%.} (38. Ne6 $142 h6 39. Rf7 Qb1+ 40. Kg2 Qe4+ 41. Kh3 Qxg4+ 42. Kxg4 h5+ 43. Kxg5 Rc8 44. Rh7+ Kg8 45. Qg7#) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Sevian, Samuel"]
[Black "Arias Santana, Mauricio"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2601"]
[BlackElo "2292"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,69,0,0,0,1,3,8,12,-7,-8,-8,8,8,31,33,35,39,29,0,0,0,0,-31,33,39,118,114,152,157,678,688,676,681,627,675,640,644,623,564,614,636,1709,1620]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4 Nb4 9. Be2 O-O 10. Nc3 Bf5 11. a3 Nxc3 12. bxc3 Nc6 13. Re1 Re8 14. Ra2 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves} Bf6 15. Rb2 {LiveBook: 3 Games} b6 {[#]} 16. cxd5 $146 {The position is equal.} ({Predecessor:} 16. Bf4 Na5 17. cxd5 Qxd5 18. Ne5 Bxe5 19. Bf3 Qd7 20. Bxe5 Nc4 21. Rbe2 c6 {½-½ (31) Alekseev,E (2679)-Kramnik,V (2772) Dortmund 2007}) 16... Qxd5 17. Bf4 Re7 18. Nd2 {[%cal Bf3d2,Bd2f1,Bf1g3,Bg3h5,Bh5f4,Bf4d5][%mdl 32]} Rae8 19. Nf1 Qe4 (19... Qa5 $5 {[%cal Ra5c3]} 20. Qc1 Qxa3 $11) 20. Be3 {[#] And now Ng3 would win.} Bd7 21. Ng3 Qd5 22. Nh5 Qd6 23. Qc1 Bh4 {Threatening ...Rxe3!} 24. g3 $36 {[%mdl 2048] White has some pressure.} g6 25. Nf4 Bf6 ({Black should try} 25... Bg5 $1 $15) 26. Bf3 $14 Bg7 ({Black should play} 26... Be6 $14) 27. Rbe2 $16 Kh8 28. Nd5 Bg4 $2 (28... Re6 $16 29. Bf4 Rxe2 30. Rxe2 Qf8 31. Rxe8 (31. Nxc7 Rxe2 32. Bxe2 Kg8 $16) 31... Qxe8 32. Nxc7 Qe7) 29. Nxe7 $18 {White is clearly winning.} ({Less strong is} 29. Bxg4 Qxd5 30. Bg5 f6 $16) 29... Bxf3 30. Bf4 {aiming for Nxg6+.} Qd7 {[#]} 31. Nxg6+ $1 {[%mdl 512]} hxg6 (31... fxg6 32. Rxe8+) 32. Rxe8+ Kh7 {( -> ...Qh3)} 33. R8e3 Bg4 34. Qc2 f5 35. Qa2 {Precision: White = 73%, Black = 27%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Fier, Alexandr"]
[Black "Franco Valencia, Angela"]
[Result "1-0"]
[ECO "A80"]
[WhiteElo "2576"]
[BlackElo "2286"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,65,12,9,8,18,17,26,23,27,4,14,5,11,12,17,3,5,6,6,5,69,58,84,14,13,14,42,35,43,43,63,43,66,57,179,178,180,187,188,181,443,443,440,397,1487,1476,1485,1410,2075,967]} 1. d4 f5 2. b3 Nf6 3. Bb2 e6 4. Nf3 Bb4+ 5. c3 Be7 6. e3 O-O 7. Bd3 b6 8. O-O Bb7 9. c4 Ne4 10. Nbd2 {[%cal Bb1d2,Bd2f3,Bf3e1,Be1c2,Bc2a3,Ba3b5][%mdl 32] E14: Queen's Indian: Classical Variation (4 e3)} (10. Nfd2 Na6 11. f3 Nd6 12. Nc3 Bf6 13. Ne2 c5 14. a3 Qe7 15. Qb1 Rae8 16. b4 e5 17. dxc5 bxc5 {½-½ (49) Goganov,A (2635)-Grischuk,A (2752) Novosibirsk 2016}) 10... d5 11. Ne5 Nd7 12. Ndf3 {White has an edge.} Ndf6 $146 ({Predecessor:} 12... Bf6 13. Rc1 Bxe5 14. Nxe5 Nxe5 15. dxe5 Nc5 16. Be2 dxc4 17. Rxc4 {0-1 (37) Rack,M-Holfelder,H (2315) Wiesbaden 1993}) 13. Qc2 Bd6 14. Ne1 c5 15. f3 Ng5 16. Rd1 Qc7 17. Qe2 Rad8 18. Nc2 Bxe5 (18... Nf7 $11) 19. dxe5 $14 Nd7 20. h4 (20. cxd5 $16 Bxd5 21. Na3) 20... Nf7 $11 21. f4 Nh6 22. Na3 {Black must now prevent Nb5.} Nb8 $1 23. Nb5 Qe7 24. g3 Ba8 25. Nd6 $36 {[%mdl 2048] Black is under pressure.} Nf7 (25... Nc6 $14) 26. cxd5 $18 {And now Bxf5 would win.} Nxd6 27. exd6 Rxd6 28. dxe6 Qb7 $2 {[#]} (28... Bd5 {was called for.} 29. Be5 Rxe6) 29. e4 $1 {[%mdl 512] Strongly threatening Bc4.} Rxd3 (29... fxe4 30. Bc4) 30. Qxd3 ({Weaker is} 30. Rxd3 Qxe4 31. Qxe4 Bxe4 $18) 30... fxe4 $2 (30... Qxe4 31. Qxe4 Bxe4) 31. Qe3 {White is clearly winning.} Qe7 32. f5 Bc6 {[#]} 33. Be5 {Precision: White = 57%, Black = 29%.} (33. Bxg7 $142 $1 {[%mdl 512]} Rc8 (33... Qxg7 34. f6) 34. Bb2) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Ortiz Suarez, Isan Reynaldo"]
[Black "Blandon, Luis Guillermo"]
[Result "1/2-1/2"]
[ECO "E68"]
[WhiteElo "2570"]
[BlackElo "2269"]
[Annotator "TA"]
[PlyCount "163"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,163,14,21,4,17,16,20,10,18,23,21,8,17,-12,0,0,0,0,11,-31,28,25,24,21,33,31,33,31,37,34,28,2,2,3,3,6,10,0,0,0,0,0,27,0,0,0,22,0,0,0,0,0,0,0,0,0,0,0,7,0,15,11,14,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,0,18,0,4,0,0,0,0,0,0,0,453,453,453,450,453,412,410,410,406,397,353,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d4 d6 6. c4 Nbd7 7. Nc3 e5 8. e4 c6 9. b3 Qb6 10. dxe5 dxe5 11. Qc2 Re8 12. Na4 {E68: King's Indian: Fianchetto: 6...Nbd7 7 0-0 e5 8 e4} (12. Rd1 Nc5 13. h3 a5 14. Be3 Qb4 15. Bxc5 Qxc5 16. Rd2 Qa3 17. Rc1 {½-½ (17) Zaremba,A (2245)-Paschall,W (2365) Philadelphia 1998}) 12... Qc7 13. Rd1 $146 ({Predecessor:} 13. Ba3 Bf8 14. Bb2 Nh5 15. Rad1 Nc5 16. Nxc5 Bxc5 17. Qc3 {0-1 (48) Radosavljevic,N (2129)-Nikolic,M (2212) Belgrade 2005}) 13... Bf8 14. Bb2 Nc5 15. Nxc5 Bxc5 16. h3 Nh5 17. Kh2 f6 18. Ne1 Be6 19. Nd3 Bf8 20. g4 Nf4 ({Black should try} 20... Ng7 $15) 21. Nxf4 $11 exf4 22. Bf3 Bg7 23. Rd2 Rad8 24. Rad1 Rxd2 25. Rxd2 Rd8 26. Bc3 Rxd2 27. Qxd2 Kf7 28. Kg2 c5 29. Qb2 g5 30. Qc2 h6 31. a4 Qd7 32. Be2 (32. e5 $5 fxe5 33. Qh7 $11) 32... h5 {[%cal Rh5g4]} 33. f3 Qd6 34. Bd3 hxg4 35. hxg4 Bd7 36. Qe2 Bc6 37. Bc2 Qe6 38. Qd1 Bf8 39. Qh1 Bg7 40. Qh7 Kf8 (40... Bxa4 $5 41. bxa4 (41. e5 Bc6 $11) 41... Qxc4 $11) 41. a5 b6 42. axb6 axb6 43. Kf2 Be8 44. Qh1 Bc6 45. Qa1 Qe7 46. Bd3 Kf7 47. Qb2 Qd8 48. Qe2 Qh8 49. Kg2 Qa8 50. Bc2 Qd8 51. Qe1 Qd7 52. Qa1 Qb7 53. Qh1 Kg8 54. Kf2 Kf8 55. Qh7 Qe7 56. e5 fxe5 57. Qf5+ Kg8 58. Qc8+ Qe8 59. Qc7 Qa8 $2 {[%mdl 8192] [#]} (59... Qd7 $11 60. Qb8+ Qe8) 60. Bxe5 $18 Bxe5 61. Qxe5 Qd8 62. Qe6+ Kf8 63. Qh6+ Kf7 64. Bg6+ ({Don't play} 64. Qg6+ Kf8 $18) 64... Ke6 {[#] And now ...Qd2+ would win.} 65. Be4+ $2 ({White must play} 65. Bf5+ $18 Ke5 66. Qe6+ (66. Qxc6 Qd2+ 67. Kf1 Qd1+ 68. Kf2 Qd2+ 69. Kg1 Qe1+ 70. Kg2 Qe2+ 71. Kh3 Qf1+ 72. Kh2 Qf2+ 73. Kh1 Qe1+ 74. Kh2 Qg3+ 75. Kh1 Qe1+ 76. Kh2 Qg3+ 77. Kh1 Qe1+ $11) 66... Kd4 67. Qxc6) 65... Ke5 $1 $11 {The position is equal.} 66. Qg7+ Kd6 67. Qg6+ Ke5 68. Qf5+ Kd6 $1 69. Qg6+ (69. Ke2 $5 {[%cal Rf5g6]} Bxe4 70. fxe4 $11) 69... Ke5 70. Qg7+ Kd6 71. Qg6+ Ke5 72. Ke2 (72. Bxc6 {feels hotter.} Qd2+ 73. Kf1 Qd1+ 74. Kg2 Qe2+ 75. Kh3) 72... Bxe4 73. Qxe4+ {[%mdl 4096] Endgame KQ-KQ} Kf6 74. Qf5+ Kg7 75. Qe5+ Qf6 76. Qd5 Qb2+ 77. Kf1 Qb1+ 78. Kg2 Qc2+ 79. Kf1 Qc1+ 80. Kg2 Qc2+ 81. Kh3 Qh7+ 82. Kg2 {Precision: White = 54%, Black = 66%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Flores, Diego"]
[Black "Romero Barreto, Jaime Jose"]
[Result "1-0"]
[ECO "A20"]
[WhiteElo "2567"]
[BlackElo "2266"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,71,30,32,58,52,47,33,61,62,41,41,93,5,13,12,33,27,61,50,50,45,54,47,156,141,143,144,223,225,229,218,287,174,168,172,165,168,281,262,272,276,306,306,424,430,422,421,406,397,5285,5365,29979,29980,6411,1752,29988,1416]} 1. c4 e5 2. g3 Nf6 3. Bg2 Nc6 4. Nc3 Bb4 5. Nd5 O-O 6. Nf3 Re8 7. O-O Bf8 8. d3 {A29: English Opening: Four Knights Variation with 4 g3} Nxd5 (8... h6 9. e4 d6 10. h3 Nxd5 11. cxd5 Ne7 12. d4 exd4 13. Nxd4 c6 14. dxc6 Nxc6 15. Nb5 Be6 16. Nc3 Rc8 {1-0 (38) Damljanovic,B (2555)-Drenchev,P (2517) Tivat 2011}) 9. cxd5 {LiveBook: 5 Games} Nb4 10. Bg5 {White is slightly better.} Be7 11. Qb3 $146 {Threatens to win with d6.} ({Predecessor:} 11. Bd2 Nxd5 12. Nxe5 Nf6 13. Qb3 d5 14. d4 c6 15. Rac1 Bd6 {1-0 (61) Zoltek,T (2313)-Orvisky,V La Pineda 2004}) 11... Na6 12. Be3 d6 13. Rac1 f5 (13... c5 $14) 14. Rc4 ({White should play} 14. Qc4 $16) 14... Bf6 $11 15. Rfc1 $36 {[%mdl 2048] White has the initiative.} b6 16. Qa3 Bb7 17. h4 Qc8 18. Ng5 h6 19. Ne6 Nc5 (19... Rxe6 $1 $14 20. dxe6 Bxg2 21. Kxg2 c5) 20. Bxc5 $16 ({But not} 20. Nxc5 $6 dxc5 21. b4 Qd8 $11) 20... dxc5 21. b4 e4 (21... Bxd5 $16 22. Nxc7 (22. Bxd5 c6 $16) 22... Bxg2) 22. dxe4 $18 fxe4 23. Bxe4 {And now Qf3 would win.} c6 24. dxc6 Bxc6 25. Bxc6 Qxc6 26. Nf4 g5 (26... Be5 {keeps fighting.} 27. Nd3 (27. bxc5 Bxf4 28. Rxf4 Rxe2 $16) 27... cxb4 28. Qxb4 (28. Rxc6 bxa3 29. R1c4 Bf6 $14) (28. Rxb4 Qd6 $16) (28. Nxb4 Qe6 $16) 28... Qd5 29. Nxe5 Qxe5) 27. hxg5 hxg5 28. Nh5 Be7 29. bxc5 Bxc5 30. Rxc5 bxc5 31. Rxc5 Qg6 32. Qa5 Qb1+ $2 {[#]} (32... Qxh5 33. Rxg5+ Qxg5 34. Qxg5+ Kf8 35. Qf5+ Kg8) 33. Kh2 Re7 34. Rxg5+ Kf8 35. Rf5+ (35. Qd5 $142 Qh7 36. Qxa8+ Kf7 37. Qd5+ Kf8 38. Rf5+ Qxf5 39. Qxf5+ Ke8 40. Nf4) 35... Ke8 36. Qd5 {Precision: White = 67%, Black = 29%.} (36. Nf6+ $142 Kf8 37. Ne4+ Ke8 38. Qa4+ Rd7 39. Nf6+ Kf8 40. Nxd7+ Ke7 41. Qh4+ Kd6 42. Qd4+ Ke7 43. Qf6+ Kxd7 44. Qg7+ Kd6 45. Qg6+ Ke7 46. Rf7+ Ke8 47. Qg8#) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Shabalov, Alexander"]
[Black "Vittorino, Carlo Giovanni"]
[Result "1-0"]
[ECO "C85"]
[WhiteElo "2556"]
[BlackElo "2257"]
[Annotator "TA"]
[PlyCount "153"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,153,-5,-4,-25,-24,-32,-25,-22,-20,-20,-11,-12,-21,-4,-4,-8,15,20,24,15,25,0,-2,-60,-55,-60,-64,-54,0,-97,-13,-24,0,-6,-6,-6,-8,-55,0,-15,-15,-15,0,0,0,0,0,0,6,0,0,0,0,0,0,0,0,0,64,10,19,14,18,12,54,30,72,62,70,77,65,69,77,59,97,86,114,99,103,84,232,234,231,230,197,99,356,351,351,351,324,348,327,297,310,322,335,323,387,350,444,550,542,456,539,455,361,360,358,375,413,389,554,539,408,202,234,247,234,230,211,181,406,418,1004,888,565,416,407,385]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Bxc6 dxc6 7. Qe1 Nd7 8. b3 O-O 9. Bb2 Bd6 10. d3 {C85: Closed Ruy Lopez: Deferred Exchange Variation} Re8 11. Nbd2 Nf8 12. Nc4 Ng6 13. Qe3 (13. d4 exd4 14. Nxd6 cxd6 15. Nxd4 f6 16. Qc3 c5 17. Qc4+ d5 18. Qxc5 dxe4 {½-½ (68) Wang,Y (2442)-Zhao,J (2634) China 2016}) 13... c5 {LiveBook: 5 Games} 14. g3 {[#]} Bh3 $146 ({Predecessor:} 14... h5 15. Ncd2 Nf8 16. a4 Bh3 17. Rfc1 f6 18. Kh1 {½-½ (18) Plaskett,H (2490)-Davies,N (2523) West Bromwich 2004}) 15. Rfe1 f6 (15... b5 $5 {[%cal Rb5c4]} 16. Nxd6 cxd6 $11) 16. Nfd2 Qd7 17. Qe2 Be6 18. Ne3 Ne7 {[%cal Bg6e7,Be7c6,Bc6d4][%mdl 32]} 19. f3 $1 Rf8 20. Rf1 Rae8 21. f4 exf4 22. gxf4 Nc6 23. Rf2 (23. f5 $5 {[%cal Rf5e6]} Bf7 24. Kh1 $11) 23... f5 {With the idea ...fxe4.} 24. Raf1 (24. e5 $11 Nd4 25. Qf1) 24... Nd4 $15 25. Qh5 fxe4 $1 26. Nxe4 Bf5 ({Better is} 26... Bh3 $1 $15 27. Ng2 (27. Bxd4 cxd4 28. Qd5+ Qe6 $17) 27... Qf5 28. Qxf5 Bxf5) 27. Bxd4 (27. Nxf5 $11 Rxf5 28. Qh4) 27... cxd4 (27... Bxe4 $17 28. Be5 Bc6) 28. Nxf5 $11 Qxf5 29. Qf3 c6 30. Qg2 $132 {[%mdl 2048] White puts up resistance} Re6 31. Kh1 Rh6 (31... Rg6 $15 32. Nxd6 Qd7) 32. Rf3 ({Much weaker is} 32. Rg1 Rg6 $17) 32... Rg6 33. Qf2 Qd5 34. f5 Rh6 35. h3 $1 Be5 36. Qg2 Bf6 37. Rf4 Qe5 38. Qg3 Kh8 39. Kg2 Qd5 {Strongly threatening ...Be5.} 40. Rg4 Be5 41. Qf3 Bf6 (41... Qa5 $11) 42. a4 (42. Nxf6 $14 Qxf3+ 43. Rxf3 Rhxf6 44. Rxd4) 42... Qe5 43. Rf2 Bh4 44. Re2 Qd5 (44... Rxf5 $2 45. Ng5 $18) ({Don't blunder} 44... Qxf5 $2 45. Qxf5 Rxf5 46. Nd6 $1 $18 {[%mdl 512]}) 45. Nd2 Qd8 46. Qe4 Bf6 47. Nf3 Rh5 48. Qe6 Qc8 49. Rf4 c5 50. Qxc8 Rxc8 51. Re6 Kg8 52. Kg3 Kf7 (52... Rh6 $16 {keeps fighting.}) 53. Rb6 $1 $18 Rc7 54. Kg4 Rh6 55. h4 ({White should try} 55. Re4 $18) 55... Be7 $2 {[%mdl 8192]} (55... Kf8 $16) 56. Ne5+ Kf8 57. Rxh6 gxh6 {[%mdl 4096] Endgame KRB-KRN} 58. f6 Bd6 59. Kf5 b5 60. axb5 axb5 61. Re4 Ra7 62. Nc6 Rc7 63. Nd8 {aiming for Ne6+.} Rd7 64. Ne6+ $1 Kf7 65. Rg4 Bf8 66. Nxf8 Kxf8 {KR-KR} 67. Ke6 Ra7 68. Kd5 Ra2 (68... h5 {was worth a try.} 69. Rg5 Ra2 70. Kxc5 Rxc2+ 71. Kxd4 b4) 69. Kxc5 Rxc2+ 70. Kxd4 (70. Kxb5 $142 Rc3 71. b4 (71. Rxd4 Rxb3+ 72. Kc4 Rb6 $16)) 70... Kf7 {[#]} 71. Rf4 $1 b4 {[#]} 72. Ke3 $1 Rh2 73. Rxb4 Rh3+ $2 (73... Kxf6 {is a better defense.} 74. Re4 Rb2) 74. Kd2 Kxf6 (74... Rf3 $142 75. Rb7+ Ke6 76. Rxh7 Rxf6) 75. Re4 Rg3 76. b4 {[%cal Bb3b4,Bb4b5][%mdl 32]} Rg8 77. b5 {Precision: White = 68%, Black = 45%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Escobar Medina, Andres F"]
[Black "Iturrizaga Bonelli, Eduardo"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "2343"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,61,20,9,-11,1,-3,5,8,11,12,16,10,18,15,11,-4,12,5,20,8,14,10,72,22,40,50,54,47,43,16,28,31,27,-26,6,-32,19,0,-10,-50,-43,-101,-103,-85,-104,-230,-218,-418,-307,-1371]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. Be3 Nf6 7. a3 b5 8. Bd3 {B43: Sicilian: Kan Variation: 5 Nc3} (8. Qd2 Bb7 9. f3 h5 10. Be2 Nc6 11. O-O-O b4 12. axb4 Bxb4 13. Nxc6 Bxc6 14. Qd4 Rb8 15. Qa7 Bb7 {0-1 (38) Lopez Silva,H (2426)-Pichot,A (2517) Antofagasta 2016}) 8... Bb7 9. Qf3 d6 10. Qg3 {The position is equal.} Nbd7 11. O-O h5 {[%cal Bh7h5,Bh5h4][%mdl 32]} 12. h3 $146 ({Predecessor:} 12. f3 Nc5 13. Nde2 h4 14. Qf2 d5 15. Bf4 e5 16. Bg5 Nxd3 17. cxd3 {0-1 (36) Sanchez Lopez,L (1642)-Martinez,J (2189) Ibague 2013}) 12... h4 13. Qf3 Be7 14. Nb3 d5 15. Bf4 e5 {[#] aiming for ...dxe4.} 16. Bh2 {[%cal Re4d5]} dxe4 17. Nxe4 Nd5 (17... O-O $11) 18. Ned2 Rc8 19. Rfe1 Nf4 20. Be4 Bxe4 21. Qxe4 {Bxf4 is the strong threat.} (21. Nxe4 {feels hotter.} Ng6 22. Nd4 Nf6 23. c3 O-O 24. Qf5) 21... Ng6 22. Rac1 (22. Nf3 {is more complex.} O-O 23. c3 Bf6 24. a4 Rfd8 25. axb5 axb5 26. Qf5) 22... O-O 23. c4 ({Better is} 23. Qf5) 23... b4 24. a4 Bg5 ({Black should try} 24... Qc6 $15) 25. Qf5 Bh6 26. c5 Qc6 27. Rc4 {[#]} (27. Qg4 $15) 27... Bxd2 $1 $17 28. Nxd2 Qd5 29. Qg5 (29. Qc2 $17 {might work better.} Rxc5 30. Rd1) 29... Nxc5 $19 30. Qe3 $2 (30. Rec1 {is the only way for White.}) 30... Nd3 31. Rec1 $2 {Precision: White = 22%, Black = 57%.} (31. Qe4 Qd6 32. Rb1) 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Echavarria, Johann"]
[Black "Cordova, Emilio"]
[Result "0-1"]
[ECO "B28"]
[WhiteElo "2309"]
[BlackElo "2651"]
[Annotator "TA"]
[PlyCount "158"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,158,40,45,48,34,58,52,53,52,58,50,72,46,54,40,47,47,45,39,35,46,48,19,78,86,91,79,91,100,96,16,15,21,24,22,13,9,20,16,12,13,20,13,12,5,101,100,264,67,120,110,206,188,279,181,177,168,179,167,177,169,183,124,68,10,10,19,17,10,74,0,0,0,0,4,7,7,7,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,50,-9,-9,-11,-11,-1087,-1087,-986,-1029,-897,-897,-760,-724,-627,-627,-575,-389,-581,-549,-29961,-29959,-29962,-29960,-29963,-2905,-2905,-2275,-1511,-1366,-950,-727,-29969,-29972,-29971,-29974,-29973,-29973,-29972,-29968,-29964,-29965,-29970,-29971,-29970,-29972,-29975,-29976,-29979,-29980,-29980,-29981,-29979,-29981]} 1. e4 c5 2. Nf3 a6 3. c4 e6 4. Nc3 Qc7 5. Be2 b6 6. O-O Bb7 7. d4 cxd4 8. Nxd4 Nf6 {A34: Symmetrical English: 2 Nc3, lines with ...d5} 9. f3 Bd6 (9... Be7 10. Be3 O-O 11. Qd2 d6 12. Rfc1 Nbd7 13. b4 Rfe8 14. Na4 Bf8 15. Rab1 Rac8 16. Bf1 Qb8 17. Qf2 Ba8 18. Nb3 Rc6 19. Rd1 Rec8 20. Rb2 Ne5 {½-½ (123) Nepomniachtchi,I (2767)-Pantsulaia,L (2607) Doha 2016}) 10. Kh1 {Threatens to win with Ncb5!} Be7 {White is slightly better.} 11. Be3 d6 12. Qd2 Nbd7 13. Rfc1 O-O 14. b4 $146 ({Predecessor:} 14. a4 Rab8 15. b4 Ba8 16. Nd1 {½-½ (29) Kanarek,M (2500)-Zubov,A (2611) Krakow 2014}) 14... Rac8 15. a3 Rfe8 16. Nb3 Qb8 17. Rab1 Rcd8 18. Bf1 Ba8 (18... d5 $11) 19. Qf2 $16 d5 20. exd5 exd5 21. c5 Ne5 22. cxb6 (22. Bd4 $16) 22... Neg4 23. fxg4 Nxg4 {[%csl Gg4][%cal Rb8h2]} 24. Qf4 Nxe3 25. Qxe3 {Na4 is the strong threat.} d4 $1 {[%cal Rd4e3]} 26. Qf2 {And now Na4 would win.} (26. Nxd4 Bf6 $17) 26... dxc3 27. Rxc3 Rd6 28. Re1 $36 {[%mdl 2048] Black must now prevent Rce3. White has the initiative.} Rf6 (28... Rxb6 $2 29. Rxe7 $1 {[%mdl 512]} Rf6 30. Rxe8+ Qxe8 31. Qe2 $18) 29. Qg1 Bd5 (29... Rxb6 $2 30. Rxe7 $1 {[%mdl 512]} Rd6 31. Rxe8+ Qxe8 32. Rc1 $18) (29... Bd6 $11 {remains equal.} 30. Rxe8+ Qxe8) 30. Na5 {aiming for Bc4.} h5 $2 (30... Kf8 $16 {was necessary.}) 31. Bxa6 $2 ({Only move:} 31. Rce3 $1 $18) 31... Rg6 (31... Bf8 $14) 32. Bf1 $1 {Strongly threatening Rce3.} ({Not} 32. Rxe7 $2 Rxe7 33. Rc2 (33. Rc8+ Qxc8 34. b7 Qd8 35. Bf1 Re1 36. Nc4 Rxf1 37. Ne3 Bxg2+ 38. Nxg2 Qd1 39. b8=Q+ Kh7 40. Qh8+ Kxh8 41. h4 Rxg1+ 42. Kh2 Rh1#) 33... h4 $19) 32... h4 (32... Qxb6 $16 33. Qxb6 Rxb6) 33. Rce3 $18 Be6 (33... Qf4 {might work better.} 34. b7 (34. Rxe7 Rxe7 35. Rxe7 h3 $11) 34... Re6 35. Rxe6 fxe6) 34. Nc6 Qxb6 35. Nxe7+ Rxe7 36. Bd3 Rg5 37. h3 Qd4 38. Be4 ({White should try} 38. Re5 $18 Qf4 39. Qe3 Qxe3 40. R1xe3 Rxe5 41. Rxe5) 38... Bxh3 $16 39. Rxh3 (39. Bc6 $14 Be6 40. b5) 39... Rxe4 $11 40. Qxd4 Rxd4 $16 {[%mdl 4096] Endgame KRR-KRR} 41. Rb1 Rd2 {[#]} 42. Rh2 ({Better is} 42. a4 $1 $16) 42... Ra2 $11 43. Rxh4 Rxa3 44. b5 {Hoping for b6.} Ra7 45. b6 Rb7 46. Rhb4 (46. Ra1 {is interesting.} f6 47. Rb4 Rd5 48. Kh2 Kf7 49. Kg3) 46... Rg6 47. Kg1 Kf8 48. Kf2 Ke7 49. Kf3 Rf6+ 50. Ke3 Kd6 51. R4b2 Rf5 52. Kd4 Re5 53. Kc4 Rd5 54. Kc3 (54. Rb5 $1 $14 Rd2 55. Rf5) 54... Kc6 55. Kc4 Rbd7 {( -> ...Rd3)} 56. b7 $2 {[%mdl 8192]} (56. Rb5 $11 Rxb5 57. Rxb5) 56... Rc5+ $19 57. Kb4 Rxb7+ 58. Ka4 Rc4+ 59. Ka3 Rc3+ 60. Ka4 Rxb2 61. Rxb2 {KR-KR} Rg3 62. Rd2 {[#]} (62. Rf2 $142 Kc5 63. Rc2+ Kd4 64. Kb4) 62... Kc5 $1 63. Rd7 f5 64. Rd2 g6 65. Ra2 Rg4+ (65... Kd4 $142 66. Kb5 g5 67. Kc6 g4 68. Kd6 f4 69. Ra4+ Ke3 70. Ke5 f3 71. Ra3+ Kf2 72. gxf3 gxf3 73. Ra2+ Kg1 74. Ra1+ Kg2 75. Kd4 f2 76. Ke5 f1=Q 77. Rxf1 Kxf1 78. Ke4 Ke2 79. Ke5 Rd3 80. Ke4 Rd1 81. Kf4 Rd4+ 82. Kf5 Kf3 83. Ke5 Rd1 84. Kf6 Ke4 85. Ke6 Kf4 86. Kf6 Re1 87. Kg6 Re6+ 88. Kg7 Kg5 89. Kf7 Re1 90. Kg7 Rf1 91. Kh8 Kh6 92. Kg8 Kg6 93. Kh8 Rf8#) 66. Ka5 Kd4 67. Kb5 Rg3 68. Kc6 Ke5 69. Re2+ Kf4 {Black mates.} 70. Kd5 Re3 71. Ra2 Kg3 72. Kd4 Re6 73. Kd5 Re4 74. Ra6 g5 {[%cal Bg6g5,Bg5g4][%mdl 32]} 75. Rf6 Kg4 76. Rh6 Re2 77. Rh2 f4 78. Kd4 Kg3 79. Rh5 g4 {Precision: White = 41%, Black = 71%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Torres, Juan Camilo"]
[Black "Kovalyov, Anton"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "2275"]
[BlackElo "2643"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,106,31,28,48,3,8,10,6,5,12,12,13,-14,0,-31,-29,-48,-12,-15,-22,-20,-17,-37,0,-49,-14,-85,-88,-81,-76,-101,-101,-109,-104,-108,-114,-110,-93,-102,-104,-98,-94,-94,-96,-98,-66,-98,-96,-96,-96,-103,-100,-105,-66,-66,-66,-69,-71,-65,-31,-31,-31,-40,-42,-50,-46,-46,0,0,0,-12825,-11096,-6079,-5736,-29961,-29962,-29959,-29963,-29957,-29954,-29948,-29951,-8875,-12249,-29943,-29937,-29978,-29979,-29979,-29979,-29979,-29980,-29980,-29981]} 1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 Bb7 5. O-O c5 6. c4 d6 7. Nc3 Nbd7 8. b3 g6 {E14: Queen's Indian: Classical Variation (4 e3)} (8... a6 9. Bb2 g6 10. d5 exd5 11. Nxd5 Bxd5 12. cxd5 Bg7 13. e4 O-O 14. h3 b5 15. Re1 Rb8 16. Bc2 {0-1 (83) Cramling,P (2525)-Hou,Y (2629) Beijing 2013}) 9. Bb2 (9. d5 $5) 9... Bg7 10. Qe2 O-O {The position is equal.} 11. Rad1 cxd4 $146 ({Predecessor:} 11... a6 12. Bb1 Qc7 13. Rd2 Rfe8 14. Rfd1 Rad8 15. h3 Qb8 16. dxc5 Nxc5 {1-0 (37) Kurajica,B (2520)-Abramovic,B (2520) Kladovo 1991}) 12. exd4 Re8 13. Bb1 a6 14. Ne4 Qc7 15. Rc1 Rac8 16. Qe3 Qb8 17. Nxf6+ Nxf6 18. Rfe1 Qa8 19. Rc3 d5 20. cxd5 (20. c5 $11) 20... Nxd5 21. Rxc8 Rxc8 22. Qd2 Nf6 23. Qf4 Bxf3 24. Qxf3 Qxf3 25. gxf3 Nd5 26. Be4 Nf4 27. Kf1 f5 28. Bb1 Kf7 29. Rc1 Rxc1+ 30. Bxc1 $17 {[%mdl 4096] Endgame KBB-KBN} Nd5 31. Bb2 Bh6 32. Bd3 Nb4 33. Bb1 Bd2 34. a3 Nd5 35. Bd3 a5 36. Bc4 Bc3 (36... Bf4 $5 {[%cal Rf4h2]} 37. Kg2 g5 $15) 37. Bxc3 Nxc3 $15 {KB-KN} 38. a4 g5 39. Ke1 Kf6 40. Kd2 Nd5 (40... Na2 {seems wilder.} 41. Bf1 Nb4 42. Kc3 Ke7 43. Kc4 Kd7) 41. Bxd5 $1 exd5 $11 {KP-KP} 42. h3 $2 {[%mdl 8192] [#]} (42. f4 $11) 42... Kg6 $19 43. Ke2 Kh5 44. Kf1 Kh4 45. Kg2 f4 46. Kh2 h6 {[%cal Bh7h6,Bh6h5,Bh5g4,Bg4g3][%mdl 32]} 47. Kg2 h5 48. Kh2 g4 49. hxg4 hxg4 {Black mates.} 50. Kg2 {[#]} g3 $1 {[%cal Rg3f2]} 51. fxg3+ fxg3 {[%cal Bf4g3,Bg3g2][%mdl 32]} 52. Kf1 Kh3 53. Kg1 g2 {Precision: White = 55%, Black = 74%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Hernandez, Cristian Andres"]
[Black "Delgado Ramirez, Neuris"]
[Result "0-1"]
[ECO "B94"]
[WhiteElo "2259"]
[BlackElo "2613"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,68,37,42,3,82,34,48,43,85,81,56,61,58,44,62,10,67,-41,-46,-100,-104,-95,-92,-101,-86,-166,-162,-168,-143,-139,-122,-166,-165,-220,-184,-233,-233,-253,-257,-246,-211,-225,-226,-210,-218,-461,-464,-591,-601,-855,-848,-813,-720]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. f4 g6 {B94: Sicilian Najdorf: 6 Bg5 Nbd7} 8. Qf3 Bg7 9. O-O-O Qc7 {LiveBook: 16 Games. White is slightly better.} 10. g3 $146 ({Predecessor:} 10. h4 h6 11. Bxf6 Nxf6 12. e5 dxe5 13. fxe5 Qxe5 14. Nc6 bxc6 15. Qxc6+ Nd7 16. Qxa8 {½-½ (37) Oparin,G (2575)-Korobov,A (2674) Gjakova 2016}) 10... e5 (10... O-O $11 {keeps the balance.}) 11. Nb3 h6 12. Bh4 O-O 13. Bh3 exf4 14. gxf4 Nb6 {[%cal Bd7b6,Bb6c4,Bc4b2][%mdl 32]} 15. Kb1 Bxh3 16. Qxh3 Rac8 (16... Nh5 $1 $11) 17. Qd3 (17. Bxf6 $14 Bxf6 18. Rd3) 17... Nh5 $15 {[%cal Rg7c3]} 18. Qxd6 (18. f5 $15) 18... Qxd6 $17 19. Rxd6 Nc4 20. Rd7 Nxf4 21. Rf1 {[#]} (21. Bg3 $17 Bxc3 22. Bxf4 Bxb2 23. Bxh6) 21... g5 $1 $36 {[%mdl 2048] Black is in control.} 22. Bg3 {[#]} Nxb2 $1 {[%mdl 512]} 23. Bxf4 {Strongly threatening Bc1.} (23. Kxb2 Rxc3) 23... Bxc3 24. Bc1 Na4 25. Ba3 (25. Rxb7 $142 Be5 26. Bd2) 25... Rfd8 26. Rfxf7 Be5 27. h3 Nc3+ 28. Ka1 b5 ({Don't play} 28... Nxe4+ 29. Bb2 $17) 29. Bb2 {[#]} Rxd7 $1 30. Rxd7 Rf8 {Hoping for ...Na4.} 31. Re7 $2 (31. Nc1) 31... Rf1+ {Black is clearly winning.} 32. Nc1 Bf4 33. Bxc3 Bxc1 34. Rg7+ Kf8 {Precision: White = 23%, Black = 66%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Sanchez Alvarez, Kelvin Antonio"]
[Black "Pichot, Alan"]
[Result "0-1"]
[ECO "B56"]
[WhiteElo "2257"]
[BlackElo "2577"]
[Annotator "TA"]
[PlyCount "128"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,128,29,23,29,30,30,72,32,64,0,3,-12,0,-20,-16,-20,-12,-14,-7,-10,-12,0,0,0,6,-14,-8,-10,-8,0,-7,-14,-12,-17,-12,-15,0,0,0,-19,0,-19,25,33,92,0,0,-40,-48,-31,-24,-60,-61,-65,47,-45,-54,-50,-62,-58,-54,-54,-75,-98,-102,-134,-103,-137,-93,-106,-45,-155,-143,-131,-131,-152,-171,-230,-200,-286,-271,-293,-286,-270,-243,-294,-239,-404,-406,-833,-808,-720,-724,-825,-837,-790,-833,-774,-754,-670,-644,-12829,-11919,-7070,-6627,-12843,-12843,-12844,-12844]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f3 e5 7. Nb3 Be7 8. Be3 O-O 9. Qd2 Be6 10. Nd5 Bxd5 11. exd5 Nb8 12. Be2 {B56: Classical Sicilian: Unusual Lines} (12. g4 Nbd7 13. g5 Nh5 14. O-O-O f5 15. gxf6 Rxf6 16. Kb1 Nf4 17. Rg1 Nf8 18. Qb4 b6 19. Nd2 N8g6 {½-½ (60) Svidler,P (2726)-Karpov,A (2644) Odessa 2009}) 12... a5 13. a4 Nbd7 14. O-O {White is better.} Qc7 15. c4 (15. Bb5 $14) 15... Nh5 $146 ({Predecessor:} 15... b6 16. Rfe1 Nc5 17. Nxc5 bxc5 18. Bd3 Rfb8 19. Rab1 Nd7 {½-½ (58) Reschke,H (2469)-Larsen,S (2434) England 1998}) 16. Rfd1 b6 17. Qc2 g6 18. Nd2 {[%cal Bb3d2,Bd2b1,Bb1c3,Bc3b5][%mdl 32]} f5 19. Nb1 Nf4 20. Bf1 Nc5 21. Nc3 Bg5 {White should prevent ...Nh3+!} 22. Re1 {[#] g3 is the strong threat.} Qd8 23. Bf2 Nh5 24. Rad1 Bh4 25. g3 Bg5 26. Nb5 Nf6 27. Bg2 Bh6 28. Re2 Qd7 29. Rde1 Rf7 30. Bh3 Qd8 31. Bg2 f4 32. Bh3 {Strongly threatening Bxc5.} fxg3 (32... Rf8 $14) 33. Bxc5 ({Much worse is} 33. Bxg3 $6 Rf8 $14) (33. hxg3 $16 {Threatens to win with Bxc5.} Rf8 34. b3) 33... bxc5 34. Be6 (34. hxg3 $5 {[%cal Rh3e6]} Rf8 35. Be6+ Kg7 36. Qc3 $14) 34... Bf4 35. hxg3 Bxg3 36. Rf1 Nh5 {[%cal Bf6h5,Bh5g7,Bg7f5,Bf5e3][%mdl 32]} 37. Rg2 Kg7 (37... Kf8 $1 $15) 38. Bxf7 (38. Bg4 $1 $14) 38... Kxf7 $15 39. Qe4 {And now Qg4 would win.} Bf4 {[%mdl 1024] Black has compensation.} 40. Rg4 Qf6 41. Kf2 Ng7 42. Rfg1 Nf5 43. Ke2 Ne3 44. Kd3 Nxg4 45. fxg4 Ke7 (45... Bg5 $17 46. Ke2 Qe7 47. Rf1+ Kg8) 46. Kc2 (46. Qe1 $15) 46... Bg5 $17 47. Rh1 {[#]} h6 $1 48. Kb1 Rf8 49. Ka2 (49. Nc7 {was worth a try.}) 49... Qf4 $19 50. Qe2 (50. Qc2 $142) 50... Qf3 51. Qe1 Qxg4 52. Qxa5 Qxc4+ 53. Ka3 {intending Qa7+.} Qxd5 54. Qc7+ $2 (54. Qa7+ Kf6 55. Rf1+ Bf4 56. Nc3) 54... Ke6 55. Rh3 (55. Rg1 $142) 55... Rf1 {[%cal Rf1a1] Black is clearly winning.} 56. Qc8+ Kf7 {[%cal Rf1a1]} 57. Qb7+ Qxb7 58. Nxd6+ Ke6 {[%cal Rf1a1]} 59. Nxb7 {[%mdl 4096] Endgame KRB-KRN} e4 {[%cal Be5e4,Be4e3,Be3e2][%mdl 32]} 60. Nxc5+ Kd5 61. Nb3 e3 62. Rh2 Rf2 63. Rh1 e2 {( -> ...Rf1)} 64. Re1 Be7+ {Precision: White = 37%, Black = 61%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Del Castilho, Martyn"]
[Black "Vasquez Schroeder, Rodrigo"]
[Result "0-1"]
[ECO "B43"]
[WhiteElo "2254"]
[BlackElo "2553"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,116,11,-15,45,31,18,-6,0,-10,0,-56,-40,-29,-8,-13,-15,-40,0,0,0,0,0,0,0,-45,-69,-69,0,0,43,54,68,66,152,149,144,137,364,364,362,362,539,533,534,514,523,506,504,502,1031,535,451,124,95,128,111,88,182,102,88,0,57,57,57,57,59,57,57,39,39,31,39,38,55,-15,-15,-28,-45,-56,-34,-37,-47,-106,-95,-82,-81,-261,-252,-275,-276,-262,-253,-404,-366,-469,-462,-454,-404]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 Qc7 6. g3 {[%cal Bg2g3,Bg3g4,Bg4g5][%mdl 32]} Nf6 7. Bg2 d6 8. O-O Be7 9. f4 {[%cal Bf2f4,Bf4f5][%mdl 32]} O-O 10. g4 Nc6 11. Nb3 {[#] LiveBook: 16 Games. B80: Sicilian Scheveningen: 6 g3 and 6 Be3, including English Attack} g6 (11... d5 $1 $11 {[%mdl 512]}) (11... b5 12. g5 Nd7 13. a3 Bb7 14. f5 Rae8 15. Qh5 Nce5 16. Nd4 exf5 17. exf5 Bd8 18. Bf4 Bxg2 19. Kxg2 Qb7+ 20. Kh3 Bb6 21. Rad1 g6 {½-½ (35) Alekseev,E (2710)-Adhiban,B (2567) Tromsoe 2013}) 12. g5 Nh5 13. f5 {The position is equal.} Ne5 $146 ({Predecessor:} 13... f6 14. fxe6 Bxe6 15. Nd5 Qd8 16. gxf6 Bxf6 17. Bh6 {½-½ (54) Ererdem,G (1902)-Arig,B (1740) Akhisar Manisa 2009}) 14. f6 Bd8 15. Kh1 (15. a4 $11) 15... b5 (15... h6 $5) 16. Ne2 h6 17. Nf4 Nxf4 18. Rxf4 hxg5 19. Rf1 Kh7 $1 20. Bxg5 Rh8 $1 21. Rf4 {And now Qe1 would win.} Kg8 22. Rh4 Rxh4 23. Bxh4 Bb7 (23... Nd7 $1 $15 24. Qd4 Bb7) 24. Qd2 $1 $11 {[%cal Rd2h6] White wants to mate with Qh6.} Kh7 25. Bg5 {[%cal Bh4g5,Bg5f4,Bf4e5][%mdl 32]} Kg8 26. Qf2 Kf8 (26... Nd7 $14) 27. Qh4 $16 {[%cal Rh4h8]} Ke8 28. Bf4 $1 {[%cal Rf4e5] Strongly threatening Bxe5.} Kd7 $2 (28... Qxc2 $2 29. Bxe5 dxe5 30. Rc1 $18) (28... Nc4 $16 {was called for.}) 29. Bxe5 $1 $18 dxe5 30. Rd1+ Kc6 (30... Kc8 $142 31. Qh8 Bc6) 31. Qf2 {[%csl Gb3][%cal Rf2c5]} Bc8 {If only Black now had time for ...Kb7....} 32. Qd2 Bxf6 33. Na5+ Kb6 34. b4 Qe7 (34... Ka7 $142 35. Qf2+ Kb8 36. Qxf6 Ra7) 35. c4 Bb7 36. c5+ $2 (36. Qd7 $18 {is the precise move to win. c5+ would kill now.} Rc8 37. c5+ (37. Nxb7 Rc7 $11) 37... Ka7 38. Nxb7) 36... Kc7 $16 {next ...Rd8 is good for Black.} 37. c6 $1 {[%mdl 1024] White has strong compensation.} Bc8 38. Qc3 {Black must now prevent Rd7+!} Rb8 {[#]} (38... Ra7 $16 {was worth a try.}) 39. Qe3 (39. Rf1 $1 $18) 39... Rb6 40. Qc3 (40. Rf1 $16) 40... Bg7 (40... Rb8 $1 $11) 41. a3 $14 f6 42. Qg3 g5 43. Qc3 g4 44. Qg3 f5 $1 45. h3 gxh3 46. Qxh3 Qf6 47. Qh5 ({Better is} 47. Qc3 $14) 47... Qh6 $11 48. Qxh6 Bxh6 49. Kh2 Rb8 50. Kg3 Be3 51. Rh1 (51. Kh4 $15) 51... f4+ $17 52. Kf3 Bb6 {...Bxa5 is the strong threat.} 53. Rc1 $2 {[#]} (53. Rh7+ $17 Kd6 54. Rh8) 53... Bxa5 $1 $19 54. bxa5 b4 55. axb4 Rxb4 56. Rh1 (56. Rc3 $142) 56... Ra4 57. Rh8 Rxa5 58. Bh3 Rc5 {Precision: White = 43%, Black = 50%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Garavito, Miguel Angel"]
[Black "Peralta, Fernando"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "2247"]
[BlackElo "2569"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,114,16,12,-9,-2,-6,-6,-11,-9,-42,-36,-41,-35,-35,-35,-35,-35,-35,-31,-29,-31,-54,-45,-47,-48,-45,-46,-52,-51,-58,-54,-114,-110,-157,-153,-152,-155,-169,-169,-199,-203,-204,-205,-193,-165,-162,-168,-164,-165,-171,-173,-169,-158,-201,-199,-202,-177,-199,-160,-237,-235,-242,-180,-225,-231,-239,-232,-326,-326,-317,-322,-487,-457,-609,-606,-692,-683,-4698,-2068,-29966,-29969,-29969,-29970,-29970,-29971,-29973,-29973,-29973,-29974,-29974,-29975,-29975,-29976,-29975,-29976,-29975,-29976,-29975,-29975,-29973,-29975,-29974,-29974]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O Nbd7 8. cxd5 {E11: Bogo-Indian} (8. Qc2 c6 9. Rd1 b6 10. b3 a5 11. Bc3 Ne4 12. Ne5 Nxe5 13. Bxe4 f5 14. Bxd5 exd5 15. dxe5 f4 16. cxd5 cxd5 17. Bd4 Ba6 18. Qc6 Bxe2 {½-½ (28) Ding,L (2773)-Giri,A (2785) Moscow 2017}) 8... exd5 9. Nc3 c6 10. Qc2 {The position is equal.} Re8 11. Nh4 $146 ({Predecessor:} 11. Bf4 Nf8 12. Bg5 g6 13. Bxf6 Bxf6 14. b4 Bf5 15. Qb3 a6 16. a4 Nd7 17. a5 Nf8 18. e3 Ne6 19. Ne5 Nc7 {½-½ (41) Kazakovskiy,V (2399)-Bok,B (2594) St Petersburg 2016}) 11... Nb6 12. b3 Ne4 13. Nxe4 dxe4 14. Qxe4 Bxh4 15. Qxh4 Qxh4 16. gxh4 Rxe2 17. Be3 Bf5 18. Rfc1 Rd8 19. Rc5 Nd5 20. Bxd5 Rxd5 21. Rxd5 cxd5 $15 {[%mdl 4096] Endgame KRB-KRB} 22. h3 (22. Kg2 $15) 22... Bxh3 $17 23. Rc1 Rxa2 24. Rc7 b6 25. Bf4 h5 26. Rb7 Rb2 27. Rxa7 Rxb3 28. Bd6 Be6 29. Ra4 Rc3 30. Rb4 Rc6 31. Be7 Bd7 32. Kg2 {[#]} b5 $1 33. Kf3 (33. Rxb5 Rg6+) 33... Rc3+ 34. Kg2 Kh7 35. Rb2 Kg6 36. Re2 (36. f3 $17 {was necessary.}) 36... Rd3 $19 37. Bc5 Rh3 38. Re7 Bf5 39. Rb7 Rxh4 40. Rxb5 (40. f3 $142) 40... Rg4+ 41. Kf3 h4 42. Rb8 (42. Rb1 {was called for.}) 42... h3 43. Rh8 Rg2 44. Ke2 h2 {Strongly threatening ...Bg4+.} 45. Kf3 Be4+ 46. Ke3 {[#]} Rxf2 $1 {[%mdl 512] Black mates.} 47. Kxf2 h1=Q 48. Rxh1 Bxh1 {KB-KB} 49. Bf8 f6 50. Be7 Kf7 51. Bd8 g5 52. Kg3 Kg6 53. Kh2 Be4 54. Kg3 Bd3 55. Kf3 Bb5 56. Ke3 f5 {[%cal Bf6f5,Bf5f4][%mdl 32]} 57. Kf3 f4 {Precision: White = 30%, Black = 84%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Cortes Orihuela, Javier"]
[Black "Cruz, Cristhian"]
[Result "0-1"]
[ECO "A40"]
[WhiteElo "2235"]
[BlackElo "2558"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,70,34,31,28,33,30,35,37,41,36,26,51,51,51,51,51,43,51,52,67,74,79,72,92,24,14,20,37,37,273,265,314,329,325,329,320,333,310,247,277,0,-14,0,-15,-268,-277,-276,-284,-280,-284,-272,-287,-267,-281,-469,-481,-2377,-2332]} 1. d4 e6 2. c4 Nf6 3. g3 Bb4+ 4. Bd2 a5 5. Bg2 d6 6. Nf3 Nbd7 7. O-O e5 8. Be3 exd4 {E11: Bogo-Indian} (8... O-O 9. Qc2 exd4 10. Bxd4 Re8 11. Nc3 c6 12. Rad1 Qe7 13. a3 Bc5 14. Rfe1 h6 15. e4 Bxd4 16. Nxd4 {½-½ (70) Postny,E (2616)-Van Wely,L (2685) Novi Sad 2016}) 9. Bxd4 O-O 10. Nc3 Bc5 {White is slightly better.} 11. Qc2 Re8 12. Rad1 Qe7 13. e4 $146 ({Predecessor:} 13. Rfe1 c6 14. Na4 Bb4 15. Nd2 Ra6 16. a3 {1-0 (45) Gunina,V (2516)-Guichard,P (2338) Reykjavik 2015}) 13... Bxd4 14. Nxd4 Nc5 15. Rfe1 Bg4 16. f3 {[%cal Bf2f3,Bf3f4,Bf4e5][%mdl 32] Strongly threatening e5.} Bd7 17. h3 {[%cal Bh2h3,Bh3h4][%mdl 32]} Rad8 18. f4 Bc8 19. e5 (19. Nd5 $16 Nxd5 20. cxd5) 19... dxe5 $11 20. fxe5 Nfd7 21. Nd5 $36 {[%mdl 2048] White has some pressure.} Qg5 $2 {[#]} (21... Qf8 $1 $14) 22. h4 $1 $18 {[%cal Rh4g5]} Qg4 ({Much weaker is} 22... Qxg3 $6 23. Nf5 $16) 23. Nf5 ({Stronger than} 23. Nxc7 Rxe5 24. Ne2 Rf8 $15) 23... Kh8 24. Nxc7 Rf8 25. Rd4 Qg6 26. Rd6 Ne6 27. Nxe6 $2 (27. Nd5 $18 Ndc5 28. b3) 27... fxe6 $11 28. Nd4 {Black must now prevent Qxg6.} Qxg3 29. Qc3 $2 {[%mdl 8192]} (29. Qe2 $11 {and White has nothing to worry.} Rde8 30. Rxe6) 29... Qf2+ $19 30. Kh1 Qxh4+ 31. Kg1 Qf2+ 32. Kh1 {[#]} Nxe5 $1 {[%mdl 512]} 33. Rxd8 (33. Rxe5 Rxd6) 33... Rxd8 34. Rxe5 $2 (34. Rf1 Qh4+ 35. Kg1) 34... Rxd4 35. Rc5 (35. Qe3 $142 Rh4+ 36. Bh3 Qxb2 37. Rb5) 35... Rh4+ {Precision: White = 46%, Black = 62%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Rodriguez Rivera, Pedro"]
[Black "Bacallao Alonso, Yusnel"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2228"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,119,-21,-35,-24,-58,-53,-56,-68,-66,-78,-60,-61,-75,-34,-32,-36,-43,0,0,0,-14,0,0,0,0,0,0,0,0,0,0,0,0,0,-20,-17,-25,-26,-18,-17,-34,-34,-34,-34,-35,-18,-18,-22,-34,-27,-27,-27,-27,-28,-33,-27,-91,-98,-104,-88,-95,-88,-106,-115,-118,-44,-50,-56,-231,-247,-448,-438,-460,-193,-195,-173,-197,-149,-197,-156,-168,-160,-154,-160,-206,-183,-209,-204,-207,-216,-220,-226,-226,-226,-226,-222,-265,-264,-241,-226,-820,-775,-1150]} 1. d4 Nf6 2. Nf3 d5 3. Bf4 c5 4. e3 Nc6 5. c3 Qb6 6. Qc1 Bf5 7. Be2 e6 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} (7... h6 8. O-O e6 9. Nbd2 Rc8 10. Bd1 Be7 11. Bc2 Bxc2 12. Qxc2 O-O 13. Qb3 Nh5 14. Be5 Rfd8 15. Rfe1 {1-0 (133) Nikolic,P (2623)-Ibarra Jerez,J (2513) Budva 2009}) 8. h3 Rc8 9. O-O Be7 10. Nbd2 {LiveBook: 3 Games} O-O 11. Ne5 cxd4 {aiming for ...Nxe5.} 12. Nxc6 bxc6 13. exd4 c5 14. dxc5 Bxc5 15. Nb3 $146 Be7 16. Qe3 Qb7 17. Bd3 {[#]} d4 $1 {[%mdl 512]} 18. cxd4 (18. Nxd4 Nd5) 18... Nd5 19. Be4 Rc2 20. Bxd5 Qxd5 21. Rfc1 Rxb2 22. Rc7 Bf6 23. Rxa7 h6 24. Ra5 Qe4 25. Qxe4 Bxe4 26. Rd1 Bd5 27. Rd2 Rb1+ 28. Kh2 Rc8 29. Rc5 Ra8 30. Rc1 Rxc1 31. Nxc1 Ra3 32. Bd6 Ra6 33. Bf4 g5 {[%mdl 1024] Black has compensation.} 34. Be5 Be7 35. Rc2 f6 36. Bg3 Ra4 37. Rc8+ (37. Nb3 $11 {keeps the balance.}) 37... Kf7 38. Rc7 {Bd6 is the strong threat.} Ke8 $1 39. Rc8+ Kd7 $1 {[%cal Rd7c8]} 40. Rh8 Rxd4 {White must now prevent ...Rd2.} 41. Rxh6 {[#]} Rd2 (41... f5 $1 $17 {[%cal Rf5f4] Strongly threatening ...f4.} 42. Be5 Rd2) 42. h4 $1 $15 gxh4 43. Bxh4 $2 {[#]} (43. Rxh4 $15 Ba3 44. Rh7+ Ke8 45. Nb3 Rxa2 46. Nd4) 43... Bd6+ $1 $19 44. Bg3 $2 (44. Kh3 {is the only way for White.} f5 45. Rh7+ Kc6 46. Ra7) 44... Rxf2 $1 45. Bxd6 Kxd6 {[%mdl 4096] Endgame KRB-KRN} (45... Rxg2+ $142 46. Kh3 Kxd6) 46. Rg6 Be4 47. Rg3 Rc2 48. Nb3 Rxa2 {And now ...e5 would win.} 49. Nd4 Ke5 50. Nf3+ Kf4 51. Ng1 f5 52. Nh3+ Ke5 53. Kg1 Bd5 54. Nf2 Ra1+ 55. Kh2 Rf1 56. Nh3 Kd4 57. Rg8 e5 {[%cal Be6e5,Be5e4][%mdl 32]} 58. Rb8 f4 59. Rb2 $2 (59. Rf8) 59... e4 60. Rb8 {Precision: White = 53%, Black = 57%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Herrera, Juan Sebastian"]
[Black "Ramirez, Alejandro"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "2220"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,86,31,49,50,39,40,25,10,27,18,27,5,21,-18,-14,-15,-15,-58,-33,-29,0,-7,0,-87,-59,-79,-43,-104,-81,-91,-81,-83,-74,-66,-60,-75,-17,-103,-102,-160,-120,-121,0,-159,-143,-320,-326,-312,-302,-304,-333,-390,-251,-329,-307,-295,-187,-491,-261,-247,-246,-283,-270,-252,-253,-654,-645,-912,-906,-813,-790,-1083,-874,-799,-857,-864,-805,-1468,-1398]} 1. d4 d6 2. Nf3 Nf6 3. c4 g6 4. Nc3 Bf5 5. Qb3 Qc8 6. Nh4 {E61: King's Indian: Early deviations for White, including Smyslov System} Bd7 7. e4 Bg7 (7... Nc6 8. Nf3 e5 9. d5 Nd4 10. Qd1 Bg4 11. Be3 Bxf3 12. gxf3 Bg7 13. f4 {½-½ (47) Wang,H (2734)-Svidler,P (2759) Almaty 2016}) 8. h3 {White has an edge.} O-O 9. Nf3 e5 10. d5 Nh5 $146 ({Predecessor:} 10... Na6 11. Be3 Nh5 12. O-O-O f5 {½-½ (63) Gonzalez Gonzalez,A (1995)-Garcia del Rey,S (2273) Oviedo 2007}) 11. c5 dxc5 12. Be3 b6 13. O-O-O c6 14. Kb1 cxd5 15. exd5 Na6 16. Bb5 (16. Ng5 $11) 16... Nc7 17. Be2 Nf4 18. Bf1 (18. Bxf4 $15 exf4 19. d6) 18... Qb7 19. Bxc5 Bf5+ 20. Ka1 Rfd8 {[%cal Rc7d5]} 21. Be7 Rd7 22. d6 Be6 (22... Nce6 $17) 23. Qa4 {[#]} ({Of course not} 23. dxc7 Rxe7 24. Bc4 (24. Rd8+ Re8 $17) 24... Rxc7 $17) (23. Qa3 $11 Rc8 24. Rc1) 23... b5 $1 $17 {[%cal Rb5a4]} 24. Qa5 (24. Bxb5 $142 Nxb5 25. Qxb5) 24... a6 25. Ng5 Bf5 (25... Rc8 $17 {...Ncd5 is the strong threat.} 26. Rg1 Ncd5 27. Nxd5 Bxd5) 26. f3 $2 (26. dxc7 $11 Rxe7 27. Rd8+ Bf8 28. Bxb5 Qxg2 29. Rhd1) 26... Ncd5 27. g4 $2 (27. Nxd5 $17 Nxd5 28. Be2) 27... Nxe7 $19 28. dxe7 Rxd1+ 29. Nxd1 Qxe7 30. h4 Qd8 $40 {[%cal Rd8d1][%mdl 128] Black has strong attack.} 31. Qe1 Rc8 {[%cal Rc8c1]} 32. Nc3 Bd3 33. a3 $2 {[#]} (33. Bxd3 {is tougher.} Qxd3 34. Qe4) 33... Bc2 (33... e4 $142 $1 {[%mdl 512]} 34. Ngxe4 (34. Ncxe4 Qe7) 34... Bxe4 35. fxe4 Qe7) 34. Rh2 Bb3 35. Nge4 Qe7 36. h5 f5 37. Nd2 $2 {[#]} (37. gxf5 gxf5 38. Ng3) 37... Rxc3 $1 {[%mdl 512] Black is clearly winning.} 38. hxg6 (38. bxc3 Qxa3+) 38... e4 39. gxh7+ Kh8 {( -> ...Qxa3+!)} 40. Nb1 Rc8 {And now ...e3 would win.} 41. Qe3 Bf7 42. gxf5 Qe5 43. fxe4 {[#]} Nd3 $1 {[%mdl 512] Precision: White = 23%, Black = 59%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "2"]
[White "Brizuela Abreu, Reivis Gabriel"]
[Black "Kaidanov, Gregory S"]
[Result "0-1"]
[ECO "D45"]
[WhiteElo "2219"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,60,0,0,0,0,0,0,0,22,-45,-47,-50,-47,-52,-36,-91,-87,-87,-16,-88,-88,-112,-90,-268,-261,-240,-246,-305,-146,-143,-137,-148,-152,-152,-150,-139,-147,-130,-126,-29998,-29999]} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. Be2 O-O 8. b3 b6 9. Bb2 Bb7 10. O-O Re8 11. Rfd1 Qe7 12. e4 {D45: Semi-Slav: 5 e3} (12. Rac1 Rad8 13. a3 c5 14. cxd5 exd5 15. Qf5 a6 16. dxc5 bxc5 17. Bf1 Ne5 18. Nxe5 Bxe5 19. Na4 Bxb2 20. Nxb2 {0-1 (33) Mareco,S (2635)-Artemiev,V (2653) Doha 2016}) 12... Nxe4 13. Nxe4 dxe4 14. Qxe4 {The position is equal.} Nf8 15. Ne5 (15. c5 $11 bxc5 16. Ne5 (16. dxc5 Bxc5 17. Ne5 f6 $11)) 15... c5 $1 $15 16. Qe3 f6 {aiming for ...cxd4.} 17. Nf3 Rad8 18. Qc3 $146 ({Better is} 18. a3 $15) ({Predecessor:} 18. Bd3 Bxf3 19. Qxf3 cxd4 {0-1 (38) Dragomarezkij,E (2445)-Zvjaginsev,V (2400) Moscow 1991}) 18... Ng6 19. g3 e5 ({Black should play} 19... Qc7 $17) 20. dxc5 (20. d5 $11 {remains equal.}) 20... bxc5 $17 21. Ne1 e4 {[%cal Be5e4,Be4e3][%mdl 32]} 22. f4 $2 {[#]} (22. Qe3 $17) 22... e3 $1 $19 23. Qc2 {[#]} Bxf4 $1 {[%mdl 512]} 24. gxf4 Rd2 ({But not} 24... Nxf4 25. Rxd8 Rxd8 26. Rd1 $17) (24... Rxd1 $19 {and Black stays clearly on top.} 25. Bxd1 Nxf4) 25. Rxd2 $17 exd2 26. Qxd2 {Hoping for Bf1.} Qxe2 27. Qxe2 Rxe2 28. Ba3 Nxf4 {( -> ...Nh3+)} 29. Bxc5 a6 30. Bd6 $2 {[%mdl 8192]} (30. a4 $17) 30... Nh3+ {Precision: White = 27%, Black = 53%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Iturrizaga Bonelli, Eduardo"]
[Black "Barrientos, Sergio E"]
[Result "1-0"]
[ECO "A17"]
[WhiteElo "2663"]
[BlackElo "2463"]
[Annotator "TA"]
[PlyCount "109"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,109,7,10,22,20,28,7,29,10,8,14,14,13,0,0,11,32,27,4,20,14,25,31,25,22,56,52,72,31,62,38,39,42,79,42,97,89,156,95,98,52,74,84,66,76,81,101,161,139,297,288,417,412,397,405,415,398,401,389,394,428,427,407,425,419,419,334,435,429,408,409,662,314,739,687,29977,29978,29978,29979,29979,29979,29980,29981,29976,5393,29967,29968,29968,29969,29969,29972,29970,29971,29970,29974,29973,2018,29975,29976]} 1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 4. Qc2 d6 5. g3 O-O 6. Bg2 e5 7. O-O {LiveBook: 4 Games} Bxc3 {A22: English Opening: 1...e5 2 Nc3 Nf6} 8. Qxc3 a5 $146 ({Predecessor:} 8... Re8 9. d3 Nc6 10. b4 Bg4 11. b5 Bxf3 12. exf3 {½-½ (35) Iturrizaga Bonelli,E (2625)-Pena Gomez,M (2462) Linares 2015}) 9. b3 (9. d4 $5 {[%cal Rd4e5]}) 9... Re8 {The position is equal.} 10. Bb2 (10. d4 $5 {[%cal Rd4e5]}) 10... Nc6 11. d3 {[%cal Bd2d3,Bd3d4,Bd4d5][%mdl 32]} Bg4 12. Rfe1 Qd7 13. a3 Bh3 (13... Bxf3 $5 14. Bxf3 Nd4 $11) 14. Bh1 Qg4 15. e4 Qh5 16. d4 Bg4 {Threatening ...Bxf3.} 17. d5 Ne7 18. Nd2 c6 19. b4 Rec8 20. Qb3 a4 21. Qd3 cxd5 22. cxd5 Qg6 23. Nc4 {aiming for Nb6.} Rd8 (23... Nfxd5 $1 $14 24. Bg2 Bh3) 24. Qe3 $16 Nd7 ({Better is} 24... b5) 25. Na5 (25. Bg2 $142) 25... f5 26. Nxb7 Rdb8 {Hoping for ...f4.} 27. Na5 $1 {[%cal Ra5c6]} Rxa5 28. bxa5 {And now Bc3 would win.} Rxb2 29. Rab1 {[#]} Rxb1 (29... f4 $1 $16 {[%mdl 512]} 30. Qa7 (30. gxf4 Bd1+) 30... Rc2) 30. Rxb1 $18 Nc5 $2 {[#]} (30... Qe8 $16 {is a better defense.}) 31. a6 $1 {[%cal Ra6a7][%mdl 512]} Nc8 (31... Nxa6 {was worth a try.} 32. Qa7 fxe4) 32. Rb8 f4 {[#]} 33. Qxc5 $1 {[%mdl 512]} dxc5 34. a7 $1 fxg3 35. hxg3 Qh6 {[#]} 36. Rxc8+ $1 {[%mdl 512]} Bxc8 37. a8=Q Qa6 38. Qb8 c4 39. Qc7 h6 40. Bf3 Bh3 {Black hopes to continue with ...Qc8.} 41. Be2 Qb5 (41... Qc8 $142 42. Qxc4 Qxc4 43. Bxc4 g5) 42. Qxc4 (42. Bxc4 $142 Qe8 43. Be2) 42... Qb2 $2 (42... Qb1+ 43. Kh2 Bd7 44. d6+ Kh7) 43. g4 {Strongly threatening d6+.} h5 44. d6+ {[%cal Bd5d6,Bd6d7][%mdl 32]} Kh7 45. Qd3 Qc1+ 46. Qd1 Qc8 47. d7 Qd8 48. Qd6 (48. Qd5 $142 Bxg4 49. Bxg4 hxg4 50. Qf7 Kh6 51. Qe8 Qa5 52. Kg2 Qe1 53. Qe6+ g6 54. Qxe5) 48... hxg4 49. Qxe5 Qxd7 50. Qh5+ Kg8 51. Bc4+ Kf8 52. Qh8+ Ke7 53. Qxg7+ Kd8 54. Qxd7+ Kxd7 55. Bf1 {Precision: White = 68%, Black = 25%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Cordova, Emilio"]
[Black "Terry, Renato"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2651"]
[BlackElo "2454"]
[Annotator "TA"]
[PlyCount "311"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,311,26,18,33,32,52,47,64,24,48,40,35,37,38,39,48,49,32,38,51,51,56,67,54,47,57,58,69,67,72,81,69,34,44,0,0,-41,-40,-22,0,0,0,0,-7,0,0,-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,91,50,43,0,0,0,0,0,18,18,18,18,72,72,114,95,95,31,223,223,223,201,178,79,38,38,38,24,24,24,487,42,39,37,44,16,16,16,16,16,16,16,17,17,25,25,30,31,41,41,41,41,41,41,41,41,41,41,41,41,41,41,41,41,41,25,41,41,41,41,41,41,41,41,41,41,41,41,41,41,41,41,41,41,41,37,39,37,37,29,28,21,21,21,27,29,28,27,27,25,58,58,58,58,58,58,63,63,63,63,63,63,63,63,63,63,63,63,63,63,63,63,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,65,69,65,71,65,72,65,65,65,65,65,76,81,82,82,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,83,0,83,83,83,83,83,83,83,76,76,76,76,76,76,76,76,76,76,76,76,76,76,76,76,76,29981,29984,29986,29987,29987,76,76,0,29987,29988,29988,29983,29983,29984,29984,29983,29983,29984,29984,29984,29984,29985,29985,29986,29986,29987,29987,29988,29988,29989,29990,29991]} 1. Nf3 Nf6 2. c4 b6 3. g3 Bb7 4. Bg2 g6 5. d4 Bg7 6. O-O O-O 7. d5 e6 {[%cal Re6d5] A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6)} 8. Nc3 d6 (8... exd5 9. cxd5 Re8 10. Nd4 c5 11. dxc6 dxc6 12. Bf4 Nh5 13. Be3 Qd7 14. Nb3 Qe7 15. Qd2 Nd7 {0-1 (70) Inarkiev,E (2732)-Hou,Y (2658) Petropavlovsk Kamchatsky 2016}) 9. Rb1 $146 ({Predecessor:} 9. e4 Nbd7 10. Nd4 Qe8 11. dxe6 Nc5 12. Nd5 Nxd5 13. cxd5 fxe6 {1-0 (44) Maletin,P (2587)-Nozdrachev,V (2485) Voronezh 2015}) 9... Re8 {White is slightly better.} 10. b4 a5 11. a3 axb4 12. axb4 exd5 13. cxd5 Ne4 14. Nxe4 Rxe4 15. e3 Nd7 16. Nd4 Re8 17. Bb2 Ba6 18. Re1 Ne5 $1 19. b5 Bb7 20. Nc6 Nxc6 21. bxc6 Ba6 22. Bxg7 Kxg7 23. Ra1 Qf6 24. Ra4 (24. Ra3 $5 {[%cal Rd1a1]} Bc4 25. Qc1 $11) 24... Bb5 25. Rb4 Ra5 26. Qb3 $1 Ra1 27. Rxa1 Qxa1+ 28. Qb1 Qxb1+ 29. Rxb1 $11 {[%mdl 4096] Endgame KRB-KRB} Bd3 30. Ra1 f5 31. Ra7 Re7 $1 32. f4 Bc4 33. Kf2 h5 34. h3 Kf7 35. Bf3 Kg7 36. Ra4 Bb5 (36... b5 $11 {keeps the balance.} 37. Ra8 Kf6) 37. Rb4 $1 $16 {[%cal Rb4b5]} Bd3 38. g4 hxg4 39. hxg4 fxg4 40. Bxg4 Re4 41. Rb3 Bc2 42. Rc3 Ba4 (42... Bb1 $1 $11) 43. Bf3 $1 {[%cal Rf3e4]} Rb4 44. e4 Kf6 45. Re3 (45. Rc1 $1 $16) 45... g5 $2 (45... Rb2+ $14 46. Kg3 Bb3) 46. e5+ $18 dxe5 47. fxe5+ Ke7 48. Re1 (48. Rd3 $18 {and White stays clearly on top.}) 48... Rf4 $16 {White must now prevent ...g4.} 49. Kg3 {And now Bg4 would win.} Bb3 $1 50. Re3 Bc4 51. Ra3 Rd4 $2 {[%mdl 8192]} (51... Rxf3+ $1 $11 {and Black stays safe.} 52. Rxf3 (52. Kxf3 Bxd5+ 53. Ke3 Ke6 $11) 52... Bxd5) 52. d6+ $2 (52. Ra7 $1 $18 {[%cal Ra7c7]} Bxd5 53. Rxc7+ Ke8 54. Bh5+ Kd8 55. Rd7+ Kc8 56. e6 $1 {[%mdl 512]} Rd3+ 57. Kf2) 52... cxd6 $14 53. Ra7+ Ke6 $1 54. Ra8 Kxe5 55. Bg4 {aiming for c7.} Rd3+ 56. Kf2 Rc3 {Threatens to win with ...Bd5.} 57. c7 Be6 58. Re8 Rxc7 {Strongly threatening ...Rf7+.} 59. Rxe6+ $11 {KRB-KR} Kd5 {...Rc4 is the strong threat.} 60. Rg6 Rc2+ 61. Be2 Kc5 62. Rxg5+ d5 63. Ke3 Rc3+ 64. Bd3 Ra3 65. Rg8 Kd6 66. Kd4 Ra4+ 67. Kc3 Ra3+ 68. Kc2 Kc5 69. Rg4 Ra2+ 70. Kb3 Rd2 71. Kc3 Rh2 72. Rg8 Rh3 73. Rc8+ Kd6 74. Kd2 Rh2+ 75. Be2 Rh3 76. Bd1 Rg3 77. Ba4 Ra3 78. Be8 Rb3 79. Bf7 Rf3 80. Bg8 Rg3 81. Ke2 Rg7 82. Ke3 b5 83. Rd8+ Ke7 84. Ra8 Kd6 85. Kd4 Rg4+ 86. Kc3 Rg7 87. Kb4 Rg2 88. Bh7 Rb2+ 89. Kc3 Rh2 90. Bd3 Rh3 91. Rb8 Kc6 92. Kd2 Rh2+ 93. Be2 Rg2 94. Ke3 Rg3+ 95. Kd4 Rb3 96. Bd3 Rb4+ 97. Kc3 Rh4 98. Bxb5+ Kc5 99. Bf1 Rg4 100. Rc8+ Kd6 101. Be2 Rh4 102. Kd3 Rh3+ 103. Kd4 Rh4+ 104. Ke3 Re4+ 105. Kd3 Ra4 106. Bd1 Rb4 107. Rh8 Kc5 108. Bf3 Rb3+ 109. Ke2 Rb2+ 110. Ke3 Rb3+ 111. Kf4 Kd4 112. Rh1 Rc3 113. Rb1 Ra3 114. Be2 Kc5 115. Rc1+ Kd6 116. Bb5 Rb3 117. Rc6+ Ke7 118. Rb6 Rb1 119. Ke5 {White wants to mate with Rb7+.} Re1+ 120. Kxd5 Rh1 121. Bd3 Rh5+ 122. Kd4 Rg5 123. Be4 Rh5 124. Ra6 Rg5 125. Bd5 Rh5 126. Re6+ Kd7 127. Rf6 Ke7 128. Re6+ Kd7 129. Kc5 Rf5 130. Rh6 Ke7 131. Rg6 Rh5 132. Kc6 Rf5 133. Re6+ Kf7 134. Rd6+ Kg7 135. Kd7 Re5 136. Bc4 Re4 137. Be6 Re5 138. Ke7 Kg6 139. Rd4 Kg5 140. Kf7 Ra5 $2 {[%mdl 8192]} (140... Re3 $16) 141. Rg4+ $1 Kh5 142. Kf6 Ra8 143. Rg5+ $2 (143. Rc4 {mates} Ra6 144. Rc8 Rxe6+ 145. Kxe6 Kg4 146. Rf8 Kg5 147. Rf5+ Kg4 148. Kf6) 143... Kh4 $16 144. Rg4+ (144. Rg7 $5 {[%cal Rg7g4]} Ra4 145. Bc8 $14) 144... Kh5 145. Rd4 {White mates.} Ra6 146. Rd5+ Kh6 147. Rd8 {[%cal Rd8h8]} Ra7 148. Rd3 {[%cal Rd3h3]} Ra5 149. Rg3 Rb5 150. Rg8 {[%cal Rg8h8]} Rb7 151. Rg6+ Kh5 152. Rg5+ Kh4 {[#]} 153. Rg4+ $1 Kh5 154. Ra4 Rb6 155. Ra8 {[%cal Ra8h8]} Kh4 {[#]} 156. Ra3 $1 {Precision: White = 75%, Black = 68%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Kovalyov, Anton"]
[Black "Pulvett Marin, Daniel"]
[Result "1/2-1/2"]
[ECO "D34"]
[WhiteElo "2643"]
[BlackElo "2437"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,65,39,135,90,100,93,104,106,89,69,74,67,72,79,65,72,68,70,92,13,12,16,44,27,35,41,47,46,47,47,47,47,47,47,47,47,47,47,47,44,45,45,47,39,39,39,50,50]} 1. c4 e6 2. g3 Nf6 3. Bg2 d5 4. Nf3 c5 5. cxd5 exd5 6. d4 Nc6 7. O-O Be7 8. Nc3 O-O 9. dxc5 d4 10. Na4 Bg4 ({Better is} 10... Bf5 $1 $14) 11. a3 {D34: Tarrasch Defence: 6 g3 Nf6 7 Bg2 Be7} Ne4 12. b4 {And now b5 would win.} Bf6 13. Bb2 {White is better.} Re8 $146 ({Predecessor:} 13... Qe7 14. b5 Na5 15. Bxd4 Bxd4 16. Qxd4 Nb3 17. Qe5 Rfe8 18. Qxe7 Rxe7 {½-½ (64) Chashchev,S (2311)-Kozlitin,O (2229) Krasnodar 2001}) 14. h3 Bxf3 15. exf3 Nc3 16. Bxc3 dxc3 17. Rc1 Qd2 {With the idea ...Rad8.} 18. b5 {[%cal Bb4b5,Bb5c6,Bc6c7][%mdl 32]} Na5 19. f4 (19. Rc2 $16 Qxd1 20. Rxd1) 19... Rad8 $11 20. c6 bxc6 21. bxc6 Qxd1 22. Rfxd1 {White is slightly better.} Rxd1+ 23. Rxd1 {Strongly threatening c7.} Rc8 24. Nxc3 $1 Bxc3 {[#]} 25. c7 $1 {[%mdl 512] Rd8+ would kill now.} Bf6 (25... Rxc7 26. Rd8#) 26. Rb1 {[%mdl 1024] Hoping for Rb8. White has compensation.} Nc4 27. Rb8 Nd6 28. Bb7 Rf8 29. Ba6 Be7 30. a4 g6 31. Kf1 Kg7 32. Ke2 Nc8 33. Rxc8 {Precision: White = 82%, Black = 78%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Delgado Ramirez, Neuris"]
[Black "Panesso Rivera, Henry"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "2613"]
[BlackElo "2421"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,89,0,35,41,50,26,31,29,60,36,35,10,9,14,33,24,41,36,36,28,53,46,50,45,45,39,54,5,41,4,10,8,7,2,13,0,10,0,19,19,51,41,68,38,55,40,70,25,77,77,66,92,55,58,220,222,214,218,207,220,214,211,323,309,383,382,331,287,832,693,1383,1381,29977,29978,29978,29979,29975,29979,29979,29980,29972,1579]} 1. e4 c5 2. g3 d5 3. exd5 Qxd5 4. Nf3 Bg4 5. Bg2 Qe4+ (5... Qe6+ 6. Kf1 Nc6 7. h3 Bh5 8. d3 Nf6 9. Nc3 Rd8 10. Kg1 Qc8 11. Kh2 e6 12. Bf4 Be7 13. Re1 O-O 14. Qc1 Nd4 15. Ne5 Nd7 16. g4 Nxe5 17. Bxe5 {1-0 (61) Mamedov,R (2688)-Najer,E (2679) Doha 2016}) 6. Kf1 $1 {B20: Sicilian: Unusual White 2nd moves} Nc6 7. Nc3 Qe6 8. h3 {White is slightly better.} Bf5 $146 ({Predecessor:} 8... Bh5 9. d3 Nf6 10. Be3 c4 11. g4 Bg6 12. Ng5 Qe5 13. d4 {0-1 (24) Belamaric,G (2251)-Orenda,O (2146) Croatia 2010}) 9. d3 (9. Nh4 {feels hotter.} Qd7 10. Nxf5 Qxf5 11. Bxc6+ bxc6 12. d3) 9... Qd7 10. Be3 e6 11. Nh4 Bg6 12. Nxg6 hxg6 13. Ne4 b6 14. h4 Rc8 15. h5 Rxh5 16. Rxh5 gxh5 17. Qxh5 Nf6 18. Qd1 (18. Nxf6+ {is interesting.} gxf6 19. Rd1 Bg7 20. c3 Kf8 21. Kg1) 18... Nxe4 19. Bxe4 g6 20. c3 Bg7 21. Qe2 Ne7 22. Rd1 Nd5 23. Bd2 b5 24. a3 Nf6 25. Bf3 a5 26. Kg1 (26. d4 $5) 26... Kf8 27. c4 a4 28. Be3 Ne8 (28... Kg8 $11) 29. d4 $16 cxd4 30. cxb5 e5 31. Bc6 $36 {[%mdl 2048] White has good play.} Rxc6 $2 (31... Qe6 $1 $14) 32. bxc6 $18 Qxc6 {[#]} 33. Bd2 $1 Kg8 34. Rc1 Qb7 35. Bb4 f5 (35... Bh6 {was worth a try.}) 36. Qc4+ Kh7 37. Qe6 Nf6 38. Rc6 Qb5 $2 (38... d3 39. Bc3 d2 40. Bxd2 Qxb2) 39. Rc7 {[#] Threatening mate with Qxf6.} Nh5 {and the idea ...Qe2 leaves Black hopeful.} 40. Bf8 {Intending Rxg7+! and mate.} Qe2 41. Rxg7+ {White mates.} Nxg7 42. Qe7 {[%csl Gf8][%cal Re7g7]} Qe1+ 43. Kg2 {[%csl Gf8][%cal Re7g7]} Qe4+ 44. Kh2 {[%csl Gf8][%cal Re7g7]} Kh6 45. Bxg7+ {Precision: White = 72%, Black = 25%.} (45. Qxg7+ $142 Kg5 46. Qh8 d3 47. Be7+ Kg4 48. Qh3+ Kf3 49. Qg2+ Ke2 50. f3+ Kd1 51. fxe4) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Pichot, Alan"]
[Black "Fernandez, Fernando"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2577"]
[BlackElo "2416"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,47,8,14,0,27,18,18,8,10,21,4,-8,0,-10,0,0,0,-6,-12,-21,-23,-66,-70,-57,-31,-33,-26,-26,-15,-15,-16,-22,0,0,0,0]} 1. e4 c5 2. Nf3 {[%cal Bg1f3,Bf3d4,Bd4e2,Be2c3,Bc3d5][%mdl 32]} d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nde2 b5 8. Bg5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} (8. Ng3 Qc7 9. Bd3 Be6 10. O-O Nbd7 11. f4 Be7 12. Qf3 O-O 13. Kh1 Qc6 14. f5 Bc4 15. Bg5 Rac8 {1-0 (41) Ragger,M (2697)-Xiong,J (2667) Wijk aan Zee 2017}) 8... Nbd7 9. Nd5 Bb7 10. Nec3 Rc8 11. Be2 Be7 {[%cal Bf8e7,Be7f6,Bf6b2,Bb2c3][%mdl 32]} 12. Bxf6 Nxf6 13. a4 b4 $1 {[%cal Rb4c3]} 14. Nxf6+ Bxf6 15. Nd5 O-O {[#]} 16. a5 $146 Rc5 {aiming for ...Bxd5.} 17. Ra4 Bxd5 $1 18. exd5 e4 19. O-O Bxb2 {[#] And now ...Bc3 would win.} 20. Rxb4 Bc3 21. Rxe4 {The position is equal.} Qxa5 22. Qd3 Rxd5 23. Qxa6 Qxa6 24. Bxa6 {Precision: White = 45%, Black = 70%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Peralta, Fernando"]
[Black "Prasca Sosa, Rafael Felipe"]
[Result "1-0"]
[ECO "D36"]
[WhiteElo "2569"]
[BlackElo "2400"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,87,6,8,9,13,16,9,16,17,42,8,39,37,38,28,46,47,30,24,54,56,65,63,83,91,95,93,47,40,208,213,216,218,253,227,231,242,247,252,442,272,445,367,446,446,349,443,411,381,467,469,468,432,526,525,525,473,629,625,800,791,1260,1239,4814,4814,4814,4770,4578,4133]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 c6 6. Qc2 Na6 {[%cal Bb8a6,Ba6c7,Bc7e6][%mdl 32]} 7. e3 Nc7 8. Bd3 Ne6 9. Bh4 Be7 10. Nge2 g6 11. O-O Nh5 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2)} 12. Bxe7 Qxe7 13. Qd2 O-O {The position is equal.} 14. f3 f5 {[#]} 15. Rab1 $146 ({Predecessor:} 15. e4 fxe4 16. fxe4 dxe4 17. Bc4 Bd7 18. Nxe4 Rxf1+ 19. Rxf1 Rf8 20. Re1 {1-0 (30) Narciso Dublan,M (2551)-Campora,D (2493) Navalmoral 2012}) 15... b6 16. b4 Bb7 17. Rfe1 Rad8 18. a4 Rf7 19. a5 b5 20. Bc2 Nf6 21. Nf4 Ne8 22. Nxe6 Qxe6 {[#]} 23. e4 $1 fxe4 24. fxe4 Nd6 $2 (24... Qd7 $14) 25. exd5 $18 Qg4 26. dxc6 Bxc6 {[#] Hoping for ...Nc4.} 27. Bb3 $1 {[%cal Rb3f7]} Nc4 28. Bxc4 $1 bxc4 29. d5 Rfd7 $2 (29... Bd7 30. Re4 Qh5 31. Rxc4 Rdf8) 30. Ne4 {Black must now prevent Nf6+.} Rf7 $2 (30... Rf8 31. Qd4 Qf5) 31. Qg5 Qxg5 32. Nxg5 Rxd5 33. Nxf7 Kxf7 {[%mdl 4096] Endgame KRR-KRB} 34. Rbd1 Rg5 35. g3 {White is clearly winning.} a6 36. Re3 Kg7 37. Re7+ Kf6 38. Rc7 Bd5 39. Rc5 Ke6 40. b5 axb5 41. a6 {[%cal Ba5a6,Ba6a7][%mdl 32]} Bf3 42. Rxg5 Bxd1 43. a7 Bf3 44. Rxb5 {Precision: White = 86%, Black = 29%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Cruz, Cristhian"]
[Black "Ynojosa Aponte, Felix Jose"]
[Result "1-0"]
[ECO "D44"]
[WhiteElo "2558"]
[BlackElo "2395"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,64,0,0,0,0,0,0,0,0,0,0,-4,-14,0,0,0,0,0,44,0,0,0,0,0,0,0,0,0,5,24,9,0,8,0,106]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. exf6 Bb7 12. g3 c5 13. d5 Bh6 14. Bxh6 Rxh6 15. Bg2 b4 {D44: Semi-Slav: Botvinnik System} (15... Nxf6 16. Nxb5 Qa5+ 17. Nc3 O-O-O 18. Qa4 Qxa4 19. Nxa4 Nd7 20. O-O-O Ne5 21. Nxc5 Bxd5 22. Bxd5 exd5 23. Rhe1 {1-0 (47) Fier,A (2619)-Ali Marandi,C (2473) Dubai 2016}) 16. Ne4 Nxf6 {LiveBook: 6 Games} 17. Qd2 Rh5 $146 ({Predecessor:} 17... Rg6 18. Qe2 Bxd5 19. O-O Nxe4 20. Bxe4 Bxe4 21. Qxe4 Qd5 22. Qh4 Qd4 23. Qh5 {0-1 (37) Stroemmesen,T-Romsdal,T (2204) Narvik 2000}) 18. Qf4 Nxe4 19. dxe6 $1 {[%csl Ge6][%cal Rf4f7] [#]} f5 {aiming for ...Qd6.} (19... f6 $5 20. O-O $8 {[#]} Nxg3 $1 {[%mdl 512]} 21. fxg3 Bxg2 22. Kxg2 Qd5+ 23. Rf3 Qxe6 24. Qxf6 Qxf6 25. Rxf6 O-O-O $11) 20. Rd1 $1 {[%cal Rd1d8]} Qf6 $1 {[%csl LRb2,LRe6]} 21. O-O {Hoping for Qc7.} Rh7 $1 {...Qh6 is the strong threat.} ({Wrong is} 21... Qxe6 $2 22. f3 $18) 22. h4 $1 c3 23. Rfe1 $1 {[%cal Rg2e4]} Qf8 ({Don't go for} 23... cxb2 $2 24. Bxe4 Bxe4 25. Rxe4 $18) 24. bxc3 bxc3 {[%cal Bb4c3,Bc3c2][%mdl 32]} 25. f3 c2 26. Rd7 Rxd7 27. exd7+ Kxd7 {And now ...Nxg3! would win.} 28. fxe4 Bxe4 29. Bxe4 fxe4 30. Qxe4 $11 {KQR-KQR} Re8 31. Qb7+ Kd6 (31... Kd8 $5 {[%cal Re8e1]} 32. Rxe8+ Qxe8 33. Qb8+ Ke7 34. Qe5+ Kd8 35. Qg5+ Kc7 36. Qf4+ Kb6 37. Qf6+ Kc7 38. Qf4+ Kb7 39. Qf3+ Kc7 40. Qf4+ $11) 32. Qa6+ Kd5 (32... Kd7 $11 33. Qb7+ (33. Qxa7+ Kc6 $11) 33... Kd8 34. Qb8+ Kd7 35. Qb7+ (35. Qxa7+ Kc6 $11)) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Bacallao Alonso, Yusnel"]
[Black "Cori Quispe, Kevin Joel"]
[Result "1/2-1/2"]
[ECO "D80"]
[WhiteElo "2554"]
[BlackElo "2390"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,86,21,26,12,19,26,54,43,43,45,82,79,88,55,66,49,45,20,24,16,42,33,60,41,62,60,101,70,96,53,62,48,53,19,42,15,27,0,11,0,45,20,71,79,70,47,50,40,95,96,87,0,0,0,0,0,0,0,0,-5,0,0,0,0,0,0,3,3,3,3,5,5,7]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. e3 Bg7 5. Qb3 c6 6. Nf3 O-O 7. Bd2 dxc4 8. Bxc4 Nbd7 9. O-O {D95: Grünfeld: 4 Nf3 Bg7 5 e3 0-0 6 Qb3} Nb6 (9... b5 $5 {[%cal Rb5c4]} 10. Be2 a5 $14) 10. Be2 Be6 11. Qc2 {White is slightly better.} Bc4 12. Rfd1 Nfd7 $146 ({Predecessor:} 12... Bxe2 13. Nxe2 Qd5 14. Nc3 Qh5 15. e4 Rad8 16. h3 e5 17. dxe5 {½-½ (38) Sbarra,M (2256)-Skembris,S (2475) Milan 2009}) 13. e4 Re8 14. a4 a5 15. Be1 Bxe2 16. Qxe2 Qb8 17. Rac1 Qa7 18. b3 Qa6 19. Qe3 Rac8 20. h3 h6 21. d5 Nf8 22. dxc6 bxc6 23. Ne2 c5 24. Nf4 c4 25. e5 cxb3 {White must now prevent ...g5.} 26. Qxb3 Nc4 27. Qd3 Rc6 28. Qe4 (28. e6 $5) 28... Rc5 (28... e6 $11 {keeps the balance.}) 29. Rd5 $16 Rec8 30. Rxc5 (30. Qd3 $5 {[%cal Rd5c5]} g5 31. Rxc5 Rxc5 32. Nd5 $14) 30... Rxc5 31. Qd4 Qc6 (31... Rc8 $14) 32. Nd3 Ne6 33. Qg4 (33. Qc3 $16 Rd5 34. Qxc4 Qxc4 35. Rxc4 Rxd3 36. Bxa5) 33... Ne3 $1 $11 {[%cal Re3g4] The position is equal.} 34. Rxc5 Nxc5 35. Qd4 Nxd3 36. Qxd3 Nc4 37. Bc3 Qxa4 {[#]} 38. e6 $1 {[%mdl 512]} Bxc3 (38... fxe6 39. Qxg6) 39. exf7+ Kxf7 40. Qxc3 Qd1+ 41. Kh2 Qd6+ 42. g3 Nb6 43. Qxa5 Kg7 {Precision: White = 54%, Black = 36%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Vasquez Schroeder, Rodrigo"]
[Black "Duran Vega, Sergio"]
[Result "1-0"]
[ECO "E10"]
[WhiteElo "2553"]
[BlackElo "2408"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,53,0,-9,-20,-8,-14,22,0,0,-13,5,1,6,18,27,13,88,91,243,224,322,329,411,393,400,374,357,308,298,298,387,387,467,378]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. e3 c5 5. Nc3 Nc6 6. a3 a6 7. b3 b6 8. Bb2 {D40: Queen's Gambit Declined: Semi-Tarrasch with 5 e3} cxd4 9. exd4 Bb7 $146 ({Predecessor:} 9... Be7 10. Rc1 Bb7 11. Be2 O-O 12. O-O Rc8 13. Re1 Re8 14. Bf1 Bf8 15. Ne5 Na5 {0-1 (36) Indjic,D (2350)-Padevsky,N (2435) Stara Pazova 1982}) 10. Be2 Be7 11. O-O O-O {LiveBook: 4 Games} 12. Na4 dxc4 13. bxc4 Rc8 14. Rc1 Na5 15. Ne5 Nd7 16. Nxd7 $1 Qxd7 17. d5 $36 {[%mdl 2048] White is more active.} Qd6 {[%cal Re6d5]} 18. Bd4 ({Much worse is} 18. Qd4 Bf6 $17) 18... exd5 (18... Bd8 $11 {keeps the balance.}) 19. Nxb6 $16 Rcd8 $2 {[#]} (19... dxc4 $16 20. Nxc8 Rxc8) 20. cxd5 $18 Bxd5 (20... Bg5 {keeps fighting.}) 21. Bc5 Qe6 22. Bxe7 Qxb6 23. Bxd8 Rxd8 24. Rb1 Qf6 {With the idea ...Bxg2.} 25. Qa4 Nc6 {and the idea ...Nd4 leaves Black hopeful.} 26. Rfd1 Qe6 {[#]} 27. Rxd5 $1 {[%mdl 512] Precision: White = 45%, Black = 24%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Ramirez, Alejandro"]
[Black "Umetsubo, Cesar Hidemitsu"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2552"]
[BlackElo "2381"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,80,24,37,36,72,68,49,55,106,90,130,130,116,118,126,107,139,79,92,91,87,36,58,52,62,42,51,22,36,0,0,0,0,-16,0,-8,72,71,81,73,90,103,149,117,179,166,709,698,587,597,590,550,556,534,558,449,557,402,396,391,349,358,1183,1191,1393]} 1. c4 e6 2. Nf3 Nf6 3. g3 d5 4. b3 Be7 5. Bg2 O-O 6. O-O Nbd7 7. Bb2 c6 8. d3 a5 9. Nc3 {A14: English Opening: 1...e6 with b3 by White} Nc5 {LiveBook: 9 Games} 10. Rb1 (10. Qc2 Qb6 11. Rac1 Re8 12. Ba3 Ncd7 13. Bb2 Nc5 14. Ba3 Ncd7 15. Bxe7 Rxe7 {½-½ (70) Hera,I (2567)-Malakhatko,V (2526) Bad Homburg 2012}) 10... Qb6 11. Qc2 {White is better.} Rd8 12. d4 $146 ({Predecessor:} 12. e4 Nxd3 13. Na4 Qc7 14. Bxf6 Nb4 15. Be5 Qxe5 16. Nxe5 Nxc2 17. cxd5 cxd5 18. exd5 {1-0 (29) Ilijc,M (2380)-Preker,H Lugano 1982}) 12... Nce4 ({Black should try} 12... Ncd7 $14) 13. Na4 Qa6 14. c5 Nd7 15. Ne5 Nef6 16. f4 Nxe5 17. fxe5 ({White should play} 17. dxe5 Nd7 18. Bd4) 17... Nd7 $16 18. Bh3 Rf8 19. Rbc1 (19. e4 $16) 19... b5 20. Nc3 {[%cal Ba4c3,Bc3d1,Bd1e3,Be3g2,Bg2f4][%mdl 32]} f5 21. Rf3 (21. exf6 $5 Nxf6 22. e4 $16) 21... Qa7 22. Kh1 b4 23. Nd1 a4 24. Rb1 Ba6 25. Ne3 a3 26. Bc1 g6 (26... Bxc5 $11 27. dxc5 Qxc5) 27. Bf1 Rac8 28. Ng2 Nxe5 29. dxe5 Bxc5 30. Bh6 Rfd8 (30... Rf7 $16 {was called for.} 31. Nf4 Bb6) 31. Nf4 $18 Kf7 $2 (31... Be3 32. Bg5 (32. Nxe6 Bxh6 33. Nxd8 Rxd8 $16) 32... Re8) 32. Bh3 {[%cal Bf1h3,Bh3f5,Bf5d3][%mdl 32]} Be3 33. Nxe6 Bxh6 34. Nxd8+ Rxd8 {[#]} 35. Bxf5 $1 {[%mdl 512]} Kg8 (35... gxf5 36. Qxf5+) 36. Qxc6 {Hoping for Qf6.} Bg7 37. Bd3 Bc8 38. e6 {[%cal Be5e6,Be6e7][%mdl 32]} Qe7 39. Rf7 Qd6 $2 (39... Qxe6 40. Qc7 Qxf7 41. Qxd8+ Qf8 42. Qxd5+ Kh8) 40. e7 {[#] White threatens Qxd6 and mate.} Kxf7 {Precision: White = 72%, Black = 45%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Molina, Roberto Junio Brito"]
[Black "Bachmann, Axel"]
[Result "0-1"]
[ECO "E32"]
[WhiteElo "2464"]
[BlackElo "2653"]
[Annotator "TA"]
[PlyCount "156"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,156,16,38,19,28,0,0,5,35,17,18,18,19,24,21,19,24,14,14,0,0,-5,-1,-8,-15,-28,-33,-91,-86,-91,-91,-91,-96,-91,-86,-104,-52,-97,-100,-124,-131,-127,-105,-119,-107,-118,-110,-122,-112,-118,-72,-74,-73,-100,-100,-98,-91,-102,0,-113,-104,-119,-104,-91,-57,-74,-58,-78,-77,-73,-52,-54,-45,-45,-50,-37,-37,-40,-54,-54,-29,-29,0,-56,0,-29,-39,-32,-29,-29,-29,-29,-18,-39,-32,-213,-195,-213,-197,-211,-212,-214,-202,-215,-202,-213,-208,-209,-204,-202,-190,-202,-210,-224,-212,-235,-212,-271,-259,-268,-275,-259,-260,-255,-239,-239,-228,-289,-292,-285,-291,-248,-248,-301,-293,-300,-276,-469,-431,-437,-365,-351,-364,-526,-520,-673,-675]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d6 5. Nf3 c5 6. e3 Nc6 7. dxc5 {E38: Nimzo-Indian: Classical: 4...c5} dxc5 8. Be2 (8. a3 $5 {[%cal Ra3b4]} Bxc3+ 9. Qxc3 $11) 8... Ba5 $146 ({Predecessor:} 8... Qe7 9. O-O O-O 10. b3 Bxc3 11. Qxc3 e5 12. Bb2 Ne4 13. Qc1 Bg4 14. a3 Ng5 15. Nxg5 Qxg5 16. Bxg4 Qxg4 17. Qc2 Rad8 18. Rad1 Qe6 19. Bc3 {½-½ (19) Prudnikova,S (2380)-Bogdanovski,V (2515) Skopje 1993}) 9. O-O {The position is equal.} Bc7 10. Rd1 Qe7 11. a3 O-O 12. b3 h6 13. Bb2 b6 14. Nd2 Bb7 15. Nb5 Be5 16. Nf1 a6 17. Bxe5 Nxe5 18. Nd6 Bc6 19. f4 ({White should play} 19. Rd2 $1 $15) 19... Ng6 $1 $17 {aiming for ...Rfd8.} 20. Ng3 Rad8 $36 {[%mdl 2048] Keeping White busy.} 21. Nde4 Nxe4 22. Nxe4 Nh4 $1 {...e5 is the strong threat.} 23. Bf1 e5 ({Black should try} 23... Nf5 $17 24. Re1 Rd7) 24. Re1 Rfe8 25. fxe5 Qxe5 26. Ng3 Rd6 27. Rad1 Rxd1 28. Qxd1 Qc3 29. Re2 {[#]} Ng6 $1 30. e4 Nf4 31. Rf2 {[#]} Qe5 $1 32. Qg4 Ne6 33. Qf5 Qc7 34. Qg4 Qe5 (34... a5 $17 35. Nf5 Kf8) 35. Nf5 (35. Qf5 $1 $11 {remains equal.} Qc7 36. Qg4) 35... Kf8 ({Inferior is} 35... Qxe4 36. Qxe4 Bxe4 37. Nd6 $16) 36. Bd3 Rd8 37. Bc2 Bd7 38. Qh4 Re8 39. Qg3 Qxg3 40. hxg3 Ng5 (40... g6 $5 {[%cal Rg6f5]} 41. Nxh6 Ng5 $15) 41. Rd2 Bxf5 42. exf5 $15 {[%mdl 4096] Endgame KRB-KRN} Re3 43. Kf2 Rc3 44. Re2 Nh7 45. Bd1 $1 Rd3 (45... Rc1 $5 {[%cal Rc1d1]} 46. Re1 Ra1 $11) 46. Bc2 Rc3 47. Bd1 $1 Rd3 (47... Rc1 $5 {[%cal Rc1d1]} 48. Re1 Rb1 $15) 48. Bc2 Rd4 49. Be4 Nf6 50. Bf3 a5 51. a4 h5 (51... Rd3 $5 {[%cal Rd3b3]} 52. Re3 Rd2+ 53. Ke1 Rd6 $11) 52. Re5 Rd2+ (52... Rd3 $5 53. Re3 $8 Rd2+ 54. Re2 Rd1 $11) 53. Ke3 $2 (53. Re2 $15 Rxe2+ 54. Kxe2) 53... Rb2 $19 54. Kf4 Rxb3 55. Bc6 Rd3 56. Bb5 Rd1 57. Re2 Rd8 58. Re1 Rd4+ 59. Kf3 Rd2 60. Re3 Kg8 61. Re7 Ng4 {And now ...Rf2+ would win.} 62. Rb7 Rf2+ 63. Ke4 Rxg2 64. Kf3 Rf2+ 65. Ke4 Nf6+ 66. Ke3 Rxf5 67. Rxb6 g5 68. Bc6 Re5+ 69. Kd3 Re6 70. Rb8+ Kg7 71. Rc8 Rd6+ 72. Ke2 Rd4 73. Bb5 Re4+ 74. Kf1 $2 (74. Kf3 {keeps fighting.}) 74... Re3 75. Rxc5 Ne4 76. Rd5 Rf3+ ({Don't do} 76... Rxg3 77. Bc6 $19) 77. Ke1 (77. Kg2 $142 Rxg3+ 78. Kh2) 77... Rxg3 78. Rd4 f5 {Precision: White = 59%, Black = 60%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Tang, Andrew"]
[Black "Bruzon Batista, Lazaro"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2461"]
[BlackElo "2650"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,118,13,16,5,3,0,32,24,19,27,22,20,15,23,20,12,16,16,20,22,15,16,35,8,12,0,20,16,6,0,0,-19,-19,-20,-21,-23,-16,-19,-16,-16,-5,-8,-6,-34,-11,-7,-7,-8,-8,-8,-8,-11,-8,-15,-5,-5,-8,-6,-5,-5,-5,-111,-86,-79,-85,-182,-181,-285,-283,-261,-238,-192,-241,-380,-376,-293,-237,-283,-294,-304,-279,-219,-303,-286,-283,-245,-216,-137,-137,-393,-256,-791,-791,-791,-452,-756,-439,-773,-297,-209,-71,-71,-72,-96,-74,-185,0,0,0,0,0]} 1. d4 e6 2. Bf4 Nf6 3. e3 b6 4. Nf3 Be7 5. h3 c5 (5... O-O 6. Nbd2 c5 7. c3 cxd4 8. exd4 Ba6 9. Bxa6 Nxa6 10. O-O Qc8 11. a4 Nc7 12. Re1 {½-½ (32) Li,C (2722)-Wojtaszek,R (2734) Chartres 2017}) 6. Be2 {A47: 1 d4 Nf6 2 Nf3 b6: Torre, London and Colle Systems} O-O 7. O-O cxd4 $146 ({Predecessor:} 7... Bb7 8. Nbd2 d6 9. a4 Ne4 10. Nxe4 Bxe4 11. Bd3 Bb7 12. c3 Nc6 13. Re1 {1-0 (30) Schoetzig,A (2217)-Neukirch,D (2270) Germany 2010}) 8. Nxd4 {White is slightly better.} Bb7 9. Nb5 Ne8 10. c4 d6 11. Bf3 Nc6 12. Nd2 a6 13. Nc3 Qc7 14. Rc1 Ne5 15. Bxb7 Qxb7 16. Bxe5 dxe5 17. Qf3 Ra7 (17... Qa7 {is more complex.} 18. c5 Bxc5 19. Nc4 Rd8 20. a3 Bd6) 18. Qxb7 Rxb7 19. Nf3 f6 20. Ne4 Nd6 21. Nxd6 Bxd6 22. Rfd1 Be7 23. a4 Rc8 24. b3 e4 25. Nd4 Kf7 26. Kf1 f5 27. Ne2 h5 28. g4 g6 29. gxf5 gxf5 30. Nf4 h4 31. Ke2 Rbc7 32. f3 exf3+ 33. Kxf3 Rg8 34. Rg1 {Threatens to win with Rxg8.} Rcc8 35. e4 (35. Rcd1 $11) 35... Bc5 $1 $17 {[%cal Rc5g1]} 36. Rxg8 Rxg8 {[%mdl 4096] Endgame KRB-KRN} 37. Ne2 (37. exf5 $17 {was called for.} Rg3+ 38. Ke2) 37... Rd8 $19 {Strongly threatening ...Rd3+.} 38. Nf4 (38. exf5 {was worth a try.} exf5 39. Nf4) 38... Rd2 $1 {[%csl Gc5][%cal Rd2f2]} 39. Rf1 {[#]} a5 $1 40. exf5 exf5 41. Ng2 (41. Nd5 {was the only defense.} Kg6 42. Nf4+ Kf6 43. Nd5+ Kg5 44. Nf4) 41... Kf6 42. Nxh4 Kg5 43. Ng2 Rd3+ 44. Ke2 Rxh3 ({Don't play} 44... Rxb3 45. Nf4 $19) 45. Rf3 Rh2 46. Rg3+ Kf6 47. Kd3 Bd6 48. Rg8 Rh3+ 49. Kd4 $2 {[%mdl 8192]} (49. Kc2 $17) 49... Rxb3 50. Nh4 $2 (50. Kd5 Rg3 51. Rxg3 Bxg3 52. Kc6) 50... Bc5+ 51. Kd5 Rd3+ 52. Kc6 Rh3 53. Rg6+ (53. Ng2 $142 Rf3 54. Rb8) 53... Ke5 $2 (53... Kf7 54. Rh6 f4) 54. Rh6 Rd3 (54... Rc3 $19 {is more deadly. ...f4 is the strong threat.} 55. Rh5 Rxc4 56. Nxf5 Kf6) 55. Ng6+ $17 Kd4 {aiming for ...Rf3.} 56. Rh4+ Kc3 57. Nf4 {[#]} (57. Kb5 $17 {was forced.}) 57... Rd6+ $2 ({And not} 57... Kxc4 58. Nxd3+ Kxd3 59. Rf4 $16) (57... Bf2 $1 $19 {[%cal Rf2h4]} 58. Rh1 Rf3) 58. Kb5 $11 Kd2 59. Nd5 Re6 {Precision: White = 49%, Black = 63%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Vazquez, Guillermo"]
[Black "Cori, Jorge"]
[Result "1/2-1/2"]
[ECO "D76"]
[WhiteElo "2443"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,107,-8,-10,0,0,-7,-25,-30,-33,29,-4,-4,-4,-8,-12,0,0,10,0,45,68,56,46,61,60,58,74,72,79,85,15,10,15,21,20,22,31,31,24,44,35,43,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d5 5. cxd5 Nxd5 6. Nf3 Nb6 7. O-O O-O 8. Nc3 Nc6 9. e3 Re8 10. Nh4 {D76: Fianchetto Grünfeld: Main Line with 7...Nb6} e5 11. d5 Nb4 12. a3 Na6 13. Qc2 {LiveBook: 3 Games} Qe7 {[#]} 14. Rb1 $146 ({Predecessor:} 14. e4 c6 15. dxc6 bxc6 16. Nf3 Nc5 17. Bg5 Qe6 {½-½ (32) Wang,H (2737)-Li,C (2693) China 2013}) 14... e4 15. Qxe4 (15. Nxe4 {is more complex.} Nxd5 16. f4 f5 17. Ng5 c6 18. b4) 15... Qxe4 16. Nxe4 h6 ({Black should play} 16... Bg4 $15) 17. Nc3 g5 18. Nf3 Bf5 19. e4 Bg6 20. Nd2 $36 {[%mdl 2048] Black is under pressure.} Nc5 21. b4 Nca4 (21... Nd3 $5 {[%cal Rg7c3]} 22. Nb5 Red8 $11) 22. Nxa4 Nxa4 23. Rb3 Rad8 24. f4 Bc3 25. f5 Bd4+ 26. Kh1 Bh5 27. Bf3 (27. Nf3 $16 Bf6 28. Re3) 27... Bxf3+ $11 28. Rfxf3 g4 29. Rf4 h5 30. h3 Be5 31. Rf1 gxh3 32. Nf3 Bc3 33. Bd2 Bxd2 {The position is equal.} 34. Nxd2 c6 35. Rd3 cxd5 36. exd5 Nb6 37. d6 Re2 38. g4 hxg4 {[#] Strongly threatening ...Nd7.} 39. Rg1 Kg7 40. Rxg4+ Kf6 41. Re4 Rxe4 42. Nxe4+ {[%mdl 4096] Endgame KRN-KRN} Ke5 43. Nc5 Rxd6 44. Rxd6 Kxd6 45. Nxb7+ {KN-KN} Kc7 46. Na5 Nd5 47. Kh2 Ne3 48. Kxh3 Nxf5 49. Kg4 Nd4 50. Kg5 Nc2 51. b5 Nxa3 {Hoping for ...Kb6.} 52. Nc6 Nxb5 {[#]} 53. Nxa7 $1 {[%mdl 512]} Nxa7 54. Kf6 {Precision: White = 76%, Black = 61%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Martinez Romero, Martin"]
[Black "Sevian, Samuel"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "2427"]
[BlackElo "2601"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,69,19,3,19,9,9,2,5,11,10,7,8,9,12,7,10,8,10,8,8,0,9,21,20,2,48,35,41,38,30,16,46,0,0,0,0,0,7,-41,-13,-29,-10,-29,-39,-70,-91,-76,-72,-79,0,0,43,36,37,40,42,54,53,29]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 d6 7. c4 Bg4 {C84: Closed Ruy Lopez: Unusual White 6th moves} (7... O-O 8. h3 Nd4 9. Nxd4 exd4 10. Nd2 Nd7 11. f4 c5 12. Nf3 Rb8 13. Bd2 b5 14. Bb3 bxc4 15. dxc4 {0-1 (36) Sjugirov,S (2669)-Svidler,P (2729) Sochi 2015}) 8. Be3 O-O 9. h3 Bxf3 {The position is equal.} 10. Qxf3 Nd4 $146 ({Predecessor:} 10... Nd7 11. Nc3 Nd4 12. Bxd4 exd4 13. Nd5 c6 14. Nxe7+ Qxe7 15. b4 a5 16. a3 axb4 17. axb4 Ra7 18. Bb3 Rfa8 19. Rab1 {½-½ (19) Darga,K-Szabo,L Beverwijk 1967}) 11. Bxd4 exd4 12. Nd2 c6 13. Qe2 Nd7 {[%cal Bf6d7,Bd7c5,Bc5e6][%mdl 32]} 14. f4 b5 15. Bd1 Rb8 16. Qf2 Bf6 17. cxb5 Rxb5 18. Rb1 Nc5 19. Bc2 Qb6 20. Nc4 Qb8 21. Qf3 Be7 22. b3 (22. a3 $5 {[%cal Rb2b4]}) 22... Ne6 23. Rbe1 d5 24. Ne5 Qc7 25. Ng4 Bb4 26. Re2 dxe4 27. dxe4 h5 28. Nf6+ gxf6 {[#]} 29. e5 $1 {[%mdl 512]} fxe5 30. fxe5 {[#] Strongly threatening Qd3.} Rxe5 ({Black should play} 30... Rd8 $1 $17 31. Qf5 d3 32. Bxd3 {[#]} Rxd3 $1 {[%mdl 512]} 33. Qxd3 Rxe5) 31. Qd3 $1 $11 {[%csl Gc2][%cal Rd3h7]} f6 {aiming for ...Nf4!} 32. Rxe5 {White is slightly better.} fxe5 33. Qg6+ Qg7 34. Qxe6+ Kh8 35. Rxf8+ {Precision: White = 53%, Black = 54%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Valderrama Quiceno, Esteban Alb"]
[Black "Fier, Alexandr"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2413"]
[BlackElo "2576"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,68,-3,12,-48,-33,-30,-12,-31,0,-12,-14,-21,-17,-19,57,-14,-14,-20,-24,-58,-61,-126,-120,-122,-106,-109,-106,-167,-172,-176,-199,-236,-133,-265,-258,-251,-230,-228,-228,-217,-217,-224,-220,-252,-245]} 1. Nf3 Nf6 2. g3 d5 3. Bg2 g6 4. O-O Bg7 5. c4 O-O 6. d4 dxc4 7. Na3 c3 8. bxc3 c5 9. e3 Nc6 10. Bb2 Qb6 {D77: Fianchetto Grünfeld: 6 0-0: Replies other than 6...c6} 11. Qe2 Bf5 12. Rfd1 Rfd8 13. h3 Rac8 {LiveBook: 3 Games} 14. Ne1 ({Better is} 14. Ng5 $11) 14... Be4 $15 {[#]} 15. Bf1 $146 ({Predecessor:} 15. f3 Bf5 16. Nc4 Qa6 17. Bf1 Be6 18. Rdc1 {½-½ (51) Cordova,E (2627)-Grandelius,N (2641) Linares 2016}) 15... Na5 16. c4 e6 17. dxc5 Qxc5 18. Rxd8+ Rxd8 19. Rd1 Rc8 (19... Rxd1 $11 20. Qxd1 Ne8 21. Bxg7 Kxg7 22. Qd4+ Qxd4 23. exd4 Nd6) 20. Nd3 (20. Nb5 $1 $14) 20... Qe7 $11 21. Ne5 a6 22. Qd2 Nc6 23. Nc2 (23. Nxc6 $15 Bxc6 24. Bg2) 23... Nxe5 $17 24. Bxe5 {[#]} Bf3 $1 25. Bxf6 Qxf6 26. Re1 (26. Be2 $17 {keeps fighting.}) 26... Be4 $19 {( -> ...Qf3)} 27. Bg2 Bxg2 ({Don't play} 27... Rxc4 28. Na3 $15) 28. Kxg2 {[#]} Rxc4 (28... Qb2 $1 $19 29. Qd7 Rxc4 30. Qe8+ Bf8) 29. Rb1 (29. Rd1 $17) 29... Qf5 30. Na3 Rc3 31. Rb3 Rxb3 32. axb3 Qd5+ 33. Qxd5 exd5 34. Nc2 a5 {Precision: White = 40%, Black = 60%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Valdes Romero, Leonardo"]
[Black "Flores, Diego"]
[Result "0-1"]
[ECO "A37"]
[WhiteElo "2407"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,76,14,0,-24,-36,-44,-18,-44,-37,-57,-64,-86,-60,-82,-83,-127,-124,-133,-133,-132,-131,-135,-130,-216,-177,-162,-169,-162,-151,-200,-196,-207,-200,-218,-207,-201,-200,-401,-409,-443,-469,-968,-892,-828,-825,-12833,-12833,-12835,-12836,-12843,-12843,-12843,-12843,-29976,-29975,-12840,-12840,-12841,-12841,-12841,-12841,-29997,-29998]} 1. Nf3 g6 2. c4 Bg7 3. Nc3 c5 4. g3 Nc6 5. Bg2 e6 6. d4 cxd4 7. Nb5 d5 8. cxd5 {A37: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3} Qa5+ {LiveBook: 96 Games} (8... exd5 9. O-O Nge7 10. Bf4 O-O 11. Qd2 Nf5 12. g4 Nfe7 13. h3 a6 14. Nd6 h6 15. Nxc8 Rxc8 16. Bxh6 f5 17. Bxg7 Kxg7 18. Nxd4 {0-1 (62) Grischuk,A (2754)-Carlsen,M (2857) chess.com INT 2016}) 9. Bd2 (9. Kf1 $5 {[%cal Rb5d6]} Qxb5 10. dxc6 Qxc6 11. Nxd4 $11) 9... Qxb5 10. dxc6 {Black is slightly better.} Ne7 {[%cal Bg8e7,Be7d5,Bd5c3][%mdl 32]} 11. cxb7 Bxb7 12. O-O $146 ({Predecessor:} 12. a4 Qb6 13. a5 Qb5 14. Ra4 Bd5 15. Rb4 Qd7 {0-1 (60) Troyke,C (2356)-Eisenbeiser,A (2229) Deizisau 2004}) 12... O-O 13. a4 Qd7 14. b4 Nd5 15. Rc1 Rac8 16. Qb3 Nc3 17. Bxc3 Rxc3 18. Rxc3 dxc3 19. Rc1 (19. b5 $17 {was called for.}) 19... Bd5 20. Qc2 Qb7 21. b5 Be4 22. Qb3 Rd8 23. Ne1 Bxg2 $1 24. Nxg2 Qe4 $1 {[%cal Re4e2]} 25. Ne3 Rd2 26. Rc2 $2 (26. Qc4 {was the only chance.} Qxc4 27. Nxc4 Rxe2 28. Ne3) 26... Bd4 $1 $19 {[%cal Rd4e3]} 27. Rxd2 cxd2 28. Nd1 (28. Qd1 $142 Bxe3 29. fxe3 Qxe3+ 30. Kf1) 28... Qxe2 29. a5 e5 {[%cal Be6e5,Be5e4,Be4e3][%mdl 32] And now ...e4 would win.} 30. Kg2 e4 31. b6 axb6 32. axb6 {[#]} Bxf2 $1 {[%mdl 512]} 33. Nxf2 e3 34. b7 Qxf2+ 35. Kh3 {[#]} Qf1+ $1 36. Kh4 h6 37. b8=Q+ Kh7 {( -> ...g5+)} 38. Qd6 g5+ {Precision: White = 24%, Black = 91%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Fernandez Reyes, Lisandro"]
[Black "Shabalov, Alexander"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2402"]
[BlackElo "2556"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,114,-15,-11,-14,-20,-19,-5,-10,-6,-9,-15,-8,0,-14,-11,-11,0,0,18,0,0,0,0,0,0,0,0,0,0,0,14,-13,0,-4,0,-10,0,0,0,0,0,0,0,0,0,0,0,-65,0,-21,0,0,0,0,-4,-52,0,0,0,-21,-21,-89,-89,-95,-98,-150,-149,-116,-119,-131,-133,-131,-87,-94,-84,-59,-59,-65,-58,-48,-33,-43,-67,-106,-20,-20,0,0,0,0,0,0,-28,-163,48,-16,-68,-98,0,0,0,0,0,-139,0,0,29999]} 1. d4 g6 2. Nc3 Bg7 3. g3 (3. e4 d6 4. h4 h5 5. Be3 c6 6. Qd2 b5 7. f3 Nd7 8. Nh3 Nb6 9. Ng5 Nf6 10. a4 Nc4 11. Bxc4 bxc4 12. O-O-O Rb8 13. e5 Nd5 14. Nxd5 cxd5 15. exd6 exd6 16. Rde1 O-O {1-0 (61) Sethuraman,S (2640)-Bachmann,A (2593) Berlin 2015}) 3... d5 4. Bg2 Nf6 5. Bg5 c6 {LiveBook: 5 Games} 6. Bxf6 {A40: Unusual replies to 1 d4} exf6 7. Nf3 f5 8. O-O Nd7 $146 ({Predecessor:} 8... O-O 9. b4 Be6 10. e3 Nd7 11. Na4 b6 12. c3 Rc8 {½-½ (35) Hereklioglu,S (1801)-Davidson,L (1453) Prague 2016}) 9. e3 O-O 10. Ne2 Re8 11. b3 Nf6 12. c4 dxc4 13. bxc4 c5 14. Rb1 Qc7 15. Qb3 b6 16. Rfd1 Bb7 17. d5 Ne4 18. Nd2 Nd6 19. Nc3 Ba6 20. Bf1 h5 21. Nf3 Bf6 22. h4 Re7 23. Rdc1 Rae8 24. Ne2 Ne4 25. Rd1 Bc8 26. Nf4 Qd6 {White should prevent ...Nc3.} 27. Rd3 Bd7 28. Qa3 {[#]} (28. Nd2 $11) 28... Rc8 (28... b5 $1 $15 {[%mdl 512]}) 29. Qa6 Rc7 30. Rc1 Bg7 31. Rc2 Re8 32. Qa3 Rb8 ({Black should try} 32... b5 $15) 33. Nd2 $11 Nf6 (33... Be5 {seems wilder.} 34. Nf3 Bf6 35. Nd2 Rcb7 36. Rc1 Qf8) 34. Nf3 Rcc8 35. Rd1 ({Not} 35. Qxa7 $2 Ra8 $19) (35. Rb3 $11) 35... a6 $17 {[%cal Ba7a6,Ba6b5,Bb5b4][%mdl 32]} 36. Ng5 ({Wrong is} 36. Qxa6 $2 Ra8 $19) 36... b5 37. cxb5 (37. Rb1 $142) 37... axb5 38. Qc1 Be8 39. Nf3 Ne4 40. Bd3 {intending Bxe4.} b4 41. Bxe4 fxe4 42. Nd2 Ba4 $1 {Strongly threatening ...c4.} 43. Nxe4 Qe7 (43... Qe5 $5 {[%cal Re5e4]} 44. Rxc5 Rxc5 45. Nxc5 Bxd1 46. Qxd1 Rc8 $11) 44. Rc4 {Hoping for d6.} Bxd1 45. Qxd1 Qa7 46. Rc2 {[#]} Qa4 ({Black should play} 46... c4 $1 $17 {...Rd8 is the strong threat.} 47. d6 (47. Nd6 Rc5 $17) 47... c3) 47. Nd6 $1 $11 Rd8 $36 {[%mdl 2048] [#] Black is more active.} 48. Nxf7 $1 {[%mdl 512]} Kxf7 49. d6 $1 {Threatening mate with Qd5+.} Kg8 {aiming for ...Qc6.} 50. Qd5+ Kh7 51. Rxc5 (51. Qd3 $11 {and White is okay.} Rxd6 52. Qxd6 Qxc2 53. Qxb8 Qb1+ 54. Kg2 Qe4+ 55. Kh2) 51... Qe8 $2 (51... Rbc8 $19 {And now ...Rxc5 would win.} 52. Rxc8 Rxc8) 52. Qd3 (52. Rc7 $14) 52... Rb6 53. Rxh5+ $1 {[#]} Bh6 ({Better is} 53... Kg8 $1 $17 54. Rd5 Bf8) 54. Re5 $1 {[%cal Re5e8]} Qxe5 55. Qxg6+ Kh8 56. Qxh6+ Kg8 57. Ne6 $1 {Threatens to win with Qg6+.} Qb5 $2 {[%mdl 40960] Precision: White = 62%, Black = 49%. . An unexpected result.} (57... Rbxd6 $11 58. Qg6+ Kh8 59. Qh6+ Kg8 60. Qg6+ Kh8 61. Qh6+ Kg8) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Mosquera, Miguel"]
[Black "Erenburg, Sergey"]
[Result "0-1"]
[ECO "B19"]
[WhiteElo "2391"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 30,91,17,10,16,8,29,22,14,0,3,3,50,0,0,0,0,0,-10,-13,84,-6,-6,-6,-7,-75,-83,-83,-83,-89,-93,-606,-606,-606,-594,-597,-597,-583,-559,-689,-681,-670,-567,-550,-550,-790,-787,-844,-837,-1300,-1291,-1223,-1216,-1013,-960,-1638,-1542,-5072,-5065,-5057,-4134,-29966,-29960,-29991]} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. O-O-O Bd6 13. Ne4 Nxe4 14. Qxe4 Nf6 {B19: Classical Caro-Kann: 4...Bf5 main line} 15. Qe2 Bc7 16. c4 {LiveBook: 10 Games} b5 {The position is equal.} 17. Kb1 bxc4 18. Qxc4 O-O $1 19. Qxc6 Rb8 20. Rc1 Nd5 {[#]} 21. Qc2 $146 ({Predecessor:} 21. Ka1 Qf6 22. Qc2 {1-0 (56) Perez Ponsa,F (2586)-Andreikin,D (2743) ICC INT 2016}) 21... Rb5 22. g4 Qe7 {And now ...Rfb8 would win.} 23. Qd3 Rfb8 24. Rc2 Ba5 {[#]} (24... Bd6 $11) 25. Rhc1 (25. Bxa5 $1 $16 Rxa5 26. Rhc1) 25... Qb7 $1 $11 {[%cal Rb5b2]} 26. Rc8+ $1 Bd8 27. Rxb8 (27. b3 $11) 27... Rxb2+ $1 $17 28. Ka1 {[%cal Rb8d8]} Qxb8 29. Ne5 {Hoping for Nc6.} Bg5 $40 {[%mdl 128] Black is out for blood.} 30. Bxg5 $4 {[%mdl 8192] [#]} (30. Rc8+ $17 Qxc8 31. Kxb2) 30... Rxa2+ $3 $19 {[%mdl 512]} 31. Kxa2 Nb4+ 32. Ka3 Nxd3 33. Nxd3 Qd6+ 34. Nc5 {White wants to play Be3.} hxg5 {[%mdl 4096] Endgame KQ-KRN} 35. Rc4 Qd5 36. Kb4 Qf3 37. d5 exd5 38. Rd4 Qxf2 39. Kc3 f5 40. Nd3 Qf3 41. gxf5 a5 42. Ra4 Qxf5 43. Kd2 g4 {[%cal Bg5g4,Bg4g3][%mdl 32]} 44. Nf4 g3 45. Ke3 Qc2 46. Kd4 {Precision: White = 24%, Black = 82%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.11"]
[Round "3"]
[White "Sanchez, Sebastian Felipe"]
[Black "Mekhitarian, Krikor Sevag"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2388"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,87,18,12,-24,-28,-19,0,-9,0,-22,-22,-17,-18,-13,-7,-3,0,-18,-19,-32,-14,-28,0,0,0,-35,-12,-8,-11,0,0,-37,-42,-36,-17,-16,0,0,0,0,8,7,20,15,48,9,20,4,3,7,12,10,33,33,46,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O Nbd7 8. Qc2 {E11: Bogo-Indian} Ne4 (8... c6 9. Rd1 b6 10. b3 a5 11. Bc3 Ne4 12. Ne5 Nxe5 13. Bxe4 f5 14. Bxd5 exd5 15. dxe5 f4 16. cxd5 cxd5 17. Bd4 Ba6 18. Qc6 Bxe2 {½-½ (28) Ding,L (2773)-Giri,A (2785) Moscow 2017}) 9. Nc3 Nxd2 10. Nxd2 c6 11. e4 dxc4 12. Nxc4 Nb6 {LiveBook: 8 Games} 13. Ne2 Nxc4 14. Qxc4 Qb6 (14... e5 $5) 15. b3 $146 ({Predecessor:} 15. Rab1 a5 {0-1 (42) Wells,P (2431)-Fressinet,L (2672) London 2016}) 15... a5 16. Rfd1 e5 17. dxe5 Bc5 18. Rf1 $1 Be6 19. Qc2 g5 20. Rac1 Ba3 21. Rcd1 Rad8 {[%mdl 1024] Black has compensation.} 22. Nc1 Rd4 23. Ne2 Rdd8 24. h3 a4 25. bxa4 Qb2 26. Qxb2 Bxb2 27. Rb1 Rd2 28. Nc1 $1 Rfd8 29. Nb3 Rc2 (29... Bxb3 $5 30. axb3 R8d3 $11) 30. Na1 Bxa1 (30... Rcd2 $5 31. Nb3 $8 Bxb3 32. axb3 R8d3 $11) 31. Rxa1 Bxa2 32. Rfd1 Rxd1+ 33. Rxd1 $11 {[%mdl 4096] Endgame KRB-KRB} c5 34. Rd8+ Kg7 35. Rd7 Rc1+ 36. Kh2 b6 37. Bf3 Be6 38. Rb7 Rc4 39. Bg4 (39. Rxb6 {feels hotter.} Rxa4 40. Rc6 Rc4 41. Kg2 h6 42. Bd1) 39... Bxg4 {The position is equal.} 40. hxg4 Rxe4 41. Rxb6 Rxa4 42. Rc6 Rxg4 43. Rxc5 Re4 44. f3 {Precision: White = 52%, Black = 59%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Bachmann, Axel"]
[Black "Ramirez, Alejandro"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2653"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "44"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,44,15,25,22,32,20,23,4,27,26,14,24,35,25,27,37,19,0,0,0,20,16,16,16,26,0,0,0,0,0,0,-2,-2]} 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 e6 5. Bd3 Nbd7 6. b3 {D30: Queen's Gambit Declined: Systems without Nc3} b6 7. O-O Bb7 {LiveBook: 50 Games} 8. Qe2 {White has an edge.} Be7 9. Bb2 O-O 10. Rd1 Qc7 11. Nc3 Rfe8 12. Rac1 Rad8 13. h3 Qb8 14. a3 a5 15. Ne5 Nxe5 16. dxe5 {[#]} Nd7 $146 ({Predecessor:} 16... dxc4 17. Bxc4 Nd7 18. f4 b5 {½-½ (91) Bacrot,E (2717)-Van Wely,L (2647) Wijk aan Zee 2006}) 17. cxd5 cxd5 18. Bb5 Rf8 $1 19. Bxd7 Rxd7 {The position is equal.} 20. Na4 Bc8 21. Rc2 Rb7 22. Rdc1 Bd7 {Precision: White = 67%, Black = 69%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Bruzon Batista, Lazaro"]
[Black "Quintiliano Pinto, Renato R"]
[Result "1-0"]
[ECO "A06"]
[WhiteElo "2650"]
[BlackElo "2483"]
[Annotator "TA"]
[PlyCount "138"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,138,0,6,10,15,18,19,1,27,16,21,15,8,-6,41,36,77,62,74,2,0,17,9,20,32,19,91,16,70,66,63,74,80,95,92,69,73,68,69,49,50,34,173,158,416,347,340,347,329,221,213,200,355,353,345,162,162,172,156,157,162,159,156,130,181,159,148,71,141,126,252,131,162,83,82,66,129,121,123,38,70,6,183,172,166,152,277,256,325,326,310,299,712,722,1147,1057,978,729,837,625,399,0,743,0,0,0,724,652,463,298,289,0,0,0,29979,29980,29985,29979,29979,29980,29985]} 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. c4 Be7 5. d4 O-O 6. Nc3 Nbd7 7. O-O dxc4 8. e4 c6 9. Bf4 Re8 10. a4 a5 11. Qe2 {E07: Closed Catalan: Main Line (5 Nf3 0-0 6 0-0 Nbd7)} b6 12. Rfd1 Ba6 13. Nd2 {The position is equal.} Bf8 14. Nxc4 Nd5 15. Bd2 (15. exd5 exd5 16. Qc2 Bxc4 $17) 15... Rc8 16. Rac1 Nb4 {[#]} 17. e5 $146 ({Predecessor:} 17. Be3) 17... c5 18. Nb5 $1 Nd5 19. Qg4 (19. Be3 $16) 19... f5 (19... Bxb5 $5 20. axb5 f5 21. exf6 N7xf6 $11) 20. exf6 N7xf6 21. Qe2 cxd4 22. Nxd4 Kh8 (22... Qd7 $11) 23. Bh3 (23. Nb5 $16) 23... Rxc4 (23... Nc3 $11 24. Bxc3 Bxc4) 24. Rxc4 $14 {aiming for Nb5.} Bxc4 25. Qxc4 e5 26. Ne6 {[%cal Bd4e6,Be6g5,Bg5f3,Bf3h4,Bh4g6,Bg6f4][%mdl 32]} Qd6 27. Ng5 Qc5 28. Qb3 {Black must now prevent Bc3.} h6 29. Rc1 Qe7 $1 30. Nf3 $36 {[%mdl 2048] Black is under pressure.} e4 (30... Qf7 $14) 31. Nh4 $1 $18 {[%cal Rh4g6]} Qd8 $2 (31... Qb7 $16 {keeps fighting.} 32. Ng6+ Kh7) 32. Ng6+ Kh7 33. Bf5 Bc5 34. Be3 Bxe3 35. fxe3 h5 $2 (35... Qd6 {is a better defense.} 36. Rc6 Qb4 37. Qxb4 Nxb4 38. Rxb6 Nbd5 39. Nf4+ Kh8 40. Nxd5 Nxd5) 36. Nf4+ Kh6 37. Rd1 (37. Rc8 $142 Qd6 38. Rxe8 Nxf4 39. Rh8+ (39. exf4 Nxe8 40. Kg2 Nf6 $14) 39... Kg5 40. Bxe4 Ne2+ 41. Kf2 Nxe4+ 42. Kxe2) 37... Re5 38. Be6 $1 {[%cal Re6d5]} g5 39. Bxd5 gxf4 40. Bc4 Qc7 41. gxf4 Re7 (41... Rc5 $16 42. Be2 Rc2) 42. Be2 Rg7+ 43. Kh1 (43. Kf1 $142) 43... Rg6 (43... Qc6 $142) 44. Qc3 Qg7 (44... Qxc3 $16 {might work better.} 45. bxc3 h4) 45. Qe1 (45. Qe5 $18) 45... Qe7 46. Qf2 (46. Bc4 $18) 46... Qc5 $16 47. Rg1 Rxg1+ (47... Rg7 $1 $14) 48. Qxg1 Kh7 {[#]} 49. h3 (49. b3 $1 $16) 49... Qc2 $1 $14 {[%cal Rc2e2]} 50. Bb5 ({White should try} 50. f5 $1 $14 Qxe2 51. Qg6+ Kh8 52. Qxf6+ Kg8 53. Qe6+ (53. Qxb6 Qf1+ 54. Kh2 Qf2+ 55. Kh1 Qf1+ 56. Kh2 Qf2+ 57. Kh1 Qf1+ $11) 53... Kf8 54. Qd6+ (54. Qxe4 Qf1+ 55. Kh2 Qf2+ 56. Qg2 Qxe3 $11) 54... Kf7 55. Qc7+ (55. Qxb6 Qf1+ 56. Kh2 Qf2+ 57. Kh1 Qf1+ 58. Kh2 Qf2+ 59. Kh1 Qf1+ $11) 55... Kf8 56. Qd8+ (56. Qxb6 Qf1+ 57. Kh2 Qf2+ 58. Kh1 Qf1+ 59. Kh2 Qf2+ 60. Kh1 Qf1+ $11) 56... Kf7 57. Qc7+ (57. Qxb6 Qf1+ 58. Kh2 Qf2+ 59. Kh1 Qf1+ 60. Kh2 Qf2+ 61. Kh1 Qf1+ $11) 57... Kf8 58. Qd8+ (58. Qxb6 Qf1+ 59. Kh2 Qf2+ 60. Kh1 Qf1+ 61. Kh2 Qf2+ 62. Kh1 Qf1+ $11) 58... Kf7 59. Qc7+ (59. Qxb6 Qf1+ 60. Kh2 Qf2+ 61. Kh1 Qf1+ 62. Kh2 Qf2+ 63. Kh1 Qf1+ $11)) 50... Qd2 $2 (50... Kh8 $1 $11) 51. f5 $18 {Threatening mate with Qg6+.} Kh8 {[#]} 52. Qg5 $1 {[%cal Rg5f6]} Qc1+ (52... Nh7 $16 53. Qf4 (53. Qxh5 Qxe3 54. Be2 Qc1+ 55. Kg2 Qxb2 $16) 53... Qxb2 54. Qxe4 Qc1+ 55. Kg2 Qd2+ 56. Kf1 Qc1+ 57. Kf2 Qd2+ 58. Be2 Qd6 59. Qe8+ (59. Bxh5 Nf6 $16) 59... Kg7 60. Qxh5 Qh2+ 61. Ke1 Qg3+ 62. Kd2 Nf6) 53. Kg2 Qxb2+ 54. Kg3 Qe5+ 55. Kh4 Qe7 $2 (55... Qb2 56. Be2 Nh7 57. Qd8+ Kg7 58. Qc7+ Kh8 59. Qb8+ (59. Bxh5 Qf6+ 60. Kg3 Qg5+ 61. Bg4 Qxe3+ 62. Kh4 Qh6+ 63. Kg3 Qe3+ 64. Kh4 Qh6+ 65. Kg3 Qe3+ $11) 59... Kg7 60. Qg3+ (60. Bxh5 Qf6+ 61. Kg3 Qg5+ 62. Bg4 Qxe3+ 63. Kg2 Qd2+ 64. Kh1 Qe1+ 65. Kg2 Qd2+ 66. Kh1 Qe1+ 67. Kh2 Qf2+ 68. Kh1 Nf6 $11) 60... Kf8 61. Qd6+ Kg7 62. Qg3+ Kh8 63. Kxh5 Qf6) 56. Bc4 Qe5 57. Be6 Qa1 58. Qg3 Qc3 59. Kg5 {And now Qb8+ would win.} Kg7 {Now ...Qc5 and Black clings on.} 60. Kh4+ $2 (60. Ba2) 60... Kh8 61. Qf4 Qe1+ $1 62. Qg3 ({Weaker is} 62. Kg5 Qg1+ 63. Kh4 Kh7 $18) 62... Qc3 $1 63. Bf7 Qa1 64. Bg6 {Strongly threatening Qc7.} Qc3 65. Qb8+ $2 ({Better is} 65. Bxh5 $18 {Threatens to win with Qd6.} Qc5 66. Qf4) 65... Kg7 $11 66. Qg3 Kf8 $2 {[%mdl 8192]} (66... Kh8 $11) 67. Qd6+ {White mates.} Kg8 68. Qd8+ Kg7 69. Qe7+ Kh8 {Precision: White = 45%, Black = 38%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Cori, Jorge"]
[Black "Martinez Romero, Martin"]
[Result "1-0"]
[ECO "A48"]
[WhiteElo "2618"]
[BlackElo "2427"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,69,-11,0,-13,14,23,16,17,16,17,17,19,16,16,14,0,1,4,31,12,32,27,32,27,100,86,115,130,173,166,158,172,173,177,173,164,147,141,140,96,179,166,178,129,160,156,247,218,368,375,462,445,436,445,440,331]} 1. d4 Nf6 2. Nf3 g6 3. c3 Bg7 4. Bf4 O-O 5. e3 d6 6. h3 b6 7. Nbd2 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} (7. a4 a5 8. Nbd2 Bb7 9. Bb5 Nbd7 10. O-O Re8 11. Bh2 Qc8 12. Re1 c6 13. Bd3 Ba6 14. Nc4 Qb7 {½-½ (106) Kamsky,G (2676)-Nepomniachtchi,I (2751) Sochi 2017}) 7... Bb7 8. Bh2 Nbd7 {LiveBook: 5 Games} 9. a4 {The position is equal.} Ne4 $146 (9... e5 $5) ({Predecessor:} 9... a6 10. Be2 c5 11. O-O {½-½ (11) Diulger,A (2364)-Baryshpolets,A (2305) Kiev 2007}) 10. Nxe4 Bxe4 11. Ba6 {[%cal Bf1a6,Ba6d3,Bd3c2][%mdl 32]} c5 12. O-O Qc7 13. Qe2 Bb7 14. Bd3 Rac8 15. Rfd1 c4 16. Bc2 a6 17. e4 b5 18. Bf4 e5 19. Be3 h6 (19... exd4 $11 {keeps the balance.} 20. Bxd4 (20. Nxd4 bxa4 21. Nf3 a3 $14) 20... Ne5) 20. Qd2 Nf6 21. Bxh6 Nxe4 22. Qe3 exd4 23. Nxd4 Rce8 24. Bxg7 (24. axb5 Nxf2 25. Qxf2 Bxh6 $15) 24... Kxg7 25. axb5 axb5 26. Ra7 Qb8 27. Ra5 b4 (27... d5 $16 28. Rda1 (28. Nxb5 Nd6 $16) 28... Nd6) 28. cxb4 $18 d5 29. Nf3 Nf6 30. Qc3 $36 {[%mdl 2048] White is in control.} Qf4 {[#]} (30... Qd6 $16 31. b3 cxb3) 31. Rb5 $1 {[%cal Rb5b7]} Ba8 (31... Rb8 {might work better.} 32. Rb6 Ba8) 32. Rb6 Re6 33. Rxe6 {White is clearly winning.} fxe6 34. Re1 Re8 35. b5 {Precision: White = 76%, Black = 42%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Sevian, Samuel"]
[Black "Vazquez, Guillermo"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2601"]
[BlackElo "2443"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,55,15,22,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,91,97,87,89,94,106,95,83,224,219]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 Be7 9. Qd2 O-O 10. O-O-O Nbd7 11. g4 {[%cal Bg2g4,Bg4g5][%mdl 32]} b5 12. Rg1 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} Nb6 13. Na5 Rc8 14. g5 $1 {[%cal Rg5f6] The position is equal.} Nh5 15. Kb1 g6 16. h4 Qc7 17. Nd5 Nxd5 18. exd5 {[#]} Bd7 $146 ({Predecessor:} 18... Bxd5 19. Qxd5 Qxa5 {0-1 (40) Salem,A (2615)-Sjugirov,S (2667) Moscow 2016}) 19. c4 Bd8 20. Nc6 $1 Bxc6 21. dxc6 Qxc6 22. cxb5 axb5 23. Rc1 Qb7 (23... Qxc1+ $11 {keeps the balance.} 24. Qxc1 Rxc1+ 25. Bxc1 b4) 24. Rxc8 $16 ({Inferior is} 24. Qxd6 Rxc1+ 25. Bxc1 (25. Kxc1 Bc7 $17) 25... Bb6 $17) 24... Qxc8 25. Qxd6 Bc7 26. Qc6 b4 27. Ba6 Qa8 (27... Qf5+ $16 {was necessary.} 28. Ka1 Qe6) 28. Rc1 {Precision: White = 90%, Black = 68%.} ({Not} 28. Qxc7 Qxa6 29. Qxe5 Rd8 $14) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Fier, Alexandr"]
[Black "Kaidanov, Gregory S"]
[Result "1-0"]
[ECO "D44"]
[WhiteElo "2576"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,83,112,110,172,85,170,143,163,163,163,158,159,158,191,115,97,108,100,98,143,122,243,231,330,340,314,329,353,353,324,351,343,333,318,0,325,325,311,337,332,326,330,323,481,472,497,494,552,549,485,493,549,549,707,708,660,642]} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 4. Nc3 c6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. exf6 Qa5 12. g3 Ba6 13. Qf3 b4 14. Ne4 O-O-O 15. Be2 {LiveBook: 15 Games. D44: Semi-Slav: Botvinnik System} c5 $146 {[#]} (15... Bb7 $16) ({Predecessor:} 15... Bb7 16. Bxc4 Nb6 17. Bb3 c5 18. O-O c4 19. h4 Qf5 20. Qxf5 exf5 21. Nc5 cxb3 22. axb3 Rxd4 {0-1 (50) Kuzubov,Y (2653)-Baghdasaryan,V (2401) Poti 2015}) 16. Nxc5 (16. Rc1 $1 $18) 16... Bxc5 (16... Nxc5 $16 {was necessary.} 17. Qc6+ (17. dxc5 Bb7 $14) 17... Qc7 18. Qxc7+ Kxc7 19. dxc5 Bxc5) 17. dxc5 $18 {[%cal Bd4c5,Bc5c6][%mdl 32] White is clearly better.} Bb7 18. c6 Qxg5 19. cxb7+ $40 {[%mdl 128] White has strong attack.} Kb8 {[#]} 20. h4 $1 {[%cal Rh4g5]} Qe5 21. O-O-O (21. Rc1 $18) 21... c3 $16 22. bxc3 bxc3 23. Kc2 Qa5 {Threatens to win with ...Nb6.} 24. Bc4 Ne5 (24... Nb6 $16 25. Qxc3 Qf5+ 26. Kb3 Kxb7) 25. Qxc3 $18 Qa4+ (25... Nxc4 {was worth a try.} 26. Qxc4 Qf5+ 27. Kb3 Qf3+ 28. Qc3 Qxf2 29. Qe5+ Kxb7 30. Qb5+ Qb6 31. Qxb6+ Kxb6 32. Rxd8 Rxd8) 26. Bb3 {White threatens Rxd8+ and mate.} Qe4+ 27. Kb2 Rd3 28. Rhe1 Rxc3 29. Rxe4 Rc5 30. Ra4 Rc7 31. Re4 $2 ({Better is} 31. Rb4 $18) 31... Nd7 $2 {[%mdl 8192]} (31... Rc5 $1 $11 {and Black stays safe.} 32. Ka3 a6) 32. Red4 Nxf6 33. Rd8+ ({Don't take} 33. Rf4 Nh5 $18) 33... Rxd8 34. Rxd8+ Kxb7 {[%mdl 4096] Endgame KRB-KRN} 35. Bd1 Nd7 (35... Re7 $142 36. h5 Kc7) 36. h5 {[%cal Bh4h5,Bh5h6][%mdl 32] White is clearly winning.} f5 37. h6 Ne5 {and the idea ...Rh7 leaves Black hopeful.} 38. f4 Nc4+ 39. Kb3 Kb6 40. Rb8+ Ka5 41. Be2 Nd2+ 42. Ka3 {Precision: White = 78%, Black = 45%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Ortiz Suarez, Isan Reynaldo"]
[Black "Zapata, Alonso"]
[Result "1/2-1/2"]
[ECO "B40"]
[WhiteElo "2570"]
[BlackElo "2420"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,115,23,0,8,0,0,0,7,0,19,0,4,15,20,0,0,0,0,-21,-16,-12,-18,-18,-19,-43,-43,-80,-77,-125,-124,-125,-122,-270,-328,-344,-326,-392,-398,-403,-392,-382,-354,-308,-242,-346,-345,-339,-305,-304,-288,-409,-402,-368,-306,-1813,-808,-1767,-608,-1818,-607,-1823,-1818,-1720,-1668,-1600,0,-1554,-1554,-1497,-1387,-1287,-1044,-5871,-5584,-4753,-4101,-29970,-29971,-29971,-29972,-29972,-29973,-29973,-29974,-29974,-29975,-29976,-29977,-29977,-29978,-29978,-29979,-29982,-29974,-29963,-29976,-29974,-8,-8,-8,-8,-8,-8]} 1. e4 c5 2. Nf3 e6 3. Be2 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 Bb4 7. O-O O-O 8. Qd3 e5 {B45: Sicilian Four Knights} (8... d5 9. exd5 exd5 10. Bf4 Re8 11. Bf3 Qb6 12. Rad1 Ne5 13. Bxe5 Rxe5 14. a3 Bd6 15. Qb5 Bc5 16. Qxb6 Bxb6 {½-½ (35) Voiculescu,C (2583)-Chiru,I (2534) ICCF email 2010}) 9. Nb3 Bxc3 10. bxc3 d5 11. exd5 Nxd5 $146 ({Predecessor:} 11... Qxd5 12. Bg5 Qxd3 13. cxd3 Nd5 14. Rac1 h6 15. Bd2 Bf5 16. Rfe1 {1-0 (63) Agulnick,M (2090)-Holanda,D (2031) IECC email 2010}) 12. Rd1 Nf4 13. Bxf4 exf4 14. Qxd8 Rxd8 15. Bf3 {aiming for Bxc6.} (15. Na5 $5 {[%cal Ra5c6]} Rxd1+ 16. Rxd1 $11) 15... Bf5 16. Nd4 (16. Nc5 {is interesting.} Bxc2 17. Rxd8+ Nxd8 18. Re1 Ne6 19. Nxe6 Re8 20. Bxb7 fxe6 21. g3) 16... Nxd4 17. Rxd4 Rxd4 18. cxd4 $11 {[%mdl 4096] Endgame KRB-KRB} Rc8 19. Bxb7 Rxc2 20. d5 Kf8 21. a4 Ke7 22. Re1+ Kd6 23. f3 (23. Ba6 $17 {was called for.}) 23... Rb2 $19 24. Ba6 Rb1 ({Stronger than} 24... Kxd5 25. Re7 $11) 25. Rxb1 Bxb1 {KB-KB} 26. Bc4 a5 27. Bb3 Kc5 28. Kf2 Bf5 29. Ke2 (29. g3 {is the only way for White.}) 29... Kb4 30. Bd1 Kc3 31. d6 Bd7 32. Ke1 (32. Kf2 $142) 32... g5 33. Kf2 h5 {[%cal Bh7h5,Bh5h4][%mdl 32]} 34. h3 $2 (34. g3) 34... f6 (34... h4 $142 35. Kf1 f6) 35. Ke1 Bc6 (35... h4 $142 36. Ke2 Be8) 36. Ke2 f5 (36... h4 $142 37. Kf2 Kc4) 37. Ke1 h4 38. Ke2 Bd7 39. Ke1 Bc6 40. Ke2 $1 Kd4 41. Kd2 Ke5 42. Kc3 Kxd6 43. Kc4 {[#]} g4 $1 {[%mdl 512]} 44. Kd4 (44. fxg4 Bxg2) 44... Bd5 45. fxg4 fxg4 46. Bxg4 Bxg2 47. Bf5 Bc6 48. Bc2 f3 49. Ke3 Kc5 50. Bd1 Kb4 51. Kf2 Bxa4 52. Bxf3 Bd7 53. Bg4 Bb5 54. Ke3 a4 55. Kd2 Kb3 $2 (55... a3 {mates} 56. Kc1 Bd3 57. Kd2 a2 58. Kxd3 a1=Q 59. Ke4 Kc5 60. Be6 Qf6 61. Bf5 Qd4+ 62. Kf3 Kd5 63. Bh7 Qf6+ 64. Ke3 Qe7+ 65. Kd3 Qxh7+ 66. Ke3 Qe4+ 67. Kf2 Qf4+ 68. Ke2 Kd4 69. Kd1 Kd3 70. Ke1 Qf6 71. Kd1 Qf1#) 56. Bd1+ $1 $11 {The position is equal.} Kc4 {[#]} 57. Bxa4 $1 {[%mdl 512]} Bxa4 58. Ke3 {Precision: White = 24%, Black = 68%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Flores, Diego"]
[Black "Cuartas, Jaime Alexander"]
[Result "0-1"]
[ECO "B38"]
[WhiteElo "2567"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "134"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,134,0,-9,-107,-108,-110,-114,-129,-131,-123,-114,-153,-145,-153,-57,-80,-54,-61,-57,-57,-58,-63,-56,-77,-72,-77,-70,-74,-78,-78,-59,-84,-91,-179,-77,-84,-84,-77,-77,-84,-76,-79,-74,-79,-79,-85,-89,-87,-75,-86,-87,-86,-81,-82,0,-85,-53,-61,-53,-53,-53,-89,-68,-325,-325,-317,-9,-9,-9,-9,-9,-16,-8,-29951,-29954,-29953,-29954,-29957,-29959,-29957,-29960,-29963,-29959,-29967,-29968,-29968,-29967,-29965,-29968,-29969,-29970,-29969,-29971,-29972,-29973,-29973,-29974,-29976,-29977,-29977,-29977,-29977,-29978,-29977,-29978,-29981,-29982,-29987,-29984,-29988,-29989]} 1. c4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. e4 Nc6 6. Be3 Nf6 7. Nc3 O-O 8. Be2 b6 9. O-O Bb7 10. Qd2 Nxd4 11. Bxd4 e5 12. Bxe5 Nxe4 13. Nxe4 Bxe5 14. f4 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0} (14. Nd6 $11 Bxd6 15. Qxd6) (14. Nd6 Bc6 15. Rad1 Qf6 16. b3 Bf4 17. Qd4 Qh4 18. h3 f5 19. c5 Rf6 20. Bb5 Bf3 21. Rd3 Kg7 {1-0 (58) Korneev,O (2581)-Argandona Riveiro,I (2434) Linares 2014}) 14... Bxb2 $1 $17 15. Qxb2 Bxe4 16. Bf3 {Black is better.} Bxf3 17. Rxf3 Rc8 $146 ({Predecessor:} 17... Qc7 18. f5 Qc5+ 19. Kh1 Qxc4 20. Qd2 f6 21. fxg6 hxg6 {0-1 (81) Parameswaran,T (2365)-Crouch,C (2410) Kolkata 1994}) 18. f5 Rxc4 19. Raf1 gxf5 ({Black should try} 19... Qh4 $17 20. Rd1 Qe7) 20. Rxf5 Rg4 21. Qe5 d6 22. Qe3 Rg7 23. h3 Re8 24. Qf4 {[%cal Rf5f7]} Qe7 25. Rf2 Qc7 26. Rf6 Re5 27. Kh2 b5 28. Rd2 Rg6 29. Rdxd6 (29. Rfxd6 $17 Rxd6 30. Qxe5) 29... Re6 (29... Rc5 $19 {is more deadly.} 30. Rxg6+ hxg6) 30. Rdxe6 Qxf4+ 31. Rxf4 Rxe6 {[%mdl 4096] Endgame KR-KR} 32. a4 a6 33. axb5 axb5 34. Rb4 Re5 35. Rd4 Kf8 36. Kg3 Ke7 37. Kf4 Rc5 38. Ke3 Rc3+ 39. Ke4 Rc5 (39... Rc2 $17 40. Rb4 Rc5) 40. Kd3 (40. Ke3 $1 $11) 40... Ke6 {[#] ...Rd5 is the strong threat.} 41. Re4+ Re5 {aiming for ...Rxe4.} 42. Rh4 h5 43. Kc3 Kf6 44. g4 $2 {[%mdl 8192]} ({Better is} 44. Kd3 $15) 44... hxg4 $19 45. hxg4 Rg5 $2 (45... Kg7 $19 {Black wants to play ...f6.} 46. Kd4 f6) 46. Rh6+ $1 $11 Kg7 47. Rb6 Rd5 48. Kb4 Rd4+ 49. Kxb5 $2 {[%mdl 8192] [#]} (49. Kc3 $11 Rd5 50. Kb4) 49... Rxg4 {Black mates.} 50. Kc5 f6 {[%cal Bf7f6,Bf6f5,Bf5f4,Bf4f3][%mdl 32]} 51. Kd5 Kg6 52. Rb8 f5 53. Rb1 Kf6 54. Rf1 Ra4 55. Re1 f4 56. Re4 Ra5+ 57. Kd4 Kf5 58. Re8 Ra3 59. Rg8 f3 60. Rf8+ Kg4 61. Ke4 Kg3 62. Rg8+ Kh2 63. Rh8+ Kg2 64. Rg8+ Kf1 65. Kf4 f2 66. Re8 Kg2 67. Rg8+ Kh2 {Precision: White = 40%, Black = 58%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Shabalov, Alexander"]
[Black "Sanchez, Sebastian Felipe"]
[Result "1-0"]
[ECO "C10"]
[WhiteElo "2556"]
[BlackElo "2388"]
[Annotator "TA"]
[PlyCount "44"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,44,14,8,-22,22,-31,54,47,54,46,44,54,39,-141,-144,-142,-143,-139,16,3,189,193,168,158,29984,29985,29997]} 1. e4 e6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Nd7 5. Nf3 {[%cal Bg1f3,Bf3e5,Be5c4][%mdl 32]} Ngf6 6. Nxf6+ Nxf6 7. Be3 Bd6 {C10: French with 3 Nc3: Unusual Black 3rd moves and 3...dxe4} 8. Bd3 b6 (8... O-O 9. Qe2 b6 10. O-O-O Bb7 11. Kb1 Nd5 12. Bd2 Nf4 13. Bxf4 Bxf4 14. Be4 Bxe4 15. Qxe4 Qf6 16. Rd3 Rad8 17. Rhd1 a5 18. g3 {½-½ (18) Shankland,S (2676)-Cordova,E (2645) Matanzas 2017}) 9. Ne5 O-O 10. Qf3 Nd5 $1 {LiveBook: 4 Games} 11. Bd2 {aiming for c4.} Bb7 12. O-O-O (12. c4 $11 Bxe5 13. Qh3 (13. cxd5 Bf6 $17)) 12... Qh4 (12... c5 $1 $15) 13. Rhe1 $14 f5 $146 ({Predecessor:} 13... c5 14. dxc5 bxc5 15. Nc4 {½-½ (23) Pavasovic,D (2575)-Tratar,M (2483) Zadar 2006}) 14. Nc4 $1 Qxd4 15. Rxe6 Bc5 16. Rf1 $2 {[#]} (16. Re5 $14 {keeps the upper hand.}) 16... Nb4 $1 $17 17. Qe2 Nxd3+ ({Worse is} 17... Nxa2+ 18. Kb1 $16) 18. cxd3 {[#]} Bxg2 $2 (18... Qd7 $1 $17 19. Bc3 Rad8) 19. Rg1 $11 Bd5 $2 (19... f4 $1 $11 {and Black is okay.} 20. Bc3 (20. Rxg2 f3 $17) 20... f3 21. Bxd4 fxe2 22. Bxc5 bxc5) 20. Be3 $18 Qh4 21. Bxc5 {Black must now prevent Qe5.} Bxc4 $2 ({Don't go for} 21... Qxh2 $2 22. Rg3 $18) (21... Qf4+ $16 22. Kb1 bxc5) 22. Qe5 {[%csl Gg1][%cal Re5g7]} Rf7 {Precision: White = 43%, Black = 30%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Vasquez Schroeder, Rodrigo"]
[Black "Iturrizaga Bonelli, Eduardo"]
[Result "1/2-1/2"]
[ECO "B42"]
[WhiteElo "2553"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "29"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,29,54,25,31,1,16,5,42,41,36,43,38,43,47,23,60,18,9,5]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Ne7 6. O-O Nbc6 7. Nb3 g6 {B42: Sicilian: Kan Variation: 5 Bd3} (7... Ng6 8. a4 b6 9. f4 Be7 10. Be3 d6 11. c3 O-O 12. N1d2 Bb7 13. Qf3 e5 14. f5 Nf4 15. Bc2 {1-0 (26) Hansen,E (2603)-Smirin,I (2667) Wijk aan Zee 2017}) 8. f4 d5 9. e5 Bg7 10. N1d2 $146 ({Predecessor:} 10. a4 O-O 11. a5 f6 12. exf6 Bxf6 13. Nc3 Bg7 14. Qe2 e5 15. fxe5 Rxf1+ 16. Qxf1 Bxe5 {½-½ (55) Biolek,R (2406)-Ivanov,M (2497) Marianske Lazne 2009}) 10... f6 11. exf6 Bxf6 12. Nf3 O-O 13. Qe2 Qc7 14. Re1 Bd7 15. c3 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Erenburg, Sergey"]
[Black "Cordova, Emilio"]
[Result "1-0"]
[ECO "B01"]
[WhiteElo "2550"]
[BlackElo "2651"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,57,101,94,115,97,100,104,112,123,120,57,126,93,264,262,272,253,329,325,325,324,452,451,407,368,389,386,399,408,395,358,418,410,447,448,512,509,480,474,646,639]} 1. e4 d5 2. exd5 Qxd5 3. Nf3 Nf6 4. d4 c6 5. Be2 Bg4 6. h3 {B01: Scandinavian Defence} Bh5 (6... Bxf3 7. Bxf3 Qa5+ 8. c3 e6 9. Bf4 Qa6 10. Qb3 Nbd7 11. Nd2 Nd5 12. Bg3 Be7 13. Nc4 {1-0 (48) Giri,A (2752)-Kramnik,V (2783) Flor & Fjaere 2014}) 7. O-O e6 8. c4 Qd8 9. Nc3 Nbd7 10. Bf4 {LiveBook: 3 Games} Nb6 11. g4 $146 ({Predecessor:} 11. b3 Bb4 12. Rc1 O-O 13. Ne5 Bxc3 14. Rxc3 Bxe2 15. Qxe2 Qxd4 {½-½ (47) Schneider,J (1883)-Hipler,A (1696) Gau Algesheim 2010}) 11... Bg6 12. Ne5 Nfd7 13. Nxg6 hxg6 14. c5 Nc8 (14... e5 $1 $14) 15. Kg2 Be7 $2 {[#]} (15... Nf6 $16 {was called for.}) 16. Qb3 $18 b6 17. Bf3 bxc5 18. Bxc6 Ncb6 {[#]} 19. dxc5 $1 Bxc5 20. Rad1 Rc8 21. Qb5 {Hoping for Qxc5.} Rxc6 22. Qxc6 Qc8 23. Qxc8+ Nxc8 24. Ne4 Be7 25. Rc1 Ncb6 26. Rc7 {White is clearly winning.} e5 27. Be3 f5 28. Nc3 e4 29. Rd1 {Precision: White = 84%, Black = 14%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Mekhitarian, Krikor Sevag"]
[Black "Fernandez Reyes, Lisandro"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2542"]
[BlackElo "2402"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,93,11,45,19,47,50,52,45,57,57,57,49,59,50,64,51,58,63,76,55,62,63,69,58,92,77,81,64,91,88,90,78,123,118,124,135,234,234,234,234,234,227,265,266,266,266,267,263,272,208,208,208,208,202,201,201,201,183,188,188,179,185,211,211,211,211,209,208,506,494,586,536,572,548,999,1014]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Ng4 7. Bg5 h6 8. Bc1 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} Nc6 (8... Nf6 9. Bd3 e5 10. Nde2 Be7 11. O-O O-O 12. Ng3 Nbd7 13. a4 Nc5 14. Be2 Be6 15. Bf3 Rc8 {½-½ (66) Grischuk,A (2750)-Vachier Lagrave,M (2795) Moscow 2017}) 9. Be2 Qb6 10. Bxg4 Qxd4 {LiveBook: 3 Games} (10... Bxg4 {seems wilder.} 11. Qxg4 Qxd4 12. O-O e6 13. h3 g5) 11. O-O (11. Qxd4 {feels hotter.} Nxd4 12. Bd1 Be6 13. Be3 Nc6 14. Be2) 11... Qxd1 12. Bxd1 e6 $146 ({Predecessor:} 12... b5 13. Nd5 Rb8 14. Be3 e6 15. Nb6 Ne5 16. Nxc8 Rxc8 {1-0 (32) Nowak,Z (2417)-Hauschild,A Chessfriend.com 2004}) 13. Na4 $1 Be7 14. Nb6 Rb8 15. c3 Ne5 16. Be2 Bd8 17. Be3 Bc7 18. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Nd7 19. Nxc8 Rxc8 20. Rfd1 Ke7 21. a5 Ne5 22. f4 Nc6 23. b4 {[%cal Bb2b4,Bb4b5,Bb5b6][%mdl 32]} Rhd8 24. Kf1 Kf8 25. g3 Ne7 26. c4 Rd7 27. b5 Ra8 (27... Ke8 $16 28. Kf2 Bd8) 28. b6 $18 Bd8 {[#]} 29. Bc5 $1 {[%mdl 512]} Nc6 (29... dxc5 30. Rxd7) 30. e5 {[%cal Be4e5,Be5d6][%mdl 32]} ({Don't do} 30. Rxd6 $6 Ke8) 30... Be7 31. exd6 Bf6 32. Ra4 Rc8 33. Bf3 Bc3 34. Bxc6 Rxc6 35. Ba3 Ke8 36. Rd3 Bf6 37. c5 Rd8 38. g4 Kd7 39. Ke2 Rcc8 40. Re4 Rh8 41. Rf3 g6 42. Kd3 h5 43. f5 exf5 $2 {[#]} (43... gxf5 44. gxf5 e5) 44. gxf5 {White is clearly winning.} g5 45. Rfe3 Kc6 46. Kc4 Rcd8 47. Bb4 {Precision: White = 82%, Black = 42%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Vera Siguenas, Deivy"]
[Black "Delgado Ramirez, Neuris"]
[Result "0-1"]
[ECO "B90"]
[WhiteElo "2526"]
[BlackElo "2613"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,98,54,47,72,24,33,37,29,35,26,39,16,18,14,-11,54,50,56,49,38,43,58,62,56,64,61,61,43,48,66,30,57,50,64,14,8,-16,-21,-49,-50,-43,-43,-87,-93,-133,-114,-107,-100,-170,-180,-177,-181,-181,-179,-228,-212,-336,-326,-346,-235,-262,-272,-276,-227,-291,-286,-345,-347,-425,-335,-574,-574,-565,-562]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be7 8. f3 O-O 9. Qd2 Be6 10. O-O-O b5 11. g4 b4 12. Nd5 Bxd5 13. exd5 a5 14. Kb1 {LiveBook: 111 Games} Nbd7 {[%cal Bb8d7,Bd7b6,Bb6c4,Bc4e3][%mdl 32] B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} (14... a4 15. Nc1 Qa5 16. g5 Nh5 17. Bh3 Na6 18. Bd7 Bd8 19. Nd3 Bb6 20. Bxb6 Qxb6 21. Bxa4 Nc5 22. Nxc5 Qxc5 23. Bb3 f5 24. Rc1 Rae8 25. c3 bxc3 26. Qxc3 Qf2 27. Rhf1 Qg2 28. Rg1 {½-½ (28) Khairullin,I (2537)-Gashimov,V (2608) Istanbul 2005}) 15. Bb5 Nb6 16. Bc6 Nc4 {White is slightly better.} 17. Qe2 Nxe3 18. Qxe3 Ra6 $1 19. f4 $146 a4 20. Nc1 Nd7 (20... a3 $11) 21. Nd3 $1 $14 exf4 22. Qxf4 b3 $1 23. cxb3 axb3 24. a3 Nc5 25. Qc4 Rb6 26. Rhf1 Qc7 27. Rf3 Nd7 28. Re1 (28. g5 $5) 28... Bh4 29. Re2 Bg5 30. h4 Bxh4 31. Qf4 {Hoping for g5.} h6 $1 32. Re8 {Black must now prevent Qxf7+.} Bf6 33. Rxf8+ Kxf8 34. Qa4 Rb8 35. Re3 Bg5 36. Re2 {[#]} Nf6 $1 37. Nb4 (37. Qd4 $17) 37... Qc8 $19 38. Qxb3 Qxg4 39. Qc2 g6 40. Na6 Rc8 {Threatens to win with ...Nxd5!} 41. Qd3 (41. Rg2 $142 Qf4 42. Nb4) 41... h5 {[%cal Bh6h5,Bh5h4][%mdl 32]} 42. Ka2 Nd7 43. Bxd7 Qxd7 44. Nb4 Re8 45. Rf2 {And now Qxg6 would win.} Kg8 46. Nc6 h4 47. Rf3 Qg4 48. Qf1 $2 {[#]} (48. Na5 {is a better defense.}) 48... Re1 $1 {[%mdl 512]} 49. Qd3 (49. Qxe1 Qxf3) 49... Qg1 {Precision: White = 46%, Black = 67%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Garcia Pantoja, Roberto"]
[Black "Quinonez Garcia, Santiago"]
[Result "1/2-1/2"]
[ECO "B38"]
[WhiteElo "2500"]
[BlackElo "2379"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,89,51,50,49,25,28,29,22,26,35,32,39,37,55,48,63,28,40,35,58,23,83,82,78,67,58,49,184,193,209,209,205,202,199,181,256,273,314,313,286,278,352,-66,-65,-65,-65,-65,0,0,0,0,0,0,0,-190,-183,-177,-184,-171,-11,-11,-11,-11,-15,-24,-8,-8,-3,-8,0,0]} 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 d6 8. Be2 O-O 9. O-O Bd7 10. f3 Nxd4 11. Bxd4 a5 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0} 12. a3 (12. b3 Bc6 13. Qd2 Nd7 14. Be3 Nc5 15. Rab1 Qb6 16. Rfc1 Rfc8 17. Rc2 Qb4 18. Qc1 Qb6 19. Kh1 h5 20. a3 Qd8 21. Qd2 Kh7 22. Bf1 Qf8 23. b4 axb4 24. axb4 Na4 25. Ne2 {1-0 (55) Navara,D (2734)-Mamedov,R (2650) Huaian 2016}) 12... a4 13. c5 dxc5 {White has an edge.} 14. Bxc5 Bc6 15. Qe1 $146 ({Predecessor:} 15. Qxd8 Rfxd8 16. Rfd1 e6 17. Kf2 Nd7 18. Be3 Bf8 19. Rac1 {½-½ (53) Dastan,B (2480)-Ozer,O (2374) Istanbul 2016}) 15... Qc7 16. Qf2 Rfe8 17. Rac1 Nd7 18. Nb5 Qb8 19. Ba7 Qd8 {[#] Threatens to win with ...Qa5.} 20. Bd4 Bh6 (20... Qa5 $11 21. Bxg7 Kxg7) 21. f4 Nf6 22. e5 $36 {[%mdl 2048] White is pushing.} Nd5 23. Qh4 Nxf4 (23... Bf8 $14) 24. Rxf4 $18 Bxf4 25. Qxf4 Qd5 {[%csl Gc6][%cal Rd5g2]} 26. Qf2 ({Weaker is} 26. Qf3 Qxd4+ 27. Nxd4 Bxf3 $14) 26... Bxb5 27. Rc5 {[#]} Qe4 (27... Qxd4 $142 $1 {[%mdl 512]} 28. Qxd4 Bxe2) 28. Rxb5 Red8 29. Bc3 Rac8 30. Rb4 Qc2 31. Rf4 $2 (31. Rxb7 $18 Qc1+ 32. Bf1 Rxc3 33. bxc3 Qxa3 34. Rc7) 31... Rxc3 $15 32. bxc3 Rd2 33. Rxf7 {Rf8+ is the strong threat.} Rxe2 {[%mdl 4096] Endgame KQR-KQR} ({Black should try} 33... Qc1+ $15 34. Qf1 Qxf1+ 35. Rxf1 Rxe2) 34. Rf8+ $11 Kg7 35. Rf7+ Kg8 36. Rf8+ Kg7 37. Qf7+ $2 (37. Rf7+ $11 {and White has nothing to worry.} Kg8) 37... Kh6 $19 38. Qf4+ g5 39. Qg3 Qc1+ $2 (39... Qe4 $19 {Strongly threatening ...Re3.} 40. Rf1 Qxe5 41. Qxe5 (41. Qh3+ $2 Kg7 $19) 41... Rxe5) 40. Rf1 $11 Qe3+ 41. Qxe3 Rxe3 42. Rb1 Rxc3 {Hoping for ...Rb3.} 43. Rxb7 {The position is equal.} Rxa3 {aiming for ...Kg6.} 44. Rxe7 Kg6 45. g4 {Precision: White = 67%, Black = 43%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Gonzalez Acosta, Bernal"]
[Black "Franco Valencia, Beatriz Irene"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2494"]
[BlackElo "2173"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,117,47,44,55,23,59,48,54,41,45,51,87,20,58,0,14,0,38,0,75,85,114,114,154,139,201,171,150,149,157,140,198,186,199,184,252,242,237,237,300,273,248,262,259,239,291,261,244,240,269,258,253,257,304,170,163,91,155,163,163,160,183,194,194,209,202,208,262,283,391,383,394,388,390,394,379,280,262,93,375,381,383,383,1035,948,673,362,299,37,37,12,59,12,12,12,12,8,8,8,235,252,1836,255,7822,6424,5473,5409,29987,29988]} 1. e4 g6 2. Nc3 Bg7 3. d4 d6 4. Be3 a6 5. Qd2 b5 6. f3 Bb7 {B06: Modern Defence} (6... Nf6 7. O-O-O Nbd7 8. Bh6 Bxh6 9. Qxh6 b4 10. Nce2 e5 11. dxe5 dxe5 12. Kb1 Qe7 13. Nc1 Qf8 14. Qh4 Qe7 15. Qh6 Qf8 16. Qe3 Qc5 17. Qh6 {½-½ (17) Grischuk,A (2737)-Dubov,D (2660) Doha 2016}) 7. h4 {[%cal Bh2h4,Bh4g5][%mdl 32]} h6 8. Nh3 Nd7 {White is slightly better.} 9. O-O-O (9. h5 $5) 9... Ngf6 10. g4 c5 11. g5 (11. Kb1 $16) 11... hxg5 $11 12. hxg5 Nh5 13. Nf2 $146 {[%mdl 2048] White has the initiative.} ({Predecessor:} 13. dxc5 Ng3 14. Rh2 Nxf1 15. Rxf1 dxc5 {1-0 (30) Suvorov,S (2277)-Borisov,M Angarsk 2016}) 13... Qa5 {White must now prevent ...b4.} 14. Kb1 c4 (14... Ng3 $11 15. Rxh8+ Bxh8) 15. a3 $16 Qc7 16. Bh3 O-O-O 17. Bg4 Ng3 (17... Kb8 $16 18. f4 Ng3) 18. Rxh8 Rxh8 19. Rg1 Nh5 20. Rh1 Ng3 (20... Qd8 $16 21. Rh3 Kb8) 21. Rxh8+ $18 Bxh8 22. Qe1 Qb6 (22... Bg7 $142 23. Nfd1 Nh5) 23. Nfd1 Nh5 24. Ne2 Ng7 25. Qh4 Qd8 26. Qh3 {aiming for Bxd7+.} e6 {[#]} 27. d5 $1 {[%mdl 512]} Qg8 (27... exd5 28. Bxd7+) 28. a4 Ne5 29. axb5 axb5 30. Nd4 Nxg4 31. Qxg4 b4 32. Qg3 (32. Nb5 $142 Kd7 33. Bf4) 32... Ne8 33. Qe1 ({Better is} 33. Nb5 $1 $18 {[%cal Rb5d6]} Be5 34. Qe1) 33... exd5 (33... c3 $142) 34. Qxb4 $16 Bxd4 35. Bxd4 {Nc3 is the strong threat.} Qf8 36. Nc3 dxe4 37. Qxc4+ Kd7 38. Qa4+ Bc6 39. Qa7+ Nc7 {[#]} 40. Bb6 $1 Qc8 41. Nxe4 Qb7 42. Qxb7 Bxb7 43. Bxc7 Kxc7 $18 {[%mdl 4096] Endgame KB-KN} 44. c4 $2 (44. b4 $18 {is more deadly.}) 44... d5 $2 {[%mdl 8192]} (44... Kc6 $16 {keeps fighting.}) 45. cxd5 Bxd5 46. Kc2 Bc6 $2 (46... Bc4 47. Kc3 Be2) 47. Kd3 Kd7 48. Ke3 Ke6 49. Kf4 $2 ({White should try} 49. Nf6 $18) 49... Kd5 $1 $14 50. b4 Bb7 51. Nc5 Bc8 52. Nd3 {Threatens to win with b5.} Bf5 53. Ne5 Be6 54. Ng4 {Black should prevent Ne5.} Bc8 $2 {[#]} (54... Kc4 $11 {and Black stays safe.}) 55. b5 $1 $18 Bb7 $2 (55... Be6 56. Nh6 Kd6) 56. b6 $2 (56. Ne5 Ke6 57. Nc4) 56... Kc5 $2 (56... Kd6 57. Ne5 Bd5) 57. Ne5 Bd5 {[#]} 58. Nxf7 $1 {[%mdl 512]} Be4 (58... Bxf7 59. b7) 59. Kxe4 {Precision: White = 53%, Black = 20%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Hungaski, Robert Andrew"]
[Black "Peralta, Fernando"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2492"]
[BlackElo "2569"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,52,11,14,14,6,14,20,23,17,14,0,5,-18,-27,-19,-23,-9,0,0,0,0,0,0,0,0,0,1,4,0,2,2,8,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. g3 d5 3. Bg2 Bf5 4. O-O e6 5. c4 c6 6. cxd5 exd5 7. d3 Na6 {A11: English Opening: 1...c6} 8. Nc3 Be7 9. a3 $146 ({Predecessor:} 9. Nd4 Bg4 10. h3 Bd7 11. e4 dxe4 12. dxe4 O-O 13. e5 Ne8 14. Be3 Nec7 15. f4 {0-1 (45) Fressinet,L (2687)-Savchenko,B (2633) Almaty 2016}) 9... O-O 10. Nd4 Bg6 11. b4 Nc7 12. e4 a5 13. Rb1 axb4 14. axb4 dxe4 {The position is equal.} 15. dxe4 Re8 16. Bf4 Bf8 {[%cal Rf6e4]} 17. Nxc6 Qxd1 18. Rfxd1 bxc6 19. Bxc7 Nxe4 20. Nxe4 Bxe4 21. Bxe4 Rxe4 22. Bd6 g6 23. Bxf8 Rxf8 24. Rdc1 Rb8 25. Rxc6 {Threatening b5.} Rexb4 26. Rxb4 Rxb4 {Precision: White = 68%, Black = 82%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Leiva, Giuseppe"]
[Black "Kovalyov, Anton"]
[Result "0-1"]
[ECO "E06"]
[WhiteElo "2449"]
[BlackElo "2643"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,84,4,0,0,0,22,-8,7,2,8,0,0,0,6,-10,17,18,6,0,1,0,0,0,0,-29,-22,-26,-25,-41,0,-13,-11,-13,-8,-22,0,-17,-10,-11,0,2,43,-31,-42,-29,-64,-33,-46,-98,-109,-150,-149,-135,-125,-123,-141,-135,-100,-169,-166,-240,-220,-234,-226]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 Be7 5. Bg2 O-O 6. O-O c6 7. Qc2 b6 8. Bf4 Nbd7 9. Rd1 Bb7 10. Ne5 Nh5 11. Bd2 Nhf6 12. Bf4 $146 ({Predecessor:} 12. cxd5 cxd5 13. Nc6 Bxc6 14. Qxc6 Rc8 15. Qb5 Ne8 16. Qd3 Nd6 17. Nc3 Nf6 18. b3 Qd7 19. Rac1 Rfd8 20. Rc2 Nde4 21. Be1 {½-½ (22) Radjabov,T (2710)-Gelfand,B (2724) Moscow 2017}) 12... Nh5 {E08: Closed Catalan: Main Line: 7 Qc2} 13. Bd2 f5 14. Bc3 Nhf6 {The position is equal.} 15. Nd2 {[%cal Bb1d2,Bd2f3,Bf3e5][%mdl 32]} a5 (15... Ne4 $5) 16. Ndf3 Bd6 17. b3 Ne4 18. Bb2 Rc8 19. Nxd7 Qxd7 20. Ne5 Qe7 21. f3 Nf6 22. e3 c5 23. Qf2 cxd4 24. exd4 Rc7 25. Bf1 Rfc8 (25... f4 $5 26. g4 Nd7 $11) 26. Re1 Nd7 27. Nxd7 Qxd7 28. Rac1 Kf7 29. Rc2 dxc4 30. bxc4 b5 {[%cal Rb5c4,Bb6b5,Bb5a4,Ba4a3,Ba3a2][%mdl 32]} 31. c5 {Black should prevent Rce2.} Bd5 32. a4 ({White should try} 32. Bc1 $14) 32... bxa4 $15 33. Ba6 Be7 34. Bxc8 Rxc8 35. Bc3 (35. g4 $15) 35... a3 $17 36. Bd2 Qa4 $36 {[%mdl 2048] Keeping White busy.} 37. Bf4 Bf6 38. Be5 Bxe5 39. dxe5 {[#]} Qb3 $1 40. Rcc1 (40. Rec1 $17 {was worth a try.}) 40... a2 $19 {[%mdl 1024] Black is clearly better. Black has strong compensation.} ({Weaker is} 40... Bxf3 41. Qe3 $15) (40... Qxf3 41. Qxf3 Bxf3 42. Re3 $16) 41. Re2 (41. Rc2 {was necessary.}) 41... Qa3 42. Ra1 Rxc5 {Precision: White = 38%, Black = 61%.} ({Don't play} 42... Qxc5 43. Qxc5 Rxc5 44. f4) 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Pulvett Marin, Daniel"]
[Black "Pichot, Alan"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2437"]
[BlackElo "2577"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,61,0,12,13,44,43,37,46,40,43,44,45,30,7,41,40,43,38,39,34,41,25,22,25,41,31,36,44,34,20,79,31,137,70,78,73,68,29,42,0]} 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 a5 5. Bg2 O-O 6. Nf3 b6 7. O-O Bb7 8. Bf4 Be7 9. Nc3 Ne4 10. Qc2 Nxc3 11. Qxc3 d6 12. Rad1 Nd7 {LiveBook: 5 Games} 13. Qc2 {E16: Queen's Indian: 4 g3 Bb7 5 Bg2 Bb4+} f5 14. Ng5 Bxg5 15. Bxb7 Rb8 16. Bxg5 Qxg5 17. Bc6 $146 ({Predecessor:} 17. f4 Qg6 18. Bf3 Nf6 19. e3 Rfc8 20. a3 c6 {½-½ (44) Krasenkow,M (2485)-Rajskij,E Nabereznye Chelny 1988}) 17... Nf6 18. f4 Qh6 19. e4 fxe4 20. Bxe4 e5 21. Bc6 Kh8 22. Qe2 $36 {[%mdl 2048] White has good play.} exf4 23. Rxf4 Ng8 24. Rdf1 Rxf4 25. Rxf4 Qg6 26. Qe4 Qh5 (26... Qxe4 $11 {remains equal.} 27. Rxe4 Rf8) 27. Kg2 Qd1 (27... Nf6 $14 28. Qe7 Rg8) 28. Rf1 (28. Qe6 $16) 28... Qd2+ $14 29. Rf2 Qd1 30. Qh4 Qe1 31. Qe4 {Precision: White = 36%, Black = 42%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Fernandez, Fernando"]
[Black "Bacallao Alonso, Yusnel"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "2416"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "104"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,104,13,17,25,24,49,-14,-20,-4,-15,-21,-25,-34,-35,-62,-62,-46,-24,-20,7,2,12,-6,0,0,0,-25,-14,-24,-22,-32,-27,-33,-14,-21,-14,-45,-29,-37,-38,-47,-10,-12,0,0,32,-14,-7,-5,-4,-22,-22,-22,-22,-22,-22,-22,-22,-27,-27,-45,-8,-70,-76,-111,-41,-112,-112,-318,-277,-409,-355,-205,-132,-132,-114,-1631,-1606,-6099,-5984,-29973,-29974,-29974,-29974,-29981,-29982,-29982,-29983,-29990,-29991,-29993,-29994,-29994,-29995]} 1. e4 c6 {[%cal Bc7c6,Bc6c5][%mdl 32]} 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 c5 6. c3 Nc6 7. O-O h6 {B12: Caro-Kann: Advance Variation} (7... a6 8. Be3 c4 9. Nbd2 h6 10. g3 Nge7 11. Nh4 Bh7 12. Bg4 b5 13. f4 Qd7 14. b4 Bd3 15. Be2 Bxe2 16. Qxe2 {½-½ (40) Najer,E (2679)-Anton Guijarro,D (2679) Poikovsky 2017}) 8. Be3 Qb6 9. dxc5 (9. Na3 $14) 9... Bxc5 $11 {The position is equal.} ({Don't play} 9... Qxb2 10. Qb3 $14) 10. Bxc5 Qxc5 11. Qa4 $146 ({Predecessor:} 11. Na3 Nge7 12. b4 Qb6 13. b5 Na5 14. Nd4 Qc5 15. Qa4 {0-1 (36) Vogiatzis,D (2033)-Heyne,M (2154) Fuerth 2001}) 11... Nge7 12. Nbd2 O-O 13. Qb5 Qxb5 14. Bxb5 Rfc8 (14... a6 $5 {[%cal Ra6b5]} 15. Bxc6 bxc6 $15) 15. Rfe1 Na5 (15... a6 $5 {[%cal Ra6b5]} 16. Bf1 Rc7 $15) 16. Nd4 Bg6 17. a4 a6 18. Bf1 Nec6 19. N2f3 Be4 20. Re3 Rc7 21. b4 Nxd4 22. Nxd4 Nc6 23. Nxc6 Rxc6 24. a5 (24. c4 $5) 24... Bg6 25. f4 Rac8 26. Ra3 $1 d4 27. cxd4 Rc1 28. Kf2 Rd8 29. b5 axb5 $1 ({Of course not} 29... Rxd4 $6 30. bxa6 bxa6 31. Bxa6 $16) 30. Bxb5 Rxd4 31. Kg3 Be4 32. a6 bxa6 33. Bxa6 g5 $36 {[%mdl 2048] Black has good play.} 34. fxg5 hxg5 35. Be2 Rc5 36. Bf3 Rxe5 37. Re2 (37. Ra1 $11) 37... Kg7 $15 38. Rc3 f5 (38... Kf6 $17 39. Rce3 Bxf3 40. Rxf3+ Rf5) 39. Kf2 ({Better is} 39. Rc1 $15) 39... Kf6 $17 40. Rce3 $2 (40. Rc8 $17) 40... Bxf3 $19 41. gxf3 (41. Rxf3 {was necessary.} Rxe2+ 42. Kxe2) 41... Rxe3 42. Rxe3 {[%mdl 4096] Endgame KR-KR} Rd2+ 43. Kg1 f4 {[%cal Bf5f4,Bf4f3][%mdl 32]} 44. Ra3 $2 {[%mdl 8192] [#]} (44. Re4 $17) 44... g4 $1 {[%cal Rg4f3][%mdl 512]} 45. fxg4 {[#]} Kg5 $1 {[%cal Rg5g4]} 46. Ra6 e5 {[%cal Be6e5,Be5e4,Be4e3][%mdl 32] Black mates.} 47. Ra5 Re2 48. h3 f3 49. Kf1 Kf4 50. Ra8 e4 51. h4 e3 52. g5 Rb2 {Precision: White = 29%, Black = 52%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.12"]
[Round "4"]
[White "Zavarce, Oscar Enrique"]
[Black "Cruz, Cristhian"]
[Result "0-1"]
[ECO "B48"]
[WhiteElo "2364"]
[BlackElo "2558"]
[Annotator "TA"]
[PlyCount "102"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,102,35,34,33,49,27,83,87,103,79,83,84,81,60,65,51,76,29,20,20,43,-12,-16,-18,-16,-16,-16,-16,-16,-35,-36,-32,-35,-43,-40,-85,-90,-84,-84,-141,-158,-146,-124,-127,-125,-187,-174,-207,-222,-256,-261,-257,-252,-265,-268,-259,-263,-283,-275,-337,-314,-341,-324,-389,-394,-470,-471,-448,-451,-501,-433,-466,-481,-474,-460,-608,-603,-825,-821,-797,-794,-1014,-1001,-5800,-5522,-2323,-862,-29988,-29989,-29990,-29991]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qf3 {B48: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 without Be2} Nf6 {LiveBook: 187 Games} 8. O-O-O Be7 (8... Rb8 9. Be2 d6 10. Qg3 Nxd4 11. Bxd4 e5 12. Ba7 Ra8 13. Be3 b5 14. f4 Bb7 15. fxe5 Nxe4 16. Nxe4 Bxe4 {1-0 (42) Nepomniachtchi,I (2767)-Adhiban,B (2666) Doha 2016}) 9. Be2 {White is slightly better.} h5 (9... d6 $11 {keeps the balance.}) 10. Qg3 $16 Qxg3 11. hxg3 ({Don't play} 11. fxg3 $6 d6 $11) 11... Ne5 12. Nf3 $146 ({Predecessor:} 12. f3 b5 13. g4 Ng6 14. g5 Ng8 {1-0 (28) Lomasov,S (2393)-Zhao,C (2124) Khanty-Mansiysk 2016}) 12... Ng6 13. Bd4 b5 14. e5 Ng4 15. Bd3 Bb7 16. Ne4 Rc8 17. Rh3 (17. Nd6+ $14 Bxd6 18. exd6) 17... Bxe4 $11 18. Bxe4 Bc5 19. Bb7 Rc7 20. Bxa6 b4 21. Rd2 Ke7 22. Bb5 {[#] Strongly threatening Bxc5+.} Bxd4 23. Nxd4 {White wants to play f4.} N6xe5 24. Re2 {Threatens to win with f3.} Rc5 25. f3 Nf6 26. f4 (26. Ba4 $142) 26... Neg4 $17 27. Rh1 Ra8 28. Kb1 Kf8 29. c3 (29. Rc1 $17) 29... bxc3 $19 30. Rc1 {[#]} Rb8 $1 31. Rxc3 Rcxb5 32. Nxb5 Rxb5 33. a4 Ra5 34. b3 Nd5 35. Rc8+ Ke7 36. Rec2 Nge3 37. R2c5 Ra7 38. Kb2 Nxg2 39. Ka3 h4 40. gxh4 Ngxf4 41. Rb5 Nd3 42. h5 f5 {[%cal Bf7f5,Bf5f4,Bf4f3,Bf3f2][%mdl 32]} 43. Rbb8 Ne5 44. Rf8 Nf6 45. b4 f4 46. h6 gxh6 47. b5 f3 48. Rfc8 f2 49. Rc1 Nd5 50. Rf1 Nc4+ 51. Ka2 Rxa4+ {Precision: White = 37%, Black = 79%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Iturrizaga Bonelli, Eduardo"]
[Black "Mekhitarian, Krikor Sevag"]
[Result "1/2-1/2"]
[ECO "A09"]
[WhiteElo "2663"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,81,-48,-39,-49,-35,0,0,6,0,0,0,0,0,18,0,1,-5,0,0,0,0,0,0,0,0,18,0,21,0,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 c5 2. c4 Nf6 3. g3 d5 4. Bg2 Nc6 5. O-O d4 6. e3 e5 7. exd4 exd4 8. Re1+ Be7 9. d3 O-O 10. Ne5 Nxe5 11. Rxe5 Bd6 {A09: Réti Opening: 1 Nf3 d5 2 c4} 12. Re1 h6 (12... Bg4 $5 {[%cal Rg4d1]} 13. Bf3 Qc8 $15) 13. Nd2 {[#] The position is equal.} Rb8 $146 (13... Bg4 $5 {[%cal Rg4d1]} 14. Bf3 Bxf3 15. Qxf3 Qd7 $15) ({Predecessor:} 13... Bg4 14. Bf3 Bxf3 15. Qxf3 Re8 16. Ne4 Nxe4 17. Rxe4 Rxe4 {½-½ (17) Gurevich,M (2596)-Kaidanov,G (2586) Rockville 2012}) 14. Ne4 Nxe4 15. Bxe4 Qd7 16. Bd2 b6 17. Qf3 Qg4 18. Qg2 Bf5 19. Bxf5 Qxf5 20. Re4 Rfe8 21. Rae1 Rxe4 22. Rxe4 h5 23. b3 (23. b4 $5) 23... a5 24. a4 Rd8 25. h4 Kf8 26. Bf4 Bxf4 27. Qf3 Re8 $1 28. Rxf4 $11 {[%mdl 4096] Endgame KQR-KQR} Qh3 $1 {[%cal Re8e1] [#]} 29. Re4 Rxe4 30. Qxe4 {KQ-KQ} g6 31. Qe5 (31. Qc6 {feels hotter.} Qe6 32. Qb7 Kg7 33. Qc7 Qf6 34. Qb7) 31... Qe6 32. Qxe6 fxe6 {KP-KP} 33. Kg2 e5 34. Kf3 Kf7 35. Ke4 Ke6 36. f3 Kd6 37. g4 {[#] Hoping for gxh5.} Ke6 {...g5 is the strong threat.} 38. gxh5 gxh5 39. f4 exf4 40. Kxf4 Kf6 41. Ke4 {Precision: White = 55%, Black = 58%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Cordova, Emilio"]
[Black "Ynojosa Aponte, Felix Jose"]
[Result "1/2-1/2"]
[ECO "D05"]
[WhiteElo "2651"]
[BlackElo "2395"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,119,12,15,13,0,0,0,14,12,12,0,23,24,24,-14,-14,-10,6,0,0,0,0,0,189,57,53,61,74,72,72,72,73,65,70,60,63,75,49,66,59,24,33,0,0,0,0,0,0,0,4,0,0,0,29,-22,23,20,23,27,24,23,29,18,12,11,12,10,12,15,18,0,0,-5,-5,-18,-8,-11,0,0,0,0,0,0,0,0,0,0,-19,-51,-52,-73,-29,-39,-8,-8,-8,-12,0,-22,0,0,0,0,0,0,0,0,-19,-44,0,0]} 1. Nf3 c5 2. e3 Nf6 3. d4 e6 4. Bd3 d5 5. b3 Nc6 6. Bb2 b6 {D05: Colle System with ...e6} (6... Bd6 7. O-O O-O 8. Nbd2 b6 9. dxc5 Bxc5 10. c4 dxc4 11. Nxc4 Bb7 12. Qe2 Qe7 13. Ng5 Rfd8 14. Bxf6 Qxf6 15. Bxh7+ Kf8 16. Ne4 {0-1 (39) Wojtaszek,R (2749)-Ganguly,S (2668) Doha 2016}) 7. Nbd2 Bb7 8. O-O Bd6 9. Re1 O-O 10. e4 (10. dxc5 {is interesting.} Bxc5 11. a3 a5 12. Qe2 Rc8 13. c4) 10... dxe4 11. Nxe4 cxd4 12. Nxd6 Qxd6 13. Nxd4 {[#]} Rad8 $146 ({Predecessor:} 13... Rfd8 14. Nxe6 fxe6 15. Bxf6 gxf6 16. Qg4+ {½-½ (27) Finegold,B (2539)-Kaidanov,G (2577) Saint Louis 2010}) 14. Nb5 Qf4 {[#] aiming for ...Ng4.} 15. g3 (15. Bxf6 Qxf6 16. Qh5 g6 $17) 15... Qg5 16. Ba3 $36 {[%mdl 2048] Black is under pressure.} g6 $2 (16... Ne5 $2 17. f4 $18) (16... Qd5 $11 17. Bc4 (17. Bxf8 Ne5 $11) 17... Qf5) 17. h4 (17. Bxf8 $18 Kxf8 18. Qf3) 17... Qd5 $14 18. Bc4 $1 {[%cal Rc4d5]} (18. Bxf8 Ne5 $17) 18... Qf5 {[#]} 19. Nd6 $1 {[%cal Rd6f5]} Rxd6 20. Qxd6 {[%csl Ga3][%cal Rd6f8]} (20. Bxd6 $2 {perishes.} Rd8 $17) 20... Rd8 21. Qf4 Qxf4 22. gxf4 {And now Red1 would win.} Nd4 $1 23. Red1 $1 Nh5 24. f3 Bxf3 ({Don't go for} 24... Nxf4 $2 25. Kf2 $18) 25. Be7 Rd7 26. Bb5 Bxd1 27. Bxd7 Bxc2 28. Bd6 Nxf4 29. Bxf4 Ne2+ 30. Kh2 Nxf4 $11 {[%mdl 4096] Endgame KRB-KBN} 31. Rc1 Be4 32. Rc8+ Kg7 33. Rc7 a5 34. Be8 Kf6 35. Rxf7+ Ke5 36. Rxh7 g5 $1 37. Rh6 gxh4 $1 38. Rxh4 Ne2 39. Rh5+ Bf5 40. Ba4 Nc3 41. Rh8 b5 ({Much weaker is} 41... Nxa2 42. Rb8 $16) 42. Bxb5 Nxb5 43. Ra8 Kf4 44. Rxa5 Nd4 45. b4 $1 Kf3 46. Kg1 $1 Bd3 47. a4 Nc6 48. Rh5 Nxb4 49. Rh3+ Ke2 {Threatens to win with ...e5.} 50. Rh4 Na6 {next ...e5 is good for Black.} 51. Kg2 e5 52. Kg3 Ke3 53. a5 e4 {...Bc4 is the strong threat.} 54. Rh8 Kd2 {White must now prevent ...e3.} 55. Rh2+ Kc3 56. Kf4 Nb4 57. Rh6 Kd4 (57... e3 $5 58. Kxe3 Bb5 $11) 58. Rd6+ Nd5+ 59. Kg3 $1 Kc5 (59... Ke5 $5 {[%cal Re5d6]} 60. Rc6 Ne7 $17) 60. Rh6 {Precision: White = 68%, Black = 70%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Bruzon Batista, Lazaro"]
[Black "Vasquez Schroeder, Rodrigo"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2650"]
[BlackElo "2553"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,64,14,14,0,14,9,20,16,15,19,15,11,53,38,41,40,39,16,11,-28,0,0,27,27,34,27,55,58,73,54,96,97,129,133,116,94,222,212,435,428,643,628,739,735,839,845,1161]} 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. h3 g6 5. Bd3 Bg7 6. Bc2 Nc6 7. d4 cxd4 8. cxd4 d5 9. e5 Ne4 10. O-O O-O {LiveBook: 62 Games} 11. Be3 {B50: Sicilian: 2...d6, Miscellaneous} Bf5 $146 ({Predecessor:} 11... f6 12. exf6 exf6 13. Nc3 Nxc3 14. bxc3 Be6 15. Re1 Qd7 16. Nh2 Bf5 17. Ba4 a6 18. Ng4 b5 {½-½ (55) Andreikin,D (2737)-Lobanov,S (2429) Tallinn 2016}) 12. Nh4 Be6 13. Nd2 {The position is equal.} Nxd2 14. Qxd2 Qa5 {[#] ...Qxd2 is the strong threat.} 15. Qd1 f5 16. f4 Bd7 17. g4 e6 18. Ng2 Rac8 19. Bd2 Qb6 {Strongly threatening ...fxg4.} (19... Qa6 $5 {[%cal Rc6d4]} 20. Bc3 b5 $15) 20. Bc3 Na5 21. Kh2 Nc4 22. Rb1 Qc7 23. Bd3 Rf7 24. Rf3 Qd8 25. Rg3 Be8 26. Qe2 Kh8 27. Rg1 Na5 (27... Bh6 $16 {was called for.}) 28. gxf5 $18 gxf5 $2 (28... exf5 29. h4 Bf8) 29. Ne3 {White is clearly winning.} Nc6 (29... b6 $142 30. Qg2 Rcc7 31. Bxf5 exf5) 30. Qg2 {[%cal Rg3g7]} Rcc7 {[#]} 31. Bxf5 $1 {[%mdl 512]} exf5 32. Nxd5 Qxd5 {Precision: White = 79%, Black = 16%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Kovalyov, Anton"]
[Black "Gonzalez Acosta, Bernal"]
[Result "1-0"]
[ECO "D12"]
[WhiteElo "2643"]
[BlackElo "2494"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,69,26,38,39,41,29,49,30,37,14,42,38,44,46,39,36,37,39,34,8,31,29,35,41,64,67,20,35,130,118,135,113,215,202,272,263,257,148,343,185,179,190,154,151,592,564,580,552,29955,5924,5647,4480,29987,29988,29990,29991]} 1. c4 c6 2. d4 d5 3. Nf3 Nf6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 8. Qb3 Qc7 9. Bd2 {D12: Slav Defence: 3 Nf3 Nf6 4 e3 Bf5} Be7 (9... a6 10. Rc1 dxc4 11. Bxc4 Nbd7 12. a4 Be7 13. g3 Bh5 14. O-O O-O 15. Ng2 Rad8 16. Nf4 Kh8 {½-½ (34) So,W (2822)-Caruana,F (2817) chess.com INT 2017}) 10. g3 a6 11. Rc1 {White is slightly better.} dxc4 12. Qxc4 b5 (12... Bh5 {feels hotter.} 13. Qe2 c5 14. b4 b6 15. bxc5 bxc5 16. Na4 Ne4) 13. Qe2 Nbd7 14. Nxg6 hxg6 15. f4 $146 ({Predecessor:} 15. e4 Qa7 16. Be3 c5 {½-½ (49) Rojas Keim,L (2437)-Handke,F (2494) Collado Villalba 2010}) 15... Rd8 16. Bg2 c5 17. e4 {With the idea e5.} Qb8 18. d5 e5 19. b3 Nh5 {[%cal Re5f4]} 20. O-O c4 21. Be3 exf4 (21... Rc8 $14) 22. gxf4 $16 b4 23. Na4 (23. Qxc4 bxc3 24. Rxc3 g5 $1 $17 {[%mdl 512]}) 23... g5 {[#]} (23... c3 $16) 24. e5 $1 $18 {And now d6 would win.} (24. bxc4 Nxf4 25. Bxf4 gxf4 $14) (24. fxg5 $2 Qxh2+ 25. Kxh2 Nf4+ 26. Kg3 Nxe2+ 27. Kf2 Nxc1 $19) (24. Rxc4 Nxf4 25. Bxf4 gxf4 $15) 24... gxf4 25. Bd4 c3 26. Bf3 $36 {[%mdl 2048] White is really pushing.} ({White should play} 26. d6 $18) 26... Nf8 $2 (26... Qb5 $16 {keeps fighting.}) 27. Bxh5 (27. d6 $142) 27... Rxd5 28. Rxf4 g6 {White must now prevent ...Ne6.} 29. Qc4 ({Not} 29. Qxa6 Rxh5 30. Nb6 Rd8 $11) 29... Ne6 $2 (29... Qb5 $16 30. Be2 Qxc4 31. Bxc4 (31. bxc4 Ra5 $11) 31... Ne6 32. Bxd5 Nxf4) 30. Qc6+ ({Less strong is} 30. Qxd5 Nxf4 31. Qc6+ Kf8 $16) 30... Rd7 {[#]} 31. Rxf7 $1 Rxh5 32. Qxe6 {Nc5 would kill now.} Rg5+ 33. Kf2 {White wants to mate with Nc5.} Qd8 34. Rf4 {[%csl Gf4][%cal Re6f7]} Rc7 35. Nb6 {Precision: White = 81%, Black = 24%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Delgado Ramirez, Neuris"]
[Black "Erenburg, Sergey"]
[Result "1-0"]
[ECO "B13"]
[WhiteElo "2613"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "157"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,157,25,40,32,30,23,27,30,45,18,48,40,35,14,34,19,47,37,45,0,16,13,17,10,61,47,70,69,70,61,67,73,72,56,91,56,56,56,56,52,68,74,125,135,155,146,145,122,139,125,128,118,162,154,138,106,128,0,149,134,161,77,92,0,99,103,129,117,88,88,89,88,88,88,88,88,91,91,91,91,87,72,76,72,72,72,72,72,72,72,72,72,72,78,79,75,78,79,86,79,170,170,1921,1815,5285,5214,4850,3354,4939,4939,3180,2424,2445,2133,29974,29975,29978,29979,29979,29980,29980,29981,29981,29982,29981,29982,29982,29983,29983,29984,29984,29984,29986,29987,29987,29988,29988,29989,29989,29990,29990,29991]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. Bd3 Nc6 5. c3 Qc7 6. Ne2 Bg4 7. O-O {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack} e6 8. Qe1 Bxe2 9. Qxe2 Bd6 {LiveBook: 7 Games} 10. g3 Nf6 11. Nd2 O-O 12. Nf3 (12. f4 Rae8 13. Nf3 Nd7 14. Bd2 f5 {1-0 (34) Yu,Y (2729)-Dreev,A (2652) Doha 2016}) 12... Rfe8 13. Be3 $146 ({Predecessor:} 13. Bg5 Nd7 14. Rad1 a6 {½-½ (36) Jarmula,L (2466)-Svane,R (2552) Germany 2016}) 13... g6 14. Rad1 a6 15. a3 b5 16. Rfe1 (16. Bg5 $5 {[%cal Rg5f6]} Nd7 17. Qc2 $14) 16... Na5 17. Bg5 Nd7 18. Ne5 Nc4 {[%cal Rd6e5]} 19. Ng4 f5 20. Ne3 Nxe3 (20... Kg7 $11) 21. Qxe3 $14 Nb6 22. Qf3 Nc4 23. Re2 Qf7 24. Rde1 Rac8 25. h4 Bf8 26. Kg2 h5 27. Qf4 Kh7 28. f3 Bd6 29. Qc1 Rc6 ({Black should try} 29... Qd7) 30. g4 $1 $16 Bb8 (30... hxg4 31. fxg4 e5 32. gxf5 $14) 31. gxh5 gxh5 32. Kh3 Rg8 33. Rg1 Rg7 34. Qe1 Nb6 35. f4 Nc4 36. Reg2 Rc8 37. Re2 Rc6 $1 38. Rg3 Rg8 39. Kg2 (39. Qd1 $18 {is more deadly.}) 39... Rg6 40. Kh3 ({Better is} 40. Kh1 $16) 40... Nd6 (40... Rg8 $1 $11) 41. Rg1 Ne4 42. Reg2 Rc8 43. Be2 Nf6 44. Bxf6 Rxg2 45. Rxg2 Qxf6 46. Qf2 Rg8 {[#]} 47. Rg5 $1 (47. Bxh5 $6 Rxg2 48. Kxg2 Qh6 $11) 47... Rxg5 48. hxg5 Qh8 49. Qh4 Kg6 50. Kg3 Qh7 51. Kf2 Qh8 52. Ke3 Qh7 53. Kd2 Qh8 54. Kc2 Qh7 55. b4 Bd6 56. Kb3 Qh8 57. a4 bxa4+ 58. Kxa4 Kg7 (58... Bc7 $16) 59. Kb3 $18 ({Stronger than} 59. Qxh5 Qxh5 60. Bxh5 Bxf4 $11) ({Don't do} 59. Bxh5 $6 Qh7 $16) 59... Qb8 $2 (59... Kf7 60. Bxa6 (60. Bxh5+ Kf8 $16) 60... Kg6) 60. Qxh5 Qh8 61. Qxh8+ Kxh8 62. Bxa6 Bxf4 {[%mdl 4096] Endgame KB-KB} 63. Bc8 e5 {[#]} 64. dxe5 $1 Kg7 65. Bxf5 Bxg5 66. Be6 {White mates.} Bf4 67. Bxd5 Bxe5 68. c4 {[%cal Bc3c4,Bc4c5][%mdl 32]} Kf6 69. c5 Ke7 70. b5 {[%cal Bb4b5,Bb5b6][%mdl 32]} Bd4 71. Kc4 Bf2 72. b6 Kd8 73. Kb5 Kc8 74. Be6+ Kb8 75. c6 Bg3 76. Bf5 Bf4 77. Kc4 Bg3 78. Kd5 Bf4 79. Ke6 {Precision: White = 65%, Black = 42%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Pichot, Alan"]
[Black "Umetsubo, Cesar Hidemitsu"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2577"]
[BlackElo "2381"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,60,16,33,2,35,24,39,0,0,8,205,10,16,0,7,0,153,0,588,416,29991,29992,29992,29990,29993,29994,29994,29995,29995,29996,29996,29997,29997,29998,29998,29999,29999]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Nc6 7. O-O Be7 8. c4 Nb4 9. Be2 O-O 10. Nc3 Bf5 11. a3 Nxc3 12. bxc3 Nc6 13. Re1 Re8 14. Ra2 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves} dxc4 (14... Na5 15. cxd5 Qxd5 16. Rb2 c6 17. Ne5 Bxa3 18. Bf3 Qd6 19. Rbe2 Bxc1 20. Qxc1 Be6 21. Be4 Rad8 {1-0 (37) Nakamura,H (2787)-Akobian,V (2615) Saint Louis 2016}) 15. Bxc4 Na5 16. Bxf7+ $146 {White is slightly better.} ({Predecessor:} 16. Bd3 Bxd3 17. Qxd3 Bf6 18. Rae2 Rxe2 19. Qxe2 Qd7 20. Bf4 c6 21. Ne5 Bxe5 22. Qxe5 {½-½ (44) Melia,S (2422)-Turova,I (2379) St Petersburg 2009}) 16... Kxf7 17. Rae2 {next Re5 is good for White.} Bd7 $2 (17... Bg6 $11) 18. Re5 $2 ({Avoid the trap} 18. Ne5+ $2 Kg8 $19) (18. Qc2 $1 $18 {[%cal Rc2a2]} Nc6 19. Qxh7) 18... Nc6 $11 {aiming for ...Kg8.} 19. Qb3+ Kf8 20. a4 {Hoping for Rxe7!} h6 $2 (20... g5 $1 $11) 21. R1e4 $2 $40 {[%mdl 128] White is up to no good.} ({White must play} 21. Rh5 $1 $16 {[%cal Rh5h6] Intending Rxh6! and mate.} g5 22. Rxh6) 21... a5 $2 {[%mdl 8192]} (21... g5 $11 22. h4 Bf6 23. Rxe8+ Bxe8) 22. Ba3 g6 {[#]} ({Inferior is} 22... g5 23. Rxg5 $1 {[%mdl 512]} hxg5 24. Nxg5 Ne5 25. Rxe5 Be6 26. Nxe6+ Kf7 27. Nxd8+ Kg7 28. Qf7+ Kh8 29. Rh5#) (22... Bxa3 $18 23. Rf4+ Qf6 24. Qxa3+ Ne7 25. Rxf6+ gxf6) 23. Rf4+ $1 {White mates.} Bf5 24. Rexf5+ gxf5 25. Rxf5+ Kg7 26. Rf7+ Kg6 27. Qe6+ Bf6 28. Nh4+ Kh5 29. Qf5+ Bg5 30. Qf3+ Kxh4 31. Qh3# {Precision: White = 48%, Black = 20%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Peralta, Fernando"]
[Black "Cori Quispe, Kevin Joel"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2569"]
[BlackElo "2390"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,100,22,25,26,31,50,52,68,64,81,77,89,93,110,101,124,56,66,66,65,58,89,76,83,83,84,67,74,68,64,65,76,67,110,118,152,134,133,117,152,84,81,72,71,73,95,91,113,29,40,29,54,49,124,7,7,7,8,7,7,7,7,7,7,7,7,7,11,5,6,2,6,0,15,0,8,8,8,8,10,0,0,0,0,-8,-8,-8,-8,-8,-8,-8,-8]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 O-O 5. a3 Be7 6. e4 d6 {E11: Bogo-Indian} 7. Be2 c5 8. d5 e5 {White is slightly better.} 9. Qc2 g6 10. Nf1 $146 ({Predecessor:} 10. Nb1 Nh5 11. Nc3 Nd7 12. Bh6 Ng7 13. g4 Nf6 14. h3 {1-0 (33) Ponomariov,R (2711)-Rubio Mejia,L (2458) Linares 2015}) 10... Nh5 11. Bh6 Ng7 12. h4 Nd7 13. h5 (13. Ne3 $16) 13... Nf6 14. hxg6 fxg6 15. Ne3 Qa5+ 16. Kf1 Ng4 17. Nxg4 Bxg4 18. Qd2 Qxd2 19. Nxd2 Bd7 20. g3 a6 21. Kg2 b5 22. b4 Rfc8 23. Rhc1 Ne8 24. Be3 Rab8 25. Rab1 (25. bxc5 $142 dxc5 26. f4) 25... cxb4 $16 26. axb4 {Hoping for c5.} bxc4 27. Nxc4 Bb5 28. Bf1 Bd8 29. f4 (29. Na5 $16) 29... exf4 $11 30. gxf4 Rb7 31. Kf3 Re7 (31... h5 $14) 32. Bd4 (32. Nd2 $16 Rb8 33. Bxb5 axb5 34. Rc6) 32... Rec7 {[%cal Rb5c4] The position is equal.} 33. Bb6 Rxc4 34. Bxc4 Bxb6 35. Bxb5 Rxc1 36. Rxc1 axb5 37. Rc8 Kf7 38. Rb8 Bd4 39. Rxb5 {[#] And now Rb7+ would win.} Nf6 $1 40. Ra5 Ke7 41. b5 h6 42. Ra4 (42. Ra6 $5 {[%cal Rb5b6]} Nd7 43. e5 dxe5 44. fxe5 $11 (44. Rxg6 Nf6 $11)) 42... Bc5 43. Ra6 Nd7 44. e5 g5 45. exd6+ Bxd6 46. fxg5 hxg5 47. b6 Kf6 48. b7 Ke5 49. Kg4 Kxd5 50. Kxg5 Nb8 {Precision: White = 57%, Black = 42%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Cruz, Cristhian"]
[Black "Fier, Alexandr"]
[Result "1/2-1/2"]
[ECO "E48"]
[WhiteElo "2558"]
[BlackElo "2576"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,53,-6,0,0,0,-30,-25,-29,-28,-22,-40,-33,-27,-63,-29,-44,-42,-50,-15,-8,-4,-13,0,-6,0,-16,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nge2 cxd4 7. exd4 d5 8. cxd5 Nxd5 9. O-O Nc6 10. Be4 Nf6 11. Bf3 {E48: Nimzo-Indian: Rubinstein: 5 Bd3 d5 including 6 Ne2, but excluding 6 a3} h6 12. Qa4 (12. a3 Bd6 13. b4 e5 14. Bxc6 bxc6 15. dxe5 Bxe5 16. Bf4 Bxf4 17. Nxf4 a5 {½-½ (17) Aleksandrov,A (2639)-Kasimdzhanov,R (2702) Lugo 2009}) 12... Bd6 $146 ({Predecessor:} 12... Qa5 13. Qxa5 Nxa5 14. Bf4 Bd7 15. d5 exd5 16. Rfd1 Rfe8 17. b3 Rac8 18. Na4 b5 {0-1 (40) Drzemicki,D (2355)-Panczyk,K (2415) Slupsk 1992}) 13. Bxc6 {Black has an edge.} bxc6 14. Bf4 Bxf4 15. Nxf4 Qb6 16. b3 Bb7 17. Nd3 Ba6 18. Rfd1 Bxd3 (18... Bb5 $5 19. Qb4 Bxd3 20. Qxb6 axb6 21. Rxd3 Rfd8 $15) 19. Rxd3 {The position is equal.} Rfd8 20. Qc4 Rd6 21. Rad1 Rad8 22. h3 Nd5 23. Ne4 R6d7 24. Nc5 Rd6 25. Ne4 R6d7 26. Nc5 Rd6 27. Ne4 {Precision: White = 55%, Black = 66%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Bacallao Alonso, Yusnel"]
[Black "Henao, Bernardo Andres"]
[Result "1/2-1/2"]
[ECO "D12"]
[WhiteElo "2554"]
[BlackElo "2059"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,112,33,23,0,27,35,46,43,31,4,11,15,25,0,0,0,0,-29,29,32,46,4,15,8,18,3,16,0,64,57,81,83,143,143,143,143,135,95,95,95,97,100,104,75,85,65,88,83,121,121,121,121,121,121,143,143,200,147,150,150,162,105,105,105,105,99,105,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. b3 Nf6 2. Bb2 d5 3. Nf3 Bf5 4. e3 e6 5. c4 c6 6. Nc3 Nbd7 7. d4 Bd6 8. Bd3 Bg6 9. O-O O-O 10. Bxg6 {D12: Slav Defence: 3 Nf3 Nf6 4 e3 Bf5} (10. Qc2 Re8 11. Bxg6 hxg6 12. e4 Nxe4 13. Nxe4 dxe4 14. Qxe4 Qa5 15. Rfe1 Rad8 16. Qh4 Qh5 17. Qxh5 gxh5 {0-1 (72) Suleymanli,A (2356)-Volkov,S (2617) Nakhchivan 2017}) 10... hxg6 {LiveBook: 3 Games} 11. Qd3 e5 $146 (11... Re8 {is interesting.} 12. Rab1 e5 13. Qd1 e4 14. Ng5 Qe7) ({Predecessor:} 11... Re8 12. e4 dxe4 13. Nxe4 Nxe4 14. Qxe4 Nf6 15. Qc2 Nh5 16. Rfe1 Rc8 17. Rad1 Rc7 {1-0 (46) Skoberne,R (2083)-Zorat,P (1900) Nova Gorica 2005}) 12. cxd5 {White has an edge.} cxd5 {[#] ...e4 is the strong threat.} 13. dxe5 Nxe5 14. Qd1 Nxf3+ 15. Qxf3 Be5 16. Rfd1 Qa5 17. Rac1 Rad8 18. a3 d4 (18... Ne4 $142 19. b4 Qa6) 19. b4 $11 Qa6 20. Ne2 {[%cal Rb2d4]} d3 21. Nd4 Rc8 22. b5 Qa4 {Hoping for ...Rxc1.} 23. Rb1 Bxd4 (23... Qc4 $1 $11) 24. Bxd4 $14 Qxa3 25. Qxb7 Ra8 (25... Rc2 $142) 26. Qa6 $16 Qxa6 27. bxa6 Rfb8 28. f3 Rxb1 29. Rxb1 {[%mdl 4096] Endgame KRB-KRN} Nd5 30. Kf2 Rc8 31. Rd1 ({Inferior is} 31. Bxa7 Rc2+ 32. Kg3 Nc3 $17) 31... Rc2+ 32. Kg3 Nb4 33. Bxa7 d2 34. e4 ({Don't go for} 34. Ra1 $2 Rc1 $19) 34... Nxa6 35. Be3 Nc5 36. Rxd2 Rxd2 37. Bxd2 {KB-KN} f5 (37... f6 $16 38. h4 Kf7) 38. exf5 gxf5 39. Kf4 g6 40. Kg5 ({Better is} 40. h4 $18) 40... Kf7 41. Kh6 Ne6 42. Bc3 Nf4 {[#]} 43. g3 ({Only move:} 43. g4 $1 $16) 43... Ne2 $1 $11 {[%cal Re2c3] The position is equal.} 44. Bb2 {aiming for Kg5.} Ng1 45. f4 (45. h3 $5) 45... Nf3 46. h3 (46. Be5 $5) 46... Ng1 47. Bd4 Nxh3 48. Be3 Kf6 49. Bb6 Kf7 50. Bd4 g5 51. fxg5 (51. Kh5 $5 {[%cal Rf4g5]} Nxf4+ 52. gxf4 gxf4 53. Bh8 $11) 51... f4 52. g6+ Kg8 53. Kh5 fxg3 54. Kg4 g2 55. Kxh3 g1=Q 56. Bxg1 {Bd4 would kill now.} Kg7 {Precision: White = 64%, Black = 67%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Ramirez, Alejandro"]
[Black "Cori, Jorge"]
[Result "0-1"]
[ECO "A26"]
[WhiteElo "2552"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,120,33,30,32,33,33,23,30,19,23,17,74,35,36,17,23,3,0,1,94,82,92,104,168,95,146,-17,-19,-17,-12,-6,-9,0,0,-202,-206,-211,-221,-233,-207,-225,-214,-245,-119,-138,-126,-348,-346,-418,-418,-372,-411,-403,-403,-382,-379,-408,-410,-668,-668,-668,-668,-656,-583,-582,-587,-577,-563,-572,-516,-652,-534,-682,-677,-630,-640,-494,-279,-279,-279,-279,-279,-461,-279,-513,-279,-508,-279,-807,-781,-1807,-1899,-12841,-12842,-12841,-12842,-12845,-12845]} 1. c4 Nf6 2. Nc3 e5 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. e4 d6 7. Nge2 O-O 8. O-O Be6 9. h3 Qd7 10. Kh2 Ne8 11. Be3 f5 12. Qd2 Nf6 13. Nd5 Rf7 {A26: English Opening vs King's Indian with ...Nc6 and d3} (13... a5 14. Rac1 Nb4 15. a3 Nbxd5 16. cxd5 Bf7 17. Rc2 Rfc8 18. Rfc1 fxe4 19. dxe4 c6 20. Nc3 b5 21. dxc6 Rxc6 {1-0 (29) Maze,S (2577)-Ziska,H (2456) Reykjavik 2012}) 14. exf5 gxf5 15. Nec3 $146 ({Predecessor:} 15. f4 Re8 16. Rac1 Kh8 17. Nxf6 Bxf6 18. d4 exd4 19. Nxd4 Rg7 20. Nxc6 bxc6 21. Bd4 Bxd4 22. Qxd4 {1-0 (40) Westerman,H-De Kleijnen,H Netherlands 1985}) 15... Kh8 {White has an edge.} 16. f4 Rg8 17. Rae1 Ne8 (17... Nd4 $11 {keeps the balance.}) 18. Qe2 Rff8 19. Bh1 Nd8 20. fxe5 dxe5 21. Bg5 $1 {And now Ne7 would win.} Nc6 (21... Rf7 $11) 22. Qh5 $1 $16 Rf7 23. Qh4 a6 (23... h6 $16 24. a3 (24. Bxh6 $2 Bxh6 25. Ne4 Rh7 $19) 24... a6) 24. Bf3 (24. Ne4 $1 $18 {[%cal Re4c5]} fxe4 25. Bxe4) 24... Rff8 ({Better is} 24... h6 25. b3 (25. Bxh6 $2 Bxh6 26. Nxc7 Rh7 $19) 25... Qd6) 25. g4 $2 ({White should try} 25. Rd1 $16) 25... e4 $1 $11 {[%cal Re4f3]} 26. dxe4 fxg4 27. Bxg4 Bxg4 28. hxg4 Ne5 {Hoping for ...Nf3+.} 29. Kg3 $2 (29. Kg2 $11) 29... Ng6 $19 {[%mdl 1024] Black has strong compensation.} (29... Nxc4 30. Kg2 $15) 30. Qh5 Be5+ 31. Kg2 Ng7 $1 {[%cal Rg7h5]} ({Don't do} 31... c6 32. Ne3 $17) 32. Qh3 {[#] Bf6 is the strong threat.} Ne6 $1 {[%cal Re6g5]} 33. Bh6 {[#]} Ngf4+ (33... Rxf1 $1 $19 34. Rxf1 c6) 34. Nxf4 $17 Nxf4+ 35. Bxf4 $2 (35. Rxf4 $17 {was the only chance.} Rxf4 36. Bxf4 Rxg4+ 37. Kh1 Bxf4 38. Ne2) 35... Rxg4+ $19 ({Not} 35... Rxf4 36. Rxf4 Bxf4 37. Rd1 $17) (35... Bxf4 36. Ne2 $15) 36. Kh1 Rfxf4 37. Rxf4 Rg1+ $1 ({Less strong is} 37... Bxf4 38. Ne2 $17) 38. Kxg1 Qxh3 39. Rf2 Bd4 {( -> ...Qg3+)} 40. Ree2 h5 {[%cal Bh7h5,Bh5h4,Bh4h3][%mdl 32]} 41. Nd5 (41. Rd2 $142 Bb6 42. Rd8+ Kg7 43. Rdf8 Qg3+ 44. Kf1 Qd3+ 45. Kg2 Bxf2 46. Rxf2) 41... h4 42. Nf4 Qg3+ 43. Kf1 Bxf2 44. Rxf2 {[%mdl 4096] Endgame KQ-KRN} h3 {aiming for ...h2.} 45. Ne2 Qe3 46. Rf4 a5 47. b3 c6 48. Rh4+ Kg7 49. Rg4+ Kf6 50. Rg3 Qxe4 (50... Qh6 $142 51. Kg1 Ke5) 51. Rxh3 Qb1+ 52. Kf2 Qxa2 53. Re3 $2 (53. c5 {was necessary.}) 53... Qd2 54. Kf3 $2 (54. c5) 54... Qd1 55. Kf2 $2 (55. Rc3) 55... Kf7 56. Nf4 $2 (56. Rc3) 56... b5 {Black is clearly winning.} 57. cxb5 cxb5 58. Ne6 Qd2+ 59. Kf3 Qd5+ 60. Kf4 Kf6 {Precision: White = 29%, Black = 60%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Kaidanov, Gregory S"]
[Black "Zavarce, Oscar Enrique"]
[Result "1/2-1/2"]
[ECO "E14"]
[WhiteElo "2550"]
[BlackElo "2364"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,56,0,0,-8,-16,-23,-26,-28,-28,-35,-22,-53,-57,-50,0,-1,0,6,9,0,0,-28,7,0,0,0,794,0,0,-56,-24,-47,-47]} 1. Nf3 c5 2. c4 b6 3. e3 Nf6 4. d4 cxd4 5. exd4 e6 6. Nc3 Bb7 7. Bd3 Be7 8. O-O d5 9. cxd5 Nxd5 10. Ne5 O-O 11. Qg4 Nf6 {E14: Queen's Indian: Classical Variation (4 e3)} (11... f5 12. Qe2 Bf6 13. Bc4 Re8 14. Rd1 Nd7 15. Bb5 Bxe5 16. dxe5 Qe7 17. Nxd5 Bxd5 18. Qh5 g6 19. Qh6 {1-0 (36) Kramnik,V (2777)-Topalov,V (2813) Skopje 2015}) 12. Qg3 Nc6 13. Rd1 Nb4 {LiveBook: 3 Games. The position is equal.} 14. Bh6 {[%csl Gh6][%cal Rg3g7] [#]} Ne8 $1 {White must now prevent ...Bh4.} ({Don't capture} 14... Nh5 $2 15. Qg4 $18) 15. Bb5 {Strongly threatening Bxe8.} Bh4 16. Qg4 {aiming for Bxe8.} f5 17. Qh5 Nc7 18. Bf4 Nxb5 19. Nxb5 Qd5 $146 {[%csl Gb7][%cal Rd5g2] [#]} (19... Rc8 {is more complex.} 20. Nf3 Bxf3 21. Qxf3 Qd5 22. Nc7 Qxf3 23. gxf3 Kf7) 20. f3 Qxb5 (20... Bd8 {with more complications.} 21. Nc3 Qd6 22. Qh3 Nd5 23. Nxd5 Qxd5 24. Qg3 Rc8) 21. Qxh4 Nd5 $132 {[%mdl 2048] Black is not keeping still} 22. Nd3 Rac8 23. Rd2 Rc4 24. Be5 Rfc8 25. Re1 Rc2 $2 {[%mdl 8192]} (25... Qd7 $11) 26. Qg5 $2 ({White has to play} 26. Rxc2 $18 Qe8 27. Rxc8 Bxc8 28. Rc1) 26... Qd7 $11 {Hoping for ...h6.} 27. Ree2 (27. Rxc2 $11 Rxc2 28. Qg3) 27... Rxd2 28. Rxd2 h6 {Precision: White = 23%, Black = 54%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Morovic Fernandez, Ivan"]
[Black "Valenzuela Gomez, Fernando"]
[Result "1/2-1/2"]
[ECO "D92"]
[WhiteElo "2537"]
[BlackElo "2377"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,77,-2,-4,0,0,-6,0,1,1,-8,-8,0,26,29,27,9,29,0,0,0,-4,-8,-3,-10,-2,-7,-7,-13,0,0,0,-5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 g6 2. Nf3 Bg7 3. c4 Nf6 4. Nc3 d5 5. Bf4 O-O 6. Rc1 dxc4 7. e3 Be6 8. Ng5 Bd5 9. e4 h6 10. exd5 hxg5 11. Bxg5 Nxd5 12. Bxc4 Nb6 13. Bb3 Nc6 14. d5 {D92: Grünfeld: 4 Nf3 Bg7 5 Bf4} (14. Ne2 a5 15. a4 Rc8 16. O-O Nxd4 17. Nxd4 Qxd4 18. Bxe7 Rfe8 19. Bc5 Qxd1 20. Rfxd1 Bxb2 21. Rc2 Bf6 22. g3 {½-½ (30) Prohaszka,P (2607)-Ragger,M (2688) Austria 2016}) 14... Nd4 15. O-O Nxb3 16. Qxb3 Bxc3 17. Rxc3 Qxd5 18. Bxe7 Qxb3 19. Rxb3 ({Much worse is} 19. axb3 Rfe8 $15) 19... Rfe8 {[#]} 20. Bh4 $146 (20. Bg5 {with more complications.} Re5 21. h4 Rb8 22. Rd1 Rd5 23. Rc1) ({Predecessor:} 20. Bg5 Re6 21. Rd1 Rae8 {1-0 (48) Riazantsev,A (2511)-Danin,A (2314) Vladimir 2002}) 20... Re2 21. Bg3 Re7 {The position is equal.} 22. h4 c6 23. Bd6 Rd7 24. Bc5 Nd5 25. Rd1 b6 26. Be3 Re7 27. Bd2 Re4 {And now ...Rd4 would win.} 28. Rd3 Rxh4 29. Rc1 Nf4 30. Bxf4 $1 Rxf4 31. Rxc6 $11 {[%mdl 4096] Endgame KRR-KRR} Re8 {[#] Threatens to win with ...Re1+.} 32. g3 Re1+ 33. Kg2 Rf5 34. Rc2 Re7 35. Rcd2 Kg7 36. Rd7 Rxd7 37. Rxd7 Ra5 38. a3 Rb5 39. Rxa7 {Precision: White = 79%, Black = 69%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Cuartas, Jaime Alexander"]
[Black "Bachmann, Axel"]
[Result "0-1"]
[ECO "B21"]
[WhiteElo "2492"]
[BlackElo "2653"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,90,0,4,-67,-13,-80,-59,-57,-57,-68,-56,-86,-88,-88,-93,-63,-63,-46,-46,-48,-52,-106,-104,-131,-139,-290,-212,-262,-257,-273,0,-294,-258,-295,-292,-275,-271,-301,-295,-287,-273,-334,-309,-516,-513,-716,-708,-677,-610,-597,-595,-592,-586,-579,-566,-535,-441,-785,-778,-866,-872,-864,-872,-846,-864,-847,-844,-844,-840,-1160,-1093,-1051,-1050]} 1. e4 c5 2. d4 cxd4 3. c3 dxc3 4. Nxc3 Nc6 5. Nf3 e6 6. Bc4 a6 7. O-O Nge7 8. Bg5 f6 9. Be3 b5 {B21: Sicilian: 2 f4 and Morra Gambit} 10. Bb3 Na5 {LiveBook: 5 Games} (10... Ng6 11. Nd5 Rb8 12. Rc1 Be7 13. Nxe7 Ngxe7 14. Qd6 O-O 15. Rfd1 Qe8 16. Bc5 Rf7 17. h4 Ng6 18. h5 Nf8 {1-0 (31) Izzat,K (2456)-Johansen,D (2427) Melbourne 2015}) 11. Bc2 ({Better is} 11. Nd4 $11) 11... Ng6 (11... Bb7 $15) 12. h4 $146 (12. e5 $11) ({Predecessor:} 12. e5 f5 13. g4 Nc4 14. Bc1 Bb7 15. gxf5 Ngxe5 16. Nxe5 Nxe5 17. Qh5+ {0-1 (30) Stepaniuk,A (2294)-Roschupkin,V (1972) Yuzhny 2008}) 12... Be7 13. h5 Ne5 14. Nxe5 fxe5 15. Qf3 Nc4 16. Bc1 Bb7 17. a4 Bc6 18. b3 {And now axb5 would win.} Nd6 19. Qg3 b4 20. Na2 {[#]} (20. Nd1 $15) 20... O-O $1 $17 ({Reject} 20... Bxe4 $6 21. Bxe4 Nxe4 22. Qxg7 $11) ({Stronger than} 20... Nxe4 21. Qxg7 Bf6 22. Qg4 $14) 21. Bb2 Nf7 22. f4 $2 (22. Rae1 $17 {keeps fighting.}) 22... Bh4 23. Qh3 Bf6 24. Qd3 Be7 {Strongly threatening ...Bc5+.} 25. Qg3 $1 a5 26. Rad1 Bh4 27. Qh3 Qe7 28. Kh1 exf4 29. Rxf4 Bg5 30. Qg3 Nh6 31. Rxf8+ $2 (31. Rff1) 31... Rxf8 $19 {Black is clearly winning.} 32. Be5 {White hopes to continue with Bd6.} Bh4 33. Bd6 Bxg3 34. Bxe7 Rf2 35. Bb1 Ng4 36. Nc1 Ne3 37. Rg1 Rf7 38. Bc5 (38. Bd8 $142 Bf2 39. Bd3) 38... Rf4 {[%cal Rf4h4] [#]} 39. Be7 Ng4 {[%cal Rg4f2]} 40. Nd3 Bxe4 41. Rc1 Bxd3 42. Bxd3 Nf2+ 43. Kg1 Nxd3 44. Rc8+ Kf7 45. Bd6 e5 {Precision: White = 37%, Black = 72%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Hungaski, Robert Andrew"]
[Black "Sevian, Samuel"]
[Result "0-1"]
[ECO "A29"]
[WhiteElo "2492"]
[BlackElo "2601"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,106,-37,-32,-34,-39,-47,-33,-36,-43,-29,-31,-39,-59,-45,-51,-44,-38,0,-53,-36,-45,-44,-58,-27,-39,-46,-34,-8,-6,0,-25,-25,-17,-12,-22,-25,-29,-37,-48,-36,-39,-16,-6,-9,-21,-15,-36,-44,-72,-54,-93,-89,-195,-192,-458,-393,-593,-576,-647,-626,-618,-602,-575,-631,-632,-627,-600,-572,-1396,-1188,-1302,-1277,-1718,-1625,-2285,-2021,-29977,-29977,-29979,-29978,-29984,-29984,-29984,-29985]} 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. Nf3 Nc6 7. O-O Be7 8. d3 O-O 9. Be3 Re8 10. Rc1 Bf8 11. a3 Nd4 {A29: English Opening: Four Knights Variation with 4 g3} 12. Bxd4 (12. Ne4 c6 13. Bg5 f6 14. Nxd4 exd4 15. Bd2 Be6 16. Re1 Bd5 17. Qc2 Qd7 18. b4 Rad8 19. Qb2 {0-1 (73) Nepomniachtchi,I (2767)-Karjakin,S (2785) Doha 2016}) 12... exd4 13. Ne4 {LiveBook: 6 Games} a5 {Black is slightly better.} 14. Re1 c6 15. Nc5 a4 16. Qd2 g6 $146 ({Predecessor:} 16... Nd7 17. Nxd7 Qxd7 18. e3 dxe3 19. Rxe3 Rxe3 20. Qxe3 Qd8 {½-½ (20) Worek,J (2294)-Gasik,P (2105) Warsaw 2008}) 17. Rc2 Bg7 18. Kf1 Ra7 19. Qg5 Bf6 20. Qc1 Bg7 21. Qg5 Ra5 22. Qxd8 Rxd8 23. Rb1 Bf8 24. b4 axb3 25. Nxb3 Rb5 26. Rcc1 Bxa3 27. Nbxd4 (27. Nfxd4 {with more complications.} Rh5 28. Rc3 Bb4 29. Rc2 Nd5 30. Rc4) 27... Rxb1 28. Rxb1 {[#] Strongly threatening Nc2.} Nd5 29. Nc2 (29. Ra1 $5 {[%cal Ra1a3]} Be7 30. Nb3 $15) 29... Be7 30. Nd2 Nc3 31. Ra1 Bf6 32. Ra7 Bg4 33. Bf3 Bh3+ 34. Ke1 (34. Bg2 $5 {[%cal Rg2h3]} Bg4 35. Bf3 Bh3+ 36. Bg2 $15) 34... Bc8 35. Nc4 Nb5 $36 {[%mdl 2048] Black has good play.} 36. Ra4 Bh3 37. Kd2 Be6 38. Nb6 (38. Ke1 $17 {was worth a try.}) 38... Bb3 $19 39. Ra8 $2 (39. Re4 {keeps fighting.}) 39... Bxc2 40. Kxc2 (40. Bxc6 $142 Rxa8 41. Nxa8 Bxd3 42. Bd7) 40... Nd4+ 41. Kd2 Nxf3+ 42. exf3 Rxa8 43. Nxa8 {[%mdl 4096] Endgame KB-KN} Bd8 44. Kc3 Kf8 45. Kc4 b6 46. d4 {and the idea d5 leaves White hopeful.} Ke7 47. d5 c5 {[%cal Bc6c5,Bc5c4][%mdl 32]} 48. f4 Kd6 49. g4 {[#]} b5+ $1 {[%mdl 512]} 50. Kxb5 Kxd5 {Black mates.} 51. f5 gxf5 52. gxf5 c4 53. Kb4 Kd4 {Precision: White = 35%, Black = 69%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Quintiliano Pinto, Renato R"]
[Black "Echavarria, Johann"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "2483"]
[BlackElo "2309"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,70,-13,-22,0,0,0,0,0,0,0,0,0,0,36,0,11,-13,-13,-34,27,35,78,75,88,92,114,85,147,149,156,158,145,143,165,164,207,209,248,201,200,179,456,441,593,557,29985,29986,29986,29987,29988,29989,29989,929,2098,2052,1452]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Qc2 dxc4 5. e4 (5. Qxc4 Bf5 6. g3 e6 7. Bg2 Be7 8. O-O O-O 9. e3 Nbd7 10. Qe2 Qc7 11. Nc3 e5 12. dxe5 Nxe5 13. Nxe5 Qxe5 14. e4 Bg4 15. f3 Be6 {½-½ (43) Yu,Y (2743)-Wang,H (2680) Chengdu 2017}) 5... b5 6. b3 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4} cxb3 7. axb3 e6 8. Bd2 a5 9. Bd3 {LiveBook: 51 Games} Na6 10. O-O Nb4 11. Bxb4 $1 Bxb4 12. Ne5 $146 ({Predecessor:} 12. Qxc6+ Bd7 13. Qc2 O-O {½-½ (13) Del Rey,D (2371)-Adla,D (2499) Aragon 2012}) 12... Bb7 13. Nxc6 Bxc6 14. Qxc6+ Kf8 (14... Ke7 $5 {[%cal Rd8d4]} 15. e5 (15. Bxb5 Rc8 $11) 15... Nd5 $14) 15. Rc1 Rb8 16. Qc7 g6 {Strongly threatening ...Kg7.} 17. Na3 Qxc7 ({Better is} 17... Kg7 $1 $15 18. Nxb5 Nxe4) 18. Rxc7 $11 Bd6 19. Ra7 $36 {[%mdl 2048] e5 is the strong threat. Keeping Black busy.} Bxa3 20. Rxa3 Rd8 21. f3 ({Much worse is} 21. R3xa5 $6 Rxd4 22. Bxb5 Rd1+ 23. Bf1 Nxe4 $11) ({Don't play} 21. Bxb5 Nxe4 22. f3 (22. R3xa5 Rxd4 23. g3 Kg7 $11) 22... Nd2 $11) 21... a4 (21... Rxd4 $142 22. Bxb5 Rd1+ 23. Kf2 Rd2+ 24. Be2 Kg7) 22. bxa4 $16 bxa4 23. R3xa4 Kg7 24. Kf2 Rhf8 25. Ke3 Rg8 26. Bc4 Rd6 27. Rb7 Rd7 28. Raa7 Rgd8 $2 {[#]} (28... Rxb7 29. Rxb7 Re8) 29. e5 $18 Nd5+ 30. Bxd5 $1 Rxd5 31. Rxf7+ {KRR-KRR} Kg8 32. Rg7+ Kh8 33. Rxh7+ Kg8 34. Rag7+ (34. Kf4 $142 R8d7 35. Rhxd7 Rxd7 36. Rxd7 Kf8 37. d5 exd5 38. Kg5 d4 39. e6) 34... Kf8 35. Rxg6 R5d7 {Precision: White = 56%, Black = 43%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Tang, Andrew"]
[Black "Shabalov, Alexander"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "2461"]
[BlackElo "2556"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,107,60,49,45,49,28,26,24,92,93,103,107,112,90,135,124,141,130,138,119,180,173,154,168,216,244,225,214,218,194,188,187,196,182,195,191,185,164,245,258,272,276,277,277,267,267,269,252,254,244,324,279,291,289,381,381,381,369,378,373,379,427,404,389,456,425,438,429,438,407,413,399,352,377,410,419,397,386,495,389,372,318,379,379,379,377,380,365,888,936,877,834,1286,1181,5077,2701,12778,11790]} 1. d4 d5 2. Bf4 Nf6 3. e3 c5 4. dxc5 (4. c3 e6 5. Nf3 Nc6 6. Nbd2 cxd4 7. exd4 Nh5 8. Bg5 f6 9. Be3 Bd6 10. Bb5 O-O 11. O-O a6 12. Ba4 Bd7 13. Ne1 Nf4 14. g3 Nh3+ {1-0 (52) Karjakin,S (2781)-Nakamura,H (2785) Stavanger 2017}) 4... Nc6 5. Bb5 g6 6. Nf3 {D00: 1 d4 d5: Unusual lines} Bg7 {LiveBook: 3 Games} 7. Nc3 O-O $146 ({Predecessor:} 7... Bg4 8. O-O O-O 9. h3 Bxf3 10. Qxf3 e6 11. Rfd1 Nd7 {1-0 (70) Sielecki,C (2437)-Kanicki,K (2097) Wroclaw 2015}) 8. Bxc6 {White is slightly better.} bxc6 9. Be5 Ba6 (9... Bg4 $11 {keeps the balance.}) 10. Qd4 $16 Qc8 11. O-O-O Rd8 12. h3 Rd7 13. g4 Rb7 14. Qa4 Bb5 15. Qa3 Bf8 (15... a5 $16 16. Kb1 (16. Nxb5 Rxb5 17. Nd4 Rb7 $11) 16... h6) 16. Bxf6 $1 $18 exf6 17. Nd4 $1 Rab8 18. Ndxb5 Rxb5 19. Nxb5 Rxb5 20. c3 Bxc5 {[#]} 21. Qa4 $1 Bb6 22. Rd2 Ra5 23. Qb3 Qe6 24. Rhd1 Qe4 (24... f5 $142 25. gxf5 Qxf5) 25. Qc2 Qxc2+ 26. Rxc2 Rxa2 {[%mdl 4096] Endgame KRR-KRB} 27. c4 Ra1+ 28. Kd2 Ra4 29. cxd5 cxd5 30. Kc3 h5 31. Kb3 ({Not} 31. Rxd5 hxg4 32. b3 Re4 $16) 31... Ra5 32. gxh5 g5 33. Rcd2 Rb5+ 34. Ka2 Ra5+ {[#]} 35. Kb1 $1 d4 36. exd4 {[%cal Be3d4,Bd4d5][%mdl 32]} Rd5 37. Kc2 Kg7 38. Kb3 Kh6 39. Kc4 Rd6 40. d5 Kxh5 41. Re2 f5 42. Re8 f4 43. Rh8+ Kg6 44. f3 {[%cal Bf2f3,Bf3g4][%mdl 32]} f5 45. Rd2 Kg7 46. Rc8 g4 47. hxg4 fxg4 48. fxg4 f3 49. Rc6 Rd8 $2 (49... Rd7 50. Rd1 f2) 50. Rxb6 {White is clearly winning.} axb6 51. Rf2 Rf8 52. Kd4 Rf4+ 53. Ke5 Rb4 54. Rxf3 {Precision: White = 86%, Black = 35%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Mosquera, Miguel"]
[Black "Ortiz Suarez, Isan Reynaldo"]
[Result "0-1"]
[ECO "D01"]
[WhiteElo "2391"]
[BlackElo "2570"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,78,-4,0,-6,31,24,47,47,46,2,81,89,82,77,130,128,128,122,124,122,135,83,97,68,58,37,35,33,64,58,72,35,41,27,38,19,53,0,0,0,0,-1,13,27,60,37,43,5,52,56,49,58,121,-8,-54,-56,0,-15,-26,-25,-19,-161,-112,-235,-217,-453,-530,-512,-473]} 1. d4 Nf6 2. Nc3 d5 {[%cal Bd7d5,Bd5e4][%mdl 32]} 3. Bg5 c5 4. Bxf6 gxf6 5. e4 dxe4 6. dxc5 Qa5 7. Qd5 {D01: Veresov Opening} (7. Bb5+ Bd7 8. a4 a6 9. Ra3 Nc6 10. Nge2 e6 11. b4 Qxb4 12. Rb3 Qa5 13. O-O axb5 14. Nxe4 Be7 15. axb5 {0-1 (33) Gareev,T (2604)-Robson,R (2656) Saint Louis 2015}) 7... Nc6 (7... e6 $5 {[%cal Re6d5]} 8. Qxe4 Nc6 $14) 8. Bb5 Bd7 9. O-O-O {[%csl Gd1][%cal Rd5d7] [#] White is slightly better.} Rd8 $1 10. Qxe4 {Black should prevent Nge2.} ({Much weaker is} 10. Bc4 Be6 $15) 10... f5 (10... a6 $1 $11 {remains equal.} 11. Ba4 Qxc5) 11. Qe3 $16 {Nd5 is the strong threat.} Bg7 $146 ({Predecessor:} 11... e6 12. Nf3 Bg7 13. Bxc6 Bxc6 14. Ne5 O-O {1-0 (28) Johnsen,K-Rasmussen,P corr 1999}) 12. Nge2 a6 (12... O-O $142) 13. Bxc6 Bxc6 14. Rxd8+ Qxd8 15. Rd1 Qc7 16. g3 (16. Nd4 $142) 16... O-O 17. Nf4 {Threatens to win with Ncd5.} Bh6 $1 {White must now prevent ...e5.} 18. Re1 e6 19. Kb1 Rc8 20. a3 Qb8 21. Qd4 {aiming for Nh5.} Rd8 22. Qf6 Bg7 23. Qh4 Rd4 24. Rd1 (24. Nce2 $14 Rd7 25. Nh5) 24... Qe5 $11 25. Rxd4 Qxd4 26. Qe7 h6 (26... Bf6 $5 {[%cal Rf6e7]} 27. Qc7 Qxc5 $11) 27. Nd3 $1 Bf6 28. Qc7 Bf3 29. Qd6 (29. Na2 {keeps more tension.} Be4 30. Nac1 Qd5 31. Qb6 Kg7 32. Qb4) 29... Kg7 30. Qxd4 Bxd4 $14 {[%mdl 4096] Endgame KBB-KNN} 31. Kc1 e5 {[#]} ({Better is} 31... Bxc3 $1 $14 32. bxc3 f6) 32. Kd2 (32. Nd1 $1 $16) 32... e4 $11 33. Ne1 Bg4 ({Of course not} 33... Bxc5 $6 34. Nxf3 exf3 35. Nd1 $14) ({Black should play} 33... Bxf2 $15 34. Nxf3 exf3) 34. b4 Bxf2 {Hoping for ...e3+.} 35. Ng2 Bg1 36. Ne3 (36. Ke1 $1 $11) 36... Bxh2 $19 37. Nxg4 (37. Ne2 $17) 37... fxg4 38. Nxe4 $2 (38. Ne2 {only move.}) 38... f5 39. Nd6 Kf6 {Precision: White = 35%, Black = 63%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Quinonez Garcia, Santiago"]
[Black "Flores, Diego"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "2379"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,83,0,7,-129,-119,-154,-151,-163,-145,-158,-166,-161,-155,-183,-195,-186,-210,-201,-204,-175,-180,-193,-197,-179,-191,-218,-187,-212,-201,-182,-162,-214,-209,-200,-200,-229,-238,-315,-320,-425,-408,-419,-404,-431,-434,-427,-413,-419,-431,-493,-438,-434,-430,-1414,-1446,-1459,-1408,-1393,-1390,-1291,-1272,-1169,-868,-837,-791,-29937,-12849,-12841,-6937,-7143,-6431,-6103]} 1. d4 Nf6 2. Bf4 d6 3. e3 g6 4. h3 Bg7 5. Nf3 O-O 6. Be2 c5 7. c3 Qb6 {LiveBook: 114 Games} 8. Na3 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} (8. Qb3 $11 {remains equal.}) (8. Qb3 Be6 9. Qxb6 axb6 10. a3 Bd5 11. O-O Bc6 12. Nbd2 Nbd7 13. Rfe1 Rfd8 14. Bh2 b5 15. Bf1 e5 16. e4 exd4 17. cxd4 d5 18. e5 {0-1 (54) Morozevich,A (2722)-Grischuk,A (2777) Loo 2014}) 8... Qxb2 $146 ({Predecessor:} 8... cxd4 9. Nc4 Qd8 10. exd4 b6 11. O-O Bb7 12. Qd2 Nbd7 13. Bh6 Rc8 14. Bxg7 Kxg7 15. Ne3 e6 {½-½ (67) Frick,C (2243)-Werner,C (2334) Radebeul 2016}) 9. Nc4 Qxc3+ 10. Nfd2 {Black is clearly better.} Bd7 11. O-O cxd4 12. a3 {[#]} dxe3 $1 13. Rc1 exf2+ 14. Rxf2 Qd4 {Threatens to win with ...Nd5.} 15. Be3 Qd5 16. Bf3 Qe6 {And now ...d5 would win.} 17. Bxb7 Nc6 {Strongly threatening ...d5.} 18. Bxa8 Rxa8 19. Re2 Qd5 20. Nf3 Qxd1+ 21. Rxd1 Rb8 22. Nd4 (22. Bf2 {might work better.}) 22... Nd5 $19 {...Nc3 is the strong threat.} 23. Nxc6 Bxc6 24. Bxa7 Ra8 25. Nb6 Nc3 (25... Rxa7 26. Nxd5 Be5 27. Rc2 $17) 26. Rxe7 Rxa7 $1 ({Not} 26... Nxd1 27. Nxa8 Bf8 28. Re1 $11) 27. Rxa7 Nxd1 28. Rc7 {Hoping for Rc8+.} Bd4+ 29. Kh2 Be4 (29... Bxb6 $2 30. Rxc6 Bc5 31. Rc8+ Kg7 32. a4 $17) 30. Nc4 d5 {[%cal Bd6d5,Bd5e4,Be4e3][%mdl 32]} 31. Rc8+ Kg7 32. Nd2 Ne3 33. Nxe4 {[%mdl 4096] Endgame KRN-KBN} (33. g3 $142) 33... Nf1+ 34. Kh1 dxe4 35. g4 e3 36. Kg2 e2 37. Rc1 {[#]} Bc3 $1 {[%mdl 512]} 38. Kf2 {[#]} (38. Rxc3 e1=Q) 38... Ng3 $1 {[%mdl 512]} 39. Rxc3 (39. Kxg3 e1=Q+) 39... Ne4+ 40. Kxe2 {Black is clearly winning.} Nxc3+ 41. Kd3 Na4 42. Kd4 {Precision: White = 51%, Black = 94%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Aranha Filho, Alvaro Z"]
[Black "Garcia Pantoja, Roberto"]
[Result "0-1"]
[ECO "D58"]
[WhiteElo "2355"]
[BlackElo "2500"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,118,0,0,-1,2,2,1,-3,0,-7,9,10,4,9,14,6,8,9,13,15,14,0,0,2,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,-10,-8,0,-15,-11,-11,-18,-37,-32,-33,-50,-43,-8,-8,-8,-8,-8,-8,-15,-8,-8,-8,-8,0,-3,-8,-8,-77,-54,-1676,-1498,-2475,-2310,-29969,-29971,-29982,-29983,-29983,-29984,-29984,-29982]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. e3 h6 7. Bh4 b6 8. Bd3 dxc4 9. Bxc4 Bb7 10. O-O Nbd7 11. Qe2 Ne4 12. Bxe7 Qxe7 13. Nxe4 Bxe4 14. Bd3 {D58: Queen's Gambit Declined: Tartakower Defence} Bxd3 (14... Bxf3 $5 15. Qxf3 c5 $11) 15. Qxd3 c5 {[#]} 16. Qa3 $146 {The position is equal.} ({Predecessor:} 16. Rfd1 Rfd8 17. h3 cxd4 18. Nxd4 Rac8 19. Qe2 Ne5 20. Nf3 Nxf3+ 21. Qxf3 Rxd1+ 22. Rxd1 {½-½ (29) Zhao,J (2560)-Wen,Y (2532) Beijing 2009}) 16... Rfd8 17. Rfd1 Kf8 18. Rac1 cxd4 {Hoping for ...Qxa3.} 19. Qxe7+ Kxe7 20. Nxd4 Rdc8 21. Kf1 g6 22. Ke2 a5 23. Nb5 (23. f4 {with more complications.} Nc5 24. g4 f6 25. h4 e5 26. fxe5 fxe5 27. Nb5) 23... Rxc1 24. Rxc1 $11 {[%mdl 4096] Endgame KRN-KRN} Nc5 25. Rc2 g5 26. f3 f5 27. Rd2 Rc8 28. Na7 Rc7 29. Nb5 Rc8 30. Na7 Rc7 31. Nb5 Rd7 32. Nd4 Rd6 33. Nb5 Rd7 34. Nd4 Kf6 35. Nb5 Rxd2+ 36. Kxd2 {KN-KN} Ke5 37. Na3 Kd5 38. b3 Nd7 39. Kd3 Ne5+ 40. Ke2 Nc6 41. Nc2 e5 42. g3 b5 43. h4 gxh4 44. gxh4 h5 45. Kd3 e4+ 46. Ke2 Kc5 {With the idea ...Nb4.} 47. f4 Nb4 48. Kd2 Nxa2 {...Nb4 is the strong threat.} 49. Nd4 Nb4 50. Nxf5 Nd5 {Threatens to win with ...Kb4.} 51. Ng3 Kb4 52. Nxe4 Kxb3 {[#] Strongly threatening ...a4.} 53. Nc5+ (53. f5 $11) 53... Kc4 $17 54. Nd3 $2 {[%mdl 8192]} (54. Ne4 $15) 54... a4 $19 {[%cal Ba5a4,Ba4a3,Ba3a2][%mdl 32]} 55. e4 a3 56. Ne5+ Kb3 {Black mates.} 57. Nd3 {[#]} Nxf4 $1 {[%mdl 512]} 58. Nc1+ (58. Nxf4 a2) 58... Kb2 59. e5 a2 {Precision: White = 63%, Black = 90%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.13"]
[Round "5"]
[White "Baules, Jorge"]
[Black "Vera Siguenas, Deivy"]
[Result "*"]
[ECO "E62"]
[WhiteElo "2355"]
[BlackElo "2526"]
[Annotator "TA"]
[PlyCount "31"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,22,36,41,49,41,57,59,75,59,77]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 d6 6. Nf3 {[%cal Bg1f3,Bf3e1,Be1d3][%mdl 32]} Nc6 7. O-O Bf5 8. Ne1 e5 {E62: King's Indian: Fianchetto: 6...c6 and Panno Variation (6...Nc6) without ...a6} (8... Bd7 9. h3 e5 10. d5 Ne7 11. Nd3 b6 12. e4 Ne8 13. b4 a5 14. bxa5 Rxa5 15. a4 f5 16. Bd2 {1-0 (47) Wang,H (2717)-Fressinet,L (2700) Huaian 2016}) 9. d5 Ne7 10. e4 Bd7 11. Nd3 Ne8 {Predecessor:} 12. Bd2 $146 b6 13. Qe2 a5 14. f4 exf4 15. gxf4 Qc8 16. e5 {1-0 (50) Bocharov,D (2585)-Wang,R (2478) ICC INT 2005} *

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Bachmann, Axel"]
[Black "Cruz, Cristhian"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2653"]
[BlackElo "2558"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,59,29,17,24,9,0,37,33,46,25,102,104,106,106,112,96,84,102,97,104,116,124,158,144,268,280,385,318,316,312,526,519,513,506,1148,1064,1153,677]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 c5 5. Bxb4 cxb4 6. g3 O-O 7. Bg2 d6 8. O-O Nc6 9. a3 bxa3 10. Rxa3 e5 11. Nc3 Bg4 12. d5 Nb4 13. Ne1 {E11: Bogo-Indian} a5 14. Qd2 Nd7 $146 ({Predecessor:} 14... Bf5 15. e4 Bg6 16. f4 exf4 17. gxf4 Qb6+ 18. Kh1 Rfe8 19. f5 Bh5 20. Na4 Qd8 {0-1 (36) Pacher,M (2499)-Haring,V (2125) Tatranske Zruby 2016}) 15. Nd3 {White is slightly better.} Nxd3 16. exd3 b6 (16... Nc5 $11) 17. Nb5 $16 Nc5 18. d4 exd4 19. Qxd4 Bc8 20. b4 Nb7 21. Qf4 $36 {[%mdl 2048] White is in control.} Re8 22. h4 Re5 23. Nd4 {aiming for Nc6.} Qf8 {[#]} (23... Re8 $16 {was called for.} 24. Rf3 f6) 24. Nc6 $1 $18 Bd7 25. Nxe5 dxe5 26. Qe3 ({Don't play} 26. Qxe5 $6 Qxb4 27. Raa1 Qc5 $18) 26... Nd6 $2 (26... Rc8 27. Qxb6 Qxb4 28. Qxb4 axb4) 27. Rc1 {White is clearly winning.} Rc8 28. bxa5 {[%cal Bb4a5,Ba5a6][%mdl 32]} Nxc4 {[#]} (28... Nf5 $142) 29. Rxc4 $1 {[%mdl 512]} Rxc4 30. a6 {Precision: White = 87%, Black = 29%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Cori, Jorge"]
[Black "Delgado Ramirez, Neuris"]
[Result "1-0"]
[ECO "E16"]
[WhiteElo "2618"]
[BlackElo "2613"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,57,41,27,26,25,41,18,39,28,45,40,64,56,60,31,79,80,86,81,81,68,73,55,71,45,53,42,75,66,82,92,89,91,117,118,97,84,108,85,433,429,700,702,654,490,675,666]} 1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. g3 Bb4+ 5. Bd2 c5 6. Bg2 Bb7 7. O-O Bxd2 {E16: Queen's Indian: 4 g3 Bb7 5 Bg2 Bb4+} (7... O-O 8. Qb3 a5 9. Rd1 d5 10. dxc5 Bxc5 11. cxd5 Qxd5 12. Qxd5 Nxd5 13. Nc3 Nd7 14. Nxd5 Bxd5 15. Ne1 Bxg2 16. Kxg2 {½-½ (28) Ni,H (2675)-Bu,X (2713) China 2017}) 8. Qxd2 cxd4 9. Rd1 O-O {The position is equal.} 10. Qxd4 Nc6 11. Qd6 Qb8 12. Nc3 {[%cal Bb1c3,Bc3b5,Bb5d6][%mdl 32]} Rd8 13. Nb5 $146 ({Predecessor:} 13. b3 Qxd6 14. Rxd6 Kf8 15. Rad1 {½-½ (77) Koksal,E (2339)-Drazic,S (2439) Skopje 2015}) 13... a6 14. Qxb8 Raxb8 15. Nd6 Ba8 16. Ng5 Rf8 $1 17. Rd2 h6 18. Nge4 (18. Nf3 {looks sharper.} b5 19. c5 g5 20. Rc1 Kg7 21. e4) 18... Nxe4 19. Bxe4 Rfd8 20. Rad1 Kf8 21. f4 $36 {[%mdl 2048] White is on the roll.} Ke7 22. Kf2 g5 23. Bf3 f5 24. Bh5 {Hoping for Nf7.} Rf8 25. h4 Nd8 $2 {[%mdl 8192] [#]} (25... Rbd8 $16) 26. Nxf5+ $1 $18 {[%mdl 512] White is clearly winning.} exf5 (26... Rxf5 $142 27. Rxd7+ Kf6 28. Rxd8 Rxd8 29. Rxd8 Be4) 27. Rxd7+ Kf6 28. R1d6+ Ne6 29. Rh7 {Precision: White = 57%, Black = 41%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Sevian, Samuel"]
[Black "Bruzon Batista, Lazaro"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "2601"]
[BlackElo "2650"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,52,25,44,15,11,14,37,41,40,12,8,0,0,-15,-20,-37,-37,-39,-37,-41,-50,-53,-53,-53,-55,-50,-36,-47,-36,-31,-31,-54,-25,-52,-23,-91,-22,-20,-11]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 {[%cal Bd2d3,Bd3d4,Bd4d5][%mdl 32]} d6 5. c3 Be7 6. O-O O-O 7. Re1 a6 8. Ba4 Re8 9. d4 {C84: Closed Ruy Lopez: Unusual White 6th moves} (9. Nbd2 Bf8 10. h3 Bd7 11. Nf1 Ne7 12. Bc2 c5 13. Ng3 Ng6 14. d4 cxd4 15. cxd4 exd4 16. Qxd4 Rc8 {½-½ (49) Topalov,V (2761)-Carlsen,M (2855) Paris 2016}) 9... b5 10. Bc2 Bb7 11. Nbd2 {White is slightly better.} Bf8 12. d5 Nb8 {[%cal Bc6b8,Bb8d7,Bd7c5][%mdl 32]} 13. h3 c6 14. c4 Qc7 15. dxc6 $146 ({Predecessor:} 15. b3 Nbd7 16. Nf1 Rec8 17. Ne3 g6 18. Bd2 a5 19. Rc1 bxc4 20. bxc4 cxd5 21. Nxd5 Qd8 22. Ba4 Nc5 23. Bg5 Be7 24. Bxf6 Bxf6 25. Bb5 Bxd5 26. Qxd5 Rab8 27. Rb1 Bg7 28. Qd2 {½-½ (28) Silva Filho,A (2032)-Nichols,S (2253) LSS email 2013}) 15... Bxc6 16. b3 Nbd7 17. Bb2 Qb7 18. Rc1 Nc5 {[%cal Rc5e4]} 19. Qe2 b4 20. Nh2 a5 21. a4 h5 22. Nhf1 g6 23. f3 Bh6 24. Qf2 Ne6 25. Ne3 (25. Rcd1 $11) 25... Rac8 (25... Qa7 $17) 26. Rcd1 Red8 {Precision: White = 49%, Black = 60%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Fier, Alexandr"]
[Black "Kovalyov, Anton"]
[Result "1/2-1/2"]
[ECO "E39"]
[WhiteElo "2576"]
[BlackElo "2643"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,61,-5,-1,45,6,69,74,64,60,65,58,79,87,91,93,87,92,126,93,86,90,85,87,85,81,110,120,147,154,147,150,146,100,92,95,114,95,70,81,124,91,108,100,138,141,143,104,97,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 c5 6. dxc5 Qc7 {E39: Nimzo-Indian: Classical: 4...c5 5 dxc5 0-0} (6... Na6 7. g3 Nxc5 8. Bg2 b6 9. O-O Bb7 10. Nb5 Be4 11. Qd1 Nb7 12. Bf4 a6 13. Nd6 Bxd6 14. Bxd6 Nxd6 15. Qxd6 Qb8 16. Rfd1 Qb7 {½-½ (71) Akobian,V (2661)-Bruzon Batista,L (2652) Saint Louis 2017}) 7. Bg5 (7. a3 $5 {[%cal Ra3b4]} Bxc3+ 8. Qxc3 $14) 7... Bxc5 $146 (7... Bxc3+ $1 $11 8. Qxc3 Ne4) ({Predecessor:} 7... Bxc3+ 8. Qxc3 Ne4 9. Qd4 Nxg5 10. Nxg5 Qa5+ 11. Qd2 Qxd2+ 12. Kxd2 Na6 13. Ne4 f5 14. Nc3 Nxc5 {0-1 (32) Endean,A (1784)-Jonsson,G (1505) IECC email 2003}) 8. Bxf6 $14 gxf6 {White is better.} 9. e3 Nc6 10. Qe4 Ne5 11. Qh4 Be7 12. Nxe5 Qxe5 13. Bd3 {[%csl Gd3][%cal Rh4h7] [#]} h5 14. Be2 $36 {[%mdl 2048] White is really pushing.} Kg7 15. Qxh5 f5 16. Qf3 Rh8 17. O-O-O Bf6 18. g4 fxg4 19. Rhg1 Rh4 20. h3 {[%cal Bh2h3,Bh3g4,Bg4g5][%mdl 32]} Rb8 21. hxg4 b6 22. g5 Be7 23. Bd3 {Black must now prevent Be4.} Bb7 24. Qe2 $1 Bb4 25. Nb5 {Threatens to win with f4.} Bc5 26. Bc2 ({Of course not} 26. Nxa7 Ra8 $11) 26... d5 27. cxd5 Bxd5 28. Nc3 Ba3 {[#]} 29. bxa3 ({White should play} 29. Rd3 $1 $16 Be4 30. g6 (30. bxa3 Bxd3 31. Qxd3 Rc8 $11) 30... Bxd3 31. Qxd3) 29... Qxc3 $11 30. Qd3 Qxd3 31. Bxd3 {Precision: White = 70%, Black = 66%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Ortiz Suarez, Isan Reynaldo"]
[Black "Tang, Andrew"]
[Result "1/2-1/2"]
[ECO "C77"]
[WhiteElo "2570"]
[BlackElo "2461"]
[Annotator "TA"]
[PlyCount "150"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,150,20,0,6,2,15,0,8,0,27,15,17,5,33,28,52,35,54,33,62,43,43,41,48,26,47,47,61,45,63,58,85,91,91,83,84,15,20,14,21,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-14,-14,-11,-14,-17,-17,-17,-11,-48,0,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,6,6,6,6,6,6,6,8,6,6,6,6,6,6,6,6,6,6,6,6,6,6]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 {[%cal Bf1b5,Bb5a4,Ba4b3,Bb3a2][%mdl 32]} a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. a3 O-O 9. Nc3 Na5 {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines} (9... Nb8 10. Ne2 Nbd7 11. c3 Bb7 12. Ng3 c5 13. Re1 Rc8 14. Nf5 c4 15. dxc4 Bxe4 16. Nxe7+ Qxe7 17. cxb5 axb5 {1-0 (42) Kramnik,V (2811)-Harikrishna,P (2755) Shamkir 2017}) 10. Ba2 Be6 11. Bg5 {LiveBook: 7 Games} h6 12. Bxf6 $146 ({Predecessor:} 12. Bd2 c5 13. b4 Bxa2 14. Rxa2 Nc6 15. Nd5 Nxd5 16. exd5 Nd4 17. c4 {½-½ (35) Smirnov,T (2297)-Guliev,G (2053) St Petersburg 2015}) 12... Bxf6 13. b4 Nc6 14. Nd5 g6 15. c3 Bg7 16. a4 Kh7 17. Ne3 Qd7 18. Qc2 Rfb8 19. Bd5 Rc8 20. Ra3 Rab8 21. axb5 axb5 22. Qa2 Ne7 23. Bxe6 fxe6 24. Ra1 Rf8 25. Qe2 c5 26. Ra7 Rb7 27. Rxb7 Qxb7 28. Qa2 (28. bxc5 $16 dxc5 29. Qa2) 28... cxb4 $11 29. cxb4 Qd7 30. Qa6 Rc8 31. h4 Rc6 32. Qa2 Rc7 33. Qa6 Rc6 34. Qa8 {Threatening Ra7.} Rc7 35. Qa3 Nc6 36. Nc2 d5 (36... Ra7 $5 {[%cal Ra7a3]} 37. Qc3 Rc7 $11) 37. Qa6 dxe4 38. dxe4 Nd4 39. Ncxd4 exd4 40. e5 d3 {[#] Threatens to win with ...d2.} 41. Rd1 Qd5 42. Qd6 Rd7 43. Qxd5 Rxd5 {[%mdl 4096] Endgame KRB-KRN} 44. Ne1 d2 45. Nf3 {The position is equal.} Bxe5 46. Nxe5 Rxe5 47. Rxd2 {KR-KR} Re4 48. Rd7+ Kg8 49. g3 Kf8 50. Kg2 Rxb4 51. Rb7 Rb3 52. h5 gxh5 53. Rh7 Rc3 (53... h4 {looks sharper.} 54. gxh4 h5 55. Rxh5 Kg7 56. Rg5+ Kf6) 54. Rxh6 Rc6 (54... Ke7 {feels hotter.} 55. Rxh5 Rb3 56. g4 b4 57. Rb5 Rb1) 55. Rxh5 Rb6 56. Rh1 b4 {[%cal Bb5b4,Bb4b3][%mdl 32]} 57. Rb1 Ke7 58. Kf3 Kd6 59. Ke4 b3 60. Kd4 Rb5 61. Rb2 Rf5 62. f4 Rd5+ 63. Kc4 e5 64. Rxb3 {[#] White wants to mate with Rb6+.} Rc5+ 65. Kd3 {With the idea f5.} exf4 66. gxf4 Ke6 67. Ke4 Rc4+ 68. Kf3 Rc1 69. Rb5 Kf6 70. Rb8 Rf1+ 71. Kg3 Rg1+ 72. Kf2 $1 {[%cal Rf2g1]} Ra1 73. Rf8+ Kg7 74. Rf5 Kg6 75. Re5 Kf6 {Precision: White = 61%, Black = 66%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Flores, Diego"]
[Black "Quintiliano Pinto, Renato R"]
[Result "1/2-1/2"]
[ECO "D43"]
[WhiteElo "2567"]
[BlackElo "2483"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,82,-10,39,35,37,34,55,49,56,70,75,59,60,58,94,18,18,18,18,19,22,23,19,11,22,19,9,0,19,12,19,20,27,25,22,22,21,20,15,21,21,8,24,47,90,81,56,83,68,11,26,0,0,0,0,0,0,0,0,-6,0]} 1. Nf3 d5 2. c4 e6 3. d4 Nf6 4. Nc3 c6 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 g6 8. Bd3 Bg7 9. O-O dxc4 10. Bxc4 Nd7 11. Rc1 O-O 12. Bb3 Rd8 {LiveBook: 3 Games. D43: Semi-Slav: 5 Bg5 h6} (12... Qe7 13. Na4 Rd8 14. Qc2 Nf8 15. Ne5 Bd7 16. Qc5 Qxc5 17. Nxc5 Rab8 18. f4 Be8 19. Rc2 Nh7 20. Rfc1 {½-½ (46) Topalov,V (2796)-Aronian,L (2750) Nice 2009}) 13. Qc2 Qe7 14. Ne2 Kh7 {White is slightly better.} 15. h4 $146 {[%cal Bh2h4,Bh4h5][%mdl 32]} ({Predecessor:} 15. Rfd1 e5 16. dxe5 Nxe5 17. Nxe5 Rxd1+ 18. Rxd1 Bxe5 19. Qd2 Bc7 20. Nd4 {½-½ (30) Verdier,P (2350)-Sanner,Z ICCF email 2001}) 15... e5 16. Ng3 Re8 17. h5 e4 18. Nd2 {[%cal Rc2e4]} Nf6 19. Qc5 (19. Qb1 $16) 19... Be6 $11 20. Qxe7 Rxe7 21. hxg6+ fxg6 22. Bxe6 Rxe6 23. Nb3 Re7 24. a3 h5 25. Rc5 Rf8 26. Nd2 Bh6 27. Re5 Rxe5 28. dxe5 Ng4 29. Nc4 b5 30. Na5 Nxf2 31. Rxf2 Bxe3 32. Nxe4 Rf4 33. Ng5+ Kh6 {[#]} 34. Nh3 $1 {[%cal Rh3f4]} Re4 35. Nxc6 Rc4 36. Nd8 ({White should try} 36. Nb4 $14) 36... g5 37. Nf7+ Kg6 {The position is equal.} 38. Nd6 Rc5 39. e6 {[#] Black must now prevent e7!} Re5 40. Nxg5 Bxg5 41. Kf1 Be7 {Precision: White = 64%, Black = 58%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Shabalov, Alexander"]
[Black "Valdes Romero, Leonardo"]
[Result "1-0"]
[ECO "B07"]
[WhiteElo "2556"]
[BlackElo "2407"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,111,16,-14,31,17,28,12,0,0,50,31,137,76,126,118,101,132,162,102,128,99,147,146,202,233,220,181,165,163,141,179,220,243,219,209,208,152,251,238,223,195,175,173,258,245,262,256,269,217,194,195,197,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,71,51,190,170,192,71,71,71,68,60,56,56,56,16,138,135,217,214,212,201,188,187,230,230,29974,29975,29977,29978]} 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nge2 Be7 5. g3 c6 6. Bg2 {B07: Pirc Defence: Miscellaneous Systems} O-O 7. a4 (7. O-O b5 8. a3 Nbd7 9. h3 a5 10. g4 Ba6 11. Ng3 exd4 12. Qxd4 b4 13. Nce2 d5 14. e5 Bxe2 15. Nxe2 Bc5 16. Qf4 Nxe5 17. Qxe5 {0-1 (43) Moiseenko,A (2707)-Caruana,F (2791) Dubai 2014}) 7... a5 8. O-O Na6 9. h3 Nb4 10. Be3 {LiveBook: 10 Games} Be6 11. f4 Bc4 12. Rf2 (12. b3 $5 {[%cal Rb3c4]} Ba6 13. Qd2 $14 (13. fxe5 dxe5 14. Rf5 exd4 $11)) 12... Re8 13. g4 {[%cal Bg3g4,Bg4g5][%mdl 32]} h6 $146 ({Predecessor:} 13... exd4 14. Nxd4 {0-1 (47) Sek,K (2463)-Khegay,D (2349) Ekaterinburg 2013}) 14. Ng3 Bf8 (14... exd4 $14 15. Bxd4 c5 16. Bxf6 Bxf6) 15. b3 $36 {[%mdl 2048] Keeping Black busy.} (15. g5 $142) 15... Ba6 16. g5 $1 {[%cal Rg5f6]} hxg5 17. fxg5 Nh7 18. h4 (18. g6 fxg6 19. dxe5 (19. Qf3 Qf6 $15) 19... Rxe5 $11) ({White should try} 18. d5 $18) 18... exd4 $16 19. Bxd4 {And now Rxf7 would win.} ({But not} 19. Qxd4 g6 $14) 19... c5 20. Be3 d5 (20... g6 $16 {was worth a try.}) 21. Qf3 $1 $18 {[%cal Rf3f7]} Qe7 {White must now prevent ...d4.} 22. Nf5 Qe5 23. Bf4 dxe4 24. Qh3 e3 25. Bxe5 exf2+ 26. Kxf2 Rxe5 27. Be4 Rae8 (27... g6 $16) 28. Qf3 $1 g6 29. Ng3 Bg7 30. Rd1 R5e7 (30... Nf8 {might work better.} 31. Nb5 Bxb5 32. axb5 R5e7) 31. Nd5 Nxd5 32. Bxd5 Bd4+ 33. Kg2 Be2 34. Nxe2 Rxe2+ 35. Kh1 (35. Kf1 $1 $18 {and the rest is easy.} Rf2+ 36. Qxf2 Bxf2 37. Kxf2) 35... Rf2 $16 36. Bxf7+ $1 Kf8 {[#]} 37. Qxf2 $1 ({Much weaker is} 37. Qxb7 Ree2 $11) 37... Bxf2 38. Bxe8 Kxe8 39. Kg2 Bd4 40. Kf3 {[%mdl 1024] White has strong compensation.} Nf8 41. Ke4 Ne6 42. Kd5 Kd7 43. Rf1 Nd8 {[#]} ({Better is} 43... Nc7+ $14 44. Kc4 Ne8) 44. Rf3 $1 $18 b6 45. Kc4 (45. c3 $18 Bh8 46. Kc4) 45... Kc6 $16 46. Rf8 Ne6 47. Rc8+ Kd7 48. Rg8 Bf2 $1 49. Kb5 Bxh4 (49... c4 $1 $11) 50. Kxb6 Be1 (50... Bxg5 $16 51. Kxa5 (51. Rxg6 Bd8+ 52. Kb5 Nd4+ 53. Kxc5 Nxc2 $11) 51... Be3) 51. Rxg6 $18 Bd2 52. Rg8 Nxg5 53. Kxc5 Ne6+ 54. Kb6 Nd4 $2 (54... Nf4 $18 55. c4 Bb4 56. Rg7+ Kc8) 55. Rg3 Be1 56. Rd3 {Precision: White = 68%, Black = 45%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Vasquez Schroeder, Rodrigo"]
[Black "Fernandez Reyes, Lisandro"]
[Result "1-0"]
[ECO "B04"]
[WhiteElo "2553"]
[BlackElo "2402"]
[Annotator "TA"]
[PlyCount "125"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,125,85,57,62,54,50,45,61,64,72,57,96,84,94,52,46,49,58,58,60,60,73,29,106,97,142,127,153,139,122,113,146,137,208,200,184,63,58,49,73,63,84,83,79,74,206,222,206,195,203,98,101,85,89,104,210,197,270,277,269,265,260,201,195,200,188,188,159,156,228,204,383,365,386,385,397,394,392,386,398,387,521,516,502,509,498,486,485,473,622,619,1094,600,930,885,796,370,392,339,804,460,614,608,910,851,1055,1004]} 1. e4 Nf6 {[%cal Bg8f6,Bf6d5,Bd5b6][%mdl 32]} 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. Qe2 d5 {B04: Alekhine's Defence: 4 Nf3} (7... O-O 8. h3 Nc6 9. O-O dxe5 10. dxe5 Nd4 11. Nxd4 Qxd4 12. Re1 Be6 13. Nd2 Bxb3 14. axb3 a6 15. Nf3 Qd5 16. Bg5 Rfe8 17. Rad1 {1-0 (45) Zhigalko,S (2655)-Tukhaev,A (2564) Minsk 2015}) 8. h3 a5 9. a4 O-O 10. O-O Na6 11. Be3 {LiveBook: 3 Games} c6 12. Ne1 $146 ({Predecessor:} 12. Na3 Nc7 13. Rad1 f6 14. Qd2 Be6 15. Qe2 Nd7 16. Rfe1 Bf7 17. Bf4 Ne6 18. Bh2 Qb6 19. Qd3 Qb4 20. Re2 f5 21. Rde1 Rfd8 22. Qd1 Qb6 23. c3 Rac8 {½-½ (23) Tari,A (2509)-Rozentalis,E (2549) Fagernes 2015}) 12... f6 13. f4 Be6 14. Nd2 {[%cal Bb1d2,Bd2e4,Be4g5,Bg5f3,Bf3h4][%mdl 32]} fxe5 15. dxe5 c5 16. c3 Qd7 17. Qb5 Qc6 18. Ne4 $36 {[%mdl 2048] Black is under pressure.} Rac8 19. Ng5 Bd7 20. Qe2 Nc7 21. Kh2 h6 (21... Bh6 $11) 22. Ngf3 $16 Be6 23. Nh4 d4 24. Bxe6+ $1 ({Inferior is} 24. Nxg6 Rf7 $11) 24... Qxe6 25. cxd4 cxd4 26. Bxd4 Ncd5 (26... Rcd8 $16) 27. Nd3 $18 Rc4 28. Bxb6 (28. Qe4 $18) 28... Qxb6 $14 29. g3 Rfc8 {White must now prevent ...Rc2.} 30. Rfc1 g5 31. Ng2 gxf4 32. gxf4 Qd4 (32... e6 $16 {was necessary.}) 33. Rxc4 $18 Rxc4 34. Rd1 $1 Qb6 35. Rg1 (35. Nc1 $18 Rd4 36. Rxd4 Qxd4 37. Qd3 Qxd3 38. Nxd3) 35... Qc6 36. Qf3 {Strongly threatening Qg3.} Rc2 37. Kh1 Nb4 (37... e6 $16 {was worth a try.}) 38. Qxc6 Nxc6 (38... Rxc6 $142 39. Nxb4 axb4) 39. Ne3 Rd2 40. Nc5 $1 {[%cal Rc5e6]} Nd4 41. Rd1 ({Don't blunder} 41. Nxb7 $2 Rxb2 42. Nxa5 Nf3 $19) 41... Rxd1+ 42. Nxd1 {[%mdl 4096] Endgame KBN-KNN} b6 {[#]} 43. Nd3 $1 Kf7 44. Ne3 Kg6 (44... b5 $16) 45. Kg2 e6 $2 (45... h5 46. Kg1 Bf8) 46. Nc4 Bf8 47. Kf2 Kf5 {intending ...Ke4.} 48. Nd6+ Kg6 {[#]} 49. Ke3 $1 {[%cal Re3d4]} Nc6 50. Ke4 Kh5 51. f5 exf5+ 52. Nxf5 Kg6 53. Nf4+ Kf7 54. Nd4 Nd8 55. Kd5 Nb7 56. Nd3 Kg6 57. Ne6 Be7 58. Ke4 (58. Kc6 $142) 58... Kf7 59. Kf5 Bb4 $2 (59... Ke8 60. Nc7+ Kd7) 60. Nc7 {White is clearly winning.} Bd2 61. Nd5 b5 62. axb5 a4 63. Nb6 {Precision: White = 63%, Black = 35%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Erenburg, Sergey"]
[Black "Zapata, Alonso"]
[Result "1/2-1/2"]
[ECO "B82"]
[WhiteElo "2550"]
[BlackElo "2420"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,90,64,21,43,39,54,56,79,65,54,59,149,125,54,17,129,126,123,104,114,116,112,45,38,35,36,19,33,16,28,0,26,-58,-43,-41,-29,-59,-58,-64,-56,-58,-58,-54,-52,-56,-40,-82,-77,-107,-107,-187,-58,-128,-111,-120,-123,-118,-126,-126,-121,-127,-100,-118,-121,-118,-125,-139,-135,-178,-185,-194,-76,-96,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 Nf6 7. f4 d6 8. Qf3 a6 9. O-O-O Bd7 10. Nb3 {LiveBook: 3 Games. B82: Sicilian Scheveningen: 6 f4} Rc8 11. Bd3 Nb4 12. Kb1 {White is slightly better.} b5 13. g4 {[%cal Bg2g4,Bg4g5][%mdl 32]} Bc6 14. g5 {[#]} Nxe4 $146 (14... Nxd3 $14 15. cxd3 (15. gxf6 Nxb2 16. Kxb2 gxf6 $16) 15... Nd7) ({Predecessor:} 14... Nd7 15. Qf2 g6 16. Rhf1 Bg7 17. f5 Ne5 {1-0 (39) Kramnik,V (2807)-Topalov,V (2743) Monte Carlo 2003}) 15. Bxe4 {Strongly threatening f5.} d5 16. Nxd5 (16. Bd3 d4 $17) 16... Bxd5 (16... exd5 $11 17. Bf5 d4) 17. c3 Bxe4+ 18. Qxe4 Qc6 19. Qd4 $1 Nd5 20. f5 ({White should try} 20. Rhe1 $16) 20... Nxe3 $14 21. Qxe3 Bc5 $1 {[%cal Rc5e3]} 22. Qh3 {And now g6! would win.} Qe4+ 23. Ka1 {Hoping for fxe6.} O-O {[%cal Bh8f8,Bf8d8,Bd8d7][%mdl 32]} 24. f6 Qg6 25. Qf3 (25. fxg7 $11 Qxg7 26. Qf1) 25... Qxg5 $15 26. fxg7 Rfd8 $1 27. Rdf1 {[%csl Gf1][%cal Rf3f7]} Rd7 $1 28. Nxc5 Qxc5 29. Rhg1 b4 30. cxb4 Qxb4 31. a3 Qb6 $40 {[%mdl 128] Black attacks.} 32. Rg2 Qc6 33. Qh3 Rcd8 34. Rgg1 {[#]} (34. Qg4 $17 {keeps fighting.}) 34... Qc2 (34... Rd3 $1 $19 {[%cal Rd3h3]} 35. Rg3 Rd1+ 36. Rxd1 Rxd1+ 37. Ka2 Qd5+ 38. Rb3 a5) 35. Rc1 (35. Qh5 $15) 35... Rd1 $17 36. Rgxd1 Rxd1 37. Rxd1 Qxd1+ {[%mdl 4096] Endgame KQ-KQ} 38. Ka2 Qd5+ 39. Ka1 a5 40. Qc3 e5 41. b4 axb4 ({Much weaker is} 41... Kxg7 $6 42. bxa5 Qh1+ 43. Ka2 $11) 42. axb4 Kxg7 43. Kb2 f5 44. Qg3+ {[#]} Kf7 (44... Kf8 $1 $19 {has better winning chances. Threatens to win with ...f4.} 45. Qh4 e4 46. Qf6+ Ke8 47. Qh8+ Kd7 48. Qxh7+ Kc6) 45. Qh3 Kg6 {Precision: White = 40%, Black = 52%.} ({Black should play} 45... Qd2+ $17 46. Kb3 Qd1+ 47. Ka3 Qa1+ 48. Kb3 Qb1+ 49. Ka4 Qa2+ 50. Kb5 Qd5+ 51. Kb6 Qd6+ 52. Ka5 Qd8+ 53. Ka6 Qc8+ 54. Ka5 Qd8+ 55. Ka6 Qd6+ 56. Ka5 Qd8+) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Mekhitarian, Krikor Sevag"]
[Black "Prasca Sosa, Rafael Felipe"]
[Result "1/2-1/2"]
[ECO "B48"]
[WhiteElo "2542"]
[BlackElo "2400"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,118,39,39,29,39,35,45,46,40,45,41,37,32,52,51,75,60,62,73,87,90,80,101,107,101,93,103,49,53,52,57,14,14,14,10,14,0,0,8,9,0,0,0,0,0,-8,-8,-4,8,8,8,16,16,8,8,8,8,8,8,8,8,8,8,8,8,8,27,25,26,26,17,14,25,8,8,8,8,0,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qf3 {B48: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 without Be2} Bd6 (7... Nf6 8. O-O-O Rb8 9. Be2 d6 10. Qg3 Nxd4 11. Bxd4 e5 12. Ba7 Ra8 13. Be3 b5 14. f4 Bb7 15. fxe5 Nxe4 16. Nxe4 Bxe4 {1-0 (42) Nepomniachtchi,I (2767)-Adhiban,B (2666) Doha 2016}) 8. O-O-O {[#] aiming for Ndb5!} Be5 $1 9. g3 {White is slightly better.} Nf6 10. Qe2 d6 11. Bg2 Nxd4 12. Bxd4 Bxd4 13. Rxd4 e5 14. Rd3 Be6 {[#]} 15. Qd2 $146 Ke7 16. Rd1 Rhd8 17. b3 Rac8 18. f4 b5 19. Kb2 (19. a3 $16) 19... b4 $14 20. Na4 a5 21. c3 (21. h3 {looks sharper.} Bd7 22. Rxd6 Bxa4 23. Rxd8 Rxd8 24. Qxd8+ Qxd8 25. Rxd8 Kxd8 26. bxa4 Kc7 27. c3) 21... Bg4 {[#]} 22. fxe5 $1 {[%mdl 512]} dxe5 23. Rxd8 Rxd8 24. Qxd8+ Qxd8 25. Rxd8 Kxd8 $11 {[%mdl 4096] Endgame KBN-KBN} 26. Nc5 bxc3+ $1 27. Kxc3 Kc7 28. Bf1 Bf3 29. Bc4 Bxe4 30. Bxf7 Bd5 31. Bxd5 Nxd5+ {KN-KN} 32. Kc4 Kc6 33. Ne6 {Hoping for Nd8+.} Ne3+ 34. Kd3 Nf1 35. Ke4 Nxh2 36. Nxg7 Ng4 37. Nf5 Kb5 38. a3 a4 39. b4 Nf2+ $1 40. Kd5 ({Not} 40. Kxe5 Ng4+ 41. Kd4 Nh2 $18) 40... Nd3 41. Nd6+ Kb6 42. g4 Ne1 $1 {The position is equal.} 43. Nc4+ (43. Kxe5 $5 {[%cal Rd6c4]} Nc2 44. Nc4+ Kb5 45. Nd6+ Kb6 46. Nc4+ Kb5 47. Nd6+ Kb6 $11) 43... Kb5 44. Nd6+ Kb6 $1 45. Ne4 {White wants to play Nc3.} Nc2 46. Nc3 Ne3+ 47. Kxe5 {Black must now prevent Nd5+.} Nxg4+ 48. Kd4 h5 {[%cal Bh7h5,Bh5h4,Bh4h3][%mdl 32]} 49. Nxa4+ Kc6 50. Nc3 h4 51. Ke4 h3 52. Kf3 Ne5+ 53. Kg3 Nc4 54. a4 Nb2 55. b5+ Kb6 56. Nd5+ Kc5 57. b6 Kc6 58. a5 Nc4 59. a6 {b7 is the strong threat.} Nxb6 {Precision: White = 72%, Black = 90%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Garcia Pantoja, Roberto"]
[Black "Henao, Bernardo Andres"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2500"]
[BlackElo "2059"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,86,54,9,61,15,52,31,31,31,20,27,27,29,35,44,67,-3,0,0,119,119,115,119,121,122,143,156,155,152,164,151,152,131,180,174,258,174,189,174,191,193,208,210,345,338,607,597,602,602,545,612,649,593,589,560,537,492,29969,29971,29971,29971,29968,29966,29981,29982,29982,29983,29982,29983,29984,29985,29985,29986,29994]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. Nc3 Re8 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves} ({Black should play} 8... Nxc3 $11 9. bxc3 Nc6) (8... Nxc3 9. bxc3 Nd7 10. Re1 Re8 11. Bg5 f6 12. Bh4 Rxe1+ 13. Qxe1 Nb6 14. Qe3 Qf8 15. Nd2 Bg4 16. Bg3 Bd7 17. c4 {½-½ (38) Feygin,M (2468)-Jobava,B (2698) Germany 2017}) 9. Re1 Bf5 10. Bg5 $146 ({Predecessor:} 10. Bxe4 dxe4 11. Ng5 h6 12. Ngxe4 Bxh2+ 13. Kxh2 Qh4+ 14. Kg1 Bxe4 15. Rxe4 Rxe4 16. Nxe4 Qxe4 {1-0 (37) Guntorojati,I-Pham,Q Yungtau 2000}) 10... Nxg5 {White is slightly better.} 11. Rxe8+ Qxe8 12. Nxg5 Qd7 13. Qf3 Bxd3 $1 14. Qxd3 g6 15. Re1 $40 {[%mdl 128] White has some attack.} (15. Nxd5 $14 Bxh2+ 16. Kxh2 Qxd5 17. Qh3 Qxg5 18. Qc8+ Kg7 19. Qxb7) 15... Nc6 16. Qb5 Re8 (16... Rd8 $1 $11) 17. Rxe8+ $16 Qxe8 18. Nf3 Qe6 19. Qxd5 Nb4 20. Qxb7 Nxc2 21. Qxa7 Ne1 22. Qa8+ Kg7 23. g3 Nxf3+ 24. Qxf3 Qe1+ 25. Kg2 Qd2 26. b3 Qxd4 27. Nb5 Qb6 28. Nxd6 cxd6 $18 {[%mdl 4096] Endgame KQ-KQ} (28... Qxd6 {keeps fighting.} 29. Qc3+ Kf8) 29. Qd5 h5 $2 {[#]} (29... Kf6 30. a4 Ke7) 30. h4 Kf8 31. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Ke7 32. a5 Qa6 33. b4 {[%cal Bb3b4,Bb4b5,Bb5b6,Bb6b7][%mdl 32]} f6 34. Kg1 f5 35. Kg2 Kd7 (35... f4 $18 36. gxf4 Qc8) 36. b5 {White mates.} Qxa5 {[#]} 37. Qc6+ $1 Ke6 38. b6 Qb4 39. b7 Kf6 40. Qc8 Qe4+ 41. Kh2 Qf3 42. Qh8+ Ke6 43. Qb2 Kd5 {Precision: White = 80%, Black = 41%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Barrientos, Sergio E"]
[Black "Pichot, Alan"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2463"]
[BlackElo "2577"]
[Annotator "TA"]
[PlyCount "183"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,183,3,15,-17,-6,-12,0,0,0,0,0,0,0,-22,-15,-25,-25,-47,-37,-42,-33,-12,-36,-62,-45,-45,0,0,0,0,15,-22,120,101,149,141,179,171,236,229,239,238,231,130,132,120,170,176,169,154,295,267,350,338,350,327,319,317,317,301,289,260,388,260,260,242,338,335,285,281,268,270,316,302,322,322,307,304,306,237,881,912,883,869,684,687,516,375,738,370,837,720,2242,2235,2062,1950,2251,1950,5604,700,1807,5297,5097,1037,5387,5102,5056,2646,1929,2341,2117,0,962,1380,1622,407,1733,1243,1567,1389,1552,1567,1571,1396,1400,1354,1323,1970,2105,1845,29968,29969,29969,29970,29970,29971,29971,29972,29972,29973,29973,29967,29978,29972,29977,29974,29974,29975,29976,29976,29976,29977,29978,29979,29981,29982,29982,29983,29983,29984,29984,29985,29985,29986]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 O-O 5. a3 Be7 6. e4 d5 7. e5 Nfd7 8. cxd5 exd5 9. Bd3 c5 10. O-O Nc6 11. Re1 a5 {LiveBook: 34 Games} 12. Bb5 $146 {E11: Bogo-Indian} ({Predecessor:} 12. Qc2 h6 13. b3 cxd4 14. Bb2 Nc5 15. Nxd4 Nxd4 16. Bxd4 Nxd3 17. Qxd3 Qd7 18. Be3 Ra6 19. Nf3 Rg6 20. Nd4 Qg4 {1-0 (86) Oparin,G (2625)-Lomasov,S (2450) Moscow 2017}) 12... Qb6 13. a4 cxd4 14. Nb3 $1 {The position is equal.} Nc5 15. Nfxd4 Nxb3 16. Nxb3 d4 17. Bd2 Be6 18. Qf3 Rfd8 19. Rac1 Rd5 20. Qg3 Rxb5 21. axb5 Qxb5 22. Bh6 $1 {[%csl Gh6][%cal Rg3g7]} Bf8 23. Nc5 $1 Kh8 24. Nxe6 $40 {[%mdl 128] White attacks.} fxe6 25. Bd2 d3 26. Bc3 Bc5 (26... Nd4 $1 $11) 27. Rcd1 Rf8 28. Rd2 Qc4 29. Rf1 $1 b5 (29... Rd8 $142 30. Rfd1 Rf8 31. Qxd3 Qxd3 32. Rxd3 Bxf2+ 33. Kf1 Kg8) 30. Qxd3 $18 ({Less strong is} 30. Rxd3 b4 $14) 30... Qxd3 31. Rxd3 b4 {[#]} 32. Bd2 (32. b3 $1 $18) 32... Nxe5 $16 33. Rg3 Nc4 34. Bc1 Bd4 35. b3 Nd6 (35... Na3 $16 36. Be3 e5 37. Bxd4 exd4) 36. Be3 $18 Bf6 37. Bc5 Rd8 {White should prevent ...Ne4.} 38. Rd1 Ne4 {[%cal Rd8d1]} 39. Rxd8+ Bxd8 {[%mdl 4096] Endgame KRB-KBN} 40. Rd3 {[%cal Rd3d8]} Bf6 41. Bb6 Kg8 (41... Nc3 {keeps fighting.} 42. Rd7 a4) 42. f3 Nc3 43. Bxa5 Ne2+ 44. Kf1 Nc1 45. Rd6 Nxb3 46. Bxb4 Kf7 47. Rd7+ Kg6 48. Ke2 Nd4+ 49. Kd3 Nc6 {White must now prevent ...Ne5+.} 50. Bc3 Ne5+ $2 (50... Bxc3 51. Kxc3 Kf6) 51. Bxe5 $1 Bxe5 {KR-KB} 52. g3 Kf5 53. Rf7+ Bf6 54. Ke3 Kg6 $2 (54... h5 55. Ra7 Bc3) 55. Rf8 Be7 $2 (55... Kf5 56. g4+ Kg6) 56. Rb8 Bc5+ 57. Ke4 Kf6 58. f4 Bg1 59. h3 h6 60. Rf8+ (60. g4 $142 Bf2 61. Rc8) 60... Ke7 61. Rc8 (61. Rh8 $142 Bf2 62. g4) 61... Bf2 62. g4 Bh4 63. Rc7+ Kf6 64. Rc6 Kf7 65. Ke5 Bf6+ 66. Ke4 (66. Kd6 $142 Bh4 67. Rc7+ Kf6 68. Re7) 66... Bh4 $1 67. Rc5 Bd8 68. Rc8 (68. Rc1 $142 Bh4 69. Rc7+ Kf6 70. Ra7) 68... Bh4 69. Rb8 Be1 70. Rb5 Bh4 71. Ke5 Bf6+ {[#]} 72. Kd6 $1 Be7+ 73. Kd7 Bh4 74. Re5 Bg3 75. Re4 Bh2 76. h4 {[%cal Bh3h4,Bh4h5][%mdl 32] White mates.} Bg3 77. h5 Bh2 78. Kd6 Bg3 79. Ke5 Bh4 80. Ra4 Bf6+ 81. Ke4 Bc3 82. Rc4 Bb2 83. Rc7+ Kf6 84. Rc5 Ke7 85. Rb5 Bc3 86. g5 hxg5 87. fxg5 Bd2 88. Rb7+ Kf8 89. g6 Bc3 90. Rf7+ Ke8 91. Rc7 Bf6 92. h6 {Precision: White = 71%, Black = 46%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Martinez Romero, Martin"]
[Black "Cordova, Emilio"]
[Result "0-1"]
[ECO "A10"]
[WhiteElo "2427"]
[BlackElo "2651"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,77,0,0,0,9,0,0,0,11,13,28,18,36,22,45,21,42,15,35,31,189,8,41,47,46,42,34,31,30,0,0,0,0,0,0,0,0,0,0,-11,-11,-11,-9,-1,-14,-14,6,0,0,-132,-129,-240,0,-446,-441,-535,-536,-589,-592,-29990,-29991,-29991]} 1. c4 b6 2. Nf3 Bb7 3. b3 (3. Nc3 Nf6 4. g3 e6 5. Bg2 Bb4 6. Qc2 O-O 7. O-O c5 8. a3 Bxc3 9. Qxc3 d5 10. cxd5 Nxd5 11. Qc2 Nc6 12. b3 e5 13. Bb2 Re8 14. e3 Nf6 15. d3 Qd7 16. Rfd1 Rad8 17. Rac1 h6 18. h3 Ba8 19. Bc3 {½-½ (43) Wojtaszek,R (2749)-Ponomariov,R (2709) Tallinn 2016}) 3... c5 4. Bb2 d6 5. g3 Nd7 6. Bg2 {A10: English Opening: Unusual Replies for Black} Ngf6 7. O-O g6 8. d3 $146 ({Predecessor:} 8. Nc3 Bg7 9. e3 O-O 10. d4 a6 11. a4 h6 12. d5 Ne4 13. Qc2 Nxc3 14. Bxc3 Bxc3 15. Qxc3 Qc7 16. Nd2 Nf6 17. e4 e5 18. f4 {1-0 (41) Vitouch,A (2230)-Gocheva,R (2180) Velden 2008}) 8... Bg7 9. Nbd2 O-O {LiveBook: 8 Games} 10. e4 Qc7 11. Qc2 e6 12. Rfe1 Rfd8 13. a3 Ne5 14. b4 Rac8 15. b5 Nfd7 16. Ra2 a5 17. h3 Nf8 18. Nh2 d5 $2 {[#]} (18... g5 $1 $14) 19. f4 $2 (19. exd5 $1 $18 {Hoping for f4.} exd5 20. f4 Nxd3 21. Qxd3 dxc4 22. Qxc4 Bxg2 23. Bxg7) 19... Nxd3 (19... dxc4 $5 {[%cal Re5d3]} 20. Bxe5 Bxe5 21. fxe5 cxd3 $11) 20. Qxd3 dxe4 21. Qe2 {And now Bxg7 would win.} f5 22. Bxg7 Qxg7 23. Qf2 (23. Nxe4 $5 fxe4 24. Bxe4 $11) 23... Rd3 24. Bf1 Rd6 25. Bg2 Rcd8 26. Nhf1 e5 27. fxe5 Qxe5 28. g4 Ne6 29. gxf5 gxf5 {White must now prevent ...Nf4.} 30. Nf3 $1 {[%cal Rf3e5]} Qf6 $1 31. Nh4 $1 {[%cal Rh4f5]} Nd4 32. Qf4 {Strongly threatening Rf2.} Ne6 33. Qxf5 (33. Qf2 $11 {keeps the balance.} Nd4 34. Qf4) 33... Qxh4 $17 34. Bxe4 (34. Rf2 $17 Rf8 35. Qg4+ Qxg4 36. Rxf8+ Kxf8 37. hxg4) 34... Ng5 $2 (34... Nf4 $19 35. Qxh7+ Qxh7 36. Bxh7+ Kxh7 37. Re7+ Kh8 38. Rxb7 Rg8+ 39. Kh1 Rdg6) 35. Bxb7 $2 {[%mdl 8192]} (35. Rg2 $1 $11 {and White stays safe.} Rg6 36. Bxb7 Nxh3+ 37. Kh1 Ng5+ 38. Kg1 Nh3+ 39. Kh1 Ng5+ 40. Kg1 Nh3+) 35... Nxh3+ $19 (35... Qxe1 $2 36. Rg2 $19) 36. Kh1 {[#] Bd5+ is the strong threat.} Rf6 $1 {[%cal Rf6f5]} 37. Bd5+ Kh8 38. Qe5 Nf2+ 39. Kg1 {Precision: White = 38%, Black = 48%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Panesso Rivera, Henry"]
[Black "Iturrizaga Bonelli, Eduardo"]
[Result "1/2-1/2"]
[ECO "A50"]
[WhiteElo "2421"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,54,24,31,25,77,60,72,51,62,59,59,58,53,54,58,39,73,61,76,39,64,36,45,0,0,0,0,0,0,0,6,7,24,19,27,7,44,0,23,0,58,0,24,0,54,0,27]} 1. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} Nf6 2. c4 b6 3. Nc3 Bb7 4. f3 Nc6 5. e4 e5 6. d5 {A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6)} Ne7 (6... Nd4 $11 {keeps the balance.}) 7. g3 Nc8 $146 ({Predecessor:} 7... Ng6 8. Be3 c6 9. d6 Ba6 10. c5 Bxf1 11. Kxf1 bxc5 12. Bxc5 {1-0 (62) Granda Zuniga,J (2648)-Iturrizaga Bonelli,E (2658) Mexico City 2016}) 8. Be3 {White is better.} Bc5 9. Bxc5 bxc5 10. Nh3 O-O 11. Bd3 d6 12. Qe2 Qd7 13. Nf2 a5 14. a4 Ba6 15. b3 Ne7 16. Ng4 Nxg4 17. fxg4 Rab8 18. Rb1 Bc8 19. h3 c6 20. Qd2 Qd8 21. O-O Bd7 22. Kh2 Rb7 23. Qc2 Nc8 24. Qd2 Ne7 25. Qc2 (25. g5 $14) 25... Nc8 26. Qd2 Ne7 27. Qc2 (27. g5 $14) 27... Nc8 {Precision: White = 31%, Black = 34%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Duran Vega, Sergio"]
[Black "Peralta, Fernando"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2408"]
[BlackElo "2569"]
[Annotator "TA"]
[PlyCount "48"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,48,0,0,7,32,34,16,32,31,10,14,10,10,11,25,32,28,18,47,21,58,41,46,41,48,38,46,38,42,43,34,42,36,39,49,49,49]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O Nbd7 8. Qc2 {E11: Bogo-Indian} Ne4 (8... c6 9. Rd1 b6 10. b3 a5 11. Bc3 Ne4 12. Ne5 Nxe5 13. Bxe4 f5 14. Bxd5 exd5 15. dxe5 f4 16. cxd5 cxd5 17. Bd4 Ba6 18. Qc6 Bxe2 {½-½ (28) Ding,L (2773)-Giri,A (2785) Moscow 2017}) 9. Nc3 Nxd2 10. Nxd2 {The position is equal.} c6 11. Rad1 f5 12. e3 Rb8 $146 ({Predecessor:} 12... g6 13. a3 Rb8 14. b4 b5 15. cxb5 cxb5 {0-1 (35) Clery,N (2333)-Strugnell,C (2079) France 2003}) 13. Ne2 Bd6 14. Nf4 Qe7 15. Nd3 Nf6 16. Nf3 Bd7 17. Nfe5 {White is slightly better.} Be8 18. Rb1 Nd7 19. Nxd7 Bxd7 20. f4 a5 21. a3 b5 22. c5 Bc7 23. b4 a4 24. h4 h5 {Precision: White = 64%, Black = 52%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Panjwani, Raja"]
[Black "Bacallao Alonso, Yusnel"]
[Result "0-1"]
[ECO "D37"]
[WhiteElo "2404"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,96,-14,-9,-44,0,-29,-13,-9,0,-3,0,-9,-9,-43,-37,-65,-68,-78,-75,-89,-83,-75,-81,-79,-84,-84,-73,-106,-112,-114,-112,-106,-103,-104,-104,-159,-142,-151,-157,-196,-152,-252,-151,-151,-151,-129,-140,-135,-143,-142,-139,-213,-124,-269,-224,-201,-162,-227,-217,-311,-273,-322,-316,-287,-270,-354,-362,-648,-641,-618,-611,-29990,-29991,-29991,-29992,-29993,-29994,-29994,-29995,-29998,-29999]} 1. Nf3 Nf6 2. c4 e6 3. d4 d5 4. e3 Be7 5. Nc3 O-O 6. Bd3 dxc4 7. Bxc4 a6 8. a4 c5 9. O-O Nc6 {LiveBook: 42 Games} 10. Bd3 {D37: Queen's Gambit Declined: 5 Bf4} (10. dxc5 Bxc5 11. h3 b6 12. e4 Qxd1 13. Rxd1 Bb7 14. e5 Na5 15. Ba2 Ne4 16. Nxe4 Bxe4 17. Be3 Nc6 18. Bxc5 bxc5 {½-½ (64) Zhou,J (2578)-Lysyj,I (2691) China 2015}) 10... Qc7 11. Qe2 Rd8 {[%cal Rc5d4]} 12. dxc5 {The position is equal.} Nb4 $146 ({Predecessor:} 12... Bxc5 13. e4 Ng4 14. g3 Nge5 15. Nxe5 Nxe5 16. Bf4 Bd6 17. Rfd1 Bd7 18. Be3 Nxd3 19. Rxd3 Bc6 20. a5 Qe7 21. Bb6 Bc7 22. Rad1 Rxd3 23. Qxd3 h6 24. Qe3 {½-½ (24) Ortega Serra,M (2173)-Leiro Giralt,D (2242) Llinars del Valles 2010}) 13. Bb1 Qxc5 14. e4 e5 15. Be3 Qa5 $36 {[%mdl 2048] Black has good play.} 16. Nd2 Bg4 17. f3 Be6 18. Nc4 Bxc4 19. Qxc4 Rac8 20. Qe2 Bc5 21. Bxc5 Qxc5+ 22. Qf2 Rd4 23. Re1 Qd6 24. Re2 Nd7 {[%cal Bf6d7,Bd7c5,Bc5b3][%mdl 32]} 25. g3 Nc5 {And now ...Nb3 would win.} 26. Ba2 (26. Ra3 $142) 26... Nxa2 $17 27. Rxa2 Nb3 {White must now prevent ...Nc1.} 28. Rc2 h5 29. Kg2 {[#]} (29. Ra3 $17 Rd1+ 30. Kg2) 29... h4 $1 {[%mdl 512]} 30. Ra3 (30. gxh4 Rd3) 30... Rd3 31. Rxb3 h3+ $1 32. Kxh3 Qe6+ 33. Kg2 Qxb3 34. Rd2 {[#]} (34. Re2 $17 {was called for.}) 34... Rd4 $1 {[%mdl 512]} 35. h4 (35. Re2 $17) (35. Rxd4 exd4) 35... Rxd2 36. Qxd2 $19 {[%mdl 4096] Endgame KQR-KQN} Qb4 37. Kh3 (37. h5 $142) 37... Qd4 38. Qg5 (38. Qe2 {was worth a try.}) 38... Qd7+ $1 39. g4 Qd3 $1 {[%cal Rd3f3]} 40. Kg3 {[#]} Qd4 $1 41. h5 Rc6 ({Weaker is} 41... Qg1+ 42. Kh3 $19) 42. Kg2 $2 {[#]} (42. Qc1 Qxa4 43. Qe1) 42... b5 $1 {[%mdl 512]} 43. axb5 axb5 44. Nd5 {aiming for Ne7+.} Rc2+ {Black mates.} 45. Kh3 Qg1 {[%csl Gc2][%cal Rg1h2]} 46. Ne7+ Kh8 {[%csl Gc2][%cal Rg1h2]} 47. Ng6+ {[#]} Kh7 $1 {[%csl Gc2][%cal Rg1h2]} 48. Qxe5 Qh1+ {Precision: White = 44%, Black = 85%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Garcia, Gildardo"]
[Black "Ramirez, Alejandro"]
[Result "0-1"]
[ECO "B85"]
[WhiteElo "2396"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,87,0,0,-3,-7,-6,0,0,0,-79,-75,-85,-32,-74,-74,-85,-61,-87,-62,-65,-17,-4,0,0,0,0,0,-87,-86,-134,-79,-79,-79,-79,-79,-80,-79,-81,-87,-87,-88,-274,-245,-222,-210,-290,-261,-302,-288,-285,-268,-6079,-5577,-5322,-5281,-5314,-5285,-3254]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be2 a6 7. O-O Nf6 8. Be3 Be7 9. f4 d6 10. a4 O-O 11. Bf3 Rd8 12. Kh1 Ne5 13. Ndb5 axb5 14. Nxb5 Qc6 {B85: Sicilian Scheveningen: 6 Be2 a6, lines with early Be3} 15. fxe5 dxe5 16. Qe2 b6 {LiveBook: 4 Games. The position is equal.} 17. Qf2 (17. b3 Bb7 18. Rad1 h6 19. Rxd8+ Bxd8 20. Qf2 Kh7 21. Rd1 Be7 22. Bxb6 Nxe4 {½-½ (51) Sikula,V (2540)-Ftacnik,L (2562) Austria 2008}) 17... Nd7 18. b3 Bb7 $146 ({Predecessor:} 18... Ba6 19. c4 Bc5 20. Rfd1 {0-1 (73) Landa Medrano,G (2040)-Palacios,E (2160) Lima 2015}) 19. Rad1 Nc5 20. Bxc5 (20. Be2 $11 f6 21. Nc3) 20... Qxc5 $17 21. Qe2 Qb4 (21... Bc6 $17) 22. g3 Bc6 23. Bg2 Rf8 24. Rb1 Bc5 25. Nc7 Rad8 {[#] Threatens to win with ...Rd2.} 26. Na6 Qd2 27. Qxd2 Rxd2 28. Nxc5 bxc5 29. c3 (29. Kg1 $11 {remains equal.}) 29... Ra8 30. Rbd1 Rxd1 (30... Rb2 $142 31. Rb1 Rc2) 31. Rxd1 {[%mdl 4096] Endgame [#] KRB-KRB} c4 $1 {[%mdl 512]} 32. b4 (32. bxc4 Kf8) 32... Bxa4 33. Ra1 Bc6 34. Rxa8+ Bxa8 {KB-KB} 35. Kg1 Kf8 36. Bf1 $2 (36. Kf2 $17) 36... Bxe4 $19 37. Bxc4 g5 38. Kf2 Ke7 39. Be2 Kd6 40. c4 f5 41. Bf3 $2 (41. Ke3) 41... Bxf3 {Black is clearly winning.} 42. Kxf3 e4+ 43. Ke3 Ke5 44. b5 {Precision: White = 31%, Black = 69%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Ynojosa Aponte, Felix Jose"]
[Black "Kaidanov, Gregory S"]
[Result "1-0"]
[ECO "D44"]
[WhiteElo "2395"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,77,12,0,0,0,0,0,0,-17,0,0,19,35,172,192,208,175,294,342,337,320,279,235,460,441,555,549,536,521,582,596,613,603,601,578,612,595,598,595,622,552,667,663,700,687,1211,1164,1555,1546,1486,1462,2004,1846,2439,2419]} 1. c4 e6 2. Nc3 d5 3. d4 c6 4. Nf3 Nf6 5. Bg5 dxc4 6. e4 {[%cal Be2e4,Be4e5][%mdl 32]} b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. exf6 Qa5 12. Be2 {D44: Semi-Slav: Botvinnik System} Bb7 13. O-O {LiveBook: 13 Games} O-O-O $1 14. Qc2 {The position is equal.} c5 {[#]} 15. d5 $146 ({Predecessor:} 15. a4 b4 16. Ne4 Qc7 17. h4 b3 18. Qb1 cxd4 19. Bxc4 Kb8 {1-0 (31) Pelletier,Y (2591)-Hort,V (2471) Switzerland 2007}) 15... exd5 {...d4 is the strong threat.} 16. Qf5 Bd6 17. h4 Rhe8 {White must now prevent ...d4.} 18. Bf3 $36 {[%mdl 2048] White has good play.} d4 {[#]} (18... Re5 $14 19. Qh7 b4) 19. Bxb7+ $1 $18 Kxb7 20. Qd5+ Kc7 {[#]} (20... Kc8 $142) 21. a4 $1 {[%cal Ba2a4,Ba4b5,Bb5a6][%mdl 32]} (21. Ne4 Nxf6 22. Nxf6 Bh2+ 23. Kxh2 Rxd5 $14) 21... dxc3 22. axb5 Qb6 23. Ra6 ({And not} 23. bxc3 Re6 $11) 23... Re5 $2 (23... Re6 {keeps fighting.}) 24. Qxc4 {White is clearly winning.} Qxa6 25. bxa6 cxb2 26. f4 Re3 27. Rb1 Rb8 28. Qc2 ({Not} 28. Qxf7 Ra3 $16) 28... Reb3 29. h5 {[%cal Bh4h5,Bh5h6,Bh6h7][%mdl 32]} R3b4 30. h6 c4 31. h7 Bc5+ 32. Kh2 Bd4 33. Bh4 c3 34. Be1 Rb3 35. Qd3 c2 36. Qxc2+ Nc5 37. Qc4 Rd3 38. Qxf7+ Kc6 39. Qg8 {Precision: White = 91%, Black = 29%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Cori Quispe, Kevin Joel"]
[Black "Cuartas, Jaime Alexander"]
[Result "1-0"]
[ECO "C50"]
[WhiteElo "2390"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,67,22,19,7,0,0,0,0,-7,14,-61,-48,-50,-52,-49,-57,-69,-15,-11,-11,-14,-10,-2,-15,-7,-7,-27,0,-45,-30,-61,55,55,74,77,90,90,100,71,195,105,110,102,112,122,241,241,318,300,560,299,742,728,873,837,29994,29995]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. O-O O-O 6. Nbd2 {C50: Hungarian Defence and Giuoco Pianissimo} (6. a4 a5 7. Bg5 h6 8. Bh4 Be7 9. Bg3 d6 10. h3 Nd7 11. Re1 Kh8 12. c3 Nb6 13. Bb3 f5 14. exf5 Bxf5 {½-½ (25) Caruana,F (2808)-Aronian,L (2793) Stavanger 2017}) 6... a6 7. c3 {LiveBook: 93 Games} b5 8. Bd5 {The position is equal.} Nxd5 $146 ({Predecessor:} 8... Re8 9. Nb3 Bb6 10. d4 exd4 11. Nbxd4 Nxd5 12. exd5 Nxd4 13. Nxd4 Bb7 14. Qh5 {½-½ (27) Geletzke,H (1262)-Mueller,L (1126) Erfurt 2014}) 9. exd5 Ne7 10. Ne4 Ba7 11. c4 (11. d6 $11 cxd6 12. Nxd6) 11... d6 $15 12. Be3 f5 13. Nc3 b4 14. Ne2 Bxe3 (14... f4 $15 15. Bxa7 Rxa7) 15. fxe3 $11 c6 16. dxc6 Nxc6 17. d4 Bb7 18. Rc1 a5 19. Qc2 Qe7 20. d5 Nd8 21. e4 fxe4 (21... f4 $15) 22. Nd2 $14 Rxf1+ 23. Rxf1 Rc8 {White must now prevent ...Bxd5!} 24. Qxe4 Ne6 25. Qe3 Qg5 {[#]} (25... Nc5 $16) 26. Qxg5 ({White should play} 26. Qf2 $1 $18 {[%cal Rf2f7]} Rf8 27. Qb6) 26... Nxg5 $16 27. Ng3 {And now Nf5 would win.} Nf7 28. Nf5 Rd8 {[#]} (28... Rc7 $16 29. Ne3 g6) 29. Ne4 $1 $18 Rd7 30. Rf3 {aiming for Rg3.} Ba6 $2 (30... Bc8 {is a better defense.} 31. b3 h5) 31. b3 {Threatens to win with Rg3.} a4 $2 (31... Bc8 32. h4 a4 33. bxa4 h5) 32. Rg3 Kf8 33. Rxg7 {Threatening mate with Nf6.} Bxc4 34. Nf6 {Precision: White = 68%, Black = 38%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "6"]
[White "Sanchez, Sebastian Felipe"]
[Black "Morovic Fernandez, Ivan"]
[Result "0-1"]
[ECO "E01"]
[WhiteElo "2388"]
[BlackElo "2537"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,93,0,4,6,-7,0,0,0,0,0,0,0,-19,-14,-20,-10,-17,-27,-31,-29,-41,-49,-116,-120,-105,-47,-111,-108,-111,-111,-186,-172,-168,-133,-162,-85,-74,-29,-47,-51,-153,-45,-65,-28,-73,-47,-41,-42,-39,0,-108,-104,-374,-374,-1243,-1240,-1188,-1146,-944,-347,-331,-293,-1611,-439,-527,-527,-518,-518,-516,-511,-467,-460,-1639,-1617,-7512,-6307,-29990]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Nf3 Bb4+ 5. Bd2 Bd6 6. Qc2 O-O 7. Bg2 c6 8. O-O Nbd7 9. Bf4 Bxf4 10. gxf4 b6 {E01: Catalan: Early deviations} 11. cxd5 (11. Ne5 Nxe5 12. fxe5 Ng4 13. Nd2 Ba6 14. cxd5 cxd5 15. Nf3 Nh6 16. Bh3 f5 17. Kh1 Kh8 18. Rg1 {½-½ (27) Andreikin,D (2736)-Carlsen,M (2840) Wijk aan Zee 2017}) 11... cxd5 12. Nc3 Bb7 {The position is equal.} 13. e3 Qe7 14. Rfc1 Rfc8 15. Qe2 $146 ({Predecessor:} 15. Qd3 Ne4 16. Ne5 Nd6 17. Nxd7 Qxd7 18. a4 {0-1 (59) Chapman,T (2233)-Hovhannisyan,R (2630) London 2016}) 15... Ne4 16. Nxe4 dxe4 17. Nd2 f5 18. a3 Nf6 19. Bf1 Kh8 20. Kh1 (20. Rxc8+ $15 Rxc8 21. Nc4) 20... Rg8 $17 21. Bh3 Nd5 (21... g5 $17 22. fxg5 Rxg5) 22. Rg1 (22. Nc4 $1 $15) 22... Rac8 {...Rc2 is the strong threat.} 23. Nc4 Ba6 24. Rac1 (24. b3 $17) 24... Rc7 $19 25. b3 Rgc8 {And now ...b5 would win.} 26. a4 g6 (26... Nb4 $1 $19 27. Bf1 Nd3) 27. Bf1 $17 Qb4 28. Qa2 Kg7 29. Be2 {[#]} (29. Ra1 $15) 29... Bb7 (29... b5 $1 $17 {[%cal Rb5c4]} 30. axb5 Bxb5) 30. Qb2 $15 a5 {[%cal Ba7a5,Ba5a4,Ba4a3][%mdl 32]} 31. Rc2 Ba6 $36 {[%mdl 2048] White must now prevent ...b5. Black has some pressure.} 32. Rgc1 Kf8 33. Kg1 b5 34. axb5 (34. Ne5 $1 $11) 34... Bxb5 $17 {Strongly threatening ...a4.} 35. Bf1 $2 {[%mdl 8192] [#]} (35. Qa2 $17 {is the only way for White.}) 35... a4 $1 $19 {[%cal Ra4b3]} 36. Ne5 $2 (36. bxa4 Qxb2 37. Rxb2 Bxc4 38. a5) 36... a3 37. Rxc7 Rxc7 ({Worse is} 37... axb2 38. Rf7+ Kg8 39. Rxc8+ Be8 40. Rxe8+ Qf8 41. Rexf8#) 38. Qa1 Bxf1 $2 (38... Rxc1 39. Qxc1 Bxf1 40. Kxf1 a2) 39. Rxc7 Nxc7 40. Nc6 $2 (40. Kxf1 Nb5 41. Nd7+ Ke8 42. Nc5) 40... Qd6 (40... Qxb3 $142 41. Qc1 Bb5) 41. d5 {Threatens to win with Qh8+.} Kg8 {aiming for ...Bh3.} 42. Kxf1 Nxd5 43. Nd4 Qa6+ 44. Kg2 a2 45. Nc2 (45. Nxe6 $142 Qxe6 46. Qxa2) 45... Qe2 46. Qe5 Kf7 47. Kg1 {Precision: White = 34%, Black = 58%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Iturrizaga Bonelli, Eduardo"]
[Black "Terry, Renato"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "2663"]
[BlackElo "2454"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,115,22,10,43,26,39,47,85,85,86,83,79,62,79,67,79,75,72,77,90,84,114,103,110,81,116,106,104,114,116,112,112,112,112,112,112,112,112,112,112,112,117,116,122,102,102,102,102,0,112,96,126,126,164,150,171,171,171,171,171,171,201,164,156,126,225,225,295,291,6085,6412,6406,6078,29966,12772,29969,29970,29970,29971,29971,29972,29972,29973,29973,29974,29974,29975,29975,29976,29976,29977,29977,29978,29978,29979,29979,29980]} 1. d4 e6 2. Bf4 Nf6 3. e3 c5 4. c3 d5 5. Nd2 Bd6 6. Bg3 Nc6 7. Ngf3 {[%cal Bg1f3,Bf3e5,Be5g6][%mdl 32]} Bxg3 8. hxg3 Qd6 9. Bb5 Bd7 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} 10. Bxc6 (10. a4 h6 11. Qe2 a6 12. Bxc6 Bxc6 13. Ne5 Nd7 14. f4 Nxe5 15. fxe5 Qe7 16. Qg4 f5 17. Qh5+ Kd8 18. a5 c4 19. Kf2 {½-½ (19) Bachmann,A (2646)-Milov,V (2604) Chartres 2017}) 10... Bxc6 11. Ne5 {LiveBook: 19 Games} cxd4 {The position is equal.} 12. exd4 Nd7 13. Ndf3 f6 14. Ng6 $1 {[%cal Rg6h8]} Rg8 15. Rxh7 O-O-O 16. Qd2 Nf8 $146 ({Predecessor:} 16... Rde8 17. O-O-O {1-0 (36) Calvo Alfonso,V (2202)-Angullo Gil,J (2151) Valencia 2009}) 17. Nxf8 Rdxf8 18. O-O-O Be8 19. Qd3 Qc6 20. Re1 Bf7 21. g4 Qe8 {aiming for ...Bg6.} 22. Rh3 Rh8 23. Nh4 {[%cal Bf3h4,Bh4g6,Bg6f4][%mdl 32]} Qa4 24. Ng6 Rxh3 25. gxh3 Re8 26. a3 Qc4 27. Nf4 Qxd3 28. Nxd3 $16 {[%mdl 4096] Endgame KRB-KRN} Rh8 29. Re3 b6 30. Kd2 Kd7 31. Ke2 Kd6 32. Kf1 Bg6 33. Nf4 Bf7 34. Nd3 Bg6 $1 35. Kg2 a5 36. Kg3 a4 37. h4 Bxd3 38. Rxd3 {KR-KR} g6 39. Rd1 b5 40. Rh1 Ke7 41. Rh2 Kf7 42. f3 {[%cal Bf2f3,Bf3f4,Bf4f5,Bf5f6][%mdl 32]} Ke7 (42... Kg7 $16 {was worth a try.} 43. h5 gxh5) 43. h5 $18 gxh5 44. Rxh5 ({Weaker is} 44. gxh5 Rg8+ 45. Kf2 Rh8 $16) 44... Rxh5 $2 (44... Rg8 45. Rh7+ Kd6) 45. gxh5 {KP-KP} Kf7 {[#]} 46. Kg4 $1 Kg7 {[#]} 47. f4 $1 {[%cal Rf4f5]} Kh6 48. f5 {White mates.} e5 49. dxe5 fxe5 50. f6 e4 51. Kf4 Kh7 52. Ke3 Kh6 53. Kd2 Kh7 54. Kc2 Kh6 55. b3 axb3+ 56. Kxb3 Kh7 57. Kc2 Kh6 58. Kd2 {Precision: White = 84%, Black = 53%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Cordova, Emilio"]
[Black "Leiva, Giuseppe"]
[Result "1-0"]
[ECO "E15"]
[WhiteElo "2651"]
[BlackElo "2449"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,59,0,35,-18,-16,-20,18,-11,4,-2,-20,-35,10,-93,21,30,27,33,45,36,50,47,57,35,65,68,173,164,144,133,113,130,216,211,216,220,362,357,357,334]} 1. Nf3 Nf6 2. c4 b6 3. d4 e6 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 c6 7. Qc2 d5 8. O-O O-O 9. Rd1 Nbd7 10. b3 Ba6 11. a4 Rc8 12. Na3 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations} (12. a5 $14) (12. a5 c5 13. axb6 Qxb6 14. Qa2 Bb7 15. Ba5 Qa6 16. Qb2 dxc4 17. bxc4 Bxf3 18. Bxf3 cxd4 19. Bd8 Qd6 20. Bxe7 Qxe7 21. Rxa7 {1-0 (38) Wang,Y (2718)-Wang,H (2717) Huaian 2016}) 12... Ne4 $11 13. Be1 Bd6 14. b4 {The position is equal.} (14. a5 $5) 14... Qe7 $146 ({Predecessor:} 14... c5 15. dxc5 bxc5 16. cxd5 exd5 17. Nb5 cxb4 18. Qb3 Bxb5 19. axb5 Ndf6 20. Bxb4 Bxb4 21. Qxb4 {½-½ (28) Konopka,M (2448)-Galdunts,S (2464) Germany 2010}) 15. c5 Bb8 16. Qb2 f5 17. Rdc1 (17. b5 $11 {remains equal.} Bb7 18. cxb6 axb6 19. bxc6 Rxc6 20. Rdc1) 17... Qf6 (17... bxc5 $17 18. dxc5 Bb7) 18. b5 $36 {[%mdl 2048] White fights for an advantage.} Bb7 {[%cal Rb6c5]} 19. cxb6 axb6 20. bxc6 Bxc6 21. Nb5 f4 22. Rc2 fxg3 23. hxg3 g5 {[#]} (23... Bb7 $14) 24. Rac1 $1 $18 Bb7 {next ...Rxc2 is good for Black.} 25. Rxc8 Bxc8 26. Bb4 g4 (26... Rd8 $16 {was necessary.}) 27. Bxf8 Qxf8 28. Qa3 gxf3 (28... Qxa3 {is a better defense.} 29. Nxa3 Ba6) 29. Qxf8+ ({Not} 29. exf3 Qxa3 30. Rxc8+ {[#]} Qf8 $1 $16 {[%mdl 512]}) 29... Nxf8 30. exf3 {Precision: White = 60%, Black = 21%.} ({Weaker is} 30. Rxc8 fxe2 31. Rc1 Nxg3 $16) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Bruzon Batista, Lazaro"]
[Black "Garcia Pantoja, Roberto"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "2650"]
[BlackElo "2500"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,115,19,16,15,25,20,18,22,26,29,29,24,29,24,25,25,34,29,32,21,20,29,28,21,18,26,28,30,30,34,35,38,45,35,39,25,23,25,38,26,56,56,96,108,138,104,104,108,107,107,127,131,101,120,114,85,65,73,93,86,58,57,79,68,64,66,68,89,66,69,69,75,75,82,82,60,73,68,80,68,98,103,862,859,790,767,591,277,6597,6411,29974,29974,29976,29977,29976,29978,29977,29979,29979,29980,29980,29981]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Qc2 O-O 6. cxd5 exd5 7. Bg5 c6 8. e3 h6 9. Bf4 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2)} Bd6 (9... b6 10. Bd3 Bb7 11. O-O c5 12. Rad1 Nc6 13. Bf5 c4 14. a3 Bd6 15. Be5 Be7 16. Qe2 a6 {1-0 (48) Gareev,T (2609)-Kumar,N (2397) Cocoa Beach 2017}) 10. Bxd6 Qxd6 11. Bd3 {The position is equal.} Be6 12. O-O Nbd7 13. Rfc1 $146 ({Predecessor:} 13. b4 b5 14. a4 a6 15. Rfb1 Nb6 16. h3 Nc4 17. Qa2 Rab8 18. axb5 axb5 {1-0 (33) Mkrtchian,L (2484)-Yakovleva,T (2124) Plovdiv 2010}) 13... Rfe8 14. a3 a5 15. Rab1 Bg4 16. Nd2 Be6 17. Na4 Rec8 18. h3 b5 19. Nc5 Nxc5 20. Qxc5 Qxc5 21. Rxc5 Nd7 22. Rc2 Nb6 23. Nb3 Nc4 24. Nc5 a4 25. Re1 Re8 26. f3 {[%cal Bf2f3,Bf3f4][%mdl 32]} Rad8 27. Kf2 Bc8 28. e4 Nb6 29. e5 Nd7 30. f4 Nxc5 31. Rxc5 Bd7 32. g4 Rb8 33. Bf5 Bxf5 34. gxf5 $16 {[%mdl 4096] Endgame KRR-KRR} b4 35. Rec1 bxa3 36. bxa3 Rb2+ 37. R1c2 Rb3 38. R2c3 Rb2+ 39. Kf3 Rd2 40. Rxc6 Rxd4 41. Rc7 g5 42. fxg6 $1 fxg6 43. R3c6 $1 {[%cal Rc6g6]} g5 44. Rg6+ ({Don't play} 44. Rxh6 Rxf4+ 45. Kg3 Rxe5 $11) 44... Kf8 {[#]} 45. Rf6+ $1 Kg8 46. h4 ({But not} 46. Rxh6 Rxf4+ 47. Kg3 Rc4 $11) 46... gxf4 47. Rg6+ ({Reject} 47. Rxh6 Rxe5 48. Rg6+ Kf8 $11) 47... Kf8 48. Rxh6 {[%cal Rh6h8]} Re7 $2 {[%mdl 8192]} (48... Kg8 $16) 49. Rh8+ $18 Kg7 50. Rxe7+ Kxh8 {KR-KR} 51. h5 (51. Rd7 $142 {e6 is the strong threat.} Re4 52. Rxd5 Re3+ 53. Kxf4 Rxa3 54. Rd7) 51... Rd3+ $2 (51... Re4 52. e6 Kg8) 52. Kxf4 Rxa3 53. e6 {[%cal Be5e6,Be6e7][%mdl 32] White mates.} d4 54. Rd7 Re3 {[#]} 55. e7 $1 Kg8 56. h6 {[%cal Bh5h6,Bh6h7][%mdl 32]} Kf7 57. h7 Rh3 58. Rd8 {Precision: White = 70%, Black = 54%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Kovalyov, Anton"]
[Black "Barrientos, Sergio E"]
[Result "1/2-1/2"]
[ECO "A17"]
[WhiteElo "2643"]
[BlackElo "2463"]
[Annotator "TA"]
[PlyCount "38"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,38,16,13,18,17,21,20,16,-6,0,-27,-18,-45,-44,-48,-51,-56,-61,-88,-85,-81,-72,-110,-85,-95,-91,-102,-35]} 1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 4. Qc2 d6 5. g3 O-O 6. Bg2 e5 7. O-O {LiveBook: 4 Games} Bxc3 {A22: English Opening: 1...e5 2 Nc3 Nf6} 8. Qxc3 a5 $146 ({Predecessor:} 8... Re8 9. d3 Nc6 10. b4 Bg4 11. b5 Bxf3 12. exf3 {½-½ (35) Iturrizaga Bonelli,E (2625)-Pena Gomez,M (2462) Linares 2015}) 9. d3 Re8 {The position is equal.} 10. e4 c5 11. Nh4 Nc6 12. f4 Nd4 13. Kh1 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 14. b3 a4 $36 {[%mdl 2048] Black has good play.} 15. fxe5 b4 {Black is better.} ({Of course not} 15... Rxe5 $6 16. cxb5 Bg4 17. Bf4 $11) 16. Qb2 dxe5 17. Be3 Ra6 18. h3 Nh5 19. Kh2 a3 {Precision: White = 53%, Black = 70%.} (19... Be6 $17) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Cori, Jorge"]
[Black "Bachmann, Axel"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2618"]
[BlackElo "2653"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,101,40,36,39,36,41,33,38,46,55,46,53,0,4,3,19,9,64,17,14,0,0,0,29,0,3,0,0,0,25,22,13,14,11,8,30,30,56,56,56,56,62,62,62,62,62,62,62,62,62,52,52,52,52,52,52,52,62,52,69,0,0,-8,59,59,66,66,148,127,127,66,188,184,184,161,156,156,229,229,214,160,214,166,5057,5057,5057,4775]} 1. d4 Nf6 2. Nf3 e6 3. c4 Bb4+ 4. Bd2 a5 5. g3 d5 6. Qc2 O-O 7. Bg2 c5 {E11: Bogo-Indian} 8. cxd5 cxd4 9. Nxd4 {LiveBook: 40 Games} Qb6 {White is slightly better.} 10. e3 Nxd5 11. O-O Bd7 12. Nc3 Nf6 13. a3 $146 ({Predecessor:} 13. Rfc1 e5 14. Nf3 Re8 15. a3 Bxc3 16. Bxc3 {½-½ (25) Malaniuk,V (2523)-Ovsejevitsch,S (2561) Koszalin 2012}) 13... Be7 14. Qb3 (14. Na4 {looks sharper.} Qa6 15. Rfc1 Bc6 16. Bf1 Qa7 17. Nb5) 14... Qxb3 15. Nxb3 a4 16. Nd4 e5 (16... Nc6 $11) 17. Nc2 (17. Ndb5 {is interesting.} Nc6 18. Nc7 Rab8 19. N3d5 Rfc8 20. Rac1) 17... Nc6 18. Nd5 Nxd5 19. Bxd5 Na5 20. Rad1 Rfd8 21. Bc3 Bc6 22. Ba2 {[%cal Bd5a2,Ba2b1,Bb1e4][%mdl 32]} Rdc8 23. Nb4 $36 {[%mdl 2048] White has the initiative.} Bb5 24. Rfe1 Bc4 25. Bb1 Bxb4 26. Bxb4 Nc6 27. Bc3 Rd8 28. Be4 Bb3 29. Rxd8+ Rxd8 30. Bxc6 bxc6 31. Bxe5 Rd1 32. Rxd1 Bxd1 $14 {[%mdl 4096] Endgame KB-KB} 33. Kg2 f5 34. f3 Kf7 35. e4 fxe4 36. fxe4 g6 37. Kf2 c5 38. b4 ({White should try} 38. Bd6 $14) 38... axb3 $11 39. h3 b2 (39... h5 $11) 40. Bxb2 $14 h5 41. Ke3 Bc2 {[#]} (41... Ba4 $14) 42. Kf4 $1 $16 Ke6 {[#]} 43. Bc3 (43. Bg7 $1 $16) 43... Kd6 (43... Ba4 $14) 44. Bg7 Kc6 45. Ke5 Bd3 46. Bh6 Bf1 (46... Bc2 $16 47. h4 c4) 47. Kf6 $18 Bxh3 48. Kxg6 Bg2 (48... Bf1 $16 49. Kf6 (49. Kxh5 Bg2 $14) 49... Bb5) 49. e5 ({Stronger than} 49. Kxh5 Bxe4 50. a4 Bf3+ 51. Kh4 Bd1 $11) 49... Kd5 $2 (49... Kd7 50. Kf5 (50. Kxh5 Ke6 $14) 50... c4) 50. Kf6 Bh3 51. a4 {Precision: White = 66%, Black = 32%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Delgado Ramirez, Neuris"]
[Black "Cori Quispe, Kevin Joel"]
[Result "1-0"]
[ECO "B47"]
[WhiteElo "2613"]
[BlackElo "2390"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,85,19,6,20,13,14,7,8,0,0,0,0,0,0,0,22,18,39,29,67,70,84,73,81,66,74,76,75,68,80,78,171,154,452,443,433,210,206,105,263,120,180,173,154,189,161,81,393,433,514,158,152,150,160,0,0,0,159,166,406,0,0,0,385,366,302,325,833,730]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. f4 a6 7. Nxc6 bxc6 8. Bd3 d5 9. O-O Nf6 10. Qe2 Be7 {B46: Sicilian: Taimanov: 5 Nc3 a6} 11. Bd2 O-O 12. b3 (12. Rae1 g6 13. Kh1 Bb7 14. b3 Rfe8 15. e5 Nd7 16. Na4 c5 17. c4 d4 18. Be4 {½-½ (55) Quesada Perez,Y (2630)-Kacheishvili,G (2590) Saint Louis 2017}) 12... Re8 {The position is equal.} 13. Kh1 $146 ({Predecessor:} 13. e5 Nd7 14. Na4 Bb7 15. Rf3 g6 16. Rh3 c5 17. c4 d4 {1-0 (39) Lengyel,B (2385)-Fang,J (2315) Budapest 1998}) 13... Bb7 14. Rae1 Bf8 15. e5 Nd7 $1 16. Rf3 g6 17. h4 {[%cal Bh2h4,Bh4h5][%mdl 32]} c5 18. Rg3 (18. h5 $5) 18... Bg7 19. h5 Rec8 20. Qg4 {[%cal Rh5g6]} Nf8 21. Nd1 c4 22. bxc4 dxc4 23. Bf1 $40 {[%mdl 128] White has some attack.} Qc5 24. Bc3 Nd7 (24... Rc7 $16) 25. Ne3 Nb6 $2 (25... Be4 $16 {was necessary.}) 26. hxg6 $18 hxg6 27. Qh4 (27. f5 $142 Bxe5 28. fxe6) 27... Nd5 28. Ng4 (28. Nxd5 $18 Bxd5 29. Rh3) 28... Nxc3 $2 ({Don't play} 28... Nxf4 $6 29. Nf6+ Bxf6 30. exf6 $11) (28... Kf8 $16) 29. Rxc3 (29. f5 $1 $18) 29... Qd4 (29... Rd8 $16 {is a better defense.}) 30. Rh3 Kf8 31. Nf6 Rc5 32. Qg5 (32. c3 $18 Qd8 33. Nh7+ Kg8 34. Ng5 (34. Nf6+ Bxf6 35. Qxf6 Qxf6 $17)) 32... Qd8 $2 {[%mdl 8192]} (32... Qd2 $16 33. Qg3 Qd4) 33. Rh7 Rac8 34. Re3 $2 (34. Kh2 $18 {and the rest is easy.}) 34... Qd1 $16 35. Kg1 Qd4 36. Ng4 Qd8 $1 37. Nf6 {And now Reh3 would win.} Qd4 38. Kf2 $1 Ra5 $2 (38... Rb5) 39. Ng4 $2 (39. c3 $1 $18 {[%cal Rc3d4]} Rxa2+ 40. Be2) 39... Qd8 $11 {aiming for ...Qxg5.} (39... Rxa2 $2 40. Rxg7 Rxc2+ 41. Kg3 $18) 40. Nf6 Qd4 $2 {[%mdl 8192] [#]} ({But not} 40... Rxa2 41. Be2 $17) (40... Qd2+ $11 {and Black is okay.} 41. Be2 Rxa2) 41. c3 $1 $18 {[%cal Rc3d4]} Rxa2+ 42. Be2 Qd1 $2 {[#]} (42... Qd2) 43. f5 $1 {Precision: White = 41%, Black = 34%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Pichot, Alan"]
[Black "Torres, Juan Camilo"]
[Result "1/2-1/2"]
[ECO "C92"]
[WhiteElo "2577"]
[BlackElo "2275"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,105,40,38,33,52,26,31,31,51,18,17,11,10,8,25,0,23,15,33,0,27,10,10,-7,-12,-8,-13,-7,-3,-14,-24,-14,-14,-39,-45,-36,-45,-81,0,0,0,0,0,-16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nd7 10. d4 Bf6 11. a4 Bb7 12. d5 Ne7 13. axb5 axb5 14. Rxa8 Qxa8 15. Na3 {[%cal Bb1a3,Ba3c2,Bc2b4][%mdl 32]} Ba6 {LiveBook: 77 Games} 16. Ba2 {C92: Closed Ruy Lopez: 9...Be6, Karpov and Flohr-Zaitsev Variations} (16. Nh2 Ng6 17. Ng4 Be7 18. Ne3 Rb8 19. Nec2 Nc5 20. Nb4 Bc8 21. Nc6 Rb6 22. Bc2 Bd7 23. b4 Nb7 24. Be3 Rxc6 25. dxc6 Bxc6 {½-½ (78) Dominguez Perez,L (2726)-Svidler,P (2739) Tbilisi 2015}) 16... g6 $146 ({Predecessor:} 16... c5 17. dxc6 Qxc6 18. Nc2 Qc7 19. Nb4 Bb7 20. Nh2 Ng6 21. Ng4 Be7 22. Bd5 Nb6 23. Bxb7 Qxb7 {1-0 (48) Magem Badals,J (2484)-Poyato Sala,J (2174) Banyoles 2003}) 17. Bh6 Bg7 18. Qd2 {White is slightly better.} f6 19. Nc2 Bc8 {[#] aiming for ...Bxh6.} 20. Nb4 Nc5 21. Bb1 {[%cal Ba2b1,Bb1c2,Bc2b3][%mdl 32]} Bd7 (21... Nb3 $5 {[%cal Rb3d2]} 22. Qe3 Nc5 $14) 22. Bc2 Qb7 (22... g5 $5 {[%cal Rg7h6]} 23. Bxg7 Kxg7 $14) 23. Be3 Na6 24. Bb3 (24. Ra1 $5 {[%cal Ra1a6]} Nxb4 25. cxb4 $11) 24... Kh8 25. Ra1 Ra8 26. Ne1 Nxb4 27. Rxa8+ Qxa8 28. cxb4 f5 {Hoping for ...f4.} 29. f3 (29. Qc3 $5 {[%cal Rc3c7]} Qc8 30. f3 $11 (30. Bg5 Ng8 $11)) 29... Ng8 30. exf5 Bxf5 31. Nd3 Bxd3 32. Qxd3 Qa1+ 33. Bd1 e4 (33... Bh6 $17 {...Bxe3+ is the strong threat.} 34. Bxh6 Nxh6) 34. fxe4 $11 {The position is equal.} Bxb2 35. Kf2 Bc3 36. Kf3 Be5 37. Be2 Qe1 {[%csl Ge5][%cal Re1g3] [#]} 38. Bf2 Qxb4 39. Qxb5 Qc3+ 40. Qd3 Qc1 {[%csl Ge5][%cal Rc1f4]} 41. Qe3 Qc2 42. g3 {[%cal Bg2g3,Bg3g4,Bg4g5][%mdl 32]} c5 43. dxc6 Qxc6 44. Kg2 Nf6 45. Bf3 Kg7 46. g4 Qc7 47. h4 Qd7 48. Qe2 Qf7 49. Be3 h5 50. g5 Nd7 51. Qc2 Nc5 52. Be2 Ne6 53. Qd2 {Precision: White = 63%, Black = 65%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Peralta, Fernando"]
[Black "Pulvett Marin, Daniel"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2569"]
[BlackElo "2437"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,91,11,18,36,35,36,36,57,54,42,39,42,47,69,27,43,42,50,53,46,52,59,32,38,23,51,47,72,46,58,39,63,55,56,42,51,47,39,37,34,31,29,31,21,17,22,19,18,27,36,35,42,43,33,27,24,22,28,0,8,0,1,0,9,5,9,9,13,10,10,0,6,0,32,36,36,40,38,8,8,8,7,6]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 O-O 5. a3 Be7 6. e4 d6 {E11: Bogo-Indian} 7. Be2 Nbd7 8. Qc2 (8. O-O e5 9. b4 exd4 10. Nxd4 Re8 11. f3 a5 12. N2b3 axb4 13. axb4 Rxa1 14. Nxa1 {½-½ (59) Rodshtein,M (2698)-Bachmann,A (2646) Chartres 2017}) 8... e5 {White is slightly better.} 9. Nb1 c6 10. O-O Re8 11. Nc3 Bf8 12. Rd1 exd4 13. Nxd4 Nc5 {[%cal Rc5e4]} 14. f3 a5 15. b3 $146 ({Predecessor:} 15. Be3 Qc7 16. b4 axb4 17. axb4 Rxa1 18. Rxa1 Na6 19. b5 Nb4 {½-½ (59) Slipak,S (2415)-Dolezal,C Buenos Aires 1991}) 15... g6 16. Rb1 Nh5 17. Be3 Qh4 18. Qd2 Bg7 {[#] And now ...Be5 would win.} 19. Bf2 (19. Bf1 {seems wilder.} Qe7 20. Bf2 Bf6 21. g3 Bg5 22. Qc2) 19... Qf6 20. Bf1 Rd8 21. Nde2 Be6 22. Bd4 Qe7 23. Bxg7 Nxg7 24. b4 axb4 25. axb4 Na4 26. Nxa4 Rxa4 27. Nc3 Raa8 28. Ra1 Rxa1 29. Rxa1 Ne8 30. Qd4 Qf6 31. Qxf6 Nxf6 32. Ra7 Rb8 33. Kf2 Nd7 34. Nb1 Kf8 35. Nd2 Ke8 36. Be2 Nb6 37. f4 Kd8 38. g4 f6 39. h4 Kc7 40. Ra5 Re8 41. Ra3 Bf7 42. g5 h6 43. gxf6 {Hoping for h5.} Nd7 44. Bf3 Nxf6 45. Ra1 g5 46. hxg5 {Precision: White = 70%, Black = 57%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Cruz, Cristhian"]
[Black "Panesso Rivera, Henry"]
[Result "1-0"]
[ECO "E73"]
[WhiteElo "2558"]
[BlackElo "2421"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,60,-42,-38,-93,-84,-87,-79,-79,-14,-40,-50,-58,3,0,0,-23,-20,-18,0,0,0,0,45,10,27,24,32,27,17,1,58,56,53,51,72,46,72,49,49,47,50,28,74,67,58,51,285,279,602]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Be3 c5 7. Nf3 Ng4 $1 8. Bc1 {[#] E90: King's Indian: Classical: Early deviations and 6 h3} (8. h3 $15 Nxe3 9. fxe3) (8. O-O Nxe3 9. fxe3 Nc6 10. Qd2 Qa5 11. Rad1 a6 12. a3 Bg4 13. h3 Bxf3 14. Bxf3 cxd4 15. exd4 Bxd4+ {0-1 (38) Kajevic,D (2124)-Damljanovic,B (2539) Bihac 2010}) 8... cxd4 $1 $17 9. Nxd4 Qb6 10. Bxg4 {Black is better.} Qxd4 (10... Bxg4 $17 11. Qxg4 Qxd4) 11. Qxd4 (11. Be2 {looks sharper.} Qxd1+ 12. Nxd1 Nc6 13. Ne3 Be6 14. Rb1) 11... Bxd4 12. Nb5 {Hoping for Bxc8.} Bxg4 $146 (12... Bg7 $15 13. Be2 Nc6) ({Predecessor:} 12... Nc6 13. Nxd4 Nxd4 14. Bd1 f5 15. Be3 Nc6 16. exf5 Bxf5 {½-½ (48) Zesiger,H (2101)-Vucenovic,D (2272) Silvaplana 2003}) 13. Nxd4 $11 Nc6 14. Nc2 Be6 15. b3 f5 16. exf5 Bxf5 17. Ne3 Nd4 18. Kd2 (18. Bb2 $5 {[%cal Rb2d4]} Nc2+ 19. Nxc2 Bxc2 20. O-O $14) 18... Be4 (18... Bd7 $5 {[%cal Rf8f2]}) 19. f3 Bc6 20. Re1 (20. Bb2 $5 {[%cal Rb2d4]} Nf5 21. Rhe1 $11) 20... e5 21. Bb2 (21. Ba3 {is more complex.} Rad8 22. Red1 h5 23. Bb4 h4 24. h3) 21... Ne6 (21... Bxf3 $11 22. Bxd4 exd4 23. gxf3 dxe3+ 24. Rxe3 Rf5) 22. Rad1 $14 Rad8 23. Kc1 Rd7 24. Rd2 h5 25. Red1 Rfd8 26. Nd5 {And now Nf6+ would win.} Kf7 27. Ba3 Nd4 {[#]} 28. Nb4 $1 Nf5 29. Nd3 b6 $2 {[#]} ({Black should play} 29... Kf6 $14) 30. Bxd6 $1 $18 {[%mdl 512]} Ra8 $2 {Precision: White = 41%, Black = 28%.} (30... Rxd6 31. Nxe5+ Kf6 32. Nxc6 Rxd2 33. Rxd2 Rxd2 34. Kxd2 a5) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Bacallao Alonso, Yusnel"]
[Black "Sevian, Samuel"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "2554"]
[BlackElo "2601"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,76,0,16,0,0,-12,1,-10,0,0,12,-6,-6,-18,-27,-18,-14,-11,-16,-25,-16,-7,0,0,0,0,0,0,0,0,-2,-27,0,0,0,0,0,0,0,0,0,0,0,-19,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Qc2 Bd6 7. Bd3 O-O 8. O-O dxc4 9. Bxc4 b5 10. Bd3 Bb7 11. a3 Rc8 12. b4 {D46: Semi-Slav: 5 e3 Nbd7 6 Bd3, Black avoids the Meran} a5 13. Qb3 e5 14. Ne4 Nxe4 15. Bxe4 g6 16. dxe5 (16. Bb2 $5 {[%cal Rd4e5]} exd4 17. Rad1 $11 (17. Nxd4 Bxh2+ 18. Kxh2 Qh4+ 19. Kg1 Qxe4 $11) (17. Bxd4 Qe7 $15)) 16... Nxe5 17. Nxe5 Bxe5 18. Bb2 a4 19. Qc2 Bxb2 20. Qxb2 {[#]} Qe7 $146 21. Qc2 Rfe8 22. Bf3 c5 {[#] aiming for ...Bxf3.} 23. Bxb7 Qxb7 24. bxc5 Re5 25. Rfc1 Qc6 {[%cal Re5c5]} 26. Rab1 Rxc5 (26... Rg5 {is more complex.} 27. g3 Rxc5 28. Qxc5 Qxc5 29. Rxc5 Rxc5 30. Kg2 Kf8) 27. Qxc5 {The position is equal.} Qxc5 28. Rxc5 Rxc5 $11 {[%mdl 4096] Endgame KR-KR} 29. Kf1 Kg7 30. Ke2 Rc3 31. Rxb5 Rxa3 32. Ra5 h5 33. h4 Ra2+ 34. Kf3 a3 35. Ra6 f5 36. g3 Kf7 37. Ra4 Kg7 38. Ra6 Kf7 {Precision: White = 59%, Black = 67%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Ramirez, Alejandro"]
[Black "Duran Vega, Sergio"]
[Result "1-0"]
[ECO "A06"]
[WhiteElo "2552"]
[BlackElo "2408"]
[Annotator "TA"]
[PlyCount "49"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,49,-32,-40,-31,-16,-23,-22,-22,17,-35,-35,-66,46,64,123,127,132,135,114,85,89,86,97,89,96,99,104,91,117,95,210,207,276,272,290,323,448,439,445,440,454,464]} 1. Nf3 d5 2. b3 e6 3. c4 d4 4. e3 Nc6 5. g3 $146 ({Predecessor:} 5. Bb2 e5 6. exd4 exd4 7. d3 Nf6 8. Be2 Be7 9. O-O O-O 10. Na3 Re8 11. Nc2 Bc5 {1-0 (42) Malakhov,V (2717)-Oparin,G (2526) Riga 2014}) 5... e5 6. Bg2 {A13: English Opening: 1...e6} dxe3 7. dxe3 Qxd1+ 8. Kxd1 {The position is equal.} Bf5 9. Bb2 (9. Ke2 $1 $11) 9... O-O-O+ $15 10. Kc1 Nb4 (10... Nf6 $15) 11. Nxe5 $14 f6 ({Black should play} 11... Nh6 $14) 12. a3 $16 Na6 {[%cal Bb4a6,Ba6c5,Bc5b3][%mdl 32] [#] White must now prevent ...Nc5.} 13. Nf7 $36 {[%mdl 2048] Threatens to win with Bxb7+! White has strong initiative.} Nc5 {[%cal Rc5b3]} 14. Bd4 Nxb3+ 15. Kb2 Rd7 16. Nxh8 Nxa1 17. Kxa1 Nh6 18. h3 Be6 19. g4 {Strongly threatening Be4.} Bd6 (19... Be7 $16) 20. Be4 $18 {c5 is the strong threat.} ({Inferior is} 20. Bxa7 Be5+ 21. Bd4 Rxd4 $11) 20... f5 21. Bc2 fxg4 22. c5 ({Less strong is} 22. Bxh7 g5 $16) 22... Bf8 23. hxg4 {White is clearly winning.} Bxg4 24. Bxh7 Nf5 25. Ng6 {Precision: White = 72%, Black = 37%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Morovic Fernandez, Ivan"]
[Black "Ynojosa Aponte, Felix Jose"]
[Result "0-1"]
[ECO "A30"]
[WhiteElo "2537"]
[BlackElo "2395"]
[Annotator "TA"]
[PlyCount "108"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,108,6,9,-19,-11,0,-15,-32,6,11,22,0,0,0,0,0,0,-29,-38,-37,-6,-60,-55,-73,-43,-16,-16,-116,-117,-124,-116,-143,-118,-122,-111,-93,-96,-115,0,-3,0,0,0,0,0,0,0,-12,-6,-12,-14,-16,-12,-315,-320,-364,-350,-358,-357,-341,-304,-793,-793,-759,-753,-684,-456,-456,-456,-456,-443,-373,-371,-324,-310,-310,-304,-289,-229,-498,-493,-651,-615,-565,-552,-497,-406,-1641,-710,-1260,-1184]} 1. c4 c5 2. Nf3 Nc6 3. Nc3 e5 4. g3 Nf6 5. Bg2 Be7 6. O-O d6 7. d3 {A34: Symmetrical English: 2 Nc3, lines with ...d5} h6 8. a3 O-O 9. Rb1 a5 (9... Be6 10. b4 Qd7 11. Re1 b6 12. e3 e4 13. dxe4 Bxc4 14. bxc5 bxc5 15. e5 Ng4 16. Qa4 Ncxe5 17. Nxe5 Qxa4 18. Nxa4 Nxe5 19. Bxa8 Rxa8 {0-1 (50) Barbosa,O (2518)-Li,C (2720) chess.com INT 2017}) 10. Ne1 Be6 {LiveBook: 7 Games} 11. Nc2 d5 12. cxd5 Nxd5 13. Ne3 Nb6 14. b3 Rb8 {[#]} 15. Nc4 $146 ({Predecessor:} 15. Bd2 Bg5 16. f4 exf4 17. gxf4 {½-½ (55) Bindrich,F (2522)-Volodin,A (2422) Chotowa 2010}) 15... Nd5 16. Nxd5 Bxd5 17. Bh3 f6 18. Ne3 Bf7 $1 19. Nf5 Nd4 {[%cal Bc6d4,Bd4e6,Be6g5][%mdl 32]} (19... Re8 {keeps more tension.} 20. Bd2 Bf8 21. Ne3 b5 22. Re1 Nd4) 20. Nxe7+ (20. Bd2 $11) 20... Qxe7 $15 21. Bd2 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 22. e3 Ne6 23. f4 (23. Bxa5 $11 {keeps the balance.} b4 24. Ra1) 23... b4 $1 $17 24. fxe5 fxe5 25. Bf5 g6 26. Be4 Ng5 27. Bg2 Be6 28. axb4 axb4 ({Black should play} 28... cxb4 $17 29. e4 Qa7+ 30. Kh1 Nh3 31. Bxh3 Bxh3) 29. e4 $11 Rxf1+ 30. Qxf1 Bf7 31. h4 Ne6 32. Bxh6 Nd4 33. Bg5 Qd6 34. Rb2 Bxb3 35. Rf2 $1 {[%cal Rf2f6] Hoping for Rf6.} Rf8 $36 {[%mdl 2048] Black has good play.} 36. Bf6 $2 {[%mdl 8192]} (36. Rxf8+ $11 Qxf8 37. Qa1) 36... Bc2 $1 $19 37. Bg5 {[#]} Rxf2 $1 38. Kxf2 b3 39. Bc1 Qb6 {aiming for ...c4.} 40. Bb2 $2 {[#]} (40. Kg1) 40... c4 $1 {[%mdl 512]} 41. dxc4 Nf5+ $1 42. Ke1 Ne3 43. Qe2 Qa5+ 44. Qd2 Nxg2+ 45. Ke2 {[#]} Qxd2+ $1 46. Kxd2 Kf7 (46... Bxe4 47. Bxe5 Kf7 48. Bd4 $19) 47. Bxe5 Ke6 ({Don't play} 47... Bxe4 48. Kc3 $19) 48. Bd4 Bxe4 49. Kc3 $2 (49. Bh8) 49... Bc2 50. Bf2 Kf5 51. c5 Kg4 52. c6 Kf3 53. c7 (53. Bc5 $142 Kxg3 54. c7) 53... Bf5 54. Bc5 Be6 {Precision: White = 37%, Black = 84%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Rios, Cristhian Camilo"]
[Black "Ortiz Suarez, Isan Reynaldo"]
[Result "0-1"]
[ECO "D44"]
[WhiteElo "2499"]
[BlackElo "2570"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,76,-22,0,-8,-19,-9,0,-72,0,0,0,-50,-45,-72,-43,-40,-23,-52,0,6,10,21,22,27,21,-68,1,14,0,0,0,-69,-76,-119,-122,-117,-51,-106,-125,-194,-207,-267,-265,-268,-268,-260,-261,-275,-250,-435,-402,-419,-437,-485,-418,-452,-446,-435,-428]} 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 dxc4 6. e4 {[%cal Be2e4,Be4e5][%mdl 32]} b5 7. e5 h6 8. Bh4 g5 9. Bg3 Nd5 10. Nd2 Bb7 {LiveBook: 27 Games. D44: Semi-Slav: Botvinnik System} 11. h4 g4 $146 ({Predecessor:} 11... Nxc3 12. bxc3 c5 13. Qb1 Qa5 14. Bxc4 Bc6 15. d5 exd5 16. Be2 Bg7 17. Qc2 Nd7 18. e6 {1-0 (38) Gormally,D (2520)-Thompson,I (2281) England 2011}) 12. Qxg4 Nd7 {The position is equal.} 13. h5 {[#]} (13. Nxd5 $11 {keeps the balance.} cxd5 14. Be2) 13... Qa5 (13... Nxc3 $1 $17 14. bxc3 Qa5) 14. Nxd5 $1 $11 cxd5 15. Qd1 Qb6 16. Rh4 Be7 17. Rg4 O-O-O 18. a4 Rhg8 ({Better is} 18... bxa4 $15 19. Qc2 Rhg8) 19. a5 Qc7 20. Rxg8 Rxg8 21. Qf3 f5 22. Bf4 (22. exf6 $1 $11 Bd6 23. Ra3) 22... Bg5 (22... Nb8 $15) 23. Bxg5 Rxg5 24. Qa3 Kd8 $36 {[%mdl 2048] Black has the initiative.} 25. f4 (25. Nf3 $11 Rxh5 26. Kd2) 25... Rg8 $15 26. a6 Bc6 27. Nf3 Nb8 (27... Nb6 $17 28. Nh4 Nc8) 28. Nh4 {[#]} (28. b3 $15) 28... Be8 $1 $17 29. Be2 (29. Ng6 $17 {was worth a try.}) 29... Nc6 $19 30. Qc5 Qe7 31. Qxe7+ Kxe7 32. Rd1 b4 {[%cal Bb5b4,Bb4b3][%mdl 32]} 33. Kf2 b3 34. g4 $2 (34. g3 {is a better defense.}) 34... fxg4 35. f5 {intending Ng6+.} Bxh5 36. f6+ Kd7 37. Ke3 Bf7 38. Ng2 h5 {Precision: White = 44%, Black = 44%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Arenas, David"]
[Black "Flores, Diego"]
[Result "0-1"]
[ECO "B07"]
[WhiteElo "2488"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,88,0,-7,58,16,25,16,70,47,52,20,81,69,101,84,91,67,64,61,108,81,73,67,75,52,40,33,68,-28,-28,-28,-24,-33,-30,-54,-59,-237,-229,-362,-359,-370,-372,-371,-360,-362,-370,-445,-454,-489,-484,-456,-373,-469,-476,-488,-472,-551,-543,-599,-579,-632,-626,-681,-669,-857,-837,-844,-837,-1343,-1263,-1516,-1516,-1393,-1376,-1342,-1443]} 1. e4 {[%cal Be2e4,Be4e5][%mdl 32]} d6 2. d4 Nf6 3. Nc3 c6 {[%cal Bc7c6,Bc6c5][%mdl 32]} 4. f4 Qa5 5. e5 Ne4 6. Bd3 Nxc3 7. Qd2 c5 {B07: Pirc Defence: Miscellaneous Systems} (7... g6 8. bxc3 Bh6 9. Nf3 dxe5 10. Nxe5 Nd7 11. Nc4 Qc7 12. O-O b5 13. Ne5 Nxe5 14. dxe5 O-O 15. Qf2 Bg7 {½-½ (65) Supi,L (2416)-Felgaer,R (2582) Montevideo 2015}) 8. bxc3 {LiveBook: 5 Games} dxe5 ({Black should try} 8... d5 $11) 9. dxe5 $146 ({Predecessor:} 9. fxe5 Nc6 10. Nf3 cxd4 11. cxd4 Qxd2+ 12. Bxd2 e6 13. O-O h6 14. c4 Bd7 15. Rab1 {1-0 (30) Ahmad,A (2345)-Amjad,A (2252) Baghdad 2010}) 9... e6 {The position is equal.} 10. Ne2 Nd7 (10... Be7 $11) 11. O-O $14 Be7 12. Kh1 Qc7 (12... Nb6 $11 {keeps the balance.}) 13. c4 $16 b6 14. Nc3 Bb7 15. a4 O-O 16. Qe3 Rfd8 17. Qh3 Nf8 {[%cal Bd7f8,Bf8g6,Bg6h4][%mdl 32]} 18. Bb2 Ng6 19. Rae1 Nh4 20. Re2 Rd7 21. f5 {[#]} (21. Kg1 $14) 21... Rxd3 $1 $11 {[%mdl 512]} 22. cxd3 Nxf5 23. Nd5 Qd8 $1 24. Rxf5 exf5 25. e6 $2 (25. Nxe7+ $15 Qxe7 26. Qxf5) 25... Bxd5 $19 26. Qg3 (26. cxd5 $142 Qxd5 27. Re5) 26... f6 27. cxd5 Qxd5 28. Re1 Bd6 29. Qh4 {Now Bxf6! and White clings on.} Re8 (29... Qxd3 $2 {[#]} 30. Bxf6 $1 {[%mdl 512]} gxf6 31. Qxf6 $19) 30. Bxf6 Rxe6 ({Don't play} 30... gxf6 31. Qxf6 Qb7 32. Qg5+ Qg7 33. Qxf5 $19) 31. Bc3 {Hoping for Qd8+.} Rxe1+ 32. Qxe1 Kf7 33. Qe2 g6 {Black is clearly winning.} 34. Kg1 Qb3 35. Bb2 Qxa4 36. Qf3 Qb3 37. Bc1 Be7 38. h3 a5 {[%cal Ba7a5,Ba5a4,Ba4a3][%mdl 32]} 39. Bf4 a4 40. Qa8 Qxd3 41. Kh2 Qd4 42. Qb8 a3 43. Be5 Qd8 44. Qa7 Ke6 {Precision: White = 31%, Black = 51%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Quintiliano Pinto, Renato R"]
[Black "Shabalov, Alexander"]
[Result "0-1"]
[ECO "A58"]
[WhiteElo "2483"]
[BlackElo "2556"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,120,20,58,62,50,49,54,29,50,43,46,5,6,14,46,-14,9,-33,19,-41,-27,-38,-37,-25,-28,-41,-27,-47,-39,-31,-29,-41,-16,-62,-53,-48,-56,-67,-35,-70,-51,-97,-97,-103,-99,-107,-103,-104,-69,-77,-65,-97,-70,-77,-64,-97,-87,-101,-85,-87,-83,-97,-94,-97,-89,-89,-83,-100,-104,-103,-95,-116,-101,-181,-176,-164,-171,-169,-122,-118,-118,-119,-119,-118,-118,-141,-130,-137,-127,-143,-69,-74,-68,-97,-70,-91,-74,-80,-78,-85,-66,-64,-65,-60,-60,-104,-65,-271,-266,-793,-737,-802,-719]} 1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 {A58: Benko/Volga Gambit: Lines with 5 bxa6} Bg7 (6... Bxa6 7. Nf3 Bg7 8. e4 Bxf1 9. Kxf1 d6 10. g3 O-O 11. Kg2 Na6 12. Qe2 Qb6 13. Rd1 Qb7 14. Rb1 Nd7 15. Bg5 Rfe8 16. a3 Nc7 17. Qc2 Nb6 18. a4 Rac8 19. b3 e6 20. dxe6 Nxe6 {1-0 (27) Jakovenko,D (2714)-Zvjaginsev,V (2673) Moscow 2016}) 7. e4 O-O 8. Nf3 {White is slightly better.} Qa5 {With the idea ...Nxe4.} 9. Bd2 Bxa6 10. Bxa6 Qxa6 11. Qe2 d6 12. Rb1 (12. a4 $14) 12... Nfd7 13. b3 $146 ({Predecessor:} 13. Qxa6 Nxa6 {0-1 (58) Sirosh,I (2314)-Meskovs,N (2451) Viljandi 2015}) 13... f5 (13... Qxe2+ $15 14. Kxe2 f5) 14. a4 (14. Qe3 $1 $11) 14... Bxc3 $15 15. Bxc3 Qxe2+ 16. Kxe2 fxe4 17. Ng5 Nb6 18. Rhd1 Rf5 19. Nxe4 Nxd5 20. Ba1 Nc6 21. Ng3 Nf4+ 22. Kf1 $1 Rff8 $36 {[%mdl 2048] Black has the initiative.} 23. Ne4 Ne6 24. Nc3 Nc7 25. Nb5 Nxb5 26. axb5 Nb4 27. Bc3 Nc2 {[#] White must now prevent ...Ne3+.} 28. Rd3 Rab8 29. Rc1 Na3 30. Re3 Rf7 ({Don't play} 30... Nxb5 31. Rxe7 Rf7 32. Re3 $11) 31. b4 Rxb5 {Hoping for ...Nc4.} 32. bxc5 Rxc5 33. Rd1 Nb5 34. Be1 Nc7 35. Red3 Rff5 36. Ra1 Nd5 37. Bd2 Nf6 38. Be1 Kf7 39. h3 h5 40. Bd2 Ne4 41. Be3 (41. Be1 $17) 41... Rc2 $19 {[%cal Re4f2]} 42. f3 Ng3+ 43. Kg1 Ne2+ 44. Kh2 Rb5 45. h4 Rb4 {[%cal Rb4h4]} 46. Kh3 Rcc4 {[%csl Gb4][%cal Rc4h4]} 47. g3 Rc2 48. Bg5 Nd4 {...Rbb2 is the strong threat.} 49. Ra7 {[#]} Re2 (49... Nc6 $1 $17 {[%cal Rc6a7]} 50. Rc7 Rbb2) 50. g4 $15 Re5 51. Bf4 Re6 (51... Nb5 {feels hotter.} 52. Bxe5 Nxa7 53. Bg3 Ke6 54. Rc3 Nb5) 52. Bd2 Rc4 53. gxh5 gxh5 54. Ra5 Rf6 55. Rxh5 Nxf3 56. Rh7+ Ke6 57. Bc3 Rff4 {[%cal Rf3h4]} 58. Kg3 $2 (58. Re3+ $15 Rce4 59. Rxe4+ Rxe4 60. Ba5) 58... Nxh4 $19 59. Re3+ $2 (59. Rh6+ Kd7 60. Rh5) 59... Kd5 {Threatens to win with ...Nf5+.} 60. Rh5+ Nf5+ {Precision: White = 33%, Black = 58%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Tang, Andrew"]
[Black "Fier, Alexandr"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "2461"]
[BlackElo "2576"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,78,17,14,10,20,7,22,-9,-2,-9,0,-12,-11,-3,93,102,129,127,193,27,49,32,61,19,22,20,47,37,58,27,30,11,16,17,23,0,18,22,34,33,50,42,34,40,51,36,70,53,43,39,177,162,189,177,210,212,211,206,147,135,662,677,788,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Bf4 c5 3. e3 Nd5 (3... g6 4. c3 Qb6 5. Qb3 Bg7 6. Nd2 O-O 7. Nc4 Qd8 8. Nf3 cxd4 9. exd4 Nc6 10. Be2 d6 11. Rd1 {1-0 (36) Kamsky,G (2661)-Sokolov,I (2632) Stockholm 2017}) 4. Bg3 Qb6 5. b3 cxd4 6. exd4 {A45: Trompowsky Attack} g6 7. Nf3 Bh6 8. c3 $146 (8. c4 $5 {[%cal Rc4d5]} Nf6 9. Bd3 $14) ({Predecessor:} 8. Bc4 Qb4+ 9. Kf1 Qa5 10. c3 Nf4 11. Ne5 {1-0 (37) Tran,M (2293)-Tabatabaei,M (2493) Khanty-Mansiysk 2016}) 8... Nf4 9. Ne5 d6 10. Ng4 Bxg4 $1 11. Qxg4 {Black must now prevent Qc8+.} Ne6 (11... f5 $11 12. Qh4 Nh5) 12. Bc4 $1 $16 Nd8 13. O-O e6 (13... Nbc6 $16 {keeps fighting.} 14. Qh4 Bg7) 14. Bf4 $2 (14. Na3 $18) 14... Bxf4 15. Qxf4 Nd7 16. Nd2 d5 17. Bd3 Nc6 18. Rfe1 Qd8 19. Nf3 O-O 20. Re3 Kg7 21. Rae1 Rc8 22. Bb1 Qf6 (22... Qc7 $5 {[%cal Rc7f4]} 23. Qh4 Qd8 $11) 23. Qg3 h6 24. h4 $36 {[%cal Bh2h4,Bh4h5][%mdl 2080] White fights for an advantage.} b5 25. Nh2 Kh8 26. h5 {[%cal Rh5g6]} g5 27. Ng4 Qg7 28. f4 {[%cal Bf2f4,Bf4f5,Bf5e6,Be6f7][%mdl 32] aiming for f5.} b4 {Strongly threatening ...bxc3.} 29. f5 bxc3 ({Better is} 29... Nf6 $1 $14) 30. fxe6 $18 Nf6 31. exf7 $1 (31. Rxc3 fxe6 32. Rxe6 Nxg4 $11) 31... Nxd4 {...c2 is the strong threat.} 32. Nxf6 Qxf6 33. Rf1 Qg7 {With the idea ...c2.} 34. Qd6 $1 c2 $2 {[%mdl 8192] [#]} (34... g4 $16 35. Bg6 c2) 35. Bxc2 $1 {[%mdl 512]} Nxc2 {[#]} (35... Rxc2 36. Re8) 36. Re6 $2 ({White has to play} 36. Rf6 $1 $18 {[%cal Rf6h6][%mdl 512]} Rxf7 37. Rxf7 Qxf7 38. Re7 Qxe7 39. Qxe7) 36... Qd4+ $11 {The position is equal.} (36... Rxf7 $2 37. Rxh6+ Kg8 38. Rxf7 $18) 37. Rf2 (37. Kh1 $5 {[%cal Re6h6]} Qh4+ 38. Kg1 Qd4+ 39. Kh2 Qh4+ 40. Kg1 Qd4+ $11) 37... Qd1+ (37... Rxf7 $2 38. Rxh6+ Rh7 39. Rxh7+ Kxh7 40. Qd7+ Kh6 41. Qxc8 $18) 38. Rf1 Qd4+ 39. Rf2 Qd1+ {Precision: White = 60%, Black = 41%.} ({But not} 39... Rxf7 $2 40. Rxh6+ Rh7 41. Rxh7+ Kxh7 42. Qg6+ Kh8 43. Qh6+ Kg8 44. Qe6+ (44. Qxg5+ Qg7 $16) 44... Kg7 45. Qg6+ Kh8 46. Qh6+ Kg8 47. Qe6+ (47. Qxg5+ Qg7 $16) 47... Kg7 48. Qxc8 $18) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Gallego Alcaraz, Andres Felipe"]
[Black "Vasquez Schroeder, Rodrigo"]
[Result "0-1"]
[ECO "A61"]
[WhiteElo "2453"]
[BlackElo "2553"]
[Annotator "TA"]
[PlyCount "164"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,164,52,63,20,30,30,30,33,13,8,15,14,20,14,32,32,33,33,31,0,20,0,8,0,0,0,0,0,8,8,10,0,10,14,17,14,11,19,30,0,49,59,42,33,52,57,89,84,80,73,46,0,0,0,32,0,0,0,27,0,0,0,0,0,0,0,0,0,6,0,19,12,11,12,11,11,11,11,17,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-92,-118,-789,-306,-830,-818,-681,-581,-819,-746,-747,-716,-714,-438,-854,-850,-818,-745,-880,-1250,-2044,-2288,-3339,-2315,-29973,-29974,-29975,-29975,-29977,-29979,-29979,-29979,-29984,-29985]} 1. d4 Nf6 2. c4 e6 3. Nf3 c5 4. d5 d6 5. Nc3 exd5 6. cxd5 g6 7. Bf4 a6 8. a4 Bg7 9. h3 O-O 10. e3 Ne8 {A61: Modern Benoni: Nf3 without early e4} 11. Be2 Nd7 12. O-O Rb8 13. Nd2 Qe7 14. a5 Ne5 {LiveBook: 19 Games} 15. Na4 Bd7 16. Nb6 Bb5 17. Bxe5 Bxe5 {[#]} 18. Ndc4 $146 Bg7 19. Rb1 Nf6 20. Na3 Bxe2 21. Qxe2 Ne4 22. Nac4 f5 23. Rfe1 Rbe8 24. Nd2 Ng5 25. f4 Ne4 26. Nbc4 Qd7 27. Kh2 Bf6 28. Nxe4 Rxe4 29. b3 Bc3 30. Rec1 Bb4 31. Qf3 Qd8 32. Ra1 {[%cal Bb1a1,Ba1a2,Ba2g2][%mdl 32]} Rfe8 33. Ra2 Rf8 34. g4 Re7 35. gxf5 Rxf5 36. Rg1 Ref7 {[#]} 37. Rg4 $1 Qf8 38. Rag2 Kh8 39. Qd1 Bc3 40. Qd3 Bg7 41. Rg5 R5f6 42. Nd2 Bh6 43. R5g3 Rf5 44. Nc4 {[%cal Bd2c4,Bc4b6,Bb6c8][%mdl 32]} R7f6 45. Qe4 Qf7 46. Rg5 Bf8 47. Nb6 Be7 48. Rxf5 Rxf5 49. Nc8 Bf8 50. Qe6 Kg7 51. Qxf7+ Kxf7 $11 {[%mdl 4096] Endgame KRB-KRN} 52. Nb6 Be7 53. Rf2 g5 54. Kg2 Kg6 55. e4 Rxf4 56. Rxf4 gxf4 {KB-KN} 57. Nc8 Bf8 58. Kf3 Kg5 {[#]} 59. h4+ $1 {[%mdl 512]} Kf6 (59... Kxh4 60. e5 $14) 60. Nb6 Bh6 61. Nc4 Ke7 62. e5 dxe5 63. Nxe5 Bg7 64. Nc4 h5 65. Kxf4 {Kg5 is the strong threat.} Bf6 66. Kg3 (66. Kf5 $1 $11 Bxh4 67. Kg6) 66... Kd7 $17 67. Kh3 $2 {[%mdl 8192]} (67. Kf2 $17) 67... Bc3 $19 68. Kg3 $2 (68. Kh2 Be1 69. Kg2) 68... Be1+ 69. Kh3 Ke7 70. Kg2 Bxh4 71. Kf3 Be1 72. Kf4 Kf6 73. Nd6 (73. Kf3 $142 Kf5 74. Ke2) 73... Bxa5 {( -> ...Bc7)} 74. Ne4+ Ke7 75. Nxc5 Bb4 76. Ne4 h4 77. Kg4 b5 {[%cal Bb7b5,Bb5a4][%mdl 32]} 78. Kxh4 a5 {Black mates.} 79. d6+ Ke6 80. Kg4 a4 81. bxa4 bxa4 82. d7 Kxd7 {Precision: White = 54%, Black = 73%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Zapata, Alonso"]
[Black "Mekhitarian, Krikor Sevag"]
[Result "1-0"]
[ECO "B88"]
[WhiteElo "2420"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,88,35,43,50,45,27,43,18,26,0,18,-22,7,-33,35,-25,-26,-88,-71,-225,-153,-139,0,0,0,0,0,0,0,0,0,0,25,15,72,59,62,65,86,52,59,32,57,55,57,29,288,269,295,258,624,618,595,575,569,547,792,722,29987,29988,29988,29989,29989,29990,29990,29991,29991,29992,29996,29997,29997]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 e6 7. Bb3 Be7 8. Be3 Bd7 9. Qe2 a6 10. O-O-O Na5 11. g4 {[%cal Bg2g4,Bg4g5][%mdl 32] B89: Sicilian: Velimirovic Attack} g6 (11... h5 12. h3 Nxb3+ 13. axb3 Qa5 14. Kb1 O-O-O 15. g5 Ne8 16. h4 g6 17. b4 Qxb4 18. Nb3 Bc6 {1-0 (89) Zsiltzova Lisenko,L (2276)-Draghici Flutur,G (2204) Calimanesti 2010}) 12. g5 Nh5 13. f4 {White is slightly better.} O-O $146 ({Predecessor:} 13... Nxb3+ 14. Nxb3 b5 15. Rhe1 b4 16. Nb1 Bb5 17. Qf2 O-O 18. Nd4 Bd7 {1-0 (37) Springer,G (1963)-Klemm,M Berlin 2007}) 14. Kb1 b5 15. e5 dxe5 16. fxe5 (16. Nf3 $5 {[%cal Rf3e5]} exf4 17. Ne5 fxe3 18. Nxd7 $11 (18. Rxd7 Qb6 $15)) 16... Nxb3 (16... Qb8 $15) 17. axb3 (17. Nxb3 $14 Qe8 18. Nc5) 17... Qc7 $11 18. Bc1 (18. Rhe1 $11) 18... Rfd8 19. Nf5 $2 (19. Rhe1 $17 {is a better defense.}) 19... gxf5 20. Qxh5 Qxe5 (20... Be8 $17 {White must now prevent ...b4.} 21. Bf4 b4 22. Rxd8 Rxd8) 21. Rhe1 Qg7 $1 {[#]} 22. Nd5 $1 {[%cal Rd5e7][%mdl 512]} exd5 23. Rxe7 Be6 24. Bf4 $36 {[%mdl 2048] White is more active.} d4 25. Qe2 Rd5 26. h4 {[%cal Bh2h4,Bh4h5][%mdl 32]} Rad8 (26... Qf8 $11 {keeps the balance.} 27. Rc7 Rc8) 27. Rd3 Qf8 28. Rc7 R5d7 29. Rxd7 Rxd7 30. h5 Qa8 31. Qe5 $1 {[%mdl 1024] Threatens to win with h6. White has compensation.} Rd5 $1 {[%cal Rd5e5]} 32. Qe1 Rd8 $2 {[%mdl 8192] [#]} (32... Rd7 $1 $11 {and Black stays safe.}) 33. g6 $1 $18 {[%mdl 512]} Qe4 (33... fxg6 34. Qxe6+) 34. Qh4 Rc8 $2 (34... Rd7 35. gxh7+ Kxh7) 35. gxh7+ Kxh7 36. Qg5 $1 {[%cal Rg5h6] White wants to mate with Qh6+.} Qe1+ {[#]} 37. Bc1 $1 Qf2 {[#]} 38. Ka2 $1 Rxc2 39. h6 {[%csl Gh6][%cal Rg5g7] White mates.} Qg2 40. Rg3 {[%csl Gg3][%cal Rg5g8]} Bxb3+ 41. Kxb3 {[%csl Gg3][%cal Rg5g8]} Rxb2+ 42. Bxb2 {[%csl Gg3,Gh6][%cal Rg5g7]} Qd5+ 43. Kc2 {[%csl Gg3,Gh6][%cal Rg5g7]} Qe4+ 44. Kd2 {[%csl Gg3,Gh6][%cal Rg5g7]} Qe3+ {Precision: White = 52%, Black = 40%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Prasca Sosa, Rafael Felipe"]
[Black "Erenburg, Sergey"]
[Result "0-1"]
[ECO "B18"]
[WhiteElo "2400"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,70,3,7,-12,-6,-25,-22,-44,0,0,-4,0,-11,-28,-20,-25,-2,-35,-33,-58,-59,-68,-69,-72,-51,-114,-107,-127,-110,-106,-105,-104,-110,-168,-115,-160,-165,-173,-154,-170,-143,-329,-314,-329,-295,-399,-304,-516,-504,-510,-498]} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. N1e2 Nf6 8. Nf4 Bh7 9. Bc4 e6 10. c3 Bd6 11. Ngh5 {B18: Classical Caro-Kann: 4...Bf5 sidelines} O-O {LiveBook: 9 Games} 12. Be3 (12. g4 e5 13. g5 exf4 14. gxf6 g6 15. Qf3 Kh8 16. Bxf4 gxh5 17. Bxh6 Re8+ 18. Kd2 Bg6 19. Rhg1 Kh7 20. Bxf7 Bxf7 21. Qf5+ Kh8 22. Rg7 {1-0 (22) Kuzubov,Y (2667)-Ezat,M (2479) Dubai 2015}) 12... Nbd7 13. Nxf6+ {The position is equal.} Nxf6 14. Nh5 $146 ({Predecessor:} 14. Qe2 a5 15. a4 Nd5 16. Nd3 Rb8 17. Ne5 Bxe5 18. dxe5 b5 19. axb5 cxb5 20. Bxd5 Qxd5 {0-1 (27) Gundogan,C (2072)-Kathmale,S (2339) Kocaeli 2013}) 14... Be4 15. Bd3 Bf5 ({Not} 15... Bxg2 $2 16. Rg1 $18) 16. Nxf6+ Qxf6 17. Qc2 a5 18. O-O-O a4 19. Bxf5 exf5 {[%cal Be6f5,Bf5f4][%mdl 32]} 20. Rh3 f4 21. Bd2 Rfe8 22. Qd3 Re7 23. Kb1 (23. a3 $15) 23... Rae8 $17 24. g4 fxg3 25. fxg3 Qe6 $36 {[%mdl 2048] Keeping White busy.} 26. Rhh1 Qg4 27. c4 (27. Rhg1 $17) 27... Qxg3 (27... Re4 $19 28. Bc1 Qxg3) 28. Qc2 Re2 29. Qxa4 Qd3+ 30. Qc2 Qxd4 {[#]} 31. Qc1 $2 (31. Bxh6 $1 $17 {[%mdl 512]} Qf2 (31... gxh6 32. Rxd4) 32. Qb3) 31... Be5 $19 32. Ka1 Qe4 33. Rhg1 Kh7 34. Bc3 $2 (34. h5) 34... Rc2 35. Qb1 {[#] Hoping for Rde1.} Bxc3 {Precision: White = 16%, Black = 67%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.14"]
[Round "7"]
[White "Chumpitaz, Ann"]
[Black "Vera Siguenas, Deivy"]
[Result "1/2-1/2"]
[ECO "E16"]
[WhiteElo "2163"]
[BlackElo "2526"]
[Annotator "TA"]
[PlyCount "127"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,127,0,8,4,12,4,10,6,27,33,23,26,22,28,36,28,41,43,42,41,52,46,47,20,37,30,53,0,53,-7,73,0,0,0,35,3,36,11,52,42,33,31,35,13,12,16,12,10,9,3,7,-25,0,0,0,-13,10,27,18,7,31,30,30,0,0,-115,-116,-179,-173,-275,-267,-276,-262,-250,-236,-256,-256,-234,-102,-105,-118,-117,-107,-87,-92,-179,-33,-49,-15,-26,0,0,0,0,0,-16,0,0,0,0,0,-4,-4,-4,-4,-4,-4,-4,-4,-4,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Qe7 5. Qc2 Bxd2+ {LiveBook: 82 Games} 6. Nfxd2 {E11: Bogo-Indian} (6. Nbxd2 Nc6 7. g3 d6 8. Bg2 e5 9. d5 Nb8 10. e4 O-O 11. O-O a5 12. Qc3 Nbd7 13. b3 c6 14. a3 Nc5 15. Rfe1 Bd7 16. Bf1 Bg4 17. Nh4 g5 18. Ng2 Bd7 19. b4 axb4 20. axb4 {½-½ (51) Ponkratov,P (2613)-Antipov,M (2529) Moscow 2015}) 6... d6 7. Nc3 O-O 8. e3 e5 9. d5 c6 10. Be2 $146 ({Predecessor:} 10. Bd3 Na6 11. a3 Bd7 12. Rc1 Nc5 13. O-O cxd5 14. cxd5 {½-½ (38) Magai,B-Ilinsky,V (2340) Frunze 1989}) 10... Na6 11. O-O Bd7 12. e4 Rac8 13. Qb3 Rb8 14. Qa3 c5 15. Nb5 Ra8 16. Rac1 Ne8 17. Qe3 Nac7 18. a3 (18. Nc3 $14) 18... a5 (18... Nxb5 $11 19. cxb5 f5) 19. h3 (19. Nc3 $14) 19... a4 {[#]} (19... Nxb5 $11 20. cxb5 a4) 20. b4 (20. Nc3 $1 $16) 20... axb3 21. Qxb3 Bc8 22. Rc2 g6 23. Ra2 Na6 {[%cal Bc7a6,Ba6b8,Bb8d7,Bd7f6][%mdl 32]} 24. Nc3 Nb8 25. Qc2 Ng7 26. Na4 Nd7 27. Rb1 Ra6 28. Nc3 f5 29. Bf3 Nf6 30. Rb5 g5 31. exf5 Nxf5 32. Ne2 Nh4 33. Ng3 Nxf3+ 34. Nxf3 g4 35. hxg4 Nxg4 36. Qd2 Rf4 {[%cal Bf8f4,Bf4c4,Bc4c1][%mdl 32]} 37. a4 (37. Qc1 $11) 37... Rxc4 $17 38. a5 e4 39. Qg5+ (39. Ne1 $142) 39... Qxg5 $19 40. Nxg5 e3 41. fxe3 Rc1+ ({Resist} 41... Nxe3 42. Rb1) 42. Nf1 Nxe3 43. Rf2 c4 (43... Nxd5 $19 {Threatens to win with ...Nc3.} 44. Re2 Kg7) 44. Ne6 {[%csl Ge6][%cal Rf2f8] [#]} Rxf1+ $1 45. Rxf1 Nxf1 46. Kxf1 $17 {[%mdl 4096] Endgame KRB-KRN} Kf7 47. Nf4 (47. Nd4 $17 {was worth a try.}) 47... Ke7 ({Black should try} 47... Kf6 $19 {White must now prevent ...Ke5.} 48. Rb4 Rxa5 49. Rxc4 Bf5) 48. Ke1 Kd8 49. Kd2 Kc7 50. Ne6+ {The position is equal.} Bxe6 51. dxe6 $11 {KR-KR} Ra8 52. Kc3 Kc6 53. Kxc4 Rg8 54. Rb6+ Kc7 55. e7 Re8 56. Kd5 $132 {[%mdl 2048] White has counterplay} Rxe7 {Strongly threatening ...Re5+.} 57. Rxd6 Rg7 {aiming for ...Rg5+.} 58. Rh6 Kb8 59. Kc5 Ka7 60. Kb5 Rg5+ 61. Kb4 Rg4+ 62. Kb5 Rg5+ 63. Kb4 $1 Rg4+ 64. Kb5 {Precision: White = 44%, Black = 48%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Bachmann, Axel"]
[Black "Delgado Ramirez, Neuris"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "2653"]
[BlackElo "2613"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,80,-3,4,7,33,23,27,16,34,20,15,12,22,24,24,22,18,14,18,18,21,15,16,10,19,21,20,0,12,27,30,24,23,25,34,37,46,18,11,0,0,0,0,0,0,0,0,-30,-22,-19,-21,-22,-14,-17,0,0,0,-14,-14,-11,-26,-14,-7,0,0,0,0,-15,-16,-18,-5]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d6 5. Nf3 O-O 6. Bd2 c5 7. dxc5 {E32: Nimzo-Indian: Classical (4 Qc2): 4...0-0} Bxc5 8. e3 Nc6 9. a3 {White has an edge.} a6 10. Bd3 h6 $146 ({Predecessor:} 10... d5 11. cxd5 exd5 12. Ne2 Bb6 13. O-O Bg4 14. Ned4 Rc8 {0-1 (30) Kavutskiy,K (2367)-Moradiabadi,E (2594) Las Vegas 2016}) 11. O-O e5 12. Rfd1 Be6 13. Bc1 {[%cal Bd2c1,Bc1b2,Bb2c3][%mdl 32]} Rc8 14. b3 Ba7 15. Bb2 Na5 16. Ne4 Nxe4 17. Bxe4 {Strongly threatening Bxe5!} Qc7 18. Bc3 Nc6 19. Rd2 f5 20. Bxc6 $1 bxc6 21. c5 Bxc5 {[#]} 22. Bxe5 $1 {[%mdl 512]} dxe5 23. Qxc5 Bd5 24. b4 (24. Rc1 $5 {[%cal Rd2d5]} Rfd8 25. b4 $14) 24... f4 25. Ne1 (25. e4 $5 Bxe4 26. Nxe5 $14) 25... Qf7 26. exf4 exf4 27. f3 Rce8 28. Nd3 Re3 29. Qd4 Qe7 30. Rf1 Qg5 31. Kh1 Rf5 32. a4 Qh4 (32... Bf7 $5 {[%cal Rf5d5]} 33. Nc5 Rd5 $11) 33. Kg1 Qg5 34. b5 (34. Nc5 {is more complex.} Bxf3 35. Qd8+ Kh7 36. Qxg5 Rxg5 37. a5) 34... cxb5 35. axb5 axb5 {[#] aiming for ...Bc4.} 36. Nxf4 $1 {[%mdl 512]} Qxf4 {The position is equal.} (36... Rxf4 37. Qxe3) 37. Qxf4 Rxf4 38. Rxd5 $11 {KRR-KRR} Rb4 39. Rfd1 Re2 {Threatens to win with ...Rbb2.} 40. R5d2 Rxd2 {Precision: White = 69%, Black = 77%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Bruzon Batista, Lazaro"]
[Black "Cori, Jorge"]
[Result "0-1"]
[ECO "B47"]
[WhiteElo "2650"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,80,32,34,6,14,12,22,25,29,24,31,20,34,16,16,13,25,18,35,30,21,0,0,0,0,0,0,0,0,7,58,0,1,7,69,58,69,77,158,86,164,133,133,136,153,133,334,327,321,302,310,213,184,66,80,60,294,0,0,0,0,0,0,-8,-8,-8,-8,-593,-594,-573,-563,-880,-879]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Qd3 {B47: Sicilian: Taimanov: 5 Nc3 Qc7 6 f4, 6 g3 and 6 Be2} (6. f4 a6 7. Be3 b5 8. Be2 Bb7 9. Bf3 Rc8 10. Nxc6 Bxc6 11. Qd4 b4 12. Ne2 Nf6 13. c4 Be7 14. O-O O-O 15. Ng3 d6 16. b3 a5 17. Kh1 Nd7 {½-½ (63) Nakamura,H (2779)-Najer,E (2679) Doha 2016}) 6... Nxd4 7. Qxd4 {Nb5 is the strong threat.} a6 $1 8. Be3 {The position is equal.} b5 9. f3 Ne7 10. O-O-O $146 ({Predecessor:} 10. Qd2 Nc6 11. Be2 Be7 12. O-O O-O 13. f4 Bb7 14. a3 Rac8 15. Rad1 {1-0 (39) Szymanowski,M (1556)-Wyszomirski,K (1656) Leba 2009}) 10... Nc6 11. Qd2 d6 12. h4 {[%cal Bh2h4,Bh4h5][%mdl 32]} Rb8 13. Kb1 Bd7 14. h5 h6 15. Bd3 b4 16. Ne2 a5 17. f4 {[%cal Bf3f4,Bf4f5][%mdl 32]} a4 18. Rc1 Be7 19. g4 {[%cal Bg2g4,Bg4g5][%mdl 32]} Bf6 (19... O-O $11) 20. Rhg1 (20. g5 $14 Bd8 21. gxh6 Rxh6 22. f5) 20... Be7 $11 21. Rcf1 Rf8 (21... Qa5 $11) 22. f5 $14 Ne5 23. g5 $1 {[%cal Rg5h6]} b3 (23... Bxg5 $142 24. Bxg5 hxg5) 24. cxb3 ({Better is} 24. gxh6 gxh6 25. Bxh6 bxa2+ 26. Kxa2) 24... axb3 (24... Nxd3 $16 25. fxe6 (25. Qxd3 axb3 26. gxh6 bxa2+ 27. Ka1 gxh6 $11) 25... fxe6 26. Rxf8+ (26. Qxd3 Rxf1+ 27. Rxf1 Bb5 $17) 26... Bxf8 27. gxh6 (27. Qxd3 axb3 28. axb3 Bb5 $14) 27... gxh6 28. Qxd3 axb3) 25. Nc3 bxa2+ {[#]} 26. Ka1 $1 hxg5 ({Less strong is} 26... Nxd3 27. Qxd3 hxg5 28. Bxg5 $11) 27. Bxg5 Bf6 $2 (27... Qb6 $16 {was called for.} 28. Bxe7 Kxe7) 28. Bxf6 $18 gxf6 29. fxe6 fxe6 30. Rg7 Qb6 31. Be2 Rf7 32. h6 Ke7 $2 ({Black should play} 32... Rxg7 $14 33. hxg7 Ke7) 33. Nd1 $2 (33. Rfg1 $18) 33... Rxg7 $11 34. hxg7 {Strongly threatening Qh6.} Ba4 35. Nc3 Bc6 $1 $36 {[%mdl 2048] Black has some pressure.} 36. Bh5 Nc4 37. Qg2 {aiming for Nd1.} Rg8 ({Much weaker is} 37... Qxb2+ $6 38. Qxb2 Nxb2 39. Rg1 $16) 38. Nd5+ $2 {[%mdl 8192]} (38. Rxf6 $1 $11 Kxf6 39. Qg6+ Ke5 40. Qg3+ Kd4 41. Nd1) 38... exd5 $19 {Black is clearly winning.} 39. exd5 {[#]} Bxd5 $1 40. Re1+ (40. Qxd5 Qxb2#) 40... Kd8 {Precision: White = 61%, Black = 49%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Sevian, Samuel"]
[Black "Vasquez Schroeder, Rodrigo"]
[Result "1-0"]
[ECO "B66"]
[WhiteElo "2601"]
[BlackElo "2553"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,53,80,58,56,56,56,59,59,59,103,77,98,98,149,88,155,79,271,268,521,501,514,515,698,685,688,692,692,692]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O h6 9. Nxc6 bxc6 10. Bf4 d5 11. Qe3 Bb4 12. Be2 {B66: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 h6} O-O 13. e5 Nh7 (13... Nd7 14. h4 c5 15. Bxh6 gxh6 16. Qxh6 Nxe5 17. Rh3 Bxc3 18. bxc3 Ra7 19. Rg3+ Ng6 20. h5 Qh4 21. Rg4 Qh2 22. Bd3 {1-0 (22) Karjakin,S (2785)-Ivanchuk,V (2747) Doha 2016}) 14. Ne4 {LiveBook: 6 Games. White is better.} f5 $1 {[%cal Rf5e4]} 15. exf6 Nxf6 16. Nxf6+ Qxf6 17. Be5 $1 {[%cal Re5f6]} Bc5 18. Qc3 $1 (18. Bxf6 $6 Bxe3+ 19. fxe3 Rxf6 $11) 18... Qxf2 19. Bd3 $1 {[#]} Ra7 $146 ({Better is} 19... Bd7) ({Predecessor:} 19... Bd7) 20. Kb1 $36 {[%mdl 3072] White has strong compensation. White is really pushing.} Bb6 (20... Raf7 $142) 21. Qb4 ({Resist} 21. Qxc6 $6 Raf7 $14) (21. Rhf1 $142 Qc5 22. Rxf8+ Kxf8 23. Qe1 (23. Rf1+ Rf7 $16)) 21... a5 $2 {[#]} (21... Bc5 $16 22. Qg4 Qe3) 22. Qg4 $1 $18 {[%cal Rg4g6]} Qe3 $2 {[#]} (22... Qf7 23. Rhf1 Qe8) 23. Qg6 $1 {[%cal Rg6h7] Qh7+ would kill now.White is clearly winning.} Qxe5 24. Rhf1 {[%csl Gd3][%cal Rg6h7]} Rff7 {...Kf8 is the strong threat.} 25. Qh7+ Kf8 {aiming for ...g5.} 26. Qh8+ Ke7 27. Rxf7+ {Precision: White = 81%, Black = 18%.} ({Less strong is} 27. Qxc8 Bf2 $14) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Fier, Alexandr"]
[Black "Bacallao Alonso, Yusnel"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2576"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,116,28,26,27,24,25,51,62,59,-39,-43,-38,-39,-50,-38,-48,21,-32,-10,-16,0,0,0,0,0,0,0,-84,-46,-76,-51,-288,-186,-184,-188,-206,0,0,0,-591,-137,-104,-122,-384,-262,-363,-46,-28,127,134,129,-206,-218,-214,-184,-183,-167,-137,-157,-166,-68,-42,-64,-183,-157,-170,-108,-113,-78,-123,-50,-66,-64,-69,-66,-68,-58,-73,-8,-95,-77,-183,-45,-43,0,-193,-30,-58,-56,-77,116]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. cxd5 exd5 6. Bf4 c6 7. h3 Be7 8. e3 O-O 9. Bd3 Re8 10. Qc2 Nf8 11. O-O Ng6 12. Bh2 Bd6 13. Bxd6 Qxd6 14. Rab1 Bd7 15. b4 {D35: Queen's Gambit Declined: Exchange Variation} Rac8 16. Rfc1 b6 17. Ba6 $146 {White is slightly better.} ({Predecessor:} 17. a4 Qe7 18. a5 Ne4 19. Bxe4 dxe4 20. Nd2 f5 21. axb6 axb6 {½-½ (32) Malek,D (2340)-Galdunts,S (2459) Germany 2011}) 17... Rb8 {next ...b5 is good for Black.} 18. b5 (18. Be2 $14) 18... c5 $15 19. dxc5 bxc5 20. Rd1 Ne5 21. Ne1 Qe6 (21... Be6 $15) 22. Nd3 (22. Rbc1 $11) 22... Qf5 23. Rbc1 d4 24. exd4 Nf3+ 25. gxf3 Qg5+ 26. Kh2 $1 Qh4 27. Qd2 (27. Nxc5 $2 Bxh3 28. Rd3 Nh5 $19) (27. Kg1 $1 $11 Qg5+ 28. Kh2) 27... cxd4 28. Na4 Nd5 29. Rh1 $2 ({White must play} 29. Re1 $1 $15) 29... Qxh3+ 30. Kg1 Qxf3 31. Rh2 Re4 $2 ({Stronger than} 31... Bxb5 32. Bxb5 Rxb5 33. Rg2 $15) (31... Bh3 $1 $19 32. Ne1 Qg4+ 33. Ng2 Re2) 32. Ne1 $1 $11 {[%cal Re1f3]} Rg4+ $40 {[%mdl 128] Black mounts an attack.} 33. Kf1 $2 {[%mdl 8192]} (33. Rg2 $1 $11 {and White stays safe.} Rxg2+ 34. Nxg2) 33... Qf6 $2 (33... Qf5 $19 {has better winning chances.} 34. Nc5 Re8) 34. Nc5 $17 Bf5 $1 35. Bb7 $2 {[%mdl 8192] [#]} (35. Ng2 $17 {was necessary.}) 35... Ne3+ $1 {[%mdl 512]} 36. Ke2 (36. fxe3 Bd3#) 36... Re8 $2 (36... Rxb7 $19 37. fxe3 (37. Nxb7 $2 {too greedy.} Qe5 $19) 37... dxe3) 37. fxe3 $15 dxe3 $2 ({Black should play} 37... Rxe3+ $11 38. Kd1 Rg1) 38. Qc3 $16 Rd4 39. Nf3 $2 {[%mdl 8192]} (39. Ncd3 $1 $16 {is forced if you want to stay better.}) 39... Rd2+ $1 $19 40. Ke1 {Threatens to win with Qxf6.} Qd6 41. Rxd2 exd2+ 42. Kf2 dxc1=Q 43. Qxc1 h6 (43... Bd3 $1 $19 {( -> ...Re2+)} 44. Nxd3 Qxd3) 44. Bc6 $15 Re7 45. Nb3 (45. Qc4 $15) 45... g5 $19 {[%cal Bg7g5,Bg5g4][%mdl 32]} 46. Qd2 Qf6 (46... Bd3 $19 47. Nbd4 Bb1) 47. Qd4 $17 Qe6 $1 {[%cal Re6e2] Strongly threatening ...Qe2+.} 48. Qd2 Kg7 (48... Bg4 $17 {aiming for ...Bxf3.} 49. Nbd4 Qf6) 49. Nc5 Qf6 $1 {Hoping for ...g4.} 50. Qd4 $1 g4 51. Qxf6+ Kxf6 52. Nd4 Bc8 (52... Re5 $17 53. Ncb3 h5) 53. a4 (53. Bd5 $11) 53... Ke5 54. Ne2 {[#]} (54. Ke3 $17) 54... Kd6 ({Better is} 54... h5 $1 $19 55. Nd3+ Kd6) 55. Ne4+ $15 Ke5 (55... Kc7 $15) 56. Nc5 $19 {[#]} f5 $2 (56... h5 $1 $19 {...h4 is the strong threat.} 57. Nd3+ Kd6) 57. Nd3+ Kd6 58. Ndf4 Ke5 $2 {Precision: White = 41%, Black = 31%.} (58... Bd7 $17 {stays on course.} 59. Nd4 Rh7) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Ortiz Suarez, Isan Reynaldo"]
[Black "Ramirez, Alejandro"]
[Result "1/2-1/2"]
[ECO "B49"]
[WhiteElo "2570"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "44"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,44,10,7,0,0,-7,-8,-49,0,-20,-40,-23,-20,-26,-20,-40,-41,-44,-37,-38,-37,-41,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Be2 Nf6 8. O-O Be7 9. f4 d6 10. Kh1 O-O 11. a4 Nxd4 12. Qxd4 Bd7 13. e5 {B85: Sicilian Scheveningen: 6 Be2 a6, lines with early Be3} Ne8 14. a5 Bc6 15. Na4 {The position is equal.} f6 $146 ({Predecessor:} 15... Rd8 16. Qc3 Rc8 17. Nb6 Rd8 18. Bd4 dxe5 19. Bxe5 Bd6 20. Rad1 Bxe5 21. fxe5 {1-0 (45) Kovchan,A (2591)-Miladinovic,L (2186) Heraklion 2015}) 16. c4 dxe5 17. fxe5 Rd8 18. Qc3 {With the idea Bb6.} Qxe5 19. Qxe5 fxe5 {Black is slightly better.} 20. Nc5 $1 Rxf1+ 21. Rxf1 Nf6 {aiming for ...Bxc5.} 22. Nxe6 Rc8 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Flores, Diego"]
[Black "Tang, Andrew"]
[Result "1/2-1/2"]
[ECO "D58"]
[WhiteElo "2567"]
[BlackElo "2461"]
[Annotator "TA"]
[PlyCount "39"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,39,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. Bd3 Bb7 9. O-O Nbd7 10. cxd5 Nxd5 11. Bg3 c5 12. Rc1 Nxc3 13. bxc3 Nf6 {D58: Queen's Gambit Declined: Tartakower Defence} 14. Qe2 {LiveBook: 3 Games. The position is equal.} Rc8 (14... Ne4 15. Be5 Bd6 16. Rfd1 Qc7 17. Qc2 Nf6 18. Bxf6 Bxf3 19. gxf3 gxf6 20. f4 {½-½ (20) Chiburdanidze,M (2497)-Krush,I (2403) Bled 2002}) 15. Ba6 Qd5 $146 ({Predecessor:} 15... Bxa6 16. Qxa6 Bd6 17. dxc5 Bxg3 18. hxg3 Rxc5 19. Qxa7 Ra5 20. Qb7 Rxa2 21. Rb1 Qc8 22. Qxc8 Rxc8 23. Rxb6 Rc2 {½-½ (23) Gattass,A (2258)-Sztokbant,B (2059) Sao Jose do Rio Preto 2012}) 16. Bc4 Qh5 17. Ba6 Qd5 18. Bc4 Qh5 19. Ba6 Qd5 20. Bc4 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Shabalov, Alexander"]
[Black "Iturrizaga Bonelli, Eduardo"]
[Result "0-1"]
[ECO "B48"]
[WhiteElo "2556"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,74,6,20,0,4,4,3,-6,0,-55,-6,-39,0,0,0,3,17,17,17,22,23,0,0,0,6,0,0,0,22,-25,-27,-46,39,26,20,-56,-50,-262,-260,-247,-257,-245,-259,-274,-269,-274,-262,-331,-314,-325,-318,-318,-318,-318,-318,-325,-250,-1385,-1362]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 Nf6 7. Bd3 a6 8. O-O Bd6 9. h3 O-O 10. Nde2 {B48: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 without Be2} (10. Qd2 Nxd4 11. Bxd4 Bf4 12. Be3 Bh2+ 13. Kh1 Be5 14. Na4 b5 15. Nb6 Rb8 16. Nxc8 Rbxc8 17. c3 Qc6 18. Rfe1 d5 19. f4 Bc7 20. e5 Nd7 21. a4 {½-½ (21) Svrsek,R (2373)-Paleckis,E (2429) Remote email 2014}) 10... b5 11. f4 {Hoping for e5.} Be7 $146 ({Predecessor:} 11... e5 12. f5 Rb8 13. Qe1 Be7 14. Ng3 Nb4 15. Qe2 Bc5 16. Bxc5 Qxc5+ {1-0 (41) Medvedyk,V-Pokotylo,M Lvov 2011}) 12. e5 {The position is equal.} Ne8 $1 13. Ng3 (13. Nd4 $11) 13... g6 14. a4 bxa4 (14... b4 $5 {[%cal Rb4c3]} 15. Nce4 f5 16. exf6 Nxf6 $11) 15. Nxa4 Rb8 16. c3 d6 17. exd6 $1 Nxd6 18. Qe2 a5 19. Ne4 Nf5 20. Bc5 Rd8 21. Rf2 (21. g4 $5 {[%cal Rg4f5]} Nd6 22. Qf2 $11) 21... Bh4 22. Rf3 Ng7 23. Bb5 f5 24. Nf2 Ne7 ({Black should try} 24... e5 $1 $15) 25. Ba6 $14 Bd7 26. Bd4 (26. Qe5 $11 Qxe5 27. fxe5) 26... Bc6 $15 27. Qc4 $2 {[#]} ({Better is} 27. Rd3 $15) 27... Rxd4 $1 $19 28. cxd4 Qa7 29. Nc5 Bxf3 ({Weaker is} 29... Rxb2 30. Nfd3 $11) 30. gxf3 {intending Nfd3.} Bxf2+ ({Less strong is} 30... Rxb2 31. Nfd3 $15) 31. Kxf2 Rxb2+ 32. Kg1 Rb4 33. Qa2 Rxd4 34. Qxa5 Rd5 ({Don't play} 34... Rxf4 35. Be2 $19) 35. Rc1 Nh5 36. Qb5 Kf7 {aiming for ...Qc7.} 37. Bb7 $2 {[#]} (37. Qb7 Qxb7 38. Bxb7) 37... Qa3 {Precision: White = 40%, Black = 65%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Erenburg, Sergey"]
[Black "Cruz, Cristhian"]
[Result "1-0"]
[ECO "C03"]
[WhiteElo "2550"]
[BlackElo "2558"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,85,36,31,43,26,39,27,29,29,18,0,31,23,31,18,29,28,24,29,77,75,64,61,66,64,64,25,37,30,31,20,22,12,23,0,13,8,9,17,13,28,23,28,139,129,147,162,170,122,134,146,189,183,233,221,514,514,507,483,515,498,496,463,593,585,1143,1073,1308,495]} 1. e4 e6 2. d4 d5 3. Nd2 Be7 4. e5 c5 5. c3 Nc6 6. Bd3 {C03: French Tarrasch: Unusual Black 3rd moves} Nh6 (6... h5 7. Ndf3 Bd7 8. Ne2 cxd4 9. cxd4 Nb4 10. Bb1 Bb5 11. O-O Rc8 12. Re1 g5 13. Nc3 Ba6 {1-0 (46) Blomqvist,E (2546)-Eljanov,P (2755) Malmo 2017}) 7. Ndf3 cxd4 8. cxd4 Nf5 9. Ne2 Qb6 10. O-O {LiveBook: 16 Games} Bd7 {[%cal Rf5d4]} 11. Kh1 (11. Bxf5 $5 exf5 12. Bg5 $14) 11... Rc8 ({Not} 11... Ncxd4 $2 12. Nexd4 Nxd4 13. Be3 $18) 12. Rb1 (12. Bd2 {is more complex.} O-O 13. b4 g6 14. Rb1 a6 15. Bc3) 12... Nb4 ({Reject} 12... Ncxd4 13. Nfxd4 Rxc1 14. Rxc1 $16) ({Avoid the trap} 12... Nfxd4 $2 13. Nexd4 Nb4 14. Be3 $18) 13. Bxf5 $1 exf5 {[#]} 14. Nc3 $146 Be6 (14... Bb5 $5) 15. Bg5 Bf8 16. a3 Nc6 17. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} h6 18. Bd2 Be7 {[#]} 19. b5 $1 {[%cal Rb5c6]} Nb8 20. Na4 Qd8 21. Nc5 Rc7 22. Bb4 O-O 23. Rc1 b6 24. Nxe6 fxe6 25. Qd2 $36 {[%mdl 2048] White fights for an advantage.} Rf7 26. g3 Bxb4 27. Qxb4 Qc8 28. Qb2 a6 29. a4 axb5 30. axb5 Kh7 (30... Rxc1 $1 $11 {keeps the balance.} 31. Rxc1 Rc7 32. Rxc7 Qxc7) 31. h4 Rfd7 32. Kg2 Qe8 33. Rxc7 Rxc7 34. Rc1 Rxc1 35. Qxc1 Qd7 36. h5 g5 $2 {[#]} (36... Qe8 {was necessary.} 37. Nh4 Qd8) 37. hxg6+ $18 {White is clearly winning.} Kxg6 38. Ng1 Kg7 39. Nh3 Qd8 40. Nf4 Kf7 41. Nh5 Kg6 42. Nf6 Nd7 43. Qc6 {Precision: White = 74%, Black = 40%.} (43. Nxd7 $142 Qxd7 44. Qc6) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Vera Siguenas, Deivy"]
[Black "Zapata, Alonso"]
[Result "0-1"]
[ECO "B47"]
[WhiteElo "2526"]
[BlackElo "2420"]
[Annotator "TA"]
[PlyCount "66"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,66,46,34,52,56,53,12,11,28,39,40,46,33,36,36,64,27,25,17,24,29,41,13,29,0,0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,-81,-82,-86,-68,-159,-154,-191,-178,-1317,-650]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 d6 7. Bg2 a6 8. O-O Be7 9. Re1 Nxd4 {B47: Sicilian: Taimanov: 5 Nc3 Qc7 6 f4, 6 g3 and 6 Be2} (9... Bd7 10. Nxc6 Bxc6 11. Qg4 h5 12. Qe2 h4 13. a4 Nf6 14. a5 Kf8 15. Be3 e5 16. Nd5 Nxd5 17. exd5 Bb5 18. c4 Qxc4 19. Qxc4 Bxc4 20. Rec1 Bd3 {½-½ (42) Navara,D (2702)-Movsesian,S (2705) Prague 2011}) 10. Qxd4 Nf6 11. a4 O-O {The position is equal.} 12. a5 e5 $146 ({Predecessor:} 12... Bd7 13. h3 Bc6 14. Be3 Nd7 15. Qd2 b6 16. axb6 Nxb6 17. Qd4 Rfb8 18. Red1 {1-0 (52) Hakki,I (2451)-Sachdev,T (2240) Abu Dhabi 2004}) 13. Qd3 Be6 14. Be3 Rac8 15. Rec1 Qc6 16. Qd2 (16. Nd5 $5 {[%cal Rd5e7]} Qe8 17. Nxe7+ Qxe7 18. b3 $16) 16... Bd8 17. h3 b5 18. axb6 Bxb6 19. Bxb6 Qxb6 20. Nd5 Bxd5 21. exd5 Qxb2 22. Rxa6 Rfd8 23. Rc6 Kf8 24. Qe3 Rb8 25. Rd1 {[%cal Bc1d1,Bd1d3,Bd3a3,Ba3a7][%mdl 32]} h6 26. Rd3 Rb4 27. Ra3 e4 28. c4 Qc2 $36 {[%mdl 2048] Black has some pressure.} 29. Kh2 (29. Ra1 $11) 29... Rb2 $17 ({Reject} 29... Rxc4 $6 30. Qb6 $14) 30. Ra7 {Threatens to win with Rcc7.} Kg8 31. Rcc7 {[#]} ({White should play} 31. Raa6 $15) 31... Rf8 $1 ({Stronger than} 31... Qxf2 32. Qxf2 Rxf2 33. Kg1 $11) 32. Re7 {[%cal Rg2e4]} Qxc4 33. Bxe4 $2 (33. Ra1) 33... Qf1 {Precision: White = 45%, Black = 76%.} (33... Nxe4 $142 34. Rxe4 Qf1) 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Garcia Pantoja, Roberto"]
[Black "Escalante Ramirez, Brian Sebasti"]
[Result "1/2-1/2"]
[ECO "B66"]
[WhiteElo "2500"]
[BlackElo "2338"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,68,0,1,-31,2,-18,-31,-16,23,29,31,4,14,0,0,0,29,-14,0,-21,-21,-16,0,-37,0,-38,0,0,0,0,18,22,11,-42,22,-95,-95,-93,-44,-105,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O h6 9. Nxc6 bxc6 10. Bf4 d5 11. Qe3 Bb4 12. a3 {B66: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 h6} (12. Be2 O-O 13. e5 Nd7 14. h4 c5 15. Bxh6 gxh6 16. Qxh6 Nxe5 17. Rh3 Bxc3 18. bxc3 Ra7 19. Rg3+ Ng6 20. h5 Qh4 21. Rg4 Qh2 22. Bd3 {1-0 (22) Karjakin,S (2785)-Ivanchuk,V (2747) Doha 2016}) 12... Ba5 13. Be2 O-O 14. e5 Nd7 15. Qg3 Bc7 {LiveBook: 13 Games} 16. Na4 (16. Bxh6 {looks sharper.} Bxe5 17. f4 Bf6 18. h4 Qa5 19. h5) 16... f5 $146 (16... Kh8 {seems wilder.} 17. Kb1 Rb8 18. c4 Qe7 19. h4 a5) ({Predecessor:} 16... Kh8 17. Qe3 Rb8 {1-0 (63) Teichmann,C (2481)-Miletic,A (2398) ICCF email 2008}) 17. exf6 {[%csl Gf6][%cal Rg3g7] [#]} (17. Bxh6 $5 {[%cal Rg3g7]} Bxe5 18. Bf4 Bxf4+ 19. Qxf4 $11) 17... Bxf4+ 18. Qxf4 Qxf6 (18... e5 {is interesting.} 19. Qe3 Qxf6 20. Rhf1 a5 21. Kb1 Ba6) 19. Qxf6 Rxf6 20. f3 c5 21. c4 Bb7 22. Bd3 d4 23. Rde1 Rb8 24. Be4 Bxe4 25. Rxe4 Rg6 26. Re2 Kf7 27. Rhe1 Ke7 28. Kc2 Kd6 29. Rd1 Nb6 30. Nxb6 Rxb6 31. Rd3 (31. b4 $11) 31... Rf6 (31... a5 $15) 32. Rb3 (32. b4 $1 $11 {remains equal.}) 32... Rxb3 $17 33. Kxb3 Rf4 34. Rd2 (34. Kc2 $15) 34... Ke5 {Precision: White = 24%, Black = 13%.} ({Black should play} 34... g5 $17 35. Kc2 a5) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Barrientos, Sergio E"]
[Black "Cordova, Emilio"]
[Result "0-1"]
[ECO "E12"]
[WhiteElo "2463"]
[BlackElo "2651"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,106,0,0,-10,-2,-28,-32,-65,-54,-60,-69,-50,-54,-78,-75,-103,-97,-125,-102,-133,-96,-103,-94,-104,-94,-167,-130,-169,-151,-181,-197,-189,-162,-182,-73,-88,-90,-156,-156,-256,-261,-237,-125,-139,-75,-273,-284,-275,-278,-251,-256,-308,-308,-390,-338,-331,-316,-323,-336,-547,-421,-577,-559,-677,-637,-516,-664,-642,-660,-625,-579,-617,-634,-924,-904,-1417,-1321,-29980,-29979,-29985,-29986,-29987,-29983,-29983,-29984,-29984,-29985,-29985,-29986,-29992,-29986,-29953,-6319,-2826,-2185,-29990,-29991]} 1. d4 Nf6 2. Nf3 e6 3. c4 b6 4. a3 c5 5. Nc3 cxd4 6. Nxd4 Bb7 7. Ndb5 {E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7} (7. Bg5 a6 8. e3 Be7 9. Rc1 d6 10. Nf3 Nbd7 11. Be2 O-O 12. O-O Qc7 13. Nd2 Rac8 14. b4 Rfd8 {0-1 (69) Adhiban,B (2671)-Iturrizaga Bonelli,E (2650) Monzon 2016}) 7... d6 $1 8. Bg5 (8. f3 {keeps more tension.} a6 9. Nd4 d5 10. cxd5 exd5 11. g4) 8... a6 9. Bxf6 {Black is slightly better.} gxf6 10. Nd4 f5 11. e3 Nd7 12. Nf3 $146 ({Predecessor:} 12. Qa4 Qc7 13. Rg1 Bg7 14. f4 h5 {½-½ (23) Suba,M (2500)-Lukacs,P (2465) Tuzla 1981}) 12... Rg8 13. g3 Rc8 14. Be2 Ne5 15. b3 Qc7 {Strongly threatening ...d5!} 16. O-O Qc6 {[%cal Re5f3]} 17. e4 fxe4 18. Nd4 (18. Nxe5 $17 dxe5 19. b4) 18... Qc5 19. Na4 Qc7 $1 20. Qd2 Rg6 21. Rad1 Ba8 22. Bh5 Qb7 (22... Rh6 $19 {is more deadly.} 23. Be2 Bb7) 23. Bxg6 $17 hxg6 24. Qe2 (24. Qe3 $142) 24... Bg7 {[%mdl 1024] Black has strong compensation.} (24... e3 25. f3 $11) 25. Qe3 (25. h3 $17 {is a better defense.}) 25... b5 $1 $19 {[%cal Rb5a4]} 26. Nb2 Rc5 ({Not} 26... bxc4 27. Nxc4 Nxc4 28. bxc4 $15) (26... Ng4 $19 27. Qe2 e3 $1 {[%mdl 512]}) 27. h3 $17 Bf6 ({Resist} 27... bxc4 28. Nxc4 Nxc4 29. bxc4 $15) (27... Kf8 $142 28. Rd2 Nd3 $1 {[%mdl 512]}) 28. b4 $2 (28. Kh2 $17) 28... Nxc4 $19 29. Nxc4 Rxc4 30. Ne2 d5 31. h4 e5 {aiming for ...d4.} 32. Qh6 Ke7 33. g4 {[#] Hoping for g5.} Qc8 $1 {[%cal Rc8g4]} 34. g5 Bh8 35. Ng3 $2 (35. h5 {keeps fighting.} e3 36. hxg6 Qg4+ 37. Ng3) 35... Qg8 36. Rc1 Bb7 37. h5 Bg7 38. Nf5+ gxf5 39. Qb6 Qc8 40. Rxc4 bxc4 41. h6 Bh8 42. Kh2 Qc6 43. Qa7 d4 44. Rg1 {[#]} e3 $1 45. fxe3 Qe4 {[%cal Re4h4]} 46. Kh3 Qxe3+ 47. Kh4 Qe4+ 48. Kh3 f4 {[%cal Bf5f4,Bf4f3,Bf3f2][%mdl 32]} 49. Qc5+ Ke8 50. Kh4 Bc6 51. Qd6 f3+ 52. Rg4 Qd5 53. Qc7 f2 {Precision: White = 31%, Black = 74%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Pulvett Marin, Daniel"]
[Black "Herrera, Juan Sebastian"]
[Result "1-0"]
[ECO "D94"]
[WhiteElo "2437"]
[BlackElo "2220"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,63,2,8,-2,24,-4,5,0,-1,-9,-8,-18,-22,-15,0,-28,-18,-37,-20,-38,-22,-19,0,-19,15,0,52,55,93,88,225,236,212,120,116,92,332,282,790,801,770,768,937,995,1309,1286,1478,1471,1427,1322,2699,2420,29995,29996]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 O-O 6. b4 c6 7. a4 {D94: Grünfeld: 4 Nf3 Bg7 5 e3} (7. Bb2 Bg4 8. h3 Bxf3 9. gxf3 Nbd7 10. f4 a5 11. b5 a4 12. Rc1 Qa5 13. Qd2 dxc4 14. bxc6 bxc6 15. Bxc4 c5 {½-½ (50) Kamsky,G (2763)-Gelfand,B (2773) Beijing 2013}) 7... Nbd7 8. cxd5 Nxd5 $146 ({Predecessor:} 8... cxd5 9. Qb3 e5 10. Nxd5 Nxd5 11. Qxd5 exd4 12. Nxd4 Qe7 13. Bd2 Re8 14. Be2 Nb6 {0-1 (30) Zenyuk,I (2153)-Shahade,J (2361) San Diego 2004}) 9. Nxd5 {The position is equal.} cxd5 10. a5 e5 11. Be2 e4 12. Nd2 Qg5 13. g3 Nf6 14. h3 h5 15. b5 Rd8 16. Ba3 Ne8 17. Rc1 h4 18. g4 f5 (18... Be6 $11) 19. Qb3 $14 Kh7 20. f4 $36 {[%mdl 2048] White is on the roll.} exf3 (20... Qf6 $16) 21. Nxf3 $18 Qf6 22. g5 (22. Ne5 $18) 22... Qe6 $16 23. Nxh4 Nd6 $2 {[#]} (23... Qe4 $16 {keeps fighting.} 24. Nf3 f4) 24. Ng2 $1 $18 Nc4 $2 (24... a6 25. bxa6 bxa6) 25. Rxc4 ({Weaker is} 25. Bxc4 dxc4 26. Qxc4 Qe8 $16) 25... dxc4 26. Bxc4 Qe4 27. O-O a6 28. Rf4 axb5 29. Rxe4 fxe4 30. Qxb5 Bxh3 31. Nf4 Bf5 32. Qb2 {Precision: White = 49%, Black = 16%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Fernandez, Fernando"]
[Black "Chumpitaz, Ann"]
[Result "1-0"]
[ECO "B48"]
[WhiteElo "2416"]
[BlackElo "2163"]
[Annotator "TA"]
[PlyCount "48"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,48,73,70,76,68,114,123,181,174,281,108,105,104,179,156,150,150,258,145,206,204,243,245,218,200,450,446,749,660,930,865,1287,1262,1576,1551,1418]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 Nf6 7. f4 {B48: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 without Be2} Nxd4 (7... Bb4 8. Ndb5 Qa5 9. e5 Nd5 10. Bd2 Nxc3 11. Bxc3 O-O 12. Qd2 a6 13. Bxb4 Qxb4 14. Qxb4 Nxb4 15. Nd4 {½-½ (15) Motylev,A (2656)-Svidler,P (2751) Tallinn 2016}) 8. Bxd4 {LiveBook: 5 Games} Bb4 9. Qf3 {White is better.} O-O $146 ({Predecessor:} 9... b6 10. O-O-O Bb7 11. Bd3 Bxc3 12. Bxc3 O-O-O 13. Bd4 d5 14. e5 Ne4 {0-1 (54) Mammadzada,G (2348)-Kantane,A (2230) Riga 2017}) 10. O-O-O a6 (10... Ne8 $16 11. Nb5 Qb8) 11. Bd3 $18 d6 (11... Ne8 $142 12. Kb1 Bc5) 12. Qg3 $2 (12. Bxf6 $18 gxf6 13. Ne2) 12... Ne8 $16 13. e5 d5 (13... f5 $16 {might work better.}) 14. Qh3 {[%csl Gd3][%cal Rh3h7] [#]} f5 15. g4 $40 {[%mdl 128] Hoping for gxf5. White has strong attack.} Bc5 (15... Bxc3 $16 {was worth a try.} 16. Bxc3 g6) 16. Ne2 (16. gxf5 $18 Bxd4 17. fxe6) 16... b5 (16... b6 $16 {keeps fighting.} 17. gxf5 exf5) 17. Rhg1 $18 b4 18. gxf5 exf5 19. Rg5 Be6 $2 (19... g6 20. Qg2 Qc6) 20. Rdg1 {White is clearly winning.} Rc8 (20... Kh8 $142 21. Rh5 Bg8 22. Bxf5 Rxf5) 21. Qh6 Qe7 22. Rh5 g6 23. Bxc5 {Threatening mate with Rxg6+!} Rxc5 {[#]} 24. Rxg6+ $1 {[%mdl 512]} Kh8 {Precision: White = 66%, Black = 22%.} (24... hxg6 25. Qh8+) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Prasca Sosa, Rafael Felipe"]
[Black "Kaidanov, Gregory S"]
[Result "1/2-1/2"]
[ECO "C77"]
[WhiteElo "2400"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,75,22,25,33,12,12,12,20,16,10,0,0,0,0,0,0,0,0,-1,0,0,0,0,-10,-10,0,0,0,0,0,0,0,0,12,2,6,6,2,1,2,2,2,2,6,2,2,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Be7 7. O-O O-O 8. c3 Bb7 {C84: Closed Ruy Lopez: Unusual White 6th moves} (8... d6 9. Nbd2 Na5 10. Bc2 c5 11. Re1 Nc6 12. Nf1 h6 13. Ng3 Be6 14. h3 Qc7 15. Nh4 Nxe4 16. Rxe4 d5 17. Rg4 Bxg4 18. Qxg4 Bxh4 19. Qxh4 f5 20. f4 e4 21. dxe4 fxe4 {½-½ (61) Amonatov,F (2581)-Filippov,A (2591) Almaty 2015}) 9. Bg5 h6 {The position is equal.} 10. Bh4 d6 11. Nbd2 Nh5 $146 ({Predecessor:} 11... Nb8 12. Re1 Nbd7 13. d4 Re8 14. a4 c6 15. Bc2 Qc7 16. Bg3 {½-½ (41) Langers,A (2168)-Schwalen,P (2077) Germany 2013}) 12. Bg3 Nxg3 13. hxg3 Na5 14. Bc2 c5 15. Re1 Bf6 16. Nf1 d5 17. d4 cxd4 18. cxd4 dxe4 19. Nxe5 Re8 20. Bxe4 Bxe4 21. Rxe4 Nc4 {[%cal Rc4e5]} 22. Qb3 Nxe5 23. Rae1 Qd6 24. Qe3 {[#]} Nf3+ $1 {[%mdl 512]} 25. Qxf3 Rxe4 26. Rxe4 Rd8 27. Ne3 Bxd4 28. Nf5 Qf6 $1 29. Nxd4 Rxd4 30. Qxf6 {[#] Intending Re8+ and mate.} Rd1+ 31. Kh2 {Re8+ would kill now.} gxf6 $11 {[%mdl 4096] Endgame KR-KR} 32. a4 bxa4 33. Rxa4 Rd6 34. Rb4 f5 35. g4 fxg4 36. Rxg4+ Kf8 37. Rb4 Ke7 38. Kg3 {Precision: White = 80%, Black = 80%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Ynojosa Aponte, Felix Jose"]
[Black "Kovalyov, Anton"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "2395"]
[BlackElo "2643"]
[Annotator "TA"]
[PlyCount "212"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,212,21,12,7,17,3,4,0,10,0,0,-24,-8,-26,-13,-26,-21,-25,-27,-43,-42,-42,-42,-43,-43,-43,-35,-43,-36,-29,-29,-36,-36,-29,-29,-29,-29,-29,-29,-58,-51,-58,-42,-57,-28,-65,-56,-56,-47,-81,-47,-106,-47,-87,-47,-80,-47,-72,-39,-98,-39,-47,0,-47,-47,-54,-54,-54,-47,-54,-47,-54,-47,-54,-47,-54,-47,-54,-47,-54,-54,-54,-54,-54,-34,-34,-34,-40,-34,-34,-34,-34,-34,-41,-45,-48,-34,-60,-52,-54,-49,-150,-34,-55,-34,-34,0,-57,-34,-46,-51,-85,-87,-84,-34,-87,-34,-113,-34,-34,-34,-34,-34,-34,-34,-34,-34,-34,-34,-41,-34,-34,-34,-50,-41,-58,-60,-41,-34,-76,-58,-66,-68,-69,-41,-60,-34,-41,-41,-37,0,0,0,0,0,0,120,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-106,-99,-81,-89,-81,-74,-88,-87,-180,-158,-184,-169,-29991,-29991,-29992,-29993,-29993,-29994,-29994,-29994,-29994,-29995,-29995,-29993,-29993,-29994,-29994,-29995,-29995,-29993,-29996,-29995]} 1. c4 e6 2. Nc3 Bb4 3. e4 Ne7 4. Nf3 O-O 5. a3 Bxc3 $1 6. dxc3 {A13: English Opening: 1...e6} d6 7. Bd3 (7. c5 $5) 7... Nd7 8. Bc2 $146 {The position is equal.} ({Predecessor:} 8. O-O b6 9. Bg5 h6 10. Bh4 Qe8 11. Re1 {0-1 (61) Timofeev,A (2601)-Riazantsev,A (2651) Sochi 2016}) 8... b6 9. Qe2 Bb7 10. Bg5 h6 11. Bxe7 (11. Bd2 {is more complex.} Ng6 12. O-O e5 13. g3 a5 14. Ne1) 11... Qxe7 12. O-O-O a5 13. h4 e5 14. h5 a4 15. Nh4 Nc5 16. Nf5 Qg5+ (16... Qd8 {seems wilder.} 17. Kb1 Bc8 18. Qd2 Qf6 19. Rhg1 Bd7) 17. Kb1 Bc8 18. Ne3 Bd7 19. g3 Rab8 20. Nd5 Qd8 21. f4 Re8 22. f5 f6 23. Bd3 Rf8 24. g4 Bc6 25. Nb4 Qd7 26. Rh2 Kf7 27. Kc2 Ke7 28. Kd2 Ra8 29. Ke3 Ra5 30. Kf3 (30. Nxc6+ $15 Qxc6 31. Bc2) 30... Kd8 ({Black should try} 30... Nxd3 $17 31. Qxd3 Kf7) 31. Qe3 Kc8 32. Rf2 Kb7 33. Qe2 Ka7 34. Qe3 (34. Bb1 $15) 34... Nb7 ({Black should play} 34... Nxd3 $17 35. Qxd3 Bb7) 35. Bf1 Nc5 36. Nxc6+ (36. Bd3 $5) 36... Qxc6 37. Rfd2 Kb7 38. Rd5 Rfa8 39. Be2 Qe8 40. Bf1 Qf7 41. Be2 Qe7 42. Bf1 Rd8 43. Qd2 Rd7 44. Bg2 Ra8 45. Kg3 Rad8 {Threatens to win with ...c6.} (45... Nb3 $5 {[%cal Rb3d2]} 46. Qd3 Nc5 $15) 46. Qe2 c6 47. R5d2 Nb3 48. Rd3 Ra8 {[%cal Bd8a8,Ba8a5,Ba5c5][%mdl 32]} 49. Bf1 Ra5 50. Rf3 Kc7 51. Kh3 Rc5 52. Rf2 Qf7 53. Kh2 Kd8 54. Kh3 Ke7 55. Kh2 (55. Qc2 $15) 55... Qg8 (55... Na5 $1 $17 {[%cal Ra5c4]} 56. Qf3 Nxc4) 56. Kg1 Qa8 57. Rh2 Qg8 58. Rf2 Kd8 59. Rh2 Kc7 60. Rf2 Qa8 61. Qc2 Qb7 62. Qe2 (62. Kh2 $15) 62... Qb8 (62... Na5 $17) 63. Rh2 (63. Qc2 $15) 63... Qf8 (63... Na5 $1 $17 64. Qf3 Nxc4 65. Bxc4 Rxc4) 64. Rf2 $15 Ra5 65. Qe3 Ra8 66. Kh1 Re8 67. Rh2 Qe7 68. Rf2 Qd8 69. Rh2 Rf8 70. Rf2 Qa8 71. Rh2 Qa5 72. Qe2 Qc5 73. Rh3 Rfd8 74. Kh2 Na5 75. Rg3 Rb8 76. Rg2 Nb3 77. Rg3 Qa5 78. Qe3 Rbd8 79. Qe2 d5 80. cxd5 cxd5 81. exd5 Rxd5 82. Qc4+ Kb8 (82... Qc5 $1 $11 {keeps the balance.} 83. Rxd5 Rxd5) 83. Rxd5 (83. Rgd3 $16 Rxd3 84. Rxd3) 83... Qxd5 $11 84. Qxa4 Nd2 85. Bg2 (85. Be2 $5 {[%cal Rg3d3]} Qc5 86. Rg2 $11) 85... e4 86. Qb4 Rd6 {White must now prevent ...Qe5.} 87. c4 Qe5 88. Kh3 Qd4 89. Qb5 Kc7 90. c5 bxc5 91. Qa5+ {[#]} (91. b3 $1 $11) 91... Kb7 $1 $17 92. Qb5+ Rb6 93. Qe8 Rxb2 94. Qe7+ Kb6 95. Qxg7 {[#]} (95. Qf8 $17) 95... Nf3 $1 $19 {[%cal Rf3g1][%mdl 512]} 96. Bxf3 exf3 97. Rxf3 $2 $17 {[%mdl 4096] Endgame KQR-KQR} (97. Qf8 $19) 97... Rb1 {Black mates.} 98. Qf7 Rh1+ 99. Kg3 Qe5+ 100. Rf4 Qe3+ 101. Rf3 Qe1+ 102. Rf2 Qg1+ 103. Kf3 Rh3+ 104. Ke2 Qxg4+ 105. Ke1 Qe4+ 106. Kd1 Rh1+ {Precision: White = 41%, Black = 49%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Cori Quispe, Kevin Joel"]
[Black "Castaneda, Jorge Luis"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2390"]
[BlackElo "2155"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,55,39,20,77,60,78,66,106,88,116,118,121,100,104,107,123,96,175,118,111,114,150,93,158,90,91,79,96,103,101,59,101,96,582,592,591,582,600,599,29996,29997]} 1. e4 c6 2. d4 d5 3. e5 c5 4. dxc5 e6 5. a3 Nc6 (5... Bxc5 6. Nf3 Ne7 7. Bd3 Ng6 8. O-O Nc6 9. b4 Bb6 10. Bb2 Nf4 11. c4 Nxd3 12. Qxd3 dxc4 13. Qxc4 {1-0 (30) Karjakin,S (2783)-Topalov,V (2741) Shamkir 2017}) 6. Nf3 {B12: Caro-Kann: Advance Variation} Bxc5 7. b4 Bb6 8. Bb2 Nge7 9. Bd3 {LiveBook: 46 Games} h6 (9... Ng6 $11) 10. O-O O-O $146 ({Predecessor:} 10... a5 11. b5 Nb8 12. c4 Nd7 13. cxd5 Nxd5 {1-0 (47) Banzea,A (2202)-Bogdan,D (2384) Arad 2015}) 11. Nbd2 {[%cal Bb1d2,Bd2c4,Bc4d6][%mdl 32]} Nf5 12. c4 dxc4 13. Nxc4 Ncd4 14. Nxd4 Bxd4 15. Bxd4 Nxd4 16. Nd6 Nc6 (16... Nf5 $16) 17. f4 (17. Qe2 $18) 17... Qb6+ 18. Kh1 Bd7 19. Rf3 (19. b5 $142 Ne7 20. a4) 19... Ne7 (19... Nd4 $142) 20. Rg3 (20. Bc2 $142) 20... Nf5 $16 21. Bxf5 exf5 22. Qh5 {Threatening mate with Qxh6.} Qf2 23. Rf3 $40 {[%mdl 128] Black needs to defend precisely.} ({Wrong is} 23. Qxh6 $2 Qxg3 24. hxg3 gxh6 $19) 23... Qd4 24. Raf1 {Rg3 is the strong threat.} f6 $2 {[%mdl 8192]} (24... Be6 $16 {is a better chance.}) 25. Rg3 $18 {White threatens Qg6 and mate.} fxe5 {[#]} 26. Rd1 $1 {[%cal Rd1d4]} Qb2 27. Nc4 {White wants to mate with Rxg7+!} Qc2 {[#] And now ...Be8 would win.} 28. Rxg7+ $1 {[%mdl 512] Precision: White = 62%, Black = 24%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Umetsubo, Cesar Hidemitsu"]
[Black "Peralta, Fernando"]
[Result "0-1"]
[ECO "E27"]
[WhiteElo "2381"]
[BlackElo "2569"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,74,29,31,31,29,20,29,23,29,19,22,31,43,43,43,43,43,43,43,48,46,33,29,14,14,6,17,8,23,-56,-58,-88,-80,-70,-76,-133,-140,-160,-145,-161,-133,-132,-120,-131,-125,-307,-283,-564,-529]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 O-O 6. f3 d5 7. e3 c5 8. cxd5 exd5 9. Bd3 b6 10. Ne2 Ba6 11. O-O Re8 12. Ng3 Bxd3 13. Qxd3 Nc6 14. Bb2 c4 15. Qd2 {E49: Nimzo-Indian: Rubinstein: 5 Bd3 d5 6 a3 Bxc3+ 7 bxc3} (15. Qe2 h5 16. Rae1 h4 17. Nf5 Ne7 18. Nxh4 g5 19. e4 gxh4 20. Bc1 Qd7 21. Bg5 Nh7 22. Bxh4 Ng6 {½-½ (38) Navara,D (2727)-Aleksandrov,A (2593) Wroclaw 2014}) 15... h5 16. Rae1 h4 17. Nh1 {White has an edge.} b5 18. Nf2 a5 19. e4 {[%cal Be3e4,Be4e5][%mdl 32]} Rb8 $146 ({Predecessor:} 19... b4 20. axb4 axb4 21. cxb4 Qb6 22. Bc3 h3 23. e5 hxg2 24. Kxg2 Nh7 25. Ng4 Ne7 26. Kh1 Ra3 27. Rg1 Qe6 28. f4 {½-½ (28) Andersen,J (2205)-Solar,J (2371) ICCF email 2009}) 20. e5 Nh7 21. f4 b4 22. axb4 axb4 23. Nd1 f5 24. Ne3 Qd7 25. Qf2 bxc3 (25... h3 $5) 26. Bxc3 Rb3 27. Rc1 h3 28. Qf3 (28. Kh1 $11) 28... hxg2 $15 29. Rf2 Ne7 $1 30. Rxg2 Nf8 $1 31. Qh5 (31. h3 $142) 31... Reb8 {[%cal Be8b8,Bb8b3,Bb3b1][%mdl 32]} 32. Kh1 {[#]} Rb1 $1 {[%cal Rb1c1]} 33. Rcg1 {[#]} Rxg1+ $1 34. Rxg1 Rb3 35. Bd2 Qe6 36. Rg5 $2 (36. Qg5 $17 Nfg6 37. Re1) 36... Rb1+ $19 37. Nd1 $2 (37. Rg1 Qb6 38. Nc2) 37... Qb6 {Precision: White = 39%, Black = 92%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Zavarce, Oscar Enrique"]
[Black "Cuartas, Jaime Alexander"]
[Result "0-1"]
[ECO "A30"]
[WhiteElo "2364"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,82,22,53,21,83,6,68,47,90,65,100,97,90,111,95,40,118,93,102,104,95,77,80,79,77,75,78,72,94,59,108,91,139,132,135,95,87,0,0,0,0,5,16,0,43,13,14,18,9,0,0,0,0,-114,-114,-177,-181,-181,-189,-180,-187,-218,-182,-443,-440,-29995,-1479,-1214,-1256,-1089,-1070,-1063,-1057,-29998,-29999]} 1. c4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 Bb4+ (5... d6 6. N1c3 a6 7. Na3 Be6 8. g3 f5 9. Bg2 Nf6 10. O-O Be7 11. e4 fxe4 12. Nxe4 O-O {½-½ (69) Giri,A (2768)-Jobava,B (2717) Tashkent 2014}) 6. Bd2 $146 {Strongly threatening Bxb4. A30: Symmetrical English: Double Fianchetto and Hedgehog} ({Predecessor:} 6. N1c3 Nf6 7. a3 Bxc3+ 8. Nxc3 O-O 9. g3 d6 10. Bg2 Be6 11. b3 Qb6 12. O-O Nd4 {1-0 (45) Stoer,A (2140)-Schwarm,G (2010) Bayern 1996}) 6... Bc5 (6... Be7 $11) 7. Be3 (7. N1c3 $1 $16) 7... Bxe3 (7... Bb4+ $1 $11 8. N1c3 Nge7) 8. fxe3 {And now Qd6 would win.White is slightly better.} Kf8 9. g3 h5 10. Bg2 h4 11. N1c3 Nf6 12. Qd2 (12. Nd6 $16) 12... Ne8 (12... d5 $1 $14) 13. Rf1 d6 14. O-O-O ({But not} 14. Qd5 Qe7 $15) 14... Be6 15. Nxd6 Nxd6 16. Qxd6+ Qxd6 17. Rxd6 Ke7 18. c5 Rac8 19. Bd5 Nd8 20. b4 Bh3 21. Rd1 $1 b6 22. Bc4 Nb7 {[#]} 23. R6d2 ({Better is} 23. Nd5+ $1 $16 Kf8 24. Nxb6 axb6 25. Rxb6) 23... bxc5 $11 24. b5 Rh6 25. Bd5 Nd6 26. e4 Bg4 27. a4 (27. Bc6 $5 {[%cal Rc3d5]} hxg3 28. hxg3 $11) 27... hxg3 28. hxg3 Rh3 29. Bc6 Rxg3 30. Nd5+ Kf8 31. Nf6 (31. Rh1 $11 Rh3 32. Rxh3 Bxh3 33. Ne3) 31... Nc4 $36 {[%mdl 2048] Black has strong initiative.} 32. Nd7+ {[#]} (32. Nxg4 $17 Nxd2 33. Rxd2 Rxg4 34. Rd7) 32... Ke7 $1 $19 33. Rd3 Rxd3 34. Rxd3 Bxe2 35. Rc3 Kd6 {...Rh8 is the strong threat.} 36. Rg3 $2 (36. Rc2 Bg4 37. Rxc4 Bxd7 38. Bxd7 Kxd7 39. Rc2) 36... Rh8 37. Rxg7 (37. Bd5 $19 Rh1+ 38. Kc2) 37... Bd3 (37... Rh1+ $142 38. Kc2 Bd1+ 39. Kc3 Rh3+ 40. Rg3 Rxg3+ 41. Kxc4 Be2#) 38. Rg1 Rh2 {( -> ...Ra2)} 39. Rd1 Rc2+ 40. Kb1 Nd2+ 41. Ka1 Nb3+ {Precision: White = 37%, Black = 42%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Echavarria, Johann"]
[Black "Hungaski, Robert Andrew"]
[Result "0-1"]
[ECO "C97"]
[WhiteElo "2309"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,86,20,32,41,60,32,43,14,17,9,22,5,20,21,41,42,37,35,59,52,60,0,55,8,41,23,29,20,20,18,8,8,8,12,8,-20,-16,-23,-27,-24,0,-79,-52,-76,-78,-100,-69,-76,-92,-72,-7,-500,-84,-107,-83,-484,-476,-3009,-3042,-29991,-29992,-29993,-29991,-29994,-29995]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. d5 Bd7 13. b3 {C97: Closed Ruy Lopez: Chigorin Defence: 11 d4 Qc7, sidelines} Nb7 14. Nbd2 (14. c4 b4 15. Nbd2 g6 16. Nf1 Nh5 17. Bh6 Ng7 18. g4 f6 19. a3 a5 20. Ng3 Rab8 {½-½ (53) Hou,Y (2667)-Grandelius,N (2646) Fagernes 2016}) 14... c4 15. b4 {White is slightly better.} a5 16. a3 Ra6 $146 ({Predecessor:} 16... a4 17. Nf1 h6 18. N3h2 Nh7 19. Ng3 Bg5 20. Nf5 Bxf5 21. exf5 Bxc1 22. Rxc1 {1-0 (113) Vea,O (2217)-Briseid,H (2159) Norway 2014}) 17. Rb1 axb4 18. cxb4 g6 19. Ra1 Nh5 20. Nb1 Ng7 21. Nc3 Rfa8 22. Bb2 (22. Qe2 $14) 22... f6 (22... Qb6 $11) 23. Qd2 Qb6 24. Ra2 Nd8 25. Rea1 Nf7 26. Bc1 f5 27. Qd1 f4 28. a4 Ne8 29. axb5 Rxa2 30. Rxa2 Rxa2 31. Nxa2 Qxb5 32. Qd2 (32. Qe2 $11) 32... g5 33. Qc3 h5 {[%cal Bh7h5,Bh5g4,Bg4g3,Bg3f2][%mdl 32]} 34. Nd2 g4 35. hxg4 hxg4 36. Nxc4 Nf6 ({Black should play} 36... Qa6 $17) 37. Na5 $2 {[%mdl 8192] [#]} (37. Bd3 $11 Qb8 38. Qb2) 37... Nh5 $2 (37... g3 $1 $19 {[%mdl 512] has better winning chances.} 38. Nc4 (38. fxg3 $2 Qb6+ 39. Be3 fxe3 $19) 38... gxf2+ 39. Kxf2 Qa6) 38. Qd3 {[#]} Qb6 $1 {And now ...g3 would win.} 39. Bb3 $2 {[%mdl 8192]} (39. Nc4 $17 {was the crucial defense.} Qa7 40. Qa3) 39... Bh4 $19 40. Qc2 (40. Be3 $142 fxe3 41. Qxe3 Qxe3 42. fxe3) 40... g3 {[%cal Rg3f2]} 41. Bc4 gxf2+ {Black mates.} 42. Kh2 Bg3+ 43. Kh1 Qd8 {Precision: White = 35%, Black = 45%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.15"]
[Round "8"]
[White "Avila Pavas, Santiago"]
[Black "Pichot, Alan"]
[Result "0-1"]
[ECO "A45"]
[WhiteElo "2056"]
[BlackElo "2577"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,90,18,8,9,37,38,34,27,23,23,41,-12,2,-8,2,0,2,-34,-12,-17,-4,-35,-31,-62,-51,-55,-39,-209,-198,-224,-237,-240,-235,-217,-108,-107,-97,-114,-120,-115,-108,-118,-102,-112,-93,-106,-87,-87,-84,-84,-60,-76,-4,-12,-4,-87,-62,-79,-71,-78,-78,-83,-77,-108,-77,-85,-93,-85,-17,-97,-89,-121,-117,-267,-265,-276,-273,-325,-340,-334,-318,-338,-314]} 1. d4 Nf6 2. Bf4 g6 3. e3 d6 4. Nf3 Nh5 5. Bg5 h6 6. Bh4 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} g5 7. Nfd2 (7. Bg3 Nd7 8. c4 Bg7 9. Nc3 Ndf6 10. Be2 c6 11. Qc2 a6 12. Nd2 Nxg3 13. hxg3 {0-1 (93) Bindrich,F (2590)-Kozul,Z (2613) Doha 2016}) 7... Ng7 8. Bg3 {White is slightly better.} Nf5 9. Bd3 h5 {aiming for ...h4.} 10. Bxf5 (10. Qf3 $14) 10... Bxf5 $11 11. h4 g4 12. Nc3 Bg7 13. O-O $146 ({Predecessor:} 13. Qe2) 13... Nd7 14. e4 Bg6 15. Nb3 e5 16. f4 gxf3 17. Rxf3 c6 18. Qd3 $2 {[#]} ({White should play} 18. d5 $15) 18... exd4 $1 $19 19. Nxd4 Qb6 20. Bf2 Ne5 21. Nf5 Bxf5 (21... Qxb2 $19 {is more deadly.} 22. Nxg7+ Ke7) 22. Bxb6 $17 Nxd3 23. Rxd3 axb6 24. exf5 d5 25. a3 Bf6 26. Re1+ Kf8 27. g3 Rg8 28. Kf2 Rg4 29. Nd1 Ra5 30. Rf3 Rb5 (30... Rd4 $17 {...Rd2+ is the strong threat.} 31. c3 Rd2+ 32. Ke3 Rg2) 31. b4 $11 Rc4 32. c3 {[#]} (32. Re2 $1 $11 {keeps the balance.}) 32... d4 $1 $17 {[%cal Rd4c3]} 33. cxd4 Bxd4+ 34. Kf1 Re5 35. Rxe5 Bxe5 {[%mdl 4096] Endgame KRB-KRN} 36. Kg2 Rc2+ 37. Rf2 Rc1 38. Rd2 c5 ({Black should try} 38... Ke7 $17) 39. Kf3 (39. Ne3 $11 {remains equal.}) 39... Ra1 40. bxc5 bxc5 41. Ne3 (41. Ke4 $17 Bxg3 42. f6) 41... Rxa3 $19 {Black has a decisive advantage.} 42. Ke4 Bd4 ({Don't take} 42... Bxg3 43. f6 $19) 43. Nd5 Rxg3 44. f6 {Now Ra2 and White clings on.} Rg1 45. Re2 Rf1 {Precision: White = 39%, Black = 61%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Iturrizaga Bonelli, Eduardo"]
[Black "Cori, Jorge"]
[Result "1/2-1/2"]
[ECO "A40"]
[WhiteElo "2663"]
[BlackElo "2618"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,60,9,29,29,33,21,34,37,26,26,35,37,29,30,43,38,36,21,53,37,56,50,45,47,75,65,80,47,172,160,152,41,52,0,0,0,60,23,14,0,0,-26,0,0,0,0,0,0,0,-28,0]} 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 Qe7 5. Bg2 O-O 6. Nc3 d6 {LiveBook: 12 Games} (6... d5 $5) 7. e3 {E00: Catalan Bogo-Indian (3 g3 Bb4+)} (7. a3 Bxc3 8. Bxc3 e5 9. d5 a5 10. b4 Nbd7 11. Nf3 Ne4 12. Bb2 Nb6 13. Qc2 f5 14. O-O Bd7 {1-0 (46) Gelashvili,T (2605)-Khurtsidze,N (2443) Antakya 2010}) 7... e5 8. Nge2 exd4 9. Nxd4 {White is slightly better.} Bxc3 10. Bxc3 (10. bxc3 c5 $17) 10... Ne4 11. Qc2 Re8 12. O-O Nc6 13. b3 $146 ({Predecessor:} 13. Rfe1 Bd7 14. b3 Nxc3 15. Qxc3 {1-0 (45) Cioara,A (2465)-Nestorovic,D (2411) Paracin 2013}) 13... Bd7 14. Bb2 f5 15. Ne2 {[%cal Bd4e2,Be2f4,Bf4d5][%mdl 32]} Ne5 16. Nf4 Qf7 17. Nd5 ({Don't play} 17. Bxe4 fxe4 18. Bxe5 (18. Qxe4 $2 Bc6 $19) 18... Rxe5 $15) 17... Bc6 18. Rad1 {[%cal Ba1d1,Bd1d4,Bd4f4][%mdl 32]} a5 19. Rd4 ({Reject} 19. Bxe4 fxe4 20. Bxe5 Rxe5 $11) 19... Re6 (19... Rac8 $14) 20. f3 $18 (20. Bxe4 fxe4 21. f4 Nf3+ 22. Rxf3 exf3 $11) 20... Nc5 21. Rfd1 ({White should try} 21. e4 $16) 21... Rf8 22. Rf4 Ng6 23. Rfd4 Ne5 24. Qe2 Rfe8 25. Qd2 Rh6 26. Qf2 Ne6 (26... a4 $5 {[%cal Ra4b3]} 27. Qc2 Ne6 $15) 27. R4d2 $1 Qh5 28. h4 Qf7 29. Nf4 Nc5 30. Rd4 b6 {Precision: White = 41%, Black = 58%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Cordova, Emilio"]
[Black "Sevian, Samuel"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2651"]
[BlackElo "2601"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,95,6,3,3,0,8,0,8,0,8,0,0,0,5,0,27,13,11,21,23,9,10,2,11,9,14,11,18,15,19,4,24,17,24,17,29,23,51,49,45,44,46,23,37,30,50,27,39,45,44,19,15,14,44,11,12,17,10,10,22,10,38,18,21,2,2,2,5,0,0,0,0,0,0,0,17,6,24,6,14,12]} 1. Nf3 d5 2. g3 Bg4 3. Bg2 e6 4. O-O Nf6 5. c4 c6 6. cxd5 Bxf3 7. Bxf3 cxd5 8. d4 Nc6 9. Nc3 Be7 {A11: English Opening: 1...c6} 10. e3 O-O 11. Bd2 Rc8 12. Rc1 Nd7 13. Qe2 (13. Ne2 Nb6 14. Nf4 Nc4 15. Bc3 Bb4 16. b3 Nb6 17. Bb2 {1-0 (55) Karjakin,S (2762)-Eljanov,P (2717) Baku 2015}) 13... Nb6 14. Rfd1 a6 15. Be1 Bf6 $146 ({Predecessor:} 15... f5) 16. Bg2 Rc7 17. Qc2 Qb8 18. Qb1 Rfc8 19. Ne2 {[%cal Bc3e2,Be2f4,Bf4d3,Bd3b4][%mdl 32]} Ne7 20. Nf4 Rxc1 21. Rxc1 Rxc1 22. Qxc1 Nc6 23. Bf1 Qc8 24. b3 Be7 25. Nd3 Nd7 26. a4 Na7 27. Qxc8+ Nxc8 28. f3 Na7 29. Nb4 Nb8 30. Kf2 Kf8 31. Bc3 Nac6 32. Nc2 Nd7 33. Bd3 g6 34. Ke2 h5 35. h3 Bd6 36. g4 hxg4 37. hxg4 Ke7 38. Be1 Kd8 39. Kd1 Kc7 40. g5 Be7 41. f4 Nb6 42. Bg3 Kd8 43. Ne1 Bb4 44. Bb1 Nc8 45. Nd3 Be7 46. Be1 Nd6 47. Nf2 Nf5 48. Ng4 {Precision: White = 39%, Black = 44%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Kovalyov, Anton"]
[Black "Erenburg, Sergey"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2643"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,61,29,31,39,38,35,38,37,53,45,27,46,24,-1,8,18,22,29,27,-20,31,24,31,26,51,23,33,12,17,23,29,10,47,21,56,22,51,13,20,28,43,6,6,6,6,6,6,9,12,0,0,0,0,0]} 1. c4 c6 2. d4 d5 3. Nf3 {[%cal Bg1f3,Bf3h4,Bh4f5,Bf5g3][%mdl 32]} Nf6 4. e3 a6 5. Nbd2 Bf5 6. Nh4 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4} Be4 7. Qb3 {f3 is the strong threat.} Ra7 8. Nxe4 {White is slightly better.} dxe4 $146 ({Predecessor:} 8... Nxe4 9. Nf3 e6 10. Bd3 f5 11. cxd5 cxd5 12. Qa4+ Qd7 13. Qxd7+ Nxd7 {1-0 (71) Lupulescu,C (2620)-Costachi,M (2460) Calimanesti Caciulata 2017}) 9. Nf5 e6 ({Reject} 9... Qa5+ $6 10. Bd2 $16) 10. Ng3 c5 11. dxc5 Nbd7 12. Qa4 Bxc5 13. Bd2 O-O 14. Bc3 Bd6 (14... b5 $11 15. Qc2 b4 16. Bxf6 Nxf6) 15. Qc2 $14 Be5 16. Be2 Qc7 17. O-O Raa8 18. Rfd1 Bxc3 19. Qxc3 a5 20. b3 Rfc8 21. Rac1 b6 22. a3 h6 23. b4 axb4 24. axb4 Ra4 25. Ra1 Rxa1 {The position is equal.} 26. Rxa1 Ne5 {[%cal Re5c4]} 27. Rc1 Rd8 28. h3 Nd3 29. Rd1 {[%cal Re2d3] [#]} Nd5 $1 {[%mdl 512]} 30. Qd2 (30. cxd5 Qxc3) 30... Nf6 31. Qc3 {Precision: White = 62%, Black = 56%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Delgado Ramirez, Neuris"]
[Black "Zapata, Alonso"]
[Result "1-0"]
[ECO "B41"]
[WhiteElo "2613"]
[BlackElo "2420"]
[Annotator "TA"]
[PlyCount "113"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,113,16,22,33,23,26,18,35,28,47,41,52,19,27,24,47,27,32,33,26,14,20,13,27,27,33,37,42,42,40,39,50,42,42,40,42,42,43,45,291,270,287,278,274,282,287,268,277,279,253,243,243,241,274,287,278,280,267,256,277,268,262,258,301,301,308,304,318,301,304,288,319,330,331,290,290,286,289,298,320,321,318,302,347,345,345,342,350,346,347,329,331,322,322,322,508,427,432,417,431,429,424,416,532,506]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. g3 d5 6. Nb3 {LiveBook: 3 Games. B41: Sicilian: Kan Variation: 5 c4} Nf6 7. exd5 exd5 8. Bg2 $146 {White has an edge.} ({Predecessor:} 8. h3 Bb4+ 9. c3 Bd6 10. Qe2+ Be6 11. Be3 O-O 12. N1d2 Re8 13. Bg2 Nc6 14. Nf3 Qc8 15. g4 Ne4 16. Qd3 Qc7 17. O-O Rad8 18. Nbd4 Bc8 19. Rad1 Ne7 20. Ng5 {½-½ (20) Romero Holmes,A (2518)-Gonzalez de la Torre,S (2405) Sestao 2010}) 8... Nc6 9. O-O Be7 10. Nc3 {[%cal Rc3d5,Bb1c3,Bc3a4,Ba4c5][%mdl 32]} Be6 11. Be3 O-O 12. Na4 Ne5 13. Nac5 Bg4 14. f3 Bc8 15. Nd3 Nc4 16. Bf2 Bf5 17. Nd4 Bg6 18. b3 Na3 19. Qd2 $36 {[%mdl 2048] White has some pressure.} Qc7 20. c3 Bd6 21. Nf4 Rfe8 22. Rfe1 Rxe1+ 23. Rxe1 Nb1 24. Qe3 Nxc3 $2 ({Better is} 24... Na3 $1 $14) 25. Nxg6 hxg6 26. Rc1 Bb4 {[#]} 27. a3 $1 {[%cal Ra3b4][%mdl 512]} Re8 (27... Bxa3 28. Qxc3) 28. Qd3 Bxa3 29. Qxc3 Qd7 30. Rd1 Rc8 31. Qd3 Bb4 32. Nc2 Bc5 33. Bxc5 Rxc5 34. Ne3 Qc7 35. Qd4 Rb5 36. b4 Qe7 37. Nc2 Qc7 38. Rd2 Rb6 39. Bf1 Re6 40. Kf2 Qe7 41. Ne3 Rc6 42. Rc2 (42. Nxd5 Nxd5 43. Qxd5 Qxb4 $18) 42... Rxc2+ 43. Nxc2 Qc7 44. Ne3 Qc1 45. h4 ({Don't take} 45. Nxd5 Nxd5 46. Qxd5 Qb2+ 47. Be2 Qxb4 $18) 45... Qc6 46. Be2 Qe6 47. Ng2 Qc6 48. Nf4 Qd6 49. Kg2 Qc6 50. g4 Qc2 51. Kf2 Qc7 52. Bd3 ({But not} 52. Nxd5 $6 Qh2+ 53. Ke1 Qxh4+ 54. Kd1 Qg5 $18) 52... Qc1 (52... Ne4+ $142 53. Bxe4 dxe4) 53. Nxd5 Qd2+ 54. Kf1 Qd1+ 55. Kg2 {[#] Black must now prevent Ne7+.} Qd2+ 56. Kh3 {Strongly threatening Ne7+.} Nxd5 57. Qxd5 {Precision: White = 83%, Black = 62%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Pichot, Alan"]
[Black "Panesso Rivera, Henry"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2577"]
[BlackElo "2421"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,57,25,27,43,46,48,35,35,29,42,41,38,-10,-10,-5,-5,-8,0,18,75,68,75,64,56,64,105,88,91,89,133,129,139,134,373,280,295,299,281,283,289,291,393,390,381,392,381,378]} 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Bc4 Nf6 5. Qe2 O-O 6. O-O Bg4 7. Rd1 {LiveBook: 8 Games. B06: Modern Defence} (7. h3 Bxf3 8. Qxf3 Nc6 9. c3 e5 10. Rd1 Nd7 11. Be3 Qe7 12. Na3 Nb6 13. Bb5 f5 14. Bxc6 bxc6 15. exf5 e4 16. f6 Rxf6 {0-1 (61) Bacrot,E (2718)-Ponomariov,R (2714) Beijing 2014}) 7... d5 8. exd5 Nxd5 9. Qe4 $146 {White is slightly better.} ({Predecessor:} 9. h3 Bxf3 10. Qxf3 e6 11. c3 c6 12. Nd2 Nd7 13. Bb3 N7f6 {0-1 (71) Strobel,M-Unger,M Germany 1990}) 9... Bxf3 10. Qxf3 c6 11. Bb3 a5 12. c4 a4 13. cxd5 {[#] Bc4 is the strong threat.} axb3 14. Qxb3 Qxd5 15. Qxb7 Ra4 (15... Na6 $11 {keeps the balance.}) 16. Nc3 $36 {[%mdl 2048] White is more active.} Rxd4 17. Be3 (17. Nxd5 $2 {gets mated.} Rxd1#) 17... Qd7 18. Qb6 Rd3 19. Rxd3 Qxd3 20. Rd1 Qc4 21. Rd8 Na6 22. h3 Nb4 $2 (22... f5 $16 {might work better.}) 23. Qb8 {[#] White wants to mate with Rxf8+.} Na6 24. Qc8 {Rxf8+ would kill now.} Nc5 25. Rxf8+ Bxf8 26. Qxc6 e5 27. Nd5 {White is winning.} Qc2 28. Nf6+ Kg7 29. Ng4 {Precision: White = 73%, Black = 38%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Peralta, Fernando"]
[Black "Fernandez, Fernando"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2569"]
[BlackElo "2416"]
[Annotator "TA"]
[PlyCount "140"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 32,140,30,33,30,30,35,33,117,33,37,24,21,21,43,71,48,60,41,50,92,77,81,87,81,22,19,25,37,0,0,0,0,0,46,9,138,149,260,278,276,268,256,246,227,188,733,732,905,391,357,286,296,296,335,127,525,374,323,272,324,8,8,-8,-8,-315,-273,-220,0,0,0,-193,-193,-193,-193,-193,-193,-193,-193,-193,-193,-193,-193,-193,-193,-220,-193,-193,-193,-220,-220,-220,-220,-220,-220,-220,-220,-220,0,-220,-220,-220,-220,-220,-220,-220,0,-220,-216,-216,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 Nbd7 7. e3 c5 8. Bd3 Qa5 9. Qc2 c4 10. Bf5 O-O 11. O-O Re8 12. Nd2 g6 13. Bxd7 Nxd7 14. f3 f6 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4)} (14... Bf8 15. a3 Nb6 16. b4 cxb3 17. Nxb3 Qa6 18. Nc5 Qc4 19. Rfc1 h6 20. Bf6 Nd7 21. Nxd7 Bxd7 22. Be5 {½-½ (35) Jankovic,A (2591)-Alekseev,E (2632) Tallinn 2016}) 15. Bh6 Bxc3 16. bxc3 Nb6 {[%cal Bd7b6,Bb6a4,Ba4b2][%mdl 32]} 17. e4 {LiveBook: 3 Games} Bd7 18. Rae1 $146 ({Predecessor:} 18. Bf4 Qa4 19. Qb2 Bc6 20. Bc7 Nd7 {1-0 (37) Pjevovic,B (2265)-Vasiljevic,D (2302) Belgrade 2005}) 18... Re6 19. Re3 Qa3 ({Black should play} 19... Rae8 $14) 20. Rfe1 (20. f4 $1 $16) 20... Rae8 $14 21. Nf1 Na4 22. h4 Qb2 23. Qxb2 Nxb2 24. Rb1 Rb6 $1 25. exd5 Kf7 26. Rxe8 Kxe8 27. Nd2 Bf5 28. Ne4 (28. Re1+ $16 Kf7 29. Kh2) 28... Bxe4 $1 $11 29. fxe4 {[%mdl 4096] Endgame KRB-KRN} Na4 $1 30. Rc1 Rb2 31. Bg7 Kf7 32. Bh8 Nb6 33. a4 Nd7 (33... Nxa4 $11 {keeps the balance.} 34. e5 f5) 34. e5 $16 Nb6 (34... fxe5 $16 35. dxe5 (35. Bxe5 Nb6 $11) 35... Nb6) 35. d6 $1 $18 ({Stronger than} 35. Bxf6 Nxd5 36. Bg5 Ke6 $11) 35... fxe5 36. Rf1+ $1 ({Weaker is} 36. Bxe5 Nd5 $11) 36... Ke8 37. dxe5 Rd2 38. Rb1 {Black must now prevent a5.} Nxa4 $2 (38... Rd5 39. e6 Rxd6) 39. Rxb7 Nxc3 40. Rxa7 (40. Bf6 $142 {Intending e6 and mate.} Ne2+ 41. Kf1) 40... Ne4 41. Ra4 ({Not} 41. Rxh7 c3 $18) 41... Rd1+ 42. Kh2 Nd2 43. Kh3 $2 (43. Kg3 $18) 43... h5 $2 {[%mdl 8192]} (43... Nf1 $16) 44. g4 {White threatens e6 and mate.} Nf1 {aiming for ...Rd2.} 45. Kg2 c3 {...c2 is the strong threat.} 46. gxh5 $2 (46. Bf6 $1 $18 {e6 would kill now.} Ne3+ 47. Kf3 hxg4+ 48. Kxe3) 46... c2 $132 {[%mdl 2048] Black has counterplay} 47. Ra8+ Kd7 48. Ra7+ $2 {[%mdl 8192]} (48. e6+ $1 $11 Kxe6 49. Bb2 gxh5 50. Kf2) 48... Ke6 $19 49. Re7+ {[#]} Kf5 $2 ({Black should try} 49... Kd5 $1 $19 50. Rc7 Ne3+ 51. Kg3 gxh5) 50. Rc7 $1 $11 {Strongly threatening hxg6.} gxh5 51. Kf2 $2 (51. Bf6 $11 {and White is okay.}) 51... c1=Q $19 52. Rxc1 Rxc1 53. d7 Rd1 54. Bf6 Rxd7 55. Kxf1 {[#] KR-KB} Rd2 $1 56. Ke1 Rc2 57. Kd1 Rg2 58. Kc1 Ke6 59. Kd1 Kd5 60. Kc1 Rf2 61. Kd1 Ke4 62. Kc1 Kd3 63. Bg5 Kc3 {[%cal Rf2f1]} 64. Kd1 Kd3 {[%cal Rf2f1]} 65. Kc1 Re2 66. Bf6 Re4 67. Kb2 Rb4+ 68. Kc1 Re4 69. Kb2 $1 Re1 70. Bg7 Re4 $2 {Precision: White = 52%, Black = 53%.} (70... Re2+ $19 71. Kb3 Kd4) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Cruz, Cristhian"]
[Black "Sanchez, Sebastian Felipe"]
[Result "1/2-1/2"]
[ECO "E56"]
[WhiteElo "2558"]
[BlackElo "2388"]
[Annotator "TA"]
[PlyCount "46"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,46,13,0,9,17,10,11,6,0,24,0,0,0,0,-22,-18,-16,0,-37,-33,-40,-39,-42,-31,-34,-34,-62,-64,-43,18]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 7. O-O Nc6 8. a3 Ba5 9. h3 dxc4 {E56: Nimzo-Indian: Rubinstein: Main Line: 7...Nc6} (9... Re8 10. cxd5 exd5 11. dxc5 Bxc3 12. bxc3 Qa5 13. Rb1 Qxc5 14. Rb5 Qe7 15. c4 a6 16. Rxd5 Nxd5 17. cxd5 Ne5 18. Nxe5 Qxe5 {1-0 (39) Wang,H (2732)-Hou,Y (2612) Danzhou 2011}) 10. Bxc4 {LiveBook: 26 Games} cxd4 11. exd4 h6 {The position is equal.} 12. Be3 Bd7 $146 ({Predecessor:} 12... Bc7 13. Rc1 Bd7 14. b4 Ne7 15. Ne5 Ned5 16. Qe2 Bc6 17. Nxc6 bxc6 18. Nxd5 Nxd5 19. Bxd5 cxd5 {1-0 (44) Lutsko,I (2335)-Travkina,A (2161) Voronezh 2012}) 13. Rc1 (13. b4 $5 {[%cal Rb4a5]} Bb6 14. d5 exd5 15. Bxb6 (15. Nxd5 Nxd5 16. Bxd5 Bxe3 $11) 15... axb6 16. Nxd5 $11) 13... Rc8 14. Ba2 Ne7 {[%cal Bc6e7,Be7d5,Bd5c3][%mdl 32]} 15. Bb1 Bc6 16. b4 Bb6 17. Ne5 Ned5 18. Ne2 Bb5 {Black is slightly better.} 19. Rxc8 Qxc8 20. Qd2 Bxe2 21. Qxe2 Nc3 22. Qf3 Nxb1 23. Rxb1 Qc2 {Precision: White = 31%, Black = 64%.} (23... Qc3 $15) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Bacallao Alonso, Yusnel"]
[Black "Pulvett Marin, Daniel"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2554"]
[BlackElo "2437"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,98,-5,-8,-6,0,-8,32,0,0,3,18,14,17,0,29,29,35,32,75,20,20,16,21,18,16,20,24,25,67,11,127,134,335,336,329,328,328,329,329,329,326,326,326,326,326,326,314,48,53,56,64,43,46,43,53,57,59,41,112,85,112,112,104,105,103,100,93,100,110,109,134,135,155,152,149,141,231,233,241,243,243,242,517,500,488]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Nbd2 O-O 5. g3 c5 6. Bg2 cxd4 7. Nxd4 Nc6 8. Nc2 Be7 9. O-O {E00: Catalan Bogo-Indian (3 g3 Bb4+)} d5 (9... b6 10. b4 Bb7 11. Bb2 d5 12. a3 dxc4 13. Nxc4 Qc7 14. Rc1 Rad8 15. Qe1 b5 16. Nd2 Qb8 {1-0 (38) Le,Q (2676)-Margvelashvili,G (2531) New York 2015}) 10. b3 b6 $146 ({Predecessor:} 10... Qc7 11. Bb2 Rd8 12. Qe1 e5 13. Rc1 {0-1 (30) Vrsek,I (2248)-Srbis,J (2264) Zagreb 2012}) 11. Bb2 {White is slightly better.} Ba6 12. Ne3 dxc4 13. Ndxc4 Rc8 14. Rc1 Bc5 15. a3 Qxd1 16. Rfxd1 Rfd8 17. Rxd8+ ({Better is} 17. Bxc6 $1 $16 Rxd1+ 18. Rxd1 Rxc6 19. Rd8+ Bf8 20. Ra8) 17... Nxd8 $11 18. Kf1 Kf8 19. Rd1 Ke7 20. b4 Bxe3 21. Nxe3 Ne8 22. Ke1 (22. a4 $14 Bb7 23. f3) 22... f6 (22... Bb5 $11) 23. a4 $1 $36 {[%mdl 2048] Black must now prevent b5. Keeping Black busy.} Bc4 $2 (23... b5 $16 {is a better defense.}) 24. b5 $1 $18 Nd6 25. Ba3 N8f7 26. Bb7 Rc7 27. Bc6 Bb3 28. Rd3 Ba2 29. Rd2 Bb3 30. Rb2 Bxa4 {[#] and if ...a6! works, Black does fine.} 31. Rb4 $2 (31. Nc4 $1 $18) 31... Rxc6 $14 32. bxc6 Bxc6 33. Rg4 g5 34. Rd4 {[%mdl 1024] And now Nc4 would win. White has compensation.} b5 35. Bb4 Kd7 36. Ng4 e5 {[#]} (36... f5 $14 37. Nf6+ Kc7) 37. Rd1 $1 $16 Ke6 38. Ra1 f5 39. Ne3 f4 40. Nc2 Be4 41. Kd1 Nc8 42. Bc5 Kd5 43. Bxa7 Kc4 44. f3 Bg6 45. Bf2 Kb3 (45... Ncd6 $16 {was necessary.} 46. Ra3 e4) 46. Rb1+ $18 Kc3 47. Be1+ Kc4 48. Na3+ Kc5 $2 (48... Kd5 {was called for.}) 49. Rc1+ Kd5 {Precision: White = 72%, Black = 33%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Vasquez Schroeder, Rodrigo"]
[Black "Ynojosa Aponte, Felix Jose"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "2553"]
[BlackElo "2395"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,74,29,29,25,43,26,26,26,26,26,26,26,29,14,20,0,54,0,8,-4,-19,-69,-56,-58,-61,-55,-64,-110,-100,-97,-94,-94,-27,-120,-110,-180,-162,-178,-168,-197,-198,-192,-198,-237,-132,-177,-159,-164,-168,-242,-230,-210,-222,-281,-266,-292,-291,-354,-383,-1424,-1454,-12829,-5708,-29991,-29992]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. O-O Nge7 5. d4 cxd4 6. Nxd4 Qb6 7. Nxc6 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6} bxc6 8. Bd3 Ng6 9. c4 {[%cal Bc2c4,Bc4c5][%mdl 32] White has an edge.} Bc5 10. Nc3 Qc7 11. Na4 $146 ({Predecessor:} 11. Rb1 Rb8 12. a3 d6 13. b4 Bb6 14. Kh1 e5 {1-0 (43) Shirov,A (2702)-Kuzubov,Y (2639) Kishinev 2014}) 11... Bd4 12. c5 O-O 13. Kh1 e5 (13... d6 $11) 14. Bc4 (14. Be3 $1 $14) 14... d6 15. f4 Be6 ({Don't play} 15... dxc5 $6 16. f5 $16) 16. Qd3 Bxc4 17. Qxc4 {[#]} d5 $1 {[%mdl 512]} 18. exd5 cxd5 19. Qd3 Qc6 $36 {[%mdl 2048] Black is on the roll.} 20. Qd1 f6 21. Bd2 e4 (21... Rfe8 $17 22. a3 Rab8) 22. Bc3 (22. Ba5 $1 $11 {keeps the balance.} Be3 23. Qb3) 22... Be3 $17 ({Inferior is} 22... Bxc5 23. Rc1 $11) 23. g3 (23. Bd4 $17 Bxf4 24. Nc3) 23... Rab8 ({And not} 23... Bxc5 24. Rc1 $11) 24. Bd4 Bxd4 25. Qxd4 Ne7 26. f5 Rfd8 27. Rad1 Qb7 ({Better is} 27... Qe8 $19 {And now ...Nc6 would win.} 28. Rf4 Nc6) 28. b3 Nc6 29. Qe3 Qe7 30. Qf4 (30. Rf4 {might work better.}) 30... d4 31. Rfe1 e3 32. Kg2 g6 33. fxg6 hxg6 34. Nb2 Ne5 {[#] aiming for ...Qb7+.} 35. Rxd4 $2 (35. Kg1 Qxc5 36. Nd3 Nxd3 37. Rxd3) 35... Rxd4 $19 36. Qxd4 Qb7+ 37. Kh3 Kg7 {Precision: White = 35%, Black = 72%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Ramirez, Alejandro"]
[Black "Bruzon Batista, Lazaro"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2552"]
[BlackElo "2650"]
[Annotator "TA"]
[PlyCount "42"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,42,2,0,6,0,5,-7,0,0,-1,-2,-5,-7,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 O-O 9. d4 Bf6 10. Re1 Re8 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4} 11. Rxe8+ (11. c3 Rxe1 12. Qxe1 Ne8 13. Bf4 d5 14. Bd3 g6 15. Nd2 c6 16. Nf3 Ng7 17. Qe2 Bf5 18. Bxf5 Nxf5 {½-½ (64) Topalov,V (2741)-So,W (2822) Shamkir 2017}) 11... Nxe8 12. c3 d5 13. Bd3 c6 14. Bf4 g6 15. Nd2 {LiveBook: 9 Games. The position is equal.} Ng7 16. Nf3 Bf5 17. Be5 Bxd3 18. Bxf6 Qxf6 19. Qxd3 {[#]} Re8 $146 20. Re1 Rxe1+ 21. Nxe1 Qe7 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Morovic Fernandez, Ivan"]
[Black "Fernandez Reyes, Lisandro"]
[Result "0-1"]
[ECO "B04"]
[WhiteElo "2537"]
[BlackElo "2402"]
[Annotator "TA"]
[PlyCount "196"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,196,47,40,74,72,79,55,65,64,78,75,89,40,44,41,41,37,79,53,43,24,56,65,56,38,45,0,39,37,41,0,10,7,14,-50,-49,-54,-43,-46,-43,-45,-42,-69,-67,-60,-41,-33,-37,-64,-55,-83,-33,-38,0,-63,44,-87,11,0,0,-128,-125,-208,-102,-155,-40,-39,-22,-22,-20,-27,-21,-21,-21,-33,-33,-72,-72,-72,-71,-71,-71,-71,-71,-70,-70,-80,-87,-82,-79,-798,-798,-772,-770,-775,-749,-724,-607,-798,-798,-777,-777,-712,-751,-609,-609,-607,-592,-606,-606,-592,-595,-589,-581,-586,-586,-585,-554,-527,-520,-458,-390,-579,-564,-531,-522,-1362,-1335,-1195,-1243,-1658,-1397,-2121,-2066,-1610,-1160,-29952,-29954,-29958,-29961,-29961,-29957,-29960,-29955,-29963,-29966,-29964,-29961,-29961,-29961,-29958,-29959,-29958,-5441,-29956,-29956,-29952,-29955,-29955,-29957,-29959,-29952,-29958,-29961,-29957,-29961,-29955,-29953,-29967,-29968,-29967,-29969,-29968,-29970,-29970,-29971,-29970,-29971,-29970,-29970,-29969,-29971,-29961,-3670,-29979,-29973]} 1. e4 {[%cal Be2e4,Be4e5][%mdl 32]} Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. Qe2 d5 {B04: Alekhine's Defence: 4 Nf3} (7... O-O 8. h3 Nc6 9. O-O dxe5 10. dxe5 Nd4 11. Nxd4 Qxd4 12. Re1 Be6 13. Nd2 Bxb3 14. axb3 a6 15. Nf3 Qd5 16. Bg5 Rfe8 17. Rad1 {1-0 (45) Zhigalko,S (2655)-Tukhaev,A (2564) Minsk 2015}) 8. Bf4 Bf5 $146 ({Predecessor:} 8... Bg4 9. Nbd2 a5 10. c3 a4 11. Bc2 e6 12. O-O O-O 13. h3 Bxf3 14. Nxf3 c5 15. h4 cxd4 16. cxd4 {½-½ (76) Deev,A (2400)-Luethgens,E (2305) Germany 1998}) 9. Nbd2 Nc6 {White is slightly better.} 10. a4 a5 11. c3 h6 12. O-O g5 13. Be3 e6 14. Ne1 {[%cal Bf3e1,Be1g2,Bg2h4][%mdl 32]} Ne7 15. g4 Bg6 16. Ng2 h5 17. Bxg5 hxg4 18. Qxg4 Qd7 19. Nh4 Bh5 20. Qg3 O-O-O 21. Kh1 Rdg8 22. Rg1 Ng6 23. Bc2 (23. Qe3 $11) 23... Bxe5 $1 $15 24. dxe5 {Black must now prevent Bf6.} Nxh4 25. Qxh4 Bg6 26. Qd4 {Hoping for Bxg6.} Bxc2 27. Bf6 Rxg1+ 28. Rxg1 Re8 29. b3 Kb8 30. Rg7 Bg6 31. h4 Qc8 32. Kh2 c5 33. Qf4 (33. Qe3 $11) 33... d4 (33... c4 $1 $15 34. bxc4 Qc5) 34. c4 (34. cxd4 $14 Nd5 35. Qg4) 34... Qc6 (34... Nd7 $1 $17) 35. Qg5 Nd7 36. f3 (36. h5 $11 Nxf6 37. exf6) 36... Nxf6 $17 37. Qxf6 (37. exf6 $17 Rh8 38. Kg2) 37... d3 (37... Qb6 $19 {and Black stays clearly on top.} 38. Ne4 d3) 38. Kg3 Qb6 (38... Ka7 $17 39. Kf4 Qb6) 39. Qg5 $15 Qd8 40. Qxd8+ Rxd8 $11 {[%mdl 4096] Endgame KRB-KRN} 41. f4 Rf8 42. Kg4 $1 Rh8 43. Kg3 $1 Ka7 44. Kg4 Kb6 45. Kg3 Kc6 {...Kd7 is the strong threat.} 46. f5 Bxf5 {Threatens to win with ...Bg6.} ({Reject} 46... exf5 $6 47. e6 $1 $11 {[%mdl 512]}) 47. Rxf7 {[#]} Rg8+ $1 48. Kf2 Rg4 $1 49. Nf3 $1 {[#]} Re4 $1 {[%cal Re4e2] aiming for ...Re2+.} 50. Rf8 Kd7 {And now ...Re2+ would win.} 51. h5 $2 {[%mdl 8192]} (51. Rf7+ $17 Ke8 52. Rxb7) 51... Re2+ $19 52. Kg3 d2 53. Nxd2 Rxd2 {KRB-KR} 54. h6 Rd3+ 55. Kf4 {If White can now play h7! this consolidates a bit.} Rh3 56. Kg5 Rg3+ 57. Kf4 Rg4+ 58. Kf3 Rh4 59. Rf7+ Kc6 60. Rf6 b6 61. Kg3 Rh3+ 62. Kg2 {intending Rxf5!} Rh5 63. Kg3 Kd7 64. Rf7+ Ke8 65. Rb7 Rxh6 66. Rxb6 Kd7 67. Rb5 (67. Kf2 {was the only defense.}) 67... Kc6 68. Kf4 Rh3 69. Kg5 Bc2 70. Rxa5 Rxb3 71. Kf6 Bf5 72. Ra8 Rb4 73. Rc8+ Kd7 74. Rxc5 Rxa4 75. Kf7 Bd3 76. Rb5 Bxc4 77. Rb6 Bd5 78. Rd6+ Kc7 79. Ke7 Ra3 80. Rd7+ Kc6 81. Rd8 Kc5 82. Rg8 Kd4 (82... Re3 $142 83. Kf6 Kd4 84. Rg4+ Re4 85. Rg1 Rf4+ 86. Ke7 Kxe5 87. Re1+ Kf5 88. Kd6 Be4 89. Rc1 Rf3 90. Kc5 Kf4 91. Rc4 e5 92. Ra4 Rd3 93. Rb4 Kf5 94. Rb2 Bd5 95. Rb8 e4 96. Rf8+ Ke5 97. Re8+ Be6 98. Rh8 e3 99. Rh1 Bg4 100. Ra1 e2 101. Kc6 Rd1 102. Ra5+ Kf6 103. Ra6 e1=Q 104. Kb7+ Ke5 105. Rg6 Qb4+ 106. Kc7 Rd7+ 107. Kc6 Qb7+ 108. Kc5 Rc7+ 109. Rc6 Rxc6#) 83. Rg5 Ke4 84. Rh5 Kf4 85. Kf6 Bf3 86. Rh3 Ra2 87. Rh4+ Bg4 88. Rh1 Rf2 89. Re1 Rf3 90. Re2 Rf1 91. Rg2 Kf3 92. Rb2 Ke4+ 93. Kg5 Bd1 94. Rb5 Rf5+ 95. Kg6 Rxe5 96. Rb1 Bg4 97. Kf6 Rd5 (97... Rf5+ $142 98. Kg7 e5 99. Rg1 Kf4 100. Rf1+ Bf3 101. Rc1 e4 102. Rc4 Bh5 103. Ra4 Kf3 104. Ra1 e3 105. Rf1+ Ke4 106. Rh1 e2 107. Ra1 Rf7+ 108. Kh8 Rf1 109. Ra7 e1=Q 110. Rc7 Rf8+ 111. Kh7 Qg3 112. Rg7 Rf7 113. Kh6 Rxg7 114. Kxh5 Rh7#) 98. Kf7 Ke5 {Precision: White = 44%, Black = 70%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Cuartas, Jaime Alexander"]
[Black "Fier, Alexandr"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2492"]
[BlackElo "2576"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,112,8,10,11,8,8,10,7,4,3,17,0,0,-18,-19,-18,-17,-14,-14,-14,-14,-27,-21,-32,-31,-35,-32,-33,-33,-33,-36,-36,-33,-34,-13,-13,-10,-25,-25,-18,-26,-27,-17,-19,-8,-10,0,0,0,0,0,-12,-12,-10,0,0,0,-19,-12,-19,-20,-20,-19,-22,-23,-25,-24,-52,-44,-33,0,0,0,-8,-8,-24,-16,-15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8]} 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 e6 6. Bd3 Be7 7. O-O O-O 8. c4 Qd7 9. dxc5 Rd8 10. Bc2 {B22: Sicilian: 2 c3} Qxd1 11. Rxd1 Rxd1+ 12. Bxd1 Bxc5 (12... Nbd7 13. c6 bxc6 14. Nc3 Bb7 15. b3 c5 16. Bf4 Ne4 17. Nxe4 Bxe4 {½-½ (58) Potapov,P (2474)-Hammer,J (2606) Aix les Bains 2011}) 13. Nc3 b6 14. Ne5 $146 ({Predecessor:} 14. a3 Nbd7 15. b4 Be7 16. Bf4 Bb7 17. Be2 a5 18. bxa5 Rxa5 {½-½ (53) Ferron Garcia,C-Veingold,A (2465) Barcelona 1992}) 14... Bb7 $1 15. Be3 Bxe3 16. fxe3 Nbd7 17. Nxd7 Nxd7 18. Be2 Kf8 19. Rd1 Ke7 20. Kf2 Rc8 21. b3 a6 22. Na4 {Black should prevent Rxd7+!} Bc6 23. Nb2 Nc5 24. Bf3 a5 25. Ke2 Be8 26. Nd3 f5 27. Kd2 g5 28. g3 g4 29. Bg2 h5 30. Kc3 h4 31. gxh4 Bf7 32. Ne5 Kf6 33. Nxf7 Kxf7 $11 {[%mdl 4096] Endgame KRB-KRN} 34. a3 {[#] b4 is the strong threat.} Ke7 35. h5 Rh8 36. Bc6 Rc8 37. Bg2 Nd7 38. h3 gxh3 39. Bxh3 Rh8 40. b4 Rxh5 41. Bf1 Rh1 42. Be2 Rh3 43. Kd2 f4 44. exf4 Rxa3 45. bxa5 bxa5 46. Re1 Nc5 {Hoping for ...Ne4+.} 47. Bg4 {The position is equal.} Rd3+ 48. Kc2 Rd4 49. Bxe6 $1 Rxf4 50. Bd5+ Kd6 51. Rb1 $1 a4 52. Kc3 a3 53. Ra1 Rh4 54. Rxa3 Rh3+ 55. Kb4 Rxa3 56. Kxa3 Nd7 {Precision: White = 70%, Black = 76%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Hungaski, Robert Andrew"]
[Black "Ortiz Suarez, Isan Reynaldo"]
[Result "1-0"]
[ECO "D43"]
[WhiteElo "2492"]
[BlackElo "2570"]
[Annotator "TA"]
[PlyCount "108"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,108,27,47,47,46,46,42,26,31,25,19,5,26,30,50,32,66,34,43,43,39,33,51,51,54,36,54,54,60,32,25,25,25,26,43,28,29,42,45,39,27,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,8,27,33,87,80,87,87,466,422,436,416,635,607,760,737,612,584,954,954,954,954,911,752,6636,11490,5422,4845,2815,2106,29947,10785,29977,29978,29984]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 c6 5. g3 Be7 6. Bg2 O-O 7. O-O Nbd7 8. Nd2 b6 {E07: Closed Catalan: Main Line (5 Nf3 0-0 6 0-0 Nbd7)} 9. e4 {[%cal Be2e4,Be4e5][%mdl 32]} Bb7 {LiveBook: 8 Games} (9... dxc4 10. Nxc4 Ba6 11. b3 b5 12. Ne3 b4 13. Ne2 Nb6 14. Bb2 c5 15. d5 Ne8 16. Re1 exd5 17. exd5 {1-0 (49) Wang,H (2717)-Shomoev,A (2561) Ho Chi Minh City 2016}) 10. cxd5 $146 ({Predecessor:} 10. e5 Ne8 11. f4 Nc7 12. cxd5 cxd5 13. g4 f6 14. Nf3 b5 15. Be3 Nb6 16. b3 {1-0 (34) Kekelidze,M (2516)-Ivanov,M (2447) Cannes 2006}) 10... cxd5 {White is slightly better.} 11. e5 Ne8 12. f4 b5 {[%cal Bb6b5,Bb5b4][%mdl 32]} 13. Nf3 b4 14. Ne2 Nb6 15. g4 f6 16. b3 Nc7 17. Be3 f5 18. gxf5 exf5 19. Qd2 Qd7 20. Ne1 Ba6 21. Nd3 Qb5 22. Rfd1 Rac8 23. Bf1 Qxd3 24. Qxd3 Bxd3 25. Rxd3 Ne6 26. Rd2 g5 27. Bh3 g4 28. Bg2 h5 29. Rc1 Rxc1+ 30. Nxc1 Rc8 31. Ne2 Kf7 32. Rd1 Rc2 33. Rd2 Rc7 34. Rd1 Bf8 35. Rc1 Rxc1+ 36. Nxc1 Bh6 37. Nd3 a5 38. Kf2 Kg6 39. Kg3 Kf7 ({Better is} 39... Nc7 $14) 40. h3 $16 Nc7 41. Nc5 Nb5 $2 {[%mdl 8192] [#]} (41... Bf8 $16 42. Nb7 a4) 42. hxg4 $18 hxg4 43. Na4 Nxa4 (43... Nd7 $142 44. Bxd5+ Ke7) 44. Bxd5+ ({And not} 44. bxa4 Nc3 $17) 44... Ke7 45. bxa4 {[%mdl 4096] Endgame KBB-KBN} Nc3 46. Bc4 Nxa4 47. d5 {[%cal Bd4d5,Bd5d6][%mdl 32]} Nc3 48. d6+ Kd7 49. Bd3 Ne4+ 50. Bxe4 fxe4 51. Bd2 Bf8 52. Kxg4 Ke6 53. Kg5 Bg7 54. f5+ Kxe5 {Precision: White = 73%, Black = 45%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Quintiliano Pinto, Renato R"]
[Black "Valenzuela Gomez, Fernando"]
[Result "0-1"]
[ECO "A48"]
[WhiteElo "2483"]
[BlackElo "2377"]
[Annotator "TA"]
[PlyCount "92"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,92,0,0,0,-25,-22,-27,-34,-39,-38,-99,-100,-120,-113,-111,-126,-121,-111,-122,-109,-151,-154,-157,-155,-149,-114,-99,-107,-119,-121,-100,-98,-112,-112,-114,-96,-271,-256,-311,-289,-295,-200,-200,-200,-261,-252,-254,-234,-217,-214,-214,-160,-165,-165,-168,-169,-216,-216,-232,-232,-222,-225,-232,-154,-232,-232,-216,-216,-254,-208,-641,-625,-29981,-29982,-29984,-29973]} 1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. c3 O-O 5. h3 d6 6. e3 c5 7. dxc5 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} dxc5 8. Qxd8 Rxd8 {[%cal Bf8d8,Bd8d7,Bd7b7,Bb7b5][%mdl 32]} 9. Bc7 Rd7 10. Bh2 {LiveBook: 7 Games} Nc6 $146 ({Predecessor:} 10... Rd8 11. Nbd2 b6 12. a4 Nc6 13. Bc4 Na5 14. Be2 Bb7 {½-½ (29) Perelshteyn,E (2489)-Zhou,J (2630) Atlantic City 2016}) 11. Bb5 (11. Nbd2 {keeps more tension.} b6 12. Bb5 Bb7 13. Nc4 Rd5 14. O-O) 11... a6 12. Bxc6 bxc6 13. Nbd2 Rb7 $1 14. Nc4 (14. Nb3 $15) 14... Be6 $17 15. Nfd2 {[#]} Ne4 $1 {[%cal Re4d2][%mdl 512] Hoping for ...Nxd2.} 16. Nxe4 Bxc4 17. O-O-O Bxa2 18. Nxc5 Rb5 19. Nd3 Bb3 20. Rd2 a5 21. Ne1 a4 {And now ...a3 would win.} 22. Nc2 {[#]} a3 $1 {[%mdl 512]} 23. Nxa3 {[#]} (23. bxa3 Bxc3) 23... Bxc3 $1 {[%mdl 512]} 24. Rd3 {[#]} (24. bxc3 Rxa3) 24... Bf6 $1 $36 {[%mdl 2048] ...Bd5 is the strong threat. Black is in control.} 25. Nxb5 Ra1+ 26. Kd2 Rxh1 27. Nd4 $2 (27. Rxb3 $17 Rxh2 28. Nc3) 27... Bd5 $19 ({Resist} 27... Rxh2 28. Rxb3 Rxg2 29. Ke1 $17) 28. Bg3 Bxg2 29. h4 Bd5 30. Rc3 h5 31. Rc2 Bxh4 32. Bxh4 Rxh4 33. Nxc6 Bxc6 34. Rxc6 {[%mdl 4096] Endgame KR-KR} Rb4 35. Kc3 Rb8 36. b4 Kg7 37. Rc4 g5 38. Kd3 Kg6 39. Ke2 h4 40. Kf3 Rb6 41. Kg2 (41. Kg4 $17) 41... e6 {[%cal Be7e6,Be6e5][%mdl 32]} 42. Kh3 Kh5 43. f3 f5 44. Rd4 $2 (44. Kg2) 44... Rc6 45. b5 Rc2 46. Rb4 e5 {Precision: White = 45%, Black = 80%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Tang, Andrew"]
[Black "Bachmann, Axel"]
[Result "0-1"]
[ECO "A40"]
[WhiteElo "2461"]
[BlackElo "2653"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,112,20,20,22,14,22,10,25,0,0,0,0,16,84,64,78,0,0,0,0,0,0,-83,-84,-73,-35,-29,-3,-14,-11,-41,-35,-35,0,-60,-63,-137,-65,-127,-121,-111,-115,-121,-117,-131,-41,-40,8,-27,0,-70,-95,-140,-140,-142,-85,-86,-103,-101,-102,-102,-100,-96,-77,-77,-76,-77,-79,-77,-18,-51,-24,-24,-24,-80,-80,-80,-95,-74,-74,-88,-83,-166,-153,-954,-791,-679,-275,-1379,-980,-2312,-2312,-29974,-29974]} 1. d4 g6 2. Bf4 Bg7 3. Nf3 Nf6 4. e3 O-O 5. h3 d6 6. Be2 b6 7. O-O c5 8. c3 Bb7 9. Nbd2 Nbd7 10. a4 a6 11. Qb3 Rc8 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} 12. Rfd1 Rc7 13. Bh2 Qa8 {The position is equal.} 14. c4 cxd4 $1 15. exd4 Re8 16. a5 $146 ({Predecessor:} 16. Bf1 Rcc8 17. d5 a5 18. Qe3 e6 19. dxe6 Rxe6 20. Qb3 {0-1 (51) Pham,L (2319)-Ehlvest,J (2535) Berlin 2015}) 16... bxa5 (16... b5 $1 $11 {remains equal.}) 17. Rxa5 $16 e5 18. c5 (18. dxe5 $16 dxe5 19. Qa3) 18... exd4 $1 $11 19. cxd6 Rc5 20. Rxc5 Nxc5 21. Qc4 (21. Qa3 $11) 21... Nfd7 $1 $36 {[%mdl 2048] Black has strong initiative.} 22. Bf1 Bd5 23. Qb4 Rb8 24. Qa3 Qb7 25. Bc4 (25. Ne5 $5) 25... Bxc4 26. Nxc4 Qe4 27. Nfd2 (27. b4 $11 Qe2 28. Re1 Qxc4 29. bxc5) 27... Qc2 $15 28. Qf3 {[#]} (28. Rf1 $15) 28... Bh6 (28... Rb4 $1 $17 29. Re1 Rxc4 30. Nxc4 Qxc4) 29. Bg3 (29. Ne5 $1 $15 Nxe5 30. Bxe5) 29... Bxd2 30. Nxd2 Rxb2 31. Kh2 Rb8 32. Bf4 Re8 ({Better is} 32... a5 $17 33. Bh6 Ne6) 33. Bh6 $1 Qa4 34. Rc1 Qb5 35. Ne4 (35. Rb1 $11 Qe2 36. Qxe2 Rxe2 37. Nb3 Nxb3 38. Rxb3) 35... Ne6 $1 ({Much worse is} 35... Nxe4 $6 36. Qxe4 Qe5+ 37. Qxe5 $11) 36. Nf6+ Nxf6 37. Qxf6 {Black must now prevent Rc7!} Qd7 (37... Qd5 $142 38. Qe7 Rd8) 38. Bf4 $17 Nxf4 39. Qxf4 {[%mdl 4096] Endgame KQR-KQR} Re6 {Threatens to win with ...d3.} 40. Qxd4 {White wants to play Rd1.} Rxd6 41. Qe5 h5 42. Rb1 Rc6 43. Rb8+ Rc8 44. Rb6 Ra8 ({Black should play} 44... Re8 $17 45. Qc3 Qa4) 45. Rd6 Qf5 (45... Qb5 {seems wilder.} 46. Qd4 a5 47. Rb6 Qe8 48. f4 a4) 46. Qxf5 gxf5 $11 {KR-KR} 47. Kg3 {[#]} (47. Rd4 $11) 47... a5 $1 $17 {[%cal Ba6a5,Ba5a4,Ba4a3,Ba3a2][%mdl 32]} 48. Kf4 a4 49. Kxf5 a3 50. Rd1 Kg7 51. Kg5 (51. Ra1 $17 {was called for.}) 51... Ra5+ $19 52. Kh4 $2 (52. Kf4 $17) 52... a2 53. Ra1 Kg6 (53... Kf6 $142 54. f3 Ke6) 54. g4 $2 (54. Kg3 Ra3+ 55. Kf4) 54... Ra4 55. f4 hxg4 56. hxg4 Ra3 {Precision: White = 25%, Black = 46%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Valderrama Quiceno, Esteban Alb"]
[Black "Shabalov, Alexander"]
[Result "1/2-1/2"]
[ECO "A41"]
[WhiteElo "2413"]
[BlackElo "2556"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,62,1,12,4,6,4,20,0,17,0,4,1,1,0,0,0,8,-6,0,-4,22,11,20,22,72,66,68,67,84,85,96,85,94,90,118,0,84,91,96,79,84,69,97,66,66,41,54,40,42]} 1. Nf3 d6 2. d4 Bg4 3. e4 Nf6 4. Nc3 e6 5. Be2 Be7 6. O-O O-O 7. Be3 d5 8. exd5 exd5 9. Re1 $146 {A41: 1 d4 d6: Tartakower System and Modern Defence} ({Predecessor:} 9. Ne5 Bxe2 10. Nxe2 Nbd7 11. Ng3 Bd6 12. Bf4 Re8 13. Nd3 Bxf4 14. Nxf4 Nf8 15. Re1 Rxe1+ 16. Qxe1 Qd6 17. Nd3 Re8 18. Qa5 Qb6 {½-½ (18) Andersson,U (2625)-Speelman,J (2630) Lyon 1991}) 9... c6 10. h3 Bf5 (10... Bxf3 $5 11. Bxf3 Bd6 $11) 11. Bd3 {The position is equal.} (11. Nh4 $5 {[%cal Rh4f5]} Be6 12. Nf3 $11) 11... Bg6 12. Ne5 Nbd7 {[%cal Bb8d7,Bd7f8,Bf8e6][%mdl 32]} 13. Nxg6 hxg6 14. Bf4 Re8 15. Ne2 Nf8 16. c3 Ne6 17. Be5 $36 {[%mdl 2048] Black is under pressure.} Nh5 18. Ng3 Nhf4 19. Bc2 Bg5 20. Qg4 Bh6 21. h4 Qb6 ({Avoid the trap} 21... f5 $2 {[#]} 22. Bxf5 $1 {[%mdl 512]} gxf5 23. Nxf5 $18) 22. Rab1 c5 23. dxc5 Qxc5 24. Rbd1 Qb5 25. Rb1 (25. Bb3 $16) 25... Rac8 (25... Qc5 $11) 26. h5 $16 gxh5 27. Nxh5 Nxh5 28. Qxh5 d4 {next ...d3 is good for Black.} 29. a4 Qc5 {White is slightly better.} 30. Qf3 dxc3 31. Bxc3 Nd4 {Precision: White = 49%, Black = 61%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Valdes Romero, Leonardo"]
[Black "Mekhitarian, Krikor Sevag"]
[Result "1-0"]
[ECO "A46"]
[WhiteElo "2407"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,94,2,-8,6,0,21,21,24,20,125,120,119,112,127,126,135,110,131,131,137,127,186,155,312,210,393,393,398,397,390,251,243,243,243,251,250,252,245,249,250,250,288,287,295,302,302,293,311,313,310,304,290,196,196,196,196,196,196,196,383,383,383,383,383,383,523,316,607,383,531,312,495,294,733,697,1006]} 1. d4 Nf6 2. Nf3 e6 3. g3 d5 4. Bg2 b5 5. O-O Be7 6. b3 Nbd7 7. c4 c6 8. Qc2 O-O 9. Nbd2 bxc4 10. bxc4 Ba6 11. Re1 Bb4 {E09: Closed Catalan: Main Line: 7 Qc2 c6 8 Nbd2} (11... Rb8 12. c5 Re8 13. Bb2 Bf8 14. Bc3 g6 15. e3 Bg7 16. Rab1 Rxb1 17. Rxb1 Qa8 18. Bf1 Bxf1 19. Kxf1 {½-½ (48) Ruck,R (2572)-Duda,J (2587) Ruzomberok 2014}) 12. Rb1 Ba5 $146 ({Predecessor:} 12... c5 13. cxd5 Nxd5 14. dxc5 Bxc5 15. Bb2 Bb4 16. e4 Rc8 17. Qa4 Nc5 18. Qd1 Nc3 19. Bxc3 Bxc3 {0-1 (35) Uusi,G-Kremenietsky,A Parnu 1973}) 13. Ba3 Re8 $1 {The position is equal.} 14. Rec1 Rc8 {[#]} (14... Nb6 $11) 15. Qa4 $1 $16 {Black must now prevent Nb3.} dxc4 16. Nxc4 Bxc4 17. Qxc4 Bb6 18. Rc2 h6 19. e3 c5 {[#]} 20. Rbc1 $1 (20. dxc5 $6 Bxc5 21. Bb2 (21. Bxc5 Rxc5 22. Qd3 Qc7 $11) 21... Be7 $14) 20... Rc7 (20... e5 $16 {was called for.} 21. Nxe5 (21. dxc5 Bxc5 22. Qe2 Qb6 $14) 21... Nxe5 22. dxe5 Rxe5) 21. Qa4 {[%cal Rd4c5]} ({Don't play} 21. dxc5 $6 Bxc5 22. Bb2 Bd6 $14) 21... Qc8 $2 (21... cxd4 $16 {might work better.} 22. Rxc7 (22. Nxd4 Rxc2 23. Rxc2 Bxd4 $14) 22... Bxc7) 22. Ne1 e5 $2 (22... cxd4 23. Rxc7 (23. exd4 Rxc2 24. Rxc2 Qd8 $14) 23... Bxc7) 23. dxc5 $18 Nxc5 24. Bxc5 Bxc5 25. Nd3 {[%cal Rc2c5]} Bb6 26. Rxc7 Bxc7 27. Qxa7 Bb8 28. Rxc8 Bxa7 29. Rxe8+ Nxe8 30. Nxe5 {[%mdl 4096] Endgame KBN-KBN} Nd6 31. a4 {[%cal Ba2a4,Ba4a5,Ba5a6][%mdl 32]} f6 32. Nc6 Bc5 33. a5 Kf8 34. a6 Nb5 35. Bf1 Na7 36. Nxa7 Bxa7 {KB-KB} 37. Kg2 Ke7 38. Bd3 Ke6 39. Kf3 f5 $2 (39... Kd6 {was necessary.} 40. Kg4 Ke7) 40. h3 {[%cal Bh2h3,Bh3h4][%mdl 32]} Ke5 41. h4 Bb6 42. Bb5 Ba7 43. Ke2 Bb6 $2 (43... Kd6 44. Bd3 g6) 44. Kd3 Ba7 45. Ba4 Bb6 (45... Kd6 $142 46. Ke2 Kc5) 46. Bc2 (46. h5 $142 Kd5 47. Bd7) 46... Ba7 $2 (46... g5 47. f4+ gxf4) 47. h5 Bb6 {Precision: White = 76%, Black = 22%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Cori Quispe, Kevin Joel"]
[Black "Flores, Diego"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2390"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,84,85,76,90,49,52,52,52,39,51,29,45,25,65,27,66,27,36,16,31,6,5,8,35,9,12,0,0,14,6,-12,0,0,39,0,17,6,14,15,6,-14,-20,-32,9,12,6,0,0,0,0,0,0,0,0,0,0,-48,-40,-51,-51,-50,-51,-64,-31,-29995,-29996,-29996,-29997]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 c6 6. Bc4 Bf5 7. Bd2 e6 8. Nd5 Qd8 9. Nxf6+ gxf6 10. c3 {LiveBook: 103 Games} Bg7 {B01: Scandinavian Defence} (10... Nd7 11. Nh4 Nb6 12. Bb3 Bd3 13. Qf3 Bc4 14. O-O-O Be7 15. Rhe1 Qd5 16. Qxd5 cxd5 17. Bf4 a5 18. Kb1 Bxb3 19. axb3 {½-½ (36) Cheparinov,I (2670)-Bauer,C (2634) Kemer 2007}) 11. Qe2 $146 ({Predecessor:} 11. h3 Nd7 12. O-O Bg6 13. Re1 O-O 14. Nh4 f5 15. Nxg6 hxg6 16. Qc1 Qh4 {½-½ (35) Rohler,S (2176)-Fabisch,C (2122) Austria 2015}) 11... Nd7 12. O-O O-O {White is slightly better.} 13. Bf4 Re8 14. Rad1 Bg6 15. Rfe1 Qa5 16. h3 Rad8 17. Bg3 Bh5 18. Qe3 Nb6 19. Bb3 Qf5 20. Nh4 {[%cal Bf3h4,Bh4f5,Bf5d6,Bd6e4,Be4g3,Bg3e2][%mdl 32]} Qb5 21. f3 (21. Ra1 {with more complications.} a5 22. Bc2 Nd5 23. Qc1 Qb6 24. a4) 21... a5 {[%cal Ba7a5,Ba5a4,Ba4a3][%mdl 32]} 22. Qe2 Qxe2 23. Rxe2 a4 24. Bc2 {[#] And now Bc7 would win.} Rd7 25. Nf5 a3 (25... Ra8 $5 {[%cal Re6f5]}) 26. Nd6 Red8 27. Ne4 $1 axb2 28. Bb3 Nd5 29. Be1 (29. Bxd5 $5 Rxd5 30. Bh4 $11 (30. Rxb2 f5 $11)) 29... b6 30. Rxb2 f5 31. Ng3 Bg6 32. Ne2 Ne3 33. Ra1 c5 $36 {[%cal Rc5d4][%mdl 2048] Black has the initiative.} 34. Bh4 cxd4 35. cxd4 ({Wrong is} 35. Bxd8 $2 dxc3 36. Rbb1 Rxd8 $19) 35... Rxd4 36. Nxd4 Rxd4 37. Bf2 Rd3 38. Rab1 Bxb2 39. Rxb2 f4 40. Bh4 Rc3 {aiming for ...Rc1+.} 41. Bf6 $2 {[%mdl 8192] [#]} (41. Rd2 $15) 41... Rc1+ 42. Kf2 Bd3 {Precision: White = 27%, Black = 63%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Rios Parra, Alejandro"]
[Black "Garcia Pantoja, Roberto"]
[Result "1/2-1/2"]
[ECO "B93"]
[WhiteElo "2345"]
[BlackElo "2500"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,116,-10,-17,-31,0,0,8,0,8,0,0,0,5,6,12,-29,-12,-29,-11,-20,-4,-7,-7,-36,-26,-72,-65,-97,-89,-92,-81,-101,-65,-75,-66,-66,-75,-100,-51,-59,-50,-85,-85,-83,-83,-83,-83,-81,-7,-6,-3,-14,0,0,0,-7,-7,-7,-7,-106,-10,-32,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Nbd7 8. Bd3 Be7 9. O-O O-O 10. Kh1 b5 11. Qe1 {B93: Sicilian Najdorf: 6 f4} (11. a4 b4 12. Ne2 Bb7 13. Ng3 Nc5 14. fxe5 Nfxe4 15. Nf5 dxe5 16. Nxe5 Bf6 17. Ng4 Bg5 18. Be3 h5 {0-1 (35) Ponkratov,P (2603)-Kokarev,D (2612) Voronezh 2010}) 11... Rb8 12. fxe5 dxe5 13. Bg5 Re8 $146 ({Predecessor:} 13... h6 14. Bd2 Re8 15. a4 b4 16. Ne2 Bf8 {½-½ (16) Rios Parra,A (2304)-Garcia Pantoja,R (2464) Medellin 2016}) 14. a4 {[%cal Ra4b5]} b4 15. Nd1 h6 16. Bxf6 Nxf6 17. b3 Bc5 $36 {[%mdl 2048] Black fights for an advantage.} 18. Ne3 Be6 19. Qe2 Qc7 (19... Qb6 $5 {[%cal Rc5e3]} 20. Rae1 Bg4 $11) 20. Nh4 Bxe3 21. Qxe3 Nd7 22. Rf3 Nc5 23. Rg3 {[#] aiming for Qxh6.} Nxd3 24. cxd3 Kh7 25. d4 Qd8 26. Nf3 exd4 27. Nxd4 Rc8 28. Qf2 Qc7 29. Rf1 Qe5 30. Nf5 Bxf5 31. Qxf5+ Qxf5 32. exf5 $17 {[%mdl 4096] Endgame KRR-KRR} Rc5 33. h3 Ree5 (33... h5 $17) 34. Rf4 $1 $11 Rxf5 35. Rxb4 g5 36. Rb6 a5 37. Rf3 Rxf3 38. gxf3 {KR-KR} Rc2 39. b4 {[#]} (39. f4 $11) 39... axb4 ({Black should try} 39... Rf2 $1 $17 {And now ...axb4 would win.} 40. bxa5 Rxf3) 40. Rxb4 Rf2 41. f4 {The position is equal.} f5 ({Don't blunder} 41... Rxf4 $2 42. Rxf4 gxf4 43. a5 $18) 42. fxg5 hxg5 43. Rb6 Ra2 (43... Rf3 $5 {[%cal Rf3h3]} 44. Kg2 Ra3 $11) 44. Ra6 Kg7 45. Kg1 f4 46. a5 {[%cal Ba4a5,Ba5a6][%mdl 32]} Kf7 47. Kh1 f3 {( -> ...Ra1+)} (47... Ra3 $5 {[%cal Ra3h3]} 48. Kg2 Rg3+ 49. Kh2 Ra3 $11) 48. Kg1 Rg2+ 49. Kf1 Rh2 50. Rb6 Rxh3 51. a6 g4 52. Rb4 Rh1+ 53. Kf2 Rh2+ 54. Kf1 Ra2 55. Rxg4 Rxa6 56. Rf4+ Rf6 57. Rxf6+ Kxf6 58. Kf2 Ke5 {Precision: White = 58%, Black = 60%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.16"]
[Round "9"]
[White "Mendoza, Rafael"]
[Black "Barrientos, Sergio E"]
[Result "1/2-1/2"]
[ECO "A17"]
[WhiteElo "2293"]
[BlackElo "2463"]
[Annotator "TA"]
[PlyCount "109"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,109,22,22,16,14,-31,-18,-18,8,8,8,0,14,0,0,0,0,12,6,0,19,0,12,18,28,20,32,17,16,-6,31,4,36,10,2,11,4,7,26,0,-4,0,-3,-46,-31,-108,-139,-123,-128,-108,-121,-114,-60,-65,-60,-66,-69,-58,0,0,0,-23,-25,-26,0,0,0,-10,-8,-8,0,-17,-17,-17,433,433,433,-599,426,426,896,1131,1131,1092,968,637,670,637,637,144,144,0,0,0,0,0,0,0,0,0,0,8]} 1. c4 Nf6 2. Nc3 e6 3. Nf3 Bb4 4. Qc2 d6 (4... O-O 5. a3 Bxc3 6. Qxc3 a5 7. b4 d6 8. Bb2 e5 9. g3 Bd7 10. Bg2 Qc8 11. O-O Bh3 12. d3 Bxg2 13. Kxg2 Qd7 14. b5 {0-1 (50) Melkumyan,H (2653)-Eljanov,P (2741) Germany 2016}) 5. e3 O-O 6. Be2 {A17: English Opening: 1...Nf6 with ...Bb4} e5 7. a3 Bxc3 $1 8. Qxc3 c5 9. d3 a5 10. b3 Nc6 11. Bb2 Bg4 12. O-O Re8 13. Rfe1 $146 ({Predecessor:} 13. Rfd1 Qe7 14. h3 Bh5 15. Qe1 Rad8 16. Nd2 Bxe2 17. Qxe2 b6 18. Ne4 d5 19. cxd5 {½-½ (19) Iturrizaga Bonelli,E (2613)-Perez Ponsa,F (2533) Montevideo 2015}) 13... Rb8 14. Qc2 h6 15. Rad1 Qc8 16. h3 Bf5 17. Bf1 b5 18. Nd2 Bg6 19. Ba1 Qe6 20. Ne4 Ne7 21. Nxf6+ Qxf6 22. Qd2 b4 23. axb4 axb4 24. d4 Nc6 $36 {[%mdl 2048] Black fights for an advantage.} 25. dxc5 dxc5 26. Qb2 Ra8 27. f4 (27. Qc1 $15) 27... Be4 $17 28. Bd3 Bxd3 ({Don't do} 28... exf4 29. Qxf6 gxf6 30. Bxe4 $15) 29. Rxd3 {[#]} Qg6 $1 {[%cal Rg6d3]} 30. Red1 f6 ({Black should try} 30... exf4 $17 31. Rd6 Qg3 32. Rxc6 fxe3 33. Qxg7+ (33. Qe2 $2 Ra2 $19) 33... Qxg7 34. Bxg7 Kxg7 35. Rxc5 Ra3) 31. Rd6 $15 Qe4 32. Qf2 $1 exf4 (32... Ra3 {keeps more tension.} 33. fxe5 Nxe5 34. Bxe5 Rxe5 35. R6d3 Kh7) 33. exf4 Na5 (33... Rad8 $15) 34. Bxf6 $11 gxf6 35. Rxf6 {White threatens Qg3+ and mate.} Ra7 36. Qxc5 Qe3+ 37. Qxe3 Rxe3 38. f5 Rxb3 39. Rxh6 Nxc4 40. f6 Rba3 {...Ra1 is the strong threat.} 41. Rd4 b3 $2 {[%mdl 8192]} (41... Ne3 $11 {and Black is okay.}) 42. Rxc4 $18 {[%mdl 4096] Endgame KRR-KRR} b2 43. Rc8+ Kf7 44. Rb8 Rxh3 ({Don't go for} 44... Ra1+ $2 45. Kh2 $18) (44... Ra2 $142 45. Kh2 Ke6 46. Rb6+ Kf5 47. Rh5+ Kg6 48. f7+ Kxf7 49. Rh7+ Kg8 50. Rxa7 b1=Q 51. Rxb1 Rxa7) 45. Rxh3 {Rh7+ would kill now.} Ra1+ 46. Kf2 b1=Q 47. Rxb1 Rxb1 {KR-KR} 48. Rf3 Rb5 49. g4 $2 (49. Kg3 $18 {is more deadly. Hoping for Kg4.} Rb8 50. Rf5) 49... Rb8 {[#]} 50. Kg3 (50. g5 $1 $16) 50... Kg6 $1 $11 {The position is equal.} 51. f7 Rf8 52. Rf5 {Threatens to win with Kf4.} (52. Kh4 $5 {[%cal Rf3f5]} Rh8+ 53. Kg3 $11) 52... Rxf7 53. Rxf7 Kxf7 54. Kf4 {aiming for Kf5.} Kf6 55. Ke4 {Precision: White = 49%, Black = 53%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Bachmann, Axel"]
[Black "Bacallao Alonso, Yusnel"]
[Result "1/2-1/2"]
[ECO "E17"]
[WhiteElo "2653"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "66"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,66,16,10,49,39,95,106,111,120,133,117,121,77,77,64,75,76,62,55,89,62,83,85,85,77,109,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 Nf6 2. Nf3 e6 3. d4 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O 7. Re1 d5 8. cxd5 exd5 9. Nc3 Nbd7 10. Bf4 c5 11. dxc5 Nxc5 12. Rc1 {LiveBook: 53 Games} Re8 {E17: Queen's Indian: 4 g3 Bb7 5 Bg2 Be7} 13. Nb5 (13. Nd4 a6 14. a3 Bf8 15. b4 Ne6 16. Nxe6 fxe6 17. Na4 Rc8 18. Rxc8 Qxc8 19. Qd4 b5 {0-1 (82) Nakamura,H (2787)-Carlsen,M (2853) chess.com INT 2016}) 13... Rf8 $146 ({Better is} 13... Ne6 $14) ({Predecessor:} 13... Ne6 14. Nc7 Nxc7 15. Rxc7 Bc8 16. Nd4 Bd6 17. Bxd6 Qxd6 18. Qc2 Bd7 19. Rc1 a5 20. e3 {½-½ (35) Boettcher,F (2177)-Vertongen,W (2166) LSS email 2011}) 14. Nfd4 $16 Qd7 {[#]White is better.} 15. b4 $1 Rfc8 16. bxc5 bxc5 17. Nc7 Rxc7 18. Bxc7 Qxc7 19. Qa4 g6 20. Red1 h5 21. e3 a6 22. Nb3 Rc8 23. Qa5 Qd6 24. Nxc5 (24. e4 $16) 24... Rxc5 $11 {The position is equal.} 25. Qxc5 Qxc5 26. Rxc5 Bxc5 27. Rb1 Bc6 {And now ...Bd7 would win.} 28. Rb8+ Be8 $1 29. Bxd5 a5 (29... Kf8 $5 {[%cal Rf6d5]} 30. Bc4 Nd7 $11) 30. Bc6 Kf8 $1 31. Bxe8 Nxe8 32. Rb5 Bb4 $1 33. a3 Bxa3 {Precision: White = 76%, Black = 46%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Cori, Jorge"]
[Black "Cordova, Emilio"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "2618"]
[BlackElo "2651"]
[Annotator "TA"]
[PlyCount "92"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,92,12,11,14,18,12,20,14,14,8,11,0,20,6,9,0,25,0,30,0,0,0,0,0,0,-3,0,-14,-21,-20,6,0,15,-23,-21,-23,13,27,29,-79,-90,-83,-58,-42,-52,-90,-88,-71,-60,-104,-95,-125,-88,-93,-87,-95,-50,-48,-17,-245,-166,-149,-172,-268,-259,-279,-280,-348,-320,-768,-775,-773,-750,-855,-855,-855,-855,-855,-855]} 1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 Bb7 5. O-O c5 6. b3 Be7 7. Bb2 O-O 8. Nbd2 d6 9. Re1 {A47: 1 d4 Nf6 2 Nf3 b6: Torre, London and Colle Systems} (9. c4 Nbd7 10. Qe2 Re8 11. Rfd1 Qc7 12. Rac1 Bf8 13. e4 e5 14. dxe5 dxe5 15. Nf1 g6 16. Bb1 Bh6 17. Rc3 Rad8 18. Rcd3 Rc8 19. Ng3 Nb8 {0-1 (49) Bartel,M (2629)-Socko,B (2631) Warsaw 2012}) 9... Nbd7 10. a3 Qc7 11. Rc1 {The position is equal.} Rfe8 12. c4 Rac8 13. Qc2 h6 $146 ({Predecessor:} 13... Qb8 14. Qb1 Bf8 15. h3 Qa8 16. Red1 Red8 17. Ng5 h6 18. Bh7+ {1-0 (18) Kovacevic,V (2499)-Kovacevic,B (2452) Sibenik 2008}) 14. Qb1 Qb8 15. b4 Qa8 16. Qa1 Bf8 17. Bf1 a6 18. h3 Red8 19. Bc3 cxd4 20. exd4 Rb8 21. Nh2 b5 22. c5 Nd5 23. Nb3 Nf4 {[%cal Rb7g2]} 24. f3 (24. g3 $5 {[%cal Rg3f4]} Nh5 25. Na5 $11) 24... e5 25. Na5 Ne6 26. Bb2 {[#] c6 is the strong threat.} Rbc8 27. cxd6 (27. c6 $1 $11 {remains equal.} Bxc6 28. Rxc6 Rxc6 29. d5) 27... Rxc1 $17 28. Rxc1 e4 29. Nxb7 Qxb7 30. fxe4 Qxe4 31. Re1 Qd5 32. Ng4 Bxd6 33. Qd1 Bg3 34. Re3 Bf4 $36 {[%mdl 2048] Hoping for ...h5. Black is in control.} 35. Rd3 h5 36. Ne5 Qa2 ({Don't play} 36... Bxe5 $6 37. dxe5 Qa2 38. Bc3 $16 (38. Rxd7 Rxd7 39. Qxd7 Qxb2 $14)) 37. Nxf7 $2 {[#]} (37. d5 $11 {and White has nothing to worry.} Nxe5 38. Bxe5 Bxe5 39. dxe6 Rxd3 40. exf7+ Qxf7 41. Bxd3) 37... Kxf7 ({Stronger than} 37... Qxb2 38. Nxd8 Nxd8 39. Qf3 $18) 38. d5 Nef8 ({Inferior is} 38... Qxb2 39. Qxh5+ Ke7 40. dxe6 $14) 39. Rb3 (39. Qxh5+ $142 Kg8 40. Bd4) 39... Be5 $19 40. d6 Kg8 41. Qd5+ Kh8 42. Bd3 $2 (42. Bxe5 Nxe5 43. Rd3) 42... Nf6 {Black is clearly winning.} 43. Qxe5 Qxb3 44. Qe7 Re8 45. Bxf6 Rxe7 46. dxe7 Qf7 {Precision: White = 36%, Black = 62%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Sevian, Samuel"]
[Black "Delgado Ramirez, Neuris"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2601"]
[BlackElo "2613"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,89,18,29,14,20,35,38,0,0,-36,-26,-31,-25,-40,2,-72,0,0,0,0,18,16,52,50,42,39,47,45,55,54,67,67,50,52,44,35,89,47,58,56,64,78,164,154,222,223,200,210,256,131,135,132,200,198,200,73,454,448,465,298,395,429,450,460,580,521,912,889,855,833,832,791,1136,1068]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be6 8. f3 Nbd7 9. g4 {[%cal Bg2g4,Bg4g5][%mdl 32]} b5 10. g5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5} b4 11. Ne2 Ng8 12. h4 {White is slightly better.} h6 13. Qd2 $146 ({Predecessor:} 13. Bg2 hxg5 14. hxg5 Rxh1+ 15. Bxh1 Nb6 16. Qd3 Be7 17. f4 Nc4 {½-½ (104) Zhigalko,S (2639)-Sutovsky,E (2650) Poikovsky 2017}) 13... a5 14. Rg1 hxg5 15. hxg5 Qc7 16. Ng3 (16. a3 $11 {keeps the balance.}) 16... Rb8 (16... a4 $17 17. Nc1 Ne7) 17. f4 $1 $36 {[%mdl 2048] White has the initiative.} a4 18. f5 Bc4 19. Nc5 Nb6 20. Na6 Bxa6 $1 21. Bxa6 Nc4 22. Bxc4 $1 Qxc4 23. b3 Qc3 24. Qxc3 bxc3 25. O-O-O axb3 26. axb3 Rh2 (26... Rh4 $1 $14) 27. Rh1 Rg2 $1 {[%cal Rg2g3]} 28. Rdg1 Rxg1+ $1 29. Bxg1 Be7 (29... Ne7 $16) 30. Be3 $18 Ra8 (30... Bf8 $16 31. Rh7 Ne7) 31. Kb1 Kd7 32. Rh8 Rc8 33. Nh5 (33. Rh7 $18) 33... g6 $16 34. Ng3 gxf5 (34... f6 $16 {was worth a try.}) 35. Nxf5 $18 Rf8 36. Kc1 (36. b4 $18) 36... Ke6 $2 {[%mdl 8192] [#]} (36... Rb8 $16 {is a better chance.} 37. Kd1 Ke6 38. Ng7+ Kd7) 37. Kd1 Rd8 {If only Black now had time for ...d5....} 38. Ng7+ Kd7 39. Ke2 Rc8 {White is clearly winning.} 40. Nf5 Ke6 41. Nh6 Nxh6 42. Rxc8 Ng4 43. Bc1 f5 44. g6 {[#] aiming for g7.} Kf6 45. Re8 {Precision: White = 56%, Black = 35%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Fier, Alexandr"]
[Black "Hungaski, Robert Andrew"]
[Result "1-0"]
[ECO "C72"]
[WhiteElo "2576"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,61,36,39,35,42,52,24,30,19,25,21,49,39,40,42,50,33,48,2,22,11,39,39,94,108,138,148,124,94,120,89,125,81,89,75,96,79,158,156,168,137,144,144,139,116,286,319,29995,29996,29996,29997]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O Bd7 6. c4 Nge7 {C72: Ruy Lopez: Deferred Steinitz: 5 0-0} (6... g5 7. Bxc6 Bxc6 8. Nc3 Bg7 9. d3 h6 10. Be3 Ne7 11. d4 Ng6 12. dxe5 dxe5 13. Qc2 O-O 14. Rad1 {1-0 (36) Sjugirov,S (2646)-Mamedyarov,S (2748) Doha 2015}) 7. Nc3 {LiveBook: 12 Games} g6 8. d4 {And now Bg5 would win.} Bg7 {[%cal Rc6d4] White is slightly better.} 9. d5 Nd4 10. Nxd4 $146 ({Predecessor:} 10. Bxd7+ Qxd7 11. Be3 Nxf3+ 12. Qxf3 f5 13. exf5 gxf5 14. Qh5+ {0-1 (43) Paravyan,D (2424)-Demchenko,A (2588) St Petersburg 2014}) 10... exd4 11. Ne2 b5 12. cxb5 axb5 13. Bb3 $36 {[%mdl 2048] White is more active.} c5 {aiming for ...c4.} 14. dxc6 $1 Nxc6 15. f4 {[%cal Bf2f4,Bf4f5,Bf5f6][%mdl 32]} O-O 16. f5 $1 Na5 17. Bd5 Bc6 ({Black should play} 17... Rc8 $14) 18. Nf4 $1 $16 (18. Nxd4 $6 Bxd5 19. exd5 Re8 $11) 18... Bxd5 19. Nxd5 {Strongly threatening f6.} Re8 20. f6 Bf8 21. Qd3 (21. Qxd4 Nb3 $17) 21... Nc6 22. Bf4 Qb8 23. a3 Qb7 24. Rae1 b4 ({Better is} 24... h5) 25. Qd2 $1 h5 26. Bh6 {White threatens Bxf8 and mate.} (26. Nxb4 Nxb4 27. Bh6 (27. axb4 Ra4 $15) (27. Qxb4 Qxb4 28. axb4 Re6 $11) 27... Nc2 $1 $11 {[%mdl 512]}) 26... Kh7 27. Bxf8 Rxf8 28. Rf5 $1 {[%cal Rf5h5] Rxh5+! would kill now.} ({Resist} 28. Nxb4 $6 Nxb4 29. axb4 Ra4 $11) (28. axb4 d3 $14) 28... Qd7 $2 {[#]} ({Inferior is} 28... bxa3 {[#]} 29. Rxh5+ $1 {[%mdl 512]} Kg8 30. Qh6 $1 {[%mdl 512]} gxh5 31. Qg7#) ({Not} 28... gxf5 29. Qg5 fxe4 30. Qg7#) (28... Ne5 $16) 29. Qd1 $3 $18 {[%mdl 512] White wants to mate with Rxh5+!} bxa3 $2 {[#]} (29... Kh6 $18 30. Nf4 Ra5) 30. Rxh5+ $1 {[%mdl 512]} Kg8 {[#]} (30... gxh5 31. Qxh5+) 31. Qd2 $1 {[%mdl 512] Precision: White = 82%, Black = 32%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Ortiz Suarez, Isan Reynaldo"]
[Black "Cori Quispe, Kevin Joel"]
[Result "1/2-1/2"]
[ECO "B41"]
[WhiteElo "2570"]
[BlackElo "2390"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,82,52,57,44,51,43,62,67,73,42,40,36,57,35,28,33,25,25,27,6,7,8,6,8,8,6,6,4,7,22,57,63,75,19,20,23,14,15,242,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Qc7 7. Be2 b6 8. Be3 Bb7 9. f3 Be7 10. O-O d6 11. Qd2 O-O 12. Rfc1 Nbd7 13. a4 {B41: Sicilian: Kan Variation: 5 c4} (13. b4 Rfe8 14. Na4 Bf8 15. Rab1 Rac8 16. Bf1 Qb8 17. Qf2 Ba8 18. Nb3 Rc6 19. Rd1 Rec8 20. Rb2 Ne5 {½-½ (123) Nepomniachtchi,I (2767)-Pantsulaia,L (2607) Doha 2016}) 13... Rab8 14. Nd1 Ne5 $146 ({Predecessor:} 14... Rfc8 15. a5 bxa5 16. Rxa5 Ne5 17. b4 Nc6 18. Nxc6 Qxc6 19. c5 Bd8 20. Ra3 d5 {1-0 (39) Milanovic,D (2496)-Potpara,N (2390) Niksic 2016}) 15. a5 {White is slightly better.} bxa5 16. Qxa5 Qxa5 17. Rxa5 Rfc8 18. Ra2 d5 19. exd5 exd5 20. Nf5 Bc5 21. b4 Bxb4 {[%cal Re5c4]} 22. c5 Rc7 $1 23. Bxa6 Bxa6 24. Rxa6 Nd3 {[#] And now ...d4 would win.} 25. Rb1 $36 {[%mdl 2048] Ra3! is the strong threat. White has good play.} Nxc5 26. Ra2 {Black must now prevent Rxb4!} Ncd7 27. Rab2 $1 {[%cal Rb2b4]} Rc4 28. Bf2 {[#]} (28. Bd4 $16) 28... d4 $1 $11 {[%mdl 512]} 29. Bxd4 Nd5 30. Bf2 Re8 $2 (30... Rc6 $1 $11 {and Black stays safe.}) 31. Nfe3 $2 ({White has to play} 31. Nde3 $18 Rc5 32. Nxd5 (32. Rxb4 Nxb4 33. Rxb4 g6 $16) 32... Rxd5 33. Ne3 (33. Rxb4 Rxf5 34. h3 h6 $14) 33... Rxe3 34. Bxe3) 31... Bc5 {[%cal Rd5e3] The position is equal.} 32. Rb3 Nxe3 33. Nxe3 Ra4 34. Rb7 Bxe3 35. Bxe3 Rxe3 36. Rxd7 {[%mdl 4096] Endgame Intending Rd8+ and mate. KRR-KRR} g6 37. Rb8+ Kg7 {Strongly threatening ...Ra2.} 38. Rbb7 Rf4 39. Kf2 Ra3 40. Kg3 Rf5 41. h4 h5 {Precision: White = 57%, Black = 76%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Flores, Diego"]
[Black "Kovalyov, Anton"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2567"]
[BlackElo "2643"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,53,18,17,31,8,21,10,32,-2,50,68,76,68,107,87,112,96,132,88,164,166,174,178,170,209,173,127,999,1014,904,987,966,944,1110,1068,1065,1060,1713,955,955,952]} 1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 Be7 5. O-O O-O 6. b3 c6 7. Bb2 b5 8. Qc2 Bb7 {A14: English Opening: 1...e6 with b3 by White} 9. d3 a5 10. Nc3 $146 ({Predecessor:} 10. Nbd2 Na6 11. a3 b4 12. a4 Rc8 13. e4 Nc5 14. e5 Ne8 15. Rad1 Nd7 16. Rfe1 g6 17. Nf1 Ng7 18. Ne3 Re8 19. Bc1 {1-0 (45) Sorokin,M (2574)-Piankov,E (2374) Linares 2000}) 10... a4 {The position is equal.} 11. cxd5 exd5 (11... a3 $11 12. d6 Qxd6) 12. bxa4 $14 b4 13. Nd1 Qa5 14. Ne3 {[%cal Bd1e3,Be3f5,Bf5h6,Bh6f7,Bf7d6][%mdl 32]} Qxa4 15. Qc1 {And now Nf5 would win.} Bc8 16. Nd4 Bd8 (16... Re8 $16) 17. Nef5 {Black must now prevent Qg5.} Ne8 18. e4 dxe4 19. Bxe4 Bf6 20. Re1 {Strongly threatening Nh6+!} Ra5 $2 {[%mdl 8192] [#]} (20... Bxf5 $16 21. Nxf5 Bxb2 22. Qxb2 Kh8) 21. Nh6+ $1 $18 {[%mdl 512] White is clearly winning.} Kh8 {[#]} (21... gxh6 22. Qxh6) 22. Nxf7+ $1 {[%mdl 512]} Kg8 (22... Rxf7 23. Bxc6) 23. Qc4 {White wants to mate with Nh6+.} Rd5 24. Bxd5 cxd5 25. Qxc8 Nd6 26. Qxf8+ Kxf8 27. Nxd6 {Precision: White = 77%, Black = 21%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Shabalov, Alexander"]
[Black "Ruiz Castillo, Joshua Daniel"]
[Result "1-0"]
[ECO "B23"]
[WhiteElo "2556"]
[BlackElo "2367"]
[Annotator "TA"]
[PlyCount "189"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,189,-12,-21,14,-9,-11,-14,0,0,17,4,19,16,25,0,0,0,15,12,31,29,31,27,47,21,69,63,58,12,12,0,12,0,14,0,23,26,50,51,254,62,102,0,0,0,0,-12,-27,-66,-33,-77,-66,-68,-68,-66,-49,-49,-49,-49,-27,-49,-35,-66,0,0,0,-66,-66,-66,-66,-66,-66,-66,-66,-66,-66,-66,-66,-66,-59,-66,-59,-59,-33,-25,-49,-58,-36,-71,-36,-30,0,0,0,-47,-57,-69,-41,-45,0,-89,0,-48,-43,-45,-41,-41,-32,-23,-23,-58,-10,-22,0,-58,-60,-61,-58,-92,-39,-62,-61,-58,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,23,0,0,0,0,0,0,0,0,0,0,0,0,0,183,181,154,62,189,205,229,222,379,385]} 1. e4 c5 2. Nc3 g6 3. h4 (3. d4 cxd4 4. Qxd4 Nf6 5. Nf3 Nc6 6. Qa4 d6 7. e5 dxe5 8. Nxe5 Bd7 9. Nxd7 Qxd7 10. Be3 Bg7 11. Rd1 Qg4 12. Rd4 Qf5 13. Bd3 Qe5 14. Rb4 Qc7 15. Bb5 O-O 16. Rc4 {0-1 (36) Wei,Y (2706)-Bu,X (2681) China 2015}) 3... h5 4. Bc4 Nc6 5. Nf3 Bg7 6. d3 {LiveBook: 4 Games. B23: Closed Sicilian: Lines without g3} Na5 7. Bb3 Nf6 $146 ({Predecessor:} 7... Nxb3 8. axb3 d6 9. Be3 Nf6 10. Qd2 b6 11. Bg5 {1-0 (41) Matinian,N (2291)-Simonov,V (2301) Vladimir 2008}) 8. Bg5 {The position is equal.} Nxb3 9. axb3 d6 10. Qd2 a6 11. O-O Bg4 12. Nh2 $36 {[%mdl 2048] White has good play.} Bd7 13. Rae1 O-O 14. Bh6 b5 15. Bxg7 Kxg7 16. f4 b4 17. Nd1 d5 18. e5 Nh7 19. Ne3 d4 20. Nc4 a5 21. Qf2 Ra6 22. Nf3 Qa8 23. Nfd2 Rc8 24. Ne4 Nf8 $2 {[#]} (24... Bf5 $1 $14) 25. Ng3 $2 ({White must play} 25. e6 $1 $18 {[%cal Re6d7][%mdl 512]} Bxe6 (25... Rxe6 26. f5) 26. Nxc5 $1 {[%mdl 512]}) 25... Bf5 $1 $14 26. e6 (26. Ra1 $16) 26... f6 $1 $11 (26... Bxe6 $2 27. f5 $18) 27. Nxf5+ gxf5 28. Qg3+ Ng6 29. Rf3 Rf8 30. Ra1 Qd5 31. Rxa5 Rxa5 32. Nxa5 Ra8 33. Nc4 Ra6 34. Rf1 Rxe6 35. Qf2 Qa8 36. g3 Kf8 (36... Ra6 $15) 37. Qd2 {Qd1 is the strong threat.} Kg7 {[%cal Bf8g7,Bg7h6,Bh6g6,Bg6f7][%mdl 32]} 38. Kf2 (38. Qf2 $11) 38... Ra6 $15 39. Qd1 Kh6 $1 40. Re1 e6 41. Qf3 {And now Qxa8 would win.} Qa7 42. Ke2 Nh8 43. Kd2 Nf7 44. Qh1 Kg6 45. Rf1 Nd8 (45... Nh6 {with more complications.} 46. Kd1 Qd7 47. Ke2 Qd5 48. Kd2 Kf7) 46. Re1 Qb7 (46... Kh6 {seems wilder.} 47. Rg1 Kg7 48. Rf1 Nf7 49. Qf3 Kh6) 47. Qxb7 Nxb7 {[%mdl 4096] Endgame KRN-KRN} 48. Ke2 Kf7 49. Rc1 Ke7 50. c3 $1 Nd8 51. cxb4 cxb4 52. Kf3 Nc6 53. Re1 Kd7 54. Kf2 Ke7 55. Kf3 Kd7 56. Kf2 Ne7 57. Kf3 Nd5 58. Rc1 Nc7 59. Ke2 Nb5 60. Kd2 Ke7 61. Rc2 Kd7 62. Rc1 Na7 63. Re1 Nc6 64. Rf1 {[#]} Nb8 (64... Na5 $1 $17 65. Nxa5 Rxa5) 65. Re1 Kc7 66. Rc1 Kb7 (66... Nc6 $15) 67. Ke2 $11 Nd7 68. Nd2 Rc6 69. Ra1 Ra6 70. Rc1 Nb8 71. Rc5 Nc6 72. Nc4 Kc7 73. Kd2 Ra1 74. Ke2 Kd7 75. Rb5 Ra7 76. Kd2 Kc7 77. Ke2 Ra8 78. Rc5 Ra6 79. Kd2 Ra1 80. Ke2 Ra8 81. Kf2 Kd7 82. Rb5 Rb8 83. Rc5 $1 Rb7 84. Ke2 (84. g4 $5 {[%cal Rg4f5]}) 84... Ne7 85. Ra5 Nc6 86. Rc5 Rb8 87. Kf2 Ne7 88. Ra5 Nd5 89. Ra6 Nc7 90. Rd6+ Kc8 $2 (90... Ke7 $11 {and Black has nothing to worry.}) 91. Nb6+ $18 ({Resist} 91. Rxd4 $6 Nb5 $16) 91... Kb7 92. Na4 ({Better is} 92. Nd7 $16 Ra8 93. Nc5+ (93. Nxf6 Ra2 $16) 93... Kc8 94. Rxd4 (94. Nxe6 Nxe6 95. Rxe6 Ra2 $16)) 92... Re8 ({Black should play} 92... Nd5 $1 $14) 93. Nc5+ ({But not} 93. Rxd4 Nd5 $16) 93... Kc8 94. Rxd4 Nd5 $2 {[#]} (94... Rd8 {was necessary.} 95. Rxb4 Rd6) 95. Nxe6 $1 {[%mdl 512] Precision: White = 59%, Black = 42%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Erenburg, Sergey"]
[Black "Iturrizaga Bonelli, Eduardo"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2550"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "25"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,25,29,62,-2,-12,-9,-1,-10]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Nd7 6. O-O h6 7. Nbd2 Ne7 {B12: Caro-Kann: Advance Variation} 8. Nb3 g5 (8... Qc7 9. Bd2 g5 10. c4 a5 11. Rc1 dxc4 12. Bxc4 Bg7 13. Re1 O-O 14. h4 g4 {1-0 (39) Vachier Lagrave,M (2804)-Tomashevsky,E (2716) Doha 2016}) 9. a4 Bg7 10. a5 O-O {LiveBook: 5 Games} 11. c4 (11. c3 $14) 11... dxc4 $11 12. Bxc4 Rc8 $146 ({Predecessor:} 12... Nd5 13. Re1 Qe7 14. Bd3 Bxd3 15. Qxd3 {½-½ (41) Burg,T (2507)-Dragun,K (2580) Maastricht 2015}) 13. Be3 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Garcia Pantoja, Roberto"]
[Black "Palencia Morales, Wilson Guillermo"]
[Result "1-0"]
[ECO "C11"]
[WhiteElo "2500"]
[BlackElo "2343"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,81,39,55,8,8,8,15,7,36,29,39,36,27,32,43,0,89,81,83,66,129,130,177,183,391,264,893,450,436,410,491,482,482,467,510,352,620,613,583,195,187,189,190,118,262,0,142,130,142,146,117,0,1580,1445,29994,29995,29996,29997,29997,29998,29998,29999]} 1. e4 {[%cal Be2e4,Be4e5][%mdl 32]} e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 Qb6 8. Na4 Qa5+ 9. c3 cxd4 10. b4 Qc7 11. Nxd4 a6 {LiveBook: 13 Games} 12. Nb3 {C11: French: Classical System: 4 e5 and 4 Bg5 dxe4} (12. a3 b5 13. Nb2 Nb6 14. Be2 Bd7 15. O-O Be7 16. Qe1 O-O 17. Qf2 Rab8 18. Bd3 f5 19. h3 Nc4 20. Nxc4 dxc4 {0-1 (72) Motylev,A (2653)-Fedoseev,V (2664) Khanty-Mansiysk 2015}) 12... g5 $146 ({Predecessor:} 12... Be7 13. Bd3 g6 14. O-O f6 15. exf6 Nxf6 16. Bb6 Qb8 17. Qe2 e5 18. fxe5 Qxe5 19. Rae1 Qxe2 20. Rxe2 {½-½ (42) Morgunov,A (2307)-Mamyrbay,A (2078) Kazan 2014}) 13. g3 h5 14. h4 {The position is equal.} gxf4 (14... d4 $5 15. Nxd4 b5 $11) 15. gxf4 b6 16. Qd2 Bb7 {...d4! is the strong threat.} 17. Rh3 {[%cal Bh1h3,Bh3g3,Bg3g7][%mdl 32]} Be7 18. Qf2 {[%cal Ra4b6]} Bd8 (18... d4 $1 $11 19. Nxd4 b5) 19. Bd3 Rg8 20. Rg3 Rh8 (20... Rxg3 $14 21. Qxg3 Be7) 21. Rg7 $16 Ne7 22. Nd4 Kf8 $2 (22... Bc8 23. Kd2 b5) 23. Qg3 $18 {Black must now prevent Kd2.} b5 $2 (23... Bc6) 24. Nc5 Nxc5 25. bxc5 Bc8 26. Rh7 Rxh7 27. Bxh7 Qa5 28. Bd2 Qa3 $2 {[#]} (28... Qc7 29. f5 exf5) 29. f5 $1 {[%mdl 512]} exf5 {[#]} 30. c6 $2 (30. e6 $1 {[%mdl 512]} Bxe6 31. Qe5) 30... Bb6 31. Qg5 $36 {[%mdl 2048] White is on the roll.} Bxd4 32. cxd4 {aiming for Qf6.} Qf3 (32... f4 $16) 33. Qh6+ (33. Qf6 $1 $18 {[%cal Rf6h8] White wants to mate with Qh8+.} Qh1+ 34. Ke2 Qg2+ 35. Kd1 (35. Kd3 Qe4+ 36. Kc3 b4+ 37. Kb2 Qxd4+ 38. Kc2 Qc5+ 39. Kb1 Qg1+ 40. Kc2 Qc5+ 41. Kb2 Qd4+ 42. Kc2 Qc4+ 43. Kb2 Nxc6 $11) 35... Qf1+ 36. Kc2 Qc4+ 37. Kd1 Qf1+ 38. Kc2 Qc4+ 39. Kb2 Qxd4+ 40. Bc3 Qf2+ 41. Kb3) 33... Ke8 $16 {Strongly threatening ...Qh1+.} 34. Qf6 $1 {[%cal Rf6h8][%mdl 1024] White has strong compensation.} Qh1+ 35. Ke2 {[%cal Be1e2,Be2d1,Bd1c1][%mdl 32] White threatens Qh8+ and mate.} Qg2+ {[#]} 36. Kd1 $1 {[%cal Rd1c1]} ({Wrong is} 36. Kd3 $2 Qe4+ 37. Kc3 {[#]} b4+ $1 {[%mdl 512]} 38. Kb2 Qxd4+ 39. Kc2 Qc4+ 40. Kb2 Nxc6 $17) 36... Qg4+ $2 {[%mdl 8192]} (36... Qf1+ $11 37. Be1 Qd3+ 38. Bd2 Qf1+ 39. Be1 Qd3+ 40. Bd2 Qf1+) 37. Kc1 $18 Ng6 38. Bxg6 {White mates.} fxg6 39. Qh8+ Kf7 40. Qh7+ Ke8 41. Qg8+ {Precision: White = 62%, Black = 33%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Barrientos, Sergio E"]
[Black "Torres, Juan Camilo"]
[Result "1-0"]
[ECO "C91"]
[WhiteElo "2463"]
[BlackElo "2275"]
[Annotator "TA"]
[PlyCount "113"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,113,41,45,20,27,19,18,0,0,0,0,0,0,20,8,0,0,-5,0,0,0,-18,-9,-32,-7,-22,-20,-26,33,27,34,0,0,-87,-75,-143,-125,-198,-194,-190,-114,-333,-335,-280,-169,-152,-93,-68,30,48,43,37,36,36,93,78,80,23,72,22,29,27,47,47,47,53,39,36,61,58,113,60,68,62,189,179,319,323,318,318,292,280,333,323,420,431,416,435,823,395,924,476,2018,664,29948,12836]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. d4 Nd7 10. a4 Bb7 11. d5 {C90: Closed Ruy Lopez with 7...d6: Early deviations} Na5 12. Ba2 c6 (12... c5 13. dxc6 Bxc6 14. axb5 axb5 15. Bd5 Nc4 16. Na3 Bxd5 17. Qxd5 Nxa3 18. Rxa3 Rxa3 19. bxa3 {½-½ (60) Ragger,M (2703)-Costachi,M (2430) Graz 2017}) 13. b4 {The position is equal.} cxd5 $146 ({Predecessor:} 13... Nc4 14. Bxc4 bxc4 15. dxc6 Bxc6 16. Na3 f5 17. exf5 Nb6 18. a5 Nd5 19. Nxc4 Nxc3 {½-½ (73) Fernandez Aguado,J (2470)-Garcia Callejo,J (2350) Lleida 1991}) 14. bxa5 dxe4 15. Nfd2 Nc5 16. Ba3 d5 17. Bxc5 Bxc5 18. Nb3 Be7 19. axb5 axb5 20. N1d2 Kh8 21. Qe2 Qd7 22. Red1 {Hoping for Nxe4!} f5 23. Nf1 b4 (23... Rfc8 $11) 24. cxb4 $14 Bxb4 25. Qb2 Qe7 26. Rab1 {[#]} (26. Nc1 $11 {keeps the balance.} Ba3 27. Qb5) 26... Ba3 $1 $17 {[%cal Ra3b2][%mdl 1024] Black has strong compensation.} 27. Qd2 (27. Qc2 $142) 27... d4 28. Nc1 (28. Nxd4 $17 exd4 29. Qxd4) 28... f4 $19 29. Qe1 f3 (29... Ra6 $19 30. Bc4 Rg6) 30. g3 $2 (30. gxf3 $17 Rxf3 31. Ng3) 30... Qd7 31. Ne3 Ba6 {And now ...Qh3 would win.} 32. Bc4 Qc7 (32... Qa4 $142 33. Bb3 Qd7) 33. Bxa6 $17 dxe3 (33... Rxa6 $15 34. Nd5 Qd7) 34. Qxe3 $11 Bc5 35. Qxe4 {Strongly threatening Bd3.} Rxa6 36. Nb3 {Threatens to win with Rbc1.} Bd4 (36... h6 $14) 37. Rbc1 Qa7 38. Rc2 (38. Nxd4 $16 exd4 39. Rxd4) 38... Qa8 39. Qe1 h6 40. h3 Qd5 41. Qb4 $36 {[%mdl 2048] White has good play.} Raa8 42. Nxd4 exd4 43. Rc5 Qe6 44. g4 d3 ({Black should try} 44... Qa2 $14) 45. Rxd3 ({Better is} 45. Qc3 $16) 45... Rab8 $14 46. Qd2 Qe7 (46... Qe2 $1 $14 47. Rc1 Rb2) 47. Rd6 Rf6 (47... Kg8 {might work better.}) 48. Rxf6 $18 Qxf6 {[%mdl 4096] Endgame KQR-KQR} 49. Rf5 Qc6 50. Qf4 Ra8 51. Kh2 ({Weaker is} 51. Qxf3 Qxf3 52. Rxf3 Rxa5 $16) 51... Qc8 52. Qxf3 Qc7+ 53. Kg2 Qd8 {[#]} (53... Ra6 $142 54. Rf8+ Kh7 55. Qe4+ g6) 54. h4 (54. a6 $142 $1 Kg8 (54... Rxa6 55. Rf8+) 55. Qb7) 54... Kh7 $2 (54... Kg8 55. Qd5+ Qxd5+ 56. Rxd5 Kf7) 55. g5 Ra6 (55... Qe8 $142 56. Rc5 Ra7 57. gxh6 Rf7 58. Qd3+ Kxh6 59. Qd2+ Kh7 60. Qc2+ g6) 56. Rd5 (56. Rf8 $142 Qxf8 57. Qxf8 Rxa5 58. Qb4 Rxg5+ 59. hxg5) 56... Qa8 57. Qd3+ {Precision: White = 43%, Black = 38%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Terry, Renato"]
[Black "Valdes Romero, Leonardo"]
[Result "1-0"]
[ECO "A53"]
[WhiteElo "2454"]
[BlackElo "2407"]
[Annotator "TA"]
[PlyCount "135"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,135,57,53,50,50,43,44,39,40,35,44,53,81,55,59,57,77,38,63,5,54,43,52,46,63,56,56,51,48,42,154,159,158,152,129,94,153,159,193,193,185,164,166,105,101,106,109,102,130,95,109,58,111,44,132,73,154,145,145,148,146,122,159,125,135,78,113,58,191,0,125,0,186,180,275,265,604,585,1208,1130,1145,1016,987,975,1082,1083,1062,1034,1483,1473,1367,1331,29969,8520,29981,29982,29982,29983,29983,29984,29980,29971,29982,29983,29989,29990,29990,29991,29990,29986,29990,29991,29992,29991,29990,29990,29996,29997]} 1. d4 d6 2. c4 Nf6 3. Nc3 Nbd7 4. g3 e5 5. e3 Be7 6. Bg2 O-O 7. Nge2 c6 8. O-O Re8 9. b3 Bf8 10. Qc2 {A53: Old Indian Defence without Nf3} Qc7 {LiveBook: 4 Games} 11. Bb2 a6 12. Rac1 {White is slightly better.} Rb8 13. Rfd1 g6 {[#]} 14. h3 $146 h5 15. Rd2 Be7 16. Rf1 Bf8 17. Rfd1 Ra8 18. d5 c5 19. e4 (19. Ra1 $14) 19... Qd8 20. a4 Bh6 21. Rd3 $1 h4 22. Rf1 Nh5 23. Bc1 Bxc1 24. Qxc1 Ndf6 (24... Kg7 $1 $14) 25. g4 $16 ({Don't do} 25. gxh4 Nh7 $14) 25... Ng7 26. f4 Nh7 27. f5 g5 {[#]} (27... Rf8 $142) 28. f6 $1 {[%mdl 512]} Nxf6 29. Qxg5 Nh7 30. Qh6 Rf8 31. Rdf3 (31. g5 $18) 31... Ne8 32. Qc1 Qg5 33. Qe1 Qh6 34. a5 Ng5 35. Rd3 (35. R3f2 $16) 35... Bd7 ({Black should try} 35... Rb8 $14) 36. Nd1 (36. Na4 $16) 36... Ng7 (36... Rb8 $1 $14) 37. Ne3 (37. b4 $142) 37... Rab8 (37... Qh7 $142) 38. b4 $1 Rfc8 39. bxc5 Rxc5 40. Qb4 Nh7 41. Qb6 Nf8 42. Nc3 ({Better is} 42. Rb3) 42... Ne8 43. Qb4 Ng7 {[#]} (43... Ng6 $14) 44. Ne2 $2 (44. Nf5 $1 $18 {[%cal Rf5h6]} Bxf5 45. exf5) 44... Ne8 (44... Nh7 $1 $11) 45. Nc3 (45. Kh1 $16) 45... Ng7 $1 $18 {[#]} 46. Nf5 $1 $36 {[%cal Rf5h6,Be3f5,Bf5d6,Bd6f7][%mdl 2080] White is really pushing.} Qf6 {[#]} (46... Nxf5 {is a better defense.} 47. exf5 Rbc8) 47. g5 $1 {[%mdl 512]} Qxg5 $2 (47... Qd8) 48. Nxd6 Rc7 49. Nxf7 Qg6 50. Nxe5 Qh5 51. Qd6 Re8 {[#]} 52. Rxf8+ $1 Rxf8 53. Qxc7 Bxh3 54. Rxh3 Qg5 55. Ne2 Qd2 56. Rf3 Qe1+ 57. Rf1 {White mates.} Rxf1+ 58. Bxf1 Qd2 59. Qd8+ Kh7 60. Qxh4+ Kg8 61. Qf4 Qxa5 62. Qf7+ Kh7 63. Nd7 Qd2 64. Qf4 Qb2 65. e5 a5 66. Nf6+ Kg6 67. Ne4 a4 68. Qf6+ {Precision: White = 46%, Black = 41%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Zapata, Alonso"]
[Black "Bruzon Batista, Lazaro"]
[Result "0-1"]
[ECO "C60"]
[WhiteElo "2420"]
[BlackElo "2650"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,76,31,30,23,19,16,33,-29,-28,-38,-35,-65,-65,-60,-68,-58,-64,-61,-62,-85,-68,-87,-74,-108,-64,-90,-75,-70,-61,-67,-59,-62,-59,-77,-63,-59,-61,-82,-81,-122,-129,-121,-110,-112,-118,-129,-129,-125,-120,-124,-109,-110,-109,-139,-100,-258,-255,-554,-548,-543,-540,-34,-497,-684,-675,-6019,-1964,-29966,-29969]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 g6 4. c3 a6 5. Bxc6 (5. Ba4 d6 6. d4 Bd7 7. dxe5 Nxe5 8. Nxe5 dxe5 9. Be3 Nf6 10. Nd2 b5 11. Bb3 Bd6 12. Qf3 h6 13. a4 Rb8 14. axb5 axb5 15. O-O {1-0 (36) Sutovsky,E (2650)-Rodshtein,M (2701) Poikovsky 2017}) 5... dxc6 {[%cal Bd7c6,Bc6c5][%mdl 32]} 6. O-O {C60: Ruy Lopez: Unusual Black 3rd moves and 3...g6} Bg7 7. d4 exd4 8. Nxd4 (8. cxd4 $14 Ne7 9. Nc3) 8... c5 $11 9. Nb3 {Strongly threatening Qxd8+.} b6 10. Qxd8+ $146 ({Predecessor:} 10. Bf4 Bb7 11. Qxd8+ Kxd8 12. Rd1+ {½-½ (23) Bakre,T (2459)-Priyadharshan,K (2298) New Delhi 2007}) 10... Kxd8 11. Bg5+ f6 12. Rd1+ Bd7 $1 13. Bf4 Kc8 14. Na3 Be6 15. Nc2 Ne7 16. Rd2 Nc6 17. Rad1 Rf8 18. Ne3 Rf7 19. f3 Kb7 20. Kf2 a5 {[%cal Ba6a5,Ba5a4,Ba4a3][%mdl 32]} 21. Nc1 a4 22. h4 Re8 23. h5 a3 24. hxg6 hxg6 25. b3 f5 26. exf5 Bxc3 27. fxe6 Rxf4 28. Rd7 Bd4 29. Ne2 Bxe3+ 30. Kxe3 Rf6 31. Nf4 Nb4 {[#] Hoping for ...g5.} 32. Rg7 $2 (32. Rd8 $17 {is a better defense.} Rff8 33. Kf2) 32... Nxa2 $19 {Threatens to win with ...Nb4.} 33. Rdd7 $2 (33. Rxc7+ {was necessary.} Kxc7 34. Nd5+ Kc6 35. Nxf6 Rxe6+ 36. Ne4) 33... Nb4 34. Rxc7+ Ka6 35. Ra7+ Kb5 36. g4 a2 {[#] aiming for ...Na6.} 37. g5 Rexe6+ (37... Rfxe6+ $142 38. Nxe6 Rxe6+ 39. Kf4 Na6) 38. Nxe6 Rxe6+ {Precision: White = 33%, Black = 81%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Fernandez, Fernando"]
[Black "Ramirez, Alejandro"]
[Result "1/2-1/2"]
[ECO "B48"]
[WhiteElo "2416"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "135"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,135,11,5,9,16,6,38,0,3,22,31,10,23,9,20,0,-4,-40,10,-55,12,-2,0,-62,-44,-31,-35,-102,-95,-278,-286,-287,-288,-277,-241,-257,-160,-197,-42,-131,-131,-142,-115,-139,-138,-123,-121,-142,-137,-188,-185,-137,-54,-55,-68,-68,-63,-65,0,0,25,0,0,0,0,0,0,0,48,48,48,48,48,48,61,48,48,48,48,52,52,46,51,45,55,55,56,47,44,21,81,81,144,104,214,141,124,119,237,96,151,0,13,0,0,0,8,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qd2 Nf6 8. O-O-O Bb4 9. f3 Ne5 10. Nb3 b5 11. Kb1 {B48: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 without Be2} Be7 12. Qf2 Bb7 {LiveBook: 4 Games} 13. Na5 $146 ({Predecessor:} 13. Bb6 Qb8 14. Bd4 d6 15. g4 b4 16. Na4 Nxf3 17. Qxf3 Bxe4 18. Qh3 Bxh1 {0-1 (53) Akopian,V (2657)-Giri,A (2776) Doha 2014}) 13... O-O (13... Qxa5 $2 14. Bb6 $18) 14. Bb6 Qc8 15. Rg1 d6 16. g4 Nfd7 17. Bd4 (17. f4 $5 {[%cal Rf4e5]} Ng6 18. Nxb7 Qxb7 19. Bd4 $15) 17... Nc6 (17... Bd8 $5 {[%cal Rd8a5]} 18. Nxb7 Qxb7 $11) 18. Nxc6 Qxc6 19. g5 b4 20. Ne2 $1 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 21. Nf4 (21. h4 $1 $11) 21... Rfe8 (21... a4 $15) 22. Bh3 Bf8 $36 {[%mdl 2048] Black is more active.} 23. Nh5 (23. g6 $11 hxg6 24. Bxe6 fxe6 25. Nxg6) 23... g6 24. Nf6+ Nxf6 25. gxf6 (25. Bxf6 $15 Rec8 26. Rd2) 25... a4 26. Qh4 $2 {[#]} (26. Bf1 $17) 26... b3 $1 $19 {[%mdl 512]} 27. Rg2 (27. axb3 axb3) 27... bxa2+ 28. Ka1 e5 29. Bc3 Bc8 30. Bxc8 Rexc8 $2 (30... a3 $1 $19 31. Be6 Rxe6) 31. Rd3 (31. Bb4 $1 $15) 31... Rab8 $17 32. Qe1 Qc4 33. Qd2 Rb6 34. Rg3 Rcb8 35. Rg1 h5 36. Rd5 (36. Rd1 $17) 36... Kh7 $19 37. Rd1 Bh6 ({Black should try} 37... Qc8 $17 38. Kxa2 a3 $1 {[%mdl 512]}) 38. Qd3 $15 Qxd3 39. R5xd3 Bf4 40. h3 g5 (40... Kh6 $1 $15) 41. Rxd6 Kg6 42. Kxa2 (42. R6d3 {feels hotter.} Rc8 43. Kxa2 Rbc6 44. Ka3 Rc4 45. Rd5) 42... Rxd6 43. Rxd6 $11 {[%mdl 4096] Endgame KRB-KRB} Rc8 44. Ka3 Rc4 45. Ra6 g4 (45... Bc1 $5 {[%cal Rc4c3]} 46. Ka2 (46. Bxe5 Rc5 $11) 46... Bf4 $11) 46. fxg4 hxg4 47. hxg4 Rxe4 48. Rxa4 Re2 $1 49. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} Rxc2 50. Kb3 Rh2 $1 51. b5 {b6 is the strong threat.} Rh8 $1 52. Re4 Re8 53. Ba5 {And now Bc7 would win.} Rc8 54. Rc4 Rb8 55. Rc5 e4 56. Kc4 {aiming for Rf5.} (56. Rf5 $5 {[%cal Rf5f4]} Bg3 57. Kc2 $16) 56... e3 (56... Re8 $1 $11 {remains equal.}) 57. Kd3 $16 Re8 (57... Kxf6 $142 58. Rf5+ Kg6) 58. Ke2 $1 Rh8 (58... Bb8 $16 {was worth a try.} 59. Bc3 Ba7) 59. Rf5 Rh2+ 60. Kd3 Bg5 {[#]} (60... Bb8 $16 61. b6 (61. Kxe3 Rg2 $16) 61... e2) 61. Bc3 (61. b6 $1 $18) 61... Rh1 {[#]} (61... Rh3 $142) 62. Ke2 $2 ({White should play} 62. Re5 $1 $16) 62... Rc1 {The position is equal.} 63. Be1 Bxf6 64. Rd5 Bg5 65. Rd4 {Hoping for b6.} Rc2+ 66. Kf3 {Threatens to win with b6.} Rc1 67. Ke2 {Black must now prevent b6.} Rc2+ 68. Kf3 {Precision: White = 38%, Black = 55%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Fernandez Reyes, Lisandro"]
[Black "Pichot, Alan"]
[Result "0-1"]
[ECO "B47"]
[WhiteElo "2402"]
[BlackElo "2577"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,78,40,10,18,8,22,9,27,0,10,0,3,0,12,-16,0,-1,46,46,45,62,72,73,85,84,66,65,130,59,85,44,50,58,42,-82,-38,-48,-33,-161,-138,-141,0,0,0,0,52,45,8,-22,-37,-30,-29,-32,-32,-35,-43,-604,-595,-595,-589,-571,-587,-732,-732,-702,-717,-507,-712,-12840,-12840]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e6 5. Nc3 Qc7 6. Nb3 Nf6 {B47: Sicilian: Taimanov: 5 Nc3 Qc7 6 f4, 6 g3 and 6 Be2} 7. Bd3 a6 8. f4 d6 {The position is equal.} 9. Qe2 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 10. a4 b4 11. Nd1 Be7 12. Be3 $146 ({Predecessor:} 12. O-O Bb7 13. Nf2 e5 14. Ng4 O-O 15. Be3 Nxg4 16. Qxg4 exf4 17. Rxf4 {½-½ (43) Sokolov,A (2584)-Pelletier,Y (2589) France 2007}) 12... e5 13. f5 g6 {Threatening ...gxf5.} 14. g4 {[%cal Bg2g4,Bg4g5][%mdl 32]} d5 15. Nf2 d4 16. Bd2 h5 17. g5 Nd7 {[%cal Bf6d7,Bd7c5,Bc5d3][%mdl 32]} 18. h4 Na5 (18... Bb7 $14) 19. O-O (19. Nxa5 $16 {Threatens to win with Nb3.} Qxa5 20. Bc4) 19... Bb7 $14 20. Nh1 Nxb3 21. cxb3 Nc5 22. Rac1 (22. Bxb4 $14 Nxd3 23. Bxe7) 22... Qb6 23. a5 Qxa5 24. Ng3 ({White should try} 24. Bc4 $15) 24... Nxd3 25. Qxd3 {With the idea fxg6.} Qb5 (25... Qb6 $17 26. Kg2 a5) 26. Qxb5+ $1 $11 axb5 27. Rc7 $36 {[%mdl 2048] White has the initiative.} Rb8 (27... Bc8 $11) 28. fxg6 $14 fxg6 29. Rf6 Bxf6 30. gxf6 O-O 31. Rg7+ Kh8 32. Rxg6 Rf7 33. Bh6 $2 {[%mdl 8192] [#]} (33. Rg5 $15) 33... Kh7 $19 {Black is clearly winning.} 34. Rg5 {intending Bg7.} Rxf6 {White must now prevent ...d3.} 35. Bg7 Rg6 36. Rxg6 Kxg6 37. Bxe5 d3 {[#] Hoping for ...d2!} 38. Bf4 Rc8 39. Kf2 Rf8 {Precision: White = 33%, Black = 59%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Ynojosa Aponte, Felix Jose"]
[Black "Peralta, Fernando"]
[Result "1/2-1/2"]
[ECO "A18"]
[WhiteElo "2395"]
[BlackElo "2569"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,87,35,30,38,-8,12,-35,-42,-33,-43,-34,-32,-44,-39,-42,-44,-56,10,11,15,14,14,-5,-14,-78,-77,-87,-87,-87,-87,-87,-87,-87,-87,-87,-87,-81,-82,-83,-70,-84,-51,-59,-52,-54,0,-10,-6,-13,0,-8,0,-59,-53,-47,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-12842]} 1. c4 Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} e5 8. Nf3 Nc6 {A18: English Opening: Flohr-Mikenas System (1 c4 Nf6 2 Nc3 e6 3 e4)} 9. d5 {[#] Hoping for Bg5.} (9. dxe5 {is more complex.} Qg6 10. Be2 Bg4 11. O-O Rd8 12. Nd4) 9... e4 $146 ({Predecessor:} 9... Nb8 10. Bg5 Qd6 11. Bd3 Nd7 12. O-O f6 13. Be3 Nc5 14. Bxc5 Qxc5 15. Nd2 Qe7 16. Re1 {½-½ (68) Potkin,V (2621)-Karjakin,S (2771) Dubai 2014}) 10. dxc6 (10. Ng5 {with more complications.} Qxc3+ 11. Bd2 Qd4 12. Be2 h6 13. Nxf7 Kxf7 14. dxc6 bxc6 15. O-O) 10... exf3 {Black is slightly better.} 11. Qxf3 Qxf3 12. gxf3 bxc6 13. Be3 c5 14. Bd3 f5 15. Rb1 a6 (15... Bd7 $15) 16. Bf4 $11 Bd6 17. Bxd6 cxd6 18. Rb6 Kd7 19. Bxf5+ (19. Kd2 $11 {remains equal.}) 19... Kc7 $17 20. Be4 Kxb6 21. Bxa8 {[%mdl 4096] Endgame KRB-KRB} Be6 22. Bd5 Bxd5 23. cxd5 {[#] KR-KR} Kb5 $1 24. Rg1 Kc4 25. Kd2 g6 26. Rg4+ Kxd5 27. c4+ Ke6 28. Re4+ Kd7 29. Rf4 Ke6 30. Re4+ Kf6 31. Rf4+ $1 Ke7 32. Re4+ Kd7 (32... Kf7 $11) 33. Rf4 $1 $15 Rb8 34. Rf7+ Ke6 35. Rxh7 {The position is equal.} Rb2+ 36. Ke3 Rxa2 37. Rg7 Kf6 38. Rd7 $1 Ke6 39. Rg7 Kf6 40. Rd7 $1 Ke5 41. f4+ Ke6 42. Rg7 Kf6 43. Rd7 Ke6 44. Ke4 $2 {[%mdl 40960] Precision: White = 60%, Black = 70%. . An unexpected result.} (44. Rg7 $11) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Sanchez, Sebastian Felipe"]
[Black "Kaidanov, Gregory S"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "2388"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "132"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,132,-11,0,0,0,0,0,0,2,0,0,0,0,0,-7,-13,0,0,0,0,19,6,6,2,21,0,0,-6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-10,-8,0,0,0,-41,0,0,0,0,0,0,0,0,0,0,0,-34,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-12829,-8823,-12845,-12843,-12845,-12842,-12842,-12843,-12843,-12843,-12844,-12843,-12844,-12844,-12845,-12845,-12846,-12846,-12846,-12847,-12847,-12847,-12848,-12848,-12849,-12848]} 1. c4 e6 2. Nf3 d5 3. g3 Nf6 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 a6 7. Qc2 c5 8. O-O b6 9. b3 {A13: English Opening: 1...e6} Bb7 10. Bb2 Be7 11. d3 {The position is equal.} O-O 12. Nbd2 Rc8 13. Rac1 b5 14. Qb1 Qb6 15. Qa1 Rfd8 {[#]} 16. a3 $146 Ne8 17. Rc2 Nf8 18. Rfc1 f6 19. d4 Rc7 20. e3 Rdc8 21. dxc5 Bxc5 22. Bd4 Nd7 {[%cal Bf8d7,Bd7c5,Bc5e4][%mdl 32]} 23. Bxc5 Nxc5 24. b4 Ne4 25. Qd4 Qxd4 26. Nxd4 Rxc2 27. Rxc2 Rxc2 28. Nxc2 N8d6 29. Nxe4 Bxe4 30. Bxe4 Nxe4 $11 {[%mdl 4096] Endgame KN-KN} 31. Nd4 Kf7 32. Nc6 Nd2 33. Nb8 Nc4 34. Nxa6 Nxa3 35. Kf1 Ke7 36. Ke2 Kd6 37. Kd3 Nc4 38. f4 f5 39. Nc5 Kd5 40. h3 e5 41. e4+ fxe4+ 42. Nxe4 Nb2+ 43. Ke3 exf4+ 44. gxf4 Kc4 45. f5 Kxb4 {aiming for ...Kb3.} 46. h4 Ka3 47. Kd4 b4 {Strongly threatening ...Kb3.} 48. h5 h6 49. f6 gxf6 50. Nxf6 Na4 (50... b3 $5 51. Ne4 $8 Nd1 $11) 51. Ne4 Nb6 {Hoping for ...b3.} (51... b3 $5 52. Nd2 $8 b2 53. Nc4+ Kb3 $11) 52. Kc5 Nc8 {...Ne7 is the strong threat.} 53. Kd5 Kb3 {And now ...Nb6+ would win.} 54. Kc5 $2 {[%mdl 8192] [#]} (54. Ke6 $11) 54... Ne7 $1 $19 {[%cal Re7f5] Black is clearly winning.} 55. Kb5 Ka3 56. Kc4 b3 {[%cal Bb4b3,Bb3b2][%mdl 32]} 57. Nd2 b2 58. Kd4 Ka2 59. Ke5 Nc6+ 60. Kd5 Na5 61. Ne4 Kb3 62. Kd4 Kc2 63. Nc3 Nb3+ 64. Kc4 Nd2+ 65. Kd4 {[#]} Ne4 $1 {[%mdl 512]} 66. Nb5 (66. Nxe4 b1=Q) 66... Kb3 {Precision: White = 76%, Black = 72%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Umetsubo, Cesar Hidemitsu"]
[Black "Cruz, Cristhian"]
[Result "1-0"]
[ECO "E24"]
[WhiteElo "2381"]
[BlackElo "2558"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,119,0,0,0,0,0,-17,-22,-15,-4,-4,-7,0,0,0,0,-10,0,-9,0,0,12,0,0,0,0,9,24,12,26,26,27,23,39,38,80,80,80,75,76,87,73,41,69,47,85,65,78,72,93,86,114,28,44,18,16,20,18,18,93,96,54,81,159,127,168,158,139,0,23,0,0,0,0,0,0,0,336,416,415,392,366,391,370,368,306,250,518,431,758,758,12841,12842,12845,12845,12847,12847,12847,12847,12848,12847,12847,12847,12848,12848,12850,12850]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 b6 6. f3 Ba6 7. e4 Nc6 8. Bg5 h6 {E24: Nimzo-Indian: Sämisch: Unusual Black 5th moves and 5...c5 sidelines} 9. Bh4 $1 Na5 (9... g5 10. Bf2 Qe7 11. h4 O-O-O 12. d5 Na5 13. c5 Bxf1 14. d6 cxd6 15. cxd6 Qf8 16. Kxf1 {½-½ (37) Carlsen,M (2690)-Leko,P (2749) Monte Carlo 2007}) 10. Qa4 (10. e5 $5 {[%cal Re5f6]} g5 11. Bf2 $14) 10... Qc8 {The position is equal.} 11. Nh3 {[%cal Bg1h3,Bh3f2,Bf2g4][%mdl 32]} Qb7 {With the idea ...Nxe4!} 12. Nf2 Qc6 13. Qxc6 dxc6 14. Bxf6 gxf6 15. Ng4 $1 {[#]} Bxc4 $146 ({Predecessor:} 15... Ke7 16. Ne3 {1-0 (79) Volkov,S (2628)-Ovetchkin,R (2543) playchess.com INT 2006}) 16. Nxf6+ Ke7 17. Ng4 Rad8 18. Ne3 Bb3 19. g4 Rd6 20. h4 Rhd8 (20... c5 $5 {[%cal Rc5d4]}) 21. g5 c5 22. d5 Rh8 23. f4 hxg5 24. fxg5 c6 {[%cal Rc6d5]} 25. e5 Rxd5 26. Nxd5+ cxd5 27. Kf2 Bc2 28. Kg3 Nb3 29. Ra2 Bg6 30. Be2 c4 31. h5 Be4 32. Bf3 Nc5 33. Re2 (33. Bxe4 $1 $16 Nxe4+ 34. Kf4) 33... Bf5 $11 34. Re3 Rg8 35. Kh4 $1 Rd8 36. h6 d4 (36... b5 $11 {remains equal.}) 37. cxd4 $16 Rxd4+ 38. Kg3 Bh7 ({Black should play} 38... Rd8) 39. Rh4 Rxh4 40. Kxh4 {[%mdl 4096] Endgame KRB-KBN} b5 41. Bc6 (41. Be2 $16) 41... a6 $11 42. Kg3 Kf8 $1 43. Kf2 Bd3 $1 44. Rh3 {h7 is the strong threat.} Kg8 {White must now prevent ...c3.} 45. Be8 $1 Kh7 $2 {[%mdl 8192]} (45... c3 $11 46. Bxf7+ Kxf7) 46. Bxf7 $18 {aiming for g6+!} Ne4+ {[#]} 47. Ke3 $1 {White wants to mate with g6+.} Nxg5 {[#]} 48. Bg8+ $1 {[%mdl 512]} Kxg8 49. Rg3 Kh7 50. Rxg5 Kxh6 $2 {KR-KB} (50... Bg6 51. Rg3 c3) 51. Rg8 {White is clearly winning.} a5 (51... Bg6 $142 52. Ra8 Kg5 53. Rxa6 Kf5) 52. Rb8 b4 53. axb4 axb4 54. Rxb4 Kg5 55. Rb8 Kf5 56. Kd4 Kf4 57. Rf8+ Bf5 58. Rc8 Bd3 59. Rc7 Kf3 60. Rc6 {Precision: White = 69%, Black = 50%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Valenzuela Gomez, Fernando"]
[Black "Cuartas, Jaime Alexander"]
[Result "0-1"]
[ECO "D08"]
[WhiteElo "2377"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,81,79,72,72,63,60,63,60,45,43,39,62,90,56,86,115,96,0,43,27,23,0,0,-33,-31,-33,-16,-71,-48,-59,-73,-62,-56,-78,-50,-74,-77,-81,-67,-88,-93,-82,-89,-124,-126,-131,-138,-180,-170,-180,-152,-228,-198,-213,-199,-814,-854,-1721,-1718,-29985,-29986,-29992,-29993,-29999]} 1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. a3 Nge7 6. b4 {[%cal Bb2b4,Bb4b5][%mdl 32] D08: Albin Counter Gambit} Ng6 7. Bb2 a5 8. b5 Ncxe5 9. Nxe5 Nxe5 10. e3 (10. Qxd4 Qxd4 11. Bxd4 Nxc4 12. e3 Be6 13. Be2 {0-1 (30) Wojtaszek,R (2749)-Morozevich,A (2676) Doha 2016}) 10... Be6 {LiveBook: 25 Games} 11. Bxd4 Nxc4 12. Qc2 Nd6 13. Bd3 {[#]} Qg5 $146 14. f4 Qh4+ 15. g3 Qh5 16. Nc3 Rd8 17. O-O {[#] And now f5 would win.} Nf5 18. Ne2 (18. Bxf5 $16 Qxf5 19. e4) 18... Nxd4 19. Nxd4 Qc5 20. Qb2 (20. Rfc1 $5 {[%cal Rc2c5]} Qxc2 21. Rxc2 $14) 20... Qb6 21. Be4 Bc5 {[%cal Rd8d4] [#] Threatens to win with ...Rxd4.} 22. Rad1 O-O (22... Bg4 $5 {[%cal Rg4d1]} 23. Rd2 O-O $15) 23. a4 (23. Nxe6 $11 Qxe6 24. Qc2) 23... Bc8 24. Nf5 Bxf5 25. Bxf5 Bxe3+ 26. Kh1 c5 27. Qc2 g6 28. Be4 Qc7 29. f5 {[%cal Rf5g6]} Bd4 30. fxg6 hxg6 {[%cal Bh7g6,Bg6g5][%mdl 32]} 31. Qc4 Kg7 32. Bd5 Qd7 33. Bg2 Rh8 {( -> ...Rxh2+!)} 34. h4 g5 35. Rd3 (35. Qc2 $17) 35... f6 36. Qc1 {If White can now play Rxf6! this consolidates a bit.} Qg4 $40 {[%mdl 128] Black wants a kill.} 37. Rff3 $2 (37. Qd1 Qxd1 38. Rfxd1) 37... gxh4 $19 38. gxh4 Rxh4+ 39. Rh3 Rdh8 {Black mates.} 40. Qa3 Rxh3+ 41. Bxh3 Qg1# {Precision: White = 30%, Black = 82%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Lopez Gonzalez, Abel Fabian"]
[Black "Vera Siguenas, Deivy"]
[Result "0-1"]
[ECO "B13"]
[WhiteElo "2351"]
[BlackElo "2526"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,68,62,66,-1,37,37,50,2,0,2,3,0,0,-69,-71,-70,0,0,0,0,0,0,0,-87,-8,-32,-6,-11,-13,-22,42,-46,-47,-46,-45,-310,-302,-302,-296,-695,-695,-679,-683,-676,-657,-627,-492,-981,-963,-6539,-6459,-5594,-5562,-29995,-29996]} 1. e4 c6 2. d4 d5 3. exd5 cxd5 4. c4 Nf6 5. Nc3 Nc6 6. Bg5 Be6 7. a3 h6 {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack} (7... Qd7 8. Be2 Rd8 9. Bxf6 exf6 10. c5 g6 11. b4 a6 12. b5 axb5 13. Nxb5 Be7 14. Nf3 O-O 15. O-O Ra8 16. Rb1 Rfe8 17. Qd2 {½-½ (17) Amin,B (2654)-Dreev,A (2664) Helsingor 2016}) 8. Bxf6 exf6 {LiveBook: 4 Games} 9. c5 (9. cxd5 $14 Bxd5 10. Qe2+ Ne7 11. Nf3) 9... f5 $146 {The position is equal.} ({Predecessor:} 9... Be7 10. Bb5 O-O 11. Nge2 Qc7 12. O-O f5 13. f4 Rad8 14. b4 Nb8 15. Qd2 {1-0 (82) Kosten,A (2497)-Franca,R (2304) France 2009}) 10. Bb5 g5 11. Nge2 (11. f4 $5) 11... f4 12. Qd3 Bg7 13. Ba4 (13. h4 $5) 13... Qf6 14. Nb5 (14. Rd1 $11) 14... O-O $1 $15 15. Bc2 {[%csl Gc2][%cal Rd3h7]} Rfd8 ({Of course not} 15... Qg6 $6 16. Qxg6 fxg6 17. Nc7 $11) (15... Rfe8 $1 $15 16. O-O-O Bf5 17. Qxf5 Qxf5 18. Bxf5 Rxe2) 16. Rd1 $11 Ne7 17. Nd6 $36 {[%mdl 2048] Black is under pressure.} Rxd6 18. cxd6 Nf5 19. h4 (19. O-O $11) 19... Nxd6 ({Black should play} 19... Nxh4 $17 {Strongly threatening ...Bf5.} 20. Kf1 Bg4) 20. hxg5 hxg5 21. Qf3 Re8 22. Kf1 Bd7 (22... Nc4 $11) 23. a4 ({Don't go for} 23. Qxd5 $2 Bc6 $19) ({Better is} 23. Nc3 $14) 23... Ne4 $15 24. g3 {[%cal Rg3f4]} Qc6 25. Bb3 $2 {[%mdl 8192] [#]} (25. Nc3 $1 $15) 25... Qc8 $1 $19 {And now ...Bg4 would win.} 26. Bxd5 Bg4 27. Qd3 $2 (27. Qxe4 Rxe4 28. Bxe4) 27... Bxe2+ 28. Qxe2 {[#]} Nxg3+ $1 {[%mdl 512]} 29. fxg3 Rxe2 30. Kxe2 Qg4+ 31. Bf3 (31. Kd3 $142 Qd7 32. Kc4) 31... Qe6+ 32. Kf2 Qe3+ 33. Kg2 g4 34. Bxb7 f3+ {Precision: White = 34%, Black = 63%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.17"]
[Round "10"]
[White "Rios Parra, Alejandro"]
[Black "Tang, Andrew"]
[Result "1/2-1/2"]
[ECO "C75"]
[WhiteElo "2345"]
[BlackElo "2461"]
[Annotator "TA"]
[PlyCount "162"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,162,47,36,41,37,56,34,30,-17,23,25,15,22,21,12,37,0,0,0,0,0,18,2,14,-1,0,-3,31,12,22,20,30,39,40,31,31,24,42,0,10,0,8,0,15,-8,0,-18,-13,-14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-18,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-9,-9,-9,-9,-9,-9,-19,-19,-19,-9,-9,-9,-9,-9,-9,-5,-9,-9,-9,-9,-9,0,0,0,-9,0,-9,-5,-5,-5,-5,-5,-5,-5,-5,-5,-9,-9,-9,-5,-9,0,-9,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 {[%cal Bf1b5,Bb5a4,Ba4b3][%mdl 32]} a6 4. Ba4 d6 5. c3 Bd7 6. d4 Nf6 7. Nbd2 g6 {C75: Ruy Lopez: Deferred Steinitz: 5 c3 Bd7 6 d4 without ...g6} 8. O-O b5 9. Bb3 {[#] Ng5 is the strong threat.} (9. Bc2 Bg7 10. dxe5 dxe5 11. Nb3 O-O 12. Be3 Qc8 13. Nc5 Rd8 14. Qe2 Be8 15. a4 Nh5 16. Bd3 bxa4 17. Bxa6 Qb8 18. Bb5 a3 19. Na6 axb2 20. Qxb2 {½-½ (20) Tari,A (2596)-Motylev,A (2663) Moscow 2017}) 9... Bg7 {White is slightly better.} 10. Qe2 $146 ({Predecessor:} 10. dxe5 dxe5 11. Re1 Qe7 12. Nf1 Na5 13. Bc2 Rd8 14. Bg5 h6 15. Bh4 {1-0 (47) Todorovic,J (2417)-Batricevic,S (2267) Niksic 2014}) 10... O-O (10... exd4 {keeps more tension.} 11. cxd4 O-O 12. h3 Re8 13. Qd1 a5) 11. dxe5 Nxe5 12. Nxe5 dxe5 13. Rd1 c5 14. Nf1 {[%cal Bd2f1,Bf1e3,Be3d5][%mdl 32]} c4 15. Bc2 Qc7 16. Bg5 Bc6 (16... Bg4 $5 {[%cal Rg4e2]} 17. f3 Be6 $11) 17. a4 h6 18. Bxf6 Bxf6 19. Ne3 Qb7 20. Nd5 Bg7 (20... Be7 $5) 21. b3 cxb3 22. Bxb3 Rfd8 23. axb5 axb5 24. g3 Kh8 25. c4 bxc4 {The position is equal.} 26. Qxc4 Rac8 {[#] Hoping for ...Bxd5.} 27. Qd3 f5 28. f3 Rf8 {[%cal Bd8f8,Bf8f7,Bf7b7][%mdl 32]} 29. Ra2 fxe4 30. fxe4 Rf7 31. Bc4 Rcf8 32. Qb3 Qxb3 33. Bxb3 Rb7 34. Bc4 Bd7 35. Rda1 Kh7 36. Ra7 Rfb8 37. Rxb7 Rxb7 38. h4 h5 39. Ra2 Kh6 40. Rf2 Be6 41. Kg2 Ra7 42. Ra2 (42. Ne3 $5 {[%cal Rc4e6]} Bc8 43. Bd5 $11) 42... Rb7 43. Rf2 Rb8 44. Rc2 Bd7 45. Ne3 Bf8 46. Bd5 Bd6 47. Bf7 Ba4 48. Ra2 Bb5 49. Bc4 Be8 50. Bd5 Bc5 51. Nc4 Bd4 52. Ra8 (52. Ra6 {is interesting.} Bd7 53. Rf6 Bg4 54. Nd6 Rb2+ 55. Kh1) 52... Rxa8 53. Bxa8 $11 {[%mdl 4096] Endgame KBB-KBN} Ba4 54. Bd5 Kg7 55. Nd2 Kf6 56. Nf3 Bc3 57. Ng5 Bc2 58. Nh7+ Ke7 59. Ng5 Bb2 60. Nh7 Bc1 61. Ng5 Bb1 62. Nh7 Kd6 63. Kf3 Ke7 64. Ng5 Bc2 65. Kf2 Bd1 66. Nh7 Bg4 67. Ng5 Bb2 68. Bf7 Bd4+ 69. Kg2 Kf6 {Threatens to win with ...Be3.} 70. Bd5 Be3 71. Nh7+ Ke7 72. Ng5 Bc1 73. Nh7 Bh6 74. Ng5 Bd1 75. Kf2 Ba4 76. Kf3 Be8 77. Kf2 Bg7 78. Kf3 Bf6 79. Nh7 Bg7 80. Ng5 Bf6 81. Nh7 Bg7 {Precision: White = 63%, Black = 52%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Iturrizaga Bonelli, Eduardo"]
[Black "Fier, Alexandr"]
[Result "1/2-1/2"]
[ECO "A15"]
[WhiteElo "2663"]
[BlackElo "2576"]
[Annotator "TA"]
[PlyCount "39"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,39,10,12,0,0,0,-2,27,21,31,21,29,22,37,26,27,26,35,31,31,26,54,42,54,43,65,60,64,44,41,23]} 1. c4 Nf6 2. g3 c5 3. Bg2 g6 4. Nc3 Bg7 5. Nh3 Nc6 6. Nf4 {LiveBook: 6 Games. A36: Symmetrical English vs ...g6: 4 Bg2 Bg7} a6 $146 ({Predecessor:} 6... O-O 7. O-O d6 8. b3 Rb8 9. Bb2 a6 {½-½ (9) Akopian,V (2654)-Minasian,A (2554) Ohrid 2001}) 7. e3 d6 8. d4 {The position is equal.} Nd7 {[%cal Rc5d4]} 9. Nfe2 O-O 10. O-O Rb8 11. b3 Na5 12. a4 e6 13. Rb1 b6 14. Qc2 Qe7 15. Rd1 Bb7 16. d5 {White is slightly better.} e5 17. e4 {[%cal Be3e4,Be4f5][%mdl 32]} Rbe8 18. Re1 Bc8 19. Nd1 f5 20. exf5 {Precision: White = 77%, Black = 60%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Cordova, Emilio"]
[Black "Flores, Diego"]
[Result "1/2-1/2"]
[ECO "A04"]
[WhiteElo "2651"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "174"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,174,-37,20,14,12,10,0,0,0,0,39,22,47,41,50,43,60,23,43,41,67,6,78,74,78,77,67,61,69,66,77,59,64,62,59,48,70,62,98,93,87,63,79,89,80,45,41,49,55,42,41,43,70,70,76,68,74,57,48,36,72,52,75,78,100,99,148,114,102,47,47,39,63,75,89,90,90,69,89,88,90,93,91,67,64,64,250,229,331,316,466,441,424,443,551,539,521,368,424,452,385,-25,-25,-322,-258,-903,-880,-820,-822,-1150,-1136,-996,-872,-776,-337,-199,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-3,-3,-10,-21,-21,-29,-28,-110,-118,-125,-127,-173,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 c5 2. c4 g6 3. d4 cxd4 4. Nxd4 Nc6 5. g3 Bg7 6. Nb3 {A30: Symmetrical English: Double Fianchetto and Hedgehog} (6. e3 d5 7. Nb5 a6 8. cxd5 axb5 9. dxc6 Qxd1+ 10. Kxd1 bxc6 11. Bg2 Bb7 12. Kc2 Nf6 13. Bd2 Nd5 {½-½ (41) Ponkratov,P (2589)-Alekseev,E (2636) Sochi 2016}) 6... a5 {LiveBook: 6 Games} (6... d6 $15) 7. Nc5 $11 d6 8. Na4 Be6 9. Na3 Nf6 10. Bg2 O-O $146 ({Predecessor:} 10... Nd7 11. Be3 O-O 12. O-O Rb8 13. Rc1 Nb4 {0-1 (59) Bykov,O (2332)-Esenov,A (2302) Moscow 2017}) 11. O-O Rc8 12. Be3 Nd7 13. Qd2 b6 14. Rac1 Nc5 15. Nc3 Nb4 16. b3 (16. Bh6 $14) 16... Bd7 (16... Bxc3 $1 $11 17. Rxc3 Qd7) 17. Nab5 $16 Bc6 18. Bxc6 Nxc6 19. Nd5 Rb8 20. Rfd1 Rb7 21. Bh6 Bxh6 22. Qxh6 Rd7 23. Qh4 (23. Ndc3 {with more complications.} Ne5 24. f3 e6 25. Rd2 Qe7 26. Kg2) 23... f5 24. Rb1 Ne4 25. f3 Nf6 26. Nf4 {Strongly threatening Ne6.} Qc8 27. Ne6 Rf7 28. a3 Nd8 29. Nf4 Kg7 30. b4 axb4 31. axb4 h6 {Hoping for ...g5.} 32. Nd5 Rb7 33. Qd4 $36 {[%mdl 2048] Black is under pressure.} Nc6 34. Qc3 ({Not} 34. Nxb6 $2 Qb8 $19) 34... Ne5 35. Rbc1 Kh7 36. Qd4 Nc6 37. Qe3 Qd8 38. Ra1 Rb8 39. Qc3 Rc8 40. Na7 ({White should play} 40. Qb3 $16) 40... Nxd5 $14 41. Rxd5 Nxa7 42. Rxa7 Rc7 43. Rxc7 Qxc7 $16 {[%mdl 4096] Endgame KQR-KQR} 44. Rb5 Rf8 45. Qe3 Qxc4 46. Rxb6 Qc7 47. b5 Qa7 48. Kf2 g5 $2 (48... Kg8 $14) 49. Ra6 $18 Qxe3+ (49... Qc5 $142 50. Qxc5 dxc5) 50. Kxe3 {KR-KR} Rc8 (50... f4+ {might work better.} 51. gxf4 Rxf4) 51. Rc6 $1 {[%cal Rc6c8]} Rb8 52. b6 Kg7 53. Kd4 Kf6 54. Kc4 Ke5 55. Kb5 Kd4 56. e4 $2 (56. Ka6 $18) 56... g4 $1 $11 {[%cal Rg4f3]} 57. fxg4 $2 {[%mdl 8192]} (57. f4 $11 {and White stays safe.} fxe4 58. Rc7) 57... fxe4 $19 58. Rc7 $2 (58. Ka6 e3 59. Rc7) 58... e5 59. Rc4+ Kd3 60. Ra4 e3 61. Kc6 e2 62. Ra1 {[#]} Kd2 (62... d5 $142 $1 {[%mdl 512]} 63. Kc7 (63. Kxd5 Rxb6) 63... Rf8) 63. Kc7 {[#]} (63. h4 {only move.} d5 64. Kc7) 63... Rg8 $2 ({Black should try} 63... Re8 $1 $19 64. h4 e1=Q 65. Rxe1 Kxe1) 64. b7 $11 Rg7+ 65. Kc6 $1 Rg8 66. h4 e1=Q ({And not} 66... e1=R 67. Ra8 $18) 67. Rxe1 Kxe1 68. g5 $1 {[%cal Rg5h6]} hxg5 69. hxg5 {KR-K3P} Kf2 70. Kc7 e4 {Threatens to win with ...e3.} 71. b8=Q Rxb8 72. Kxb8 {KPP-KPP} e3 {And now ...e2 would win.} 73. g6 e2 74. g7 e1=Q 75. g8=Q {KQ-KQ} Qe5 {...d5+ is the strong threat.} 76. g4 (76. Qf7+ $11 {keeps the balance.} Kxg3 77. Qb3+ Kf4 78. Qf7+ Qf5 79. Qc4+ Qe4 80. Qc1+ Qe3 81. Qc4+ Ke5 82. Qg4) 76... d5+ $17 77. Kb7 {[#]} d4 $1 {[%cal Rd4d3] White must now prevent ...d3.} 78. Qc4 Qe3 $2 (78... Qe4+ $19 79. Kb6 Qe3 80. Qc2+ Kg3 81. Qc7+ Kxg4 82. Qd7+ Kg3 83. Qc7+ Kf3 84. Qc6+ Qe4) 79. g5 $11 {The position is equal.} d3 80. Qh4+ Ke2 81. Qg4+ Ke1 {aiming for ...d2.} (81... Kf1 $5 82. g6 $8 d2 $11) 82. Qh4+ Ke2 83. Qg4+ Qf3+ 84. Qxf3+ Kxf3 85. g6 d2 86. g7 d1=Q {( -> ...Qd7+)} 87. g8=Q Ke4 {Precision: White = 52%, Black = 45%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Bruzon Batista, Lazaro"]
[Black "Erenburg, Sergey"]
[Result "1-0"]
[ECO "D10"]
[WhiteElo "2650"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,99,23,13,23,28,31,20,25,17,27,18,22,2,32,17,30,26,18,-19,-33,-45,82,48,103,93,109,100,108,95,93,77,64,66,67,66,77,81,78,71,93,77,76,83,88,86,105,72,69,61,76,0,62,53,100,86,129,138,134,120,243,229,452,447,431,325,325,297,300,262,431,431,431,431,442,438,393,426,416,417,504,509,504,504,588,590,581,555,983,978]} 1. c4 c6 2. d4 d5 3. cxd5 cxd5 4. Bg5 (4. Nf3 Nc6 5. Nc3 Nf6 6. Bf4 Nh5 7. Bd2 g6 8. e3 e6 9. Bb5 Bd7 10. Ne5 Nxe5 11. dxe5 Bxb5 12. Nxb5 a6 13. Nd4 Bc5 14. Nb3 Be7 {0-1 (60) Shimanov,A (2642)-Fedoseev,V (2690) Minsk 2017}) 4... Nc6 5. Nc3 Qb6 6. Qd2 {D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3} e6 7. e3 {LiveBook: 3 Games} Nge7 $146 {[%cal Bg8e7,Be7f5,Bf5h4][%mdl 32]} (7... h6 $5 {[%cal Rh6g5]} 8. Bf4 Nf6 $11) ({Predecessor:} 7... h6 8. Bh4 Bd7 9. Nf3 Nf6 10. Bxf6 gxf6 11. Bd3 f5 {1-0 (64) Nabaty,T (2586)-Cerveny,M (2357) Pardubice 2013}) 8. Bf4 {White has an edge.} Nf5 9. Bd3 Nh4 10. Bg3 Be7 11. f3 (11. Bxh4 $5 Bxh4 12. Nf3 $14) 11... O-O 12. Qf2 $36 {[%mdl 2048] Black is under pressure.} g6 (12... Nb4 $5 {[%cal Rb4d3]} 13. Bb1 Ng6 $11) 13. Rd1 Nf5 14. Bxf5 exf5 15. Nxd5 Qa5+ 16. Nc3 Nb4 (16... b5 $1 $15 {keeps the upper hand.} 17. a3 Ba6) 17. Nge2 Nc2+ {[#]} (17... Be6 $14) 18. Kf1 $1 $16 {[%cal Be1f1,Bf1g1,Bg1h2][%mdl 32]} Be6 19. Nf4 Bc4+ 20. Kg1 Nb4 21. a3 Na2 22. Nxa2 Bxa2 23. h4 Bb3 24. Rc1 Rac8 25. Kh2 Rfe8 26. Rhe1 Bf8 27. Nd3 Qb5 28. Qd2 a5 29. Nf4 a4 30. Ne2 Qd7 31. Nf4 Qb5 32. Nd3 b6 33. Nb4 Bh6 34. Rxc8 Rxc8 35. d5 Qc4 (35... Qc5 $16 36. Bf4 Bg7) 36. d6 $18 Qe6 $2 {[#]} (36... f6 {might work better.} 37. h5 gxh5) 37. Nc6 $1 {[%mdl 512] Ne7+ is the strong threat.} Bf8 (37... Rxc6 38. d7) 38. d7 Qxc6 39. dxc8=Q Qxc8 40. Rc1 Bc4 $2 {[#]} (40... Bc5 {keeps fighting.} 41. Qd4 Qe6 42. Qd8+ Kg7) 41. Qd5 $1 {[%mdl 512]} Bxd5 42. Rxc8 {[%mdl 4096] Endgame KRB-KB} Kg7 43. Be5+ f6 {[#]} 44. Bxf6+ $1 {[%mdl 512]} Kf7 (44... Kxf6 45. Rxf8+) 45. Bd4 b5 46. Rc7+ {White is clearly winning.} Kg8 {And now ...Bd6+ would win.} 47. Kg1 h5 48. Kf2 Bc4 49. Rc6 Kh7 50. Rc8 {Precision: White = 55%, Black = 39%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Kovalyov, Anton"]
[Black "Fernandez, Fernando"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2643"]
[BlackElo "2416"]
[Annotator "TA"]
[PlyCount "165"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,165,18,8,31,16,22,0,16,0,99,72,71,71,70,70,91,93,134,145,141,172,226,143,121,59,79,62,67,72,75,70,70,0,0,-7,0,0,0,-160,-162,-253,-151,-178,0,-97,-30,-85,-81,-58,0,0,2,0,0,0,46,57,51,51,54,43,51,53,59,30,60,60,57,57,58,60,58,35,103,16,68,43,36,35,38,5,7,9,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,37,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,12845,12845,12847,12847,12850,12850,12851,29976,29976,29977]} 1. c4 e6 2. g3 d5 3. Bg2 Nf6 4. Nf3 Be7 5. O-O O-O 6. d4 c6 7. Qc2 b6 8. Rd1 Nbd7 9. b3 h6 {E08: Closed Catalan: Main Line: 7 Qc2} 10. Nc3 (10. Bb2 Bb7 11. Nc3 Qc7 12. Rac1 Rac8 13. e4 dxe4 14. Nxe4 c5 15. Nxf6+ Nxf6 16. dxc5 Bxc5 17. Ne5 Bxg2 18. Kxg2 {0-1 (45) Cheparinov,I (2677)-Harikrishna,P (2752) Monzon 2016}) 10... Ba6 11. Nd2 Rc8 {The position is equal.} 12. e4 $146 ({Predecessor:} 12. a4 Bb4 13. e4 e5 14. dxe5 Nxe5 15. exd5 cxd5 16. Nxd5 Nxd5 {1-0 (31) Kopsa,P-Van Gool,J (2057) ICCF email 2007}) 12... dxc4 (12... c5 $1 $11 13. exd5 cxd4 14. dxe6 fxe6) 13. Nxc4 b5 14. Ne3 $1 Qb6 15. a3 c5 16. d5 c4 17. bxc4 $1 bxc4 18. Rb1 Qc5 (18... Qc7 $142 19. Bh3 Nc5) 19. Qa4 Qd6 {intending ...Nc5.} 20. dxe6 (20. f4 $16) 20... Qxe6 $14 21. Ned5 (21. Nf5 $5 {[%cal Rf5e7]} Nc5 22. Qc2 $16) 21... Nc5 $1 {[%cal Rc5a4]} 22. Nxe7+ Qxe7 23. Qa5 Bb7 {[%cal Rf6e4]} 24. Bf4 (24. f3 $1 $14) 24... Bxe4 25. Re1 Rfe8 26. Nxe4 Ncxe4 27. Rb5 $2 (27. Bxe4 $11 Nxe4 28. f3 Qc5+ 29. Qxc5 Nxc5 30. Rxe8+ Rxe8 31. Rc1) 27... Qd7 $17 28. Rbb1 {[#]} (28. Bxe4 {is a better defense.} Nxe4 29. Rd5) 28... c3 (28... Nxf2 $1 $19 {[%mdl 512]} 29. Kxf2 Qd4+ 30. Kf3 g5) 29. Rbd1 {[#]} Qe7 $2 (29... Nd2 $1 $19 {[%mdl 512]} 30. Rxe8+ (30. Bxd2 Rxe1+) 30... Qxe8) 30. Be3 (30. Rd4 $11 {remains equal.}) 30... Qc7 ({Better is} 30... c2 $17 31. Rc1 Qb7 32. Qxa7 Qb3) 31. Qxa7 (31. Qxc7 $11 {was the only way to keep the balance.} Rxc7 32. Bf4) 31... Qxa7 32. Bxa7 Ra8 ({Black should play} 32... Nd2 $1 $15 33. Rxe8+ Rxe8) 33. Bd4 $11 Rxa3 34. Rc1 Rd8 35. Be5 Nc5 {next ...Nd3 is good for Black.} 36. Bxc3 Ne6 37. h4 Ra6 38. Bh3 Rad6 39. Be5 Ra6 40. Rb1 Nc5 41. Rb5 Ne6 42. Kg2 Nd7 43. Bc3 Ndc5 44. h5 Ra2 (44... Nd3 $14) 45. Re3 (45. Ba5 $16 Rf8 46. Bb6) 45... Ra3 (45... Nd3 $11 46. Ba5 Ra8 47. Bxe6 (47. Rxd3 R2xa5 48. Rdd5 Rxb5 $14) 47... fxe6 48. Rxd3 R2xa5) 46. Ba5 Rxe3 47. Bxd8 Re5 48. f4 Re2+ 49. Kf1 {aiming for Rxc5.} Re3 $132 {[%mdl 2048] Black is not keeping still} 50. Bh4 (50. Bxe6 $5 Nxe6 51. Kf2 $11) 50... g5 51. hxg6 fxg6 52. Kf2 Rc3 53. Bxe6+ Nxe6 {[%mdl 4096] Endgame KRB-KRN} 54. Bf6 Rc5 55. Rb7 Rc7 56. Rb8+ Kf7 57. Be5 Rc2+ 58. Ke3 h5 59. Rb7+ Ke8 60. Bd6 Kd8 61. Re7 Nc7 {Strongly threatening ...Nd5+.} 62. Rg7 (62. Rf7 {seems wilder.} Rc3+ 63. Kf2 Rc2+ 64. Kf3 Rc3+ 65. Kg2) 62... Ne8 63. Rxg6 (63. Rg8 {keeps more tension.} Kd7 64. Bb4 Rb2 65. Ba5 Nd6 66. Kf3) 63... Nxd6 64. Rxd6+ {KR-KR} Ke7 65. Rd5 (65. Rh6 {is interesting.} Rg2 66. Kf3 Rh2 67. Ke4 Rg2 68. Kf3) 65... Rh2 66. Rf5 Ke6 67. Rf8 Ke7 68. Rh8 Kf6 69. Rh6+ (69. g4 $5 Rh3+ 70. Kf2 hxg4 71. Rxh3 gxh3 72. Kg3 $11) 69... Kg7 70. Rd6 (70. Rb6 {is more complex.} Ra2 71. Rb3 Kg6 72. Rd3 Rb2 73. Ra3) 70... Rh1 71. f5 Rf1 72. Ke4 (72. g4 $5) 72... Rf2 73. Rg6+ (73. g4 $5 hxg4 74. Rg6+ Kf7 75. Rxg4 $11) 73... Kf7 74. Rh6 Rh2 75. Ra6 {Rh6 is the strong threat.} (75. g4 $5 Rh4 76. Ke5 (76. Rxh5 Rxg4+ 77. Ke5 Rb4 $11) 76... Rxg4 77. Rh7+ (77. Rxh5 Rb4 $11) 77... Kg8 78. Rxh5 $16) 75... Rf2 76. Rb6 (76. g4 $5 hxg4 77. Rb6 $11) 76... Rf1 77. Ke5 {Hoping for Rb7+.} (77. g4 $5 hxg4 78. Ke5 $11) 77... Re1+ 78. Kf4 {Black must now prevent Kg5.} Rf1+ $2 {[%mdl 8192]} (78... Rg1 $11) 79. Kg5 $18 Rf3 80. Rb7+ Kg8 81. g4 hxg4 82. Kg6 (82. f6 $18 Kf8 83. Kg6) 82... Kf8 83. f6 {Precision: White = 42%, Black = 68%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Cori, Jorge"]
[Black "Sevian, Samuel"]
[Result "1/2-1/2"]
[ECO "A20"]
[WhiteElo "2618"]
[BlackElo "2601"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,85,0,0,0,0,0,25,16,15,0,0,7,7,27,31,27,13,0,87,88,93,91,96,40,60,41,42,37,76,20,102,11,22,11,11,11,14,11,14,8,8,8,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 e5 2. g3 Nf6 3. Bg2 d5 4. cxd5 Nxd5 5. Nc3 Nb6 6. d3 Be7 7. Be3 O-O 8. Rc1 Re8 9. a3 Bf8 10. Nf3 Nc6 11. O-O Nd4 {A29: English Opening: Four Knights Variation with 4 g3} 12. Ne4 a5 {LiveBook: 6 Games} (12... c6 13. Bg5 f6 14. Nxd4 exd4 15. Bd2 Be6 16. Re1 Bd5 17. Qc2 Qd7 18. b4 Rad8 19. Qb2 {0-1 (73) Nepomniachtchi,I (2767)-Karjakin,S (2785) Doha 2016}) 13. Bg5 f6 14. Bd2 a4 15. Nxd4 exd4 16. Nc5 c6 17. Re1 Re5 $146 ({Predecessor:} 17... Kh8 18. b4 axb3 19. Qxb3 Bxc5 20. Rxc5 {½-½ (26) Meyers,M (2074)-Torres Kuckel,R (2191) Dortmund 2016}) 18. Bb4 Kh8 19. e3 dxe3 20. Rxe3 Qe8 (20... Bxc5 $11 {keeps the balance.} 21. Bxc5 (21. Rxc5 Rxe3 22. fxe3 Nd5 $14) 21... Rxe3 22. fxe3 Be6) 21. Rxe5 $16 Qxe5 22. d4 Qe8 23. Qc2 (23. Qe1 $16 Qf7 24. Qc3) 23... Qf7 $14 24. Re1 Nd5 25. Bd2 b5 26. h4 (26. Qe4 $16) 26... Bxc5 (26... Bg4 $11) 27. Qxc5 ({White should try} 27. Bxd5 $1 $16 cxd5 28. dxc5 (28. Qxc5 Be6 $16)) 27... Bd7 $11 {The position is equal.} 28. Bxd5 (28. Bb4 $5) 28... Qxd5 29. Qxd5 cxd5 {[%mdl 4096] Endgame KRB-KRB} 30. Re7 Bf5 31. h5 h6 32. f3 Rc8 33. g4 Rc2 34. Bb4 Bd3 35. Rd7 Be2 36. Bf8 Kg8 37. Bxg7 Bxf3 38. Bxf6 Rg2+ 39. Kf1 {[#] And now g5 would win.} Rxg4 40. Kf2 Rf4 41. Be5 Bg4+ 42. Bxf4 Bxd7 43. Bxh6 {Precision: White = 52%, Black = 73%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Delgado Ramirez, Neuris"]
[Black "Cuartas, Jaime Alexander"]
[Result "1-0"]
[ECO "B20"]
[WhiteElo "2613"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,81,-52,-57,-47,-30,-44,-62,-32,-35,0,0,7,39,39,-1,166,168,292,312,300,295,429,435,431,435,428,422,417,408,571,565,585,588,621,636,662,640,667,670,745,744,835,683,766,766,832,827,809,782,858,839,956,947,1062,1040,1987,1935,1805,2381,29987,1602,29988,29989,29989,29990]} 1. e4 c5 2. b3 d6 3. Bb2 Nc6 4. f4 Nf6 5. Nc3 g6 6. Bb5 {B20: Sicilian: Unusual White 2nd moves} Bd7 7. Bxc6 Bxc6 8. Qe2 Bg7 9. O-O-O O-O 10. Nf3 {[#] LiveBook: 3 Games} b5 $1 {[%mdl 512]} 11. e5 (11. Nxb5 Nxe4) 11... Nh5 12. g3 $146 ({Predecessor:} 12. Qe3 Bh6 13. Ne2 Qd7 {1-0 (27) Velickovic,S (2399)-Wojtkiewicz,A (2535) FIDE.com 2002}) 12... b4 (12... c4 $5) 13. Ne4 a5 14. d4 {[%cal Bd2d4,Bd4d5,Bd5c6][%mdl 32]} c4 {[#] White must now prevent ...c3.} 15. d5 c3 16. Bxc3 bxc3 $2 (16... Bd7 $11 {and Black stays safe.} 17. Bd4 Bg4) 17. dxc6 $18 a4 (17... Qb6 $142 18. Nxc3 (18. exd6 Qb4 $16) 18... Qxc6) 18. b4 ({Don't play} 18. Nxc3 $6 axb3 19. cxb3 Qb6 $18) 18... Qb6 19. b5 ({Less strong is} 19. Nxc3 Qxb4 20. Rd3 (20. Nd5 Qa3+ 21. Kd2 dxe5 $17) 20... Qa3+ 21. Kd2 Qc5 $14) 19... Rab8 (19... dxe5 {might work better.} 20. Nxe5 Bxe5) 20. Nxc3 Qc5 21. Rd3 Rfc8 22. Qe4 dxe5 23. Nxe5 Nf6 24. Qxa4 e6 25. Qc4 Qa3+ 26. Kd2 Qa5 27. Ke2 h5 28. Rb1 h4 29. Qb4 Qb6 30. Nc4 Qc7 31. Qd6 hxg3 32. Qxc7 Rxc7 33. hxg3 Ne8 34. Ne5 Bxe5 35. fxe5 Kf8 36. Rbd1 Ra7 37. Rd8 Rxd8 38. Rxd8 Ke7 39. Rxe8+ Kxe8 40. b6 {[%cal Bb5b6,Bb6b7][%mdl 32]} Ra6 41. b7 {Precision: White = 95%, Black = 26%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Pichot, Alan"]
[Black "Bachmann, Axel"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "2577"]
[BlackElo "2653"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,54,15,19,0,0,0,22,0,0,0,0,0,-6,0,-14,0,0,0,0,0,0,-151,-144,-261,-169,-204,-173,-170,-187,-260,-257,-333,-297,-379,-326,-422,-426,-635,-468,-1259,-1258]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 {[%cal Bf3d4,Bd4c2,Bc2e3][%mdl 32]} Qf6 5. Be3 Bc5 6. c3 Nge7 7. Bc4 O-O 8. O-O b6 9. Nc2 {C45: Scotch Game} Bb7 (9... Ne5 10. Be2 Bb7 11. f4 N5g6 12. e5 Qe6 13. b4 Bxe3+ 14. Nxe3 Nh4 15. Bg4 f5 16. Be2 Kh8 {0-1 (34) Kasparov,G (2812)-Caruana,F (2795) Saint Louis 2016}) 10. Nd2 Ne5 {[%cal Bc6e5,Be5g6,Bg6h4][%mdl 32]} 11. Be2 {The position is equal.} Bxe3 12. Nxe3 N5g6 13. Bf3 $146 {Black must now prevent e5!} ({Predecessor:} 13. Re1 d5 14. Qc2 Nf4 {½-½ (25) Markus,R (2221)-Janosi,E (2069) LSS email 2009}) 13... Nh4 14. Bg4 d5 15. g3 {e5 is the strong threat.} dxe4 16. gxh4 Rad8 $1 17. Qe2 Qxh4 18. Rfd1 $2 {[#]} (18. Rad1 $11 f5 19. Qc4+ Bd5 20. Qxc7 fxg4 21. Nxe4 $1 {[%mdl 512]}) 18... f5 $1 $17 {[%cal Bf7f5,Bf5g4][%mdl 32]} 19. Qc4+ (19. Nf3 $17 exf3 20. Bxf3 Qg5+ 21. Ng2 Bxf3 22. Qxf3) 19... Bd5 $1 $19 {[%cal Rd5c4]} 20. Qxc7 {aiming for Be2.} fxg4 21. Qg3 Qf6 22. Ndf1 (22. Nxg4 $142 Qe6 23. Ne3) 22... h5 {[%cal Bh7h5,Bh5h4][%mdl 32]} 23. Rd2 {intending Rad1.} Be6 24. Rad1 Rxd2 25. Rxd2 Ng6 {Black is clearly winning.} 26. Rd6 (26. Ng2 $142 Ne5 27. Kh1) 26... h4 27. Qg2 (27. Rxe6 $142 Qxe6 28. Qxg4) 27... Nf4 {Precision: White = 36%, Black = 88%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Peralta, Fernando"]
[Black "Barrientos, Sergio E"]
[Result "1/2-1/2"]
[ECO "E47"]
[WhiteElo "2569"]
[BlackElo "2463"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,99,29,25,42,37,36,38,45,39,50,38,52,60,72,52,80,80,80,72,84,83,89,87,83,83,85,80,75,56,72,56,58,58,86,88,83,83,89,85,82,66,54,54,57,64,60,56,52,58,58,44,56,44,60,47,58,47,56,59,22,0,0,0,0,0,0,-422,-404,-716,-686,-599,-317,-729,-658,-620,-495,-703,-708,-469,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 c5 6. Nf3 d6 7. O-O {LiveBook: 19 Games} h6 {E50: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3} (7... Re8 8. Ne2 Nbd7 9. e4 cxd4 10. a3 Ba5 11. b4 Bc7 12. Nexd4 Nf8 13. Nb5 e5 14. h3 Ne6 15. Nxc7 Qxc7 {1-0 (44) Bellaiche,A (2443)-Kogan,A (2524) France 2010}) 8. Bd2 Nc6 9. a3 $146 ({Predecessor:} 9. d5 Bxc3 10. dxc6 Bxd2 11. cxb7 Bxb7 12. Qxd2 Qb6 13. Qc2 Rfd8 14. Rac1 a5 15. Rfd1 a4 16. a3 {0-1 (60) Kremsner,A (2214)-Mochalov,E (2419) Fuegen 2006}) 9... Ba5 {White is slightly better.} 10. Qc2 Qe7 11. Rfe1 Re8 12. Rad1 b6 13. h3 Bxc3 14. Bxc3 ({Much weaker is} 14. bxc3 $6 e5 $15) 14... e5 15. d5 Nb8 {Threatens to win with ...e4.} 16. Nd2 {[%cal Bf3d2,Bd2f1,Bf1g3,Bg3h1,Bh1f2][%mdl 32]} Nbd7 17. f3 a6 18. b3 Rb8 19. Rb1 b5 20. Ba5 Nf8 21. Nf1 Bd7 22. Ng3 Rb7 23. Bc3 h5 24. f4 e4 25. Be2 h4 26. Nh1 Reb8 27. Nf2 Bf5 28. Kh2 Ng6 29. Bg4 Nxg4+ 30. hxg4 Bd7 31. Rbc1 ({Of course not} 31. Nxe4 bxc4 32. bxc4 Rxb1 $15) 31... f5 32. gxf5 Bxf5 33. Qe2 bxc4 34. bxc4 Rb3 35. Qh5 Rf8 36. g4 hxg3+ $1 37. Kxg3 {[#]} Ne5 $1 {[%mdl 512]} 38. fxe5 Rxc3 $1 39. e6 $2 {[%mdl 8192] [#]} (39. Ng4 $1 $11 Rxc1 40. Rxc1) 39... Qf6 $1 $19 40. Rxc3 (40. e7 $142 Qxe7 41. Nh3) 40... Bg6 41. Qe2 Qxc3 42. Ng4 $2 {[#]} (42. Rh1 Rf3+ 43. Kg2) 42... Rf3+ $1 43. Kh2 Bh5 44. Rg1 (44. e7 $142 Kf7 45. Rg1) 44... Bxg4 $1 45. Rxg4 Rxe3 $2 {[#]} ({Black should try} 45... Qe5+ $19 46. Kg1 Rh3) 46. Rxg7+ $1 $11 {[%mdl 512] The position is equal.} Kxg7 (46... Qxg7 47. Qxe3) 47. Qg4+ Kf6 48. Qf4+ Kg6 49. Qg4+ Kh6 {( -> ...Qd2+)} 50. Qh4+ {Precision: White = 68%, Black = 64%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Bacallao Alonso, Yusnel"]
[Black "Terry, Renato"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2554"]
[BlackElo "2454"]
[Annotator "TA"]
[PlyCount "131"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,131,5,3,14,0,0,0,0,0,0,0,5,-5,0,-55,0,-29,-25,-22,-16,-22,0,-12,0,-18,-18,-12,-11,-29,-29,-17,-4,0,0,-23,0,0,0,0,11,-16,0,-8,0,0,20,10,66,66,66,67,135,135,152,145,145,145,164,163,164,157,158,157,157,157,157,157,156,156,258,197,258,141,415,258,258,258,258,258,340,258,311,164,164,164,415,415,415,415,415,415,415,164,415,415,415,415,415,0,415,258,415,415,29976,29977,29979,29978,29978,29977,29976,29955,29986,29987]} 1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. b3 Bg4 5. Bb2 Nbd7 6. O-O e6 7. d3 Bd6 8. Nbd2 O-O 9. h3 Bxf3 10. Nxf3 Qe7 11. a3 e5 {A07: Réti Opening: New York and Capablanca Systems} (11... Rfd8 12. c4 Rac8 13. Qc2 a6 14. Rfe1 e5 15. e4 dxe4 16. dxe4 Nf8 17. c5 Bxc5 18. Bxe5 Ne6 19. Qb2 {0-1 (60) Adly,A (2684)-Vladimirov,Y (2589) Pavlodar 2015}) 12. Nh4 (12. e4 $5) 12... g6 13. e4 dxe4 {The position is equal.} 14. dxe4 Rad8 15. Qe2 Rfe8 16. b4 $146 ({Predecessor:} 16. a4 Nf8 17. Nf3 Nh5 18. Kh2 f6 19. Nd2 {1-0 (56) Ledger,A (2452)-Gordon,S (2338) Scarborough 2004}) 16... Nb6 (16... a5 $5) 17. Rad1 (17. Bc1 $11) 17... Qe6 (17... c5 $15) 18. Rd3 Nc4 19. Bc1 b5 20. Rfd1 Bc7 21. Nf3 a5 22. Nd2 (22. Rxd8 {keeps more tension.} Bxd8 23. Nd2 Nb6 24. Nb3 axb4 25. axb4 Be7 26. Bd2) 22... axb4 23. axb4 Rxd3 24. cxd3 (24. Qxd3 $5 {[%cal Rd2c4]} Rd8 25. Qf3 $11) 24... Nxd2 25. Bxd2 Ra8 26. Be3 Ra2 27. Qf3 Nd7 28. d4 $1 {[%cal Rd4d5]} exd4 29. Bxd4 Be5 (29... h5 {is more complex.} 30. Qe3 Ne5 31. Bc5 Nd7 32. Bd4) 30. Be3 Ra1 31. Kh2 Rxd1 32. Qxd1 Qd6 33. Qc2 {White wants to play f4.} Qxb4 (33... Bg7 $11) 34. Qxc6 $14 Nf8 35. Qd5 $1 {[%cal Rd5e5]} Qb2 ({Black should play} 35... Qc3 $14) 36. Bf1 $16 Ne6 37. Qxb5 ({And not} 37. Bxb5 Bd4 $11) 37... Qxb5 38. Bxb5 Bd4 39. Bxd4 Nxd4 $18 {[%mdl 4096] Endgame KB-KN} 40. Bc4 g5 41. Kg2 Kg7 42. f4 gxf4 43. gxf4 Nc6 44. Kf3 Ne7 (44... f6 $16 45. Bd5 Nb4) 45. Ke3 Ng6 (45... Kf8 {was necessary.} 46. h4 Kg7) 46. Bb3 (46. Bb5 $18) 46... Kf6 $2 {[%mdl 8192]} (46... f6 $16 {keeps fighting.} 47. Be6 Nh4) 47. Bd1 Kg7 48. Bh5 {[#] Bxg6 is the strong threat.} Ne7 49. Kd4 Kf6 50. Bg4 Kg7 51. Bd7 (51. f5 $142) 51... Ng6 52. Ke3 Ne7 $2 {[#]} (52... Nh4 {might work better.} 53. Bb5 Ng6) 53. f5 Kf6 54. Kf4 Ng8 55. Bc6 Kg7 56. Kg5 $2 (56. Ke5) 56... h6+ $2 (56... f6+ 57. Kf4 Ne7) 57. Kf4 Ne7 58. Bd7 Ng8 59. Bc6 Ne7 60. Bd5 Nc8 $2 (60... f6 {was called for.} 61. Bb7 Kf8) 61. Ke5 f6+ (61... Nb6 $18 62. Bb3 Kf8) 62. Ke6 {White mates.} Na7 63. Ke7 Nc8+ 64. Kd7 Nb6+ 65. Ke6 Na4 66. Ke7 {Precision: White = 54%, Black = 35%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Ramirez, Alejandro"]
[Black "Pulvett Marin, Daniel"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2552"]
[BlackElo "2437"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,91,34,31,36,19,18,23,26,24,44,34,41,37,35,25,32,21,15,7,34,33,35,28,33,37,46,39,66,56,40,27,87,82,101,67,161,173,162,117,311,304,335,223,411,411,440,453,440,415,562,556,609,629,717,729,696,638,763,755,803,780,787,758,748,787,790,769,782,758,723,723,854,795,843,825]} 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O c5 6. b3 d6 7. Bb2 {A30: Symmetrical English: Double Fianchetto and Hedgehog} Be7 (7... a6 8. d4 cxd4 9. Qxd4 Nbd7 10. Nc3 Be7 11. Rac1 O-O 12. Rfd1 Rc8 13. Qd2 Qc7 14. Ne1 Bxg2 15. Nxg2 Qb7 16. Qd3 Rfd8 17. Nf4 Ne5 18. Qd2 b5 19. cxb5 axb5 20. Nd3 {0-1 (70) Mamedov,R (2678)-Cordova,E (2637) Atlantic City 2016}) 8. e3 Nbd7 9. Qe2 O-O 10. Rd1 {LiveBook: 15 Games} Rc8 11. d3 {[%cal Bd2d3,Bd3d4][%mdl 32]} Qc7 12. Nc3 Qb8 $146 ({Predecessor:} 12... Rfd8 13. Rac1 Qb8 14. h3 Nf8 15. Qf1 Ng6 16. Nd2 d5 17. cxd5 exd5 {0-1 (47) Lehmitz,G-Goldberg,A (2365) Dresden 1993}) 13. Ne1 d5 14. cxd5 exd5 15. d4 Qa8 16. Rac1 Rfe8 17. Qd3 c4 18. Qb1 cxb3 19. axb3 Bc6 20. Nd3 Bd6 21. Qa2 a5 22. Ba3 Bxa3 23. Qxa3 b5 {[#] Threatens to win with ...b4.} 24. Qa2 Ne4 (24... b4 $11 25. Na4 Ne4) 25. Bh3 Ng5 26. Bg4 Nf6 (26... Rcd8 $14) 27. Bxc8 $18 Qxc8 28. Qe2 {Black must now prevent Ne5.} Nh3+ $2 (28... b4 $16 {might work better.}) 29. Kg2 Ng5 30. Nf4 Bd7 $2 {[#]} (30... Qb7 31. h4 Ne6 32. Nxe6 fxe6) 31. Ne4 $1 {[%mdl 512]} dxe4 32. Rxc8 Rxc8 33. Qb2 Bg4 34. Rc1 {White is clearly winning.} Bf3+ 35. Kg1 Rf8 36. Rc5 h6 37. h3 Bd1 38. Qb1 Bh5 39. Qc1 a4 40. bxa4 bxa4 41. Rc8 Rxc8 42. Qxc8+ Kh7 43. Qc2 a3 44. Qb3 Nf3+ 45. Kh1 Nd2 46. Qa2 {Precision: White = 70%, Black = 40%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Kaidanov, Gregory S"]
[Black "Umetsubo, Cesar Hidemitsu"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2550"]
[BlackElo "2381"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,59,15,10,0,0,0,0,17,10,57,56,0,43,47,41,39,22,29,16,242,230,204,221,235,191,172,173,177,170,153,126,352,340,350,346,343,333,325,319,367,357,730,255]} 1. Nf3 c5 2. c4 Nf6 3. Nc3 e6 4. e3 d5 5. d4 Nc6 6. cxd5 exd5 7. Bb5 cxd4 8. Nxd4 Bd7 9. O-O Bd6 {D32: Tarrasch Defence: Sidelines and lines without g3} 10. Be2 {LiveBook: 7 Games} O-O 11. Ndb5 Be5 {The position is equal.} (11... Bf5 12. Nxd6 Qxd6 13. Nb5 Qe5 14. Nd4 Nxd4 15. exd4 Qd6 16. Qb3 Rfe8 17. Be3 {½-½ (40) Jakovenko,D (2742)-Dominguez Perez,L (2729) Sochi 2015}) 12. Nxd5 Be6 $146 ({Predecessor:} 12... Nxd5 13. Qxd5 Be6 14. Qc5 Qa5 15. Qc2 Rfd8 16. Nc3 Nb4 17. Qb1 Rac8 18. a3 Nd5 19. Bd2 Nxc3 20. Bxc3 Bxc3 21. bxc3 Rxc3 22. Qxb7 {½-½ (22) Baumegger,S (2434)-Hoelzl,F (2353) Tweng 2007}) 13. Nf4 Qb8 14. Nxe6 Bxh2+ 15. Kh1 fxe6 16. f4 Bg3 17. Bc4 $36 {[%mdl 2048] Threatens to win with Qf3. Black is under pressure.} Qe8 $1 {aiming for ...Ne4.} 18. Nc7 Qg6 $2 (18... Qe7 $1 $11 {and Black is okay.} 19. Nxa8 Na5) 19. Bxe6+ $18 Kh8 {Hoping for ...Rad8.} 20. Nxa8 Rxa8 21. Bh3 Rd8 {[#]} 22. Qf3 $1 Ne4 {intending ...Nb4.} 23. f5 Qe8 24. f6 gxf6 $2 (24... Qg6 $16 {was worth a try.}) 25. Bf5 Ne5 26. Qxe4 Rd1 {[%cal Rd1f1]} 27. Bd2 $1 Rxd2 28. Qxb7 {[%csl Gf5][%cal Rb7h7]} Qh5+ 29. Bh3 Nd3 $2 (29... Qf7 30. Qxf7 Nxf7 31. Rxf6 Ng5 32. Rf8+ Kg7) 30. Qc8+ $2 {Precision: White = 88%, Black = 31%.} (30. Qe7 {[%cal Re7f8]} Qg6 {[#]} 31. Rac1 $1 {[%mdl 512]} Nxc1 32. Rxc1) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Morovic Fernandez, Ivan"]
[Black "Alzate, Dario"]
[Result "1-0"]
[ECO "C97"]
[WhiteElo "2537"]
[BlackElo "2362"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 30,75,62,0,27,27,37,37,37,39,105,99,88,89,102,100,223,227,291,285,281,284,287,276,412,370,623,621,650,649,650,652,640,635,625,623,706,704,725,716,670,680,1518,1280,2527,2337,29985,29986]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d6 9. h3 Na5 10. Bc2 c5 11. d4 Qc7 12. Nbd2 Bd7 13. Nf1 cxd4 14. cxd4 Rac8 15. Ne3 Nc6 16. Bb3 (16. d5 $1 $14 Nb4 17. Bb1) 16... Na5 {C99: Closed Ruy Lopez: Chigorin Defence: 11 d4 Qc7 12 Nbd2 cxd4} 17. Nd5 Nxd5 18. Bxd5 Bc6 {White is slightly better.} (18... exd4 19. b3 Nc6 20. Bb2 Bf6 21. Rc1 Qd8 22. Bxc6 Rxc6 23. Bxd4 Re8 24. Qd3 Bxd4 25. Qxd4 {1-0 (51) Bologan,V (2689)-Howell,D (2614) Kallithea 2009}) 19. b3 exd4 $146 (19... Bxd5 $14 20. exd5 f6) ({Predecessor:} 19... Bxd5 20. exd5 f6 21. Bd2 Nb7 22. Qe2 Qd7 23. a4 Rc2 24. axb5 axb5 {1-0 (55) Shyam,S (2424)-Thakur,A (2308) Mumbai 2009}) 20. Nxd4 $16 Bxd5 21. exd5 Bf6 22. Be3 Qb7 {[#]} (22... Nb7 $16) 23. Nf5 $1 $18 {[%cal Rf5d6]} Bxa1 24. Qxa1 {[%csl Gf5][%cal Ra1g7]} (24. Nxd6 Qc7 $11) 24... f6 {With the idea ...Qd7.} 25. Bd2 ({Not} 25. Nxd6 Qxd5 26. Rd1 (26. Nxc8 Rxc8 27. Rd1 Qe4 $14) 26... Qe5 $14) 25... b4 26. Qd4 (26. Nxd6 Qxd5 27. Nxc8 Qxd2 $16) 26... Rc7 (26... Qd7 $142) 27. Nxd6 Qa8 $2 (27... Qb8 28. Nf5 (28. Bxb4 Nc4 $18) 28... Rb7) 28. Bxb4 Rd7 29. Nf5 Nc6 30. Qg4 ({Stronger than} 30. dxc6 Rxd4 31. Nxd4 Rc8 $15) 30... Nxb4 31. Ne7+ ({Weaker is} 31. Qxb4 Qb8 $16) 31... Kh8 {[#] And now ...Qb7 would win.} 32. Qxd7 Rd8 33. Qe6 Nd3 34. Re4 {Intending Ng6+! and mate.} Ne5 35. f4 Nd7 {intending ...Nc5.} 36. Nc6 Nc5 37. Qe7 Nxe4 38. Nxd8 {Precision: White = 100%, Black = 18%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Vera Siguenas, Deivy"]
[Black "Prasca Sosa, Rafael Felipe"]
[Result "1-0"]
[ECO "B47"]
[WhiteElo "2526"]
[BlackElo "2400"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,69,14,16,63,58,74,73,68,64,63,63,79,73,69,73,79,58,75,75,76,81,77,76,89,49,87,74,107,95,111,64,73,74,77,86,87,82,118,104,108,66,155,151,140,141,152,-40,1055,989,29987,29988,29991,29992,29996,29997]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 {[%cal Bb1c3,Bc3a4,Ba4c5][%mdl 32]} Qc7 6. g3 a6 7. Bg2 Nf6 8. O-O Bc5 9. Nxc6 bxc6 {B47: Sicilian: Taimanov: 5 Nc3 Qc7 6 f4, 6 g3 and 6 Be2} (9... dxc6 10. Na4 Ba7 11. c4 e5 12. c5 Be6 13. Qc2 Rd8 14. Be3 Ng4 15. Bg5 Rd4 16. b3 f6 17. Bc1 h5 18. h3 {½-½ (71) Demchenko,A (2639)-Vitiugov,N (2734) Ekaterinburg 2013}) 10. Na4 Ba7 11. c4 d6 {White is better.} 12. c5 dxc5 13. Be3 O-O 14. Bxc5 Bxc5 15. Nxc5 e5 $146 ({Predecessor:} 15... Nd7 16. Rc1 Rb8 17. b3 {0-1 (39) Enders,P (2443)-Zwanzger,J (2353) Germany 2006}) 16. Rc1 Rd8 17. Qc2 Bg4 18. h3 Bh5 19. Qc3 a5 20. Rfe1 {[%cal Bf1e1,Be1e3,Be3d3,Bd3d6,Bd6d7][%mdl 32]} Re8 21. Re3 Bg6 22. Rd3 h5 23. Rcd1 h4 24. g4 Qb6 25. a3 a4 26. Rd6 Qb5 27. Bf1 Qb8 28. Bc4 {And now Qf3 would win.} Nxe4 (28... Kh7 $1 $14) 29. Nxe4 $16 Bxe4 30. Rd7 $36 {[%mdl 2048] Black is under strong pressure.} Bg6 {[#]} 31. R1d6 $2 (31. Qe3 $1 $16 {[%cal Re3g5]} e4 32. R7d6) 31... Kh7 $2 {[%mdl 8192]} (31... Ra7 $15) 32. Qd2 $18 {White wants to mate with Rxg6!} Ra7 {[#]} 33. Rxg6 $1 {[%mdl 512] White mates.} Rxd7 {[#]} (33... fxg6 34. Qg5) 34. Qg5 $1 {[%mdl 512]} Rd6 35. Bxf7 {Precision: White = 72%, Black = 21%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Hungaski, Robert Andrew"]
[Black "Ynojosa Aponte, Felix Jose"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2492"]
[BlackElo "2395"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,77,22,18,33,38,29,18,14,10,34,27,22,26,28,25,50,41,46,33,57,44,52,37,65,61,62,66,70,62,84,79,111,70,93,66,79,73,62,75,64,28,76,56,210,184,215,171,239,212,335,341,322,237,403,390,375,393,389,393,29986,29987,29988,29989,29988,1505,29990,29991,29994,29995]} 1. Nf3 c5 2. c4 Nc6 3. Nc3 e5 4. g3 Nf6 5. Bg2 Be7 (5... d6 6. O-O Be7 7. e3 O-O 8. d4 cxd4 9. exd4 Bg4 10. Ne2 e4 11. Nd2 Nxd4 12. f3 exf3 13. Nxf3 Nxf3+ 14. Bxf3 Bxf3 15. Rxf3 Rc8 {0-1 (33) Ruck,R (2561)-Saric,I (2652) Tallinn 2016}) 6. d3 {LiveBook: 4 Games. A34: Symmetrical English: 2 Nc3, lines with ...d5} h6 7. Nd2 d6 8. a3 {White has an edge.} O-O 9. Rb1 a5 10. O-O Bg4 11. h3 $146 ({Predecessor:} 11. b3 Qd7 12. Nde4 Rab8 13. Nxf6+ Bxf6 14. Qd2 h5 15. f3 Be6 16. Qe1 {½-½ (47) Tseng,W (2399)-Pecka,J (2398) ICCF email 2013}) 11... Bh5 12. Qa4 Qc8 13. e3 Nd7 14. Nd5 $36 {[%mdl 2048] White has some pressure.} Bd8 {Black wants to play ...Be2.} 15. Qc2 f5 16. f4 Nf6 17. b3 Bf7 18. Bb2 Rb8 19. Kh2 Be6 20. Rbe1 b5 21. Ba1 Kh8 22. Qd1 a4 23. bxa4 bxc4 24. dxc4 e4 25. Nc3 (25. g4 $5) 25... Qa6 26. Nb5 Ra8 $2 {[#]} (26... Na5 $14) 27. g4 $1 $18 {[%cal Rg4f5] gxf5 is the strong threat.} (27. Nxd6 Na5 $14) 27... fxg4 28. Nxe4 ({Stronger than} 28. Nxd6 gxh3 29. Bxh3 Bxh3 $14) 28... Bxc4 (28... gxh3 $142 29. Bf3 (29. Qxd6 hxg2 30. Rg1 Bg8 $17) 29... Bxc4) 29. Rg1 {Hoping for Nxf6.} g3+ (29... gxh3 {was necessary.} 30. Bxh3 Qxa4) 30. Nxg3 d5 31. Nd6 Ne7 $2 (31... Ra7 32. Nxc4 Qxc4) 32. Nxc4 Qxc4 33. Nh5 Qxa4 {[#]} 34. Nxg7 $1 {[%mdl 512]} Kxg7 $2 (34... Qxd1 $18 35. Rxd1 Kh7) 35. Bxd5+ Kh7 36. Qd3+ Kh8 37. Bxa8 (37. Rg6 $142 Qd4 38. exd4 Neg8 39. dxc5 Rxa3 40. Qxa3 Kh7 {[#]} 41. Rg7+ $3 {[%mdl 512]} Kh8 42. Qg3 Ng4+ 43. Rxg4+ Nf6 44. Rg8+ Rxg8 45. Qxg8#) 37... Qxa8 38. Qd6 Qc6 39. Bxf6+ {Precision: White = 84%, Black = 39%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Tang, Andrew"]
[Black "Valenzuela Gomez, Fernando"]
[Result "1-0"]
[ECO "E83"]
[WhiteElo "2461"]
[BlackElo "2377"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,99,43,42,58,16,33,22,32,32,26,0,0,-8,76,74,78,68,55,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,39,22,41,48,29,42,25,48,27,41,68,0,8,8,35,46,32,23,65,51,152,145,152,152,154,152,197,199,193,158,158,158,158,167,160,160,29982,29983,29983,29984,29984,29981,29981,29982,29982,29983,29979,29978,29975,583]} 1. d4 Nf6 2. c4 g6 3. f3 Bg7 4. e4 d6 5. Nc3 O-O 6. Nge2 Nc6 7. Be3 a6 8. Rb1 Bd7 {E83: King's Indian: Sämisch Panno (6...Nc6): Lines without either Nge2 or Qd2} 9. Qd2 {LiveBook: 4 Games} e6 $146 ({Predecessor:} 9... b5 10. cxb5 axb5 11. b4 Qb8 12. d5 Ne5 13. Nd4 c6 14. dxc6 Nxc6 15. Ndxb5 Rc8 16. Be2 Ne5 {0-1 (56) Sethuraman,S (2640)-Guseinov,G (2634) Berlin 2015}) 10. g4 h5 {The position is equal.} 11. g5 Nh7 12. h4 f6 13. Bg2 fxg5 14. hxg5 b5 (14... e5 $11) 15. cxb5 $16 axb5 16. Nxb5 e5 17. dxe5 ({Better is} 17. d5 $1 $14 Na5 18. Na3) 17... Nxe5 $11 18. f4 $1 {[%cal Rf4e5]} Bxb5 19. Qd5+ Kh8 20. Qxb5 Rb8 21. Qd5 c6 $1 {[%cal Rc6d5]} 22. Qd1 Qa5+ 23. b4 Rxb4 24. O-O Ng4 25. Rxb4 Nxe3 26. Qa4 $1 {[%cal Ra4a5]} Qc5 {[#] White must now prevent ...Nc2+.} 27. Rc1 Nc2+ $1 28. Kh1 Qxb4 29. Qxc2 Qb6 30. Rf1 $36 {[%mdl 2048] And now e5 would win. White is more active.} ({Inferior is} 30. Qxc6 Qf2 $17) 30... Nxg5 31. Qd3 (31. e5 $14 Qe3 32. fxg5 Rxf1+ 33. Bxf1) 31... Nf7 32. e5 Nxe5 33. fxe5 {aiming for Rxf8+.} Rxf1+ 34. Bxf1 {Nf4 is the strong threat.} Qf2 35. Ng1 $1 {[%cal Rg1h3] Strongly threatening Nh3.} dxe5 (35... Bxe5 $14 36. Nf3 Kg7) 36. Bg2 $16 Qxa2 37. Qxg6 Qf2 38. Nf3 ({Don't do} 38. Qxc6 Qh4+ 39. Nh3 Bf6) (38. Qxh5+ Kg8 $18) 38... Kg8 39. Qe6+ (39. Qxh5 Qe3 $18) 39... Kf8 40. Qf5+ ({Don't play} 40. Qxc6 Qg3 $18) 40... Ke7 41. Bh3 {White threatens Qe6+ and mate.} Qe3 42. Qd7+ Kf8 43. Qd6+ Kg8 $2 {[#]} (43... Kf7 $16) 44. Be6+ {White mates.} Kh7 45. Bf5+ Kg8 46. Qe6+ Kf8 47. Qc8+ Kf7 48. Qd7+ Kf8 49. Qd8+ Kf7 50. Ng5+ {Precision: White = 75%, Black = 56%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Valderrama Quiceno, Esteban Alb"]
[Black "Garcia Pantoja, Roberto"]
[Result "1/2-1/2"]
[ECO "A06"]
[WhiteElo "2413"]
[BlackElo "2500"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,88,22,27,33,17,0,12,-6,14,-10,-3,-23,-7,-10,6,5,13,-17,5,5,5,5,5,0,20,11,7,10,25,0,0,0,0,1,12,2,2,0,0,0,15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O Be7 5. c4 O-O 6. d4 dxc4 7. Ne5 Qd6 8. Nxc4 {E05: Open Catalan: 5 Nf3 Be7} (8. Na3 Nbd7 9. Naxc4 Qa6 10. b3 Nd5 11. Bb2 Rd8 12. Qc2 Nb4 13. Qe4 Rb8 14. a3 Nd5 15. Qc2 N5b6 {1-0 (36) Khismatullin,D (2609)-Alekseenko,K (2570) Sochi 2016}) 8... Qa6 9. Qb3 Nc6 10. e3 b5 11. Nca3 Rb8 12. Bd2 $146 ({Predecessor:} 12. Qc2 Bb7 13. Bd2 Rfc8 14. Rc1 Nd8 15. Bf1 Ba8 {0-1 (30) Zwaneveld,A (1838)-Dibley,E (2026) IECG email 2002}) 12... Bd7 13. Rc1 Rfc8 14. Qd3 Qb6 15. Be1 Nb4 16. Bxb4 Bxb4 17. Nc2 Bd6 18. b4 e5 19. Nd2 exd4 20. exd4 Bc6 21. Bxc6 Qxc6 {The position is equal.} 22. a3 Re8 23. Ne3 Qd7 24. Kg2 g6 25. Qc2 Ra8 26. Nb3 Ng4 27. Re1 Nxe3+ 28. fxe3 f5 29. Na5 a6 30. Rac1 Re4 31. Qc6 Qxc6 32. Rxc6 Rae8 33. Nb7 Rxe3 34. Rxe3 Rxe3 35. Nxd6 cxd6 36. Rxa6 $11 {[%mdl 4096] Endgame KR-KR} Kf7 37. Rxd6 Rxa3 38. Rb6 Rd3 39. Rxb5 Rd2+ 40. Kg1 Kf6 41. Rb7 h5 42. Rb6+ Kf7 43. Rb7+ Ke6 44. Rb6+ Kf7 {Precision: White = 75%, Black = 74%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Valdes Romero, Leonardo"]
[Black "Ortiz Suarez, Isan Reynaldo"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2407"]
[BlackElo "2570"]
[Annotator "TA"]
[PlyCount "41"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,20,25,38,31,30]} 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O c5 5. c4 g6 6. Nc3 Bg7 7. d4 cxd4 8. Qxd4 O-O 9. Qh4 d6 10. Rd1 {A30: Symmetrical English: Double Fianchetto and Hedgehog} (10. Bh6 Nbd7 11. Rfd1 Rc8 12. b3 Rc5 13. Ng5 Bxg2 14. Kxg2 Re8 15. Bxg7 Kxg7 16. Nge4 Qa8 {½-½ (16) So,W (2674)-Svidler,P (2734) Amsterdam 2010}) 10... Nbd7 {Predecessor:} 11. Bh6 $146 Re8 12. Bxg7 Kxg7 13. Rac1 Rc8 14. b3 Rc5 15. Qd4 Qa8 16. h3 Rec8 17. Qe3 Ne5 18. Ne1 Bxg2 19. Nxg2 Qb7 20. Nf4 a6 21. a4 {0-1 (34) Haria,R (2382)-Hjartarson,J (2540) chess.com INT 2017} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Fernandez Reyes, Lisandro"]
[Black "Arenas, David"]
[Result "1/2-1/2"]
[ECO "A42"]
[WhiteElo "2402"]
[BlackElo "2488"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,91,45,50,51,55,66,35,41,32,34,24,20,21,54,54,54,52,53,43,43,47,54,33,35,17,47,8,52,47,93,68,95,95,89,89,83,86,99,9,9,9,13,16,49,0,16,16,16,16,18,5,9,12,57,67,59,0,0,0,0,0,0,0,0,0,0,0,0,-8,0,-8,0,-8,0,0,0,-8,-8,-12,0,-533,0,-119]} 1. d4 g6 2. c4 Bg7 3. Nc3 d6 4. e4 e5 5. d5 Nd7 6. Bd3 Nc5 {A42: Modern Defence: Averbakh Variation} 7. Bc2 a5 8. h3 Ne7 {White is slightly better.} 9. Be3 $146 ({Predecessor:} 9. Nge2 f5 10. exf5 Nxf5 11. O-O O-O 12. Ne4 Nxe4 13. Bxe4 Qh4 14. Qd3 {½-½ (44) Parkhov,Y (2162)-Kobo,O (2497) Kiryat Ono 2016}) 9... b6 10. Nf3 O-O 11. g4 f5 12. gxf5 gxf5 13. Rg1 f4 14. Bxc5 $1 bxc5 15. Ba4 Rf6 16. h4 Rg6 17. Kd2 Rb8 18. b3 (18. h5 $5 {[%cal Rh5g6]} Rh6 19. Kc2 $15) 18... Bf6 19. Ng5 (19. h5 $5 {[%cal Rh5g6]} Rxg1 20. Qxg1+ Kh8 21. Qh1 $14) 19... Bxg5 20. hxg5 Rg7 21. Qh5 Ng6 22. f3 Bd7 23. Bxd7 Qxd7 24. Qg4 (24. Rh1 $16) 24... Qxg4 $11 25. Rxg4 Kf7 26. Nb5 Ke8 27. a3 Ra8 28. Kc3 Kd7 29. Rh1 Rag8 30. b4 axb4+ 31. axb4 Nh8 32. bxc5 dxc5 33. Rgh4 ({White should try} 33. Na7 $14) 33... Nf7 34. Ra1 Nxg5 35. Ra7 Rc8 36. Rh6 Rg6 37. Rxg6 hxg6 {[%mdl 4096] Endgame KRN-KRN} 38. Ra6 Nxf3 {Hoping for ...g5.} 39. Rxg6 {[#] Black must now prevent Rg7+.} Re8 40. Rc6 Rc8 41. Rg6 {And now Rg7+ would win.} Re8 42. Rc6 Rc8 43. Rxc5 Ng5 44. Kd3 Nf7 (44... f3 $5 45. Rc6 $8 Rf8 46. Rxc7+ Kd8 $11) 45. Kc3 $2 {[%mdl 8192] [#]} (45. Rc6 $11) 45... Ng5 $2 (45... f3 $1 $19 {[%cal Rf3f2]} 46. Rc6 Nd6 47. Nxd6 f2 48. Nxc8 f1=Q) 46. Rc6 {Precision: White = 55%, Black = 58%.} (46. Kd3 $11 {was the only way to keep the balance.}) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Garcia, Gildardo"]
[Black "Vasquez Schroeder, Rodrigo"]
[Result "0-1"]
[ECO "B96"]
[WhiteElo "2396"]
[BlackElo "2553"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,56,26,29,-37,-5,-24,-35,-25,-34,-79,-67,-65,0,0,0,-14,0,-8,0,0,0,0,0,-212,-229,-251,-218,-256,-166,-211,-209,-723,-714,-689,-726]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Nbd7 8. Qf3 Qc7 9. O-O-O b5 10. Bd3 Bb7 11. Rhe1 Qb6 12. Bxf6 Nxf6 {LiveBook: 8 Games} 13. g4 {B96: Sicilian Najdorf: 6 Bg5 e6 7 f4, lines other than 7...Qb6 and 7...Be7} ({White should try} 13. f5 $11) (13. f5 b4 14. Nce2 e5 15. Nb3 h5 16. Kb1 Be7 17. Nd2 Rc8 18. Nc4 Rxc4 19. Bxc4 Bxe4 20. Qb3 O-O {½-½ (39) Jakovenko,D (2735)-Gelfand,B (2731) Ashdod 2015}) 13... O-O-O {[#]} (13... Nd7 $5 {[%cal Rb6d4]} 14. Nce2 g6 $15) 14. g5 $146 {[%cal Rd3b5]} ({Predecessor:} 14. Nb3 d5 15. g5 dxe4 16. Bxe4 Rxd1+ 17. Rxd1 Nxe4 18. Nxe4 Bd5 19. Qd3 Qc7 20. Qe3 Be7 {0-1 (45) Li,S (2552)-Xiu,D (2289) Shandong 2007}) 14... Qxd4 15. gxf6 {Black is slightly better.} Qxf6 16. a4 {[#]} b4 $1 {[%cal Rb4c3]} 17. Ne2 g6 (17... g5 $15 18. Bxa6 Bxa6) 18. Qe3 $11 {And now Qa7 would win.} Bg7 19. c3 bxc3 20. bxc3 {aiming for Qa7.} Rd7 $36 {[%mdl 2048] Black has some pressure.} 21. Qa7 {[#]} Bxe4 $1 {[%mdl 512]} 22. Bxa6+ (22. Bxe4 Rxa7) 22... Kd8 23. Qb6+ $2 (23. Qe3 $1 $11 {and White has nothing to worry.} Bd5 24. a5) 23... Ke7 $19 24. Rd4 Qf5 25. Rc4 Ra8 26. Bc8 Qd5 27. Qb5 $2 (27. Rc7 Rxc8 28. Rxc8) 27... Rda7 {Hoping for ...Qxb5.} 28. Ba6 Qd3 {Precision: White = 29%, Black = 53%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "11"]
[White "Mendoza, Rafael"]
[Black "Shabalov, Alexander"]
[Result "1/2-1/2"]
[ECO "B70"]
[WhiteElo "2293"]
[BlackElo "2556"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,86,6,8,4,8,8,4,26,4,9,8,12,0,20,16,14,24,18,4,4,4,8,8,16,10,18,22,15,13,9,13,9,8,10,10,17,0,14,0,60,60,54,16,16,16,16,16,18,7,21,2,12,9,38,17,39,12,12,13,15,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. g3 Nc6 7. Bg2 Nxd4 8. Qxd4 Bg7 9. h3 O-O 10. Qd1 Be6 11. O-O Rc8 {B70: Sicilian Dragon: 6 g3 and 6 Be2 (without a later Be3)} 12. Nd5 {LiveBook: 3 Games} b5 13. c3 {[#]} a5 $146 ({Predecessor:} 13... Nxd5 14. exd5 {½-½ (14) Sax,G (2506)-Balogh,C (2624) Nyiregyhaza 2008}) 14. Re1 Nd7 15. Qe2 Rb8 16. Bg5 Re8 17. Rad1 b4 18. cxb4 axb4 19. b3 Kf8 20. Rc1 Qa5 21. Be3 Bxd5 22. exd5 Bc3 23. Red1 Nf6 24. Rc2 Rbc8 25. Qd3 Rc7 26. Rdc1 Rec8 27. Kh2 Nd7 28. Qe2 Nf6 29. Qd3 h5 30. Kg1 Be5 (30... Ra8 $11) 31. Rxc7 $14 Rxc7 32. Rxc7 (32. Rc6 {keeps more tension.} Rb7 33. Rc8+ Kg7 34. Qc4 Qb5 35. Qc6) 32... Qxc7 33. Qc4 Qxc4 34. bxc4 $11 {[%mdl 4096] Endgame KBB-KBN} Nd7 35. Kf1 Bc3 36. f4 Ke8 37. Ke2 Kd8 38. Bf3 Kc7 39. g4 hxg4 {The position is equal.} 40. hxg4 Nc5 41. Bxc5 dxc5 42. Kd3 Bb2 43. Ke4 Kd6 {Precision: White = 55%, Black = 48%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "12"]
[White "Fier, Alexandr"]
[Black "Ramirez, Alejandro"]
[Result "1-0"]
[ECO "B48"]
[WhiteElo "2576"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,72,17,24,23,20,11,27,0,0,0,0,0,27,0,0,-12,-12,-8,50,0,36,40,31,35,57,0,0,0,0,-11,-2,-26,-6,-15,8,-17,-14,-25,-18,-25,0,0,0,0,0,0,0,0,24,20,701,689,687,698,620,611,29976,29976,29999]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qf3 {B48: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 without Be2} d6 8. O-O-O Bd7 {LiveBook: 22 Games} 9. Nxc6 $146 {White has an edge.} ({Predecessor:} 9. Qg3 Nf6 10. f3 Rc8 11. Nxc6 Bxc6 12. Bd3 b5 13. Kb1 Nd7 14. Rhe1 Nc5 {1-0 (42) Lopez Martinez,J (2552)-Ivanisevic,I (2648) Sitges 2016}) 9... Bxc6 10. Bd3 Nf6 11. Qg3 b5 12. f3 g6 13. h4 Bg7 14. Kb1 (14. Be2 $5 {[%cal Rg3d6]}) 14... Rc8 (14... b4 $5 15. Ne2 $8 h5 $14) 15. Qf2 h5 16. Bd4 (16. Bb6 $5 {[%cal Rb6c7]} Qb7 17. a3 $11) 16... e5 (16... Qb7 $11) 17. Be3 Qb7 (17... b4 $5 {[%cal Rb4c3]} 18. Ne2 Bd7 $14) 18. Bg5 b4 19. Ne2 a5 20. Bxf6 ({White should try} 20. Bc4 $14) 20... Bxf6 $11 21. Bc4 Be7 22. Bd5 a4 23. Nc1 Bxd5 24. Rxd5 Rc6 25. g4 hxg4 26. fxg4 Qc8 27. g5 Bxg5 28. Rf1 $1 Bf4 29. Nd3 {[#]} b3 $1 {[%mdl 512]} 30. cxb3 (30. axb3 axb3) 30... axb3 31. axb3 Qg4 32. Nxf4 Qxf4 $4 {[%mdl 8192] [#]} (32... exf4 $11 33. Qxf4 Qxf4 34. Rxf4 Ke7) 33. Qe2 $1 $18 ({Not} 33. Qxf4 exf4 34. Rxf4 Ke7 $14) 33... Qxh4 {White must now prevent ...Qh2.} 34. Qb5 Qxe4+ 35. Ka2 Kd7 36. Qb7+ Ke6 37. Qxf7# {Precision: White = 52%, Black = 34%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "12"]
[White "Hungaski, Robert Andrew"]
[Black "Iturrizaga Bonelli, Eduardo"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2492"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "133"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,133,54,53,27,37,33,30,29,41,56,48,46,43,31,43,43,43,43,43,41,43,43,43,43,41,17,42,34,50,47,50,34,50,50,50,34,35,6,22,22,22,22,22,22,22,22,22,22,29,10,31,0,31,0,43,0,22,0,0,0,0,0,0,0,29,22,24,22,22,22,101,22,22,0,83,0,41,0,189,4,25,0,189,0,14,0,20,0,20,0,0,0,20,0,0,0,0,0,0,0,0,0,974,954]} 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Nc6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 O-O 8. Be2 d6 9. Qd2 Bd7 10. O-O Nxd4 11. Bxd4 Bc6 12. f3 a5 13. b3 Nd7 14. Be3 Nc5 15. Rac1 Be5 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0} 16. Rfd1 e6 {LiveBook: 10 Games} 17. Bd4 (17. Rc2 Qe7 18. Nb5 Qh4 19. g3 Bxg3 20. hxg3 Qxg3+ 21. Kf1 Nxe4 22. Qd3 f5 23. Nd4 f4 24. Nxc6 fxe3 25. Qxe3 Rf4 26. Nd4 Rh4 27. Qg1 Rh1 {0-1 (27) Lupulescu,C (2618)-Iturrizaga Bonelli,E (2650) Baku 2016}) 17... Qb6 {[#] White has an edge.} 18. Nb5 $146 ({Predecessor:} 18. Bxe5 Nd3+ {0-1 (18) Yu,R (2526)-Liu,Q (2502) China 2017}) 18... Bxd4+ 19. Qxd4 e5 20. Qe3 Bxb5 21. cxb5 Rfd8 22. Bc4 Rac8 23. Kh1 Qc7 24. Bd5 Qd7 25. a4 Qe7 26. Qd2 b6 27. Qe3 Kg7 28. Rc4 Rf8 29. Rc2 f5 30. exf5 Rxf5 31. Rcd2 Rcf8 32. Kg1 Rf4 33. Bc4 R8f6 34. Rd4 Qc7 35. Rxf4 Rxf4 36. g3 Rf6 37. Bd5 Qd7 38. Kg2 Qf5 39. Rc1 Rf8 40. Qd2 Rc8 41. Qe3 Rf8 42. Qd2 Qf6 43. Qe3 g5 44. Rd1 h6 45. Bc4 Qg6 46. Qd2 Qf5 47. Rf1 Rf6 48. Qd5 {[%csl Gc4][%cal Rd5g8]} Qc8 49. Qc6 Qd8 50. Rd1 Qe7 (50... Qb8 $1 $11) 51. Bd5 (51. Kg1 $1 $16) 51... Qd8 $11 52. Bc4 ({White should try} 52. Rb1 $11) 52... Qe7 $16 53. Bd5 Qd8 54. Bc4 h5 $2 {[#]} (54... Qe7 $11 {and Black is okay.}) 55. Qd5 $2 ({White must play} 55. b4 $1 $18 {[%cal Rb4c5][%mdl 512]} axb4 56. a5 $1 {[%mdl 512]}) 55... Qc8 56. Qc6 $2 (56. Kg1 $11) 56... Qd8 $18 {[#]} 57. Qd5 $2 (57. b4 $1 $18 {[%cal Rb4c5][%mdl 512]} axb4 {[#]} 58. a5 $1 {[%mdl 512]}) 57... Qe8 58. Qc6 Qe7 59. Qd5 Kh6 60. Qg8 Rf8 61. Qd5 Rf6 62. Qd2 $40 {[%mdl 128] White has some attack.} e4 63. fxe4 Qxe4+ ({Reject} 63... Nxe4 $6 64. Qd4 $16) 64. Kg1 h4 65. Re1 (65. Bd5 $5 {[%cal Rd5e4]} Qg4 66. Qd4 Qxd4+ 67. Rxd4 $11) 65... Qg4 66. Qc3 Qf5 $2 {[%mdl 8192]} (66... Kg7 $11) 67. Rf1 {Precision: White = 36%, Black = 54%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "13"]
[White "Iturrizaga Bonelli, Eduardo"]
[Black "Ramirez, Alejandro"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2663"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,45,24,32,84,87,81,88,92,84,87,80,129,123,135,133,183,173,185,162,661,652]} 1. c4 c5 2. Nf3 b6 3. g3 Bb7 4. Bg2 Nf6 5. O-O g6 6. d4 cxd4 7. Qxd4 Bg7 8. Nc3 d6 9. Rd1 Nbd7 10. Be3 Rc8 11. Rac1 a6 {A30: Symmetrical English: Double Fianchetto and Hedgehog} 12. b3 O-O 13. Qh4 Rc7 14. g4 {[%cal Bg3g4,Bg4g5][%mdl 32] LiveBook: 34 Games} Qb8 {[#]} (14... h6 $14) 15. g5 $1 $16 {[%cal Rg5f6]} Ne8 16. Nd5 Bxd5 17. cxd5 a5 $146 ({Predecessor:} 17... Qb7 18. Qe4 Rxc1 19. Rxc1 {1-0 (35) Bacrot,E (2712)-Carow,J (2410) Deizisau 2015}) 18. Nd4 {[%cal Bf3d4,Bd4c6,Bc6e5][%mdl 32]} Nc5 19. Nc6 $36 {[%mdl 2048] White is in control.} Qb7 20. Qc4 f6 21. h4 {[%cal Bh2h4,Bh4g5][%mdl 32]} fxg5 22. hxg5 Be5 $2 {[#]} (22... Bb2) 23. Nxe5 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "13"]
[White "Vera Siguenas, Deivy"]
[Black "Fier, Alexandr"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2526"]
[BlackElo "2576"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,65,24,29,37,35,-1,-8,0,0,-29,-29,-28,-28,-28,-28,-26,-20,-14,-24,-30,-13,-8,-10,-41,-20,-17,-18,-41,-24,-23,0,0,0,0,0,0,0,0,0,0,9,9]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Nf6 6. Ndb5 d6 7. Bf4 e5 8. Bg5 a6 9. Na3 b5 10. Nd5 Be7 11. Bxf6 Bxf6 12. c3 Bg5 13. Nc2 Ne7 14. a4 {B33: Sicilian: Pelikan and Sveshnikov Variations} (14. Ncb4 O-O 15. h4 Bh6 16. Bd3 Nxd5 17. Nxd5 Be6 18. Bc2 Rb8 19. Qd3 a5 20. a3 Kh8 21. Rd1 Bg4 22. f3 {½-½ (32) Bologan,V (2640)-Zhigalko,S (2639) Poikovsky 2017}) 14... bxa4 15. Rxa4 Nxd5 16. Qxd5 Be6 17. Qd3 O-O 18. Be2 a5 19. O-O Qb6 20. b4 axb4 21. Rxa8 Rxa8 22. Nxb4 Qc5 $146 23. Na6 Qc6 24. Rd1 (24. Nb4 $5 {[%cal Rb4c6]} Qc5 25. Rb1 $11) 24... g6 25. Nb4 Qc5 26. Na6 Qa5 27. Nb4 Rc8 28. Qxd6 {The position is equal.} Rd8 29. Qa6 Rxd1+ 30. Bxd1 Qxa6 31. Nxa6 Bd2 32. Nc7 Bxc3 33. Nxe6 {Precision: White = 67%, Black = 64%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "13"]
[White "Hungaski, Robert Andrew"]
[Black "Kaidanov, Gregory S"]
[Result "0-1"]
[ECO "D43"]
[WhiteElo "2492"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,63,51,51,40,51,0,11,0,0,0,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-430,-426,-390,-383,-347,-367,-733,-736,-695,-643,-694,-654,-968,-940,-881,-855,-1355,-1283,-29985,-29986,-29986]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 c6 5. g3 Nbd7 6. Bg2 dxc4 7. O-O b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 8. e4 {[%cal Be2e4,Be4e5][%mdl 32] E01: Catalan: Early deviations} Be7 (8... Bb7 9. e5 Nd5 10. Ng5 h6 11. Nxe6 fxe6 12. Qh5+ Ke7 13. Ne4 Qe8 14. Bg5+ hxg5 15. Qxh8 Kd8 16. Nxg5 Kc8 {0-1 (39) Ipatov,A (2660)-Fedoseev,V (2658) Saint Louis 2017}) 9. d5 b4 10. dxe6 fxe6 {LiveBook: 4 Games} 11. e5 Nd5 12. Ne4 O-O 13. Qc2 {aiming for Neg5.} Nc5 $146 ({Predecessor:} 13... Rxf3 14. Bxf3 Nxe5 15. Bg2 Ba6 {1-0 (35) Kohlweyer,B (2422)-Aryan,C (2246) Badalona 2014}) 14. Nxc5 Bxc5 15. Ng5 {[%csl Gg5][%cal Rc2h7]} Rf5 $1 16. Qxc4 Qb6 $1 $36 {[%mdl 2048] White is under pressure.} 17. Qh4 Bxf2+ 18. Kh1 h6 19. Ne4 Ba6 {[#]} 20. Bxh6 $1 {[%mdl 512] Black must now prevent Qg4!} Bxf1 (20... gxh6 21. Qxh6) 21. Rxf1 {And now Bxg7! would win.} Be3 {[#]} (21... gxh6 22. Qxh6 Qc7 23. Qxe6+ Qf7 24. Qxc6 $16) 22. Rxf5 $4 {[%mdl 8192]} (22. Bxg7 $1 $11 {[%mdl 512]} Rxf1+ (22... Kxg7 23. Qg4+) 23. Bxf1 Kxg7 24. Ng5 Bxg5 25. Qxg5+ Kf8 26. Qh6+ Kg8 27. Bh3) 22... exf5 $19 23. Bxg7 Kxg7 24. Nd6 Rf8 25. Bxd5 $2 (25. Qh5 Ne7 26. Qh4) 25... cxd5 26. Qe7+ Kg8 27. Qe6+ Kh8 28. Qe7 Bh6 {...Qf2 is the strong threat.} 29. Nf7+ Kg8 30. e6 Bg7 31. h4 Qf2 32. Ng5 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "14"]
[White "Fier, Alexandr"]
[Black "Hungaski, Robert Andrew"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2576"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,99,41,34,61,42,39,51,52,43,68,46,90,68,93,83,95,62,62,29,71,66,83,42,40,33,37,39,35,37,65,65,77,52,49,48,55,56,116,131,118,120,125,118,104,106,172,172,189,162,229,200,441,414,478,460,516,518,517,514,481,473,822,818,1298,1300,1242,1248,1750,1800,1947,1993,29988,29983,29983,29984,29991,29992,29992,29993,29993,29994,29994,413]} 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. Bc4 Be7 6. O-O O-O 7. a4 a5 8. Re1 c6 9. h3 exd4 10. Qxd4 Ne8 {C41: Philidor Defence} (10... Nb6 11. Ba2 d5 12. exd5 Nfxd5 13. Nxd5 Nxd5 14. Bxd5 cxd5 15. Bf4 Bf5 16. c3 Be4 17. Nd2 Bg6 18. Nf1 {1-0 (38) Ragger,M (2680)-Kunin,V (2551) Minsk 2017}) 11. Be3 Nc5 12. Rad1 Be6 {White is slightly better.} 13. b3 Nd7 $146 ({Predecessor:} 13... b6 14. Bxe6 fxe6 15. e5 d5 16. Qg4 Qc8 17. Nd4 Rf7 18. h4 {1-0 (36) Dudzinski,P (2333)-Wuttke,H (2168) Germany 2013}) 14. Be2 Qc7 15. Qd2 Bf6 16. Nd4 Nc5 17. Nxe6 Nxe6 18. Bf3 h6 19. g3 Bg5 20. Bxg5 Nxg5 21. Bg2 Ne6 22. f4 Qb6+ 23. Kh2 (23. Qf2 $5 {[%cal Rf2b6]} Qb4 24. Na2 $14) 23... Qb4 24. Nb1 Qc5 25. Qc3 (25. f5 $5 {[%cal Rf5e6]}) 25... Rd8 26. Qxc5 Nxc5 27. Na3 f5 {[#]} (27... Nf6 $14) 28. exf5 $1 $16 d5 29. Nc4 Nd6 30. Nxd6 Rxd6 31. g4 h5 {[#]} (31... g6 $16) 32. Kg3 $1 $18 hxg4 33. hxg4 Rdf6 (33... Rdd8 {was necessary.} 34. Bf3 Rd7) 34. Re7 g6 $2 (34... R6f7 35. Re5 Nd7) 35. fxg6 Rxg6 36. Rde1 Rf7 37. Rxf7 Kxf7 {[%mdl 4096] Endgame KRB-KRN} 38. f5 {[%cal Bf4f5,Bf5f6][%mdl 32]} Rg8 39. Kf4 d4 (39... Rh8 $142 40. Bf3 Rh6) 40. Bf1 Rh8 41. Bc4+ Kf8 42. f6 Nd7 43. g5 {[%cal Bg4g5,Bg5g6][%mdl 32]} Rh2 44. Re7 Nb6 45. Rxb7 {White mates.} Nxc4 46. bxc4 Rxc2 47. g6 {[%cal Rb7b8]} Rf2+ 48. Ke5 {[%cal Rb7b8]} Re2+ 49. Kd6 d3 50. Rb8+ {Precision: White = 70%, Black = 32%.} (50. g7+ $142 Kg8 51. Rb8+ Re8 52. Rxe8+ Kh7 53. g8=Q+ Kh6 54. Qg7+ Kh5 55. Rh8#) 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "14"]
[White "Ramirez, Alejandro"]
[Black "Vera Siguenas, Deivy"]
[Result "1/2-1/2"]
[ECO "E62"]
[WhiteElo "2552"]
[BlackElo "2526"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,100,16,0,0,0,4,0,0,0,0,-18,0,0,18,0,0,0,0,0,0,0,0,0,0,0,0,3,52,60,59,48,71,5,11,0,0,0,15,0,0,0,0,-25,-12,-88,-87,-180,-178,-242,-242,-293,-292,-288,-262,-341,-294,-332,-329,-319,-226,-216,0,-310,0,-214,-200,-194,-34,-34,-34,-34,0,-41,0,-48,0]} 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. O-O d6 6. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} Nc6 7. Nc3 e5 8. d5 Nb8 9. e4 a5 {E62: King's Indian: Fianchetto: 6...c6 and Panno Variation (6...Nc6) without ...a6} 10. Ne1 Na6 11. Nd3 (11. f4 exf4 12. gxf4 Re8 13. Nd3 Ng4 14. h3 Bd4+ 15. Kh1 {½-½ (25) Inarkiev,E (2727)-Sutovsky,E (2650) Poikovsky 2017}) 11... Nd7 12. Be3 Ndc5 13. Nxc5 Nxc5 14. Qd2 {LiveBook: 4 Games} b6 15. Rae1 f5 16. f4 exf4 17. Bxf4 fxe4 18. Bxe4 $146 ({Predecessor:} 18. Nxe4 Nxe4 19. Rxe4 {1-0 (43) Lisitsin,G-Lilienthal,A Kiev 1954}) 18... Bh3 19. Bg2 Qd7 20. Nb5 {And now Bxh3 would win.} Bf5 21. Re3 Rae8 22. b3 Rxe3 23. Bxe3 Re8 24. Bd4 Bxd4+ 25. Nxd4 Be4 26. Re1 Qf7 27. Bh3 {Threatens to win with Be6.} Qf6 {Threatening ...Nd3.} 28. Rf1 Qe5 29. Qf2 (29. Ne6 $16 Nxe6 30. Bxe6+ Kg7 31. Re1) 29... Kh8 $11 30. Ne6 (30. Be6 $5) 30... Nxe6 31. Bxe6 Qg7 (31... Bd3 $5 {[%cal Rd3f1]} 32. Re1 Qg7 $14) 32. Qf6 (32. Qe3 {is interesting.} Bf5 33. Kg2 c6 34. Rf2 cxd5 35. cxd5 Bxe6 36. dxe6 Qe5 37. Qxb6 Qe4+ 38. Rf3) 32... Qxf6 33. Rxf6 {[%mdl 4096] Endgame KRB-KRB} Re7 34. Rf8+ Kg7 35. Rg8+ (35. Rf4 $11 Bb1 36. a3) 35... Kf6 $17 36. g4 (36. Kf2 $17 {might work better.}) 36... Ke5 $19 37. Kf2 (37. Rf8 {was necessary.}) 37... Bb1 38. Ke3 Bxa2 39. Rf8 Bxb3 40. Rf4 Bc2 41. Rf2 Be4 42. Rf4 Bb1 43. Rf1 Be4 (43... Ba2 $142 $1 {[%cal Ra2c4]} 44. Kd3 a4) 44. Rf4 $1 {[%cal Rf4e4]} Bb1 45. Rf1 $1 {[%cal Rf1b1] [#]} Ba2 $1 {[%cal Ra2c4]} 46. Kd3 b5 $2 (46... c5 $19 47. Bc8 {[#]} b5 $1 {[%mdl 512]} 48. cxb5 Kxd5) 47. Re1+ $15 Kf6 48. Rf1+ Ke5 (48... Kg5 $5 {[%cal Ra2c4]} 49. cxb5 a4 $15) 49. Re1+ Kf6 50. Rf1+ Ke5 {Precision: White = 44%, Black = 65%.} (50... Kg5 $5 {[%cal Ra2c4]} 51. cxb5 a4 $15) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "14"]
[White "Kaidanov, Gregory S"]
[Black "Iturrizaga Bonelli, Eduardo"]
[Result "0-1"]
[ECO "B38"]
[WhiteElo "2550"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "130"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,130,47,41,52,0,0,0,29,11,22,-46,-18,-22,-19,-97,-97,-97,26,-90,-86,-98,-54,-45,-61,-49,-52,-68,-67,-67,-61,-62,-52,-60,-37,-72,-76,-95,-89,-97,-95,-93,-97,-114,-122,-143,-150,-203,-198,-221,-232,-225,-195,-211,-184,-250,-223,-312,-235,-202,-158,-236,-234,-305,-297,-292,-286,-283,0,-193,0,-240,-255,-277,-253,-287,-286,-323,-327,-386,-318,-326,-321,-325,-318,-372,-372,-360,-364,-350,-325,-355,-368,-456,-442,-490,-478,-458,-389,-386,-379,-440,-486,-468,-441]} 1. Nf3 c5 2. c4 g6 3. d4 cxd4 4. Nxd4 Nc6 5. e4 Bg7 6. Be3 Nf6 7. Nc3 O-O 8. Be2 d6 9. O-O Bd7 10. Rc1 Nxd4 11. Bxd4 Bc6 12. f3 a5 13. b3 Nd7 14. Bf2 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0} (14. Be3 Nc5 15. Qd2 e6 16. Rfd1 Be5 17. Bf1 Qe7 18. Ne2 Rfd8 19. Nd4 Be8 20. Qf2 f5 21. exf5 gxf5 22. g3 Bh5 23. Ne2 {1-0 (56) Wang,H (2729)-Iturrizaga Bonelli,E (2653) Dubai 2014}) 14... Nc5 15. Qd2 {LiveBook: 5 Games} Be5 16. Bh4 $146 ({White should try} 16. Nb5 $14) ({Predecessor:} 16. Rfd1 e6 17. Nb5 Bxb5 18. cxb5 Rc8 19. Rc4 b6 20. f4 d5 21. exd5 exd5 22. Qxd5 Qxd5 23. Rxd5 {1-0 (37) Sliwicka,A (2138)-Waardenburg,F (1559) Prague 2016}) 16... Qb6 $11 17. Kh1 e6 18. Rb1 Qb4 19. Rfc1 ({White should play} 19. Be1 $1 $11) 19... f5 20. exf5 Rxf5 21. Bg3 (21. Qe1 $11) 21... Bxg3 $17 22. hxg3 Rh5+ 23. Kg1 {[#]} Nxb3 $1 {[%mdl 512] ( -> ...Qc5+)} 24. Qe3 (24. axb3 Qc5+) 24... Qc5 25. Qxc5 Nxc5 26. Rd1 Rd8 27. Nb5 Re5 28. Kf2 Bxb5 29. Rxb5 Kf7 30. Kf1 Rh5 31. Rd4 Ke7 $36 {[%mdl 2048] White is under strong pressure.} 32. Rxa5 {[#]} Ne4 $1 {[%cal Rh5h1][%mdl 512]} 33. Rxh5 (33. Rxe4 Rxa5) 33... Nxg3+ 34. Kf2 Nxh5 {[%mdl 4096] Endgame KRB-KRN} 35. f4 Nf6 36. Bf3 b6 37. Rd2 (37. g4 $17 {is a better defense.}) 37... Rc8 $19 38. Rb2 Rxc4 39. Rxb6 Rxf4 40. Rb7+ Kd8 41. Ke3 (41. Rb8+ $142 Ke7 42. Rb7+ Kf8 43. Rb8+ Kg7 44. Rb6) 41... Ra4 42. Rf7 Nd7 ({Weaker is} 42... Rxa2 43. Rxf6 Ke7 44. Rf4 $11) 43. Rxh7 Rxa2 44. Rg7 (44. Rh8+ $17 {was worth a try.} Kc7 45. Re8) 44... Ne5 45. Be4 Ra3+ 46. Kf4 Ra4 47. Ke3 Ra3+ 48. Kf4 $1 Ra4 49. Ke3 Ke8 50. Bc2 Rg4 51. Kf2 Kf8 52. Rc7 Rf4+ 53. Ke3 Rf7 54. Rc8+ Ke7 55. Bd1 Kf6 56. Be2 Ra7 57. Rf8+ Ke7 58. Rg8 Ra4 59. Rb8 d5 60. Rb5 Nc4+ 61. Kf2 Nd6 62. Rb8 Ra3 63. Bf3 Nf5 64. Rb6 Ra2+ 65. Kf1 g5 {Precision: White = 31%, Black = 77%.} 0-1

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "15"]
[White "Iturrizaga Bonelli, Eduardo"]
[Black "Vera Siguenas, Deivy"]
[Result "1-0"]
[ECO "A16"]
[WhiteElo "2663"]
[BlackElo "2526"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,73,24,18,37,26,37,20,71,48,63,64,61,69,83,68,96,85,100,88,128,131,134,138,134,127,189,176,201,159,185,133,128,83,80,81,80,73,73,74,81,54,126,116,114,91,170,162,156,167,165,140,352,360,330,331,901,887]} 1. c4 Nf6 2. Nc3 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. e4 Nc6 {[%cal Bb8c6,Bc6d4,Bd4e2][%mdl 32]} 7. Nge2 e5 8. d5 Nd4 9. O-O Nxe2+ 10. Qxe2 Ne8 {E72: King's Indian: 4 e4 d6 5 g3} 11. Be3 (11. Bd2 f5 12. exf5 gxf5 13. f4 Nf6 14. fxe5 dxe5 15. Qxe5 Ne4 16. Qf4 Nxd2 17. Qxd2 Bd7 18. c5 {1-0 (27) Nielsen,P (2628)-Golubev,M (2532) playchess.com INT 2004}) 11... f5 12. exf5 $146 ({Predecessor:} 12. f3 f4 13. Bf2 h5 14. c5 Rf7 15. cxd6 cxd6 16. Rfc1 fxg3 17. hxg3 h4 18. g4 {1-0 (41) Seepe,U (2111)-Fleger,H (2084) Ruhrgebiet 2003}) 12... Bxf5 (12... gxf5 $11 {remains equal.} 13. Rae1 Bd7) 13. c5 Nf6 14. h3 Bd7 15. Rac1 Qe8 16. Qc4 Kh8 17. Qb4 Qb8 18. a4 b6 {[#]} 19. cxd6 $1 cxd6 20. Nb5 Bxb5 21. axb5 Nd7 (21... Ng8 $16 {is a better defense.} 22. Rc6 Ne7) 22. Rc6 $18 Nc5 23. Qg4 Qd8 24. b4 (24. h4 $18) 24... Nb3 $16 25. Qe6 Rf6 {[#]} 26. Bg5 $1 {[%cal Rg5f6]} Rxe6 27. Bxd8 Re8 28. Bg5 $36 {[%mdl 2048] White is on the roll.} Bf8 29. Rc7 Kg8 ({Black should try} 29... Nd4 $14) 30. h4 Nd4 31. h5 Nf5 (31... Nxb5 $16 {might work better.} 32. Rd7 Nc3) 32. hxg6 $18 hxg6 33. Be4 Be7 34. Bd2 a6 $2 (34... Bf6 $16 35. Kg2 Re7) 35. Ra1 Nd4 36. Rxa6 Nxb5 $2 {[#]} (36... Rab8 37. Rd7 Kf7) 37. Rxe7 $1 {[%mdl 512] Precision: White = 56%, Black = 39%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "15"]
[White "Kaidanov, Gregory S"]
[Black "Fier, Alexandr"]
[Result "1/2-1/2"]
[ECO "A34"]
[WhiteElo "2550"]
[BlackElo "2576"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,103,0,0,-7,0,-9,2,0,0,-2,-13,-31,24,27,18,17,28,0,0,0,32,0,0,0,14,0,0,-75,-69,-129,27,-3,0,-283,0,0,0,0,25,0,0,0,0,0,0,0,16,0,0,0,0,-8,-8,-11,-21,-12,-22,-72,0,0,0,-48,-20,-79,-82,-71,-83,-170,-174,-220,-200,-197,-192,-175,0,0,0,-156,0,-342]} 1. Nf3 Nf6 {[%cal Bg8f6,Bf6d5,Bd5b4,Bb4d3,Bd3f4][%mdl 32]} 2. c4 c5 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nb4 6. Bc4 Nd3+ 7. Ke2 Nf4+ 8. Kf1 Nd3 9. Ke2 Nf4+ {A34: Symmetrical English: 2 Nc3, lines with ...d5} 10. Kf1 Nd3 11. Qe2 Nxc1 12. Rxc1 Nc6 13. h4 e6 {LiveBook: 3 Games} 14. h5 h6 15. e5 a6 {[#]} 16. Bd3 $146 ({Predecessor:} 16. Rh3 b5 17. Bd3 {½-½ (63) Sutovsky,E (2660)-Nepomniachtchi,I (2723) Poikovsky 2013}) 16... Bd7 17. Be4 Qc7 18. Rh3 Nxe5 {[#]} (18... O-O-O $15) 19. Bxb7 $1 $11 {[%mdl 512]} Qxb7 20. Nxe5 Be7 21. Nxd7 Qxd7 22. Ne4 Qd4 23. Rhc3 {[%cal Re4c5]} O-O 24. b3 {[%cal Re4c5]} Rfd8 25. Rc4 Qe5 26. Nxc5 (26. g4 $11 {keeps the balance.}) 26... Qh2 $17 {[%cal Rh2h1]} 27. Qf3 (27. f4 $15) 27... Rd5 $2 (27... Rxd2 $17 {[%cal Rh2h1]} 28. Qxa8+ Kh7) 28. Ne4 Rad8 {aiming for ...Rd3.} 29. Rc7 $2 {[%mdl 8192]} (29. Rc8 $11) 29... Rf5 $2 (29... Rd3 $1 $19 {[%cal Rd3f3]} 30. Qxd3 (30. Qg4 $2 f5 $19) 30... Rxd3 31. Rxe7 Qh1+ 32. Ke2 Qxc1 33. Re8+ Kh7 34. Kxd3 Qc7) 30. Qh3 $11 Qxh3 31. gxh3 Bh4 32. Rc8 Rxh5 33. Rxd8+ Bxd8 {[%mdl 4096] Endgame KRB-KRN} 34. Rc8 Rd5 35. Ke2 Kh7 36. Rc5 Rd7 37. Rc6 a5 $1 38. Rd6 (38. Nd6 {seems wilder.} g5 39. Nc4 Rd4 40. d3 Rd5 41. Ne3) 38... Rxd6 39. Nxd6 {KB-KN} f5 40. a4 g5 41. Kf3 Be7 (41... Kg6 $17) 42. Nc4 Bb4 43. d3 Kg7 44. Ne5 (44. Ke3 $11) 44... h5 45. Nc6 Bc3 46. Ke2 (46. d4 $17) 46... g4 $1 $19 47. h4 f4 48. d4 {[#]} Kf6 $1 49. Kd3 Be1 50. Ke2 Bc3 51. Kd3 {[#]} Be1 $2 (51... g3 $1 $17 {[%cal Rg3g2]} 52. fxg3 fxg3) 52. Ke4 $2 {[%mdl 40960] Precision: White = 25%, Black = 49%. . An unexpected result.} (52. Ke2 $11 {and White has nothing to worry.} Bc3) 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "15"]
[White "Hungaski, Robert Andrew"]
[Black "Ramirez, Alejandro"]
[Result "1/2-1/2"]
[ECO "B47"]
[WhiteElo "2492"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,110,18,15,22,0,0,0,37,29,38,47,87,18,25,39,25,14,91,97,95,81,89,71,67,79,68,72,60,-41,-30,-105,-105,-104,-69,-134,-133,-204,-208,-189,-183,-141,-45,-41,-49,-47,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Ndb5 Qb8 7. Be3 a6 8. Bb6 axb5 9. Nxb5 Bb4+ 10. c3 Ba5 {B47: Sicilian: Taimanov: 5 Nc3 Qc7 6 f4, 6 g3 and 6 Be2} 11. Nc7+ Qxc7 12. Bxc7 Bxc7 13. Qg4 g6 14. Bb5 {[#] LiveBook: 16 Games} Nf6 $146 ({Predecessor:} 14... Nge7 15. Qe2 d5 16. O-O O-O 17. Rfd1 dxe4 18. Qxe4 {½-½ (34) Popov,I (2632)-Gagunashvili,M (2601) Denizli 2013}) 15. Qe2 O-O 16. O-O e5 17. Rfd1 d6 18. a4 Be6 19. b4 (19. Bc4 $16) 19... d5 $11 20. exd5 Nxd5 21. Rac1 Rfd8 (21... Bd8 $11 {keeps the balance.}) 22. a5 $16 Nce7 23. g3 Rac8 24. a6 bxa6 25. Bxa6 Rb8 26. Bc4 h5 27. Qa2 (27. Qe1 $14) 27... e4 $15 28. Rd4 (28. Re1 $11) 28... e3 $1 $17 {[%cal Re3f2]} 29. fxe3 {[#] Threatens to win with Rcd1.} Bb6 $1 30. Qd2 {[#]} ({White should try} 30. Qb3 $15) 30... Nf5 $1 {[%cal Rf5e3]} ({But not} 30... Bxd4 $6 31. exd4 Nf5 32. Bb3 $11) 31. Bxd5 (31. Re1 $17) 31... Nxd4 $19 32. exd4 {Hoping for Bxe6.} Rxd5 ({Don't do} 32... Bxd5 33. c4 $15) 33. Re1 Rc8 (33... Ra8 $17 34. Qh6 Rd6) 34. Rxe6 $1 $15 fxe6 35. Qh6 Kf7 (35... Rc6 $5 {[%cal Re6e5]} 36. Qxg6+ Kf8 $15) 36. Qh7+ {The position is equal.} Kf6 37. Qb7 {[#]} Bxd4+ $1 38. cxd4 $11 {[%mdl 4096] Endgame KQ-KRR} Rc1+ 39. Kf2 Rxd4 40. Qb8 Rdc4 41. Qf8+ Ke5 42. Qg7+ Kd6 43. Qxg6 R1c2+ 44. Ke3 h4 45. gxh4 R2c3+ 46. Kd2 Rh3 47. Qf6 Rhxh4 48. Qd8+ Ke5 49. Qg5+ Kd6 50. Qd8+ Kc6 51. Qc8+ (51. b5+ $5 Kxb5 52. Qd7+ Kb4 53. Qd6+ Kb5 54. Qxe6 $11) 51... Kd5 52. Qd8+ Ke5 {( -> ...Rcd4+)} 53. Qg5+ Kd6 54. Qd8+ Kc6 55. Qc8+ Kd5 {Precision: White = 68%, Black = 70%.} 1/2-1/2

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "16"]
[White "Fier, Alexandr"]
[Black "Iturrizaga Bonelli, Eduardo"]
[Result "1-0"]
[ECO "A47"]
[WhiteElo "2576"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,97,36,15,30,25,52,46,63,56,47,25,71,58,58,62,31,9,66,20,41,17,33,28,72,20,17,15,18,10,24,10,29,20,15,19,51,41,83,45,94,62,84,74,70,86,260,250,447,475,575,562,504,432,389,238,767,572,29987,472,448,458,532,535,504,489,693,679,807,726,568,384,317,0,12831,12831,12832,12832,12831,476,1278,1253,12837,0,415,0,29988,29989,29991,29992]} 1. d4 Nf6 2. Nf3 b6 3. c4 Bb7 4. Nc3 d5 5. cxd5 Nxd5 6. e3 {[%cal Be2e3,Be3e4][%mdl 32] LiveBook: 6 Games. A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6)} Nxc3 (6... g6 7. Bb5+ c6 8. Bd3 Bg7 9. O-O O-O 10. Na4 Nd7 11. e4 Nc7 12. Bf4 Ne6 13. Be3 c5 14. dxc5 Ndxc5 15. Nxc5 bxc5 {0-1 (43) Gajewski,G (2654)-Mamedyarov,S (2736) Berlin 2015}) 7. bxc3 g6 8. h4 {White is slightly better.} h6 $146 ({Predecessor:} 8... Bg7 9. h5 O-O 10. Bd3 Nd7 11. Qb3 Bxf3 12. gxf3 Nc5 13. Qc2 Nxd3+ 14. Qxd3 {1-0 (36) Frank,W (1982)-Buerger,H (1687) Ellwangen 2003}) 9. Bb5+ c6 10. Bd3 Nd7 11. e4 e5 12. a4 (12. dxe5 Bg7 $11) 12... Bg7 13. Be3 Qe7 (13... exd4 $11 14. cxd4 c5) 14. h5 g5 15. a5 O-O 16. O-O Kh8 17. axb6 ({White should play} 17. Qe2 $16) 17... axb6 $11 18. Rxa8 Rxa8 19. Qb3 Ra3 20. Qb2 b5 21. Ra1 Rxa1+ 22. Qxa1 exd4 23. Nxd4 Qd6 {Hoping for ...c5.} 24. Qa7 Qc7 25. Be2 Be5 26. Nf5 $36 {[%mdl 2048] White has strong initiative.} Kh7 27. Bd4 {Qa2 is the strong threat.} Bxd4 $2 (27... Bh2+ $16 {is a better defense.} 28. Kh1 c5 29. Bxb5 (29. Qa2 Ne5 $15) 29... Bxe4 30. Qxc7 Bxc7 31. Bxd7 cxd4 32. Nxd4 Kg7) 28. cxd4 $18 ({But not} 28. Qxd4 $6 f6 $16) 28... Nf8 $2 (28... c5 {was called for.} 29. Bxb5 cxd4 30. Qxd4 Ne5) 29. e5 Ne6 30. Nd6 Nd8 31. Bd3+ Kg8 32. Qc5 {Strongly threatening Bb1.} Qd7 $2 (32... Ne6 33. Qa7 Nd8) 33. Bf5 Qc7 34. Be4 (34. Ne4 $142 Kg7 35. Nf6 Qa5 36. Nd7 Ne6 37. Bxe6 Qd8 38. Bf5 Bc8 39. e6) 34... Qa5 {intending ...Qe1+.} 35. g3 ({Weaker is} 35. Nxb7 Qe1+ 36. Kh2 Qxf2 $11) 35... Bc8 36. Nxc8 {aiming for Ne7+.} Qe1+ 37. Kh2 {White threatens Ne7+ and mate.} Qxe4 (37... Qxf2+ $142 38. Bg2 Qe2 39. Ne7+ Kh7) 38. Qe7 $1 {[%cal Re7d8]} Qxd4 39. Qf6 Kh7 40. Qf5+ Kg8 {[#]} 41. Qf6 $2 (41. Nd6 $1 $18) 41... Qd7 $2 {[%mdl 8192]} (41... Kh7 $11) 42. Ne7+ Kh7 43. Nf5 {[%csl Gf5][%cal Rf6g7]} Ne6 44. Qxh6+ (44. Nxh6 $142 Nd8 45. Qxg5) 44... Kg8 {If only Black now had time for ...Qd8....} 45. Qf6 {White wants to mate with Nh6+.} Kh7 46. Qh6+ (46. Nd6 $142 Kg8 47. h6) 46... Kg8 {[#] and the idea ...Qd8 leaves Black hopeful.} 47. Qf6 $2 (47. Nd6 $1 $18 {[%cal Rd6e4] And now Ne4 would win.} Nc5 48. e6 Qxe6 49. Qxg5+ Kh8 50. Qxc5) 47... Qa7 $2 {[%mdl 8192]} (47... Kh7 $11 48. h6 c5) 48. Ne7+ Kf8 49. Nxc6 {Precision: White = 52%, Black = 33%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "16"]
[White "Ramirez, Alejandro"]
[Black "Kaidanov, Gregory S"]
[Result "1-0"]
[ECO "A06"]
[WhiteElo "2552"]
[BlackElo "2550"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,69,0,0,0,4,0,30,36,29,42,26,17,49,57,47,52,48,46,63,59,51,29,37,39,41,38,118,107,127,96,79,79,119,121,160,161,160,147,223,143,150,133,140,143,137,136,313,302,491,504,686,427,836,832,1008,987,943,924]} 1. Nf3 d5 2. c4 e6 3. b3 Nf6 4. g3 c5 5. Bg2 Nc6 6. cxd5 {A13: English Opening: 1...e6} (6. O-O Be7 7. Bb2 O-O 8. e3 b6 9. Qe2 Bb7 10. Rd1 Qc7 11. Nc3 Rac8 12. cxd5 Nxd5 13. Nxd5 exd5 14. d4 Rfd8 15. Rac1 Bf8 16. dxc5 bxc5 17. Nh4 Nb4 18. Qg4 Nxa2 19. Ra1 Nb4 20. Rxa7 {1-0 (29) Kramnik,V (2772)-Jakovenko,D (2736) Moscow 2009}) (6. O-O d4 7. e3 Be7 8. exd4 cxd4 9. d3 O-O 10. Na3 e5 11. Nc2 Bf5 12. Re1 Qc7 13. b4 e4 14. Bf4 Qd8 15. dxe4 Bxe4 {1-0 (33) Ramirez,A (2594)-Kaidanov,G (2569) Saint Louis 2011}) 6... exd5 7. d4 cxd4 {LiveBook: 5 Games} 8. Nxd4 {The position is equal.} Bb4+ 9. Bd2 Qb6 (9... Bd6 {keeps more tension.} 10. Bc3 O-O 11. O-O Re8 12. e3 Bg4) 10. Nxc6 bxc6 11. O-O O-O $146 ({Predecessor:} 11... Bf5 12. Nc3 O-O 13. Na4 Qb5 14. Bxb4 Qxb4 {½-½ (62) Krutti,V (2357)-Balogh,C (2235) Budapest 1999}) 12. Nc3 Re8 13. Na4 Qb5 14. Bxb4 Qxb4 15. Qc2 Bg4 16. e3 $1 Rac8 17. Rfc1 d4 18. exd4 Qxd4 19. Qc5 (19. Qc3 $5 {[%cal Rc3d4]} Qd6 20. Qa5 $14) 19... Qd2 ({Better is} 19... Qd7 $14) 20. h3 $36 {[%mdl 2048] White is really pushing.} Be6 21. Rd1 Qh6 22. Rd4 {[%cal Bd1d4,Bd4f4,Bf4e4,Be4e5,Be5e6][%mdl 32]} Bd5 23. Nc3 Nd7 24. Qxa7 Bxg2 25. Kxg2 Ne5 (25... Nf8 $16 {might work better.}) 26. Qa6 Nf3 27. Rf4 Ng5 28. h4 Ne6 29. Re4 f5 $2 {[#]} (29... c5 $16 30. Rae1 Red8) 30. Re5 $18 Kh8 $2 (30... f4 {was worth a try.} 31. Rae1 Nc7 32. Qc4+ Kh8 33. Rxe8+ Nxe8) 31. Rae1 {White is clearly winning.} Rcd8 32. Qc4 Rd6 (32... Nc7 $142 33. Qf7 Rxe5 34. Rxe5 Qd6) 33. Na4 f4 34. Nc5 fxg3 35. Rxe6 {Precision: White = 88%, Black = 29%.} 1-0

[Event "XII Americas Continental-ch 2017"]
[Site "Medellin"]
[Date "2017.06.18"]
[Round "16"]
[White "Vera Siguenas, Deivy"]
[Black "Hungaski, Robert Andrew"]
[Result "1/2-1/2"]
[ECO "C44"]
[WhiteElo "2526"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "19"]
[EventDate "2017.??.??"]
[EventType "swiss"]
[EventCountry "COL"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,19,8,11,4,0,0,-10,0,0,16,10]} 1. e4 e5 2. Nf3 Nc6 3. Be2 Nf6 4. d3 Bc5 5. O-O d6 6. c3 {The position is equal.} a6 {C44: Ponziani Opening and Scotch Gambit} 7. b4 (7. d4 Ba7 8. dxe5 Nxe5 9. Nxe5 dxe5 10. Qxd8+ Kxd8 11. Bg5 h6 12. Bxf6+ gxf6 13. Nd2 {½-½ (51) Blomqvist,E (2496)-Grandelius,N (2588) Borlange 2014}) 7... Ba7 8. Na3 h6 9. Nc4 O-O 10. Be3 $146 ({Predecessor:} 10. a3 d5 11. Ncd2 Qe7 12. Qc2 dxe4 13. dxe4 Nh5 14. Nc4 {½-½ (41) Dostan,J (2315)-Palvolgyi,I (2212) Hungary 2007}) 1/2-1/2

