[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

