[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "1"]
[White "Granda Zuniga, Julio E"]
[Black "Delgado Fernandez, Enrique"]
[Result "1-0"]
[ECO "E17"]
[WhiteElo "2650"]
[BlackElo "1733"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,52,10,16,16,-3,12,12,17,10,59,9,86,79,107,101,216,206,216,202,201,203,191,193,198,188,211,203,212,204,334,335,750,754,1813]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O b6 7. cxd5 exd5 8. Nc3 Bb7 9. b3 Nbd7 10. Bb2 Re8 11. Qc2 {LiveBook: 12 Games. E17: Queen's Indian: 4 g3 Bb7 5 Bg2 Be7} (11. Rc1 Bf8 12. Qc2 a6 13. Rfd1 Rc8 14. e3 Qe7 15. Ne5 Qe6 16. Ne2 c6 17. Nf4 Qd6 18. Bh3 Rc7 19. b4 {½-½ (39) Leko,P (2691)-Bacrot,E (2725) Riadh 2017}) 11... Rc8 12. Rad1 c5 13. Qb1 {The position is equal.} c4 $146 ({Predecessor:} 13... Nf8 14. Nh4 c4 15. Ba1 Bb4 16. Bf3 Qd7 17. Ng2 Bxc3 18. Bxc3 {½-½ (32) Ursan,P (1904)-Tomici,S (2222) Calimanesti 2014}) 14. bxc4 Rxc4 15. e3 Qc7 (15... a6 $11) 16. Rc1 a6 17. Nd2 Rc6 (17... Bb4 $16) 18. Nxd5 $18 Nxd5 19. Bxd5 Rxc1 20. Rxc1 Qb8 21. Bxb7 Qxb7 22. Qc2 Nf6 23. Qc6 Qb8 24. d5 Bc5 (24... Rd8 {was worth a try.} 25. e4 Nd7) 25. Bxf6 Rc8 $2 {[#]} (25... gxf6 26. Rc4 f5) 26. Be5 $1 b5 {Accuracy: White = 67%, Black = 14%.} (26... Qxe5 27. Qxc8+) 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "1"]
[White "Flores, Diego"]
[Black "Matamala Clemente, Javier"]
[Result "1-0"]
[ECO "A39"]
[WhiteElo "2631"]
[BlackElo "1689"]
[Annotator "TA"]
[PlyCount "43"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,43,62,84,33,110,102,181,168,183,184,211,204,201,214,212,215,211,203,202,216,329,334,576,567,563,553,772,751]} 1. c4 c5 2. Nf3 Nf6 3. Nc3 Nc6 4. g3 g6 5. Bg2 Bg7 6. d4 cxd4 7. Nxd4 O-O 8. O-O a6 9. c5 Qc7 {LiveBook: 12 Games} 10. Na4 {A39: Symmetrical English vs ...g6: 4 Bg2 Bg7 5 Nf3 Nf6 6 0-0 0-0 7 d4} ({Better is} 10. Qa4 $16) (10. Bg5 Qe5 11. Nxc6 dxc6 12. Bxf6 Bxf6 13. Na4 Bg4 14. Re1 Rad8 15. Qb3 Bc8 16. e3 Rd2 17. Rad1 Rfd8 18. Rxd2 Rxd2 {0-1 (63) Ribli,Z (2526)-Ljubojevic,L (2571) Platja d'Aro 2017}) 10... e5 (10... Rb8 $14) 11. Nb3 $16 Rd8 (11... Rb8 $16 {might work better.}) 12. Nb6 $18 {White is clearly better.} Rb8 13. Bg5 Ne7 $146 ({Predecessor:} 13... Rf8 14. Rc1 h6 15. Bxf6 Bxf6 16. Nd5 Qd8 17. Nxf6+ Qxf6 {½-½ (47) Bogumil,T (2218)-Della Rossa,A (1868) St Petersburg 2009}) 14. Qd6 Qxd6 15. cxd6 Nc6 16. Nc5 h6 17. Bxf6 Bxf6 18. Bh3 Nd4 (18... e4 {keeps fighting.} 19. Nxc8 (19. Nxe4 Bd4 $16) (19. Ncxd7 Bd4 $16) (19. Bxd7 Bd4 $16) 19... Rbxc8) 19. e3 ({Less strong is} 19. Ncxd7 Bg7 $14) (19. Bxd7 Nxe2+ 20. Kg2 Bg7 $18) 19... Ne6 $2 {[#]} (19... Nb5 20. Rad1 (20. Nbxd7 Bg7 $18) 20... Na7 21. Ncxd7 Bg7 22. Nf6+ {[%mdl 64] Clearance} (22. Nxb8 Bxh3 23. d7 e4 $11) 22... Bxf6) 20. Bxe6 {White is clearly winning.} fxe6 21. Ne4 Bg7 22. Rac1 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "1"]
[White "Pichot, Alan"]
[Black "Figueroa Bernal, Julia Dennis"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2562"]
[BlackElo "1737"]
[Annotator "ChessBase"]
[PlyCount "31"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. c4 {[%emt 0:00:00]} c5 {[%emt 0:00:00]} 2. Nf3 {[%emt 0:00:14]} Nf6 {[%emt 0:00:15]} 3. Nc3 {[%emt 0:00:36]} e6 {[%emt 0:01:03]} 4. g3 {[%emt 0:01:02]} Be7 {[%emt 0:01:32]} 5. Bg2 {[%emt 0:00:10]} O-O {[%emt 0:00:24]} 6. d4 {[%emt 0:03:25]} cxd4 {[%emt 0:02:28]} 7. Nxd4 {[%emt 0:00:07]} a6 {[%emt 0:00:07]} 8. O-O {[%emt 0:00:53]} Qc7 {[%emt 0:01:23]} 9. Qd3 {[%emt 0:02:40]} Nc6 {[%emt 0:06:47]} 10. b3 {[%emt 0:02:36]} b6 {[%emt 0:02:57]} 11. Bf4 {[%emt 0:02:18]} e5 {[%emt 0:01:19]} 12. Nf5 {[%emt 0:01:42]} Bb4 {[%emt 0:22:33]} 13. Bg5 {[%emt 0:01:45]} d6 {[%emt 0:04:52]} 14. Bxf6 {[%emt 0:02:33]} Bxc3 {[%emt 0:10:32]} 15. Bxc6 {[%emt 0:00:53]} Bxf5 {[%emt 0:00:40]} 16. Qxf5 {[%emt 0:00:53]} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "1"]
[White "Castillo Palma, Hernan"]
[Black "Bacallao Alonso, Yusnel"]
[Result "0-1"]
[ECO "E00"]
[WhiteElo "1710"]
[BlackElo "2582"]
[Annotator "ChessBase"]
[PlyCount "76"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. d4 {[%emt 0:00:00]} Nf6 {[%emt 0:00:35]} 2. c4 {[%emt 0:00:31]} e6 {[%emt 0:00:12]} 3. a3 {[%emt 0:00:20]} c5 {[%emt 0:00:33]} 4. d5 {[%emt 0:01:08]} exd5 {[%emt 0:00:23]} 5. cxd5 {[%emt 0:00:21]} g6 {[%emt 0:00:13]} 6. Nc3 {[%emt 0:00:42]} Bg7 {[%emt 0:00:07]} 7. e4 {[%emt 0:03:13]} O-O {[%emt 0:01:14]} 8. Bd3 {[%emt 0:00:12]} d6 {[%emt 0:01:51]} 9. Nge2 {[%emt 0:02:18]} Nbd7 {[%emt 0:01:25]} 10. O-O {[%emt 0:03:52]} a6 {[%emt 0:00:20]} 11. Rb1 {[%emt 0:08:00]} Nh5 {[%emt 0:11:39]} 12. f4 {[%emt 0:08:26]} Qc7 {[%emt 0:12:44]} 13. g4 {[%emt 0:12:01]} Nhf6 {[%emt 0:00:11]} 14. Ng3 {[%emt 0:00:46]} c4 {[%emt 0:05:29]} 15. Bc2 {[%emt 0:02:35]} Nc5 {[%emt 0:01:09]} 16. g5 {[%emt 0:08:00]} Nfd7 {[%emt 0:03:18]} 17. Be3 {[%emt 0:05:08]} b5 {[%emt 0:01:53]} 18. h4 {[%emt 0:03:49]} f6 {[%emt 0:02:08]} 19. Kg2 {[%emt 0:03:59]} Rb8 {[%emt 0:03:28]} 20. Bd4 {[%emt 0:07:12]} a5 {[%emt 0:01:24]} 21. Qd2 {[%emt 0:10:24]} b4 {[%emt 0:03:57]} 22. Nce2 {[%emt 0:03:00]} Bb7 {[%emt 0:05:31]} 23. h5 {[%emt 0:04:28]} b3 {[%emt 0:05:04]} 24. Bd1 {[%emt 0:00:07]} Nd3 {[%emt 0:00:48]} 25. Nc3 {[%emt 0:00:41]} N7c5 {[%emt 0:36:54]} 26. hxg6 {[%emt 0:03:25]} hxg6 {[%emt 0:00:00]} 27. Bg4 {[%emt 0:00:36]} fxg5 {[%emt 0:00:00]} 28. Bxg7 {[%emt 0:00:11]} Qxg7 {[%emt 0:00:00]} 29. fxg5 {[%emt 0:01:20]} Qd4 {[%emt 0:00:00]} 30. Nb5 {[%emt 0:02:08]} Qe5 {[%emt 0:00:00]} 31. Qc3 {[%emt 0:03:28]} Qxg5 {[%emt 0:00:00]} 32. Be6+ {[%emt 0:01:01]} Nxe6 {[%emt 0:00:00]} 33. dxe6 {[%emt 0:00:14]} Bxe4+ {[%emt 0:00:00]} 34. Kh3 {[%emt 0:01:11]} Qh6+ {[%emt 0:00:00]} 35. Kg4 {[%emt 0:00:18]} Rf4+ {[%emt 0:00:00]} 36. Rxf4 {[%emt 0:00:15]} Qxf4+ {[%emt 0:00:00]} 37. Kh3 {[%emt 0:00:40]} Qh6+ {[%emt 0:00:00]} 38. Kg4 {[%emt 0:00:18]} Nf2# {[%emt 0:06:30]} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "1"]
[White "Aranguiz Olave, Emilio Antonio"]
[Black "Cruz, Cristhian"]
[Result "0-1"]
[ECO "A06"]
[WhiteElo "1679"]
[BlackElo "2561"]
[Annotator "ChessBase"]
[PlyCount "64"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. b3 {[%emt 0:00:00]} d5 {[%emt 0:00:00]} 2. Bb2 {[%emt 0:00:00]} Bg4 {[%emt 0:00:00]} 3. Nf3 {[%emt 0:00:30]} Bxf3 {[%emt 0:00:02]} 4. gxf3 {[%emt 0:00:05]} Nd7 {[%emt 0:00:27]} 5. e3 {[%emt 0:05:06]} Ngf6 {[%emt 0:00:18]} 6. f4 {[%emt 0:01:44]} e6 {[%emt 0:00:43]} 7. Rg1 {[%emt 0:01:40]} g6 {[%emt 0:00:36]} 8. d3 {[%emt 0:02:10]} Bd6 {[%emt 0:08:30]} 9. Nd2 {[%emt 0:01:34]} Qe7 {[%emt 0:00:14]} 10. Bh3 {[%emt 0:03:53]} O-O-O {[%emt 0:07:50]} 11. Nf3 {[%emt 0:01:04]} Kb8 {[%emt 0:01:36]} 12. Ne5 {[%emt 0:01:33]} Rhf8 {[%emt 0:01:18]} 13. a4 {[%emt 0:01:58]} Ne8 {[%emt 0:06:08]} 14. d4 {[%emt 0:02:46]} c5 {[%emt 0:02:26]} 15. Qe2 {[%emt 0:01:24]} cxd4 {[%emt 0:04:23]} 16. exd4 {[%emt 0:00:12]} Nc7 {[%emt 0:01:17]} 17. a5 {[%emt 0:01:34]} a6 {[%emt 0:01:15]} 18. c4 {[%emt 0:01:36]} Qh4 {[%emt 0:11:31]} 19. Qe3 {[%emt 0:05:07]} Nxe5 {[%emt 0:04:58]} 20. fxe5 {[%emt 0:01:43]} Be7 {[%emt 0:00:38]} 21. Rg4 {[%emt 0:04:59]} Qh5 {[%emt 0:00:05]} 22. Qg3 {[%emt 0:01:36]} g5 {[%emt 0:06:29]} 23. Ba3 {[%emt 0:02:22]} Bxa3 {[%emt 0:00:32]} 24. Rxa3 {[%emt 0:00:07]} h6 {[%emt 0:01:55]} 25. Bf1 {[%emt 0:01:17]} f5 {[%emt 0:03:48]} 26. exf6 {[%emt 0:00:35]} Rxf6 {[%emt 0:00:04]} 27. Ra2 {[%emt 0:02:00]} Rdf8 {[%emt 0:00:43]} 28. Bg2 {[%emt 0:03:03]} Qg6 {[%emt 0:06:12]} 29. Rb2 {[%emt 0:00:58]} Rf5 {[%emt 0:03:05]} 30. h4 {[%emt 0:03:15]} Qg7 {[%emt 0:00:37]} 31. hxg5 {[%emt 0:01:39]} h5 {[%emt 0:00:14]} 32. cxd5 {[%emt 0:11:05]} exd5 {[%emt 0:00:28]} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "1"]
[White "Lobos Astorga, Mario Rolando"]
[Black "Delgado Ramirez, Neuris"]
[Result "0-1"]
[ECO "B52"]
[WhiteElo "1652"]
[BlackElo "2620"]
[Annotator "TA"]
[PlyCount "50"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,50,0,-3,-17,-4,-28,-23,-34,-39,-27,-24,-18,-12,-56,-54,-140,-67,-114,-97,-177,-147,-176,-106,-226,-215,-220,-211,-221,-225,-202,-224,-234,-228,-373,-358,-514,-450]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. d4 cxd4 6. Qxd4 Ngf6 7. O-O g6 {B52: Sicilian: Moscow Variation with 3...Bd7} 8. Nc3 (8. c4 Bg7 9. Nc3 O-O 10. Bd2 a6 11. Qd3 b5 12. cxb5 axb5 13. b4 Ra3 14. Nd4 Nc5 15. Qc2 Nfxe4 16. Nxe4 Bxd4 17. bxc5 Bxa1 18. Rxa1 dxc5 19. Qxc5 {1-0 (57) Malakhov,V (2709)-Wei,Y (2530) China 2013}) 8... Bg7 {LiveBook: 6 Games} 9. Be3 O-O {The position is equal.} 10. Qd2 Nb6 11. Qe2 Rc8 12. Rad1 $146 ({Predecessor:} 12. Nd2 Nfd7 13. Bxb6 Nxb6 14. Qd3 Bxc3 15. bxc3 Qc7 16. c4 Nxc4 17. Nxc4 Qxc4 {0-1 (32) Thomas,F (1610)-Aoustin,A (2020) Orleans 2004}) 12... Nc4 13. Bc1 Nd7 14. Rd3 Re8 15. Rfd1 (15. b3 $15 Qa5 16. Nd1) 15... Qa5 (15... Nc5 $1 $17 16. Rd5 Nb6) 16. Rd5 {[#]} Qa6 $1 17. Qe1 (17. Nd4 $17 {keeps fighting.}) 17... e6 $36 {[%mdl 2048] Keeping White busy.} 18. Rg5 {[#]} Na3 ({Black should try} 18... d5 $1 $19 {[%mdl 512]} 19. Nd4 (19. exd5 exd5) 19... e5) 19. Qd2 (19. e5 $17 Nc4 20. exd6) 19... Bxc3 $1 $19 20. bxc3 Nb1 21. Qxd6 Qxd6 22. Rxd6 Nc5 23. Rd4 f6 24. Rg3 (24. Rg4 $142 e5 25. Rd1 Nxc3 26. Re1) 24... Nxc3 {[%mdl 64] Double Attack} 25. e5 (25. Kf1 $142 e5 26. Rb4) 25... Ne2+ {Accuracy: White = 15%, Black = 77%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "2"]
[White "Delgado Ramirez, Neuris"]
[Black "Adasme Fredes, Mauricio"]
[Result "1-0"]
[ECO "B50"]
[WhiteElo "2623"]
[BlackElo "2103"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,91,-23,-24,-32,8,-11,19,14,19,0,0,0,0,0,0,0,0,0,6,-4,14,-1,2,0,5,-33,-32,-22,-19,-25,-20,-24,-13,-42,-2,-37,-33,-60,-59,-54,-44,-88,-84,-191,-191,-183,-191,-176,-181,-174,-202,-207,-174,-180,-126,-121,-113,-122,-118,-123,-122,-132,-75,-84,-60,-56,-69,-65,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. g3 Nc6 5. Bg2 d6 6. O-O Nf6 7. d3 Be7 8. Ng5 {[%cal Bf3g5,Bg5h3,Bh3f2][%mdl 32]} h6 9. Nh3 Qc7 10. f4 Bd7 {[%cal Bc8d7,Bd7c6,Bc6b7][%mdl 32] LiveBook: 8 Games. B50: Sicilian: 2...d6, Miscellaneous} (10... b5 11. a3 Bb7 12. g4 Nd7 13. f5 Nde5 14. Nf4 Nd4 15. Nce2 exf5 16. gxf5 Bg5 17. Ng3 b4 18. c3 bxc3 19. bxc3 {1-0 (44) Shabalov,A (2544)-Ramirez Alvarez,A (2568) chess.com INT 2018}) 11. a3 Nd4 12. Be3 Rc8 $146 ({Predecessor:} 12... Bc6 13. Nb1 Qb6 14. Ra2 d5 15. Nd2 dxe4 16. dxe4 Rd8 17. c3 Nb5 18. Qe2 {0-1 (46) Vazquez,G (2296)-Salinas Herrera,P (2366) Paraguay 2012}) 13. Nf2 b5 14. g4 Bc6 15. Nb1 {[%cal Bc3b1,Bb1d2,Bd2f3][%mdl 32] Black must now prevent c3.} e5 16. f5 Bb7 17. c3 Nc6 18. b4 Nd7 19. Nd2 Nb6 20. Nf3 Na4 21. Rc1 c4 22. Qd2 cxd3 23. c4 Nb6 $1 {[%cal Rb6c4]} 24. cxb5 axb5 25. Qxd3 Nc4 26. Rc3 O-O 27. h4 Rfd8 28. g5 {[#] f6 is the strong threat.} d5 $1 {[%cal Rd5d4]} 29. exd5 Rxd5 30. Qxd5 Nd4 $1 $36 {[%cal Bc6d4,Bd4e2,Be2c3][%mdl 2080] Keeping White busy.} 31. Qxb7 (31. Rxc4 $17 bxc4 32. Qa5 Nxf3+ 33. Bxf3 Qxa5 34. bxa5 Bxf3 35. f6) 31... Ne2+ $19 {[%mdl 64] Double Attack} 32. Kh2 Qxb7 33. Ng1 {[#]} Qxg2+ $1 {[%mdl 512]} 34. Kxg2 Nxc3 35. Bc1 hxg5 36. hxg5 Ra8 (36... Na2 $19 37. Ne2 Nxc1 38. Rxc1 Bxg5) 37. Nf3 $17 Ne2 38. Ne4 Nxc1 39. Rxc1 Rxa3 40. f6 Bxb4 (40... Bf8 $142 41. Nh4 g6) 41. Rb1 Ra2+ 42. Kg3 Rb2 43. Rd1 Bf8 (43... gxf6 $15 44. gxf6 Re2) 44. Rd8 $11 {The position is equal.} b4 45. Nc5 gxf6 46. gxf6 {[%mdl 32768] Accuracy: White = 74%, Black = 65%. . Loss on time!?} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "2"]
[White "Bacallao Alonso, Yusnel"]
[Black "Garmendia Vega, Gabriel"]
[Result "1-0"]
[ECO "E61"]
[WhiteElo "2583"]
[BlackElo "2041"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,95,22,41,39,82,89,82,88,145,91,85,79,112,123,129,44,138,138,141,138,151,141,140,150,132,134,133,133,145,137,133,122,119,107,107,107,114,108,133,125,120,118,114,102,230,231,318,366,332,365,373,370,373,365,373,366,368,369,373,373,354,345,637,597,1851,2046,29989,29990,29990,29991,29991,29991,29995,29996]} 1. Nf3 c5 2. c4 g6 3. e3 Bg7 4. d4 Nf6 5. Nc3 O-O 6. d5 e6 7. Be2 d6 8. Nd2 {E61: King's Indian: Early deviations for White, including Smyslov System} exd5 9. cxd5 Na6 (9... Re8 10. O-O Na6 11. e4 Rb8 12. a4 Nb4 13. f3 {1-0 (36) Grischuk,A (2766)-Vachier Lagrave,M (2789) Paris 2018}) 10. O-O Nc7 11. e4 Re8 12. a4 a6 {LiveBook: 3 Games} 13. f3 {[#]} Bd7 $146 ({Predecessor:} 13... Rb8 14. a5 Bd7 {0-1 (27) Granda Zuniga,J (2646)-Lopez Martinez,J (2508) Ayamonte 2006}) 14. Nc4 Bxa4 {[%mdl 64] [#] Remove Defender, Decoy} 15. Nxa4 {Strongly threatening Nab6.} b5 16. Na5 ({Better is} 16. Nab6 Rb8 17. Bf4) 16... bxa4 $16 17. Nc6 (17. Qxa4 $6 Nfxd5 18. Rd1 Qe7 $15) 17... Qd7 18. Rxa4 Nb5 19. Qb3 (19. Be3 $16) 19... Nd4 ({Black should try} 19... Nxd5 $1 $14 20. Bxb5 (20. Qxd5 Nc7 $11) 20... Nb4) 20. Nxd4 cxd4 21. Rxa6 ({Wrong is} 21. Rxd4 $2 Qa7 $19) 21... Rxa6 22. Bxa6 Qa7 {White must now prevent ...d3+.} 23. Qb7 Ra8 24. Qxa7 Rxa7 25. Bb5 Nd7 26. Bxd7 Rxd7 {[%mdl 4096] Endgame KRB-KRB} 27. Bf4 Be5 28. Bxe5 dxe5 {KR-KR} 29. b4 Rb7 30. Rb1 Kf8 31. Kf2 Ke7 32. Ke2 Kd6 33. Kd3 Kc7 (33... f6 $16 {was worth a try.}) 34. f4 $1 $18 {[%cal Rf4e5]} f6 35. Rc1+ Kd7 36. Rc6 Rxb4 37. Rxf6 Rb3+ 38. Kc2 Rc3+ 39. Kd2 exf4 40. e5 {[%cal Be4e5,Be5e6][%mdl 32]} Re3 41. Rf7+ {[%mdl 64] [#] Double Attack} Ke8 42. e6 ({Weaker is} 42. Rxh7 Rxe5 43. Kd3 Rxd5 $11) 42... Re5 $2 (42... g5 43. Rxh7 g4) 43. Rd7 Rg5 44. Kd3 Rxg2 45. d6 {White mates.} Ra2 46. Rxh7 {[%cal Rh7h8]} Ra3+ 47. Kc4 {[%cal Rh7h8]} Ra4+ 48. Kb3 {Accuracy: White = 75%, Black = 40%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "2"]
[White "Cruz, Cristhian"]
[Black "Castillo Bernal, Hernan"]
[Result "1-0"]
[ECO "A41"]
[WhiteElo "2564"]
[BlackElo "1970"]
[Annotator "TA"]
[PlyCount "42"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,42,58,52,78,68,74,74,97,88,107,102,99,87,113,64,103,85,96,84,180,187,193,197,170,164,154,170,1410]} 1. d4 d6 2. Nf3 g6 3. g3 Bg7 4. Bg2 Nf6 (4... Bd7 5. O-O Qc8 6. c4 Nc6 7. Nc3 Bh3 8. e3 h5 9. Ne4 h4 10. Nxh4 Bf6 11. Nxf6+ Nxf6 12. f4 Bxg2 13. Kxg2 {0-1 (33) Hou,Y (2658)-Nakamura,H (2777) chess.com INT 2018}) 5. b3 Nbd7 6. Bb2 {A41: 1 d4 d6: Tartakower System and Modern Defence} c5 7. O-O cxd4 8. Nxd4 O-O 9. c4 {LiveBook: 15 Games} Nb6 10. Nc3 a6 $146 ({Predecessor:} 10... e6 11. Ndb5 Ne8 12. c5 a6 13. Nxd6 Nxd6 14. Qxd6 Qxd6 15. cxd6 Be5 16. Na4 Bxb2 17. Nxb2 {1-0 (44) McCorry,R (2050)-Griffiths,H (1792) England 2015}) 11. Qd2 Qc7 12. Rac1 e5 13. Nc2 {[%cal Bd4c2,Bc2b4,Bb4d3][%mdl 32]} Be6 14. e4 Rfd8 15. Nb4 Qd7 16. Rfd1 a5 17. Nd3 Bg4 (17... a4 $16) 18. f3 $18 {White is clearly better.} Be6 19. Qe3 Qc6 20. Nd5 Bxd5 21. cxd5 Nc8 $2 {Accuracy: White = 43%, Black = 30%.} (21... Qb5 22. Bf1 Nc8) 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "2"]
[White "Montero Martinez, Cristhian"]
[Black "Granda Zuniga, Julio E"]
[Result "0-1"]
[ECO "B24"]
[WhiteElo "2104"]
[BlackElo "2641"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,54,-20,-19,-31,-18,-21,-12,-210,-225,-226,-220,-263,-271,-264,-266,-344,-343,-312,-339,-322,-320,-316,-318,-312,-310,-318,-309,-304,-315,-357,-340,-435,-427,-525,-391,-386,-370,-456,-452,-434,-390,-635,-635,-735,-729]} 1. e4 c5 2. Nc3 e6 3. g3 Nc6 4. Bg2 g6 5. d3 Bg7 6. Nh3 Nge7 {LiveBook: 20 Games} 7. Be3 {B24: Closed Sicilian: 3 g3 sidelines} b6 8. Qd2 h6 {Threatens to win with ...d5.} 9. O-O $2 (9. Nf4 $11 {and White stays safe.}) 9... d5 $19 10. exd5 exd5 11. Rfe1 $146 ({Predecessor:} 11. Nf4 d4 12. Ncd5 dxe3 13. Qxe3 Rb8 {1-0 (58) Rodriguez Vila,A (2502)-Matsuura,E (2473) Santos 2006}) 11... Bxh3 12. Bxh3 d4 {[%mdl 64] [#] Double Attack} 13. Bf4 {Strongly threatening Nb5.} dxc3 14. bxc3 g5 15. Be3 O-O 16. Bg2 Nd5 17. d4 cxd4 18. cxd4 Rc8 {[%cal Ba8c8,Bc8c3,Bc3e3,Be3e2][%mdl 32]} 19. Rac1 Na5 {[%cal Bc6a5,Ba5c4,Bc4d2][%mdl 32]} 20. Qd3 Rc3 21. Qf5 Nxe3 22. fxe3 Qc8 23. Qf2 Nc4 24. Kh1 {[#]} Rxe3 $1 {[%mdl 512]} 25. c3 (25. Rxe3 Bxd4) 25... Qe6 26. Rf1 $2 (26. Rxe3 Qxe3 27. Qxe3 Nxe3 28. Re1 Nxg2 29. Kxg2) 26... Re2 27. Qf3 Nd2 {Accuracy: White = 39%, Black = 84%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "2"]
[White "Gomez Barrera, Javiera Belen"]
[Black "Flores, Diego"]
[Result "0-1"]
[ECO "B40"]
[WhiteElo "2084"]
[BlackElo "2609"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,76,7,25,27,9,-7,2,-17,-3,-4,0,-26,-29,-56,-71,-56,-25,-59,-58,-64,-60,-70,-62,-63,-53,-53,-50,-111,-99,-107,-79,-106,-94,-118,-120,-131,-93,-197,-178,-183,-187,-372,-454,-391,-412,-422,-390,-410,-404,-460,-439,-433,-431,-408,-445,-442,-458,-453,-437,-454,-447,-486,-472,-485,-441]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. Nc3 Ne7 7. Bc4 {B40: Sicilian: 2...e6, Unusual lines} (7. Bd3 O-O 8. O-O Nbc6 9. Bg5 h6 10. Bh4 Ne5 11. Kh1 N5g6 12. Bg3 f5 13. exf5 Nxf5 14. Qe2 d5 15. Rad1 Qg5 16. Bxf5 Qxf5 {½-½ (57) Kasimdzhanov,R (2704)-Fedoseev,V (2659) Berlin 2015}) 7... O-O {LiveBook: 4 Games} 8. O-O f5 9. Bd3 {The position is equal.} Nbc6 10. Bg5 h6 $146 ({Predecessor:} 10... fxe4 11. Nxe4 d5 12. Ng3 Qe8 13. Kh1 Rxf2 14. Rxf2 Bxf2 15. Qf3 Bxg3 16. Qxg3 {½-½ (38) Rieksen,R (1709)-Van Praet,R (1915) Twente 2007}) 11. Bxe7 Nxe7 12. Qh5 fxe4 13. Bxe4 d5 14. Bd3 Qd6 15. Rae1 Bd7 16. Qe5 Qxe5 17. Rxe5 Rac8 18. Re2 a6 $36 {[%mdl 2048] Black has some pressure.} 19. Kh1 g5 20. Nd2 (20. f3 $15) 20... Nc6 $17 {[%cal Be7c6,Bc6b4,Bb4d3][%mdl 32]} 21. Nb3 {With the idea Na4.} Ba7 22. f3 Kg7 23. Rfe1 Rf6 24. Nb1 Nb4 25. a3 (25. Nc1 $17) 25... Nxd3 $19 26. cxd3 Ba4 27. Rc1 $2 {[#]} (27. Nc1) 27... Rff8 28. N1d2 Rxc1+ 29. Nxc1 Rc8 30. Ndb3 Kf6 31. g3 {[#]} a5 $1 {[%cal Ba6a5,Ba5a4][%mdl 544]} 32. Kg2 (32. Nxa5 Rxc1+) 32... Bb5 33. Re1 Rc2+ 34. Re2 {Black is clearly winning.} Rc7 35. Re1 a4 36. Na1 Ba6 37. Na2 Bxd3 38. Nb4 Bg6 {Accuracy: White = 40%, Black = 91%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.05"]
[Round "2"]
[White "Alvarez Vargas, German"]
[Black "Pichot, Alan"]
[Result "0-1"]
[ECO "A34"]
[WhiteElo "2009"]
[BlackElo "2581"]
[Annotator "ChessBase"]
[PlyCount "64"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. Nf3 {[%emt 0:00:00]} c5 {[%emt 0:00:06]} 2. e3 {[%emt 0:02:02]} g6 {[%emt 0:02:10]} 3. c4 {[%emt 0:03:08]} Bg7 {[%emt 0:01:26]} 4. Nc3 {[%emt 0:02:11]} Nf6 {[%emt 0:00:24]} 5. g3 {[%emt 0:00:25]} d5 {[%emt 0:03:48]} 6. Bg2 {[%emt 0:04:13]} d4 {[%emt 0:01:05]} 7. exd4 {[%emt 0:07:45]} cxd4 {[%emt 0:00:14]} 8. Ne2 {[%emt 0:00:10]} Nc6 {[%emt 0:00:55]} 9. d3 {[%emt 0:00:29]} O-O {[%emt 0:00:34]} 10. O-O {[%emt 0:02:12]} Nd7 {[%emt 0:02:24]} 11. Ne1 {[%emt 0:09:39]} Nc5 {[%emt 0:01:12]} 12. b3 {[%emt 0:04:05]} Bf5 {[%emt 0:03:00]} 13. Ba3 {[%emt 0:09:53]} Qa5 {[%emt 0:01:00]} 14. Bxc5 {[%emt 0:00:10]} Qxc5 {[%emt 0:00:06]} 15. a3 {[%emt 0:02:28]} a5 {[%emt 0:01:50]} 16. Nf3 {[%emt 0:01:42]} b5 {[%emt 0:04:03]} 17. Nh4 {[%emt 0:11:15]} Bd7 {[%emt 0:01:50]} 18. Rc1 {[%emt 0:09:09]} Rfc8 {[%emt 0:02:05]} 19. Ra1 {[%emt 0:13:52]} bxc4 {[%emt 0:02:13]} 20. bxc4 {[%emt 0:00:21]} Rab8 {[%emt 0:00:46]} 21. Qc2 {[%emt 0:01:15]} Qh5 {[%emt 0:11:16]} 22. Nf3 {[%emt 0:04:55]} g5 {[%emt 0:01:09]} 23. h3 {[%emt 0:03:03]} Qg6 {[%emt 0:04:20]} 24. Nd2 {[%emt 0:02:03]} Qh6 {[%emt 0:04:11]} 25. Ne4 {[%emt 0:03:47]} Ne5 {[%emt 0:04:28]} 26. Qd2 {[%emt 0:01:43]} Bxh3 {[%emt 0:01:21]} 27. Qxg5 {[%emt 0:00:25]} Qxg5 {[%emt 0:00:31]} 28. Nxg5 {[%emt 0:00:02]} Bxg2 {[%emt 0:00:23]} 29. Kxg2 {[%emt 0:00:08]} Nxd3 {[%emt 0:00:09]} 30. Rad1 {[%emt 0:01:10]} Nb2 {[%emt 0:01:03]} 31. Rc1 {[%emt 0:01:19]} d3 {[%emt 0:00:21]} 32. Nf4 {[%emt 0:00:27]} d2 {[%emt 0:00:14]} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "3"]
[White "Granda Zuniga, Julio E"]
[Black "Henriquez Villagra, Cristobal"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "2641"]
[BlackElo "2488"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,89,15,12,20,29,22,26,12,22,22,21,25,17,18,27,18,24,21,38,14,26,16,16,20,38,21,27,17,27,21,23,21,25,16,30,8,17,19,47,27,29,31,32,24,69,72,44,42,54,0,0,0,-4,-21,0,-311,-343,-334,-163,-296,-95,-45,-48,-533,-525,-522,-138,-166,-162,-992,-867,-29991,-29992,-29998,-29999,-29999]} 1. c4 e6 2. Nc3 d5 3. cxd5 exd5 4. d4 c6 5. Bf4 Bd6 6. Bxd6 Qxd6 7. e3 Bf5 8. g4 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6} (8. Nf3 Nf6 9. Nh4 Bg6 10. Qb3 b5 11. Rc1 O-O 12. Be2 Nbd7 13. O-O Rfc8 14. Nxg6 hxg6 15. Rfd1 Nf8 16. Rd2 Ne6 17. Qd1 Rc7 18. Rdc2 Rac8 19. Bg4 Nxg4 20. Qxg4 g5 21. Qf5 Qe7 22. h3 g6 23. Qe5 {½-½ (23) Weber,J (2569)-Lafarga Santorroman,D (2659) ICCF email 2012}) 8... Bg6 {LiveBook: 3 Games} 9. Nge2 $146 ({Predecessor:} 9. h4 h5 10. g5 Ne7 11. Nh3 Nd7 12. Nf4 O-O-O 13. Be2 Kb8 14. Qb3 Nf8 15. O-O-O Ne6 16. Nxg6 fxg6 {0-1 (27) Geivondian,A (2399)-Geller,J (2488) Moscow 2016}) 9... Nf6 10. f3 {White has an edge.} Nbd7 11. Nf4 O-O-O 12. Qd2 Nf8 13. h4 {Threatens to win with h5.} h6 14. O-O-O Kb8 15. Nxg6 Nxg6 16. Bd3 Nf8 17. Bc2 Ne6 18. Kb1 Rhe8 19. Qf2 Ka8 20. Rhe1 Re7 21. Qg1 g6 {[%cal Bg7g6,Bg6g5][%mdl 32]} 22. Bb3 Ne8 23. e4 N8c7 24. e5 Qb4 25. Qe3 g5 26. Ne2 Red7 27. Bc2 c5 28. Bf5 b6 29. f4 {[%cal Rf4g5]} gxf4 30. Nxf4 cxd4 31. Qc1 Kb7 32. Nh5 ({White should try} 32. Rf1 $14) 32... Nb5 $11 {White must now prevent ...Nc3+.} 33. Ka1 Rc7 34. Qxh6 Rdc8 {aiming for ...d3!} 35. Rc1 $2 {[%mdl 8192] [#]} ({Reject} 35. Bxe6 fxe6 36. Qxe6 Qc4 $19) (35. Nf4 $1 $11 Nc3 36. Nd3 (36. bxc3 Qxc3+ 37. Kb1 Rc5 $11) (36. Nxe6 Nxd1 37. Rxd1 fxe6 $11)) 35... d3 $1 $19 {[%mdl 512]} 36. Bxd3 {[#]} Nbd4 (36... Nf4 $142 $1 {[%mdl 512]} 37. Qxf4 (37. Nxf4 Rxc1+) 37... Rxc1+ 38. Rxc1 Qxf4 39. Nxf4 Rxc1+ 40. Bb1 Nd4) 37. Kb1 {[#]} Nc5 $2 $40 {[%mdl 128] Black wants a kill.} (37... Rc2 $1 $19 {[%mdl 512] has better winning chances.} 38. Bxc2 (38. Rxc2 Rxc2) 38... Rxc2 39. Rxc2 Qxe1+ {[%mdl 64] Double Attack} 40. Rc1 Qe4+ {[%mdl 64] Double Attack} 41. Ka1 Nc2+ 42. Rxc2 {[%mdl 64] Remove Defender} Qxc2) 38. a3 $17 Qa5 39. Bf5 $2 {[%mdl 8192]} (39. Qe3 $15 Nxd3 {[%mdl 64] Discovered Attack} 40. Qxd3 Rxc1+ 41. Rxc1 Rxc1+ 42. Kxc1 Qe1+ {[%mdl 64] Double Attack} 43. Qd1 Nb3+ 44. Kc2 Na1+ 45. Kc1 Nb3+ 46. Kc2 Na1+ 47. Kc1 Nb3+) 39... Nxf5 $19 40. gxf5 Nb3 $2 (40... Nd3 $19 41. Rxc7+ Rxc7) 41. Rxc7+ $17 Rxc7 42. Rd1 $2 {[#]} (42. Qe3 d4 43. Qe4+ Rc6 44. Ka2) 42... Qc5 $1 $19 {[%cal Rc5c2] ( -> ...Qc2+)} 43. Ka2 Qc4 {Black mates.} 44. Qf4 Nc1+ {[%mdl 64] Discovered Attack (Double check)} 45. Ka1 Qa2# {Accuracy: White = 50%, Black = 47%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "3"]
[White "Flores, Diego"]
[Black "Acosta, Pablo Ismael"]
[Result "0-1"]
[ECO "A25"]
[WhiteElo "2609"]
[BlackElo "2463"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,58,33,16,21,14,33,32,26,1,0,0,0,0,0,-26,-20,-38,0,-39,-32,-39,-17,-526,-520,-512,-506,-493,-496,-533,-522,-644,-661,-635,-658,-646,-654,-735,-726,-855,-707,-719,-679]} 1. c4 e5 2. Nc3 d6 3. Nf3 Nc6 4. e3 g6 5. d4 Bg7 6. Be2 Nf6 7. dxe5 Nxe5 8. Nxe5 dxe5 9. Qxd8+ Kxd8 10. b3 {LiveBook: 18 Games. A25: English Opening vs King's Indian with ...Nc6 but without early d3} (10. e4 Be6 11. Be3 Kc8 12. O-O c6 13. h3 h5 14. Rad1 Bh6 15. Bxh6 Rxh6 16. h4 Kc7 17. g3 Rhh8 {½-½ (39) Le,Q (2728)-Duda,J (2737) Danzhou 2018}) 10... Be6 11. Ba3 Nd7 $146 ({Predecessor:} 11... Kc8 12. h3 Rd8 13. g4 Bf8 14. Bxf8 Rxf8 15. g5 Nd7 16. Bg4 Nc5 17. Ke2 a5 {½-½ (52) Kostenko,P (2435)-Makhnev,D (2409) Almaty 2018}) 12. O-O-O {White is slightly better.} f5 13. h3 Bf8 14. Bb2 c6 15. g4 Kc7 16. Rhg1 Be7 17. gxf5 gxf5 18. e4 Rhg8 19. exf5 Bxf5 {...Bg5+ is the strong threat.} 20. Bg4 $2 {[%mdl 8192]} (20. Rxg8 $11 {and White stays safe.} Rxg8 21. Bd3) 20... Bg5+ $19 {Black is clearly winning.} 21. Rd2 Bxd2+ 22. Kxd2 {[#]} h5 $1 23. Bxf5 {Hoping for Rg6.} (23. Bxh5 Rxg1) 23... Rxg1 24. Ne4 Rf8 25. Bxd7 Kxd7 26. Bxe5 Rh1 27. Ke3 Rxh3+ 28. Kd4 Rh4 29. f4 Rhxf4 {Accuracy: White = 23%, Black = 75%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.06"]
[Round "3"]
[White "Pichot, Alan"]
[Black "Lopez Silva, Hugo"]
[Result "1-0"]
[ECO "B39"]
[WhiteElo "2581"]
[BlackElo "2399"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 34,63,72,70,72,81,86,87,95,93,93,72,95,75,97,80,157,159,163,168,146,140,140,129,234,231,419,409,592,572,622,601]} 1. Nf3 Nf6 2. c4 c5 3. Nc3 g6 4. d4 cxd4 5. Nxd4 Nc6 6. e4 d6 7. f3 Nxd4 8. Qxd4 Bg7 9. Be3 O-O 10. Qd2 Be6 11. Rc1 a5 12. b3 Nd7 13. Be2 Nc5 14. O-O Qb6 {B39: Sicilian: Maroczy Bind with 5...Bg7 and 7...Ng4} 15. Nd5 Bxd5 16. cxd5 Qb4 17. Rc2 Qxd2 18. Bxd2 {[#] LiveBook: 3 Games} Bd4+ $146 ({Predecessor:} 18... f5 19. exf5 Rxf5 20. Bc4 Bd4+ 21. Kh1 Kg7 22. Re1 Be5 {½-½ (69) Milliet,S (2369)-Vakhidov,J (2554) Telford 2016}) 19. Kh1 f5 20. exf5 Rxf5 21. Rd1 Bg7 22. Be3 Re5 23. Bf2 Rf5 24. g3 b5 (24... Rff8 $142) 25. Bxb5 $16 Rxf3 26. Bxc5 dxc5 {[#]} 27. d6 $1 {[%cal Bd5d6,Bd6d7][%mdl 32]} Rd8 28. Kg2 $36 {[%mdl 2048] Black is under strong pressure.} ({Of course not} 28. dxe7 $6 Rxd1+ 29. Kg2 Re3 $11) 28... Re3 (28... Rff8 $16 {was necessary.}) 29. d7 $18 Kf7 $2 (29... Re5 {keeps fighting.} 30. Rdc1 Kf8 31. Rxc5 Rxc5 32. Rxc5 e6) 30. Rxc5 e6 (30... Rc3 $142) 31. Rc8 Ke7 32. Rdc1 {Accuracy: White = 94%, Black = 36%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.06"]
[Round "3"]
[White "Martinez Alcantara, Jose Eduardo"]
[Black "Delgado Ramirez, Neuris"]
[Result "1-0"]
[ECO "B32"]
[WhiteElo "2541"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,67,24,18,62,35,51,7,46,45,44,31,52,12,33,25,65,38,72,72,63,85,72,62,89,34,70,86,203,191,174,132,205,198,322,325,333,332,333,335,332,333,329,296,588,584,567,544,2310,2229]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 a6 6. Nd6+ Bxd6 7. Qxd6 Qe7 8. Qd1 Nf6 9. Nc3 d6 10. Be3 {B32: Sicilian: Löwenthal and Kalashnikov Variations} (10. Bg5 Be6 11. Nd5 Bxd5 12. exd5 Nb8 13. Qf3 Nbd7 14. O-O-O h6 15. Be3 h5 16. h3 O-O-O 17. Ba7 Nc5 {1-0 (80) Yu,Y (2759)-Li,C (2725) Ningbo 2018}) 10... Be6 11. Be2 {LiveBook: 6 Games} h6 12. O-O {White is slightly better.} Qc7 13. Qd2 $146 ({Predecessor:} 13. f4 exf4 14. Bxf4 Rd8 15. Qd3 Qb6+ 16. Kh1 Ne7 17. Rad1 Qxb2 18. Bxd6 Rxd6 19. Qxd6 {1-0 (39) Baghdasaryan,V (2414)-Harutjunyan,G (2458) Yerevan 2013}) 13... Ne7 14. f4 Rd8 15. Rad1 Rd7 16. Bf3 Bg4 17. Qf2 {Hoping for fxe5.} (17. Qe2 {with more complications.} Be6 18. Qf2 O-O 19. h3 exf4 20. Bxf4 Ng6 21. Be3) 17... Bxf3 18. Qxf3 Ng6 19. fxe5 dxe5 20. Rxd7 Qxd7 21. h3 Qc7 22. Kh1 (22. a3 $16) 22... b5 23. a3 Nh4 {[#]} (23... Kf8 $16) 24. Qf2 $1 $18 {[%cal Rf2h4]} Ng6 25. Bc5 {[%cal Be3c5,Bc5d6,Bd6e5,Be5g7][%mdl 32]} Nf4 (25... Ne7 $16 {was called for.}) 26. Rd1 Ne6 (26... Nd7 $142) 27. Bd6 Qb7 28. Bxe5 Nxe4 29. Nxe4 Qxe4 {[#]} 30. Bxg7 $1 {[%mdl 512]} Rg8 (30... Nxg7 31. Re1) 31. Re1 Qg6 $2 (31... Qc6 {is a better defense.}) 32. Bf6 {Strongly threatening g4.White is clearly winning.} Qg3 33. Qd2 {[%csl Gf6][%cal Rd2d8]} Qc7 34. Qd5 {Accuracy: White = 66%, Black = 24%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "3"]
[White "Vera Siguenas, Deivy"]
[Black "Bacallao Alonso, Yusnel"]
[Result "0-1"]
[ECO "C56"]
[WhiteElo "2483"]
[BlackElo "2583"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,76,-17,-7,-5,-6,0,0,-6,6,0,0,0,0,-10,-8,-10,-11,-56,-62,-47,-51,-112,-124,-106,-129,-221,-102,-97,-108,-100,-114,-113,-138,-126,-108,-198,-198,-199,-199,-215,-228,-291,-276,-267,-280,-261,-271,-440,-421,-441,-479,-480,-485,-480,-472,-465,-459,-593,-602,-455,-230,-693,-660]} 1. e4 e5 {[%cal Be7e5,Be5d4][%mdl 32]} 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 Ng4 6. O-O Be7 {C56: Two Knights: 4 d4 exd4 5 0-0 Nxe4} 7. Bf4 (7. Re1 d6 8. exd6 Qxd6 9. b3 O-O 10. Ba3 Qd8 11. Bxe7 Nxe7 12. Qxd4 Qxd4 13. Nxd4 Nf5 14. Nxf5 Bxf5 {½-½ (108) Mamedov,R (2708)-Inarkiev,E (2684) Ankara 2018}) 7... f6 8. exf6 Nxf6 {LiveBook: 3 Games. The position is equal.} 9. Nxd4 Nxd4 10. Qxd4 d5 11. Bb3 O-O 12. Re1 $146 ({Predecessor:} 12. Nc3 c6 13. Rfe1 Bd6 14. Bxd6 Qxd6 {0-1 (40) Selezneva,E (1700)-Lokander,M (2369) St Petersburg 2015}) 12... c6 {[%cal Bc7c6,Bc6c5][%mdl 32]} 13. c4 Bb4 14. Bd2 c5 15. Qh4 {aiming for cxd5.} Qa5 16. Bxb4 Qxb4 {[%cal Rb4e1]} 17. Na3 Bf5 $40 {[%mdl 128] White needs to defend precisely.} 18. Qg3 (18. f3 $15) 18... d4 $1 $17 19. f3 Bg6 20. Rad1 {[#]} (20. Nb5 $17) 20... Rae8 (20... d3 $1 $19 {is more deadly. Threatens to win with ...a5.} 21. Re7 a5 22. Rxd3 Nh5) 21. Nb5 a5 {And now ...a4 would win.} 22. Nc7 a4 23. Nxe8 Nxe8 24. Bxa4 Qxa4 25. b3 (25. Qe5 $17) 25... Qxa2 $19 26. Qe5 Qxb3 27. Qxc5 d3 28. Qd5+ Kh8 29. Qc5 {[%cal Rc5f8] [#]} Rg8 $1 30. Qd4 Nf6 31. Rd2 $2 (31. h3 {was called for.}) 31... Qb4 32. Qb2 Qxc4 33. Qxb7 Qd4+ 34. Kh1 h6 35. Qb2 Qf4 36. Rdd1 Rc8 37. Qe5 Qh4 (37... Qc4 $142 38. Rg1 Kh7) 38. Kg1 $2 (38. Qg3 Qxg3 39. hxg3) 38... Rc2 {Accuracy: White = 40%, Black = 80%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "3"]
[White "Abarca Gonzalez, Nicolas"]
[Black "Cruz, Cristhian"]
[Result "0-1"]
[ECO "B47"]
[WhiteElo "2416"]
[BlackElo "2564"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,96,5,15,37,35,44,50,52,39,49,49,65,13,23,7,6,10,21,0,10,0,0,-20,-16,-16,-19,-34,-33,-20,-8,-10,-13,-16,0,0,0,-19,-20,-19,0,-29,-9,-11,-18,-65,-79,-60,-62,-109,-87,-252,-252,-570,-519,-1164,-1121,-1375,-1369,-1315,-1119,-29976,-29977,-6299,-6299,-5222,-2314,-29991,-29990,-29998,-29995,-29995,-29996,-29996,-29996]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. g3 Be7 7. Bg2 a6 8. O-O Bd7 9. Re1 Qc7 10. a4 Nc6 11. Nxc6 Bxc6 12. Bf4 {B47: Sicilian: Taimanov: 5 Nc3 Qc7 6 f4, 6 g3 and 6 Be2} O-O 13. a5 {[#] LiveBook: 9 Games} b5 $146 ({Predecessor:} 13... Rac8 14. Qe2 Nd7 15. Nd5 Bxd5 16. exd5 e5 17. Bd2 f5 18. Rac1 Bf6 19. Bh3 Be7 20. Kh1 Rce8 {1-0 (39) Khismatullin,D (2568)-Alekseev,E (2644) Tomsk 2006}) 14. axb6 $1 {White is slightly better.} Qxb6 15. Nd5 Bxd5 16. exd5 e5 17. Bc1 Nd7 18. b3 (18. Re3 $14) 18... f5 $11 19. Be3 Qb7 20. Ra4 {[%cal Ba1a4,Ba4c4,Bc4c6][%mdl 32]} Bf6 21. Rc4 e4 22. Rc6 Be5 $1 23. f4 exf3 $1 24. Qxf3 a5 25. Bf1 a4 26. bxa4 Rxa4 27. Bd3 g6 28. Bh6 Rf7 29. Kg2 Ra8 30. Bf4 Rd8 31. Bc4 Qb8 32. h4 Bxf4 33. Qxf4 Ne5 {[%cal Bd7e5,Be5g4,Bg4e3][%mdl 32]} 34. h5 Re8 $1 35. hxg6 hxg6 36. Qg5 Kg7 37. Rh1 $2 {[#]} (37. Qe3 $17) 37... Ng4 $1 $19 38. Qf4 $2 (38. Qd2 {is tougher.} Qb2 39. Re1 Rxe1 40. Qxe1) 38... Re4 39. Qc1 (39. Qxd6 $142 Qxd6 40. Rxd6 Rxc4 41. Rc6) 39... Ne3+ {[%mdl 64] Double Attack} 40. Kf3 Nxc4 41. Qh6+ Kf6 42. Rh5 Ne5+ 43. Kg2 Re2+ 44. Kf1 {[#]} Rf2+ $1 {[%mdl 512]} 45. Ke1 (45. Kxf2 Ng4+) 45... Qb4+ {Black mates.} 46. c3 Qe4+ 47. Kxf2 Ng4+ {[%mdl 64] Double Attack} 48. Kf1 Qf3+ {Accuracy: White = 41%, Black = 78%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "4"]
[White "Bacallao Alonso, Yusnel"]
[Black "Martinez Alcantara, Jose Eduardo"]
[Result "0-1"]
[ECO "A46"]
[WhiteElo "2583"]
[BlackElo "2541"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,78,4,0,-2,9,8,20,5,16,-2,26,-16,0,-15,-9,-10,-1,-8,14,0,7,0,9,-14,-9,-25,-13,-16,-12,-11,-6,-10,-10,-77,-83,-80,-78,-76,-71,-70,-93,-119,-97,-193,-191,-244,-211,-252,-167,-155,-162,-193,-187,-183,-168,-166,-161,-162,-163,-205,-158,-163,-171,-191,-184,-257,-254,-257,-175,-223,-224]} 1. d4 Nf6 2. Nf3 e6 3. g3 b5 4. Bg5 (4. e3 b4 5. Bg2 Bb7 6. O-O c5 7. a3 a5 8. Nbd2 Na6 9. c4 bxc3 10. bxc3 Be7 11. Rb1 Bc6 {1-0 (77) Yu,Y (2750)-Jumabayev,R (2602) Ashkhabad 2017}) 4... Bb7 5. e3 a6 $146 ({Predecessor:} 5... c5 6. Nbd2 c4 7. Bg2 d5 8. Ne5 h6 9. Bxf6 gxf6 10. Nef3 Nd7 11. c3 Qc7 {½-½ (68) Garcia Palermo,C (2450)-Petkov,V (2477) Gallipoli 2017}) 6. Bg2 {A46: 1 d4 Nf6 2 Nf3 e6: Torre, London and Colle Systems} d5 7. a4 Nbd7 8. O-O {The position is equal.} Be7 9. Qe2 O-O 10. Nbd2 b4 11. c4 bxc3 12. bxc3 a5 13. Rfc1 Ba6 14. Qd1 c5 15. c4 Rc8 16. Bxf6 Nxf6 {[%cal Bd7f6,Bf6d5,Bd5c3][%mdl 32]} 17. Bf1 cxd4 18. Nxd4 Bb4 19. cxd5 Bxf1 20. Rxc8 Qxc8 21. Kxf1 (21. Rc1 $1 $11 {remains equal.} Qa8 22. Nxf1 Nxd5 23. Rc4) 21... Nxd5 $17 22. N2f3 Nc3 $36 {[%mdl 2048] Black is really pushing.} 23. Qc2 Qb7 {Threatens to win with ...e5!} 24. Kg1 Rc8 25. Qd3 h6 26. Ne1 {[#]} (26. Qc2 $17 {is a better defense.}) 26... Nxa4 $1 $19 {[%mdl 512]} 27. Qb3 (27. Nec2 $142 Nc5 28. Qd1) (27. Rxa4 Rc1) 27... Nc5 28. Qb1 Bc3 29. Qxb7 Nxb7 30. Rc1 {And now Nb5 would win.} Nd6 31. Ne2 Bxe1 32. Rxe1 {[%mdl 4096] Endgame KRN-KRN} a4 33. Ra1 Rc4 34. Rd1 Nb7 35. Rd7 Rb4 36. Rd3 e5 37. Rc3 (37. Ra3 {was worth a try.}) 37... Nd6 38. Rc6 Ne4 {Hoping for ...a3.} 39. Nc3 {[#]} a3 $1 {Accuracy: White = 32%, Black = 78%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "4"]
[White "Cruz, Cristhian"]
[Black "Gasic Merino, Franco"]
[Result "1-0"]
[ECO "E90"]
[WhiteElo "2564"]
[BlackElo "2166"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,93,50,55,63,63,52,40,24,28,33,29,73,65,73,72,75,63,75,44,89,24,65,16,16,23,27,25,20,9,8,10,12,12,12,16,60,54,88,64,230,236,245,228,337,255,428,426,424,382,433,448,422,425,585,577,598,639,632,637,620,598,657,556,550,533,862,843,878,681,1150,1446,1838,1162]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. h3 e5 7. d5 Nh5 8. g3 {E90: King's Indian: Classical: Early deviations and 6 h3} f5 (8... Na6 9. Be2 Nc5 10. b4 Nd7 11. Rb1 a5 12. a3 axb4 13. axb4 Qe7 14. Bg5 f6 15. Be3 f5 16. exf5 {½-½ (68) Akobian,V (2647)-Guseinov,G (2646) Riadh 2017}) 9. exf5 gxf5 10. Nh4 Nf4 11. Be3 Na6 12. Qd2 {LiveBook: 4 Games} Bd7 $146 ({Predecessor:} 12... Nc5 13. gxf4 Qxh4 14. Rg1 Kh8 15. Rxg7 Kxg7 16. fxe5 {1-0 (35) Szabo,G (2546)-Giannoulakis,L (2355) Achaea 2017}) 13. O-O-O Nc5 14. Nxf5 Bxf5 15. gxf4 exf4 16. Bd4 Bg6 17. h4 {[%cal Bh3h4,Bh4h5][%mdl 32] Threatens to win with h5.} Bxd4 18. Qxd4 {Black must now prevent h5.} Qf6 19. h5 Bf5 20. Rg1+ Kh8 21. Qxf6+ Rxf6 22. b4 Nd7 $1 23. Rd4 Ne5 {...Nf3 is the strong threat.} 24. Rxf4 Raf8 25. Kd2 Bd7 $1 $132 {[%mdl 2048] Black is fighting back} 26. Rxf6 Rxf6 27. Be2 Rxf2 28. Ke3 Rf8 29. c5 Re8 {[#]} 30. Kd4 $1 Bf5 $2 (30... c6 $14) 31. cxd6 $18 cxd6 {[#]} 32. Rf1 $1 {[%cal Rf1f5]} Bc2 (32... Bh3 $142) 33. Rf6 Re7 $2 (33... Kg7 34. Rxd6 Bf5) 34. Rxd6 Kg7 35. h6+ Kf7 36. Bh5+ {White is clearly winning.} Ng6 37. Rd8 Kf6 38. d6 Rf7 39. Ne4+ Bxe4 40. Kxe4 {[%mdl 4096] Endgame KRB-KRN} Rf8 41. Rd7 Ke6 42. Bg4+ Kf6 {If Black can now play ...Ne5 this consolidates a bit.} 43. Rxb7 a5 44. b5 Kg5 45. Bh3 Rf4+ 46. Ke3 Rh4 47. Bf1 {Accuracy: White = 83%, Black = 43%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "4"]
[White "Perez Ponsa, Federico"]
[Black "Pichot, Alan"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2560"]
[BlackElo "2581"]
[Annotator "TA"]
[PlyCount "50"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,50,-21,-4,-30,-30,-30,-30,-38,-22,-48,-17,-47,-7,-20,7,3,14,10,11,10,31,23,28,40,32,30,26,26,37,31,37,12,6,8,22]} 1. d4 d5 2. Bf4 Nf6 3. e3 c6 4. Nf3 Qb6 5. Qc1 Nh5 6. Bg5 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} h6 7. Bh4 g5 8. Bg3 Nxg3 9. hxg3 Bg7 {LiveBook: 3 Games} 10. Bd3 c5 $146 ({Predecessor:} 10... Nd7 11. c3 e5 12. dxe5 Nxe5 13. Nxe5 Bxe5 {½-½ (53) Surjadnji,A (2420)-El Gindy,E (2485) Cairo 1998}) 11. c3 Nc6 12. Nbd2 {[%cal Bb1d2,Bd2b3,Bb3c5,Bc5d3][%mdl 32]} Bd7 13. Qc2 e6 (13... Rc8 $5 {[%cal Rc5d4]} 14. dxc5 Qxc5 $11) 14. Rd1 f5 15. Be2 $1 Bf6 16. Nb3 cxd4 17. exd4 O-O-O 18. Nc5 Kb8 19. Qb3 h5 20. Qxb6 axb6 21. Nd3 Rh7 22. Nfe5 Be8 23. Kd2 Kc7 24. Ke3 Kd6 {[%cal Rc6e5]} 25. f4 g4 {Precision: White = 67%, Black = 47%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "4"]
[White "Henriquez Villagra, Cristobal"]
[Black "Gonzalez Vidal, Yuri"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2488"]
[BlackElo "2562"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,69,0,0,-16,-14,-20,-16,-37,-37,-45,-25,-19,-22,-20,0,-25,0,0,0,0,0,0,0,0,0,0,0,0,0,0,37,0,0,0,0,0,23,22,54,25,19,22,17,18,20,21,25,18,10,0,35,35,29,33,35,-34]} 1. d4 Nf6 2. Nf3 e6 3. Bf4 d5 4. e3 Bd6 5. Bg3 O-O 6. Nbd2 b6 7. c3 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} c5 8. Ne5 Qc7 {LiveBook: 16 Games} 9. Bb5 {The position is equal.} Bb7 10. O-O $146 ({Predecessor:} 10. f4 Nc6 11. Bh4 Ne4 12. Nxe4 dxe4 13. O-O f6 14. Qg4 {1-0 (65) Andreikin,D (2736)-Zhou,W (2635) China 2016}) 10... Nc6 11. f4 Ne7 12. Bh4 {Black should prevent Bxf6.} Ne4 (12... a6 {is interesting.} 13. Be2 Nf5 14. Bf2 Be7 15. g4 Nd6) 13. Nxe4 dxe4 14. Bxe7 Bxe7 15. f5 exf5 16. Rxf5 {Threatening Qb3.} g6 17. Rxf7 $1 Rxf7 18. Bc4 {[%mdl 64] [#] Pin} Raf8 19. Nxf7 {Threatens to win with Nd8+.} Kg7 {...cxd4 is the strong threat.} 20. Ne5 Bd6 {aiming for ...cxd4.} 21. Qa4 Bxe5 22. dxe5 {[%cal Bd4e5,Be5e6][%mdl 32]} Bc6 23. Qa6 Bb7 $1 {[%cal Rb7a6]} 24. Qa3 a6 $1 25. Rd1 b5 26. e6 Rd8 27. Rf1 Rf8 28. Rxf8 Kxf8 29. Be2 Ke7 30. b4 cxb4 31. Qxb4+ Qd6 32. Qb2 Qe5 33. a4 {[%cal Ra4b5]} Bc6 34. axb5 Bxb5 35. Qd2 {Accuracy: White = 65%, Black = 77%.} (35. Qa3+ $14 Qd6 36. Qxd6+ Kxd6 37. c4) 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "4"]
[White "Henriquez Villagra, Cristobal"]
[Black "Gonzales Vidal, Yuri"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2488"]
[BlackElo "2562"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,69,-2,-3,-16,-15,-20,-18,-31,-30,-42,-20,-29,-25,-28,-14,-25,0,0,0,0,0,0,0,0,0,0,0,0,0,0,50,0,0,0,0,0,16,16,45,10,16,16,23,15,14,6,5,6,4,0,37,35,35,35,39,-68]} 1. d4 Nf6 2. Nf3 e6 3. Bf4 d5 4. e3 Bd6 5. Bg3 O-O 6. Nbd2 b6 7. c3 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} c5 8. Ne5 Qc7 {LiveBook: 16 Games} 9. Bb5 {The position is equal.} Bb7 10. O-O $146 ({Predecessor:} 10. f4 Nc6 11. Bh4 Ne4 12. Nxe4 dxe4 13. O-O f6 14. Qg4 {1-0 (65) Andreikin,D (2736)-Zhou,W (2635) China 2016}) 10... Nc6 11. f4 Ne7 12. Bh4 Ne4 13. Nxe4 dxe4 14. Bxe7 Bxe7 15. f5 exf5 16. Rxf5 {Threatening Qb3.} g6 17. Rxf7 $1 Rxf7 18. Bc4 {[%mdl 64] [#] Pin} Raf8 19. Nxf7 {Hoping for Nd8+.} Kg7 {White must now prevent ...cxd4.} 20. Ne5 Bd6 {And now ...cxd4 would win.} 21. Qa4 Bxe5 22. dxe5 {[%cal Bd4e5,Be5e6][%mdl 32]} Bc6 (22... a6 $5) 23. Qa6 Bb7 24. Qa3 a6 $1 25. Rd1 b5 26. e6 Rd8 27. Rf1 Rf8 28. Rxf8 Kxf8 29. Be2 Ke7 30. b4 cxb4 31. Qxb4+ Qd6 32. Qb2 Qe5 33. a4 {[%cal Ra4b5] White is slightly better.} Bc6 34. axb5 Bxb5 35. Qd2 {Accuracy: White = 71%, Black = 75%.} (35. Qb4+ $14 Qd6 36. Qxd6+ Kxd6 37. c4) 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "4"]
[White "Acosta, Pablo Ismael"]
[Black "Delgadillo, Adonay"]
[Result "1-0"]
[ECO "E72"]
[WhiteElo "2463"]
[BlackElo "2218"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,85,4,4,43,40,33,29,51,0,68,66,81,75,93,99,91,68,99,93,83,60,92,93,118,131,183,111,99,52,45,48,75,64,110,82,168,160,158,165,158,152,156,127,420,462,454,448,509,506,501,502,446,427,518,522,524,524,563,559,547,547,528,528,29985,29986,29986,29987,29987,751,751,729,700,695]} 1. c4 Nf6 2. g3 g6 3. Bg2 Bg7 4. Nc3 d6 5. e4 O-O 6. Nge2 c5 7. d4 cxd4 {E72: King's Indian: 4 e4 d6 5 g3} (7... Nc6 8. d5 Ne5 9. b3 Bg4 10. h3 Bf3 11. O-O e6 12. Bb2 exd5 13. exd5 Qd7 14. Qc2 Rfe8 15. Nf4 {0-1 (49) Moroni,L (2478)-Mogranzini,R (2514) Rome 2016}) 8. Nxd4 {LiveBook: 14 Games} Bg4 9. f3 $146 ({Predecessor:} 9. Nde2 Nc6 10. h3 Be6 11. b3 Qc8 12. Bb2 Rb8 13. Qd2 a6 14. Rc1 {½-½ (22) Ulaneo,R (2311)-Guerrero,A (2307) San Jose 2002}) 9... Bd7 {White is slightly better.} 10. Be3 Nc6 11. Nde2 (11. O-O $14) 11... Ne5 ({Black should try} 11... a6 $11) 12. b3 $14 Re8 13. O-O Qa5 14. h3 Nc6 15. Qd2 Rac8 16. g4 a6 17. a4 Qb4 18. Rab1 e6 19. Rfd1 d5 (19... Red8 $16) 20. g5 (20. f4 $18) 20... Nh5 $16 21. exd5 exd5 22. Nxd5 Qxd2 23. Rxd2 Be6 24. Kf2 b5 (24... Na5 $16) 25. axb5 axb5 26. cxb5 Bxd5 27. Rxd5 Nb4 28. Rd2 Bc3 $2 {[%mdl 8192] [#]} (28... Nc2 $16 {might work better.}) 29. Nxc3 $18 Rxc3 30. Bd4 Nd3+ 31. Kg1 Rc1+ 32. Rxc1 Nxc1 33. Ba7 Nf4 34. b6 Nxb3 35. Rb2 {[#] b7 is the strong threat.} Re1+ 36. Kh2 Nc5 37. b7 Nxb7 38. Rxb7 {Threatens to win with Rb8+.} Re2 39. Rb8+ Kg7 40. Bd4+ f6 41. Bxf6+ (41. gxf6+ $142 Kf7 42. Rb7+ Ke8 43. f7+ Kf8 44. Bc5+ Re7 45. Rxe7 Ne6 46. Bd6) 41... Kf7 42. Rb7+ Kf8 43. Rb2 {Accuracy: White = 79%, Black = 28%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "4"]
[White "Gomez Barrera, Javiera Belen"]
[Black "Granda Zuniga, Julio E"]
[Result "0-1"]
[ECO "B42"]
[WhiteElo "2084"]
[BlackElo "2641"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,80,6,22,22,27,27,45,47,49,55,43,23,48,25,25,10,3,16,27,0,-5,-2,0,0,0,0,0,-3,-9,-11,0,-17,-2,-25,-9,-23,0,0,0,-7,20,0,0,0,10,0,13,0,2,-77,-94,-89,-97,-97,-132,-123,-59,-135,-137,-136,-133,-181,-172]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O d6 7. Qe2 Be7 8. c4 O-O 9. Nc3 Nc6 {B42: Sicilian: Kan Variation: 5 Bd3} 10. Nf3 b6 {LiveBook: 4 Games} 11. Bd2 $146 ({Predecessor:} 11. Rd1 Qc7 12. Bf4 Ng4 13. Rac1 Nce5 14. b3 Bb7 15. h3 Nxf3+ 16. Qxf3 Ne5 17. Qg3 {0-1 (68) Lokesh,P (2241)-Babujian,L (2512) Kolkata 2013}) 11... Bb7 {The position is equal.} 12. Rac1 Ra7 13. Rfd1 Qb8 14. h3 Ba8 15. Bf4 Nd7 16. a3 Rc8 17. b4 Nce5 18. Nxe5 Nxe5 19. Be3 (19. c5 $5) 19... Rac7 {[%cal Re5c4]} 20. Na4 Rc6 21. b5 axb5 22. cxb5 Rxc1 23. Rxc1 Rxc1+ 24. Bxc1 g6 25. Be3 Nd7 26. Qb2 h5 27. Bd4 h4 28. Qc2 Bf8 29. Qc1 Be7 30. Qc2 Bd8 31. Qc1 Qb7 32. Qh6 {[%csl Gd4][%cal Rh6h8]} e5 $1 {[%cal Re5d4]} 33. Bb2 d5 {[%cal Bd6d5,Bd5d4][%mdl 32]} 34. Nc3 (34. exd5 $11 {keeps the balance.} Qxd5 35. Bf1) 34... Nc5 $17 35. Bb1 d4 36. Nd5 {Black should prevent Nf4.} Qd7 37. Ba2 {[#] Strongly threatening Nxb6!} Ne6 ({And not} 37... Qxb5 {[#]} 38. Ne7+ $1 {[%mdl 512]} Bxe7 39. Qxg6+ Kh8 40. Bxf7 Qf1+ 41. Kxf1 Nxe4 42. Qh6#) (37... Qd6 $1 $17 38. f3 Bxd5 39. Bxd5 Nd3) 38. Qc1 ({White should try} 38. Bc1 $1 $15) 38... Qxb5 {aiming for ...Qe2.Black is clearly better.} 39. Nb4 {Threatens to win with Bxe6.} Qd7 ({Inferior is} 39... Bxe4 40. Bxe6 fxe6 41. Qc8 $16) 40. Nd5 Bb7 {Precision: White = 38%, Black = 39%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "5"]
[White "Granda Zuniga, Julio E"]
[Black "Lopez Silva, Hugo"]
[Result "1-0"]
[ECO "A65"]
[WhiteElo "2641"]
[BlackElo "2399"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,70,26,16,20,39,44,16,31,35,18,99,26,39,23,24,0,0,0,0,-18,68,54,59,31,84,67,79,88,80,62,59,64,62,47,57,44,50,44,172,112,172,166,149,165,147,146,155,160,173,144,221,205,495]} 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. Bd3 Bg7 8. Nge2 O-O 9. O-O Re8 10. f3 Nbd7 {LiveBook: 4 Games. A65: Modern Benoni: 6 e4} 11. Ng3 (11. a4 a6 12. Bc2 b6 13. Bf4 Ne5 14. Qc1 Bd7 15. Bh6 Bh8 16. h3 b5 17. Ng3 bxa4 {½-½ (26) Zysk,R (2462)-Bromberger,S (2440) Germany 2004}) 11... Ne5 12. Be2 a6 {White is slightly better.} 13. a4 Rb8 14. h3 $146 ({Predecessor:} 14. Kh1 Bd7 15. Bg5 Qc8 16. f4 Neg4 17. f5 gxf5 {1-0 (65) Asefi,Z (2072)-Liu,Y (1883) Istanbul 2012}) 14... h5 (14... c4 $11 {keeps the balance.}) 15. Nh1 (15. f4 $1 $16 {[%cal Rf4e5]} Ned7 16. e5 dxe5 17. fxe5 Nxe5 18. Bg5) 15... Nh7 16. Nf2 f5 17. f4 Nf7 18. exf5 Bxf5 19. g4 hxg4 (19... Bd7 $11) 20. hxg4 $14 Bd7 21. Kg2 Bd4 (21... g5 $14) 22. g5 $16 Bf5 23. Bd3 Qd7 24. Nce4 Re7 25. Ng3 Bxd3 26. Qxd3 Nf8 27. Nfe4 Rbe8 $1 28. Ra3 b5 {[#]} ({Black should play} 28... Qg4 $14 29. Re1 Rc8) 29. axb5 (29. Qxd4 $1 $18 {[%mdl 512]} cxd4 30. Nf6+ Kh8 31. Nxd7 Nxd7 32. f5) 29... axb5 (29... Qxb5 $16 30. Qxb5 axb5) 30. Qxd4 $18 {White is clearly better.} cxd4 31. Nf6+ Kg7 32. Nxd7 Nxd7 {[#]} 33. Rd3 $1 Rc8 34. Rxd4 Nc5 (34... Nb6 $16) 35. f5 Ra7 $2 {Precision: White = 81%, Black = 29%.} (35... Rec7) 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "5"]
[White "Flores, Diego"]
[Black "Henriquez Villagra, Cristobal"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2609"]
[BlackElo "2488"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,59,19,-8,-10,0,-13,-4,28,36,38,31,64,52,58,41,33,33,41,37,68,36,107,107,181,126,136,148,249,259,250,251,238,259,357,314,429,404,790,651]} 1. c4 e6 2. Nf3 d5 3. b3 Nf6 4. Bb2 b6 5. g3 Be7 6. Bg2 O-O 7. O-O Bb7 8. e3 dxc4 9. bxc4 c5 10. Qe2 Nc6 11. Nc3 Rc8 {[%cal Ba8c8,Bc8c7,Bc7d7][%mdl 32]} 12. Ne1 {[%cal Bf3e1,Be1c2,Bc2e3][%mdl 32] LiveBook: 14 Games. A14: English Opening: 1...e6 with b3 by White} Rc7 (12... Qd7 13. f4 Rfd8 14. Rd1 Na5 15. Bxb7 Qxb7 16. d3 a6 17. a4 Ne8 18. f5 Bf6 19. fxe6 fxe6 {0-1 (49) Giri,A (2771)-So,W (2812) Stavanger 2017}) 13. f4 Rd7 14. d3 $146 {The position is equal.} ({Predecessor:} 14. Rd1 Qa8 15. d3 Rfd8 16. g4 Nb4 17. Rf2 Ne8 18. a3 Nc6 19. Nf3 Bf6 {1-0 (38) Dizdar,G (2380)-Kelecevic,N (2390) Vrbas 1982}) 14... Qa8 15. f5 exf5 16. Rxf5 Bd8 17. Nc2 Ne8 18. Raf1 Ne7 $1 {[#] And now ...Bxg2 would win.} 19. Bxb7 Qxb7 20. R5f2 {Strongly threatening e4.} Ng6 21. e4 (21. h4 {with more complications.} f6 22. Nd5 b5 23. Bc3 b4 24. Ba1) 21... Nc7 (21... Bc7 $14) 22. Ne3 $36 {[%mdl 2048] White is on the roll.} a6 {[#]} (22... f6 $16 23. Ncd5 Nxd5 24. cxd5 (24. Nxd5 Bc7 $14) 24... Re8) 23. Ncd5 (23. Nf5 $1 $18) 23... Nxd5 24. cxd5 Re8 (24... f6 $16 25. h4 Qb8) 25. h4 $18 {[%cal Bh2h4,Bh4h5,Bh5h6][%mdl 32]} Qc7 26. h5 Ne5 ({Reject} 26... Qxg3+ 27. Rg2 $18) 27. Ng4 f6 28. h6 Nxg4 29. Qxg4 c4 (29... Rf7 $142 30. Bxf6 Bxf6 31. Rxf6 Qd7 32. Qxd7 (32. Rxf7 Qxg4 33. Rxg7+ Qxg7 $18) 32... Rxd7) 30. Bxf6 {Accuracy: White = 73%, Black = 34%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "5"]
[White "Pichot, Alan"]
[Black "Cruz, Cristhian"]
[Result "1/2-1/2"]
[ECO "C55"]
[WhiteElo "2581"]
[BlackElo "2564"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,70,36,41,19,20,0,21,-51,-37,-31,-28,-10,0,-14,-11,0,-8,-13,0,-21,-25,-23,-18,-13,-20,-26,-26,-20,-14,-41,-41,-53,-41,-37,-35,-24,-31,-35,0,0,0,0,0,0,0,-8,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O O-O 6. Re1 d6 7. a4 h6 8. c3 Nh7 9. a5 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack} a6 {LiveBook: 93 Games} 10. h3 (10. Be3 Kh8 11. d4 f5 12. exf5 e4 13. Nfd2 Rxf5 14. d5 {0-1 (33) Salgado Lopez,I (2624)-Bruzon Batista,L (2685) Camarinas 2013}) 10... Kh8 11. d4 f5 {[#] aiming for ...fxe4.} 12. dxe5 $146 (12. Bd3 $11) ({Predecessor:} 12. d5 fxe4 13. Rxe4 Nb8 14. Re1 c6 {½-½ (14) Hansen,S (2578)-Schandorff,L (2501) Svendborg 2016}) 12... fxe4 $1 $15 13. Rxe4 Rxf3 $1 14. gxf3 Nxe5 15. Rxe5 dxe5 16. Qxd8+ Bxd8 17. Kg2 Ng5 (17... Bd7 {is interesting.} 18. Be3 Ng5 19. h4 Nh7 20. Nd2 Bxh4 21. Bd5 c6) 18. Bxg5 Bxg5 19. Na3 Bf5 20. Re1 Bf4 21. Bd5 c6 22. Be4 Be6 23. Rd1 Kg8 24. Nc2 Kf8 25. Nb4 Ke7 26. Nd3 Rd8 27. Re1 Kd6 28. Nxf4 {The position is equal.} exf4 $11 {[%mdl 4096] Endgame KRB-KRB} 29. h4 g5 30. hxg5 hxg5 31. Rh1 Ke5 32. Rh5 Kf6 33. Rh6+ Ke5 34. Rh5 Kf6 35. Rh6+ Ke5 {Accuracy: White = 58%, Black = 80%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "5"]
[White "Gonzales Vidal, Yuri"]
[Black "Perez Ponsa, Federico"]
[Result "1/2-1/2"]
[ECO "E60"]
[WhiteElo "2562"]
[BlackElo "2560"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,51,13,26,20,19,19,23,0,34,43,39,41,60,55,42,28,47,46,77,31,88,36,54,37,157,140,143,101,92,66,58,56,57,54]} 1. Nf3 Nf6 2. c4 g6 3. d4 Bg7 4. e3 O-O 5. Be2 c5 (5... d6 6. Nc3 Bf5 7. Qb3 b6 8. d5 a5 9. Nd4 Bd7 10. O-O Na6 11. Qd1 Nc5 12. Bf3 Rc8 13. a3 e5 14. dxe6 Nxe6 {0-1 (56) Topalov,V (2747)-Ding,L (2797) Wenzhou 2018}) 6. d5 {E60: King's Indian: Unusual lines and Fianchetto Variation without Nc3} e6 7. Nc3 exd5 8. cxd5 d6 9. O-O Re8 10. Nd2 Nbd7 {LiveBook: 18 Games} 11. e4 a6 12. a4 $1 {[%cal Ba2a4,Ba4a5][%mdl 32]} Ne5 13. Qc2 g5 {[#]} 14. Ra3 $146 ({Predecessor:} 14. Re1 h6 15. Nf1 Ng6 16. Ne3 Nf4 {0-1 (59) Sambuev,B (2530)-Preotu,R (2277) Montreal 2013}) 14... Rb8 15. a5 h6 16. Re1 Bd7 17. Nd1 Rc8 18. b3 Ng6 19. Ne3 Nf4 ({Black should try} 19... Qe7 $1 $14) 20. Bf1 (20. Bb2 $16) 20... Qe7 $14 {[%cal Rf6e4]} 21. Bb2 Ng4 (21... Nxe4 $14 22. Bxg7 Nxd2 23. Qxd2 Kxg7) 22. Bxg7 $16 Kxg7 23. Nxg4 Bxg4 24. Raa1 Qf6 25. Nc4 Ng6 26. Rab1 {Accuracy: White = 52%, Black = 34%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "5"]
[White "Martinez Alcantara, Jose Eduardo"]
[Black "Acosta, Pablo Ismael"]
[Result "1-0"]
[ECO "B42"]
[WhiteElo "2541"]
[BlackElo "2463"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,71,36,35,22,47,46,56,35,45,28,53,0,60,6,0,0,31,-3,64,64,65,72,77,67,85,70,100,79,114,114,218,208,262,210,253,214,252,208,240,214,281,221,297,304,479,480,470,428,503,246,808,833,779,369,360,355]} 1. Nf3 c5 2. e4 e6 3. d4 cxd4 4. Nxd4 a6 5. Bd3 Nf6 6. O-O Qc7 7. Qe2 d6 8. f4 {[%cal Bf2f4,Bf4f5][%mdl 32]} g6 9. f5 {B42: Sicilian: Kan Variation: 5 Bd3} (9. Nc3 Bg7 10. e5 dxe5 11. Ndb5 axb5 12. Nxb5 Qe7 13. fxe5 O-O 14. exf6 Bxf6 15. c3 Bg7 16. Bc4 Kh8 {½-½ (60) Lampert,J (2546)-Gordievsky,D (2638) Biel 2018}) 9... Bg7 {LiveBook: 15 Games} 10. Bg5 {[#] aiming for fxg6.} O-O 11. Nd2 {White is slightly better.} e5 12. N4b3 Nbd7 13. c4 $146 ({Predecessor:} 13. a4 b6 14. a5 b5 15. c4 b4 16. c5 dxc5 {0-1 (32) Tshabalala,E (2003)-Agulhas,K (1887) Gauteng 2017}) 13... b6 14. Kh1 (14. Nb1 $14) 14... Bb7 ({Black should play} 14... h6 $11 15. Be3 Bb7) 15. Rac1 (15. Nb1 $14) 15... Nh5 $11 16. g3 h6 17. Be3 Qd8 (17... Nhf6 $11) 18. Nb1 $14 Nhf6 19. Nc3 b5 20. Nd2 bxc4 21. Bxc4 {[#] Black must now prevent fxg6.} Kh8 22. Rcd1 Nb6 23. Bb3 Nbd7 (23... d5 $16) 24. g4 Rc8 {intending ...Rxc3.} 25. g5 hxg5 26. Bxg5 Nxe4 27. Ndxe4 Qxg5 28. Nd5 Qh4 29. Nxd6 Rb8 30. Qg2 Bc6 (30... Bxd5 {keeps fighting.} 31. Bxd5 (31. Qxd5 g5 $18) 31... e4 32. Nxf7+ Rxf7) 31. Rf3 $18 Rxb3 32. axb3 Kg8 33. Rh3 (33. fxg6 $142 Bxd5 34. gxf7+ Rxf7 35. Nxf7 {[%mdl 64] Pin}) 33... Qd8 $2 (33... Bxd5 34. Rxh4 Bxg2+ 35. Kxg2 g5) 34. fxg6 fxg6 35. Ne7+ (35. Rg3 $142 Nc5 36. Rxg6) 35... Qxe7 36. Qxc6 {Accuracy: White = 54%, Black = 47%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.07"]
[Round "5"]
[White "Aguirre Contreras, Cristian"]
[Black "Delgado Ramirez, Neuris"]
[Result "0-1"]
[ECO "B22"]
[WhiteElo "2299"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]

{[%evp 19,56,0,-3,-27,-33,-60,-54,-73,-71,-66,-67,-61,-57,-70,-94,-84,-81,-75,-84,-127,-131,-130,-43,-65,-35,-213,-206,-219,-214,-187,-117,-241,-190,-211,-191,-201,-140,-691,-683]} 1. e4 {[%cal Be2e4,Be4e5][%mdl 32]} c5 2. c3 Nf6 3. e5 Nd5 4. d4 cxd4 5. Nf3 Nc6 6. cxd4 d6 7. exd6 Qxd6 8. Nc3 g6 9. Qb3 {B22: Sicilian: 2 c3} Nxc3 (9... Be6 10. Qxb7 Rb8 11. Qa6 Bg7 12. Bb5 Ndb4 13. Qa4 O-O 14. O-O a6 15. Bxc6 Nxc6 16. d5 Bxd5 {1-0 (33) Vajda,L (2564)-Cosma,I (2414) Calimanesti 2014}) 10. bxc3 Bg7 {LiveBook: 6 Games} 11. Ba3 {The position is equal.} Qc7 12. Bd3 $146 ({Predecessor:} 12. Bb5 O-O 13. O-O Bg4 14. Rfe1 Bxf3 15. gxf3 Bf6 16. Rad1 Rfd8 {½-½ (32) Badev,K (2297)-Kozhuharov,S (2411) Plovdiv 2009}) 12... Be6 $1 {[%cal Re6b3]} 13. Qa4 Bd5 14. O-O Bxf3 15. gxf3 O-O 16. Rfe1 Rfd8 17. Be4 e6 18. Rab1 Rac8 19. Rb5 b6 20. d5 exd5 (20... Na5 $17 {Hoping for ...a6.} 21. dxe6 fxe6) 21. Rxd5 $15 Bxc3 22. Rc1 $2 {[#]} (22. Red1 $1 $15 Rxd5 23. Bxd5) 22... Rxd5 $1 $19 23. Bxd5 Nd4 24. Qa6 Re8 (24... Rd8 $19 25. Qc4 Qe5) 25. Be4 (25. Kh1 $17) 25... b5 $36 {[%cal Bb6b5,Bb5b4][%mdl 2080] Strongly threatening ...Re6. Black is on the roll.} 26. Bd6 Qd8 27. Kh1 b4 28. Rd1 $2 {[%mdl 8192] [#]} (28. Bg3 $17) 28... Re6 {Precision: White = 32%, Black = 67%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "6"]
[White "Delgado Ramirez, Neuris"]
[Black "Vera Siguenas, Deivy"]
[Result "0-1"]
[ECO "C77"]
[WhiteElo "2623"]
[BlackElo "2483"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,82,-44,3,26,20,0,16,20,32,24,112,108,203,92,94,91,95,102,93,129,322,77,80,91,166,132,131,131,128,133,121,85,129,122,122,135,129,124,146,134,119,150,137,97,100,0,0,0,0,-35,0,-71,-92,-581,-578,-578,-584,-551,-558,-555,-550,-525,-458,-1019,-1033,-1311,-1293]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 {[%cal Bf1b5,Bb5a4,Ba4b3,Bb3d5][%mdl 32]} a6 4. Ba4 Nf6 5. Qe2 b5 6. Bb3 Bc5 7. c3 O-O 8. d3 h6 {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines} (8... Re8 9. h3 Bb7 10. Nbd2 Bb6 11. Nf1 d5 12. Ng3 Na5 13. Bc2 c5 14. O-O c4 15. dxc4 Nxe4 16. Nxe4 dxe4 {1-0 (48) Svidler,P (2751)-Mikhalevski,V (2528) Tallinn 2016}) 9. h3 d6 {LiveBook: 4 Games} 10. g4 Nh7 {White has an edge.} 11. Bd5 Bd7 12. g5 hxg5 13. Rg1 g4 (13... Qe8 $11) 14. hxg4 $16 Rb8 (14... g5 $16 {was necessary.}) 15. Qf1 $146 {[%mdl 2048] White is in control.} (15. Rh1 $18 {and White stays clearly on top.}) ({Predecessor:} 15. b4 Bb6 {1-0 (15) Shapar,T (1877)-Maouchi,A (1613) Durban 2014}) 15... Ne7 16. Bb3 Ng6 17. Qh3 $1 Re8 18. Rh1 Nhf8 $2 (18... Nf6 $16) 19. Qh5 $2 (19. Bg5 $18 {and the rest is easy.} Qc8 20. Nh4 Bxg4 21. Qh2) 19... Be6 20. Nh4 Bxb3 (20... b4 $16) 21. axb3 $18 d5 {Black wants to play ...dxe4.} 22. Nd2 {Hoping for Ndf3.} (22. Rxa6 dxe4 23. d4 (23. Nxg6 fxg6 24. Rxg6 Nxg6 $11) (23. dxe4 $2 Qd3 $19 {[%mdl 64] Double Attack}) 23... Bb6 $17) 22... Be7 {[%cal Rg6h4]} (22... Nf4 23. Qh8+ $1 {[%mdl 512]} Kxh8 24. Ng6+ Kg8 25. Rh8#) 23. Nxg6 fxg6 24. Qh8+ (24. Qxe5 dxe4 25. dxe4 Bg5 $15) 24... Kf7 25. Qh3 ({Not} 25. Rxa6 dxe4 26. Qh3 (26. Nxe4 $2 Qxd3 27. f3 Qc2 $19) (26. dxe4 Ra8 $15) 26... Qxd3 $11) 25... Ne6 26. Nf3 $1 {[%cal Rf3e5]} ({Of course not} 26. Rxa6 $6 Nf4 $11) 26... Bf6 27. g5 $1 {[%cal Rg5f6]} ({Worse is} 27. Rxa6 dxe4 28. dxe4 Ra8 $15) 27... dxe4 28. dxe4 Nxg5 29. Bxg5 Bxg5 30. Rxa6 Bf6 31. Rg1 (31. Ke2 $16 {Threatens to win with Rd1.} Ra8 32. Rha1 Rxa6 33. Rxa6) 31... Ra8 $1 $11 {[%cal Ra8a6]} 32. Rc6 Ra2 33. Qg3 g5 34. Qh3 {[#]} (34. Nxg5+ $11 {keeps the balance.} Kg8 35. Ne6 Ra1+ 36. Ke2 Rxg1 37. Qxg1) 34... Kg8 $1 $17 {( -> ...Qd3)} 35. Rh1 $4 {[%mdl 8192] [#]} (35. Re6 $17 {is tougher.} Rxb2 36. Kf1) 35... Ra1+ $1 $19 {Black is clearly winning.} 36. Ke2 Rxh1 37. Qxh1 Qa8 38. Rxc7 {Threatening Nd2.} Qxe4+ 39. Kf1 Qd3+ 40. Kg1 (40. Kg2 $142 e4 41. Nxg5) 40... e4 41. Nd4 Ra8 {Accuracy: White = 51%, Black = 61%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "6"]
[White "Bacallao Alonso, Yusnel"]
[Black "Abarca Gonzalez, Nicolas"]
[Result "1-0"]
[ECO "B92"]
[WhiteElo "2583"]
[BlackElo "2416"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,69,14,10,0,19,0,75,82,75,84,72,69,74,70,91,79,78,77,411,419,493,489,483,452,451,406,480,452,582,581,556,524,545,538,638,640,776,783,754,747,729,718,818,815]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. Bg5 O-O 9. Bxf6 Bxf6 10. Qd3 Be6 11. O-O-O {B92: Sicilian Najdorf: 6 Be2} (11. Rd1 Be7 12. Nd5 Bxd5 13. Qxd5 Qc7 14. c3 Nd7 15. Nd2 Rad8 16. O-O Bg5 17. Nf3 Nb6 18. Qb3 Bh6 {½-½ (32) Mastrovasilis,D (2580)-Saric,I (2689) Rio Achaea 2018}) 11... Be7 12. Nd5 Bxd5 13. Qxd5 Nc6 14. Kb1 Qc7 {LiveBook: 3 Games} 15. c3 b5 16. Rhf1 b4 {[#]} (16... Rfd8 $11 {keeps the balance.}) 17. Rc1 $1 $16 {Hoping for cxb4.} Qb6 $146 ({Predecessor:} 17... Bg5 18. cxb4 Bxc1 19. Rxc1 Rfc8 20. Bg4 Qb6 21. Bxc8 Rxc8 22. Qxd6 {1-0 (22) Pierrot,J (2444)-Maucci,L (1970) Mar del Plata 2012}) 18. cxb4 Nxb4 19. Qa5 Qb7 20. Rc4 Rfb8 21. Rfc1 {Rxb4! is the strong threat.} Bd8 22. Qa4 $36 {[%cal Ra4e8][%mdl 2048] White is on the roll.} Bg5 $2 {[%mdl 8192] [#]} (22... g6 $16 {is tougher.}) 23. Rxb4 $1 $18 {[%mdl 512]} Qxb4 {[#]} 24. Rc8+ $1 {[%mdl 576] Deflection} Rxc8 25. Qxb4 a5 26. Qa4 Rcb8 27. Bc4 {White is clearly winning.} Rb4 28. Qc6 {[%mdl 64] Double Attack} Rab8 29. a3 R4b6 30. Qa4 h6 31. Qxa5 Rxb3 32. Bxb3 Rxb3 33. Qa8+ Kh7 34. Qd5 Rb6 35. b4 {Accuracy: White = 84%, Black = 36%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "6"]
[White "Cruz, Cristhian"]
[Black "Martinez Alcantara, Jose Eduardo"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "2564"]
[BlackElo "2541"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,51,23,18,27,0,0,0,0,0,13,-7,0,-14,0,0,0,0,12,0,20,0,0,0,0,0,0,0,0,-151,-26,-166]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 b6 7. Nf3 Bb7 8. e3 d6 9. b3 Nbd7 10. Bb2 Qe7 11. Be2 c5 12. O-O {LiveBook: 12 Games} Rfd8 {E32: Nimzo-Indian: Classical (4 Qc2): 4...0-0} (12... Rac8 13. Rac1 Rfd8 14. Rfd1 Nf8 15. dxc5 bxc5 16. Nd2 e5 17. Bf3 Ng6 18. Bxb7 Qxb7 19. Qc2 h6 20. Bc3 {1-0 (41) Noe,C (2494)-Kasimdzhanov,R (2676) Karlsruhe 2018}) 13. Rad1 $146 ({Predecessor:} 13. Rfd1 Rac8 {½-½ (13) Draskovic,L (2419)-Drasko,M (2431) Podgorica 2014}) 13... d5 14. cxd5 Nxd5 {The position is equal.} 15. Qd2 Rac8 16. Bc4 N5f6 17. Qe2 h6 18. dxc5 Nxc5 19. Rxd8+ Rxd8 20. Rd1 Bd5 21. Bxf6 Qxf6 22. Bxd5 Rxd5 23. Rxd5 exd5 24. Nd4 Ne6 25. Nc2 $2 {[#]} ({White should try} 25. Qf3 $11) 25... Qc3 (25... Qb2 $17 26. Nd4 Qc1+ 27. Qf1 {[#]} Nxd4 $1 {[%mdl 512]} 28. exd4 Qxa3) 26. Nd4 {Accuracy: White = 32%, Black = 35%.} (26. b4 $11 {and White is okay.}) 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "6"]
[White "Gonzalez Vidal, Yuri"]
[Black "Granda Zuniga, Julio E"]
[Result "1/2-1/2"]
[ECO "C55"]
[WhiteElo "2562"]
[BlackElo "2641"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,64,42,39,55,46,65,55,57,37,66,42,52,37,52,28,89,65,68,25,36,24,31,35,31,-30,-19,-25,0,-14,-14,-14,-14,-21,-14,-22,-21,-21,-21,-21,-21,-21,-21,-21,-21,-21,-21,-21,-21,-74,-75,-110,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O O-O 6. Re1 d6 7. a4 {LiveBook: 1302 Games} b6 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack} (7... Kh8 8. Nc3 Ng8 9. Nd5 f5 10. h3 fxe4 11. dxe4 Nf6 12. a5 a6 13. Ra3 Be6 14. Nxf6 Bxc4 15. Nd5 Bb5 {½-½ (67) Caruana,F (2822)-Grischuk,A (2766) Saint Louis 2018}) 8. c3 Bb7 9. Nbd2 Qd7 $146 {White is slightly better.} ({Predecessor:} 9... Ne8 10. Nf1 g6 11. Bh6 Ng7 12. Ne3 Qd7 13. d4 Rad8 14. Nd5 Kh8 15. Bb5 {1-0 (50) Karpatchev,A (2513)-Reichstein,H (2077) Neustadt an der Weinstrasse 2017}) 10. Nf1 Rae8 11. Bg5 Nd8 12. Ng3 Ne6 13. Bd2 c6 (13... a6 $11 {remains equal.}) 14. b4 Bd8 15. Bb3 c5 16. b5 a5 17. bxa6 Bxa6 18. Bc4 (18. Be3 $14) 18... Bxc4 $11 19. dxc4 Bc7 20. Bg5 Nxg5 21. Nxg5 Ra8 22. Re2 g6 23. f3 Ra6 24. Rea2 Rfa8 25. Nh3 Bd8 26. Nf1 Ne8 27. Ne3 Nc7 28. Qc2 h5 29. Qb3 Bf6 30. Nd5 (30. Kf1 $11) 30... Nxd5 $17 31. cxd5 {[#]} Bg7 (31... c4 $1 $17 {[%cal Rc4b3][%mdl 512]} 32. Qb4 (32. Qxc4 b5) 32... Ra5) 32. c4 $11 Bf6 {Accuracy: White = 51%, Black = 65%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "6"]
[White "Perez Ponsa, Federico"]
[Black "Flores, Diego"]
[Result "1-0"]
[ECO "A14"]
[WhiteElo "2560"]
[BlackElo "2609"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,59,10,-13,0,-12,-5,-14,43,36,53,23,79,36,39,38,36,37,37,34,78,39,97,102,159,149,167,147,251,247,247,258,252,241,339,304,396,385,1020,944]} 1. c4 e6 2. Nf3 d5 3. b3 Nf6 4. Bb2 b6 5. g3 Be7 6. Bg2 O-O 7. O-O Bb7 8. e3 dxc4 9. bxc4 c5 10. Qe2 Nc6 11. Nc3 Rc8 {[%cal Ba8c8,Bc8c7,Bc7d7][%mdl 32]} 12. Ne1 {[%cal Bf3e1,Be1c2,Bc2e3][%mdl 32] LiveBook: 14 Games. A14: English Opening: 1...e6 with b3 by White} Rc7 (12... Qd7 13. f4 Rfd8 14. Rd1 Na5 15. Bxb7 Qxb7 16. d3 a6 17. a4 Ne8 18. f5 Bf6 19. fxe6 fxe6 {0-1 (49) Giri,A (2771)-So,W (2812) Stavanger 2017}) 13. f4 Rd7 14. d3 $146 {The position is equal.} ({Predecessor:} 14. Rd1 Qa8 15. d3 Rfd8 16. g4 Nb4 17. Rf2 Ne8 18. a3 Nc6 19. Nf3 Bf6 {1-0 (38) Dizdar,G (2380)-Kelecevic,N (2390) Vrbas 1982}) 14... Qa8 (14... Ne8 $11) 15. f5 $14 exf5 16. Rxf5 Bd8 (16... Qc8 $11) 17. Nc2 (17. Bh3 $5 {[%cal Rf5f6]} Bc8 18. Rf4 $16) 17... Ne8 18. Raf1 Ne7 $1 {[#] Strongly threatening ...Bxg2.} 19. Bxb7 Qxb7 20. R5f2 $36 {[%mdl 2048] White is more active.} Ng6 21. e4 (21. h4 {is more complex.} f6 22. e4 b5 23. Ne3 bxc4 24. Nxc4 Bc7 25. h5) 21... Nc7 (21... Bc7 $14) 22. Ne3 $16 a6 ({Better is} 22... f6) 23. Ncd5 Nxd5 24. cxd5 Re8 (24... f6 $16 25. h4 Rdf7) 25. h4 $18 {[%cal Bh2h4,Bh4h5,Bh5h6][%mdl 32]} Qc7 26. h5 Ne5 ({But not} 26... Qxg3+ 27. Rg2 $18) 27. Ng4 f6 (27... h6 {keeps fighting.} 28. Nxe5 Rxe5 29. Bxe5 Qxe5) 28. h6 Nxg4 29. Qxg4 c4 $2 {[#]} (29... Rf7 30. Bxf6 Bxf6 31. Rxf6 Qd7 32. Qxd7 (32. Rxf7 Qxg4 33. Rxg7+ Qxg7 $18) 32... Rxd7) 30. Bxf6 {Accuracy: White = 66%, Black = 32%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "6"]
[White "Acosta, Pablo Ismael"]
[Black "Pichot, Alan"]
[Result "0-1"]
[ECO "A34"]
[WhiteElo "2463"]
[BlackElo "2581"]
[Annotator "TA"]
[PlyCount "122"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,122,9,12,6,9,23,0,0,0,0,0,0,0,0,0,0,-2,0,-10,0,-7,-4,-4,-4,-18,-4,-4,-6,-11,-11,-11,-11,-11,-11,-11,-11,-11,-11,-11,-11,-11,-7,-7,-4,-4,-4,-4,-4,-4,-4,-7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,-8,-8,-8,-8,-8,-8,-8,-1155,-1062,-352,-352,-274,-8,-8,-8,-8,-8,-126,0,0,0,0,0,0,0,-5169,-8,-5167,-5167,-5167,-5145,-5145,-5145,-5145,-5120,-5106,-243,-5073,-5073]} 1. c4 c5 2. Nc3 Nc6 3. e3 e5 4. Nf3 Nf6 5. Be2 d5 6. cxd5 {A34: Symmetrical English: 2 Nc3, lines with ...d5} (6. d4 exd4 7. exd4 cxd4 8. Nxd4 dxc4 9. Nxc6 Qxd1+ 10. Kxd1 bxc6 11. Bxc4 Bg4+ 12. Kc2 Bf5+ 13. Bd3 Bxd3+ 14. Kxd3 O-O-O+ 15. Kc2 Bc5 {½-½ (33) So,W (2778)-Vachier Lagrave,M (2789) Leuven 2018}) 6... Nxd5 7. O-O Be7 8. d4 exd4 9. exd4 {LiveBook: 11 Games} Nxc3 10. bxc3 {next d5 is good for White.} O-O 11. Be3 cxd4 12. Nxd4 Bd7 13. Rb1 $146 ({Predecessor:} 13. Bf3 Qc8 14. Qb3 Bf6 15. Rac1 Qc7 16. Bd5 Na5 17. Qb4 Rad8 18. c4 Nc6 19. Nxc6 bxc6 20. Bf3 Rb8 {½-½ (20) Visti,H-Kanko,I (2345) Kuopio 1995}) 13... Nxd4 14. Bxd4 b6 15. Bc4 Rc8 16. Bb3 Bc5 17. Re1 Bc6 18. Re3 Qd6 19. Bxc5 Qxc5 20. Qd4 $1 Qxd4 21. cxd4 Rfe8 22. Rc1 {Hoping for Rxc6!} Bd7 23. Rxe8+ Rxe8 $11 {[%mdl 4096] Endgame KRB-KRB} 24. f4 {Black should prevent Rc7.} Rc8 25. Rxc8+ Bxc8 {KB-KB} 26. a3 Kf8 27. Kf2 Ke7 28. Ke3 b5 29. Kd2 Bf5 30. Kc3 a5 31. Bd5 f6 32. Bc6 Bd7 33. Be4 g6 34. g3 Kd6 35. Bf3 g5 36. fxg5 fxg5 37. h4 g4 38. Be4 h6 $1 39. Bg2 Bc6 40. Bf1 $1 Be8 41. Be2 Bd7 {White must now prevent ...Kd5.} 42. Bf1 b4+ 43. axb4 axb4+ 44. Kxb4 Kd5 45. Kc3 {Threatens to win with Bg2+.} Ke4 $1 {[%cal Re4f3]} 46. Kd2 $2 {[%mdl 8192]} (46. Bg2+ $11 Ke3 47. Bb7) 46... Kf3 $19 47. h5 Kxg3 48. Ke3 Kh2 $2 (48... Bc6 $1 $19 {Strongly threatening ...Kh2.} 49. Be2 Bd5) 49. d5 $11 g3 50. Kf3 {[#]} Bb5 $1 {[%mdl 512]} 51. d6 (51. Bg2 $11 {was the only way to keep the balance.}) (51. Bxb5 g2) 51... Ba4 (51... Bxf1 $17 52. d7 g2) 52. Kf4 Bc6 53. Ke5 Kg1 54. Bh3 Kf2 55. Kf4 $2 {[%mdl 8192] [#]} (55. Ke6 $11 g2 56. Bxg2 $1 {[%mdl 512]} Kxg2 57. d7 (57. Ke7 Kg3 $11) 57... Bxd7+ 58. Kxd7) 55... Be8 $2 (55... Bd7 $1 $19 {[%cal Rd7h3][%mdl 512]} 56. Bxd7 g2) 56. Ke5 $2 {[%mdl 8192] [#]} ({Don't go for} 56. d7 $2 {[#]} Bxd7 $1 {[%mdl 512]} 57. Bxd7 g2 $19) (56. Kg4 $11) 56... Bd7 $1 $19 {[%cal Rd7h3][%mdl 512]} 57. Bxd7 g2 58. Be6 g1=Q 59. d7 Qg3+ 60. Kf6 Qg5+ 61. Kf7 Qd8 {Precision: White = 56%, Black = 63%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "7"]
[White "Pichot, Alan"]
[Black "Bacallao Alonso, Yusnel"]
[Result "0-1"]
[ECO "B12"]
[WhiteElo "2581"]
[BlackElo "2583"]
[Annotator "TA"]
[PlyCount "102"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,102,21,25,29,33,31,39,36,21,16,16,0,1,8,9,10,1,0,7,4,10,8,12,0,15,0,14,0,0,-17,-14,-21,-19,-56,-44,-52,-19,-43,0,-68,0,-76,0,0,0,0,0,0,0,0,0,0,0,-128,-21,-119,-127,-131,-122,-134,-129,-278,-268,-241,-252,-302,-301,-365,-355,-602,-592,-579,-575,-597,-598,-586,-537,-547,-511,-9432,-9432,-7096,-7067,-6131,-6086,-5281,-5263]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nd2 e6 5. Nb3 Ne7 6. Nf3 {B12: Caro-Kann: Advance Variation} h6 7. Be2 Nd7 8. O-O Nc8 (8... g5 9. Ne1 Qc7 10. f4 c5 11. Nxc5 Nxc5 12. dxc5 Qxc5+ 13. Kh1 d4 14. Nd3 Qc7 15. fxg5 {0-1 (32) Shirov,A (2636)-Nakamura,H (2763) Douglas 2018}) 9. a4 Be7 {LiveBook: 41 Games} 10. Be3 O-O 11. Ne1 Ncb6 $146 ({Predecessor:} 11... c5 12. Nxc5 Bxc5 13. dxc5 Nxe5 14. f4 Nd7 {½-½ (65) Brandenburg,D (2483)-Willemze,T (2417) Wijk aan Zee 2007}) 12. Nd2 a5 13. f4 c5 14. Bd3 cxd4 15. Bxd4 Bc5 16. Nb3 Bxd4+ 17. Nxd4 Be4 18. Bb5 Nc5 19. Qe2 Nc8 20. Ra3 Qb6 21. Qe3 Ne7 22. Rc3 {Nb3 is the strong threat.} Rfc8 23. g4 Na6 24. Rxc8+ (24. f5 {with more complications.} Rxc3 25. bxc3 exf5 26. gxf5 Kh7 27. f6) 24... Rxc8 25. f5 exf5 26. gxf5 Nc6 27. Bxc6 bxc6 28. c3 ({White should try} 28. f6 $1 $11 Nc7 29. fxg7) 28... Re8 ({Don't play} 28... Qxb2 $6 29. f6 $11) (28... Kh7 $15) 29. Qg3 {[#]} (29. e6 $1 $11) 29... Nc7 ({Of course not} 29... Qxb2 30. f6 $14) (29... Kh8 $1 $17) 30. e6 $1 $11 {[%cal Re6f7] [#]} Nxe6 $1 {[%mdl 512]} 31. fxe6 Rxe6 {aiming for ...Rg6.} 32. Rf4 $1 Rg6 $36 {[%mdl 2048] Black has some pressure.} 33. Rg4 Rxg4 34. Qxg4 Qxb2 35. Qg3 (35. Qc8+ $11 Kh7 36. Qxc6) 35... c5 (35... Qa3 $17 36. Nxc6 Kh7) 36. Nb5 (36. Nc6 $1 $11 {remains equal.}) 36... Qa1 $17 37. Nd6 Qxa4 38. Qf4 f6 39. Nxe4 (39. Kf1 $17 {was called for.}) 39... Qxe4 $19 ({And not} 39... dxe4 40. Qb8+ Kf7 41. Qd6 $11) 40. Qd2 a4 41. Nc2 h5 42. h4 Kh8 43. Na3 $2 (43. Qf2) 43... Qg4+ {Black is clearly winning.} 44. Kf1 Qf3+ 45. Kg1 {[#]} d4 $1 {[%mdl 512]} 46. Nb5 (46. cxd4 Qxa3) 46... Qg4+ 47. Kf1 Qxh4 48. cxd4 (48. Qd3 $142 Qf4+ 49. Ke2) 48... Qh1+ 49. Kf2 Qh2+ 50. Ke3 Qxd2+ 51. Kxd2 cxd4 {Accuracy: White = 34%, Black = 68%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "7"]
[White "Martinez Alcantara, Jose Eduardo"]
[Black "Perez Ponsa, Federico"]
[Result "1-0"]
[ECO "E60"]
[WhiteElo "2541"]
[BlackElo "2560"]
[Annotator "ChessBase"]
[PlyCount "23"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]
[TimeControl "5400+30"]

1. c4 {[%emt 0:00:57]} g6 {[%emt 0:00:00]} 2. d4 {[%emt 0:00:39]} Nf6 {[%emt 0:00:00]} 3. Nf3 {[%emt 0:00:08]} Bg7 {[%emt 0:00:03]} 4. g3 {[%emt 0:00:04]} O-O {[%emt 0:00:05]} 5. Bg2 {[%emt 0:00:08]} d6 {[%emt 0:00:07]} 6. O-O {[%emt 0:00:06]} Bf5 {[%emt 0:00:56]} 7. Nh4 {[%emt 0:03:29]} Be4 {[%emt 0:00:56]} 8. Nf3 {[%emt 0:02:24]} Bf5 {[%emt 0:02:07]} 9. Qb3 {[%emt 0:04:11]} Nc6 {[%emt 0:00:29]} 10. Qxb7 {[%emt 0:07:30]} Na5 {[%emt 0:00:10]} 11. Qa6 {[%emt 0:01:37]} c5 {[%emt 0:08:49]} 12. Bd2 {[%emt 0:00:16]} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "7"]
[White "Vera Siguenas, Deivy"]
[Black "Cruz, Cristhian"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2483"]
[BlackElo "2564"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,58,0,0,0,11,-14,-13,-13,0,-27,-14,-17,-36,-34,-14,-17,-2,-10,-6,-23,-20,-25,-20,-20,-18,-18,-18,-21,-18,-19,-16,-18,-16,-23,-7,-7,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. c3 a6 7. Bb3 O-O 8. h3 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} h6 9. Re1 Re8 10. Nbd2 Be6 11. Nf1 (11. Bc2 d5 12. exd5 Qxd5 13. b4 Bf8 14. a4 b5 {½-½ (60) Aronian,L (2764)-Karjakin,S (2782) Paris 2018}) 11... d5 12. exd5 Bxd5 {LiveBook: 14 Games} 13. Be3 Bf8 14. Ng3 Bxb3 15. axb3 a5 16. Qc2 Qd7 17. Rad1 Rad8 18. Bc1 Bc5 19. Ne4 Nxe4 20. dxe4 Qe6 21. Rxd8 (21. Nh2 {feels hotter.} Ne7 22. Nf1 Ng6 23. Be3 Bf8 24. Nd2) 21... Rxd8 {[#]} 22. Rd1 $146 Rxd1+ 23. Qxd1 Qd6 24. Qxd6 Bxd6 $11 {KBN-KBN} 25. Kf1 Nd8 26. Ke2 Ne6 27. Be3 f6 28. Ne1 Bc5 29. Nd3 Bxe3 {Accuracy: White = 59%, Black = 58%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "7"]
[White "Bolanos, Fernando"]
[Black "Granda Zuniga, Julio E"]
[Result "1/2-1/2"]
[ECO "B50"]
[WhiteElo "2231"]
[BlackElo "2641"]
[Annotator "TA"]
[PlyCount "174"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,174,0,-9,-12,-9,-6,-7,-9,-28,-11,-9,-9,-27,-29,-33,-26,-25,-18,-29,0,0,0,0,27,27,22,12,29,5,16,15,22,13,26,35,45,14,42,43,79,12,38,20,53,11,19,0,41,17,28,0,35,20,28,28,28,28,29,31,45,52,30,0,8,9,51,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-20,-19,-9,0,-12,0,0,68,-37,0,0,0,-256,-228,-289,-241,-401,-389,-526,0,0,8,8,8,0,166,165,154,0,0,0,0,0,60,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. c4 e5 4. Be2 (4. Nc3 Nc6 5. g3 g6 6. h4 h5 7. d3 Bh6 8. Bh3 Bxh3 9. Rxh3 Bxc1 10. Qxc1 Nf6 11. Rh1 Nd4 12. Nxd4 cxd4 {½-½ (72) Laznicka,V (2661)-Neuman,P (2420) Prague 2016}) 4... Nc6 5. Nc3 g6 6. d3 {B50: Sicilian: 2...d6, Miscellaneous} Bg7 7. h4 {LiveBook: 5 Games} h6 8. h5 g5 9. Nd2 $146 ({Predecessor:} 9. Nh2 Nge7 10. g4 Be6 11. Be3 Nd4 12. Qd2 Qd7 {½-½ (31) Pahomov,R (2220)-Chernov,M (2202) Ekaterinburg 2014}) 9... Nd4 10. g4 Ne7 11. Nf1 a6 12. a4 Bd7 13. Ne3 O-O 14. O-O b5 15. Bd2 bxc4 16. dxc4 Rb8 17. Ra2 Bf6 18. Ncd5 Nec6 19. Qe1 Kg7 20. Bd1 Qc8 21. f3 Bd8 22. Rf2 Rb7 23. Bc3 Qb8 24. Bc2 Qa7 25. Kg2 f6 26. Bd1 (26. a5 $16) 26... Be6 27. Ra3 Rff7 28. b3 Qb8 {[%cal Rd4b3]} 29. Rb2 Bb6 30. Ra1 Qd8 31. Rab1 Rb8 32. b4 cxb4 33. Nxb4 Nxb4 34. Rxb4 Nc6 35. R4b2 Bc5 36. Rxb8 Nxb8 37. Nd5 Qc8 38. a5 Rb7 39. Bc2 (39. Ba4 $14) 39... Nc6 $11 40. Rxb7+ Qxb7 41. Qb1 Qc8 42. Bd1 Kf7 43. Kf1 {[%cal Bg2f1,Bf1e1,Be1d2,Bd2d1][%mdl 32]} Nd4 44. Ke1 Bd7 45. Kd2 Bc6 46. Qb2 Ne6 47. Be2 Qa8 48. Nb6 Qb7 49. Nd5 Qa7 50. Kd1 Nf4 51. Bf1 Ne6 52. Be2 Nf8 53. Bb4 Nd7 54. Bc3 Qa8 55. Kd2 Qc8 56. Qa2 Nf8 57. Kd1 Ne6 58. Kd2 Nf4 59. Bf1 Bd7 60. Qb3 Be6 61. Qb1 Ba7 62. Qb4 Bc5 63. Qb1 Bd7 64. Qb3 Bc6 65. Kd1 Qd8 66. Kd2 Kg7 67. Qa2 Qd7 68. Qb3 Qa7 69. Kd1 Kf7 70. Nb6 f5 71. gxf5 Nxh5 (71... g4 $11) 72. Nd5 (72. Bb4 $1 $14) 72... Nf6 73. Bd2 Nd7 74. f4 $2 {[%mdl 8192]} (74. Bd3 $11) 74... exf4 $19 75. Qh3 {Threatens to win with Qh5+.} Bxd5 $1 76. Qh5+ $2 (76. cxd5 Qb7 77. Kc2) 76... Ke7 77. cxd5 Bb4 $2 (77... Qb7 $19 78. Bd3 Qb3+ 79. Bc2 Qa3) 78. Bxb4 $11 {Black must now prevent Bc3.} Qd4+ 79. Bd2 Nf6 80. Qxh6 {Hoping for Kc2.} Nxe4 $2 {[#]} (80... Qa4+ $11 {and Black has nothing to worry.} 81. Kc1 Qa1+ 82. Kc2 Qa2+ 83. Kd1 Qa4+ 84. Kc1 Qa1+ 85. Kc2 Qa2+ 86. Kd1 Qb3+ 87. Kc1 Qa3+ 88. Kd1 Qa4+) 81. f6+ $1 $18 Nxf6 {[#]} (81... Qxf6 82. Qh7+) 82. Qxg5 $2 ({White has to play} 82. Qg7+ $1 $16 Ke8 83. Bxa6 Qa1+ 84. Ke2 f3+ {[%mdl 64] Decoy} 85. Kxf3 Qd1+ 86. Ke3 (86. Be2 g4+ 87. Kg3 Ne4+ 88. Kf4 Qxd2+ 89. Kxe4 Qxe2+ 90. Kf5 Qf3+ 91. Ke6 Qe2+ 92. Kxd6 Qa6+ {[%mdl 64] Double Attack} 93. Kc5 Qxa5+ 94. Kc4 Qa6+ 95. Kc5 Qd3 $11) 86... Ng4+ 87. Kd3 Ne5+ 88. Kc3 Qa1+ 89. Kc2 Qa2+ 90. Kd1 Qa4+ 91. Kc1 Qa3+ 92. Kc2 Qa2+ 93. Kd1 Qb3+ 94. Ke2 Qf3+ 95. Ke1 Qg3+ 96. Kd1 Qb3+ 97. Ke1 Qg3+ 98. Kd1 Qb3+) 82... Qa4+ $11 83. Ke2 Qe4+ 84. Kd1 Qb1+ ({Black should play} 84... Qa4+ $11 85. Ke1 Qe4+ 86. Be2 (86. Kd1 Qa4+ $11) 86... f3) 85. Ke2 (85. Bc1 $1 $14 Qb3+ 86. Kd2 (86. Ke1 Qb4+ 87. Bd2 Qe4+ 88. Be2 f3 $11) 86... Qb4+ 87. Kc2 Qa4+ 88. Kc3 Qxa5+ 89. Kb3 Qxd5+ 90. Qxd5 Nxd5 91. Bc4 (91. Bxa6 f3 $16)) 85... Qe4+ {The position is equal.} 86. Kf2 {Strongly threatening Qg7+.} Qd4+ 87. Ke2 Qe4+ {Accuracy: White = 52%, Black = 51%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "7"]
[White "Delgadillo, Adonay"]
[Black "Yuri, Gonzalez Vidal"]
[Result "1/2-1/2"]
[ECO "C95"]
[WhiteElo "2218"]
[BlackElo "2562"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,76,27,24,12,41,44,72,61,79,72,98,94,93,84,93,95,247,242,262,-18,-9,-33,-37,-45,-16,-15,0,0,0,-52,-45,-51,-58,-60,-18,-18,-22,-25,-2,-9,0,0,0,-15,0,0,0]} 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 Nb8 10. d4 Nbd7 11. Nbd2 c5 12. Nf1 {C95: Closed Ruy Lopez: Breyer Variation with 10 d4} Re8 13. Ng3 Bf8 14. Ng5 (14. Bc2 cxd4 15. cxd4 exd4 16. Bf4 Bb7 17. Nxd4 g6 18. Qd2 Nc5 19. Bg5 Bg7 {½-½ (37) Karjakin,S (2760)-Kovalev,V (2664) Batumi 2018}) 14... c4 15. Bc2 h6 16. Nf3 Bb7 {LiveBook: 7 Games} 17. d5 g6 18. Be3 Nc5 19. b4 cxb3 20. axb3 {[%cal Ba2b3,Bb3b4][%mdl 32]} Qc7 21. b4 $146 ({Predecessor:} 21. Qd2 Kh7 22. Rec1 Rec8 23. Nh2 Bg7 24. Ng4 {½-½ (46) Kassinopoullos,D (2110)-Arosemena Torrijos,J (2203) Khanty-Mansiysk 2010}) 21... Ncd7 22. Ra3 h5 23. Bd3 Bxd5 $2 (23... Reb8 $16) 24. exd5 $18 e4 25. Bd4 $2 ({White has to play} 25. Nxe4 $1 $18 Nxe4 26. Bd4) 25... exd3 $11 26. Rxe8 Rxe8 27. Qxd3 Qb7 28. c4 Rc8 (28... Ne5 {keeps more tension.} 29. Ne4 Nxe4 30. Qxe4 Bg7 31. Bxe5 Bxe5 32. Nxe5 Rxe5 33. Qd4 bxc4 34. Qxc4 Qb5) 29. cxb5 $1 axb5 30. Bxf6 (30. Ne4 $11 Bg7 31. Nc3 (31. Nxd6 Rc1+ 32. Kh2 Qb8 $17)) 30... Nxf6 $15 31. Ne4 Nxe4 ({Avoid the trap} 31... Nxd5 $2 {[#]} 32. Qxd5 $1 {[%mdl 512]} Rc1+ 33. Kh2 $18) 32. Qxe4 Rc1+ (32... Qc7 $5 {[%cal Rc7c1]} 33. Ra5 Qc1+ 34. Kh2 Rc4 $15) 33. Kh2 Rc4 34. Qe8 {[#] Strongly threatening Ra8.} Rc8 35. Qe4 {The position is equal.} Rc4 36. Qe8 {Black must now prevent Ra8.} Rc8 37. Qe4 Rc4 38. Qe8 {aiming for Ra8.} Rc8 {Accuracy: White = 54%, Black = 26%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.08"]
[Round "7"]
[White "Titichoca Daza, Daniel"]
[Black "Delgado Ramirez, Neuris"]
[Result "0-1"]
[ECO "B72"]
[WhiteElo "2179"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,65,67,65,69,66,77,66,103,-21,89,35,136,143,129,109,141,185,169,51,129,102,153,145,183,81,133,58,114,73,73,62,60,41,60,35,50,45,42,41,53,31,31,0,0,-22,-7,-6,-6,-427]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 a6 7. Be2 Bg7 8. Qd2 Nc6 9. O-O-O {B72: Sicilian Dragon: 6 Be3, lines with h3+Bc4 and sidelines} (9. f3 d5 10. exd5 Nxd5 11. Nxc6 bxc6 12. Bd4 Bxd4 13. Qxd4 O-O 14. O-O-O Be6 15. Qc5 Qb8 16. g3 a5 {1-0 (26) Topalov,V (2813)-Lu,S (2599) Baku 2015}) 9... Bd7 10. f3 {LiveBook: 5 Games} h5 11. h3 {White is slightly better.} h4 12. f4 Nh5 13. Nd5 $146 ({White should play} 13. Kb1 $16) ({Predecessor:} 13. Nxc6 Bxc6 14. Bxh5 Rxh5 15. Bd4 {1-0 (62) Bivol,A (2137)-Makarov,V (2047) Kostroma 2012}) 13... Rb8 (13... Ng3 $11 {keeps the balance.} 14. Nf3 Nxe4) 14. Bf3 (14. Rhe1 $16) 14... Na5 (14... e6 $1 $14 15. Nxc6 bxc6) 15. b3 $1 $16 Nc6 16. Kb1 Ng3 17. Rhe1 e6 {[#]} 18. Nc3 (18. Nb6 $1 $18 {[%mdl 512]}) 18... Rc8 ({Black should try} 18... O-O $14) 19. Nce2 Nxd4 (19... O-O $142) 20. Bxd4 e5 {White must now prevent ...Nxe2.} 21. fxe5 (21. Bb2 $18 {has better winning chances.}) 21... dxe5 {[#]} (21... Nxe2 $142 22. Bxe2 dxe5) 22. Bb2 (22. Bb6 $1 $16 {[%cal Rb6d8][%mdl 512]} Qe7 (22... Qxb6 23. Qxd7+) 23. Nxg3 hxg3 24. c4) 22... Be6 (22... Nxe2 $1 $14 23. Bxe2 (23. Rxe2 Be6 $14) 23... Be6) 23. Qxd8+ Rxd8 24. Rxd8+ Kxd8 25. Rd1+ Kc7 26. Nf4 Bc8 27. Nd5+ Kb8 $1 28. Nb6 Re8 29. Ba3 Bf8 30. Bxf8 Rxf8 {The position is equal.} 31. Nc4 f6 {[%cal Bf7f6,Bf6f5][%mdl 32]} 32. Nb6 f5 33. Rd7 $2 {[%mdl 8192] Accuracy: White = 34%, Black = 48%.} (33. Re1 $11) 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "8"]
[White "Granda Zuniga, Julio E"]
[Black "Aguirre Contreras, Cristian"]
[Result "1-0"]
[ECO "D53"]
[WhiteElo "2641"]
[BlackElo "2299"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,53,0,12,2,-6,0,-6,-15,-6,-49,0,0,0,0,0,0,145,151,235,258,252,185,236,153,235,226,220,218,200,207,381,231,516,511,502,531,488,491,600,602,597,546]} 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. Bg5 Be7 5. e3 O-O 6. Qc2 h6 7. Bh4 b6 {LiveBook: 8 Games. D53: Queen's Gambit Declined: 4 Bg5 Be7: Early deviations} (7... c5 8. dxc5 Nbd7 9. cxd5 Nxd5 10. Bxe7 Qxe7 11. Nxd5 exd5 12. Nf3 Nxc5 13. Be2 Bg4 14. O-O Rac8 15. Rfd1 Rfd8 16. h3 Ne6 17. Qa4 Bh5 18. Rd2 d4 19. Qxa7 Bxf3 20. Bxf3 Qb4 {½-½ (29) Kasparov,G (2812)-Dominguez Perez,L (2739) Saint Louis 2017}) 8. Bxf6 Bxf6 9. cxd5 exd5 {The position is equal.} 10. Nge2 $146 {[%cal Bg1e2,Be2f4,Bf4d5][%mdl 32]} ({Predecessor:} 10. b4 c5 11. bxc5 bxc5 12. dxc5 Nc6 13. Rc1 Qa5 14. Qd2 Bf5 15. Nf3 Rad8 16. Nd4 Nxd4 17. exd4 {½-½ (34) Szumniak,J (1975)-Smith,T (2252) Helsingor 2015}) 10... Bb7 11. O-O-O c5 12. dxc5 $1 bxc5 13. Nxd5 Bxd5 14. Nf4 {[#]} Qa5 (14... Bd4 $1 $11 {[%mdl 512]}) 15. Nxd5 $16 Bd8 (15... Nd7 $16) 16. Bc4 Nc6 17. a3 Rb8 (17... Ne5 {was necessary.} 18. Rd2 Nxc4 19. Qxc4 Re8) 18. f4 Rb7 (18... Ne7 $16) 19. Qe4 Kh8 20. g4 {Threatens to win with h4.} Bh4 21. Rd2 Rfb8 $2 (21... Qd8 22. Nc3 Qf6) 22. Rhd1 $40 {[%mdl 128] White is out for blood.} Qa4 $2 (22... Qd8 {keeps fighting.} 23. Nb4 Qe7 24. Qxe7 (24. Qxc6 cxb4 25. Rd8+ Kh7 $11) 24... Nxe7) 23. Nc3 $18 {White is clearly winning.} Qa5 24. Bd3 {[%csl Gd3][%cal Re4h7] [#]} g6 {Black wants to play ...Bf6.} 25. Qxc6 Rxb2 26. Rxb2 Qxc3+ 27. Rc2 {Accuracy: White = 72%, Black = 31%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "8"]
[White "Delgado Ramirez, Neuris"]
[Black "Abarca Gonzalez, Nicolas"]
[Result "1/2-1/2"]
[ECO "B10"]
[WhiteElo "2623"]
[BlackElo "2416"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,98,43,45,56,49,53,68,54,67,65,83,76,90,76,81,68,69,69,50,43,47,49,46,44,88,70,75,78,66,76,99,62,105,66,78,80,148,52,22,-4,0,-3,-3,0,0,-4,-6,0,-8,0,-11,-18,-14,-110,-110,-102,-119,-156,-115,-95,0,-225,-83,-59,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c6 2. c4 g6 3. Nc3 Bg7 4. h4 (4. d4 d6 5. h3 Nf6 6. Nf3 O-O 7. Bg5 a6 8. a4 a5 9. Be2 Na6 10. O-O c5 11. d5 h6 12. Bf4 Nd7 13. Qd2 Kh7 14. Bh2 Nb4 15. Rad1 b6 {1-0 (41) Korneev,O (2581)-Burmakin,V (2584) Sochi 2014}) 4... h5 5. d4 d6 {LiveBook: 3 Games} 6. Be3 {B10: Caro-Kann: 2 d3 and 2 c4} Nf6 7. f3 Na6 8. Qd2 {White is slightly better.} Qa5 9. Nge2 $146 ({Predecessor:} 9. Rd1 Bd7 10. a3 Qc7 11. b4 Qb8 12. Nh3 Bxh3 13. Rxh3 Nc7 14. e5 Nd7 15. exd6 exd6 {1-0 (48) Severiukhina,Z (2283)-Poletaev,V (2027) Izhevsk 2011}) 9... O-O 10. Nc1 Be6 11. Be2 Rfb8 12. O-O Qd8 13. Nb3 Nc7 14. Rac1 a5 15. d5 Bd7 16. a4 c5 17. Bh6 Bxh6 18. Qxh6 Qf8 19. Qf4 b6 20. g4 Qg7 21. e5 Nfe8 22. exd6 e5 (22... Nxd6 $142 23. gxh5 Nce8) 23. dxe6 (23. Qh2 $1 $16 Nxd6 24. gxh5) 23... Nxe6 $14 24. Qg3 Rd8 25. Kh2 $132 {[%mdl 2048] White has counterplay} Nxd6 26. Rcd1 ({Much weaker is} 26. Qxd6 Bxa4 27. Qg3 (27. Qxb6 $2 Rab8 $19) 27... Bxb3 $17) 26... Nd4 27. Nxd4 $1 cxd4 28. Nd5 $1 Bxa4 29. Rd2 hxg4 30. Bd3 b5 31. Nb6 {[#]} (31. cxb5 $1 $11 {was the only way to keep the balance.} Bxb5 32. fxg4) 31... bxc4 $1 $17 32. Nxc4 Nxc4 33. Bxc4 Rac8 34. b3 gxf3 (34... Bc6 $17 35. fxg4 Bd5 36. Bxd5 Rxd5) 35. h5 $2 {[#]} (35. Rxf3 $11 {and White has nothing to worry.} Be8 36. h5 $1 {[%mdl 512]}) 35... Rc5 ({Don't play} 35... gxh5 {[#]} 36. Bxf7+ $1 {[%mdl 512]} Kh7 37. Qxf3 $17) (35... Bb5 $1 $19 {[%mdl 512]} 36. Qxf3 (36. Bxb5 Qh6) 36... Bxc4 37. bxc4 Rxc4 38. hxg6 fxg6) 36. Qxg6 {Black must now prevent Bxf7+.} Qxg6 (36... Kh8 $15 37. Qxg7+ Kxg7 38. Rxf3 Rxh5+ 39. Kg3 Be8) 37. hxg6 $11 {The position is equal.} Kg7 38. gxf7 Rh5+ 39. Kg3 Bb5 40. Bxb5 Rxb5 41. Rxf3 {[%mdl 4096] Endgame KRR-KRR} Rb7 42. Rxd4 Rf8 $1 43. Rg4+ Kh8 44. Rgf4 {Strongly threatening Kf2.} Kg7 45. Kf2 {White wants to mate with Rg3+.} Rbxf7 46. Rg3+ Kh8 47. Rxf7 Rxf7+ 48. Ke3 Rd7 49. Ke2 Rd4 {Accuracy: White = 58%, Black = 63%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "8"]
[White "Bacallao Alonso, Yusnel"]
[Black "Cruz, Cristhian"]
[Result "1/2-1/2"]
[ECO "D58"]
[WhiteElo "2583"]
[BlackElo "2564"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,61,12,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2376,2356,2308,2284,2569,2429,29991,29992]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bg5 h6 6. Bh4 O-O 7. e3 b6 8. Be2 Bb7 9. Bxf6 Bxf6 10. cxd5 exd5 11. b4 c5 12. bxc5 bxc5 13. Rb1 Qa5 14. Qd2 cxd4 15. Nxd4 Bxd4 {[#] LiveBook: 17 Games. D58: Queen's Gambit Declined: Tartakower Defence} 16. Qxd4 $146 ({Predecessor:} 16. exd4 Ba6 17. Nb5 Qd8 18. O-O Nc6 19. Rfd1 Qf6 20. Bf1 Rab8 21. a4 Rfc8 22. Rb3 Bxb5 23. axb5 {1-0 (45) Karpov,A (2725)-Short,N (2685) Linares 1992}) 16... Nc6 17. Qd2 d4 {The position is equal.} 18. exd4 Ba6 19. Bxa6 Qxa6 20. Ne2 Rfe8 21. Rb2 Nxd4 22. Qxd4 {Threatens to win with Qg4.} Rad8 23. Qc3 Rc8 24. Qd2 {[#] Hoping for 0-0.} Rcd8 25. Qc3 Rc8 26. Qd2 {And now 0-0 would win.} Rcd8 27. Qb4 Qa5 $2 {[%mdl 8192] [#]} (27... Rc8 $11 28. Qd2) 28. Qxa5 $18 Rc8 29. Qd2 Rcd8 30. Qf4 Rxe2+ 31. Kxe2 {[%mdl 32768] An unexpected result.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "8"]
[White "Vera Siguenas, Deivy"]
[Black "Martinez Alcantara, Jose Eduardo"]
[Result "1/2-1/2"]
[ECO "B52"]
[WhiteElo "2483"]
[BlackElo "2541"]
[Annotator "TA"]
[PlyCount "40"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,40,-19,-20,-23,-23,-27,-27,-28,-14,-21,-25,-27,-24]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. O-O Nc6 6. c3 Nf6 7. Re1 e6 8. d4 cxd4 9. cxd4 d5 10. e5 Ne4 11. Nbd2 Nxd2 12. Bxd2 Be7 13. Rc1 O-O 14. a3 {B52: Sicilian: Moscow Variation with 3...Bd7} Rfc8 15. Rc3 Bd8 {LiveBook: 17 Games} 16. Qb1 {[#] The position is equal.} a5 $146 {[%cal Ba7a5,Ba5a4][%mdl 32]} ({Predecessor:} 16... Ne7 17. Rec1 Rxc3 18. Rxc3 Rc8 19. Qc2 h6 20. Rxc8 Qxc8 21. Qxc8 Nxc8 {½-½ (21) Kuzubov,Y (2623)-Areshchenko,A (2691) Kiev 2012}) 17. Qd3 a4 18. Rc2 Ne7 19. Rec1 Rxc2 20. Rxc2 Rc8 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "8"]
[White "Lopez Silva, Hugo"]
[Black "Flores, Diego"]
[Result "1/2-1/2"]
[ECO "B43"]
[WhiteElo "2399"]
[BlackElo "2609"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,93,80,84,101,76,76,38,20,31,36,-7,68,60,147,139,129,98,169,115,120,132,208,217,216,210,221,223,217,214,208,209,210,46,41,45,379,139,153,112,116,116,73,125,187,187,171,178,171,162,164,159,161,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,8,0]} 1. e4 c5 2. Nf3 e6 3. Nc3 a6 4. d4 cxd4 5. Nxd4 b5 6. g3 Bb7 7. Bg2 Nf6 8. a3 b4 {B43: Sicilian: Kan Variation: 5 Nc3} 9. axb4 Bxb4 10. O-O {LiveBook: 4 Games} d6 {White is better.} 11. Bg5 Nbd7 $146 ({Predecessor:} 11... Qc8 12. Bxf6 gxf6 {½-½ (12) Srebrnic,M (2332)-Lenic,L (2634) Ljubljana 2011}) 12. e5 (12. Na4 $5 {[%cal Re4e5]}) 12... Bxg2 13. exf6 gxf6 14. Qh5 Bxc3 (14... fxg5 $11 15. Kxg2 Qf6) 15. Nxe6 $1 $14 {[#]} Qe7 (15... Bf3 $1 $14 {[%mdl 512]} 16. Qxf3 fxe6 17. Qxc3 Rc8) 16. Ng7+ $16 Kd8 (16... Kf8 $2 17. Bh6 $18) 17. Kxg2 {aiming for Qf3.} Qe4+ (17... fxg5 $16 {was worth a try.} 18. Qf3 (18. bxc3 Qf6 $14) 18... Bxg7 19. Qxa8+ {[%mdl 64] Double Attack} Kc7 20. Qa7+ (20. Qxa6 Qe4+ {[%mdl 64] Double Attack} 21. f3 Qc6 $14) 20... Kd8) 18. Kg1 (18. f3 $18 Qg6 19. Bc1 (19. bxc3 $2 fxg5 20. Rfd1 Rg8 $19)) 18... fxg5 19. bxc3 Qg6 (19... Ne5 $16) 20. Qf3 $18 Rc8 21. Nf5 Ne5 22. Qe4 Rc4 23. Qa8+ {[%mdl 64] Double Attack} Kd7 24. Qxh8 Qxf5 {[#]} 25. f4 $2 (25. Qa8 $1 $18) 25... gxf4 $14 26. Rxa6 Rc8 $2 {[%mdl 8192]} (26... Qe4 $14) 27. Rxf4 $2 (27. Ra7+ $18 {and the rest is easy.} Kc6 28. Rxf4) 27... Nf3+ $16 28. Rxf3 {[%mdl 64] Remove Defender} Qxf3 {[%mdl 4096] Endgame KQR-KQR} 29. Ra7+ ({But not} 29. Qxh7 $6 Qe3+ 30. Kf1 Qf3+ 31. Kg1 Qe3+ 32. Kf1 Qf3+ 33. Kg1 $11) 29... Rc7 30. Rxc7+ Kxc7 31. Qxh7 {KQ-KQ} Qe3+ 32. Kg2 Qe2+ 33. Kh3 Qe6+ 34. Kh4 Kc6 35. h3 $2 (35. Qh5 $18) 35... Qe7+ $1 $11 {The position is equal.} 36. Kg4 {Strongly threatening Qf5.} Qe2+ 37. Kf4 Qe5+ 38. Kg4 Qe2+ 39. Kf4 Qe5+ 40. Kg4 Qe2+ 41. Kh4 Qe7+ 42. Kh5 {Threatens to win with Qf5.} Qe5+ {[%mdl 64] Double Attack} 43. Kg4 Qe2+ 44. Kf4 {Black must now prevent Qe4+.} Qe5+ 45. Kg4 Qe2+ 46. Kf4 {Qe4+ is the strong threat.} Qe5+ 47. Kg4 {Accuracy: White = 47%, Black = 60%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "8"]
[White "Bolanos, Fernando"]
[Black "Pichot, Alan"]
[Result "0-1"]
[ECO "C77"]
[WhiteElo "2231"]
[BlackElo "2581"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,118,46,8,8,-18,-22,-33,-38,-39,-32,-87,-89,-75,-36,-25,-23,-29,-36,-33,-28,-32,2,-81,-83,-70,-19,-19,-19,-15,-16,-118,-119,-110,-116,-114,-54,-57,-69,-108,-89,-95,-95,-93,-82,-85,-81,-98,-85,-85,-85,-112,-115,-112,-87,-79,-73,-128,-128,-121,-93,-77,-45,-110,-112,-123,-123,-231,-143,-568,-275,-299,-294,-682,-620,-618,-617,-658,-636,-714,-535,-29962,-29965,-6518,-2397,-29973,-29973,-29973,-29974,-29975,-29976,-29982,-29976,-29978,-29979,-29979,-29980,-29980,-29981,-29980,-29978]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 d6 6. c3 Bd7 7. Nbd2 g6 8. O-O Bg7 9. Re1 O-O 10. Nf1 Nh5 {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines} (10... Qe8 11. Bb3 Nh5 12. h3 Na5 13. Bc2 f5 14. d4 Nc6 15. dxe5 dxe5 16. Ne3 f4 17. Nd5 Rc8 18. b4 {½-½ (60) Karthikeyan,M (2605)-Puranik,A (2524) Manavgat 2018}) 11. d4 {LiveBook: 3 Games} exd4 12. Nxd4 (12. cxd4 {seems wilder.} Bg4 13. Bxc6 bxc6 14. Be3 Rb8 15. Rc1) 12... Nxd4 $146 {The position is equal.} ({Predecessor:} 12... b5 13. Nxc6 Bxc6 14. Bb3 Rb8 15. f3 Re8 {½-½ (15) Garcia Luque,A (2425)-Rizouk,A (2467) Dos Hermanas 2002}) 13. cxd4 Bxa4 14. Qxa4 Re8 15. g4 (15. d5 $15) 15... Nf6 $17 16. f3 Nd7 17. Be3 c5 18. Rad1 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 19. Qa3 {[%cal Rd4c5]} Qe7 20. Bf2 Rec8 21. e5 {[#]} (21. f4 $11) 21... b4 $1 $36 {[%cal Rb4a3][%mdl 2048] Black has strong initiative.} 22. Qb3 cxd4 (22... dxe5 $15 23. dxc5 Nxc5 24. Qxb4 Bf8) 23. Rxd4 $11 dxe5 ({Don't blunder} 23... Bxe5 $2 24. f4 $18) 24. Qxb4 Qe6 25. Qd6 (25. b3 $11 {keeps the balance.}) 25... Qxa2 $17 26. Qd5 Qxd5 ({And not} 26... Qxb2 27. Rd2 $16) 27. Rxd5 Rc7 (27... Nf8 $17 28. Bg3 Rab8 29. Bxe5 Bxe5 30. Rexe5 Rxb2) 28. Red1 $15 Nf8 29. Ra5 Rb7 30. Rd6 Rxb2 31. Rdxa6 Rxa6 32. Rxa6 Ne6 33. Be3 Rb3 34. Kf2 Bf8 35. Ra5 Rb2+ 36. Kg1 Bd6 37. Nd2 Bb4 38. Rd5 (38. Ra8+ $142 Kg7 39. Nc4) 38... Bxd2 $17 39. Rxd2 {[%mdl 4096] Endgame KRB-KRN} Rb3 40. Kf2 Kg7 41. Re2 (41. g5 $15) 41... f5 42. Bc1 Nc5 {White must now prevent ...Nd3+.} 43. Kg3 (43. Kg2 $17) 43... Nd3 44. Rc2 $2 {[%mdl 8192]} (44. Bg5 $17 {is more resistant.}) 44... Ne1 (44... f4+ $142 45. Kh4 Ne1 46. Rc7+ Kg8) 45. Rc7+ $19 {[#]} Kf6 $1 46. g5+ $2 (46. Rc6+ Kf7 47. Kf2 Nxf3 48. gxf5) 46... Ke6 47. Kf2 Nxf3 48. Rxh7 f4 49. Rh3 {[#]} Nd2 $1 {[%mdl 512]} 50. Rxb3 (50. Bxd2 Rxh3) 50... Nxb3 {KB-KN} 51. Bb2 Kf5 (51... e4 $142 52. Ke2 Kf5) 52. h4 Nc5 {Black mates.} 53. Ke2 e4 54. Bc3 Nd3 55. Ba5 Ne5 56. Bc7 Nf3 57. h5 gxh5 58. g6 Nd4+ 59. Kf2 Ne6 {Accuracy: White = 32%, Black = 60%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "9"]
[White "Flores, Diego"]
[Black "Delgadillo, Adonay"]
[Result "1-0"]
[ECO "A49"]
[WhiteElo "2609"]
[BlackElo "2218"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,89,63,52,62,47,62,50,79,62,62,68,72,68,79,68,68,62,71,69,79,75,87,88,85,68,66,80,72,69,94,97,137,131,122,114,112,93,132,84,138,140,137,93,106,100,134,122,190,206,220,194,221,204,311,280,631,619,683,351,351,351,351,351,348,343,337,337,29998,29999]} 1. Nf3 Nf6 2. g3 g6 3. b3 d6 4. d4 Bg7 5. Bb2 O-O 6. Bg2 Nbd7 7. O-O Ne4 8. c4 {A49: 1 d4 Nf6 2 Nf3 g6 3 g3: Anti-King's Indian systems} c6 9. Nfd2 Nxd2 10. Qxd2 e5 11. dxe5 Nxe5 12. Nc3 {LiveBook: 5 Games} Qa5 13. Rad1 Be6 14. Qc1 $146 ({Of course not} 14. Qxd6 Nxc4 15. bxc4 Bxc3 $15) ({Predecessor:} 14. Ne4 Qxa2 15. f4 Nxc4 16. bxc4 Qxb2 17. Qxb2 Bxb2 18. Nxd6 Rab8 19. Rd3 {0-1 (37) Graeber,R (2132)-Souleidis,G (2383) Oberhausen 1999}) 14... Rfd8 15. Qa1 f5 16. e3 Rd7 17. Ne2 Re8 18. Bc3 Qc7 19. Rd2 a5 20. Rfd1 a4 21. h3 axb3 22. axb3 Bf8 23. Kh2 Nf7 24. Bf6 Be7 25. Bb2 Rdd8 26. Qc1 Qa5 27. Qc2 Bf8 28. Ra1 Qc7 29. Qc3 Qe7 30. Rad1 Bc8 (30... Bh6 $142) 31. b4 $16 Ne5 32. f4 Nf7 33. Rd3 $36 {[%mdl 2048] Black is under strong pressure.} Qc7 34. Ng1 {[%cal Be2g1,Bg1f3,Bf3d4,Bd4c6][%mdl 32]} Re6 (34... Qe7 $16 {was called for.}) 35. Nf3 $18 h6 36. Ra1 Rde8 37. b5 Bd7 (37... Qe7 {was worth a try.} 38. Ra3 cxb5 39. cxb5 g5) 38. Nd4 R6e7 $2 (38... Re4 39. Bxe4 fxe4) 39. Ra7 Qb6 {[#]} 40. Rxb7 $1 {[%mdl 512]} Qxb7 41. bxc6 Bxc6 42. Nxc6 ({Not} 42. Bxc6 Qc8 $18) 42... Rxe3 43. Rxe3 Rxe3 {[#]} 44. Qf6 $1 {[%cal Rf6g6]} ({Weaker is} 44. Qxe3 Qxb2 45. h4 h5 $16) 44... Re2 $2 (44... Ne5 $18) 45. Qxg6+ {Accuracy: White = 79%, Black = 48%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "9"]
[White "Pichot, Alan"]
[Black "Vera Siguenas, Deivy"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2581"]
[BlackElo "2483"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,78,47,49,50,25,27,43,52,83,49,48,30,38,44,41,22,30,29,43,31,30,23,55,57,58,59,55,57,62,68,58,19,46,48,45,33,44,29,23,19,15,8,8,8,8,8,8,8,8,8,14,0,0,0,0]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 c5 6. Be3 cxd4 7. Nxd4 Ne7 8. c4 Nbc6 9. Qa4 {B12: Caro-Kann: Advance Variation} a6 10. Nc3 dxc4 11. O-O-O Bd3 (11... Qa5 12. Qxa5 Nxa5 13. Nxf5 Nxf5 14. Bb6 Nc6 15. f4 Rc8 16. Bxc4 Bb4 {1-0 (35) Sevian,S (2620)-Nisipeanu,L (2687) Tbilisi 2017}) 12. Bxd3 cxd3 13. Rxd3 Qa5 {LiveBook: 3 Games} ({Not} 13... b5 $2 14. Ndxb5 Qxd3 15. Nc7+ Kd8 16. Nxa8 $18) 14. Qxa5 Nxa5 15. f4 Rd8 16. Rhd1 Nac6 17. a3 $146 (17. Ne4 {with more complications.} Nb4 18. Rb3 Ned5 19. Bd2 Nxa2+ 20. Kb1) 17... Nxd4 18. Rxd4 Rxd4 19. Bxd4 Nc6 20. Bb6 Be7 21. Ne4 h6 22. Bc5 g5 23. g3 {[%cal Bg2g3,Bg3f4][%mdl 32]} gxf4 24. gxf4 Rg8 25. Bxe7 Kxe7 $14 {[%mdl 4096] Endgame KRN-KRN} 26. Nf6 Rd8 27. Rxd8 Kxd8 {KN-KN} 28. Kd2 Nd4 29. Ke3 Nf5+ 30. Kf3 b5 31. Kg4 Ke7 32. Kh5 Kf8 $1 {The position is equal.} 33. Nd7+ Kg7 $1 34. Nc5 a5 35. Nb7 a4 36. Nd6 Ne3 37. Nxb5 {aiming for Nc3.} Nd1 38. h4 Nxb2 39. Kg4 Nc4 {Accuracy: White = 64%, Black = 69%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "9"]
[White "Cruz, Cristhian"]
[Black "Delgado Ramirez, Neuris"]
[Result "*"]
[ECO "E11"]
[WhiteElo "2564"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "28"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,22,18,25,14,18,11,32,25,37]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. a3 Bxd2+ 6. Qxd2 d6 7. Nc3 {E11: Bogo-Indian} Nc6 (7... O-O 8. g3 Nbd7 9. Bg2 e5 10. b3 exd4 11. Nxd4 Nb6 12. Ndb5 Nfd7 13. Qc2 a4 14. b4 Nxc4 {1-0 (54) Lysyj,I (2668)-Najer,E (2681) Sochi 2016}) 8. e4 O-O {LiveBook: 7 Games} 9. Bd3 e5 10. d5 Nb8 11. O-O Na6 {Predecessor:} 12. Bc2 $146 Bd7 13. b3 Qe7 14. Ne1 h6 {Mary,P (2302)-Horwitz,D (2295) ICCF email 2016} *

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "9"]
[White "Cruz, Cristhian"]
[Black "Delgado Ramirez, Neuris"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2564"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,53,12,22,15,22,20,28,19,29,30,34,25,45,0,33,12,14,0,0,0,0,0,0,0,9,-36,-47,-39,0,-35,-16,-19,-4,-385,29,-97,-50,-25,-29,-23]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. a3 Bxd2+ 6. Qxd2 d6 7. Nc3 {E11: Bogo-Indian} Nc6 (7... O-O 8. g3 Nbd7 9. Bg2 e5 10. b3 exd4 11. Nxd4 Nb6 12. Ndb5 Nfd7 13. Qc2 a4 14. b4 Nxc4 {1-0 (54) Lysyj,I (2668)-Najer,E (2681) Sochi 2016}) 8. e4 O-O {LiveBook: 7 Games} 9. Bd3 {The position is equal.} e5 10. d5 Nb8 11. O-O Na6 12. Bc2 Bg4 $146 ({Predecessor:} 12... Bd7 13. b3 Qe7 14. Ne1 h6 {Mary,P (2302)-Horwitz,D (2295) ICCF email 2016}) 13. Ne1 c6 14. Nd3 Rc8 15. f4 exf4 16. Qxf4 Bh5 17. dxc6 bxc6 18. e5 dxe5 19. Nxe5 Qb6+ 20. Rf2 Rce8 {[#] Strongly threatening ...Rxe5!} 21. h3 Bg6 22. Bxg6 hxg6 23. Raf1 Nc5 24. Kh2 $2 {[%mdl 8192] [#]} (24. Qd4 $11 {and White stays safe.}) 24... Qc7 $2 (24... Nh5 $19 25. Qd4 Qb8) 25. Ng4 (25. Nxg6 $1 $11 Qxf4+ 26. Nxf4) 25... Qxf4+ 26. Rxf4 Nxg4+ 27. Rxg4 {Accuracy: White = 41%, Black = 26%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "9"]
[White "Gonzalez Vidal, Yuri"]
[Black "Bacallao Alonso, Yusnel"]
[Result "1/2-1/2"]
[ECO "E14"]
[WhiteElo "2562"]
[BlackElo "2583"]
[Annotator "TA"]
[PlyCount "42"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,42,0,0,0,0,0,7,0,0,0,0,0,0,-36,8,8,5,8,0,0,29,0,154]} 1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 Bb7 5. O-O d5 6. b3 Bd6 7. c4 O-O 8. Nc3 Nbd7 9. Bb2 a6 10. Rc1 dxc4 11. bxc4 c5 12. a4 {E14: Queen's Indian: Classical Variation (4 e3)} (12. d5 exd5 13. Nxd5 b5 14. Nxf6+ Nxf6 15. Qc2 Bxf3 16. gxf3 b4 17. f4 h6 18. Kh1 Re8 19. Rg1 Bf8 {½-½ (33) Vaganian,R (2594)-Miroshnichenko,E (2593) Antwerp 2008}) 12... cxd4 13. exd4 e5 $146 {[#] Strongly threatening ...e4.} ({Predecessor:} 13... Qc7 14. h3 Rfd8 15. Qe2 Rac8 16. Ne4 Bxe4 17. Bxe4 Bf4 18. Rc2 Nxe4 19. Qxe4 Nf6 {½-½ (35) Bell,I (2321)-Grayland,S (2365) ICCF email 2016}) 14. d5 Nc5 {White must now prevent ...e4.} 15. Re1 Re8 {And now ...e4 would win.} 16. Ng5 Bc8 17. Bb1 h6 18. Nge4 Nfxe4 19. Nxe4 Nxe4 20. Bxe4 a5 21. Bb1 Bf8 $2 (21... Bd7 $11) 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "9"]
[White "Martinez Alcantara, Jose Eduardo"]
[Black "Granda Zuniga, Julio E"]
[Result "1/2-1/2"]
[ECO "A20"]
[WhiteElo "2541"]
[BlackElo "2641"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,45,9,0,30,14,18,24,33,23,26,10,17,13,15,19,7,8,21,0,16,0,16,13,3,0,27,29,29,27,20,0,0,0]} 1. c4 e5 2. g3 Nf6 3. Bg2 Bc5 4. d3 O-O 5. Nf3 Nc6 6. O-O {A20: English Opening: 1...e5} d5 7. cxd5 Nxd5 8. Nc3 {LiveBook: 16 Games} Nde7 (8... Re8 9. Bg5 Nxc3 10. bxc3 f6 11. Bc1 Be6 12. Bb2 Bb6 13. d4 Bd5 14. Qc2 exd4 15. cxd4 {½-½ (56) Carlsen,M (2835)-Caruana,F (2832) London 2018}) 9. b3 $146 ({Predecessor:} 9. Bd2 a6 10. Rc1 Ba7 11. a3 h6 12. b4 Bg4 {1-0 (34) Ginsburg,M (2372)-Bady,G (2185) Miami 2007}) 9... a6 10. Bb2 Ba7 11. Rc1 Re8 12. Ne4 f6 13. a3 Be6 14. b4 Qd7 15. Qc2 Rad8 16. Rfd1 Nf5 17. Nc5 Bxc5 $1 18. Qxc5 Qf7 19. Re1 Rd7 20. Nd2 Nfe7 21. Qc2 Bd5 22. Nf3 Red8 23. Qb1 {Precision: White = 64%, Black = 60%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.09"]
[Round "9"]
[White "Abarca Gonzalez, Nicolas"]
[Black "Perez Ponsa, Federico"]
[Result "1/2-1/2"]
[ECO "E92"]
[WhiteElo "2416"]
[BlackElo "2560"]
[Annotator "TA"]
[PlyCount "40"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,40,0,0,0,0,14,7,0,0,0,0,0,1,-15,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. O-O-O Na6 {[%cal Bb8a6,Ba6c5,Bc5e6][%mdl 32]} 11. Ne1 Nc5 12. f3 {E92: King's Indian: Classical: 6 Be2 e5: 7 dxe5, 7 Be3 and Petrosian System without 7...Nbd7} c6 13. Nc2 Ne6 (13... a5 14. b3 Nfd7 15. Rd2 f5 16. Rhd1 Nf6 17. Rd6 Ne6 18. Bh4 fxe4 19. fxe4 g5 {0-1 (37) Shukh,N (2429)-Kuzubov,Y (2628) St Petersburg 2010}) 14. Be3 Bf8 {LiveBook: 5 Games. The position is equal.} 15. b3 $146 Bc5 16. Bxc5 Nxc5 17. Rd2 a5 18. Kb2 Be6 19. Rhd1 Kf8 20. Rd6 Ke7 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "10"]
[White "Granda Zuniga, Julio E"]
[Black "Pichot, Alan"]
[Result "1/2-1/2"]
[ECO "B47"]
[WhiteElo "2641"]
[BlackElo "2581"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,112,6,0,25,20,37,22,22,20,31,22,36,18,41,8,23,0,8,12,27,27,22,24,24,23,40,14,15,15,14,14,15,8,0,0,0,0,14,17,23,16,31,18,28,10,10,11,11,0,14,14,14,14,63,14,14,0,65,0,13,0,15,0,0,0,13,-41,-23,-27,13,13,13,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7,0,-7,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. g3 a6 7. Bg2 Nf6 8. O-O Be7 9. b3 O-O 10. Bb2 {LiveBook: 8 Games} Nxd4 {B47: Sicilian: Taimanov: 5 Nc3 Qc7 6 f4, 6 g3 and 6 Be2} (10... d6 11. Kh1 {½-½ (11) Shanava,K (2532)-Wojtaszek,R (2620) Dresden 2007}) 11. Qxd4 e5 12. Qd3 d6 13. Nd1 $146 ({Predecessor:} 13. a4 b6 14. f4 Bb7 15. Nd5 Nxd5 16. exd5 f5 17. c4 e4 18. Qe3 {0-1 (30) Nozdrachev,V (2328)-Shkuran,D (2437) Obninsk 2008}) 13... b5 14. Ne3 Rd8 15. Rfc1 Be6 16. a4 Qb6 17. a5 Qa7 18. Bc3 {[%cal Bb2c3,Bc3d2,Bd2e3][%mdl 32]} Ng4 19. Nxg4 Bxg4 20. Bd2 Be6 21. Be3 Qd7 22. c4 (22. f4 $5 {[%cal Rf4f5]} Bh3 23. Bxh3 Qxh3 24. Bb6 $11) 22... bxc4 23. bxc4 Rdc8 24. Bf1 Rc6 25. Qb3 Rac8 26. Ra4 Bd8 27. Rca1 h6 28. Rb4 Kh7 29. h4 h5 30. Kh2 g6 31. Bd3 Kg8 32. Qa2 Qc7 33. Qe2 Rb8 ({Don't go for} 33... Bxc4 $2 34. Rxc4 Rxc4 35. Bb6 $18) 34. Bb6 Qc8 {[%cal Rd8b6]} 35. Rab1 Rb7 36. Qe3 {[#] Bxd8 is the strong threat.} Be7 37. Qe2 (37. R1b2 $11) 37... Bd8 $14 38. Qe3 ({Better is} 38. R4b2 $1 $14) 38... Kh7 39. Qe2 Kg7 40. R4b2 Bxb6 41. Rxb6 Rbc7 42. c5 (42. Qd2 $11) 42... Rxc5 $15 43. Rxa6 d5 (43... Qd8 {seems wilder.} 44. Qe1 Rc3 45. Rd1 Ra3 46. Be2 Rc2) 44. exd5 {The position is equal.} Rxd5 {Threatens to win with ...Bg4.} 45. Rxe6 (45. Be4 {is more complex.} Bg4 46. Qa2 Rd4 47. Ra8 Qe6 48. Qa3) 45... Qxe6 46. Bc4 {[#]} Rxc4 $1 {[%mdl 512]} 47. Qxc4 {Black must now prevent Ra1.} Rxa5 48. Qxe6 fxe6 $11 {[%mdl 4096] Endgame KR-KR} 49. Kg2 Kf6 50. Kf3 Ra3+ 51. Ke4 Ra4+ 52. Ke3 Kf5 53. Rb8 Ra3+ 54. Ke2 Ra2+ 55. Ke3 Ra3+ 56. Ke2 Ra2+ {Precision: White = 52%, Black = 55%.} 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "10"]
[White "Delgado Ramirez, Neuris"]
[Black "Flores, Diego"]
[Result "1-0"]
[ECO "C00"]
[WhiteElo "2623"]
[BlackElo "2609"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,91,-7,-2,-16,-8,-40,-35,-32,34,31,32,24,71,18,64,13,58,45,60,61,55,66,70,57,91,97,90,95,90,100,87,101,80,90,220,232,241,220,196,198,222,232,223,222,196,164,273,259,249,268,257,256,241,239,314,325,375,382,406,403,472,466,510,510,513,521,424,427,656,650,1214,1211,2287,2130,2106,1446]} 1. e4 c5 2. Nf3 e6 3. g3 Nc6 4. Bg2 Nf6 5. Qe2 d5 6. d3 Be7 7. O-O b6 8. c3 {C00: French: Unusual White 2nd moves} (8. Nbd2 Bb7 9. Re1 Qc7 10. Nf1 dxe4 11. dxe4 Nd4 12. Nxd4 cxd4 13. e5 Nd7 14. Bxb7 Qxb7 15. Qg4 h5 16. Qxd4 Nc5 17. h4 Rd8 {0-1 (47) Christiansen,J (2495)-Harikrishna,P (2744) Riadh 2017}) 8... Ba6 9. e5 Nd7 {LiveBook: 4 Games} 10. h4 {The position is equal.} h6 11. h5 Qc7 {[%cal Rd7e5]} 12. Re1 O-O-O ({Better is} 12... O-O $15) 13. a4 $146 ({Predecessor:} 13. Na3 c4 14. d4 Rde8 15. b4 Nd8 {1-0 (47) Bulmaga,I (2388)-Visanescu,D (2036) Calimanesti Caciulata 2017}) 13... c4 14. d4 Na5 15. Bf4 (15. b4 $16 Nb3 16. Ra2) 15... Kb8 16. Nbd2 (16. b4 $14 Nb3 17. Ra2) 16... Bb7 17. Reb1 g5 18. hxg6 fxg6 19. b3 g5 20. Be3 $1 Nf8 21. bxc4 dxc4 22. Rb5 Bd5 23. Rab1 {Black must now prevent Rxa5.} Ka8 24. Ne1 Qc6 25. Qh5 Rg8 (25... Bxg2 $16 {might work better.} 26. Nxg2 Nd7) 26. Qf7 $18 ({But not} 26. Qxh6 Bxg2 27. Nxg2 Nd7) 26... Ng6 {[#] With the idea ...Bxg2.} 27. Rxd5 $1 {[%mdl 512]} exd5 {[#]} (27... Rxd5 28. Qxg8+) 28. Rb5 $1 {[%cal Rb5d5]} Rgf8 {[#]} 29. Qxd5 $1 {[%mdl 512]} Qxd5 (29... Rxd5 30. Bxd5) 30. Bxd5+ Kb8 31. Ng2 Ba3 (31... Kc7 $142 32. Be4 Rg8) 32. Be4 Rg8 33. Rxa5 bxa5 34. Nxc4 Bf8 35. Nxa5 Ne7 36. c4 Bg7 37. f4 gxf4 38. gxf4 Rdf8 39. d5 {White is clearly winning.} Nf5 40. Nc6+ Kb7 41. Bxf5 Rxf5 42. Ne7 Rff8 (42... Rgf8 $142 43. Nxf5 Rxf5) 43. c5 {[%cal Bc4c5,Bc5c6][%mdl 32]} h5 44. c6+ Ka6 45. Nxg8 Rxg8 46. d6 {Precision: White = 76%, Black = 33%.} 1-0

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "10"]
[White "Flores, Diego"]
[Black "Martinez Alcantara, Jose Eduardo"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "2609"]
[BlackElo "2541"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,58,33,32,27,20,25,26,63,51,47,35,50,0,0,0,25,25,21,0,21,17,32,10,29,11,23,16,18,0,0,0,150,-304,-293,-302,-302,-299,-295,-29997,-231]} 1. Nf3 c5 2. e3 Nf6 3. d4 e6 4. Bd3 d5 5. c3 Bd6 6. O-O O-O 7. Nbd2 Nbd7 8. Re1 Qc7 9. e4 cxd4 10. cxd4 dxe4 11. Nxe4 {LiveBook: 19 Games} Bb4 {D05: Colle System with ...e6} (11... Be7 12. Bg5 Qd8 13. Ne5 Nxe4 14. Bxe7 Qxe7 15. Nxd7 Bxd7 16. Bxe4 Qd6 17. Rc1 Rab8 18. Re3 Rfd8 19. Rec3 {½-½ (56) Khatoev,E (2338)-Goganov,A (2560) Samara 2013}) 12. Bd2 Bxd2 13. Qxd2 b6 {White has an edge.} 14. Rac1 Qb8 15. Ne5 Bb7 16. Nxf6+ $146 ({Predecessor:} 16. Ng5 Qd6 17. Qc2 g6 18. Qa4 Kg7 19. Bc4 {0-1 (43) Ankit,R (2194)-Thejkumar,M (2441) Nagpur 2008}) 16... Nxf6 17. Re3 {[#] Rg3 is the strong threat.} Qd8 18. Rce1 Nd5 19. Rg3 {Qh6 would kill now.} f5 20. Bc4 Rc8 21. Bb3 (21. b3 {with more complications.} Qe7 22. Nd3 Qf6 23. Bxd5 Bxd5 24. Nf4) 21... Rc7 22. Nf3 $40 {[%mdl 128] Hoping for Ng5. Black needs to defend precisely.} Qd6 23. h4 Re7 {[%cal Bc7e7,Be7e6,Be6e1][%mdl 32]} 24. Qg5 h6 25. Qd2 Nf6 ({Black should play} 25... Kh7 $11) 26. Rxe6 $2 (26. Qxh6 $16 Qxg3 27. Rxe6 gxh6 28. Rxe7+ {[%mdl 64] Discovered Attack} (28. fxg3 $2 {too greedy.} Rxe6 29. Bxe6+ Kg7 $19) 28... Bd5 29. fxg3) 26... Rxe6 $19 27. Qxh6 {[%csl Gh6][%cal Rg3g7]} Rf7 {Threatens to win with ...Bxf3.} 28. Ne5 Bd5 29. Nxf7 $2 {[#]} (29. Qh8+ $19 Kxh8 30. Nxf7+ Kh7 31. Nxd6 Rxd6 32. Rd3) 29... Re1+ {Accuracy: White = 32%, Black = 50%.} 0-1

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "10"]
[White "Bacallao Alonso, Yusnel"]
[Black "Henriquez Villagra, Cristobal"]
[Result "1/2-1/2"]
[ECO "B70"]
[WhiteElo "2583"]
[BlackElo "2488"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,61,6,4,14,10,12,3,5,12,29,13,31,33,39,35,43,43,43,39,35,49,49,39,40,37,49,33,37,0,33,0,32,0,51,0,46,0,45,0,41,0,47,49,32,-4,39,36,52,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. g3 g6 7. Nxc6 {B70: Sicilian Dragon: 6 g3 and 6 Be2 (without a later Be3)} bxc6 8. Bg2 {LiveBook: 3 Games} Qc7 9. b3 {The position is equal.} Bg7 {Strongly threatening ...Nxe4!} 10. Bb2 O-O 11. O-O Bb7 $146 ({Predecessor:} 11... Ba6 12. Re1 Rad8 13. Qd4 e5 14. Qd2 Nd7 {½-½ (58) Wang,H (2722)-Wojtaszek,R (2727) Douglas 2018}) 12. Na4 Rad8 13. Qe2 e5 14. Rad1 Rfe8 15. Rfe1 Nd7 16. Bc3 Bh6 17. Bd2 Bxd2 18. Rxd2 Nf8 19. Qe3 Bc8 20. Red1 Bg4 21. Re1 Bc8 22. Red1 Bg4 23. Re1 Bc8 24. Red1 Bg4 25. Bf3 Bc8 26. Bg2 Bg4 27. Bf3 Bc8 28. Qc3 Ne6 29. Qe3 Nf8 30. Nb2 f5 31. Bg2 {Accuracy: White = 55%, Black = 79%.} ({White should play} 31. exf5 $14 Bxf5 32. c4) 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "10"]
[White "Cruz, Cristhian"]
[Black "Gonzalez Vidal, Yuri"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2564"]
[BlackElo "2562"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,59,9,6,20,17,14,8,8,8,9,8,9,2,52,57,52,53,52,49,52,60,65,58,56,41,66,73,73,35,31,29,39,41,35,31,41,-384]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. Qa4+ Nc6 8. e3 O-O {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4)} 9. Bd3 dxc4 10. Bxc4 Bxc3+ 11. bxc3 Bd7 12. O-O Rfd8 13. Qa3 {LiveBook: 5 Games} Qe7 (13... b6 {is interesting.} 14. Qb2 Na5 15. Ba6 c5 16. Ne5 Be8) 14. Qxe7 Nxe7 15. Rab1 b6 {[#]} 16. Rfc1 $146 ({Predecessor:} 16. Ne5) 16... c5 17. dxc5 bxc5 18. Rb7 {[#] And now Ne5 would win.} Nd5 19. Bxd5 $1 exd5 20. Rc7 Rac8 21. Rxa7 Ra8 22. Rc7 c4 23. Rc2 Bf5 24. Rb2 Rdb8 25. Rxb8+ Rxb8 26. h3 Rb1+ 27. Kh2 Rb2 28. Nd4 {White is slightly better.} Be4 29. Kg3 Rxa2 30. Kh2 $2 {[%mdl 40960] Accuracy: White = 62%, Black = 66%. . An unexpected result.} (30. Rc8+ $14 {stays ahead.} Kh7 31. Rd8) 1/2-1/2

[Event "IV Zicosur Open 2019"]
[Site "Antofagasta"]
[Date "2019.01.10"]
[Round "10"]
[White "Perez Ponsa, Federico"]
[Black "Vera Siguenas, Deivy"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2560"]
[BlackElo "2483"]
[Annotator "TA"]
[PlyCount "161"]
[EventDate "2019.01.05"]
[EventType "swiss"]
[EventCountry "CHI"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,161,74,82,101,101,97,80,81,64,117,116,136,87,162,124,160,128,114,108,109,101,112,108,99,83,91,97,83,91,94,85,114,113,214,59,106,106,109,84,105,105,114,106,114,114,114,114,114,114,124,114,138,138,138,138,142,142,142,142,142,142,142,142,142,109,109,110,132,110,113,110,110,110,132,110,110,110,138,110,110,85,138,110,110,0,138,138,138,138,138,138,156,113,113,113,113,107,107,0,113,107,107,104,135,113,113,113,127,120,127,100,130,130,118,104,130,117,107,111,508,451,1364,1364,2538,2745,3710,3452,5731,2457,2606,2202,2880,1074,2689,2882,29976,29977,29977,29978,29977,29978,11413,6516,29979,29977]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Ne7 6. c3 h6 7. O-O Nd7 8. a4 {B12: Caro-Kann: Advance Variation} (8. Nbd2 c5 9. dxc5 Nxc5 10. Nd4 Nd7 11. Nxf5 Nxf5 12. Bd3 Ne7 13. Nf3 Nc6 14. Re1 Qc7 15. Qe2 g5 {0-1 (50) Karjakin,S (2773)-Mamedyarov,S (2801) Saint Louis 2018}) 8... Bh7 9. a5 a6 {[#]} 10. b4 $1 {LiveBook: 6 Games. White is better.} Ng6 11. Ne1 Be7 12. Bd3 $146 ({Predecessor:} 12. Nd3 O-O 13. f4 f6 14. Bg4 f5 15. Be2 Nh8 {1-0 (34) Huschenbeth,N (2596)-Basso,P (2460) Bastia 2017}) 12... O-O 13. Qc2 f5 (13... b6 $14) 14. f4 Rf7 15. Nd2 {[%cal Bb1d2,Bd2b3,Bb3c5][%mdl 32]} Qc7 (15... Ngf8 $16) 16. Nb3 Kh8 17. Nc5 Nxc5 18. dxc5 Rg8 19. Nf3 Nf8 20. Nd4 g5 21. Kh1 gxf4 22. Bxf4 Bg5 23. g3 {[%cal Bg2g3,Bg3f4][%mdl 32]} Rfg7 24. Rae1 Qd7 25. Qd2 Ng6 (25... Qe7 $16 {was worth a try.}) 26. Nf3 $2 (26. Bxg5 $18 hxg5 {[#]} 27. Bxf5 $1 {[%mdl 512]} exf5 28. e6 (28. Nxf5 Nf4 $14)) 26... Bxf4 27. gxf4 Nf8 28. Rg1 Bg6 29. Nd4 Be8 30. Qf2 Rxg1+ 31. Rxg1 Rxg1+ 32. Kxg1 Ng6 33. Qg3 Kh7 34. Kf2 Qf7 35. Be2 Ne7 36. Ke3 Bd7 37. Qh4 Kg7 38. Bh5 Qf8 39. Kd3 Bc8 40. Ne2 Bd7 41. Ng3 Ng8 42. Bf3 Kh7 43. Nh5 Kg6 44. Kd4 Bc8 45. Ng3 Kh7 46. Bh5 Bd7 47. Ne2 Bc8 48. Ng1 Bd7 49. Nf3 Kg7 (49... Qe7 $142) 50. Qg3+ Kh8 51. Qh4 Kg7 $1 52. Kd3 Qe7 53. Qg3+ Kh8 54. Nd4 Qg7 55. Nc2 Qxg3+ 56. hxg3 $16 {[%mdl 4096] Endgame KBN-KBN} Ne7 57. Ne3 Kg7 58. Nc2 ({White should try} 58. Ke2 $16) 58... Bc8 (58... Kh8 $1 $11 {remains equal.}) 59. Nd4 Bd7 60. Ke3 Bc8 61. Kf3 Bd7 62. Kg2 Bc8 63. Kh3 Bd7 64. Kh4 Bc8 65. Ne2 Bd7 66. Nc1 Bc8 67. Nd3 Bd7 68. Nb2 Kh7 $2 {[%mdl 8192]} (68... Kf8 $16) 69. Na4 $18 Nc8 (69... Ng6+ $142 70. Bxg6+ Kxg6) 70. Nb6 Nxb6 71. axb6 {KB-KB} Bc8 72. g4 Kg7 73. Be8 (73. gxf5 $142 exf5 74. Be2) 73... Kf8 74. Bg6 Kg7 75. Bh5 (75. gxf5 $142 exf5 76. Bh5) 75... Bd7 76. gxf5 exf5 77. Be2 Bc8 78. Kh5 Kh7 79. Bf1 Kg7 80. Bd3 Kh7 {[#]} 81. e6 $1 {[%mdl 512] Accuracy: White = 45%, Black = 38%.} 1-0

