[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.1"]
[White "Obregon, Andres Carlos"]
[Black "Picollo, Pablo"]
[Result "1-0"]
[ECO "D42"]
[WhiteElo "2514"]
[BlackElo "1860"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,73,95,66,54,54,100,93,111,108,123,112,141,91,91,90,135,122,121,129,126,125,154,126,146,144,148,150,183,183,206,197,202,206,217,238,366,339,365,347,371,309,488,482,587,587,564,539,763,760,1217,1187,981,985]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 Nxd5 5. Nf3 Be7 6. e3 O-O 7. Bd3 c5 8. O-O cxd4 9. exd4 Nc6 10. Re1 b6 11. Nxd5 exd5 12. Bxh7+ {[%mdl 64] [#] Decoy} Kxh7 {B22: Sicilian: 2 c3} 13. Qc2+ {[%mdl 64] Double Attack} g6 {...Bd7 is the strong threat.} (13... Kg8 14. Qxc6 Bf5 15. Bf4 Rc8 16. Qb7 Bb4 17. Re3 Rc2 18. a3 Bd6 19. Qxd5 Bxf4 20. Qxf5 {1-0 (53) Erwich,F (2346)-Van Meegen,R (2239) Netherlands 2018}) 14. Qxc6 Be6 {White is better.} 15. Bf4 Bf6 16. Be5 $146 ({Predecessor:} 16. Rac1 Rc8 17. Qb5 Qd7 18. Qb3 Rxc1 19. Rxc1 Rc8 20. Re1 {1-0 (42) Iounoussov,M (2022)-Horn,C (1944) Ruhrgebiet 2004}) 16... Kg7 17. Rac1 Rc8 18. Qb7 Qd7 19. Bxf6+ Kxf6 20. Qxd7 Bxd7 21. Ne5 Bf5 22. f3 Rfe8 23. g4 Be6 24. Kg2 Kg7 25. b3 a5 26. Kg3 f6 27. Nd3 Rxc1 28. Rxc1 ({Much less strong is} 28. Nxc1 $6 Bf7 $16) 28... Rc8 (28... Bf7 {was called for.} 29. g5 fxg5) 29. Rxc8 $18 Bxc8 {[%mdl 4096] Endgame KB-KN} 30. Nf4 Bb7 31. Ne6+ Kh6 (31... Kg8 {keeps fighting.} 32. f4 Kh7) 32. h4 {White is clearly winning.} g5 33. f4 gxh4+ 34. Kxh4 b5 35. a3 b4 36. axb4 axb4 37. Nc5 {Accuracy: White = 91%, Black = 16%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.2"]
[White "Yantorno, Jorge"]
[Black "Hungaski, Robert"]
[Result "0-1"]
[ECO "C45"]
[WhiteElo "1857"]
[BlackElo "2505"]
[Annotator "TA"]
[PlyCount "26"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,26,23,12,27,-41,-47,-125,-116,-197,-201,-210,-192,-265,-256]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Be3 Qf6 6. c3 Nge7 7. Nc2 Bb6 8. Nba3 O-O {C45: Scotch Game} 9. Nc4 (9. Bxb6 $11 axb6 10. Bc4) (9. Nb5 Qe5 10. Bxb6 axb6 11. Qe2 Na7 12. Nbd4 c5 13. Nf3 Qe6 14. g3 Nac6 15. Ng5 Qg6 16. f4 {½-½ (56) Skoberne,J (2501)-Szabo,K (2520) Budapest 2008}) 9... Qg6 $146 ({Predecessor:} 9... Bxe3 10. N4xe3 Rd8 11. Bc4 d6 12. O-O Qg6 13. Bd3 Ne5 14. f4 Nxd3 15. Qxd3 b6 {½-½ (27) Skolarczyk,M (1586)-Skotny,A Gora Sw Anny 2011}) 10. Nd2 (10. Nxb6 $15 axb6 11. f3) 10... d5 $17 11. Qe2 (11. Qf3 $17 {was called for.}) 11... dxe4 $19 12. Bxb6 axb6 13. Nxe4 (13. h4 $142) 13... Re8 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.3"]
[White "Tristan, Leonardo"]
[Black "Gimenez, Dante"]
[Result "1-0"]
[ECO "A45"]
[WhiteElo "2504"]
[BlackElo "1856"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,76,34,46,-2,-19,-2,40,-11,-3,-29,22,13,61,62,86,27,45,48,52,43,62,56,54,59,88,69,70,45,73,45,43,18,161,157,201,204,201,139,224,204,241,237,222,225,229,223,225,201,285,291,233,216,231,204,466,470,519,530,735,703,702,766,734,712,2108,1940,1581]} 1. d4 Nf6 {[%cal Bg8f6,Bf6e4,Be4d6,Bd6f5][%mdl 32]} 2. Bg5 Ne4 3. Bf4 d5 4. f3 Nd6 5. Nc3 e6 6. e4 {[%cal Be2e4,Be4e5][%mdl 32] A45: Trompowsky Attack} c6 {LiveBook: 17 Games} 7. e5 (7. Bd3 b5 8. Nh3 Be7 9. O-O O-O 10. Bxd6 Qxd6 11. e5 Qc7 12. Ne2 c5 13. c3 b4 {½-½ (58) Andreikin,D (2712)-Mamedyarov,S (2799) Huaian 2017}) 7... Nf5 8. Qd2 {The position is equal.} Bb4 $146 ({Predecessor:} 8... c5 9. dxc5 Bxc5 10. O-O-O Bd7 11. Bd3 Ne7 12. Nge2 Qb6 13. Kb1 a5 14. a4 Na6 15. Bb5 Bc6 16. Nd4 {½-½ (16) Eybl,A (2260)-Fuchs,G (2242) Austria 2006}) 9. a3 (9. g4 $14 Nh4 10. O-O-O) 9... Be7 $11 10. Nge2 b5 (10... O-O $142) 11. Ng3 g6 12. Nxf5 gxf5 13. h4 ({Better is} 13. Bd3 $16) 13... Rg8 14. Ne2 {[%cal Bc3e2,Be2f4,Bf4h5,Bh5f6][%mdl 32]} Nd7 15. Bg5 Bb7 16. Bxe7 Qxe7 17. Nf4 a5 18. Bd3 Kd8 19. Qe2 Kc7 20. g4 fxg4 21. fxg4 Nf8 (21... h6 $11 {and Black is okay.}) 22. Nh5 $18 Kb6 23. Nf6 Rh8 24. Qe3 Nd7 (24... c5 $16 25. Qg5 Qc7) 25. Rf1 (25. Nxh7 $6 c5 $16) 25... b4 26. axb4 axb4 27. Rxa8 Rxa8 28. Qg5 ({Don't take} 28. Bxh7 $6 Ra1+ 29. Ke2 Ba6+ 30. Bd3 Rxf1) 28... Nxf6 29. Qxf6 Qxf6 (29... Ra1+ $142 30. Ke2 Qxf6 31. Rxf6 b3) 30. Rxf6 {[%mdl 4096] Endgame KRB-KRB} Ra1+ 31. Kd2 Rg1 {[#]} 32. g5 $1 ({Not} 32. Rxf7 Rxg4 33. Rxh7 Rxd4 $14) 32... Rg4 $2 (32... Ba6 33. Bxh7 Rg4) 33. Rxf7 {White is clearly winning.} Rxd4 34. Rxh7 c5 35. Ke3 Rg4 36. Kf3 Rg1 37. Kf2 Rh1 38. g6 c4 {Precision: White = 65%, Black = 33%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.4"]
[White "Gras, Carlos"]
[Black "Alonso, Salvador"]
[Result "0-1"]
[ECO "D77"]
[WhiteElo "1856"]
[BlackElo "2497"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,61,-12,20,20,10,17,12,12,8,13,11,0,38,25,27,27,27,22,41,33,36,35,81,9,10,18,6,14,46,11,12,0,12,0,0,-17,0,0,0,0,0,0,0,0,0,-83,0,-953,-945,-881]} 1. Nf3 Nf6 2. g3 g6 3. Bg2 Bg7 4. O-O O-O 5. d4 d5 6. c4 dxc4 7. Ne5 Nfd7 (7... c5 {looks sharper.} 8. d5 Nbd7 9. Nxc4 b5 10. Ne3 Bb7) 8. Nxc4 {D77: Fianchetto Grünfeld: 6 0-0: Replies other than 6...c6} Nb6 9. Nxb6 axb6 10. d5 {The position is equal.} Nd7 {[%cal Bb8d7,Bd7c5,Bc5a4][%mdl 32]} 11. Nc3 Nc5 12. Bf4 $146 ({Predecessor:} 12. Bg5 h6 13. Be3 Kh7 14. Rc1 Bd7 15. Bd4 e5 16. dxe6 Bxe6 17. Bxg7 Kxg7 {½-½ (29) Negulescu,A (2395)-Ftacnik,L (2540) Warsaw 1987}) 12... e5 13. Bd2 Bd7 14. b4 Na4 15. Qb3 Qe7 16. Ne4 {aiming for Bg5.} h6 17. Rac1 c6 {[#]} 18. Nc3 (18. b5 $1 $16) 18... Nxc3 $11 19. Bxc3 cxd5 20. Bxd5 Rfd8 21. e4 Ba4 22. Qb2 Bc6 23. Bxc6 bxc6 24. Rcd1 Rxd1 25. Rxd1 Qe6 26. a3 b5 27. Kg2 h5 28. h4 Qc4 29. Kf3 (29. f3 $11 {remains equal.}) 29... f5 ({Black should play} 29... Kh7 $17) 30. exf5 $2 {[%mdl 8192]} (30. Kg2 $11) 30... Qg4+ $19 {[%mdl 64] [#] Double Attack} 31. Kg2 {Accuracy: White = 40%, Black = 63%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.5"]
[White "Ricardi, Pablo"]
[Black "Rodriguez Vargas, Sergio"]
[Result "1-0"]
[ECO "B08"]
[WhiteElo "2485"]
[BlackElo "1853"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,105,22,44,44,58,55,33,43,42,42,104,106,111,113,105,110,109,114,191,189,191,169,155,135,151,122,138,123,130,130,134,126,122,121,159,130,137,137,129,118,134,123,141,121,142,103,175,142,142,143,168,168,184,182,184,170,358,358,359,359,354,358,354,349,336,315,331,318,318,312,5581,5189,29953,29955,29954,29957,29954,29959,29956,29959,29957,29949,29961,29947,29965,29964,29965,29966,29960,12833,6291,7539,29966,29972,29947,29951]} 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. h3 Nf6 5. Nc3 O-O 6. Be2 e5 7. dxe5 {B08: Pirc Defence: Classical System} (7. O-O Nc6 8. Be3 exd4 9. Nxd4 Bd7 10. f4 Re8 11. Bf3 a6 12. Qd2 Rb8 13. Rae1 Na5 14. Bf2 b5 15. b3 c5 16. Nde2 b4 17. Nd5 Nxd5 18. exd5 {½-½ (33) Sebag,M (2476)-Sadhwani,R (2451) chess.com INT 2019}) 7... dxe5 8. Qxd8 Rxd8 9. Bg5 {White is slightly better.} Re8 10. O-O-O a6 $146 {[#]} (10... Nc6 $14) ({Predecessor:} 10... c6 11. Nd2 b5 12. a4 b4 13. Na2 a5 14. Rhe1 Nfd7 {1-0 (43) Thorhallsson,S (2092)-Fjallheim,L (1919) Uppsala 2018}) 11. Nxe5 $1 $16 Nxe4 12. Nxe4 Bxe5 13. Rhe1 Kg7 14. Bc4 Nd7 (14... Nc6 $16) 15. f4 $18 h6 16. fxe5 hxg5 17. Nxg5 {Strongly threatening e6.} Rxe5 18. Nxf7 Rxe1 19. Rxe1 Nb6 20. Bb3 Bd7 21. Ne5 Re8 22. Kd2 Ba4 23. Nd3 Rxe1 24. Kxe1 $16 {[%mdl 4096] Endgame KBN-KBN} Bc6 25. Kf2 Kf6 26. g4 a5 27. a3 Nd7 28. Kg3 Be4 (28... g5 $16) 29. Nf2 Bc6 30. h4 Nc5 31. Bc4 b5 32. Be2 b4 33. g5+ Kf5 $2 (33... Ke5 {might work better.} 34. axb4 axb4) 34. axb4 $18 axb4 35. Bd3+ Nxd3 36. Nxd3 {KB-KN} b3 37. cxb3 Ke4 38. Nf4 Be8 39. b4 c6 40. Ne6 Kd3 $2 (40... Ke5) 41. Nc7 Bf7 42. b5 cxb5 43. Nxb5 Bb3 44. Kf4 Kc4 45. Nc3 Kd4 46. Ne4 Bc2 47. Nd2 Bd3 48. Nf3+ Kd5 49. Ne5 Bc2 50. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} Bb1 51. b5 Kc5 {[#]} 52. Nxg6 $1 {[%mdl 512]} Bxg6 53. Ke5 {Accuracy: White = 91%, Black = 44%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.6"]
[White "Palladino, Alberto"]
[Black "Villanueva, Mario"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "1849"]
[BlackElo "2482"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,100,0,0,-6,-12,35,-65,-30,-53,-58,-249,-245,-265,-277,-262,-222,-251,-191,-204,-154,-161,-161,-152,-151,-153,-149,-170,-155,-208,-199,-203,-215,-281,-269,-341,-314,-337,-329,-345,-331,-414,-401,-410,-406,-433,-430,-549,-544,-536,-535,-518,-517,-496,-475,-741,-735,-684,-535,-699,-630,-625,-618,-693,-678,-691,-693,-701,-695,-682,-682,-807,-810,-1529,-1522,-1580,-1229,-1835,-1916,-29983,-29984,-29984,-29984]} 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Nc6 6. a3 Bd7 7. b4 cxd4 8. cxd4 Rc8 9. Be2 Nge7 10. O-O Nf5 11. Bb2 h5 {C02: French: Advance Variation} (11... Be7 12. Kh1 h5 13. Nc3 Na5 14. Na4 Qc6 15. Nc5 Nc4 16. Bc1 b6 17. Nxd7 Kxd7 18. Bd3 Kc7 19. g3 Kb7 {0-1 (57) Areshchenko,A (2684)-Vidit,S (2602) Abu Dhabi 2014}) 12. Qd2 Be7 13. Rd1 {[#]} (13. Bc3 $14) 13... g5 $1 $15 {[%mdl 512] Black is slightly better.} 14. Nc3 (14. Nxg5 Ncxd4) 14... g4 15. Na4 $146 (15. Bd3 $1 $15) ({Predecessor:} 15. Ne1 Qd8 16. Nc2 Bg5 17. Qe1 Nce7 18. Bd3 Nh4 19. Ne3 Neg6 20. Nb5 Bxb5 21. Bxb5+ {0-1 (40) Grosar,A (2442)-Tukmakov,V (2572) Bled 2001}) 15... Qd8 $19 16. Ne1 Bg5 17. Qd3 Nxe5 18. Qb3 Nc4 19. Nc5 Nxb2 20. Qxb2 b6 21. Nxd7 Qxd7 22. a4 Kf8 23. Nd3 Qc7 24. a5 (24. Ne5 $17) 24... Qc2 25. axb6 {[#] Strongly threatening b7.} axb6 {aiming for ...Qxb2.} 26. Ra8 {Hoping for Qxc2.} Kg7 {White must now prevent ...Qxb2.} 27. Rxc8 Rxc8 ({Less strong is} 27... Qxc8 28. b5 $17) 28. Qxc2 Rxc2 29. Bf1 Nxd4 30. Ne5 Ne2+ 31. Bxe2 Rxe2 {[%mdl 4096] Endgame KRB-KRN} 32. Nc6 Rc2 33. Nb8 Be7 34. Na6 Rb2 35. h3 gxh3 36. gxh3 Bxb4 37. Rd3 (37. Nxb4 $142 Rxb4 38. Rd3) 37... Bd6 38. Rc3 Ra2 39. Nc7 Bc5 40. Rf3 Kg6 41. Ne8 f5 42. Nc7 Kf6 43. h4 Ra7 44. Nb5 Ra4 45. Rh3 Ra2 46. Rf3 e5 47. Nc3 Rd2 48. Kf1 e4 49. Ke1 exf3 50. Kxd2 Bb4 {Accuracy: White = 28%, Black = 82%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.7"]
[White "Acosta, Pablo Ismael"]
[Black "Iovaldi, Sebastian"]
[Result "1-0"]
[ECO "D03"]
[WhiteElo "2467"]
[BlackElo "1848"]
[Annotator "TA"]
[PlyCount "43"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,43,0,8,8,14,14,12,34,29,68,77,85,88,132,69,130,32,197,188,227,210,217,137,491,474,755,754,716,714]} 1. d4 Nf6 2. Nf3 g6 3. Bg5 Bg7 4. Nbd2 d5 5. e3 O-O 6. Bd3 c5 7. c3 Nc6 8. O-O Qb6 9. Rb1 Nd7 {D03: 1 d4 d5 2 Nf3 Nf6 3 Bg5, including Torre Attack with early ...d5} (9... e5 10. Nxe5 Nxe5 11. dxe5 Ng4 12. Nf3 Nxe5 13. Nxe5 Bxe5 14. f4 Bf6 15. Bxf6 Qxf6 16. f5 Qe5 17. Rf3 Bd7 {½-½ (17) Sedlak,N (2552)-Markus,R (2630) Hungary 2018}) 10. b4 cxd4 11. cxd4 {Black must now prevent b5.} Re8 $146 {The position is equal.} ({Predecessor:} 11... h6 12. b5 Nxd4 13. Bxe7 Re8 14. Ba3 Nc5 15. Bxc5 Nxf3+ 16. Qxf3 Qxc5 17. Nb3 {0-1 (39) Ivanova Skripova,T (2121)-Matveeva,S (2380) Chakvi 2015}) 12. Qb3 e6 13. Rfc1 f6 14. Bf4 Kh8 15. e4 (15. Bg3 $16) 15... e5 (15... f5 $14) 16. dxe5 ({White should try} 16. exd5 $16 Nxd4 17. Nxd4 exf4 18. Ne6) 16... fxe5 $2 (16... Ndxe5 $14 17. Bxe5 (17. exd5 Nxd3 18. Qxd3 Bf5 $14) 17... Nxe5) 17. exd5 {[#] Strongly threatening Nc4.} exf4 18. dxc6 bxc6 19. Re1 $40 {[%mdl 128] White goes for the king.} Ne5 $2 {[%mdl 8192]} (19... Rf8 $16 {is a better chance.} 20. Qc2 Qd8) 20. Nxe5 $18 {White is clearly winning.} Bxe5 {[#]} (20... Rxe5 $142 21. Nc4 (21. Rxe5 Bxe5 22. Re1 Qc7 $18) 21... Qc7 22. Nxe5 Bxe5) 21. Rxe5 $1 {[%mdl 512]} Rxe5 22. Qc3 {Accuracy: White = 56%, Black =  2%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.8"]
[White "Leguizamon, Arnaldo"]
[Black "Slipak, Sergio"]
[Result "0-1"]
[ECO "E18"]
[WhiteElo "1848"]
[BlackElo "2427"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,72,0,-3,-19,0,0,4,-27,-23,-43,-36,-97,7,-2,70,71,31,0,-10,-18,-19,0,0,-27,0,0,12,-72,-72,-69,-75,-166,-175,-181,-164,-166,-164,-198,-189,-252,-254,-258,-238,-271,-270,-557,-534,-735,-683,-663,-640,-664,-645,-642,-637,-775,-772]} 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O e6 5. d4 Be7 6. c4 O-O 7. Nc3 Na6 8. Re1 d5 {E18: Queen's Indian: Old Main Line (4 g3 Bb7 5 Bg2 Be7 6 0-0 0-0 7 Nc3)} (8... Ne4 9. h4 d6 10. Nxe4 Bxe4 11. Ng5 Bxg2 12. Kxg2 h6 13. Nf3 c5 14. d5 exd5 15. Qxd5 Nc7 16. Qf5 {½-½ (74) Sargissian,G (2689)-Oparin,G (2613) St Petersburg 2018}) 9. Ne5 c5 {LiveBook: 7 Games} 10. Nb5 $146 ({Predecessor:} 10. cxd5 exd5 11. Bf4 Ne4 12. Nxe4 dxe4 13. dxc5 Nxc5 14. Nc4 Ne6 15. Bd6 Rc8 16. b3 b5 17. Bxe7 Qxe7 18. Qd6 Qf6 19. Ne3 Rfd8 20. Qa3 Nd4 21. Bf1 Qb6 {1-0 (52) Konopka,M (2416)-Dervishi,E (2581) Germany 2014}) 10... Nb4 {The position is equal.} 11. dxc5 bxc5 12. a3 Nc6 13. Bf4 Qb6 14. Qc2 (14. e4 $15) 14... d4 ({Better is} 14... Nxe5 $17 15. Bxe5 d4 16. Bxb7 Qxb7) 15. Nd3 $11 {[#] And now Bc7 would win.} Ne8 (15... e5 $11 16. Nxe5 (16. Bxe5 Nxe5 17. Nxe5 Bxg2 $17) 16... Nxe5 17. Bxb7 Qxb7 18. Bxe5 Rad8) 16. b4 $1 $14 {[%cal Rb4c5]} cxb4 17. axb4 Nxb4 18. Nxb4 {Bxb7 is the strong threat.} Bxg2 19. Kxg2 {aiming for Na6.} Bxb4 20. Reb1 Qc6+ 21. Kg1 Bc5 22. Qd3 {[#]} (22. Be5 $1 $11 {remains equal.}) 22... f6 $1 $17 23. Bd2 ({Not} 23. Nxd4 $2 Bxd4 24. Qxd4 e5 $19) 23... e5 24. Qf5 (24. Bb4 $17) 24... a6 $19 25. Na3 Nc7 26. Nc2 Ne6 27. Ra5 Rfb8 28. Rba1 (28. Ne1 {is a better defense.}) 28... Rb2 29. Bc1 Rb3 30. Bd2 Be7 31. R1a4 $2 (31. R5a2) 31... g6 {Black is clearly winning.} 32. Qg4 f5 33. Qh3 Rb2 34. Ra2 Rxa2 35. Rxa2 Qxc4 36. Qg2 Rb8 {Precision: White = 29%, Black = 67%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.9"]
[White "Saldano Dayer, Horacio"]
[Black "Baudel, Simon"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2422"]
[BlackElo "1836"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,79,35,35,77,84,83,72,65,69,68,75,104,102,117,98,100,100,97,99,150,141,152,161,143,143,147,132,477,472,722,722,722,712,690,672,641,637,645,645,633,640,604,594,649,434,635,637,965,952,984,981,968,967,944,926,999,983,979,977,975,943,5085,1648]} 1. Nf3 b6 2. c4 Bb7 3. Nc3 f5 4. g3 Nf6 5. Bg2 e6 6. O-O Bb4 7. Qc2 O-O 8. a3 Bxc3 9. Qxc3 Ne4 10. Qc2 Ng5 $146 {A10: English Opening: Unusual Replies for Black} ({Predecessor:} 10... c5 11. b4 Na6 12. b5 Nc7 13. d3 Nf6 14. a4 a6 15. Bf4 d6 16. a5 axb5 17. axb6 Rxa1 18. Rxa1 {1-0 (31) Miladinovic,L (2168)-Nestorovic,K (2046) Zemun 2017}) 11. Nxg5 Bxg2 {[#]} 12. Nxe6 $1 dxe6 {White is better.} 13. Kxg2 e5 14. b4 Nd7 15. Bb2 c5 16. bxc5 bxc5 17. Bc3 Qc7 18. Rab1 h5 (18... Rae8 $142) 19. Qd3 $16 {Threatens to win with Qd5+.} Nb6 {[#]} 20. Qf3 $1 g6 21. Kg1 e4 22. Qe3 Nxc4 $2 {[%mdl 8192]} (22... Rac8 $16 {is tougher.} 23. Qg5 (23. Qh6 Qh7 $16) 23... Kh7) 23. Qh6 $18 {White is clearly winning.} Qh7 (23... Ne5 $142 24. f4 exf3 25. exf3 Rf6) 24. Qxh7+ Kxh7 25. Rb7+ Kh6 26. Bg7+ {[%mdl 64] Double Attack} Kg5 27. h4+ Kg4 28. Bxf8 Rxf8 {[%mdl 4096] Endgame KRR-KRN} 29. Kg2 {White threatens f3+ and mate.} f4 30. f3+ exf3+ 31. exf3+ Kf5 32. Rc1 Nxd2 33. Rxc5+ Ke6 34. Rb2 Rd8 35. Rcc2 Nxf3 36. Kxf3 fxg3 37. Kxg3 Rd3+ 38. Kg2 Rxa3 39. Rc6+ Kd7 40. Rxg6 {Accuracy: White = 90%, Black = 25%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.20"]
[Round "1.10"]
[White "Fuxz, Diego"]
[Black "Perez, Maximiliano"]
[Result "0-1"]
[ECO "A21"]
[WhiteElo "1832"]
[BlackElo "2418"]
[Annotator "TA"]
[PlyCount "108"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,108,0,8,-31,-12,-12,-7,-31,-21,-48,-49,-63,-42,-57,-53,-63,-65,-85,-25,-23,-31,-116,12,0,0,6,13,-8,0,-37,0,-4,0,-20,0,-60,-71,-77,-89,-141,-122,-137,-152,-140,-44,-239,-105,-98,-112,-110,-85,-72,-79,-160,-150,-152,-78,-172,-129,-145,-143,-145,-53,-177,-37,-21,-7,-84,0,-55,0,-66,-53,-97,-91,-83,-78,-29989,-29984,-29987,-29988,-29991,-29992,-29993,-29994,-29994,-29995,-29995,-29996,-29996,-29995,-29997,-307]} 1. g3 g6 2. c4 Bg7 3. Bg2 e5 4. Nc3 f5 5. e3 Nf6 6. Nge2 O-O 7. O-O d6 8. d3 a5 9. Rb1 c6 10. f4 {A21: English Opening: 1...e5 2 Nc3} Be6 11. b3 (11. a3 Nbd7 12. b4 axb4 13. axb4 d5 14. cxd5 cxd5 15. Qd2 Bf7 16. Bb2 Re8 17. Rfe1 Qb6 18. d4 e4 19. b5 Bf8 {0-1 (37) Short,N (2678)-McShane,L (2640) Riadh 2017}) 11... Na6 12. h3 {The position is equal.} exf4 13. exf4 Re8 14. Kh2 Bf7 15. d4 $146 ({Predecessor:} 15. Qd2 d5 16. Rd1 d4 17. Na4 Rc8 {0-1 (32) Patriarca,L (2300)-Milos,G (2515) Asuncion 1992}) 15... d5 16. c5 Ne4 17. Bb2 Nb8 (17... Qe7 $17) 18. Ng1 $11 Nd7 19. Nf3 (19. Qd3 $15) 19... h6 (19... Nxc3 $17 20. Bxc3 Nxc5 $1 {[%mdl 576] Pin}) 20. Ne5 Nxe5 21. fxe5 Be6 22. Bxe4 dxe4 23. Bc1 Rf8 24. Na4 Qe7 25. Be3 g5 {Strongly threatening ...f4!} 26. Qe1 (26. Qh5 $11) 26... Rad8 $15 27. Rd1 h5 $1 28. Qd2 ({Avoid the trap} 28. Qxa5 $2 f4 $1 $19 {[%mdl 512]}) (28. Nc3 $142) 28... Bh6 $1 $17 29. Nc3 Kh8 $1 30. Qe2 Qe8 (30... f4 $17 31. Qxh5 Qh7 32. gxf4 gxf4) 31. Qg2 $2 (31. Bc1 $1 $15) 31... Qg6 (31... f4 $19 {has better winning chances.} 32. Bc1 e3) 32. Bc1 Rf7 33. Rf2 Rfd7 34. Ne2 {[#]} a4 $1 {[%mdl 512]} 35. Rdf1 (35. bxa4 $142 Bxa2 36. Be3) 35... axb3 36. axb3 Rf7 (36... Qh7 $142 {Hoping for ...Rg8.} 37. Rg1 Ra8) 37. b4 (37. h4 $17 {was worth a try.}) 37... Rg8 38. Nc3 Bc4 39. Re1 Qe6 (39... Rd8 $1 $17 40. Ne2 Qh7) 40. Rg1 ({Only move:} 40. g4 $1 $15) 40... Bd5 (40... Bd3 $19 {Threatens to win with ...Rff8.} 41. b5 Qc4) 41. Nxd5 $15 cxd5 42. Qf1 {[#]} (42. Ra2 $11) 42... Rff8 (42... f4 $1 $17 {[%mdl 512]}) 43. Qe2 (43. b5 $11) 43... Qe8 ({Better is} 43... Qf7 $1 $15) 44. Rgf1 ({White should try} 44. Qf1 $1 $11) 44... Qg6 45. Qa2 {[#]} f4 $1 $36 {[%mdl 2048] White must now prevent ...e3. Black is really pushing.} 46. Qxd5 e3 47. Rf3 $2 {[%mdl 8192]} (47. Bxe3 $17 fxe3 48. Rf6) 47... g4 {Black mates.} 48. Rxf4 Bxf4 49. Rxf4 Rxf4 50. gxf4 {KQR-KQB} Qc2+ 51. Qg2 g3+ 52. Kh1 Qxc1+ 53. Qg1 g2+ 54. Kh2 Qxg1+ $2 {Accuracy: White = 33%, Black = 43%.} (54... Qf1 {mates} 55. Qxf1 gxf1=Q 56. h4 Qg2#) 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.1"]
[White "Herrmann, Roman"]
[Black "Obregon, Andres Carlos"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2066"]
[BlackElo "2514"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,88,63,51,66,68,91,52,71,66,62,51,52,23,28,29,39,26,56,67,98,97,92,69,69,0,65,76,137,90,110,85,86,78,106,106,180,186,189,183,198,189,178,158,166,166,208,153,168,159,160,154,194,135,208,206,239,186,189,183,151,163,119,68,50,62,165,22,93,25,27,8,8]} 1. d4 Nf6 2. Nf3 g6 3. c4 Bg7 4. Nc3 O-O 5. e4 d6 6. h3 c5 7. d5 e6 8. Bd3 exd5 9. cxd5 a6 10. a4 Ne8 {A70: Modern Benoni: 6 e4 g6 7 Nf3} (10... Nbd7 11. Bf4 Qe7 12. O-O Nh5 13. Bh2 Ne5 14. Be2 Nxf3+ 15. Bxf3 Nf6 16. e5 dxe5 17. d6 Qe6 18. Re1 Nd7 19. Bd5 Qf6 20. Ne4 Qd8 21. Qc2 {½-½ (43) Prohaszka,P (2626)-Shimanov,A (2626) Saint Louis 2018}) 11. O-O Nd7 12. Be3 Qe7 {White is slightly better.} 13. a5 Rb8 14. Qe2 $146 ({Predecessor:} 14. Qd2 b5 15. axb6 Rxb6 16. Bh6 Bxh6 17. Qxh6 Ne5 18. Nxe5 Qxe5 19. Qd2 Nc7 {0-1 (29) Rakela Rodriguez,J (2039)-Lopez Silva,H (2413) Chile 2010}) 14... Nc7 15. Rfe1 b5 16. axb6 Rxb6 17. Bg5 f6 18. Be3 Ne5 19. Nxe5 fxe5 20. Na4 Rb8 21. Nc3 ({Better is} 21. Bc4 $14) 21... Qh4 (21... Rb6 $1 $11) 22. Qd2 $36 {[%mdl 2048] White is on the roll.} Qe7 (22... Bf6 $142) 23. Ra5 Rf7 24. Bc4 Qd8 25. Rea1 Kh8 26. R1a3 Rf4 (26... Bf6 $16) 27. Bxf4 $18 exf4 28. Qxf4 Rxb2 {...Rc2 would now be nice for Black.} 29. Qc1 Rb4 30. Bf1 Bd4 31. Nd1 Qe7 32. Rf3 ({Stronger than} 32. Bxa6 Nxa6 33. Rxa6 Bxa6 $11) 32... Kg7 33. Ra2 Nb5 34. Bxb5 Rxb5 35. Re2 (35. Nc3 $18) 35... Rb4 (35... Bd7 $16 36. Ra2 Rb6) 36. Ne3 Qxe4 37. Ng4 {White wants to mate with Qh6+.} Rb1 38. Rxe4 {White threatens Re7+ and mate.} Rxc1+ 39. Kh2 {Re7+ would kill now.} Bxg4 40. Re7+ ({But not} 40. Rxg4 $6 h5 $11) (40. hxg4 $16 Be5+ 41. g3) 40... Kh6 $1 $14 41. hxg4 Kg5 {[#]} (41... Rf1 $1 $14) 42. Rxh7 ({White should try} 42. Rf8 $1 $18) 42... Rc2 {[#]} (42... c4 $1 $11) 43. Rhf7 (43. Kh3 $1 $16) 43... c4 $1 $11 44. g3 {Hoping for R3f4.} c3 {[%mdl 32768] Accuracy: White = 59%, Black = 31%. . Loss on time!?} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.2"]
[White "Hungaski, Robert"]
[Black "Conde, Adrian"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2505"]
[BlackElo "2055"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,100,33,47,40,50,41,70,39,60,45,41,34,43,36,41,37,56,16,40,31,73,52,59,63,60,20,19,19,21,27,29,10,8,0,0,-17,0,0,0,0,19,6,30,8,29,27,62,71,57,63,58,60,93,0,0,-291,-274,-424,-377,-423,-422,-422,-421,-486,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. c4 Nf6 6. Nc3 Qc7 7. a3 b6 8. Be3 Bb7 9. f3 d6 10. Rc1 Nbd7 11. b4 Be7 12. Qd2 O-O 13. Be2 Rac8 14. O-O Rfe8 15. Kh1 {A31: Symmetrical English: 2 Nf3 Nf6 3 d4} Qb8 16. Rc2 (16. Rfd1 Bd8 17. Nb3 Bc7 18. Bf4 d5 19. Bxc7 Rxc7 20. cxd5 exd5 21. exd5 Nxd5 22. Nxd5 Bxd5 23. Nd4 b5 24. Bf1 Rxc1 25. Rxc1 {½-½ (40) Yu,Y (2738)-Karthikeyan,M (2578) Moscow 2017}) 16... Bd8 {LiveBook: 30 Games} 17. Rfc1 {White is slightly better.} Bc7 18. Bf1 $146 ({Predecessor:} 18. Bg1 d5 19. cxd5 exd5 {0-1 (125) Beltran de Heredia Eguiaz,M (1948)-Kovacevic,S (2426) Mostoles 2008}) 18... Rcd8 19. Nce2 (19. b5 $5 {[%cal Rb5a6]}) 19... h5 20. Qe1 Rc8 21. Bg1 Ne5 22. Qd2 h4 23. h3 Qa8 24. Nc3 Ng6 25. Nde2 Nd7 26. Bf2 Nde5 27. Na4 Nd7 28. c5 (28. Re1 {feels hotter.} Qb8 29. Rd1 Red8 30. Nd4 Re8 31. Be2) 28... bxc5 29. bxc5 Nxc5 30. Nxc5 dxc5 31. Rxc5 Rcd8 32. Qb2 Bd6 33. Ra5 Rb8 34. Qd2 Red8 35. Qe1 Be7 36. Nd4 {[%cal Be2d4,Bd4b3,Bb3c5][%mdl 32]} Bf6 37. Nb3 Rbc8 38. Nc5 Bd4 39. Bxd4 ({And not} 39. Bxh4 Nxh4 40. Qxh4 Be3 $17) 39... Rxd4 40. Rb1 Rc7 41. Qe3 e5 42. Qb3 (42. a4 $16) 42... Qd8 $11 43. Bc4 $2 {[%mdl 8192] [#]} (43. Nxa6 $11 {and White is okay.} Rcd7 44. Rc5) 43... Bc8 $19 44. Bd5 (44. Bf1 $142 Rc6 45. Nb7) 44... Nf4 45. Qb2 Nxd5 46. exd5 Rxd5 47. Qb6 {[#]} Rd1+ $2 (47... Bxh3 $1 $19 {[%mdl 512]} 48. Rg1 (48. gxh3 Rd1+) 48... Rd1 49. gxh3 Qd4 50. Rxd1 Qxd1+ 51. Kg2 Qe2+ 52. Kg1 Qe1+ 53. Kg2 Qg3+ 54. Kf1 Qxf3+ 55. Ke1 Qe3+ 56. Kd1 Rc8) 48. Rxd1 $11 {The position is equal.} Qxd1+ 49. Kh2 Qe1 50. Qxc7 {Strongly threatening Ne4.} Qg3+ {Precision: White = 59%, Black = 38%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.3"]
[White "Del Cuadro, Nestor"]
[Black "Tristan, Leonardo"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2062"]
[BlackElo "2504"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,82,7,7,-2,0,5,64,18,27,3,43,-88,-89,-129,-138,-116,-44,-41,-41,-77,-81,-60,-67,-48,-12,-12,0,-10,7,-22,-14,-8,18,-13,-13,-89,-89,-68,-86,-53,-91,-117,-72,-119,-106,-238,-225,-241,-217,-357,-365,-343,-344,-360,-339,-481,-472,-598,-593,-670,-664,-643,-641,-595,-581]} 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. c4 Be7 5. O-O O-O 6. d4 dxc4 7. Qc2 b6 8. Qxc4 Bb7 9. Nc3 Nbd7 10. Rd1 c5 11. Bg5 {E03: Open Catalan: 5 Qa4+ Nbd7 6 Qxc4} (11. Ne5 Bxg2 12. Kxg2 Qc8 13. Nxd7 Qxd7 14. dxc5 Qc6+ 15. f3 Qxc5 16. Qxc5 Bxc5 17. Bf4 Rfd8 18. e4 Ne8 {½-½ (41) Aronian,L (2794)-Mamedyarov,S (2809) Berlin 2018}) 11... Qc8 12. Rac1 Bc6 $146 ({Better is} 12... Rd8 $11) ({Predecessor:} 12... h6 13. Bxf6 Nxf6 14. dxc5 Bxc5 15. Qf4 Rd8 16. Ne5 Bxg2 17. Kxg2 Rxd1 18. Rxd1 {½-½ (60) Erdos,V (2577)-Bartel,M (2653) Katowice 2016}) 13. a3 {White is slightly better.} (13. e4 $5) 13... b5 14. Nxb5 {[%cal Rd4c5]} Nb6 (14... Qb7 $5 {[%cal Rc6b5]} 15. Nc3 cxd4 16. Qxd4 (16. Rxd4 Rac8 $11) 16... h6 17. Bxf6 Nxf6 $11) 15. Qb3 (15. Qc2 $1 $14 {stays ahead.} Bxb5 16. dxc5) 15... c4 $17 16. Rxc4 Nxc4 17. Qxc4 Qb7 ({Black should try} 17... Qa6 $1 $17 18. a4 Rac8 19. Bxf6 Bxf6) 18. Nc3 $15 Rab8 {Strongly threatening ...Rfc8.} 19. Bf4 Rbc8 20. Qa2 Nd5 21. Bd2 Nxc3 22. Bxc3 Bd5 23. Qa1 Rfd8 24. Ne1 Bxg2 25. Nxg2 Bg5 26. f3 Rd7 27. Rd3 {[#]} (27. Qb1 $11 {keeps the balance.}) 27... e5 $1 $36 {[%cal Re5d4][%mdl 2560] Keeping White busy.} 28. dxe5 Rxd3 29. exd3 Qxf3 30. Qf1 {[#]} Qxf1+ $1 31. Kxf1 {[%mdl 4096] Endgame KRB-KBN} Bc1 32. Nf4 {[#]} (32. a4 $17) 32... Rb8 $1 $19 33. Bd4 a6 34. Nd5 (34. Bc5 $142) 34... Bxb2 35. Ne7+ Kf8 36. Bc5 {aiming for Nc6+.} Ke8 37. d4 {[#]} (37. Nf5 {was called for.}) 37... Bxd4 $1 {[%mdl 512] Black is clearly winning.} 38. Bxd4 Kxe7 39. Ke2 Rb3 40. Bc5+ Ke6 41. Bf8 g5 {Accuracy: White = 22%, Black = 56%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.4"]
[White "Alonso, Salvador"]
[Black "Blanco, Marcos"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2497"]
[BlackElo "2053"]
[Annotator "TA"]
[PlyCount "109"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,109,19,12,22,18,10,12,12,36,37,72,59,60,53,97,57,74,60,84,66,64,64,64,69,67,67,65,66,86,67,62,65,81,36,80,52,186,184,198,198,200,193,195,184,208,208,208,208,218,200,218,197,199,206,196,190,214,214,220,218,264,281,281,249,299,300,307,307,492,492,499,496,498,503,483,407,503,501,525,512,558,534,518,477,585,578,602,587,658,562,1469,1344,1445,1334,1948,1853]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O O-O 7. Bb3 Bb6 8. Nbd2 Ne7 {[%cal Bc6e7,Be7g6,Bg6f4][%mdl 32]} 9. Re1 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} Ng6 10. Nf1 c6 11. Ng3 {The position is equal.} Bc7 (11... h6 12. h3 d5 13. exd5 Nxd5 14. d4 exd4 15. Nxd4 Be6 16. Nxe6 fxe6 17. Rxe6 Rxf2 18. Kh1 Nh4 19. Qg4 Qf8 20. Qxh4 {½-½ (20) Hou,Y (2652)-Aronian,L (2799) Tbilisi 2017}) 12. d4 Nf4 $146 ({Predecessor:} 12... Re8 13. dxe5 dxe5 14. Qxd8 Rxd8 15. Bg5 Bg4 16. Nf5 {½-½ (27) Nguyen,T (2442)-Landa,K (2601) Czech Republic 2016}) 13. h3 Be6 14. Bc2 Qd7 15. Ng5 Ng6 16. Be3 (16. a4 {looks sharper.} Bc4 17. b3 Ba6 18. Nf3 h6 19. Nf5) 16... Rfd8 17. dxe5 dxe5 18. Nxe6 fxe6 19. Qxd7 Rxd7 20. a4 Bb6 21. Nf1 Rad8 22. g3 Bxe3 23. Nxe3 Rd2 24. Kf1 Kf8 25. Re2 Ke7 {[#]} (25... Nh8 $14) 26. Nd5+ $1 $18 {[%mdl 512]} R8xd5 (26... cxd5 27. Rxd2) 27. exd5 Rxe2 {[#]} 28. d6+ $1 {[%mdl 512]} Kxd6 29. Kxe2 {[%mdl 4096] Endgame KRB-KNN} Ne7 30. Rd1+ Kc7 31. a5 Ned5 32. Kd2 c5 33. Bb3 Kc6 34. Re1 Kd6 35. Bc4 h6 36. Bf1 Nd7 37. Bg2 b5 38. axb6 axb6 39. Ra1 Nc7 40. c4 Nf6 41. Ra7 Nfe8 $2 (41... Nce8 {was worth a try.} 42. Ra8 Ke7) 42. Rb7 Kd7 {Now ...Nd6 and Black clings on.} 43. Rxb6 Nd6 44. Kc3 e4 45. Rb8 Nce8 46. Ra8 {White is clearly winning.} Ke7 47. Ra5 Nb7 48. Ra7 Ned6 49. Kc2 Kf6 {[#]} 50. Bxe4 $1 {[%mdl 576] Deflection} Nxe4 51. Rxb7 Nxf2 52. Rc7 Nxh3 53. Rxc5 Nf2 54. b4 Ne4 55. Rc7 {Accuracy: White = 65%, Black = 35%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.5"]
[White "Carcamo, Matias"]
[Black "Ricardi, Pablo"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2052"]
[BlackElo "2485"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,101,-19,-42,-16,-16,0,0,0,0,0,0,24,30,42,33,5,-4,2,7,54,-79,79,-10,101,0,0,0,0,0,0,-20,-22,-24,106,95,104,105,108,98,111,29,29,27,27,27,27,-8,-4,-33,38,0,0,0,43,0,0,0,0,0,6,2,7,0,0,0,20,27,25,-11,0,0,0,0,0,0,0,0,0,-654,98,0,0,-654,87,0]} 1. e4 c5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3 e6 6. f4 Nge7 7. Nf3 O-O 8. Be3 b6 9. O-O d5 10. Bf2 dxe4 {B24: Closed Sicilian: 3 g3 sidelines} 11. dxe4 Ba6 (11... e5 12. Nxe5 Nxe5 13. fxe5 Bxe5 14. Be3 Qxd1 15. Raxd1 Bg4 16. Rd2 Rad8 17. Rxd8 Rxd8 18. Bg5 {0-1 (39) Mammadova,G (2260)-Savchenko,B (2623) Baku 2010}) 12. Re1 Qxd1 {The position is equal.} 13. Rexd1 Rad8 $146 ({Predecessor:} 13... Bxc3 14. bxc3 Rad8 15. Bf1 Bb7 16. Rd3 Na5 17. Rad1 Rde8 18. Re1 {1-0 (34) Marwan,A (2079)-Wageih,K (2256) Tripoli 2010}) 14. e5 h6 15. Ne4 Nb4 16. Rxd8 Rxd8 17. Rc1 g5 18. fxg5 hxg5 19. Nfxg5 (19. Nf6+ $14 {stays ahead.} Bxf6 20. exf6) 19... Ng6 $2 {[#]} ({Not} 19... Nxa2 20. Ra1 $16) (19... Bxe5 $17 {keeps the pressure on.} 20. c3 Nd3) 20. a3 (20. Nf6+ $1 $16 Bxf6 21. exf6) 20... Nc6 (20... Nxc2 $1 $11 {keeps the balance.} 21. Nf6+ Bxf6 22. exf6 Nd4 23. Bxd4 Rxd4) 21. Nxf7 (21. Nf6+ $16 Bxf6 22. exf6) 21... Kxf7 $11 22. Ng5+ Ke7 23. Bxc6 Nxe5 24. Bg2 Ng4 25. Re1 Nxf2 (25... Bc8 $11 {remains equal.} 26. Bf3 Nxf2 27. Kxf2 Bxb2) 26. Nxe6 $16 {[%mdl 64] [#] Double Attack} Rd2 27. Nxg7+ Kf7 28. Nf5 Rxc2 29. b4 ({White should try} 29. Nd6+ $16 Kf6 30. Ne8+ Kg6 31. Re6+ Kf7 32. Rf6+ Kxe8 33. Bc6+ (33. Rxf2 Rc1+ 34. Bf1 Rb1 $11) 33... Ke7 34. Rxf2 Rc1+ 35. Kg2) 29... Nd3 $11 30. Nd6+ Kf6 31. Rb1 Ke5 32. Nf7+ Kd4 33. Nd6 Ke5 (33... c4 $15 34. b5 {[%mdl 64] Trapped Piece} c3 35. bxa6 Rb2 36. Nf5+ Kc5) 34. Nf7+ Ke6 35. Ng5+ Kf6 (35... Kf5 $5 {[%cal Rf5g5]} 36. Nf3 Nc1 $11) 36. Ne4+ Ke5 37. bxc5 bxc5 {...Rxg2+! is the strong threat.} 38. Ng5 Kd4 39. h4 {Hoping for h5.} c4 40. Nf3+ Kc5 $1 41. h5 {Black must now prevent Ng5.} c3 {Strongly threatening ...Re2.} (41... Re2 $5 {[%cal Rc4c3]} 42. Bf1 Re3 43. Bxd3 cxd3 $11) 42. Bf1 $1 Ra2 43. Ne1 c2 44. Nxc2 $1 Rxc2 45. h6 Ne5 {( -> ...Nf3+)} 46. Bxa6 Nf3+ 47. Kf1 {And now Rb5+ would win.} Nd2+ {[%mdl 64] Double Attack} 48. Ke1 $2 {[%mdl 8192]} (48. Kg1 $11 Nf3+ 49. Kf1 Nd2+ {[%mdl 64] Double Attack} 50. Kg1 Nf3+) 48... Nf3+ $2 (48... Nxb1 $19 49. Be2 Kd4) 49. Kf1 ({White should play} 49. Kd1 $16 Rh2 50. Rb5+ Kc6 51. Rf5 Rh1+ 52. Bf1 {[%mdl 64] Decoy} Rxf1+ 53. Ke2 {[%mdl 64] Double Attack}) 49... Nd2+ $2 {[%mdl 8192]} (49... Nh2+ $11 50. Ke1 Nf3+ 51. Kd1 Rh2) 50. Ke1 $19 Nf3+ $2 (50... Nxb1 $19 51. Be2 Kd4) 51. Kf1 {Accuracy: White = 41%, Black = 32%.} (51. Kd1 $16 Rh2 52. Rb5+ Kc6 53. Rb7) 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.6"]
[White "Villanueva, Mario"]
[Black "Sobrero, Sebastian"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2482"]
[BlackElo "2052"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,67,31,30,37,31,54,20,61,47,92,67,131,127,139,122,182,113,266,269,777,780,783,762,791,782,762,768,788,781,865,879,1050,1067,1063,1041,1429,1368,1370,1367,1479,1477,1641,1623,1556,1614,2910,2530,2903,2742,4264,3941,4200,3974,29975,29973,29962,11284]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e6 7. g4 Be7 {B81: Sicilian Scheveningen: Keres Attack} 8. g5 Nfd7 9. h4 Nc6 {The position is equal.} 10. Be3 Qc7 11. h5 Nxd4 $146 (11... b5 $14) ({Predecessor:} 11... Nce5 12. Qd2 b5 13. a3 Bb7 14. O-O-O Nb6 15. f4 {½-½ (37) Sjugirov,S (2657)-Dragun,K (2568) Yerevan 2015}) 12. Qxd4 $16 Rg8 13. O-O-O $36 {[%mdl 2048] White has strong initiative.} Ne5 (13... b5 $16) 14. h6 ({White should try} 14. f4 $18 Nc6 15. Qd2) 14... g6 $2 (14... gxh6 $16 {was called for.} 15. Rxh6 Ng4) 15. f4 $18 Nc6 $2 {[#]} (15... Ng4 16. Qg7 Rf8) 16. Qg7 $1 {[%cal Rg7g8][%mdl 512]} Rf8 (16... Rxg7 17. hxg7) 17. Qxh7 Bd7 18. Qg7 O-O-O 19. h7 Rh8 20. Qxf7 b5 21. Bh3 Rdf8 22. Qxg6 b4 23. Na4 Ne5 24. fxe5 Bxa4 25. Bxe6+ Kb8 26. Bb3 {[%cal Re5d6]} Bxb3 27. axb3 Rc8 28. Rd2 Qa5 29. Kb1 Qxe5 30. Bd4 Qf4 31. Rf2 Qg3 32. Qf7 Qxg5 33. Bxh8 Rxh8 34. Qc4 {Accuracy: White = 85%, Black = 21%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.7"]
[White "Salvatti, Diego"]
[Black "Acosta, Pablo Ismael"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2048"]
[BlackElo "2467"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,110,3,12,-25,-19,-2,-10,-25,20,19,12,-2,0,-4,0,0,0,0,0,0,0,0,0,0,0,0,34,27,42,38,62,12,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,-8,-8,-8,0,0,0,0,0,0,0,0,0,0,-8,0,0,0,0,0,-7,10,-176,-178,-903,-877,-594,-577,-627,-549,-577,-569,-697,-639,-29983,-29984,-29984,-29984,-29984,-4574,-1731,-1131,-1695,-1259]} 1. d4 Nf6 2. Bf4 e6 3. e3 b6 4. Nf3 Bb7 5. h3 g6 6. Bh2 Bg7 7. c4 O-O 8. Nc3 d6 9. Be2 Nbd7 10. O-O Qe7 11. Rb1 $146 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} ({Predecessor:} 11. Rc1 e5 12. dxe5 dxe5 13. Nd5 Nxd5 14. cxd5 Nc5 15. b4 Ne4 16. Qc2 f5 17. Qxc7 Qxc7 18. Rxc7 Bxd5 19. Bxe5 Bxe5 20. Nxe5 {½-½ (49) Matlakov,M (2689)-Bartel,M (2622) Berlin 2015}) 11... Ne4 12. Nxe4 Bxe4 13. Rc1 {The position is equal.} f5 14. Nd2 Bb7 15. Bf3 Bxf3 16. Qxf3 c5 17. Qc6 Rfc8 18. Qxd6 Qxd6 19. Bxd6 cxd4 20. exd4 Bxd4 21. b3 Rc6 22. Bh2 a5 23. Rfd1 Bc5 24. Nf3 Nf6 25. Ne5 Rcc8 26. Nd7 Nxd7 27. Rxd7 Rd8 28. Rcd1 Rxd7 29. Rxd7 $11 {[%mdl 4096] Endgame KRB-KRB} a4 30. Be5 axb3 31. axb3 Ra2 32. Rg7+ Kf8 33. Rxh7 g5 34. b4 Bxf2+ 35. Kf1 f4 36. Rb7 Be3 37. g4 Rf2+ (37... f3 $5 38. Rb8+ $8 Ke7 39. Rb7+ Kf8 40. Rb8+ Kf7 41. Rb7+ Kf8 $11) 38. Ke1 Rc2 39. Rb8+ Kf7 (39... Ke7 $5 40. Rb7+ $8 Ke8 41. Rb8+ Kf7 42. Rb7+ Kg8 43. Rb8+ Kh7 44. Rb7+ Kg8 45. Rb8+ Kf7 46. Rb7+ Kg8 $11) 40. Rb7+ Kg6 41. Rg7+ $1 Kh6 {[#] ( -> ...f3)} 42. Re7 Rxc4 43. Rxe6+ Kh7 44. Bf6 Kg6 {And now ...Kf7 would win.} 45. Be7+ $2 (45. Rd6 $11 {and White is okay.}) 45... Kf7 $19 46. Re5 $2 (46. Rxe3 fxe3 47. Bxg5) 46... Bd4 47. Rxg5 Kxe7 {KRB-KR} 48. Rf5 Rxb4 49. h4 Be3 50. h5 Rb2 51. g5 Ke6 52. Rf8 Ke5 53. g6 Rg2 (53... Ke4 $142 54. Re8+ Kd3 55. Rd8+ Bd4 56. Rxd4+ Kxd4 57. g7 Ke3 58. Kd1 Rg2 59. g8=B Rxg8 60. h6 f3 61. h7 Rh8 62. Kc1 f2 63. Kb2 f1=Q 64. Kc2 Qb5 65. Kc1 Rc8+ 66. Kd1 Qf1#) 54. h6 f3 {[%cal Rg2g1] [#]} 55. Kd1 Bxh6 {Accuracy: White = 43%, Black = 73%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.8"]
[White "Slipak, Sergio"]
[Black "Pascual, Diego"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2427"]
[BlackElo "2024"]
[Annotator "TA"]
[PlyCount "33"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,33,63,76,87,69,272,110,128,70,293,198,491,308,307,245,421,417]} 1. Nf3 f5 2. g3 Nf6 3. Bg2 g6 4. b3 d6 5. d4 Bg7 6. Bb2 Nc6 7. O-O e5 8. dxe5 Ng4 9. c4 O-O 10. Nc3 Ngxe5 {A87: Dutch Defence: Leningrad System: 5 Nf3} 11. Qd2 g5 $146 {[#]} (11... Nxf3+ $14 12. Bxf3 Be6) ({Predecessor:} 11... Nxf3+ 12. Bxf3 Be6 13. Rad1 Rb8 14. Nd5 Ne5 15. Bg2 a6 16. c5 Bxd5 17. Bxd5+ Kh8 18. cxd6 Qxd6 {1-0 (37) Gavrilov,A (2494)-Prasanna Raghuram,R (2455) Rethymno 2014}) 12. Rad1 (12. Nxg5 $18 {and the rest is easy.} h6 13. Bd5+ Kh8 14. Nh3) 12... f4 {White is better.} 13. c5 (13. gxf4 $16 gxf4 14. Kh1) 13... Qe8 $2 (13... dxc5 $14 14. Nxe5 Bxe5) 14. cxd6 Qh5 $2 (14... Nxf3+ 15. Bxf3 cxd6 16. gxf4 (16. Qxd6 Bh3 $16) 16... Bh3) 15. Ne4 cxd6 16. Qd5+ ({Resist} 16. Nxd6 Be6 $18) ({Much less strong is} 16. Nexg5 Nxf3+ 17. Nxf3 Bxb2 $18) 16... Kh8 $2 {[#]} (16... Qf7) 17. Qxd6 {Accuracy: White = 37%, Black = 15%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.9"]
[White "Villarreal, Hector"]
[Black "Saldano Dayer, Horacio"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2035"]
[BlackElo "2422"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,110,-30,18,16,23,-6,12,-11,2,-26,-22,-28,-28,-31,3,2,6,6,16,8,9,6,39,16,27,0,0,0,7,-31,-10,-36,-29,-17,5,8,19,8,81,0,0,-28,48,44,46,0,73,-9,16,-10,0,-7,-12,-29,-35,-76,-16,-72,0,-87,-87,-97,-98,-90,-91,-114,-5,-70,-55,-36,-29,-116,-111,-325,-329,-343,-221,-299,-292,-410,-367,-354,-326,-388,-381,-377,-352,-370,-355,-422,-411,-603,-602,-627,-604,-661,-658,-664,-532]} 1. Nf3 c5 2. g3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. Bg2 Bg7 6. c3 Nf6 7. O-O O-O 8. e4 {A49: 1 d4 Nf6 2 Nf3 g6 3 g3: Anti-King's Indian systems} (8. Na3 d5 9. Nb3 h6 10. Be3 Kh7 11. h3 e5 12. Bc5 Re8 13. c4 Be6 14. cxd5 Bxd5 15. Bxd5 Qxd5 16. Qxd5 Nxd5 {0-1 (58) Mosadeghpour,M (2444)-Pourramezanali,A (2510) Teheran 2017}) 8... Rb8 9. Qa4 $146 ({Predecessor:} 9. Be3 d6 10. h3 Na5 11. Nd2 a6 12. Rc1 Bd7 13. b4 Nc6 14. a4 b5 15. axb5 Nxd4 16. Bxd4 axb5 {0-1 (38) Kies,W (1996)-Balduan,M (2287) Leverkusen 1999}) 9... a6 10. Rd1 {The position is equal.} Qc7 11. Nxc6 bxc6 12. Na3 d6 13. e5 Nd5 14. exd6 exd6 15. Nc4 Bg4 {...Nb6 is the strong threat.} 16. Re1 Be6 $1 17. Bd2 Qd7 18. Qa3 Nc7 19. Ne3 ({Much worse is} 19. Qxd6 Qxd6 20. Nxd6 Rxb2 $15) 19... d5 20. Rad1 Bh3 21. Bf3 h5 22. Ng2 Rfc8 23. Nf4 Bf8 24. Qa4 Bg4 25. Bxg4 hxg4 (25... Qxg4 $11 26. Qxc6 Rxb2) 26. b3 (26. Nd3 $16) 26... Nb5 $11 27. Ng2 Bd6 (27... Ra8 $11) 28. Ne3 $14 f5 29. Ng2 {[#]} Kf7 (29... g5 $1 $11 {[%mdl 512] keeps the balance.}) 30. b4 (30. Nh4 $16) 30... Re8 31. Qc2 Na3 32. Qc1 Nc4 33. Bf4 Rbd8 34. Bg5 Rc8 (34... Rxe1+ $17 35. Nxe1 Re8) 35. Nh4 (35. Be3 $11) 35... Rh8 (35... Rxe1+ $17 36. Rxe1 Re8) 36. Re2 {[#]} (36. Bf4 $11) 36... Rce8 $1 $17 {[%cal Re8e2]} 37. Rde1 Rxe2 38. Rxe2 Re8 $36 {[%mdl 2048] Black has strong initiative.} 39. Qe1 {[#]} Ne5 (39... Rxe2 $1 $17 40. Qxe2 Be5) 40. Kg2 (40. Re3 $11) 40... Re6 41. Qd1 Nc4 42. Rxe6 (42. h3 $11) 42... Qxe6 43. Qd3 $2 (43. Kf1 $17) 43... Qe4+ $19 44. Qxe4 dxe4 {[%mdl 4096] Endgame KBN-KBN} 45. Bf4 Be7 46. h3 (46. Bb8 {is a better defense.}) 46... gxh3+ 47. Kxh3 g5 48. Bxg5 Bxg5 49. Nxf5 Ke6 50. Nd4+ Kd5 51. Ne2 Ne5 52. Nd4 (52. a3 $142) 52... Bd2 {Black is clearly winning.} 53. Ne2 Kc4 54. g4 Kd3 55. Nd4 Kxc3 {Accuracy: White = 27%, Black = 42%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.21"]
[Round "2.10"]
[White "Perez, Maximiliano"]
[Black "Cheb Terrab, Alejandro"]
[Result "1-0"]
[ECO "B38"]
[WhiteElo "2418"]
[BlackElo "2021"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,71,63,79,85,102,81,100,87,104,68,70,79,105,92,107,81,90,57,73,83,71,43,52,12,15,0,0,-54,-32,-56,-32,-69,186,49,104,104,120,116,118,120,112,124,169,177,940,935,898,890,1017,602,1421,1168,1120,1068]} 1. e4 c5 2. Nf3 g6 3. d4 cxd4 4. Nxd4 Bg7 5. c4 Nc6 6. Be3 d6 7. Nc3 Nf6 8. Be2 O-O 9. O-O Bd7 10. Nc2 Qc8 11. f3 {B38: Sicilian: Maroczy Bind with 5...Bg7 and 7...0-0} Ne5 (11... Rd8 12. Rc1 Be8 13. Qd2 Ne5 14. Nd4 e6 15. b3 a6 16. Rfd1 Qb8 17. Bg5 Rc8 18. f4 Ned7 {1-0 (54) Der Manuelian,H (2269)-Nikcevic,N (2424) Djenovici 2018}) 12. Na3 Ne8 $146 ({Predecessor:} 12... Re8 13. Rc1 b6 14. Qd2 Qb7 15. h3 Rad8 16. f4 Nc6 17. Bf3 e5 18. Nab5 {½-½ (63) Markantonaki,H (2160)-Iordanidou,Z (2104) Athens 2014}) 13. Rc1 {White is better.} Qd8 14. f4 Nc6 15. Qd2 b6 16. Nc2 Bc8 17. f5 Bb7 18. Bh6 Ne5 19. Bxg7 Kxg7 20. Rf4 g5 21. Rf2 h6 22. h4 g4 $1 23. f6+ (23. Nd4 $11 Nf6 24. Nd5) 23... Nxf6 $15 24. Nd4 Bc8 $1 25. Rcf1 Ng6 $2 {[%mdl 8192] [#]} (25... Nh5 $1 $15 {stays ahead.} 26. Qe3 e6) 26. g3 (26. Rxf6 $18 exf6 27. Nd5) 26... Nh5 (26... Ng8 $1 $14) 27. Qe3 $36 {[%mdl 2048] Black is under strong pressure.} ({Not} 27. Nc6 $2 Qe8 $17) 27... Ne5 28. Rf5 Nf6 {[#]} 29. Rxf6 $1 exf6 30. Nd5 f5 31. exf5 Kh7 $2 (31... Rh8) 32. f6 $18 {White is clearly winning.} Rg8 33. Ne7 Rg6 34. Nxg6 Nxg6 35. h5 Ne5 36. Qe4+ {[%mdl 64] Double Attack. Accuracy: White = 41%, Black = 27%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.1"]
[White "Tristan, Leonardo"]
[Black "Hernandez Amura, Gilberto"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2504"]
[BlackElo "2195"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,57,31,35,33,33,37,54,49,58,46,60,24,38,46,66,66,77,77,68,68,81,68,94,28,36,22,27,22,23,31,31,23,40,24,47,28,96,98,104,91,820,810,900,446,439,435,420,418,29992,29993]} 1. e4 c5 2. Nc3 Nc6 3. Bb5 g6 4. Bxc6 dxc6 5. f4 Bg7 6. Nf3 {B23: Closed Sicilian: Lines without g3} Nf6 7. O-O Nd7 8. d3 {White is slightly better.} Nf8 9. Qe1 Ne6 10. f5 Nd4 11. Nxd4 Bxd4+ $146 ({Predecessor:} 11... cxd4 12. Ne2 e6 13. f6 {1-0 (58) Smith,B (2466)-Vasovski,N (2308) Skopje 2011}) 12. Kh1 Qd6 13. Bf4 Be5 14. Qg3 Bxf4 15. Rxf4 Bd7 16. Re1 (16. e5 $16 Qxe5 17. Re1) 16... Qe5 $11 17. fxg6 hxg6 18. Rh4 Qf6 19. Rxh8+ Qxh8 20. Qc7 b5 21. e5 $40 {[%mdl 128] And now e6! would win. White is up to no good.} Qh4 {[%cal Rh4e1]} 22. Rf1 {Threatens to win with Ne4.} Qg4 (22... Rc8 $11 {remains equal.} 23. Qxa7 Qd4) 23. h3 $16 Qe6 24. Ne4 c4 $2 {[%mdl 8192]} (24... Rc8 $16 25. Qxa7 Qxe5) 25. Ng5 $1 $18 {[%csl LRe6,LRf7][%mdl 64] [#] Double Attack} Qd5 26. dxc4 (26. Rxf7 $142 Rc8 {[#]} 27. Rh7 $1 {[%mdl 512]}) 26... Qxc4 27. Rxf7 ({Not} 27. Rd1 Be6 $11) 27... Rc8 28. Qxa7 Qe2 (28... Qd5 $18 29. Qe3 Bf5) 29. Qc5 {Accuracy: White = 60%, Black = 48%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.2"]
[White "Perez, Andres Eloy"]
[Black "Alonso, Salvador"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2182"]
[BlackElo "2497"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,72,2,16,6,29,21,8,-7,-7,-7,-7,0,0,-8,0,0,0,0,0,-23,-7,-130,-127,-119,-107,-156,-166,-170,-174,-166,-161,-246,-245,-240,-234,-230,-222,-281,-280,-331,-290,-422,-419,-412,-414,-425,-416,-391,-401,-450,-455,-460,-454,-510,-508,-695,-690,-672,-647,-775,-750]} 1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 e6 6. Be3 cxd4 7. cxd4 Bb4+ 8. Nc3 {B22: Sicilian: 2 c3} O-O 9. Bd3 (9. Be2 Nc6 10. O-O Qd8 11. Qb3 {½-½ (11) Yudin,S (2526)-Fier,A (2558) Almaty 2018}) 9... b6 10. Qe2 {The position is equal.} Bb7 11. O-O Qh5 12. Ne5 Qxe2 13. Bxe2 Nbd7 14. Rac1 $146 ({Predecessor:} 14. Rfd1 Rfd8 15. Bg5 Rac8 {0-1 (26) Boyard,M (1996)-Milliet,S (2387) Fort de France 2012}) 14... Rac8 15. Rfd1 Rfd8 16. Bg5 h6 17. Bh4 {[#]} (17. Be3 $11 {keeps the balance.}) 17... Nxe5 $1 $17 18. dxe5 Rxd1+ {[%mdl 64] Overworked Piece} 19. Rxd1 Bxc3 20. bxc3 {[#]} Nd5 $1 $36 {[%cal Rd5c3][%mdl 2048] White is under strong pressure.} 21. Bf3 Rxc3 22. Be7 (22. Bg3 $142) 22... Nxe7 $19 23. Bxb7 {[%mdl 4096] Endgame KRB-KRN} g5 24. Be4 Nc6 25. g3 Nxe5 26. f4 Ng4 27. Rd7 (27. Bd3 {was worth a try.}) 27... Nf6 28. Rd8+ Kg7 29. Bd3 gxf4 30. gxf4 Nd5 31. Bb5 Nxf4 {Black is clearly winning.} 32. Rd7 Ra3 33. Rc7 Ng6 34. Bc4 Rc3 35. Rc8 Ne7 36. Rc7 Nd5 {Accuracy: White = 31%, Black = 82%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.3"]
[White "Cuberli, Emiliano"]
[Black "Villanueva, Mario"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2174"]
[BlackElo "2482"]
[Annotator "TA"]
[PlyCount "36"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,36,-35,-30,-29,-27,-31,-30,-40,-14,-24,-22,-25,0,0,0,0,22,2,5,5,2,-41,-35,-25,-29,-30,-31,-235,-231]} 1. b3 e5 2. Bb2 Nc6 3. e3 g6 4. Bb5 Nge7 5. f4 (5. d4 exd4 6. Bxd4 Nxd4 7. Qxd4 Rg8 8. Qd2 c6 9. Bd3 Bg7 10. c3 d5 11. Ne2 Bf5 12. O-O {½-½ (72) Mamedyarov,S (2799)-Le,Q (2737) Huaian 2017}) 5... Bg7 6. Nf3 {[%cal Rf4e5] A01: Nimzowitsch-Larsen Opening} d6 7. O-O O-O 8. fxe5 {Black has an edge.} Bg4 {[%cal Rc6e5]} 9. Be2 dxe5 10. Nc3 Qd7 $146 ({Predecessor:} 10... e4 11. Ng5 Bxe2 12. Qxe2 Bxc3 13. Bxc3 Qd5 14. Qg4 f5 15. Qh4 h5 16. Nh3 Ne5 17. Qxe7 {1-0 (17) Mustafin,A (2262)-Alivodic,D (1873) Mamaia 2017}) 11. Ng5 Bxe2 12. Qxe2 Nd8 13. Rf2 h6 14. Nge4 f5 15. Qc4+ Qe6 {Strongly threatening ...Qxc4.} 16. Nc5 Qxc4 17. bxc4 b6 18. Nd7 $2 {[#]} (18. Na6 $15) 18... Rf7 {Accuracy: White = 51%, Black = 64%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.4"]
[White "Acosta, Pablo Ismael"]
[Black "Ferrara, Enzo"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2467"]
[BlackElo "2189"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,63,16,13,-34,42,35,59,44,66,49,88,99,108,68,59,44,85,60,73,81,125,125,177,48,68,-12,102,104,207,201,193,201,193,187,268,229,212,232,278,302,296,304,337,338,331,325,340,328,331,314]} 1. c4 f5 2. g3 Nf6 3. Bg2 g6 4. Nc3 Bg7 5. d3 d6 6. e4 c6 7. Nge2 O-O 8. O-O e5 9. Qb3 {A21: English Opening: 1...e5 2 Nc3} (9. exf5 Bxf5 10. h3 h5 11. Bg5 Na6 12. Qd2 Qd7 13. Kh2 Rae8 14. Rad1 Nc5 15. Qe3 Ne6 16. Bxf6 Bxf6 17. Ne4 {½-½ (45) Carlsen,M (2832)-Guseinov,G (2645) chess.com INT 2017}) 9... Kh8 ({Better is} 9... Na6 $15) 10. exf5 $146 ({Predecessor:} 10. Be3 Ng4 11. Bd2 Nd7 12. h3 Ngf6 13. Rad1 Nh5 14. exf5 Nc5 15. Qc2 gxf5 16. Bf3 Qe8 {1-0 (37) Vovk,O (2077)-Tretvold,M Copenhagen 2002}) 10... gxf5 11. d4 {White is slightly better.} Qb6 12. Rd1 Qxb3 13. axb3 Na6 14. dxe5 dxe5 15. h3 e4 16. Nf4 $36 {[%mdl 2048] White fights for an advantage.} Re8 17. Be3 Nd7 18. Ra5 Be5 {[#]} (18... Nf6 $16 {keeps fighting.} 19. Rd6 Nc7) 19. Rda1 ({White should try} 19. Nh5 $1 $18) 19... Kg8 20. g4 (20. Bf1 $14) 20... Nf8 (20... Ndc5 $1 $11 {keeps the balance.}) 21. Nh5 $16 Kf7 (21... Ng6 $16 {was called for.}) 22. gxf5 $18 Bxf5 23. Ng3 Bg6 24. Ngxe4 Bc7 (24... Kg8 $142 25. h4 Rad8 26. Bxa7 Bxe4) 25. Rxa6 bxa6 26. Ng5+ {[%mdl 64] [#] Discovered Attack} Kf6 {Threatening ...Rxe3.} 27. Bxc6 {[%mdl 64] Double Attack. White has a decisive advantage.} Rxe3 28. fxe3 Rb8 29. Nf3 ({And not} 29. Rxa6 Kxg5 30. Rxa7 Ne6 $15) 29... Bb6 30. Nd5+ Ke6 31. Rxa6 Kd6 32. Nxb6 {Accuracy: White = 59%, Black = 26%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.5"]
[White "Sarquis, Maria Belen"]
[Black "Slipak, Sergio"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2141"]
[BlackElo "2427"]
[Annotator "TA"]
[PlyCount "42"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,42,23,7,-29,-25,-91,-28,-113,-64,-47,-36,-87,-42,-46,-60,-62,0,0,0,-141,-133,-139,-138,-137,-121]} 1. e4 c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bh5 5. exd5 cxd5 6. Bb5+ Nc6 7. g4 Bg6 8. Ne5 Rc8 9. d4 e6 10. Qe2 Bd6 11. Bf4 {B11: Caro-Kann: Two Knights Variation} (11. Nxg6 hxg6 12. Nxd5 Kf8 13. Bxc6 Rxc6 14. Ne3 Nf6 15. c3 Bb8 16. Qf3 e5 17. dxe5 Nd7 18. Qd5 Qe8 {0-1 (46) Venkatesh,M (2517)-Ding,L (2679) Ho Chi Minh City 2012}) 11... Nge7 12. h4 (12. Nxg6 $11 Nxg6 13. Bxd6 Qxd6 14. O-O-O) 12... h5 (12... Bxe5 $17 13. Bxe5 O-O) 13. f3 $146 (13. Nxg6 $11 Nxg6 14. Bg5) ({Predecessor:} 13. Nxg6 Nxg6 14. Bxd6 Qxd6 15. gxh5 Nf4 16. Qg4 Nxh5 17. Rg1 g6 {0-1 (30) Hurney,K (2058)-Eden,T (2188) England 2011}) 13... Kf8 14. Bxc6 bxc6 (14... Bxe5 $5 15. Qxe5 Nxc6 16. Qd6+ Kg8 17. Qxd8+ Nxd8 $15) 15. Qh2 (15. O-O-O $15) 15... Bb4 16. a3 Bxc3+ 17. bxc3 Qa5 (17... Kg8 $15) 18. Kd2 $11 Kg8 {And now ...hxg4 would win.} 19. Nd7 {[#]} (19. Bg5 $11 {remains equal.} Qa4 20. Rac1) 19... c5 $1 $17 {[%cal Rc5d4][%mdl 512] Black is clearly better.} 20. Nxc5 (20. dxc5 Qa4) 20... Rxc5 21. dxc5 d4 $1 {Accuracy: White = 31%, Black = 35%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.6"]
[White "Saldano Dayer, Horacio"]
[Black "Capparelli, Damian"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2422"]
[BlackElo "2182"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,51,13,8,-2,0,-10,18,10,41,20,33,8,38,43,56,53,60,52,54,37,106,106,88,89,132,126,133,134,142,157,172,123,168,147,162,149,189,182,228,241,392,389,535,535]} 1. Nf3 d5 2. c4 e6 3. g3 Nf6 4. Bg2 Be7 5. O-O O-O 6. Ne5 {A14: English Opening: 1...e6 with b3 by White} (6. b3 c5 7. Bb2 Nc6 8. e3 b6 9. Nc3 dxc4 10. bxc4 Bb7 11. Qe2 Rc8 12. Rad1 Qc7 13. Ne1 Ne8 14. f4 Nd6 15. Nf3 a6 16. a4 f5 17. d3 Bf6 18. h3 Nb4 19. g4 g6 {1-0 (31) Artemiev,V (2709)-Nakamura,H (2749) Caleta 2019}) 6... c5 7. cxd5 Nxd5 (7... exd5 {seems wilder.} 8. e3 Re8 9. Nc3 d4 10. Ne4 Nfd7) 8. Nc3 {The position is equal.} Qc7 $146 (8... Bf6 {is interesting.} 9. Ng4 Be7 10. d3 Nc6 11. f4 Rb8) ({Predecessor:} 8... Bf6 9. Ng4 Be7 10. Qb3 Nc6 11. d3 Nd4 12. Qd1 Bd7 13. Ne5 Be8 14. Nxd5 exd5 {0-1 (32) Dragicevic,D (2351)-Turner,M (2538) Lund 2017}) 9. Nxd5 exd5 10. Nd3 Be6 11. Nf4 Rd8 12. e4 dxe4 13. Nxe6 fxe6 14. Qg4 Nc6 ({Black should try} 14... Qd7 $14) 15. Qxe6+ $16 ({But not} 15. Bxe4 Qd7 $14) 15... Kh8 16. Bxe4 Rd6 17. Qf5 {[%csl Ge4][%cal Rf5h7] [#]} Rh6 18. d3 Rf8 19. Qg4 $40 {[%mdl 128] White has strong attack.} Ne5 20. Qe2 Re6 21. Be3 b6 22. f4 Nc6 {[#]} 23. f5 $1 {[%cal Rf5e6]} Re5 24. Bf4 Bf6 $2 (24... Bd6 {was necessary.} 25. Bxe5 Bxe5) 25. Bxc6 $18 Qxc6 26. Bxe5 {Accuracy: White = 77%, Black = 29%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.7"]
[White "Alarcon Careaga, Gustavo"]
[Black "Perez, Maximiliano"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2138"]
[BlackElo "2418"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,100,-43,-19,-16,-13,-25,-25,-16,-13,-23,0,-71,-56,-61,-53,-54,-67,-59,-66,-66,-62,-81,-20,-106,-97,-111,-90,-170,-170,-173,-59,-63,-59,-66,-60,-47,-48,-67,-25,-25,-14,-47,-49,-33,-31,-86,-79,-77,56,41,51,-17,-11,-33,-28,-21,-32,-18,-15,-26,-12,-26,-34,-48,-20,-25,-35,-28,-39,-11,-14,-17,-8,-8,-8,-8,-8,-8,-8,-8,-8,-38,-38,-5527,-5405,-5181,-2396,-29955,-1789,-1789,-1779,-29982,-29983]} 1. g4 d5 2. h3 e5 3. Bg2 c6 4. d4 e4 5. c4 Na6 (5... f5 6. Nc3 Bb4 7. Qb3 Bxc3+ 8. bxc3 Nf6 9. Ba3 Be6 10. Qxb7 Nbd7 11. Qxc6 Kf7 12. gxf5 Bxf5 13. cxd5 {0-1 (33) Vovk,O (2353)-Kuzubov,Y (2637) Lvov 2017}) 6. Nc3 {A00: Irregular Openings} Bb4 $146 ({Predecessor:} 6... Nc7 7. f3 f5 8. cxd5 cxd5 9. Qb3 Bd6 10. Kf1 Ne7 11. g5 Rb8 12. h4 b5 13. Nh3 {½-½ (61) Basman,M (2390)-King,D (2435) Brighton/ East Sussex 1984}) 7. Bf4 Ne7 8. e3 {Black has an edge.} Ng6 9. Nge2 Nh4 10. Rg1 (10. Kf1 $11 {remains equal.}) 10... Nf3+ ({Of course not} 10... Nxg2+ $6 11. Rxg2 dxc4 12. a3 $11) 11. Bxf3 exf3 12. Nc1 $1 Qa5 $36 {[%mdl 2048] Black has some pressure.} 13. Kd2 dxc4 14. Qxf3 Be6 15. N1e2 $1 O-O (15... Rd8 $17) 16. Ke1 (16. a3 $11 Be7 17. Rad1) 16... Be7 $17 17. Kf1 Nb4 18. Ng3 (18. Rb1 $17) 18... Nd3 $19 19. e4 Nxf4 ({Better is} 19... Rfd8 $19 20. Nge2 b5) 20. Qxf4 $15 Bg5 21. Qf3 $1 Rad8 22. Rd1 Qb6 23. Nge2 $1 Qc7 24. Qg3 Qxg3 25. Rxg3 (25. Nxg3 {seems wilder.} Rfe8 26. Kg2 g6 27. Nge2 b5 28. f4) 25... b5 26. f4 Be7 27. f5 ({White should play} 27. d5 $15) 27... Bc8 $1 $17 28. e5 f6 (28... Rfe8 $17) 29. e6 $14 Bb7 30. Re3 (30. Ke1 $14) 30... b4 $11 31. Ne4 c5 $1 32. Nxc5 Bxc5 {[%mdl 64] Pin} 33. e7 Bxe7 $1 34. Rxe7 Rf7 35. Rxf7 Kxf7 {[%mdl 4096] Endgame KRB-KRN} 36. Kf2 g6 37. fxg6+ hxg6 38. a3 a5 39. axb4 axb4 40. Ra1 Ra8 41. Rxa8 Bxa8 {KB-KN} 42. h4 $1 Bd5 {Threatens to win with ...c3!} 43. Ke3 g5 44. hxg5 $1 fxg5 {With the idea ...Be6.} 45. Ng3 Ke6 46. Nf5 $2 {[%mdl 8192]} (46. Kd2 $15) 46... c3 $19 47. bxc3 {[#]} b3 $1 {[%cal Rb3b2]} 48. Kd2 {[#]} Be4 $1 49. d5+ Kd7 50. Kc1 Bxf5 {Accuracy: White = 48%, Black = 65%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.8"]
[White "Garcia Palermo, Carlos"]
[Black "Sasson, Maximiliano"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2407"]
[BlackElo "2118"]
[Annotator "TA"]
[PlyCount "35"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,35,16,26,27,58,52,134,129,240,203,341,347,343,345,601,595,901,905]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. Be3 Nc6 10. Rc1 Qc7 11. h4 {D87: Exchange Grünfeld: Classical Line: Variations without ...cxd4} Na5 (11... Rd8 12. h5 b5 13. Bd5 e6 14. Bxc6 Qxc6 15. hxg6 fxg6 16. f3 a5 17. Kf2 Ba6 18. Qg1 b4 {0-1 (45) Fedoseev,V (2664)-Wei,Y (2724) Ningbo 2015}) 12. Bd3 f5 {[#]} (12... h5 $14) 13. e5 $1 $16 {White is clearly better.} Be6 $146 {[#]} (13... Rd8 $16 {is a better defense.}) ({Predecessor:} 13... Rd8 14. h5 c4 15. Bb1 Bxe5 16. hxg6 hxg6 17. Rh6 Qc6 18. Nf4 Bxf4 19. Bxf4 Qxg2 {1-0 (31) Durarbayli,V (2597)-Tate,A (2264) Legnica 2013}) 14. h5 $1 $18 {Threatens to win with hxg6.} Bxa2 (14... Nc4 $142 15. Nf4 Nb2) 15. hxg6 hxg6 16. Nf4 Qc6 $2 (16... Qb6 17. dxc5 Qc6) 17. Qe2 Bd5 {and the idea ...c4 leaves Black hopeful.} 18. Bb5 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.9"]
[White "Rodriguez, Jorge Luis"]
[Black "Rodriguez, Luis Jose Lucio"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2385"]
[BlackElo "2116"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,89,38,47,90,73,80,67,78,52,76,51,70,58,50,29,58,60,51,35,90,97,127,100,115,96,125,104,105,83,98,84,91,72,103,106,128,134,122,119,135,135,154,47,52,43,119,94,145,150,148,105,193,108,176,148,210,166,200,196,209,206,195,199,237,219,242,239,316,314,406,371,646,639,776,766,831,820,819,799,848,738]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd8 4. d4 c6 5. Bc4 Nf6 6. Nf3 e6 {B01: Scandinavian Defence} (6... b5 7. Bb3 e6 8. a4 b4 9. Ne2 Be7 10. a5 O-O 11. O-O Nbd7 12. Nf4 Ba6 13. Re1 c5 14. Ba2 {½-½ (75) Jones,G (2682)-Usmanov,V (2450) St Petersburg 2018}) 7. O-O Be7 8. Qe2 O-O {White is slightly better.} 9. Bg5 a5 10. a4 Na6 11. Rad1 Nb4 12. Bc1 Nbd5 13. Ne4 $146 ({Predecessor:} 13. Ne5 Qe8 14. Rd3 {1-0 (56) Klovans,J (2420)-Franck,R (2195) Arco 2001}) 13... Qc7 14. c3 Nf4 (14... b6 $14) 15. Nxf6+ $16 gxf6 16. Qe3 Bd6 17. g3 Ng6 18. Bd3 Kh8 19. Rfe1 Rg8 20. Qh6 Rg7 21. Kf1 Bd7 22. Qh5 Rb8 23. Bh6 Rgg8 24. Re4 {And now Rh4! would win.} Bf8 25. Bf4 Bd6 {[%cal Rd6f4]} 26. Bxd6 (26. Bd2 $16) 26... Qxd6 $14 27. Qxa5 $40 {[%mdl 128] White mounts an attack.} Ra8 (27... b5 $1 $14) 28. Qc5 $16 Qc7 (28... Qd5 $142) 29. Bc2 Ra5 30. Qc4 Rga8 (30... b5 $16 31. axb5 Qb7) 31. Nh4 ({White should play} 31. b4 $18 R5a7 32. Qd3) 31... Kg7 (31... b5 $16 32. axb5 Kg8) 32. b4 Rd5 (32... Rh5 $16 {was necessary.}) 33. Ng2 f5 34. Ree1 b5 35. axb5 Rxb5 36. Ra1 Qb7 37. Kg1 Rg8 38. Qe2 Kh8 39. Bd3 Rd5 40. Bc4 f4 $2 {[#]} (40... Rd6 41. Nf4 Qc7) 41. Bxd5 $18 {White is clearly winning.} fxg3 42. Bf3 gxf2+ 43. Kxf2 Qc7 44. Kg1 e5 45. Kh1 {Accuracy: White = 54%, Black = 38%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.22"]
[Round "3.10"]
[White "Mendez, Pablo"]
[Black "Pierrot, Facundo"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2101"]
[BlackElo "2383"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,110,32,34,25,25,27,44,34,24,20,58,18,23,8,18,9,65,33,39,36,110,112,113,121,114,99,106,90,93,87,127,127,202,61,94,33,43,17,17,-58,-30,-41,35,22,48,25,30,9,31,5,6,0,19,0,12,-34,-37,-121,-137,-127,-121,-135,-75,-80,-29,-96,-67,-137,0,0,0,-76,0,0,0,-346,-326,-29982,-29983,-29982,-29983,-29982,-29974,-29983,-29975,-29983,-29984,-29984,-29982,-29985,-29986,-29984,-29985,-29992,-29993,-29996,-29992,-29996,-29989]} 1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Nf3 Bg7 5. Be2 O-O 6. O-O c5 7. d5 e6 8. Bf4 {Threatens to win with dxe6. A43: Schmid Benoni} exd5 9. exd5 Bg4 10. h3 {White is slightly better.} Bxf3 $1 11. Bxf3 ({Much worse is} 11. gxf3 Nh5 $17) 11... Ne8 12. Qd2 Nd7 13. Rfe1 $146 ({Predecessor:} 13. Be2 f5 14. Be3 a6 15. a4 Qb6 {1-0 (134) Nisipeanu,L (2665)-Valeanu,E (2456) Mamaia 2013}) 13... Ne5 14. Be2 a6 (14... f5 $11) 15. a4 $36 {[%mdl 2048] White is more active.} b6 16. Ne4 Nc7 (16... Nf6 $14 17. Nc3 Nfd7) 17. Bg5 $16 f6 18. Bh4 $1 Kh8 19. f4 Nf7 20. c3 Nh6 21. Bf3 Nf5 22. Bf2 Ne7 (22... Rb8 $16 23. a5 bxa5) 23. Ng3 (23. a5 $18) 23... Qd7 24. Re2 (24. a5 $16 bxa5 25. Rxa5) 24... f5 $14 25. Rae1 Ng8 26. Re6 ({White should try} 26. Qc2 $11) 26... Rad8 27. a5 b5 (27... Qb5 $15) 28. R6e2 Rde8 29. Rxe8 Rxe8 30. Rxe8 Qxe8 (30... Nxe8 {looks sharper.} 31. b4 Bf8 32. c4 bxc4 33. bxc5 dxc5 34. Be2 Ngf6) 31. b3 Nf6 {[%cal Bg8f6,Bf6d5,Bd5c3][%mdl 32]} 32. c4 b4 33. Qe3 Qd8 34. Qe1 Nce8 35. Qa1 {[#]} (35. Nf1 $15) 35... Nxd5 $1 $17 {[%mdl 512]} 36. Qc1 (36. cxd5 Bxa1) 36... Nc3 37. Qe3 Nf6 ({Better is} 37... Bf6 38. Ne2 Ng7) 38. Qe6 h5 (38... Qd7 $17 39. Qxd7 Nxd7) 39. Ne2 (39. Nf1 $11) 39... Nce4 40. Bh4 (40. Bxe4 $1 $15 fxe4 41. Ng3) 40... Qg8 ({Of course not} 40... Qxa5 $6 41. Bxe4 Qa1+ 42. Kh2 $11) (40... Nd2 $17 41. Qf7 Qe8 42. Qxe8+ Nxe8) 41. Qe7 $11 d5 42. cxd5 (42. Bxf6 $1 $11 {keeps the balance.} Bxf6 43. Qb7) 42... Qxd5 (42... Nxd5 $17 43. Qa7 Ndc3 44. Qxa6 Qxb3 45. Nxc3 Qxc3 46. Bxe4 Qe3+ 47. Bf2 Qxe4) 43. Bxf6 $1 Bxf6 44. Qe8+ $2 {[%mdl 8192]} (44. Qf8+ $1 $11 {and White is okay.} Kh7 45. Bxe4 Bd4+ 46. Nxd4 Qxd4+ 47. Kh2 Qxe4 48. Qf7+ Kh8 49. Qf6+ Kh7 50. Qf7+ Kh6 51. Qf8+ {[%mdl 64] Double Attack} Kh7 52. Qf7+) 44... Kg7 $19 45. Ng3 $2 {[#]} (45. Kh2 $19 Qxb3 46. Bxe4 fxe4 47. Qc8) 45... Qd4+ $1 {Black mates.} 46. Kh2 Nxg3 47. Kxg3 h4+ 48. Kh2 Qxf4+ 49. Kh1 c4 50. Bd5 Be5 {[%csl Ge5][%cal Rf4h2]} 51. Qf7+ Kh6 {[%csl Ge5][%cal Rf4h2]} 52. Qf8+ Bg7 53. Qe7 c3 54. Qe2 Be5 {[%csl Ge5][%cal Rf4h2]} 55. Kg1 Qd4+ {Accuracy: White = 26%, Black = 34%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.1"]
[White "Pierrot, Facundo"]
[Black "Tristan, Leonardo"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2383"]
[BlackElo "2504"]
[Annotator "TA"]
[PlyCount "132"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,132,19,22,-49,-43,-57,-54,-61,-54,-72,-71,-83,-92,-94,-99,-105,-69,-83,-29,-90,-87,-90,-85,-99,-44,-105,-116,-122,-95,-117,-117,-119,-63,-74,-90,-99,-88,-83,-80,-125,-124,-184,-187,-184,-176,-170,-172,-216,-210,-495,-491,-453,-367,-373,-360,-507,-73,-74,-74,-74,-74,-85,-82,-193,-181,-190,-179,-177,-54,-131,-117,-229,-227,-258,-223,-374,-364,-724,-701,-660,-660,-535,-482,-474,-452,-576,-568,-1054,-1047,-984,-830,-4622,-4614,-4133,-2127,-29969,-29964,-29978,-29979,-29978,-29979,-29967,-29958]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Na5 10. Bc2 c5 11. d4 Nd7 12. Nbd2 exd4 13. cxd4 Nc6 14. Nf1 Nxd4 15. Nxd4 cxd4 16. Qxd4 Ne5 17. Ne3 {C96: Closed Ruy Lopez: Chigorin Defence: 11 d4, replies other than 11...Qc7} (17. f4 $11 Nc6 18. Qe3) 17... Bxh3 $1 $15 18. Nd5 Rc8 19. Bb3 {Black is slightly better.} Bf6 20. Qd1 Bg4 21. f3 {[#]} Be6 $146 ({Predecessor:} 21... Bh5 22. g4 Bg5 23. Be3 Bxe3+ 24. Rxe3 Qg5 {1-0 (68) Bluvshtein,M (2462)-Arencibia Rodriguez,W (2531) Kapuskasing 2004}) 22. Nxf6+ Qxf6 23. Be3 Bc4 24. Bc2 b4 (24... h5 $17 25. Rc1 Bxa2) 25. Rc1 (25. f4 $11 {keeps the balance.}) 25... Bb5 26. Bb1 Rxc1 27. Bxc1 Rc8 (27... h5 $17) 28. a3 (28. f4 $15 Ng6 29. Qd2) 28... bxa3 $17 29. bxa3 h5 30. a4 Bc4 31. Qd2 Rb8 (31... Bb3 $17 32. Qg5 Qxg5 33. Bxg5 Bxa4) 32. Bc2 $1 $15 Bb3 $36 {[%mdl 2048] White is under strong pressure.} 33. Rf1 Bxc2 34. Qxc2 h4 35. Qe2 {[#]} h3 $1 {[%mdl 512]} 36. gxh3 (36. Qxa6 $17 Qg6 37. Qe2) 36... Rb3 $19 {[%cal Re5f3]} 37. Kg2 Qg6+ 38. Kh2 Qh5 39. Be3 Ng6 {...Qe5+ is the strong threat.} 40. Rg1 $2 (40. Bd2) 40... Qe5+ 41. Kh1 Rb2 42. Bd2 Qe6 43. Qh2 (43. Qg2 $142) 43... Ne5 $2 (43... Qb3 $19 {and Black stays clearly on top.} 44. Rf1 Qc2 45. Qxd6 Qxd2 46. Qxd2 Rxd2) 44. Qg3 $17 {[%csl Gg1][%cal Rg3g7]} g6 45. Bc3 Rb3 46. Bxe5 dxe5 {[%mdl 4096] Endgame KQR-KQR} 47. Rc1 {[#]} (47. h4 $17) 47... Qf6 $1 $19 48. Kg2 Rb2+ 49. Kh1 Qd6 (49... Ra2 $19 50. h4 Kh7) 50. Qg5 ({Better is} 50. h4 $15) 50... Kg7 $17 51. Rg1 (51. Qg3 $17) 51... Qf6 52. Qxf6+ Kxf6 $19 {KR-KR} 53. Rc1 $2 {[#]} (53. h4 {was called for.}) 53... Kg5 $1 54. Rc7 $2 (54. Kg1 Kf4 55. Rc7) 54... Kf4 55. Kg1 Kg3 {( -> ...Rb1+)} 56. Kf1 Rf2+ 57. Ke1 Rxf3 58. Ke2 Rf4 59. Ke3 f5 60. exf5 gxf5 61. a5 Ra4 62. Rg7+ Kxh3 63. Rg5 f4+ {Black mates.} 64. Kf3 Ra3+ 65. Ke4 Re3+ 66. Kd5 f3 {Accuracy: White = 29%, Black = 61%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.2"]
[White "Alonso, Salvador"]
[Black "Della Morte, German"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2497"]
[BlackElo "2366"]
[Annotator "TA"]
[PlyCount "162"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,162,30,16,18,4,9,0,3,0,14,13,16,7,11,0,22,8,34,0,11,8,11,0,0,0,0,0,0,0,0,0,0,-9,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,18,0,0,0,0,0,0,-12,0,-14,-14,-14,-14,-14,-20,-12,0,-61,-33,-33,-33,-29,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,34,8,8,5,8,0,0,0,0,0,0,-8,-8,-31,-14,-14,-14,-14,-15,-17,-20,-22,-15,-24,-15,-22,-14,-22,-8,-14,-8,-8,-8,-13,-13,-22,-22,-67,-33,-68,-68,-68,-68,-29963,-29964,-29954,-29957,-7697,-8337,-5544,-670]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. O-O O-O 6. c3 d6 7. Nbd2 a5 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} 8. Bb3 Be6 (8... h6 9. Re1 Be6 10. Nf1 Re8 11. Ba4 Qb8 12. d4 exd4 13. cxd4 Bb4 14. Re2 b5 15. Bc2 {0-1 (33) Aronian,L (2767)-Nakamura,H (2777) chess.com INT 2018}) 9. Re1 Bxb3 {The position is equal.} 10. Nxb3 Ba7 $146 ({Predecessor:} 10... a4 11. Nxc5 dxc5 12. Bg5 h6 13. Be3 Qe7 14. Nh4 {½-½ (36) Fang,Y (2420)-Zhou,W (2606) China 2017}) 11. Bg5 h6 12. Bh4 g5 13. Bg3 Re8 14. Nbd2 d5 15. a4 dxe4 16. dxe4 Qd3 17. Qe2 (17. Nb3 {feels hotter.} Qxd1 18. Raxd1 Rab8 19. Kf1 b5 20. Nbd2) 17... Qxe2 18. Rxe2 Nd7 19. Nc4 f6 20. Nfd2 Nc5 21. Kf1 Red8 22. f3 Rd3 23. Bf2 Ne6 24. Bxa7 Rxa7 25. Nb3 Ra8 26. Rd2 Rxd2 27. Ncxd2 Rd8 28. g3 b6 29. Ke2 Kf7 30. Rh1 Rg8 31. Nc4 h5 32. Ne3 Rb8 33. Kd3 h4 34. Ng4 Rh8 {White must now prevent ...hxg3.} 35. Rg1 Nb8 36. Ke2 Nd7 37. Nd2 Ndc5 38. Ra1 Rd8 {Strongly threatening ...Rxd2+!} 39. Nc4 Nb3 40. Rg1 Rh8 41. Nd2 ({Better is} 41. Nce3 $11) 41... Nxd2 42. Kxd2 hxg3 43. hxg3 $15 {[%mdl 4096] Endgame KRN-KRN} Nc5 44. b4 Nxa4 45. Ra1 Nb2 46. Kc2 $1 {[%cal Rc2b2]} Nc4 47. Kd3 Nd6 48. bxa5 bxa5 49. Rxa5 Rh3 50. Ra7 Ne8 51. Ke2 Rxg3 52. Ne3 Ke6 53. Ra6+ Kd7 54. Nd5 c6 55. Ra7+ Kd6 56. Ne3 Kc5 57. Ra5+ Kb6 58. Ra8 Nd6 59. Rf8 {[#]} g4 $1 {[%mdl 512]} 60. Nxg4 Nxe4 61. Nxf6 Nxc3+ 62. Kf2 Rg7 63. Ng4 Re7 64. Ke3 e4 65. fxe4 Nxe4 66. Kd3 Nc5+ 67. Kd2 Ne6 68. Rb8+ Kc7 69. Ra8 Kb7 70. Ra1 c5 71. Ne3 Nd4 72. Rb1+ Kc6 73. Nc4 Rh7 74. Rb6+ Kd5 75. Kd3 {[%csl Gc4][%cal Rb6d6]} Nf5 76. Nd2 Rh3+ 77. Kc2 Ne3+ 78. Kb2 $2 {[%mdl 8192]} (78. Kb1 $15) 78... Rh2 79. Kc3 {[#]} Rxd2 $1 {[%mdl 512]} 80. Rb8 (80. Kxd2 Nc4+) 80... Rh2 {( -> ...Nd1+)} 81. Rd8+ Kc6 {Accuracy: White = 57%, Black = 51%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.3"]
[White "Villanueva, Mario"]
[Black "Romero Barreto, Jaime Jose"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2482"]
[BlackElo "2337"]
[Annotator "TA"]
[PlyCount "56"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,56,32,34,46,48,58,43,66,52,65,77,71,-19,-27,-25,44,-11,122,119,129,129,162,135,148,73,57,31,43,0,124,0,17,-1222,-1194]} 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. c4 Bb7 12. Nc3 c6 13. a3 Qb8 {[#] C95: Closed Ruy Lopez: Breyer Variation with 10 d4} 14. Bg5 $146 ({Predecessor:} 14. Be3 Bd8 15. Ba2 Bb6 16. dxe5 Bxe3 17. exf6 Bh6 18. fxg7 Bxg7 19. cxb5 axb5 20. Nd4 Ne5 21. Nf5 {1-0 (42) Yu,Y (2667)-Yang,K (2331) China 2014}) 14... Re8 15. Ba2 exd4 {White is slightly better.} 16. Nxd4 c5 17. Nf5 b4 18. Na4 (18. axb4 $16 cxb4 19. Na4 (19. Nxe7+ Rxe7 20. Nd5 Bxd5 $14)) 18... Bf8 $11 19. f3 Bc6 (19... a5 $11) 20. Bb3 (20. axb4 $14 Qxb4 21. b3) 20... Re6 (20... a5 $11) 21. axb4 $16 Qxb4 22. Nc3 a5 23. Nd5 $36 {[%mdl 2048] White is in control.} Qb7 24. Ba4 (24. Bc2 $142) 24... Bxa4 25. Qxa4 Nxd5 26. exd5 Rg6 (26... Rxe1+ $11 27. Rxe1 Qb4 28. Qxb4 cxb4) 27. Bf4 (27. f4 $16) 27... Qxb2 {[%csl Gg6][%cal Rb2g2] [#]} (27... Ne5 $5 28. Bxe5 dxe5 $14) 28. Ra2 $2 {[%mdl 8192]} (28. Nh4 $11 Rf6 29. Bg5) 28... Rxg2+ $1 {Accuracy: White = 26%, Black = 31%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.4"]
[White "Zapata Charles, Santiago"]
[Black "Acosta, Pablo Ismael"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2303"]
[BlackElo "2467"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,105,0,-4,0,0,0,0,0,0,0,0,0,0,0,-16,0,0,-5,-37,-36,-41,10,10,0,3,18,0,0,7,0,-14,-13,-15,-8,-6,-6,-6,-8,-16,-16,-14,0,-18,0,-2,0,0,0,0,0,0,0,-8,-14,-118,-132,-134,-45,-110,-54,-55,138,13,12,11,13,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 d6 2. d4 Nf6 3. Nc3 Nbd7 4. Nf3 e5 5. Bc4 Be7 6. O-O O-O 7. Re1 c6 8. a4 h6 9. Ba2 {C41: Philidor Defence} Re8 10. h3 Qc7 (10... exd4 11. Nxd4 Bf8 12. Be3 Nxe4 13. Nxe4 Rxe4 14. Qf3 d5 15. Rad1 Ne5 16. Qg3 Ng6 17. c4 Bd6 {0-1 (38) Saric,I (2695)-Ivanisevic,I (2603) Skopje 2018}) 11. Nh4 Nf8 12. dxe5 dxe5 13. Qf3 {LiveBook: 5 Games} Be6 14. Nf5 {White wants to play Qg3.} Bxa2 $1 15. Rxa2 Ne6 16. Ne2 {[%cal Bc3e2,Be2g3,Bg3f1,Bf1d2,Bd2c4][%mdl 32]} Rad8 17. Neg3 Kh7 $146 ({Predecessor:} 17... Nd4 18. Nxd4 Rxd4 {1-0 (26) Frigieri,F (2074)-Fiorentini,P (1984) Correggio 2007}) 18. Be3 Ng8 19. Raa1 Bb4 20. c3 Bf8 21. Nf1 g6 22. N5g3 a5 (22... Bc5 $15) 23. Nd2 $11 Rd3 24. Nc4 Bc5 $1 25. Rad1 Red8 26. Rxd3 Rxd3 27. Rd1 Rxd1+ 28. Qxd1 Bxe3 29. Nxe3 Nf6 30. Nc4 b5 31. axb5 cxb5 32. Ne3 Nf4 33. f3 Qc5 34. Ngf1 a4 35. Kh2 Kg7 36. g3 Ne6 37. Qd2 h5 38. Kg2 {[#]} h4 $1 {[%mdl 512] With the idea ...hxg3.} 39. gxh4 (39. Nf5+ $1 $11 gxf5 40. exf5) 39... Nf4+ $17 40. Kh2 Ne8 (40... Qc8 $6 41. Ng4 $15) (40... Qe7 $17 41. Ng2 a3 42. bxa3 Nxg2 43. Qxg2 (43. Kxg2 Nh5 $17) 43... Qxa3) 41. Ng3 {[#]} (41. Nd5 $15) 41... Qc8 (41... Nd6 $1 $17 {[%cal Rd6c4]} 42. Ngf1 Nc4 43. Nxc4 Qxc4) 42. Ng4 $15 f6 $2 {[#]} (42... Nf6 $1 $15 {keeps the upper hand.}) 43. Ne2 (43. h5 $1 $16 {[%mdl 512]}) 43... Nxe2 $11 {The position is equal.} 44. Qxe2 Qd7 45. Qe3 Kf7 46. Qh6 Qd1 47. Qh7+ Kf8 48. Qxg6 Qxf3 49. h5 Nd6 50. Nxf6 {Strongly threatening Qg8+.} ({Much weaker is} 50. Qxf6+ Qxf6 51. Nxf6 Nc4 $17) 50... Qf2+ 51. Kh1 {Hoping for Qg8+.} Qf1+ 52. Kh2 {Black must now prevent Qg8+.} Qf2+ 53. Kh1 {Precision: White = 55%, Black = 59%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.5"]
[White "Slipak, Sergio"]
[Black "Molina, Pablo Sebastian"]
[Result "1/2-1/2"]
[ECO "A48"]
[WhiteElo "2427"]
[BlackElo "2277"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,62,-9,12,-34,-34,-31,-18,-49,-54,-60,-53,-51,-59,-50,-43,-78,-41,-44,-46,-54,-51,-48,-47,-44,-39,-51,0,0,0,-24,0,0,0,-10,0,0,0,0,0,0,0,0,0,-20,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. d4 g6 3. Bg5 Bg7 4. Nbd2 d6 5. e4 h6 6. Bh4 O-O 7. c3 Nc6 8. Bc4 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} Nxe4 {[%mdl 64] [#] Remove Defender, Decoy} 9. Nxe4 d5 {[%mdl 64] Double Attack} 10. Bb3 $146 {Hoping for Nc5.} ({Predecessor:} 10. Bd3 dxe4 11. Bxe4 f5 12. Bc2 g5 13. Bxg5 hxg5 14. Nxg5 Qe8 15. f4 {½-½ (32) Gholami,A (2489)-Sunilduth Lyna,N (2573) Moscow 2018}) 10... dxe4 11. Nd2 Na5 12. Nxe4 Nxb3 13. Qxb3 Be6 14. Qa3 Qd5 15. f3 f5 16. Nc5 Bf7 17. O-O b6 18. Na6 Qb7 {Threatens to win with ...Bc4.} 19. Rfe1 Rfe8 (19... g5 $15 20. Bf2 {[#]} e5 $1 {[%mdl 512]}) 20. Bg3 $11 Rac8 21. Be5 c5 {Threatening ...Bc4.} 22. Bxg7 {The position is equal.} Kxg7 23. dxc5 Bc4 24. Nb4 {Strongly threatening c6.} bxc5 25. Nc2 e5 26. Ne3 Bf7 27. c4 Qb4 28. Qxa7 Ra8 29. Qc7 Rac8 30. Qa7 Ra8 31. Qc7 $1 Rac8 {Accuracy: White = 76%, Black = 74%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.6"]
[White "Quiroga, Facundo"]
[Black "Saldano Dayer, Horacio"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2267"]
[BlackElo "2422"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,110,8,-6,5,-19,0,-2,5,0,0,0,0,-4,0,0,0,0,34,24,50,23,31,31,42,0,0,0,0,0,0,0,0,0,0,0,12,0,0,-112,-126,-96,-101,-73,-89,-135,0,0,0,0,0,0,403,397,373,366,583,607,598,593,580,575,569,572,566,548,517,413,650,648,642,642,653,633,647,607,633,627,629,625,571,497,469,456,516,465,637,490,485,487,476,475,551,547,712,711,858,698,1005,1001,1210,1181,1150]} 1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O Nc6 5. d3 d6 6. Nc3 e5 {A04: Unusual lines after 1 Nf3 and King's Indian Attack} (6... Bd7 7. Bd2 Qc8 8. a3 Bh3 9. Bxh3 Qxh3 10. b4 Nf6 11. bxc5 Ng4 12. Ne4 h6 13. Be1 Nce5 14. Ned2 h5 15. d4 Nxf3+ 16. Nxf3 h4 17. Qd3 hxg3 18. fxg3 Nxh2 {0-1 (18) Bareev,E (2675)-So,W (2773) Chess Supersite INT 2016}) 7. Nd5 h6 8. c4 Nge7 {The position is equal.} 9. Nxe7 $146 ({Predecessor:} 9. Rb1 O-O 10. Ne1 Rb8 11. Bd2 Bd7 12. b4 Nxd5 13. Bxd5 Bh3 14. Ng2 Ne7 {½-½ (39) Vo,T (2413)-Tran,Q (2286) Vietnam 2016}) 9... Qxe7 10. Rb1 O-O 11. a3 a5 12. Ne1 Nd4 13. Nc2 Bg4 14. Re1 Qd7 15. Nxd4 cxd4 16. b4 a4 17. Qc2 Bh3 18. Bd5 Be6 19. Bxe6 Qxe6 20. e3 dxe3 21. Bxe3 d5 {[%cal Bd6d5,Bd5d4][%mdl 32]} 22. b5 Rfd8 23. Rb4 Qf5 24. Rxa4 (24. Bb6 $11 Rdc8 25. c5) 24... Rxa4 $17 25. Qxa4 d4 $1 {[%cal Rd4e3]} 26. Bc1 Qxd3 27. c5 Rc8 (27... Kh7 $17 28. c6 bxc6) 28. c6 $1 $11 {[%cal Rc6b7]} bxc6 29. b6 {Hoping for b7.} Qc3 30. Rf1 Bf8 $2 {[%mdl 8192] [#]} (30... Qc5 $1 $11 {and Black stays safe.} 31. Qa7 Re8) 31. Qa7 $1 $18 Re8 {[#]} 32. Qd7 $1 {[%cal Rd7e8]} Re7 (32... Rb8 $142) 33. Qc8 g5 34. b7 Rxb7 35. Qxb7 e4 36. Bb2 Qd2 37. Qb3 c5 38. Rc1 Qe2 (38... e3 $142) 39. Qc2 {White is clearly winning.} Qb5 40. a4 Qb4 41. Ba1 Bd6 42. Qxe4 Qxa4 43. Qd5 Bf8 44. Kg2 Qb4 45. Qc4 Qb7+ 46. Kg1 Qe4 47. Bb2 h5 48. Ra1 h4 49. Ra7 Qf3 50. Ra3 Qd1+ 51. Kg2 Qb1 52. Rf3 h3+ 53. Kxh3 g4+ 54. Kxg4 Qg6+ 55. Kh3 Qe6+ {Accuracy: White = 73%, Black = 54%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.7"]
[White "Perez, Maximiliano"]
[Black "Barrionuevo, Pablo"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2418"]
[BlackElo "2263"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,97,6,-40,0,0,0,-33,0,-16,0,0,11,13,86,67,98,64,53,46,52,60,64,64,51,7,0,0,7,16,167,148,170,162,177,99,94,0,164,169,143,118,150,103,120,118,141,117,119,125,129,119,125,137,124,142,130,113,124,116,175,171,316,312,277,262,281,284,359,359,498,493,444,337,325,330,320,310,366,364,346,339]} 1. e4 c5 2. Nf3 e6 3. d3 d5 4. Nbd2 Nc6 5. g3 g6 6. Bg2 Bg7 7. O-O Nge7 8. h4 h6 9. Re1 b6 10. Qe2 Ba6 {A08: King's Indian Attack} (10... d4 11. e5 Nd5 12. Nc4 O-O 13. a4 a6 14. Nh2 Rb8 15. Ng4 h5 16. Bg5 Qc7 17. Nf6+ Bxf6 18. exf6 {1-0 (63) Bauer,C (2651)-Fressinet,L (2706) Nancy 2015}) 11. exd5 $146 ({Predecessor:} 11. e5 Qc7 12. Nf1 Rc8 13. c3 b5 14. Bf4 b4 15. N1h2 bxc3 16. bxc3 Qa5 17. Rac1 c4 18. d4 {½-½ (36) Dzhumaev,M (2480)-Barua,D (2515) Raipur 2002}) 11... exd5 12. Nf1 O-O {Black is slightly better.} 13. c3 Re8 14. Bf4 Kh7 15. Qd2 b5 (15... Qd7 $11) 16. Rac1 Qb6 17. Ne3 Rad8 18. Ng4 {[%cal Rf4h6]} Nf5 19. h5 Bc8 20. hxg6+ fxg6 21. Nfe5 g5 $1 {[%cal Rg5f4]} 22. Nxc6 Qxc6 23. Be5 Bxe5 $2 {[#]} (23... Nxg3 $1 $11 24. Bxg3 Bxg4) 24. Nxe5 $18 Qc7 25. d4 $36 {[%mdl 2048] Black is under strong pressure.} c4 26. Ng4 (26. b4 $18) 26... Kg7 $16 27. Ne5 (27. Rxe8 $16 Rxe8 28. Ne5 (28. Bxd5 Qd6 $11)) 27... Kh7 $1 $18 28. Qc2 {[#] Hoping for g4.} Kg7 29. Qd1 Qd6 30. Qh5 {Strongly threatening Qf7+.} Rf8 31. Re2 Kg8 32. Qg6+ Qxg6 33. Nxg6 Rf6 34. Ne7+ Nxe7 35. Rxe7 Rf7 36. Rce1 Kf8 37. R7e5 Bb7 38. Bh3 Kg7 (38... Rf6 $16) 39. Bg4 Kf8 (39... Bc8 {was called for.}) 40. Bh5 Rfd7 41. Rf5+ Kg7 42. Re6 Rg8 43. Rff6 Rh8 44. Rg6+ Kf8 45. Ref6+ Ke7 46. Rxh6 Rxh6 47. Rxh6 Kd8 48. Rg6 Re7 {and the idea ...Re1+ leaves Black hopeful.} 49. Kf1 {Accuracy: White = 53%, Black = 39%.} ({But not} 49. Rxg5 Re1+ 50. Kg2 Rb1 $18) 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.8"]
[White "Madina Yadarola, Martin"]
[Black "Garcia Palermo, Carlos"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2236"]
[BlackElo "2407"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,68,36,89,39,50,21,34,0,0,0,4,0,14,-18,-12,-67,-45,-48,-44,-47,-54,-40,0,-45,-49,-54,-54,-67,-45,-64,-64,-101,-91,-110,-108,-114,-115,-109,-68,-60,-66,-65,-58,-74,-62,-71,-41,-47,-49,-44,-33,-46,-29,-100,-80,-173,-168,-304,-306,-308,-251]} 1. Nf3 b6 2. g3 Bb7 3. Bg2 f5 4. O-O Nf6 5. d3 g6 (5... e6 $14) (5... e6 6. c4 Nc6 7. Nc3 Bb4 8. Bd2 O-O 9. a3 Bxc3 10. Bxc3 d6 11. b4 Ne7 12. d4 Ne4 13. Bb2 Qd7 14. Qd3 {½-½ (70) Iturrizaga Bonelli,E (2673)-Yakubboev,N (2427) Sharjah 2017}) 6. e4 {A04: Unusual lines after 1 Nf3 and King's Indian Attack} fxe4 7. Ng5 Bg7 8. Nxe4 $146 {White is slightly better.} (8. dxe4 {seems wilder.} e5 9. Nc3 Nc6 10. f4 O-O 11. f5) ({Predecessor:} 8. dxe4 e5 9. f4 Nc6 10. b4 Qe7 11. Ba3 b5 12. Nc3 O-O-O 13. Qd2 {1-0 (46) Langheinrich,F (2442)-Schmitzer,K (2302) Frankfurt 2013}) 8... Nxe4 9. dxe4 e6 10. Nc3 Qe7 11. Be3 Nc6 12. f4 (12. Nb5 $11 O-O-O 13. c3) 12... Bxc3 13. bxc3 O-O-O 14. Qd3 Na5 15. Rfb1 d5 16. Bd4 dxe4 17. Qe2 Rhe8 18. Bxe4 Qd6 19. Bxb7+ Kxb7 20. Rb5 Nc6 21. Qf3 a6 22. Re5 Qa3 23. Qg2 Qb2 24. Ree1 Rd5 25. Bf6 Qb5 26. Re4 Qc5+ 27. Bd4 Nxd4 28. cxd4 Qc4 29. Qd2 Red8 {[%cal Rd5d4]} 30. c3 R8d6 31. Rae1 {[#]} (31. Rc1 $11 {remains equal.}) 31... Ra5 $1 $17 {[%cal Bd5a5,Ba5a2,Ba2c2][%mdl 32]} 32. Qg2 (32. R1e2 $17) 32... Ka7 $19 33. Qf3 (33. R1e2 $142) 33... Rxa2 34. R4e3 Rc2 {Accuracy: White = 33%, Black = 65%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.9"]
[White "Converset, Juan Jose"]
[Black "Rodriguez, Jorge Luis"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2227"]
[BlackElo "2385"]
[Annotator "TA"]
[PlyCount "49"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,49,-43,-22,-15,-25,-29,-23,33,26,20,0,0,-47,0,-7,186,181,177,172,345,337,468,468,483,482,606,596,1138,1122,29995,29996,29996,614,29997,29998]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. c3 Nf6 6. d4 cxd4 7. cxd4 Nxe4 8. d5 Nd6 9. Na3 Ne5 {B31: Sicilian: 2...Nc6 3 Bb5 g6} (9... a6 10. Bd3 Na7 11. Re1 O-O 12. Bg5 f6 13. Bf4 Nf7 14. Rc1 Nd6 15. Bxd6 exd6 16. Nc4 b5 17. Nxd6 {1-0 (39) Muzychuk,M (2545)-Ushenina,A (2458) Hancheng 2016}) 10. Nxe5 Bxe5 11. Re1 Bf6 (11... Nxb5 $2 12. Rxe5 d6 13. Re1 $18) (11... Bg7 $11) 12. Bh6 $1 $14 {[%mdl 1024] White has compensation.} Nf5 13. Qd2 $1 Qb6 14. Rad1 $146 ({Predecessor:} 14. Rac1 Nxh6 15. Qxh6 Qd4 16. Nc4 Bg7 17. Nd6+ Kf8 18. Qg5 Bf6 19. Qh6+ Bg7 20. Qg5 {½-½ (20) Tatai,S-Baumbach,F (2413) ICCF email 2012}) 14... a6 ({Of course not} 14... Nxh6 15. Nc4 $14) 15. Bd3 $1 $36 {[%cal Rd3f5][%mdl 2048] White has the initiative.} Qxb2 $2 {[#]} (15... Nxh6 $11 {and Black has nothing to worry.} 16. Nc4 Qd8 17. Qxh6 d6) 16. Bxf5 $1 $18 {Strongly threatening Nc4.} Qxd2 ({But not} 16... gxf5 17. Qxb2 Bxb2 18. Nc4) 17. Rxd2 {Threatens to win with Nc4.} gxf5 $2 (17... d6) 18. Nc4 Kd8 19. d6 b5 20. Nb6 Rb8 21. Nd5 Re8 {and the idea ...Bb7 leaves Black hopeful.} 22. Nxf6 exf6 23. Rxe8+ Kxe8 24. Re2+ Kd8 25. Bg7 {Accuracy: White = 90%, Black = 28%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.23"]
[Round "4.10"]
[White "Dolezal, Cristian"]
[Black "Meza, Anahi"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2392"]
[BlackElo "2073"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,71,75,84,52,95,87,107,112,109,111,110,108,171,67,163,99,112,108,141,137,169,167,161,156,197,191,169,152,210,228,225,231,334,332,372,290,577,583,579,562,571,527,538,538,494,470,629,605,623,548,531,548,1003,985,29992,400]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. d5 Nbd7 8. Be3 Nc5 9. Nd2 a5 10. h4 {E93: King's Indian: Classical: Petrosian System with 7...Nbd7} c6 11. h5 a4 $146 ({Predecessor:} 11... Bd7 12. hxg6 fxg6 13. dxc6 Bxc6 14. Bxc5 dxc5 15. Nd5 b5 16. cxb5 Nxd5 17. Bc4 Kh8 18. exd5 Bxd5 {1-0 (55) Zubov,A (2626)-Losonczi,M (2242) Krakow 2017}) 12. h6 {White is better.} Bh8 13. Bxc5 dxc5 14. Nxa4 b5 (14... Qc7 $16) 15. Nc3 ({But not} 15. Nxc5 $6 bxc4 16. dxc6 (16. Bxc4 cxd5 17. exd5 Qb6 $14) 16... Qa5 $16) ({White has to play} 15. cxb5 $18 cxd5 16. Nxc5) 15... bxc4 ({Better is} 15... b4 $14) 16. Bxc4 ({White should try} 16. dxc6 $18 Qe8 17. Qc2 (17. Bxc4 Qxc6 18. Qe2 Rd8 $16)) 16... cxd5 $16 17. Nxd5 ({Don't play} 17. exd5 e4 $14) 17... Bb7 {[%cal Rf6d5] [#]} 18. Nc3 $1 Qa5 19. Qe2 Qb4 20. Rb1 Rad8 21. a3 Qa5 22. Nb3 Qb6 (22... Qc7 $16 23. O-O Nd7) 23. O-O $18 Nh5 24. g3 Qf6 (24... Bf6 {might work better.} 25. a4 Bg5) 25. Nxc5 Bc6 26. Bd5 Bxd5 $2 (26... Bd7 {keeps fighting.} 27. Nxd7 Rxd7) 27. Nxd5 Qg5 28. Qg4 Bf6 29. Nxf6+ Qxf6 30. Nd7 Rxd7 31. Qxd7 Qf3 32. Rbc1 {[%cal Bb1c1,Bc1c3,Bc3b3][%mdl 32] White wants to mate with Rc8.} Nf6 33. Qd6 Ng4 {intending ...Ne3.} 34. Rc3 Qe2 35. Rb3 {White threatens Rb8 and mate.} Nh2 {[#]} 36. Qd1 {Accuracy: White = 68%, Black = 12%.} (36. Qf6 $142 $1 {[%mdl 512]} Qxf1+ 37. Kxh2 Qxf2+ 38. Qxf2 Rc8 39. Qf6 Kf8 40. Rb7 Rc2+ 41. Kh3 Rh2+ 42. Kxh2 Kg8 43. Qg7#) 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.1"]
[White "Tristan, Leonardo"]
[Black "Quiroga, Facundo"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2504"]
[BlackElo "2267"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,88,2,0,3,0,0,2,8,2,6,-16,-12,-13,-14,-12,-17,-17,-8,-10,-10,-7,8,-6,-5,-27,66,-46,26,26,21,16,25,18,19,11,36,22,39,16,22,0,0,-8,-8,-8,-8,-16,0,-6,-3,-90,-85,-110,-91,-90,-87,-976,-1012,-1216,-1195,-1166,-1106,-1139,-1133,-1007,-962,-2178,-1921,-29970,-29972,-29977,-29979,-29979,-29977]} 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 g6 5. O-O Bg7 6. Bb5+ Bd7 7. Bxd7+ Nbxd7 8. Re1 O-O 9. d4 Rc8 {B50: Sicilian: 2...d6, Miscellaneous} 10. Bg5 $146 ({Predecessor:} 10. e5 dxe5 11. dxe5 Ng4 12. e6 Nde5 13. Nxe5 Nxe5 14. Qb3 Qc7 15. Nd2 c4 16. Qc2 f5 17. b3 cxb3 18. Qxb3 {0-1 (34) Akopian,V (2675)-Bok,B (2598) Doha 2016}) 10... cxd4 11. cxd4 Qb6 {The position is equal.} 12. Qe2 h6 13. Bxf6 Nxf6 14. Nc3 e6 15. Rad1 Rfd8 16. Rd2 d5 17. e5 Nd7 18. h4 Rc4 19. Nd1 Rdc8 20. h5 Rc1 (20... gxh5 $11 21. Nc3 a6) 21. Ne3 (21. hxg6 $14 fxg6 22. Nc3 Rxe1+ 23. Nxe1) 21... Qa6 ({Better is} 21... gxh5 $15 22. Rdd1 Rxd1 23. Rxd1 Qa6 24. Qxa6 bxa6) 22. Qxa6 bxa6 23. hxg6 fxg6 24. Rxc1 Rxc1+ 25. Kh2 Nb6 26. Rd3 a5 27. Nd2 a4 28. f4 Bf8 29. g4 a3 30. bxa3 Ra1 31. f5 Rxa2 {Threatening ...gxf5.} 32. fxe6 Rxa3 33. Rb3 {[#]} (33. Nb3 $1 $11) 33... Rxb3 $1 $17 34. Nxb3 {[%mdl 4096] Endgame [#] KBN-KNN} Bb4 $1 35. Nc5 Bc3 36. Nf5 $2 {[%mdl 8192]} (36. Nc2 $17) 36... gxf5 $19 37. gxf5 Bxd4 38. Nd3 Nc4 39. Kg3 Bxe5+ 40. Kg4 Bf6 {And now ...Ne5+ would win.} 41. Kh5 Kg7 42. Nf4 Ne3 {Black mates.} 43. e7 Bxe7 44. f6+ Kxf6 {Accuracy: White = 27%, Black = 57%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.1"]
[White "Tristan, Leonardo"]
[Black "Quiroga, Facundo"]
[Result "*"]
[ECO "A00"]
[WhiteElo "2504"]
[BlackElo "2267"]
[Annotator "TA"]
[PlyCount "35"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,18,0,0,-4]} 1. e4 c5 2. Nf3 d6 3. c3 Nf6 4. Be2 g6 5. O-O Bg7 6. Bb5+ Bd7 7. Bxd7+ Nbxd7 8. Re1 O-O 9. d4 Rc8 {B50: Sicilian: 2...d6, Miscellaneous} {Predecessor:} 10. e5 $146 dxe5 11. dxe5 Ng4 12. e6 Nde5 13. Nxe5 Nxe5 14. Qb3 Qc7 15. Nd2 c4 16. Qc2 f5 17. b3 cxb3 18. Qxb3 {0-1 (34) Akopian,V (2675)-Bok,B (2598) Doha 2016} *

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.2"]
[White "Della Morte, German"]
[Black "Perez, Maximiliano"]
[Result "*"]
[ECO "A00"]
[WhiteElo "2366"]
[BlackElo "2418"]
[Annotator "TA"]
[PlyCount "34"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,10,15,37]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. g3 d6 {Predecessor:} 6. Bg2 $146 Nbd7 7. Nc3 e5 8. O-O exd4 9. Nxd4 O-O 10. Nd5 Nxd5 11. cxd5 Bc5 12. Bc3 Re8 13. Qd2 Bb6 14. e4 Nc5 15. Qc2 Bd7 16. b3 Qc8 17. Rfe1 Bh3 {1-0 (34) Istratescu,A (2565)-Iordachescu,V (2597) Bucharest 2018} *

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.2"]
[White "Della Morte, German"]
[Black "Perez, Maximiliano"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2366"]
[BlackElo "2418"]
[Annotator "TA"]
[PlyCount "144"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,144,35,27,27,38,19,16,18,20,3,12,0,9,10,26,18,39,16,22,0,0,0,0,0,31,10,4,-2,25,0,15,-165,-159,-162,-151,-171,-169,-176,-135,-162,-134,-133,-5,0,-8,-24,-22,-13,-6,-33,0,0,0,-30,-25,-30,-31,-34,-19,-19,-8,-43,-8,-8,0,-8,-8,-37,-45,-122,-41,-45,-41,-55,-12,-12,-12,-41,-19,-19,-19,-27,-27,-41,-27,-51,-51,-52,-41,-122,-60,-122,-122,-122,-122,-122,-122,-126,-126,-126,-126,-126,-177,-177,-179,-179,-217,-217,-8,-29953,-29956,-29957,-29956,-29952,-29952,-29958,-29959,-29954,-29961,-29960,-29963,-29963,-29962,-29960,-29945,-29965,-29966,-29977,-29978,-29978,-29979,-29978,-29978]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. g3 d6 6. Bg2 Nbd7 7. O-O e5 8. Bc1 {E11: Bogo-Indian} (8. Be3 O-O 9. Qc2 exd4 10. Bxd4 Re8 11. Nc3 c6 12. Rad1 Qe7 13. a3 Bc5 14. Rfe1 h6 15. e4 Bxd4 16. Nxd4 {½-½ (70) Postny,E (2616)-Van Wely,L (2685) Novi Sad 2016}) 8... exd4 9. Nxd4 O-O 10. Qc2 {The position is equal.} a4 11. Nc3 Nb6 $146 ({Predecessor:} 11... Bc5 12. Rd1 Nb6 13. Rb1 Qe7 14. b4 axb3 15. axb3 c6 {½-½ (75) Dobrov,V (2510)-Diaz Camallonga,C (2437) Barcelona 2017}) 12. Nd5 Bc5 13. Nxb6 Bxb6 14. Nb5 Bc5 15. Rb1 h6 16. b4 axb3 $1 17. axb3 {[%cal Ba2b3,Bb3b4][%mdl 32]} c6 $36 {[%mdl 2048] Black is pushing.} 18. Nc3 Be6 19. b4 Ba7 20. b5 Qc7 21. Qb3 {Strongly threatening b6.} Bc5 22. Na4 $2 (22. Bb2 $11 {and White is okay.}) 22... cxb5 $1 $19 23. Nxc5 Bxc4 {[%mdl 64] Double Attack} ({Don't do} 23... Qxc5 24. Qxb5 Bxc4 25. Qxc5 $15) 24. Qc3 dxc5 25. Bxh6 Bxe2 ({Don't play} 25... gxh6 26. Qxf6 Bxe2 27. Rfe1 $17) 26. Rfe1 Rfe8 ({Reject} 26... gxh6 $6 27. Rxe2 Qb6 28. Re5 $11) 27. Bf4 Qb6 (27... Qa5 $17 28. Qxc5 Bd3 29. Rxe8+ Rxe8) 28. Be3 $1 $11 Bg4 {...Rac8 is the strong threat.} 29. Qxc5 Qxc5 30. Bxc5 Bf5 31. Rbc1 (31. Rxe8+ {keeps more tension.} Rxe8 32. Rd1 Rc8 33. Be3 Ng4 34. Bf4) 31... Be4 32. Bd4 Bxg2 33. Kxg2 (33. Rxe8+ {is more complex.} Nxe8 34. Kxg2 Rd8 35. Be3 Kf8 36. Bc5+) 33... Rxe1 34. Rxe1 {[%mdl 4096] Endgame KRB-KRN} Nd5 35. Kf3 b4 36. Rc1 Ra3+ 37. Ke4 Nc3+ (37... Ne7 {is interesting.} 38. Be3 f5+ 39. Kd4 Nc6+ 40. Kc4 Kf7) 38. Bxc3 $1 bxc3 {KR-KR} 39. Kd3 Ra2 40. Rxc3 Rxf2 {White must now prevent ...Rf3+.} 41. Rc8+ Kh7 42. Rc7 $1 b6 43. Ke3 Rxh2 (43... Rf6 {with more complications.} 44. h4 Kh6 45. Rc8 Rf5 46. g4 Rc5) 44. Rxf7 Rb2 45. Rb7 Rb3+ 46. Kf4 Rb4+ 47. Kg5 Rb5+ 48. Kg4 Kg6 49. Rc7 Rb4+ 50. Kf3 Kh6 51. Rc6+ (51. Re7 $15) 51... g6 (51... Kh5 $17 52. g4+ Kg5) 52. Rd6 (52. Kg2 $1 $15) 52... Kh5 $1 $17 53. Re6 Rb3+ 54. Kf2 g5 55. Re4 b5 {[%cal Bb6b5,Bb5b4,Bb4b3,Bb3b2][%mdl 32]} 56. Rd4 b4 57. Rc4 Rb2+ (57... Rb1 $17 {Hoping for ...b3.} 58. g4+ Kh4) 58. Ke3 $19 b3 59. Rb4 Rb1 {aiming for ...b2.} 60. Kf3 {If only White now had time for Rb6....} g4+ $2 ({Better is} 60... b2 $19 {( -> ...Rf1+)} 61. g4+ Kg6 62. Rb6+ Kf7) 61. Ke3 $2 {[%mdl 8192]} (61. Ke4 $11) 61... b2 {Black mates.} 62. Kd2 Kg5 63. Rb5+ Kf6 64. Kc2 Rg1 65. Kxb2 Rxg3 66. Kc2 {[#]} Re3 $1 67. Kd2 Re7 68. Ra5 Re4 69. Rb5 g3 70. Rb3 Rg4 71. Rb1 g2 72. Rg1 {[#]} Kg5 $1 {Accuracy: White = 45%, Black = 58%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.3"]
[White "Garcia Palermo, Carlos"]
[Black "Converset, Juan Jose"]
[Result "*"]
[ECO "A00"]
[WhiteElo "2407"]
[BlackElo "2227"]
[Annotator "TA"]
[PlyCount "35"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,21,49,53,49]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 O-O 6. Ng3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 a6 10. a4 Re8 {LiveBook: 40 Games. A65: Modern Benoni: 6 e4} 11. O-O {Predecessor:} h5 $146 12. Bg5 Qc7 13. f4 Nh7 14. Bh4 Nd7 15. e5 f5 16. Bxh5 gxh5 17. Qxh5 Rf8 18. e6 {0-1 (52) Bologan,V (2672)-Mamedov,R (2637) Khanty-Mansiysk 2013} *

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.3"]
[White "Garcia Palermo, Carlos"]
[Black "Converset, Juan Jose"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2407"]
[BlackElo "2227"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,81,26,44,67,68,69,67,84,73,73,63,79,73,62,50,145,118,117,19,9,13,160,144,190,195,189,193,180,172,413,103,571,592,599,588,564,598,602,597,595,589,595,583,582,586,905,906,904,891,841,691,979,954,954,941,889,883]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 O-O 6. Ng3 c5 7. d5 e6 8. Be2 exd5 9. cxd5 a6 10. a4 Re8 11. O-O Nbd7 12. Bg5 h6 13. Be3 h5 14. f3 Qc7 {A65: Modern Benoni: 6 e4} (14... h4 15. Nh1 Nh7 16. Nf2 g5 17. Qd2 Ne5 18. a5 Rb8 19. Na4 f5 20. exf5 Bxf5 21. Ra3 Rc8 22. Nc3 {1-0 (48) Atalik,S (2599)-Cvitan,O (2538) Paracin 2012}) 15. Qd2 Rb8 16. Rfc1 Ne5 {White is slightly better.} 17. h3 $146 ({Predecessor:} 17. Nh1 Qe7 18. Nf2 Bd7 19. a5 Nh7 20. h3 f5 21. Re1 Qh4 22. f4 Nf7 23. Bf3 b5 24. axb6 fxe4 25. Bxe4 {½-½ (38) Scripcaru,G (2305)-Ursan,P (2175) Baile Felix 2017}) 17... Qe7 18. Bg5 Qf8 19. f4 Ned7 20. e5 $36 {[%mdl 2048] Black is under pressure.} dxe5 (20... Nh7 $1 $14) 21. f5 $16 e4 22. d6 (22. fxg6 $16 fxg6 23. Rf1) 22... e3 $11 23. Bxe3 {Black should prevent fxg6.} Rxe3 (23... h4 $11 24. Nf1 gxf5) 24. Qxe3 $16 Ng4 25. Qe7 ({But not} 25. hxg4 $2 Bd4 $19) 25... Bd4+ 26. Kh1 Nf2+ 27. Kh2 {fxg6 is the strong threat.} Be5 $2 (27... h4) 28. Rd1 $2 (28. fxg6 $18 {has better winning chances.} fxg6 29. Bc4+ Kh8 30. Rf1) 28... gxf5 $2 {[%mdl 8192] [#]} (28... Nxd1 $16 {is tougher.} 29. Rxd1 Bf6) 29. Rd5 $1 $18 {[%cal Rd5e5] White is clearly winning.} Qg7 {[#]} 30. Rxe5 $1 {[%mdl 512]} Qxe5 (30... Nxe5 31. Nxh5) 31. Rf1 f4 32. Nxh5 f3+ 33. Qxe5 Nxe5 34. Rxf2 fxe2 35. Rxe2 Nd7 36. Re8+ Kh7 37. Nd5 b5 38. axb5 axb5 39. Nhf6+ Nxf6 40. Nxf6+ Kg7 41. Ne4 {Accuracy: White = 50%, Black = 36%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.4"]
[White "Romero Barreto, Jaime Jose"]
[Black "Ricardi, Pablo"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2337"]
[BlackElo "2485"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,65,19,28,6,16,8,22,0,21,13,33,15,34,12,50,6,4,14,31,0,52,50,125,97,117,113,84,90,119,37,148,145,141,108,85,0,0,0,0,-112,255,0,793,787,770,770,1082,1080,1083,1033,1028,980]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8. O-O Nbd7 9. Bf3 {B92: Sicilian Najdorf: 6 Be2} Rc8 10. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Be7 11. a5 {The position is equal.} O-O 12. Be3 Re8 13. Re1 (13. Qd2 Rc4 14. Rfd1 Bf8 15. Qd3 Rb4 16. Qd2 Rc4 17. Qe1 Qc7 18. Be2 Rc6 19. f3 {1-0 (89) Nakamura,H (2792)-Nepomniachtchi,I (2751) Saint Louis 2017}) 13... Qc7 14. Nc1 Bf8 $146 ({Predecessor:} 14... b6 15. axb6 Nxb6 16. Nd3 Qb7 17. h3 Bd8 18. Bg5 Nbd7 19. Qd2 h6 20. Be3 Nb6 21. b3 Qc7 22. Nb1 d5 23. Bxb6 Qxb6 24. exd5 Nxd5 25. Nxe5 Bg5 26. Qa5 {½-½ (26) Sherwood,R (2310)-Waller,A (2238) ICCF email 2015}) 15. Nd3 d5 16. exd5 Bf5 17. Ra4 (17. g4 $5 {[%cal Rg4f5]} e4 18. gxf5 exd3 19. cxd3 $16 (19. Qxd3 Ne5 $11)) 17... e4 (17... Bd6 $11) 18. Bf4 $14 exd3 (18... Qd8 $1 $14 19. Nxe4 Bxe4 20. Bxe4 b5 21. axb6 Nxb6) 19. Bxc7 dxc2 20. Qc1 Rxe1+ 21. Qxe1 {Hoping for Bb6.} Rxc7 22. Na2 (22. Ra1 $1 $16) 22... Nc5 (22... Ne5 $1 $14 23. Be2 Nxd5) 23. Rc4 $16 Nd3 24. Qc3 $1 Re7 25. g4 (25. Kf1 $16) 25... Re1+ $11 26. Kg2 Bg6 {Threatens to win with ...Ra1.} 27. Qb3 ({But not} 27. Qxc2 $2 Nf4+ $1 {[%mdl 512]} 28. Rxf4 Bxc2 $19) (27. d6 $11 {remains equal.}) 27... Bd6 $2 {[%mdl 8192] [#]} (27... Ra1 $17 {stays on course. White must now prevent ...Nd7.} 28. Rc8 Nd7) 28. Qxb7 $2 (28. Rc8+ $1 $18 Re8 29. Rxe8+ Nxe8 30. Kg1) 28... Nf4+ $2 {[%mdl 8192] [#]} (28... h6 $11) 29. Rxf4 $1 $18 {[%mdl 64] Deflection, Decoy. White is clearly winning.} Bxf4 {[#]} 30. Qb4 $1 Re4 31. Bxe4 Nxe4 32. f3 Bd6 33. Qb6 {Accuracy: White = 41%, Black = 27%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.4"]
[White "Romero Barreto, Jaime Jose"]
[Black "Ricardi, Pablo"]
[Result "*"]
[ECO "A00"]
[WhiteElo "2337"]
[BlackElo "2485"]
[Annotator "TA"]
[PlyCount "30"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,18,8,31,11,8]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8. O-O Nbd7 9. Bf3 {B92: Sicilian Najdorf: 6 Be2} (9. a4 Rc8 10. Re1 Be7 11. Bf3 O-O 12. a5 Nc5 13. Be3 Qc7 14. Nd2 Bd7 15. Nf1 b5 16. axb6 Qxb6 17. Rb1 {0-1 (60) Alekseev,E (2610)-Kantans,T (2473) Minsk 2017}) 9... Rc8 {Predecessor:} 10. Bg5 $146 Qc7 11. Qd2 Be7 12. Rad1 O-O 13. g3 Rfe8 14. Be2 h6 15. Be3 Ng4 {½-½ (40) Ziembinski,M-Kwapisz,S Krakow 1953} *

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.5"]
[White "Benedetti, Julio"]
[Black "Hungaski, Robert"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2281"]
[BlackElo "2505"]
[Annotator "TA"]
[PlyCount "160"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,160,27,30,27,27,38,26,17,4,14,2,37,4,4,9,14,11,15,21,26,25,29,25,25,25,108,108,108,108,108,110,140,152,137,141,160,152,158,116,116,116,116,108,117,117,117,117,117,112,117,104,101,91,103,101,103,91,104,103,97,93,94,34,34,34,48,26,19,19,19,19,19,19,48,48,89,33,48,33,48,48,48,162,244,243,196,178,227,48,48,48,48,48,89,48,89,89,50,50,89,89,89,89,89,89,89,89,89,21,29,29,89,89,89,3,89,89,89,89,89,89,89,89,89,89,89,89,89,89,89,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,8,0,0,0,0,0,0]} 1. e4 d6 2. d4 Nf6 3. Nc3 e5 4. Nf3 Nbd7 5. Bc4 Be7 6. O-O Nb6 {C41: Philidor Defence} 7. Be2 exd4 8. Qxd4 O-O {White has an edge.} 9. h3 c6 10. a4 a5 11. Bf4 $146 ({Predecessor:} 11. Be3 Nbd7 12. Rfd1 Qc7 13. Bf4 Ne8 14. e5 {1-0 (41) Najer,E (2646)-Motylev,A (2686) Moscow 2014}) 11... d5 12. exd5 Nbxd5 13. Nxd5 Qxd5 14. Bc4 $36 {[%mdl 2048] Black is under pressure.} Qxd4 15. Nxd4 Rd8 16. Rad1 Nd5 17. Be5 Bd6 (17... Bc5 $11) 18. Bxd6 $1 $16 Rxd6 {[#]} 19. Nb5 $1 {[%cal Rb5d6][%mdl 512]} cxb5 20. Bxd5 Rb6 21. axb5 Be6 22. c4 a4 23. Rfe1 Kf8 24. Bxe6 Rxe6 25. Rxe6 fxe6 {[%mdl 4096] Endgame KR-KR} 26. Kf1 Ke7 27. Ke2 a3 28. bxa3 Rxa3 29. Rd4 b6 30. g3 Ra2+ 31. Ke3 Rc2 32. Rh4 h6 33. Rg4 g5 34. h4 Kf6 35. Rd4 Ke7 36. Kf3 (36. h5 $16) 36... e5 $1 $14 {[%cal Re5d4]} 37. Rd5 Rc3+ 38. Kg2 {Hoping for hxg5.} Ke6 39. hxg5 hxg5 40. Rd8 Rxc4 41. Rb8 g4 42. Rxb6+ Kd5 43. Rb8 (43. Rg6 $16) 43... Rb4 44. b6 {[%cal Bb5b6,Bb6b7][%mdl 32]} Ke4 45. b7 {Kf1 is the strong threat.} Rb1 46. Kh2 Rb6 (46... Rb2 $142) 47. Kg1 $1 $18 Rb1+ 48. Kg2 Rb6 {If only Black now had time for ...Rb1....} 49. Rg8 $2 (49. Kf1 $18) 49... Rxb7 $14 50. Rxg4+ Kf5 51. Ra4 Rb2 52. Ra8 Rb3 53. Rf8+ Kg5 54. Rf3 Rb1 55. Re3 Kf5 56. Kf3 Rg1 {[#]} 57. g4+ $1 {[%mdl 512]} Kf6 (57... Rxg4 58. Rxe5+) 58. Rb3 Ra1 59. Rb8 (59. Ke3 $16) 59... Ra3+ 60. Kg2 Kg5 {[#]} (60... e4 $1 $11) 61. f3 $1 $16 Kf6 62. Re8 (62. Kf2 $16) 62... Ra1 (62... Ra2+ $1 $11 {remains equal.} 63. Kh3 Ra3) 63. Rf8+ Ke7 64. Rf5 Ke6 65. Rh5 Ra2+ 66. Kg3 Ra3 67. Rh6+ Kf7 {[#]} 68. Kf2 $1 Rb3 69. Rc6 Ra3 70. g5 (70. Rd6 $16) 70... Rb3 $11 {The position is equal.} 71. Rf6+ Ke7 $1 72. Rf5 Ke6 $1 {[%cal Re6f5]} 73. Rf8 Ke7 74. Ra8 Kf7 75. Ra6 Rc3 76. Rh6 Ra3 77. Rf6+ Ke7 $1 78. f4 exf4 79. Rxf4 Ra5 80. Rg4 Kf7 {Accuracy: White = 61%, Black = 61%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.6"]
[White "Acosta, Pablo Ismael"]
[Black "Contin, Daniel"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2467"]
[BlackElo "2236"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,71,-14,-13,-2,-31,-29,-47,-10,-33,-21,-19,0,-6,0,-11,10,-48,-2,-9,30,18,24,15,66,39,40,39,46,53,50,36,53,33,47,51,121,134,363,334,357,355,347,344,328,328,369,417,419,403,916,892,1439,1371,1221,1185,1137,968,29998,29999]} 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. e3 e6 6. Nge2 Nge7 7. Nf4 O-O 8. O-O Rb8 {A36: Symmetrical English vs ...g6: 4 Bg2 Bg7} (8... a6 9. d3 Rb8 10. Bd2 b5 11. b3 b4 12. Ne4 d6 13. Rb1 e5 14. Ne2 f5 15. Ng5 h6 16. Nh3 {½-½ (38) Hillarp Persson,T (2511)-Goganov,A (2637) Stockholm 2016}) 9. a3 b6 10. b4 $146 ({Predecessor:} 10. Qc2 Bb7 11. d3 Ne5 12. e4 N5c6 13. Nfe2 Nd4 14. Nxd4 cxd4 15. Ne2 d5 16. exd5 exd5 17. cxd5 Nxd5 {0-1 (31) Slaba,A (1648)-David,B (1922) Kouty nad Desnou 2015}) 10... Bb7 {Black is slightly better.} 11. Rb1 d6 12. Qe2 Bxc3 13. dxc3 Ne5 14. b5 Bxg2 15. Kxg2 ({White should try} 15. Nxg2 $11 d5 16. cxd5) 15... Qc7 16. e4 Qb7 17. h4 Nf5 18. Nh3 h5 (18... f6 $11) 19. f3 Ng7 20. Rd1 Rbd8 21. Bf4 f6 22. Bxe5 dxe5 23. Rd3 Kf7 24. Rbd1 Ke7 {[#]} ({Black should play} 24... Qc7 $14) 25. f4 $1 $16 Nf5 $2 (25... f5 $16 {is a better defense.}) 26. fxe5 $18 fxe5 27. Rxd8 Rxd8 28. Rxd8 Kxd8 {[#]} 29. Qf3 $1 Ne7 30. Qf8+ Kd7 31. Ng5 Qc7 (31... a6 $142 32. Qf7 axb5 33. cxb5 Qc7 34. Qxe6+ Ke8) 32. Nf7 Nc8 33. Qh8 Ne7 34. Nxe5+ Kd6 35. Qf8 Qb7 36. Nf7+ {Accuracy: White = 64%, Black = 19%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.6"]
[White "Acosta, Pablo Ismael"]
[Black "Contin, Daniel"]
[Result "*"]
[ECO "A00"]
[WhiteElo "2467"]
[BlackElo "2236"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,12,8,8]} 1. c4 c5 2. Nc3 g6 3. g3 Bg7 4. Bg2 Nc6 5. e3 e6 6. Nge2 Nge7 {Predecessor:} 7. O-O $146 O-O 8. d4 cxd4 9. exd4 d5 10. cxd5 Nxd5 11. Nxd5 exd5 12. Be3 Be6 13. Qd2 Re8 14. Nf4 Qd7 15. Rfe1 Ne7 16. Nxe6 Qxe6 17. Bf4 Qd7 18. Be5 Nc6 19. Bxg7 Kxg7 20. h4 h6 21. Qf4 Rad8 22. Rad1 Rxe1+ 23. Rxe1 Qd6 24. Qd2 Qf6 25. Rd1 Qd6 26. Re1 Qf6 27. Rd1 Qd6 28. Re1 {½-½ (28) Matlakov,M (2700)-Grischuk,A (2771) St Petersburg 2018} *

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.7"]
[White "Fiora, Emilio"]
[Black "Slipak, Sergio"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2227"]
[BlackElo "2427"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,84,5,5,5,5,5,5,0,5,3,43,30,29,17,22,-23,-9,-11,-3,0,24,-28,-31,-30,-42,-42,-25,-78,-59,-68,-13,-66,20,-126,-97,-97,83,-173,-111,-238,-117,-136,-127,-143,-113,-172,-179,-174,-177,-172,-129,-143,-129,-130,-127,-181,-158,-360,-365,-388,-364,-764,-764,-755,-750,-716,-706,-685,-683,-900,-395,-512,-493,-499,-466,-401,-383]} 1. e4 c6 2. d4 d5 3. f3 e6 4. Nc3 Bb4 5. Nge2 Nf6 (5... Ne7 6. Be3 O-O 7. Qd2 Nd7 8. Ng3 Qa5 9. a3 b6 10. Bd3 Bxc3 11. bxc3 Ba6 12. O-O c5 13. Bxa6 Qxa6 {½-½ (60) Piorun,K (2586)-Tomczak,J (2585) Poland 2015}) 6. e5 {B12: Caro-Kann: Advance Variation} Nfd7 7. Be3 b6 8. a3 {The position is equal.} Be7 9. f4 Ba6 10. g3 O-O $146 ({Predecessor:} 10... Nf8 11. Bh3 c5 12. f5 Nc6 13. fxe6 fxe6 {0-1 (67) Bodnaruk,A (2372)-Molchanova,T (2368) St Petersburg 2009}) 11. Bh3 g6 12. f5 exf5 13. Qd2 Bxe2 14. Nxe2 Na6 15. Nf4 (15. O-O-O $142) 15... Nc7 16. O-O-O b5 17. Rhg1 Nb6 18. g4 (18. Qe2 $11 {remains equal.}) 18... Nc4 $17 19. Qd3 fxg4 (19... b4 $15 20. a4 Nxe3 21. Qxe3 fxg4 22. Rxg4 Bg5) 20. Rxg4 $11 Bg5 (20... Nxe3 $15 21. Qxe3 Bg5) 21. Ng2 (21. Rdg1 $11 {keeps the balance.} Bh6 22. R4g3) 21... Bxe3+ 22. Nxe3 f5 $2 {[#]} (22... Ne6 $17 {and life is bright.}) 23. Rgg1 $2 {[%mdl 8192]} (23. Nxf5 $1 $16 {Threatens to win with Nh4.} Ne6 24. Qg3) 23... Ne6 ({Better is} 23... Kh8 $19 24. Qc3 Qh4 25. Nxc4 bxc4) 24. Kb1 (24. Nxf5 $17 Kh8 25. Nd6) 24... Nxe3 (24... Nf4 $19 {has better winning chances.} 25. Qf1 Nxe3 26. Qxf4 Nxd1 27. Rxd1 a5) 25. Qxe3 $17 Qh4 26. Rd2 Rae8 27. Qg3 (27. Bg2 $17 {was worth a try.}) 27... Qxg3 $19 28. hxg3 Ng5 29. Bg2 Ne4 30. Bxe4 fxe4 $17 {[%mdl 4096] Endgame KRR-KRR} 31. g4 Rf4 32. Rg3 (32. Re2 $17 {might work better.}) 32... Rf3 33. Rxf3 $2 (33. Rg1 $17) 33... exf3 {KR-KR} 34. Rf2 Rf8 35. c3 $2 (35. g5 h6 36. e6) 35... g5 $19 36. e6 Rf4 37. Kc2 Kf8 38. Kd2 Ke7 39. Ke1 Rf6 (39... h5 $142 40. Rc2 Rxg4) 40. Rh2 {[#]} f2+ $1 {[%mdl 512]} 41. Kf1 (41. Rxf2 Rxf2) 41... h6 42. Rh3 Kxe6 {Accuracy: White = 36%, Black = 42%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.7"]
[White "Fiora, Emilio"]
[Black "Slipak, Sergio"]
[Result "*"]
[ECO "A00"]
[WhiteElo "2227"]
[BlackElo "2427"]
[Annotator "TA"]
[PlyCount "25"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,16,3,6,11,6,-6,0,-6,0]} 1. e4 c6 2. d4 d5 3. f3 e6 4. Nc3 Bb4 5. Nge2 Nf6 {The position is equal.} (5... Ne7 6. Be3 O-O 7. Qd2 Nd7 8. Ng3 Qa5 9. a3 b6 10. Bd3 Bxc3 11. bxc3 Ba6 12. O-O c5 13. Bxa6 Qxa6 {½-½ (60) Piorun,K (2586)-Tomczak,J (2585) Poland 2015}) 6. e5 {B12: Caro-Kann: Advance Variation} Nfd7 7. Be3 b6 8. a3 Be7 {Predecessor:} 9. Nb1 $146 Ba6 10. c3 c5 11. g3 O-O 12. Bh3 Bxe2 13. Qxe2 {1-0 (31) Ljubarskij,J (2341)-Hvenekilde,J (2181) Arvier 2006} *

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.8"]
[White "Molina, Pablo Sebastian"]
[Black "Dolezal, Cristian"]
[Result "*"]
[ECO "A00"]
[WhiteElo "2277"]
[BlackElo "2392"]
[Annotator "TA"]
[PlyCount "22"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,12,35,32,35,41]} 1. e4 c6 2. Nf3 d6 3. d4 Nf6 4. Bd3 e5 5. h3 Nbd7 6. c3 {B07: Pirc Defence: Miscellaneous Systems} Be7 {Predecessor:} 7. a4 $146 O-O 8. O-O Qc7 9. Re1 a5 10. Nbd2 Re8 11. Nf1 Bf8 {½-½ (24) Kozlov,A (2163)-De Santis,A (2305) Bad Woerishofen 2010} *

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.8"]
[White "Molina, Pablo Sebastian"]
[Black "Dolezal, Cristian"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2277"]
[BlackElo "2392"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,87,39,35,19,50,49,52,31,50,27,35,29,28,-37,0,0,11,-3,0,-7,-21,-11,-10,-14,-15,-13,4,-88,-60,-70,-42,-27,-30,-50,-40,-43,-33,-42,-42,-35,-35,-27,-31,-32,0,0,0,0,0,0,8,8,58,0,0,0,148,145,156,132,620,618,601,610,602,583,745,737,705,683,559,546,530,513,1857,1688,29992,29993,29993,29994]} 1. e4 c6 2. Nf3 d6 3. d4 Nf6 4. Bd3 e5 5. h3 Nbd7 6. c3 {B07: Pirc Defence: Miscellaneous Systems} Be7 7. O-O O-O 8. a4 {White is slightly better.} b6 $146 ({Predecessor:} 8... Qc7 9. Re1 a5 10. Nbd2 Re8 11. Nf1 Bf8 {½-½ (24) Kozlov,A (2163)-De Santis,A (2305) Bad Woerishofen 2010}) 9. Qe2 Re8 10. Rd1 Qc7 11. Na3 (11. Qc2 $11) 11... Bf8 12. dxe5 dxe5 13. Bc4 Nc5 14. Ng5 Re7 15. Qc2 h6 16. b4 hxg5 17. bxc5 g4 18. h4 (18. hxg4 $11 Bxg4 19. f3) 18... g3 19. fxg3 Rd7 20. Rf1 $1 ({Much weaker is} 20. Be3 Ng4 $17) 20... Bxc5+ 21. Kh1 Rd6 22. Bg5 Bg4 23. Bxf6 $1 Rxf6 ({But not} 23... gxf6 24. Be2 $14) 24. Rxf6 gxf6 25. Be2 Be6 26. Bc4 Rd8 27. Bxe6 fxe6 28. Qe2 Qg7 29. Kh2 Qg6 30. Nc4 Kg7 31. Rd1 ({Better is} 31. Nb2 $14) 31... Bf2 32. Rd3 b5 {[#]} (32... Rxd3 $11 33. Qxd3 Qe8) 33. Rf3 $1 $16 Bc5 34. Na5 {Hoping for Nb7.} bxa4 $2 {[%mdl 8192]} (34... Rc8 $16) 35. Nb7 $18 {[%mdl 64] Double Attack} Be7 36. Nxd8 Bxd8 {[%mdl 4096] Endgame KQR-KQB} 37. Qd1 Bb6 38. Qd7+ Qf7 39. Qxc6 a3 40. c4 Qe7 41. Rd3 {[#] Black must now prevent Rd7.} a2 (41... Bd4 $142 42. Qa4 f5 43. Qxa3 Qxa3 44. Rxa3 fxe4) 42. Rd7 a1=Q 43. Rxe7+ Kh6 44. c5 {Accuracy: White = 60%, Black = 43%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.9"]
[White "Ocantos, Manuel"]
[Black "Fiorito, Fabian"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2217"]
[BlackElo "2366"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,58,21,25,32,27,28,-6,0,0,0,0,4,0,17,0,25,0,7,0,11,14,38,20,49,0,66,47,42,42,52,35,172,147,237,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Bg5 Na6 7. Qd2 c6 8. Nf3 e5 9. d5 {E73: King's Indian: Averbakh Variation without 6...c5} (9. O-O exd4 10. Nxd4 Nc5 11. f3 Nfxe4 12. Nxe4 Nxe4 13. fxe4 Bxd4+ 14. Qxd4 Qxg5 15. Qxd6 Rd8 16. Qa3 Rd2 17. Rfe1 Be6 18. Qc3 Rad8 {0-1 (27) Agdestein,S (2567)-Bacrot,E (2714) Tromsoe 2013}) 9... cxd5 10. cxd5 {LiveBook: 4 Games} Bd7 11. O-O {White is slightly better.} Nc5 $146 ({Predecessor:} 11... Qb8 12. Rab1 Nc5 13. Bxf6 Bxf6 14. b4 Na6 15. Qb2 b5 16. Bd3 Qb6 {1-0 (56) Goltseva,E (2205)-Pogorelskikh,S (1964) Sochi 2017}) 12. Bxf6 Bxf6 13. b4 Na6 14. Nb5 Bg4 15. a4 Bxf3 16. Bxf3 Bg5 17. Qb2 f5 18. Ra3 fxe4 19. Bxe4 Rf4 20. Qb1 $36 {[%mdl 2048] next Bxg6! is good for White. White has the initiative.} Kg7 21. Rg3 Bh4 (21... Rc8 $11) 22. Rc3 {[#] Threatens to win with g3.} Rf7 23. g3 Bf6 24. h4 {Strongly threatening h5!} Kh8 (24... Nc7 $14) 25. Rfc1 $18 Qb6 {[#]} (25... Be7 $16) 26. Bxg6 $2 ({White has to play} 26. Rc8+ $1 $18 Rf8 27. Rxa8 Rxa8 28. Qb3) 26... hxg6 $11 {The position is equal.} 27. Qxg6 Raf8 $1 {And now ...Bg7 would win.} 28. Rf3 Qd8 29. Rc4 Rg7 {Precision: White = 43%, Black = 41%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.9"]
[White "Ocantos, Manuel"]
[Black "Fiorito, Fabian"]
[Result "*"]
[ECO "A00"]
[WhiteElo "2217"]
[BlackElo "2366"]
[Annotator "TA"]
[PlyCount "15"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,15,0,0,-37,-17,-52,-43,-40]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Qd2 (5. Be2 O-O 6. Bg5 Na6 7. Qd2 e5 8. d5 c6 9. f3 cxd5 10. cxd5 Bd7 11. Rc1 Qa5 12. Nb5 Qxd2+ 13. Bxd2 Ne8 14. b4 f5 15. Nh3 Bf6 16. Nf2 Bd8 17. a4 Bb6 18. Rf1 Nac7 19. Nxc7 Nxc7 {0-1 (40) Le,Q (2714)-Guseinov,G (2664) chess.com INT 2019}) 5... O-O 6. Qg5 $146 {E70: King's Indian: Miscellaneous lines with 4 e4, including 5 Nge2 and 5 Bd3 0-0 6 Nge2} ({Predecessor:} 6. Be2 c5 7. Nf3 b6 8. O-O Bb7 9. b3 Nxe4 10. Nxe4 Bxe4 11. Bb2 Nc6 {0-1 (20) Kawalek,T-Gardolinski,M Kolobrzeg 2001}) 6... Na6 7. Qd2 c6 8. Nf3 *

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.10"]
[White "Postolski, Javier"]
[Black "Zapata Charles, Santiago"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2014"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,58,5,5,-6,-17,-65,-46,-55,-52,-115,-107,-120,-62,-212,-183,-202,-220,-296,-325,-302,-298,-272,-312,-396,-392,-637,-511,-673,-679,-645,-680,-714,-415,-387,-377,-383,-364,-370,-366,-358,-356,-347,-317,-750,-712,-1893,-1654,-29996,-1474,-1389,-1355]} 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bd3 c5 6. Bb5+ {C01: French: Exchange Variation} (6. Bg5 c4 7. Be2 Be7 8. Bf3 Nc6 9. Nge2 Be6 10. Nf4 O-O 11. O-O h6 12. Bh4 Qd7 13. Bxf6 Bxf6 14. Ncxd5 Bxd4 {1-0 (34) Moiseenko,V (2547)-Bykov,O (2353) Kolomna 2018}) 6... Nc6 7. Qe2+ Be7 8. Nf3 {Black is slightly better.} O-O 9. Bxc6 ({Better is} 9. Be3 $15) 9... bxc6 $17 10. Be3 Qb6 $146 (10... Re8 $17 11. O-O Bd6 12. dxc5 Bxc5 $1 {[%mdl 576] Pin}) ({Predecessor:} 10... cxd4 11. Nxd4 Bd7 12. Nb3 c5 13. Bg5 d4 14. Bxf6 Bxf6 {0-1 (37) Parpinel,M (2157)-Naumkin,I (2443) Florence 2012}) 11. Qd2 ({White should play} 11. dxc5 $1 $15 Qxb2 12. O-O) 11... Ba6 $36 {[%mdl 2048] Black is really pushing.} ({Resist} 11... Qxb2 12. O-O $17) 12. Na4 Qb5 13. Nc3 Qxb2 14. Rb1 Qa3 15. Rb3 Qa5 16. Ne5 Qc7 17. f3 $2 (17. Ra3 Bb7 18. Rb3) 17... Bd6 {Hoping for ...cxd4.} 18. f4 cxd4 19. Qxd4 Rfe8 20. Na4 Bxe5 21. fxe5 Rxe5 {aiming for ...Re4.} 22. Nc5 Bc4 23. Rb7 Qa5+ {[%mdl 64] Double Attack} 24. Kd1 Rae8 25. Bd2 Qxa2 {Threatens to win with ...Bb5.} 26. Nd7 $2 (26. Qb2) 26... Nxd7 $19 27. Rxd7 Re4 {( -> ...Qb1+)} 28. Qxa7 Be2+ (28... Qb1+ $142 29. Bc1 {[#]} Bb3 $1 {[%mdl 512]} 30. cxb3 Qxb3+ 31. Kd2 Re2#) 29. Kc1 Ra4 {Accuracy: White = 19%, Black = 64%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.25"]
[Round "5.10"]
[White "Postolski, Javier"]
[Black "Zapata Charles, Santiago"]
[Result "*"]
[ECO "A00"]
[WhiteElo "2014"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "20"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,9,0]} 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nc3 Nf6 5. Bd3 {Predecessor:} Nc6 $146 6. Nge2 Nb4 7. O-O Nxd3 8. Qxd3 Be7 9. Ng3 O-O 10. Re1 c6 {½-½ (10) Nigmatov,O (2438)-Levin,E (2543) Tashkent 2018} *

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.1"]
[White "Perez, Maximiliano"]
[Black "Romero Barreto, Jaime Jose"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2418"]
[BlackElo "2337"]
[Annotator "TA"]
[PlyCount "40"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,40,12,12,28,15,28,0,18,18,5,7,18,15,26,17,35,17,164,169,174,165,177,171,147,163,188,0,30,0,171]} 1. e4 e5 2. Nf3 Nc6 {[%cal Bb8c6,Bc6e7,Be7g6][%mdl 32]} 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. c3 O-O 7. h3 Ne7 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} (7... h6 8. Re1 a5 9. Bb3 Re8 10. Nbd2 Be6 11. Ba4 Qb8 12. Nf1 b5 13. Bc2 Qb6 14. Qe2 Rad8 15. Ng3 d5 16. Nh4 {½-½ (52) Wang,H (2730)-Cheparinov,I (2709) St Petersburg 2018}) 8. Re1 Ng6 9. Nbd2 c6 10. d4 Bb6 11. Bf1 Re8 12. dxe5 Nxe5 13. Nxe5 Rxe5 14. Bd3 Bxh3 $146 (14... d5 $11 {and Black is okay.}) ({Predecessor:} 14... Qe8 15. Nc4 Re6 16. Nxb6 axb6 17. f3 d5 18. Bf4 dxe4 19. fxe4 h6 20. Qc2 {½-½ (20) Aranovitch,E (2333)-Lucaroni,M (2262) Spoleto 2011}) 15. gxh3 $18 Rg5+ 16. Kf1 $1 Qd7 17. Qf3 Rh5 {[#]} 18. Kg2 $1 Rg5+ {[#]} 19. Kf1 $2 ({Only move:} 19. Kh2 $1 $18) 19... Rh5 $11 20. Kg2 (20. Qg2 $11) 20... Rg5+ {Accuracy: White = 59%, Black = 35%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.2"]
[White "Quiroga, Facundo"]
[Black "Garcia Palermo, Carlos"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2267"]
[BlackElo "2407"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,94,-16,0,-2,5,-55,-43,-43,-43,-37,-40,-35,-39,-53,-55,-81,-18,-14,0,14,0,0,0,-38,127,127,125,94,124,132,232,156,139,95,90,101,106,102,210,216,274,287,385,373,352,385,708,300,261,200,192,52,52,52,53,53,266,197,194,195,206,204,207,132,472,414,872,807,773,760,1439,640,1263,364,353,170,29998,8,8,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bg5 h6 5. Bh4 c5 6. d5 exd5 7. cxd5 {E30: Nimzo-Indian: Leningrad Variation} d6 8. a3 ({Better is} 8. e3 $11) (8. e3 O-O 9. Bd3 Nbd7 10. Nge2 a6 11. a3 Ba5 12. O-O b5 13. b4 Bb6 14. Bg3 Qe7 15. bxc5 Bxc5 16. Nd4 Bxd4 17. exd4 Nb6 18. Bh4 {1-0 (35) Rapport,R (2605)-Antipov,M (2462) Athens 2012}) 8... Bxc3+ $1 $15 9. bxc3 {Black is slightly better.} Nbd7 10. f3 Qa5 11. Rc1 $146 ({Predecessor:} 11. Bxf6 Nxf6 12. e4 Qxc3+ 13. Kf2 O-O 14. Ne2 Qe5 {0-1 (43) Rieger,P-Kaposztas,M (2235) Ajka 1998}) 11... O-O 12. e4 Re8 13. Ne2 b6 (13... Nxe4 $17 14. fxe4 Rxe4) 14. g4 g5 15. Bg3 Ne5 16. Bxe5 Rxe5 17. h4 {[#]} Bd7 $2 (17... Bxg4 $1 $15 {[%mdl 512] stays ahead.} 18. fxg4 Nxe4 19. hxg5 Rae8) 18. hxg5 $16 hxg5 19. Qd2 Rae8 20. Ng3 Qxa3 (20... Kf8 $16 {was called for.}) 21. Be2 {Kf2 is the strong threat.} c4 22. Kf2 $40 {[%mdl 128] White wants a kill.} Qc5+ 23. Kg2 {And now Nf5 would win.} Kf8 24. Rh6 Nxd5 (24... Ke7 $16 {was necessary.}) 25. exd5 $18 Rxd5 26. Qc2 Qe3 {and if ...Rd2 works, Black does fine.} 27. Rd1 Rxd1 28. Qxd1 Qxc3 $2 (28... Qe5 29. Rxd6 Ba4) 29. Rxd6 (29. Qxd6+ $142 Re7 30. Rh7) 29... Be6 30. Rd8 Qe5 31. Rxe8+ ({Only move:} 31. Rd4 $1 $18) 31... Kxe8 $14 32. Qa4+ b5 33. Qxa7 Qb2 $2 (33... f5 $1 $14) 34. Qb8+ Kd7 35. Qb7+ Kd8 {[#]} 36. Qb6+ $1 Kd7 37. Kf2 {Threatens to win with Ne4.} b4 $2 {[%mdl 8192]} (37... Qe5 $16 38. Bd1 Qd5) 38. Ne4 b3 (38... Qe5 $142 39. Qxb4 Qh2+ 40. Ke1 Qg1+ 41. Kd2 Qd4+ 42. Kc2 Kc6) 39. Qb7+ $18 Ke8 40. Qb8+ Ke7 41. Qb4+ (41. Qd6+ $142 Ke8 42. Kg3) 41... Ke8 {intending ...Qd4+.} 42. Nd6+ $2 (42. Qd6 Qa1 {[#]} 43. Bxc4 $1 {[%mdl 512]} Bxc4 44. Nf6+ Qxf6 45. Qxf6) 42... Kd7 {aiming for ...Qd4+.} 43. Nb5 (43. Nxc4 $142 Bxc4 44. Qxc4) 43... Qf6 $2 (43... Qe5 $18) 44. Nc3 $2 (44. Qd6+ {mates} Ke8 45. Nc7#) 44... Qd4+ $11 {The position is equal.} 45. Ke1 Qg1+ 46. Kd2 {Hoping for Qb5+.} Qd4+ 47. Ke1 Qg1+ {Accuracy: White = 43%, Black = 32%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.3"]
[White "Slipak, Sergio"]
[Black "Acosta, Pablo Ismael"]
[Result "1-0"]
[ECO "E43"]
[WhiteElo "2427"]
[BlackElo "2467"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,95,9,0,27,19,15,18,80,79,85,73,87,79,61,46,58,68,88,88,71,57,89,44,83,33,39,25,20,22,62,68,98,0,14,-47,-8,-26,11,11,11,12,7,0,22,0,33,24,20,0,239,239,231,235,301,186,209,178,340,320,723,747,740,740,690,716,533,666,648,645,585,499,598,525,696,607,606,595,754,754,5313,5302,29972,1732]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Bd2 O-O 5. Nf3 b6 6. e3 Bb7 7. Bd3 c5 8. O-O h6 {E43: Nimzo-Indian: Rubinstein: 4...b6} (8... cxd4 9. exd4 d5 10. a3 Bxc3 11. Bxc3 dxc4 12. Bxc4 Ba6 13. b3 Bxc4 14. bxc4 Nbd7 15. Rc1 Rc8 16. Qa4 Qc7 17. Bb4 Rfd8 18. Rfd1 Qb7 19. Qb3 h6 20. h3 Nf8 {1-0 (42) Nakamura,H (2787)-Carlsen,M (2853) chess.com INT 2016}) 9. Qe2 $146 ({Predecessor:} 9. Rc1 d6 10. a3 Bxc3 11. Bxc3 Nbd7 12. Be2 Qe7 13. Nd2 e5 14. d5 Rfe8 15. e4 Nf8 16. Bf3 {1-0 (84) Aryan,A (1987)-Tran,T (2544) Bhopal 2017}) 9... cxd4 10. exd4 Bxf3 (10... Nc6 $11 {keeps the balance.}) 11. Qxf3 $16 ({Of course not} 11. gxf3 Nc6 $11) 11... Nc6 12. Qg3 Kh8 13. Qh3 {[#] And now Bxh6! would win.} Re8 14. Be3 Bxc3 15. bxc3 Nh7 16. Rad1 Rc8 17. Rfe1 Qf6 18. Qh5 e5 {[%cal Re5d4]} 19. h4 (19. c5 {looks sharper.} exd4 20. cxd4 Nf8 21. Ba6 Rb8 22. Bf1) 19... e4 20. Bf1 Ne7 21. g3 (21. a4 {with more complications.} Nf5 22. a5 Nxh4 23. Qg4 Kg8 24. axb6 axb6 25. Rb1) 21... Qg6 22. Qxg6 Nxg6 23. Bh3 ({White should try} 23. a4 $16) 23... Nf6 24. h5 (24. c5 $11) 24... Nf8 25. c5 Nd5 26. c4 $36 {[%mdl 2048] White is pushing.} Nxe3 27. Rxe3 bxc5 28. d5 Rcd8 29. Rb1 Nh7 30. Rb7 Nf6 31. Ra3 Nxh5 $2 {[#]} (31... Re5 $11) 32. Rxd7 $18 ({But not} 32. Bxd7 $6 Re7 $16) 32... Rxd7 33. Bxd7 $11 {[%mdl 4096] Endgame KRB-KRN} Re7 34. Rxa7 e3 35. fxe3 Rxe3 $2 (35... Nf6 {is a better defense.}) 36. d6 $18 g6 $2 (36... Nf6 37. Bf5 g6) 37. Bc6 Nf6 38. Rxf7 Re6 39. d7 Nxd7 40. Bxd7 {KRB-KR} Re3 41. Kg2 Ra3 42. Rf2 h5 43. Be8 Kg7 44. Rf7+ Kh6 45. Rf6 Rxa2+ 46. Kh3 Re2 47. Bxg6 Kg5 48. Rc6 {Accuracy: White = 64%, Black = 28%.} (48. Bd3 $142 Rh2+ 49. Kxh2 Kxf6 50. Kh3 Ke5 51. Be2 Kd4 52. Kh4 Ke3 53. Bxh5) 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.4"]
[White "Zapata Charles, Santiago"]
[Black "Molina, Pablo Sebastian"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2303"]
[BlackElo "2277"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,90,63,51,47,41,50,0,0,0,0,4,30,27,17,5,87,88,126,151,155,147,135,119,126,43,33,38,55,37,81,70,88,91,97,89,160,132,166,138,137,145,147,101,112,130,125,85,141,138,199,216,306,292,411,417,416,391,502,476,589,585,586,585,597,501,622,634,584,603,639,602,776,750,29978,29979,29987,29988,29990,29989,29999]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 h6 7. Nd5 Nxd5 {B33: Sicilian: Pelikan and Sveshnikov Variations} 8. exd5 {d6 is the strong threat.} a6 9. dxc6 {Threatens to win with c7.} axb5 {The position is equal.} 10. cxd7+ Bxd7 11. Bd3 Qb6 $146 ({Predecessor:} 11... Bc6 12. Qe2 Qd5 13. f3 Bc5 14. Be3 Bxe3 15. Qxe3 {½-½ (37) Zherebukh,Y (2553)-Matjushin,G (2500) Alushta 2009}) 12. O-O Bd6 13. Be3 Qc6 {[#]} (13... Qc7 $11 {remains equal.}) 14. Bxb5 $1 $16 {[%mdl 512]} Qc7 (14... Qxb5 15. Qxd6) 15. Bxd7+ Qxd7 16. c4 Qe6 17. c5 Bc7 18. Qb3 ({Better is} 18. b4 $16) 18... Qxb3 $14 19. axb3 Kd7 20. Ra4 g5 21. g4 Kc6 22. Kg2 Rad8 23. Rfa1 Kb5 ({Black should try} 23... h5) 24. Ra7 Rb8 25. Rc1 Kc6 26. b4 Ra8 27. b5+ {[%mdl 64] Decoy} Kxb5 28. Rxb7+ Kc6 {[#]} 29. Rb4 $1 Rhb8 {[#]} (29... f6 $142) 30. Rxb8 $1 $16 Rxb8 {[%mdl 4096] Endgame KRB-KRB} (30... Bxb8 $16 {is a better defense.} 31. b4 Ra4) 31. Ra1 $18 Rxb2 (31... Bd8 $142 32. Ra6+ Kd7 33. Rxh6 Rb4 34. Rd6+ Kc8) 32. Ra6+ Kd5 (32... Kd7 {was called for.} 33. Rf6 (33. Rxh6 Bd8 $16) 33... Ke8 34. Rxh6 Rb4) 33. Rxh6 Rb8 34. Rh7 Rg8 {Black hopes to continue with ...Ke6.} 35. Rxf7 Bd8 36. Rd7+ Kc6 37. Rd6+ Kb5 38. Rh6 Ba5 39. Kf3 Bb4 40. Re6 Bc3 41. Ke4 Rh8 42. Kd5 Rxh2 43. Rb6+ {White mates.} Ka5 44. Kc4 Be1 45. Rb1 {[%cal Rb1a1]} Rh6 46. Ra1# {Accuracy: White = 69%, Black = 33%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.5"]
[White "SICA, Mauro"]
[Black "Obregon, Andres Carlos"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2248"]
[BlackElo "2514"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,90,3,-5,10,-1,-8,-26,-27,-34,-20,-33,-18,-31,-9,-23,-22,-44,-25,-43,-35,-43,-44,-46,-38,-31,0,0,0,0,0,0,0,-13,-12,-15,-18,-90,-57,-124,-118,-146,-129,-128,-126,-285,-268,-322,-312,-508,-391,-528,-522,-591,-590,-573,-581,-809,-865,-854,-826,-845,-839,-1272,-1178,-1239,-1000,-2055,-2062,-29985,-29985,-29986,-29986]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nge2 d5 6. a3 Be7 7. cxd5 exd5 8. Nf4 c6 9. Bd3 Na6 {E46: Nimzo-Indian: Rubinstein: 4 e3 0-0 5 Ne2 without early Bd3} 10. O-O Nc7 11. Bc2 {LiveBook: 10 Games} (11. f3 Re8 12. Bd2 Bf8 13. Qe1 g6 14. g4 c5 15. Qf2 b6 16. h4 Bd6 17. Nce2 {0-1 (54) Caruana,F (2816)-Karjakin,S (2782) Leuven 2018}) 11... b6 {The position is equal.} 12. f3 c5 13. Bb3 $146 ({Predecessor:} 13. Rf2 Bd6 14. Nce2 Re8 15. Bd2 Bb7 16. b4 c4 17. g4 {0-1 (55) Ubiennykh,E (2346)-Kosteniuk,A (2537) Novosibirsk 2016}) 13... Bb7 14. Bd2 Bd6 15. Nfe2 Qe7 16. Qe1 Rad8 17. Qf2 Ne6 18. Rfe1 Qc7 19. f4 a6 20. h3 b5 21. Rac1 Qb8 22. Bc2 b4 23. Na4 bxa3 24. bxa3 cxd4 25. exd4 Bxa3 26. Rb1 Qc7 $36 {[%mdl 2048] White is under pressure.} 27. Bd3 h6 ({Worse is} 27... Ne4 28. Bxe4 dxe4 29. f5 $18) 28. h4 (28. Rb3 $11 {remains equal.} Bd6 29. Rb6) 28... Rfe8 29. Rb3 (29. f5 $15 Nf8 30. Bf4) 29... Bd6 $17 30. Rc1 Qe7 31. g3 Rc8 {[#] And now ...Rxc1+ would win.} 32. Rcb1 $2 (32. Qf1 $17) 32... Bc6 $19 33. Nb6 Rb8 34. Bxa6 $2 (34. f5 {was worth a try.} Nc7 35. Nc3) 34... Ne4 35. Qe3 {[#]} N6c5 $1 {[%mdl 512]} 36. dxc5 Bxc5 37. Nd4 Qa7 38. Nxc6 Bxe3+ 39. Bxe3 Qxa6 40. Nxb8 Rxb8 41. Kg2 Qe2+ 42. Kh3 h5 {...Qg4+ is the strong threat.} 43. Bd4 Nd2 44. R1b2 Qf1+ 45. Kh2 Nxb3 {Precision: White = 18%, Black = 62%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.6"]
[White "Hungaski, Robert"]
[Black "GIAMPA, Alejandro"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2505"]
[BlackElo "2251"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,63,47,26,41,41,41,35,40,39,117,117,117,116,117,103,131,146,134,144,136,122,113,112,115,87,85,86,137,136,136,132,145,129,162,94,103,96,150,141,186,182]} 1. e4 {Tsesarsky,I} c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 g6 5. c4 Bg7 6. Be3 Nf6 7. Nc3 Ng4 8. Qxg4 Nxd4 9. Qd1 e5 10. Bd3 d6 11. O-O O-O 12. a4 Be6 {B39: Sicilian: Maroczy Bind with 5...Bg7 and 7...Ng4} 13. a5 {LiveBook: 3 Games} Rc8 (13... Qd7 14. Qa4 Qxa4 15. Rxa4 Rfc8 16. Nd5 Bxd5 17. exd5 Re8 18. Re1 f5 19. Kf1 Kf7 20. b4 {1-0 (67) Saric,I (2657)-Navara,D (2737) Batumi 2018 CBM 184 [Szabo,Kr]}) 14. Nd5 Bxd5 {White is slightly better.} 15. cxd5 a6 16. Qa4 {[#]} f5 $146 (16... Qe7 $14) ({Predecessor:} 16... Rc5 17. Rfc1 Qe7 18. Rxc5 dxc5 19. Rc1 Rd8 20. Qc4 {1-0 (32) Shabalov,A (2615)-Baburin,A (2600) Mermaid Beach 1998 CBM 062 Extra [Tsesarsky,I]}) 17. Bxd4 $1 $16 exd4 18. exf5 gxf5 {[#]} 19. f4 $1 Kh8 20. Rfe1 Rc5 21. Re6 Qc7 22. Kf2 Rc1 23. Re1 Rxa1 24. Qxa1 Qc5 25. Qa2 b6 (25... Bf6 $142) 26. axb6 Qxb6 27. Re2 a5 28. Qa3 Rb8 {[#]} 29. g3 (29. Qa4 $1 $18 {Hoping for Re8+.} Rf8 30. Qd7) 29... Bf8 30. h4 Qc7 (30... h5 $142 31. Kg2 Qb3) 31. Qa4 Qf7 32. Qxa5 {Precision: White = 90%, Black = 42%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.7"]
[White "Chiarot, Cesar"]
[Black "Tristan, Leonardo"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2233"]
[BlackElo "2504"]
[Annotator "TA"]
[PlyCount "179"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,179,1,-29,-30,-66,-66,-66,-66,-66,-58,-59,-72,-75,0,0,0,-12,131,131,128,132,111,66,130,84,98,106,168,0,295,279,600,633,577,616,920,913,668,268,322,0,320,327,300,60,58,44,79,40,104,108,321,214,228,181,469,464,470,460,445,454,456,451,399,316,310,0,392,375,343,289,257,262,242,173,173,172,165,93,119,33,35,8,343,343,343,343,343,343,343,343,343,343,343,329,329,206,312,312,305,305,329,329,329,329,329,329,322,322,279,128,128,36,128,128,478,441,1471,1119,6608,12658,29968,29968,29966,29947,29938,5131,29983,5089,4594,1885,5418,0,1075,863,29977,29977,29978,29980,29980,29980,29978,120,120,120,29980,29981,29981,29982,29982,29983,29983,29984,29983,29984,29985,29986,29986,29986,29986,29987,29987,29988,29989,29990]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5 6. Ne5 c6 7. Bc4 e6 8. O-O Nbd7 9. Re1 Nxe5 {B01: Scandinavian Defence} 10. dxe5 Ng4 $1 (10... Nd5 11. Bd2 Nxc3 12. Bxc3 Bb4 13. Bxb4 Qxb4 14. Bb3 Rd8 15. Qf3 O-O 16. Qe3 c5 17. a3 {0-1 (35) Ascic,P (2396)-Savic,M (2536) Zupanja 2008}) 11. Qe2 Bc5 {Black is slightly better.} 12. Nd1 O-O-O 13. c3 $1 {Strongly threatening b4.} Bb6 $146 ({Predecessor:} 13... Rxd1 14. Rxd1 Bxf2+ 15. Kf1 Qb6 16. Bf4 Be3 17. h3 Bxf4 18. hxg4 {0-1 (59) Fombonne,S-Schaefer,U DESC email 2003}) 14. Bf4 {[#]} Qc5 (14... Rxd1 $1 $17 {[%mdl 512]} 15. Rexd1 (15. Raxd1 Nxf2) 15... Nxf2) 15. b4 $11 Qe7 16. Ne3 Qh4 (16... h5 $11 {remains equal.}) 17. Bg3 $36 {[%mdl 2048] Black is under strong pressure.} Qg5 {With the idea ...Nxe3.} 18. Nxf5 Qxf5 19. Rad1 h5 (19... Nh6 $14) 20. h3 Nh6 21. a4 $1 {[%cal Ba2a4,Ba4a5,Ba5a6,Ba6b7][%mdl 32]} Qg5 (21... Rxd1 $16 {was worth a try.} 22. Rxd1 Rd8) 22. Qf3 $2 (22. a5 $18 Bc7 23. a6) 22... h4 $2 {[%mdl 8192]} (22... Qf5 $1 $11) 23. Bf4 $18 Qg6 $2 (23... Qf5 24. a5 Bc7) 24. a5 Bc7 25. a6 Qc2 26. axb7+ Kb8 27. Rc1 (27. Ra1 $142) 27... Qf5 28. Rcd1 $2 (28. Ra1 $18 Bb6 29. Ra6) 28... Rxd1 $4 {[%mdl 8192]} (28... Qc2 $11 {and Black has nothing to worry.} 29. Ra1 Rd5) 29. Rxd1 {And now Bd3 would win.} g5 30. Be3 $2 (30. Qxc6 $18 gxf4 31. Ba6) 30... Qxf3 $14 31. gxf3 Kxb7 32. Bxg5 Rg8 (32... Bxe5 $14 33. Be3 (33. Bxh4 Nf5 $11) 33... Kc7) 33. f4 $16 {Threatens to win with Kf1.} Nf5 $2 (33... f6 $16) 34. Kf1 Bxe5 35. Rd7+ Kb8 $2 (35... Bc7 36. Bd3 (36. Rxf7 Nd6 $16) 36... c5 37. Rxf7 (37. bxc5 Rf8 $16) 37... cxb4) 36. fxe5 $18 Rxg5 37. Rxf7 {[%mdl 4096] Endgame KRB-KRN} Ng7 38. Ba6 {Rb7+ would kill now.} Nh5 39. Rb7+ Ka8 40. Rh7 {White threatens Rh8+ and mate.} Kb8 41. Rb7+ Ka8 42. Rc7 {[%cal Rc7c8]} Rg8 43. Rxc6 Nf4 44. Rc4 Rf8 45. Rc8+ Rxc8 46. Bxc8 {KB-KN} Kb8 47. Bd7 (47. Ba6 $1 $18) 47... Kc7 $16 48. Ba4 (48. Bb5 $16) 48... Nxh3 $14 49. Bc2 {Hoping for Kg2.} Ng5 $2 {[%mdl 8192]} (49... Nf4 $11 {and Black stays safe.}) 50. Kg2 $18 h3+ 51. Kg3 h2 52. Kxh2 Nf3+ 53. Kg3 Nxe5 54. Kf4 Kd6 55. Ke4 Ng4 56. Kf3 Ne5+ (56... Nf6 $142 57. Ke3 Nd5+ 58. Kd4 e5+ 59. Kc4 Nf4) 57. Ke3 Ng4+ 58. Ke2 $1 Ke5 59. Bb3 Nf6 60. f3 Nh5 61. Kd3 Nf4+ 62. Kc4 Nd5 63. b5 (63. Ba2 $18 {is more deadly.}) 63... Kd6 $16 64. Kd4 (64. Ba2 $1 $16) 64... e5+ {[#]} (64... Nc7 $1 $14) 65. Kc4 $1 Ne3+ $2 {[%mdl 8192] [#]} (65... Nf4 $16 66. Bc2 Nd5) 66. Kb4 $1 $18 Nf1 (66... Nf5 $142 67. c4 Ng3 68. c5+ Kc7) 67. c4 Ne3 68. c5+ Kc7 69. Ka5 Nf5 70. Ka6 Nd4 71. Bd5 (71. Bc4 $142 Nc6 72. bxc6 Kxc6 73. Bd3 Kxc5 74. Kxa7 Kd5 75. Be4+ Ke6 76. Kb6) 71... Kb8 72. c6 (72. b6 $142 axb6 73. Kxb6 Kc8 74. c6 Nc2 75. Be6+ Kd8 76. c7+ Ke7 77. c8=Q) 72... Kc7 73. Be4 (73. Bf7 $142 Nf5 74. Kxa7) 73... Kd6 74. Bd5 (74. Bd3 $142 Nxc6 75. bxc6 Kxc6 76. Kxa7) 74... Kc7 75. Bc4 Nxf3 76. Kxa7 Nd4 77. b6+ {[%cal Bb5b6,Bb6b7][%mdl 32]} Kxc6 78. b7 Kc5 79. Be6 $2 (79. Bd3 {mates} Nc6+ 80. Ka8 Kd5 81. Bb5 Kd6 82. Bxc6 Kxc6 83. b8=Q Kd5 84. Qb4) 79... Nc6+ $16 80. Ka8 Kd6 $2 {[%mdl 8192]} (80... e4 $16 81. Bd7 e3 82. Bxc6 e2) 81. Bc4 {White mates.} Kc7 82. Bd3 Nb8 83. Bb5 e4 84. Ka7 e3 85. Ka8 e2 86. Bxe2 Nd7 87. Bg4 Nb8 88. Bf5 Nc6 89. Bd3 Kb6 90. Be4 {Accuracy: White = 54%, Black = 30%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.8"]
[White "Alonso, Salvador"]
[Black "GARCIA, Raimundo"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2497"]
[BlackElo "2238"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,76,18,16,32,52,22,34,21,22,10,26,10,24,0,64,0,4,15,77,81,83,59,77,56,66,21,95,49,87,56,111,116,111,111,133,122,117,108,108,110,106,110,275,246,297,280,316,315,308,308,383,391,387,381,433,417,415,391,876,881,836,831,760]} 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Nf6 5. Nxf6+ exf6 6. c3 Bd6 7. Bd3 O-O 8. Ne2 Re8 9. Qc2 {B15: Caro-Kann: 3 Nc3: 3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6} h5 10. Be3 (10. O-O {seems wilder.} Qc7 11. h3 Be6 12. Be3 Nd7 13. c4) 10... Nd7 (10... Qa5 11. O-O h4 12. Bf4 Qc7 13. Qd2 Nd7 14. Rfe1 Nf8 15. Bxd6 Qxd6 16. Qf4 Qxf4 17. Nxf4 {½-½ (121) Savchenko,B (2562)-Nakamura,H (2746) St Petersburg 2018}) 11. O-O-O {White is slightly better.} Nf8 12. Kb1 Be6 13. c4 Rc8 14. Nc3 a6 $146 ({Black should try} 14... Bb4 $11) 15. h3 (15. c5 $14 Bc7 16. Be4) 15... b5 $1 $11 16. c5 Bb8 {[#]} (16... b4 $1 $11) 17. Be4 $1 $16 b4 18. d5 cxd5 19. Bxd5 (19. Nxd5 {looks sharper.} Qa5 20. b3 Ba7 21. c6 f5 22. Bf3) 19... Qe7 20. Bxe6 fxe6 (20... Qxe6 $11 21. Nd5 Rcd8 22. Nxb4 a5) 21. Ne4 Red8 22. g4 h4 (22... Qe8 $14) 23. Rxd8 Qxd8 24. Rd1 $36 {[%mdl 2048] White is in control.} Qe8 25. Nd6 Bxd6 26. Rxd6 Qb5 27. Qd3 Qxd3+ 28. Rxd3 {[%mdl 4096] Endgame KRB-KRN} Rc6 $2 {[#]} (28... Kf7 $16 {keeps fighting.}) 29. Kc2 $18 Kf7 30. Kb3 Ke7 31. Kxb4 Nd7 32. f4 f5 33. gxf5 exf5 34. Bf2 Ke6 35. Re3+ Kf7 36. Bxh4 Nf6 $2 (36... a5+ 37. Kxa5 Rxc5+ 38. Kb4 Kg6) 37. Bxf6 Kxf6 38. h4 Rc8 {Accuracy: White = 84%, Black = 26%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.9"]
[White "Villanueva, Mario"]
[Black "Madina Yadarola, Martin"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2482"]
[BlackElo "2236"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,79,53,41,50,45,40,56,40,35,37,61,41,177,175,171,180,247,254,477,481,486,475,528,542,537,538,552,539,625,618,611,609,509,262,289,289,282,283,278,291,323,290,303,218,234,231,326,318,493,497,492,500,479,493,504,509,473,502,953,513,543,482,685,160,644,644]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6 5. Nc3 b5 6. Bd3 Bb7 7. O-O Qc7 8. Re1 Nf6 9. e5 {B43: Sicilian: Kan Variation: 5 Nc3} (9. Bg5 Nc6 10. Nxc6 Qxc6 11. Qf3 Be7 12. a3 Qc5 13. Be3 Qe5 14. Bf4 Qh5 15. Qe3 Bc5 16. Qd2 O-O {1-0 (60) Radjabov,T (2742)-Artemiev,V (2692) Tbilisi 2017}) 9... Nd5 $1 10. Ne4 {Black must now prevent Nf5.} Nc6 11. Nd6+ {White is slightly better.} Bxd6 12. exd6 Qb6 13. Nf5 O-O-O $146 (13... O-O $14 14. Be4 exf5 15. Bxd5 Rab8) ({Predecessor:} 13... g6 14. Ng3 Na5 15. a4 b4 16. Be4 Qxd6 {½-½ (24) Popovych,O-Feuerstein,A New York 1972}) 14. c4 $36 {[%mdl 2048] White is on the roll.} (14. Nxg7 Rhg8 $11) 14... bxc4 15. Bxc4 Ncb4 (15... Qc5 $142) 16. Ne7+ ({Stronger than} 16. Nxg7 Qc6 $11) 16... Nxe7 $2 (16... Kb8 {was called for.} 17. a3 Qc5) 17. dxe7 Rde8 18. Be3 Qa5 19. Bd2 Qb6 20. Qb3 a5 21. a3 Qc6 {[%csl Gb7][%cal Rc6g2] [#]} 22. Bf1 Qd5 23. Rec1+ Nc6 24. Qxd5 exd5 25. Bxa5 Rxe7 26. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} Kb8 27. Bb6 d6 28. b5 Ne5 29. a4 {[%cal Ba3a4,Ba4a5,Ba5a6][%mdl 32]} Nc4 30. Bd4 Na5 (30... Nd2 $142 31. Rd1 (31. Bxg7 Rg8 $18) 31... Nxf1 32. Kxf1 (32. Rxf1 Rc8 $18) 32... f6) 31. Rcb1 ({Don't take} 31. Bxg7 Rg8 $18) 31... f6 (31... Rc8 $142 32. Bxg7 h5) 32. Bc3 Nc4 33. a5 Bc8 34. a6 Bf5 35. Rd1 Rc8 36. Rxd5 h6 (36... Be4 $142 37. Rd4 d5) 37. Rdd1 d5 38. Bd4 Kc7 (38... Re6 $142 39. Rac1 h5) 39. Rdb1 $2 (39. Ba7 $18) 39... Rb8 $2 {[#]} (39... Bxb1 $16 40. Rxb1 Kb8) 40. b6+ $1 {[%mdl 512] Accuracy: White = 74%, Black = 33%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.26"]
[Round "6.10"]
[White "Converset, Juan Jose"]
[Black "Saldano Dayer, Horacio"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2227"]
[BlackElo "2422"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,96,45,52,0,-6,0,38,41,34,33,33,27,52,40,31,37,90,39,39,52,35,37,33,40,47,51,37,0,20,7,9,8,19,-16,1,-37,-47,-37,-37,-93,-91,-109,-48,-57,-48,-48,-47,-35,-41,-42,-41,-37,0,0,9,13,61,43,54,57,61,66,70,70,108,104,104,103,110,91,104,86,128,93,138,149,147,71,45,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 Be7 7. Re1 b5 8. d5 {C84: Closed Ruy Lopez: Unusual White 6th moves} ({White should try} 8. Rxe4 $14 bxa4 9. d5 (9. dxe5 Rb8 $14) (9. Nxe5 O-O $14)) (8. Rxe4 d5 9. Nxe5 Nxe5 10. Rxe5 bxa4 11. Qe2 c6 12. Nc3 Ra7 13. Nxa4 O-O 14. Bd2 Bd6 15. f4 Bxe5 16. fxe5 {½-½ (65) Saric,I (2695)-Ragger,M (2687) St Petersburg 2018}) 8... Nc5 $11 9. Bb3 Nxb3 10. axb3 {White is slightly better.} Nb8 11. Nxe5 O-O 12. Nc3 $146 ({Predecessor:} 12. c4 b4 13. Bf4 c5 14. d6 Bf6 15. Qd5 Nc6 16. Nxc6 dxc6 17. Qxc6 {1-0 (28) Milman,L (2439)-Davis,L (2153) Philadelphia 2005}) 12... Bb7 13. Ne4 d6 14. Nf3 $1 c6 (14... Nd7 $14) 15. Qd3 (15. Bf4 $16) 15... Nd7 16. dxc6 Bxc6 17. Nd4 ({Avoid the trap} 17. Nxd6 $2 Nc5 $19) 17... Ne5 18. Qg3 {[#] Bh6 is the strong threat.} Bd7 19. Bg5 f6 20. Bd2 Qb6 21. Be3 Qb7 22. Bh6 {[%csl Gh6][%cal Rg3g7] [#]} Rf7 23. Bd2 b4 24. f4 Nc6 25. Qd3 d5 26. Nxc6 (26. Ng3 $15) 26... Bxc6 $17 27. Ng3 Bc5+ (27... d4 $17) 28. Be3 $15 d4 29. Bxd4 Bxd4+ 30. Qxd4 Bxg2 31. Ne4 Bxe4 32. Rxe4 a5 33. Rxa5 Rc8 (33... Rxa5 $5 34. Re8+ $8 Rf8 35. Rxf8+ Kxf8 36. Qd8+ {[%mdl 64] Double Attack} Kf7 37. Qxa5 Kg6 $11) 34. Rc5 $36 {[%mdl 2048] White has the initiative.} Rb8 (34... g6 {feels hotter.} 35. Re2 Rxc5 36. Qxc5 Kg7 37. Kf2 Rc7) 35. Qd5 Qxd5 36. Rxd5 $14 {[%mdl 4096] Endgame KRR-KRR} Rc7 37. Rc4 Ra7 38. Kf2 Ra2 39. Rd7 {Black must now prevent Rcc7.} Rxb2 40. Rcc7 Kh8 41. h4 h5 42. Ke3 f5 43. Kd3 Rb1 44. Rxg7 {Strongly threatening Rh7+.} Rd1+ 45. Ke2 ({Better is} 45. Kc4) 45... Re8+ $16 46. Kxd1 Re1+ $1 {The position is equal.} 47. Kd2 Rd1+ $1 48. Ke2 {Threatening mate with Rh7+.} Rd2+ $1 {Accuracy: White = 57%, Black = 45%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.1"]
[White "Romero Barreto, Jaime Jose"]
[Black "Slipak, Sergio"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2337"]
[BlackElo "2427"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,67,0,11,32,19,19,30,19,20,0,0,0,0,-12,-7,-7,58,60,128,86,281,256,255,67,153,8,8,8,8,8,8,21,307,297,264,189,158,165,1375,1385,1354,1367,1269,1280,1196,1196,1179,1164]} 1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 e6 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 Nf6 11. Bd2 c5 12. Ne4 {B19: Classical Caro-Kann: 4...Bf5 main line} cxd4 (12... Nc6 13. Bc3 Nb4 14. Bxb4 cxb4 15. Nxf6+ gxf6 16. c4 Qc7 17. O-O Rg8 18. c5 O-O-O 19. a3 Qc6 {½-½ (51) Inarkiev,E (2680)-Artemiev,V (2701) Sharjah 2018}) 13. Nxf6+ Qxf6 14. Qb5+ {White has an edge.} Nd7 15. Qxb7 Rb8 16. Qxa7 Bc5 17. Qc7 Rxb2 18. O-O {Threatens to win with Rab1.} Qd8 $146 (18... Rxc2 $11 19. Rac1 d3 20. Rxc2 dxc2) ({Predecessor:} 18... Ke7 19. Bf4 Rc8 20. Qxc8 Qxf4 {1-0 (35) Bojanic,B (2245)-Ratkovic,M (2176) Novi Sad 2012}) 19. Qg3 $1 $14 Qf6 ({Black should try} 19... Nf6 $14) 20. Rab1 $1 $16 {[%cal Rb1b2]} Rb6 $2 ({Don't play} 20... Rxc2 $6 21. Rb7 $11) (20... Rxb1 $16 21. Rxb1 O-O) 21. Rxb6 $18 Bxb6 {[#]} 22. Rb1 $2 (22. Bb4 $1 $18) 22... e5 {[#]} ({Better is} 22... O-O $1 $14) 23. Nxe5 $1 {[%mdl 512]} Nxe5 $11 {[#]} 24. Rxb6 $1 {[%mdl 576] Deflection} Qxb6 25. Qxg7 Qb1+ 26. Kh2 Nf3+ $2 {[%mdl 8192]} (26... Kd7 $1 $11 27. Qxh8 Qxc2) 27. gxf3 $18 {[%mdl 4096] Endgame KQR-KQB} Qb8+ 28. f4 Ke7 29. Qxd4 {Bb4+ is the strong threat.} Rd8 $2 (29... Rc8 30. Bb4+ Ke6 31. Qe4+ Kd7 32. Qf5+ Ke8) 30. Bb4+ {White is clearly winning.} Ke8 31. Qe4+ Kd7 {[#]} 32. Qd5+ $1 Ke8 33. Qc6+ {[%mdl 64] Double Attack} Rd7 34. Qe4+ {Accuracy: White = 63%, Black = 26%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.2"]
[White "Quiroga, Facundo"]
[Black "Perez, Maximiliano"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "2267"]
[BlackElo "2418"]
[Annotator "TA"]
[PlyCount "106"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,106,35,35,14,14,-7,-8,-8,-1,-7,0,2,25,23,23,22,25,21,50,27,48,12,91,24,25,0,0,-19,0,-10,0,0,3,-2,-20,-22,3,4,25,0,0,0,0,-9,0,-12,-6,-6,-6,-10,0,-25,-20,-34,-28,-74,-60,-93,-67,-113,-112,-121,-108,-141,-134,-135,-137,-147,-145,-243,-249,-350,-335,-347,-346,-307,-356,-325,-336,-457,-487,-514,-499,-509,-462,-475,-448,-925,-909]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 O-O 6. Nf3 Na6 7. O-O e5 8. Be3 c6 9. dxe5 dxe5 10. Qxd8 Rxd8 11. Rad1 {E94: King's Indian: Classical: 6 Be2 e5 7 0-0: Various Black 7th moves} Re8 12. Nd2 $146 ({Predecessor:} 12. h3 Bf8 13. Nd2 Nc5 14. f3 Nh5 15. Nb3 Ne6 16. c5 Ng3 17. Rf2 f5 18. Bc4 f4 19. Bc1 b5 20. Nxb5 cxb5 21. Bxb5 {½-½ (54) Matsenko,S (2505)-Shimanov,A (2606) Kaliningrad 2015}) 12... Ng4 13. Bg5 {The position is equal.} h6 14. Bh4 Nf6 15. Nb3 Be6 16. Rd2 b6 17. Rfd1 Rac8 18. f3 Nh5 19. Bf2 Bf8 20. Be3 Be7 {[#]} (20... Nf4 $11 {remains equal.}) 21. g3 ({White should play} 21. Nd5 $1 $16) 21... Bg5 22. Bxg5 hxg5 23. Kf2 Kf8 24. Na1 Kg7 25. Nc2 Rh8 26. b4 Nf6 27. Kg1 Nb8 28. Ne3 Kf8 29. Rd8+ Ke7 30. Rxh8 Rxh8 31. Rd2 Rc8 32. a3 Ne8 33. Kf2 Nd6 34. g4 Ne8 35. Ke1 Nc7 36. b5 Ne8 37. bxc6 Nxc6 38. Ncd5+ Kf8 39. c5 bxc5 40. Nc4 Rb8 41. Rb2 Rxb2 42. Nxb2 Nd6 43. Na4 c4 44. Nb4 (44. Nac3 $17) 44... Nd4 $19 45. Nc3 (45. Nc5 {was forced.}) 45... a5 46. Nbd5 Bxd5 47. Nxd5 {[%mdl 4096] Endgame [#] KBN-KNN} Nc2+ $1 48. Kd2 Nxa3 49. Nc3 Ke7 {Black is clearly winning.} 50. Kc1 Nab5 51. Nd5+ Ke6 52. Nb6 Nd4 53. Kd2 {[#]} (53. Bd1 $142 c3 54. h3) 53... c3+ $1 {Accuracy: White = 28%, Black = 64%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.3"]
[White "Garcia Palermo, Carlos"]
[Black "Zapata Charles, Santiago"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2407"]
[BlackElo "2303"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,47,7,16,-27,-30,-24,-18,-23,-7,-36,-10,-9,-6,-35,-8,-8,0,0,0,-23,-15,-23,-19,-20,0,0,0,0,0,-6,0,-6]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bg5 Ne4 6. Bf4 Nxc3 7. bxc3 c5 8. cxd5 Qxd5 9. e3 O-O 10. Qb3 {D80: Grünfeld: Unusual White 4th moves and 4 Bg5} (10. Be2 cxd4 11. cxd4 Qa5+ 12. Qd2 Nc6 13. Qxa5 Nxa5 14. Kd2 Be6 15. Rhc1 Rfc8 16. Bd3 Rxc1 17. Kxc1 Rc8+ 18. Kd2 Bd5 19. e4 Bc4 20. Rc1 b5 {½-½ (48) So,W (2780)-Wei,Y (2729) chess.com INT 2018}) 10... Be6 11. Qa3 $146 ({Predecessor:} 11. Qxd5 Bxd5 12. Be2 Nc6 13. O-O Rfc8 14. Rfd1 cxd4 15. cxd4 Nb4 16. Rd2 a5 17. Ne1 Bc4 18. Bxc4 Rxc4 {½-½ (50) Ju,W (2572)-Puranik,A (2520) chess.com INT 2018}) 11... cxd4 12. cxd4 Nc6 {[%cal Bb8c6,Bc6a5,Ba5c4][%mdl 32]} 13. Be2 Qa5+ (13... a5 {feels hotter.} 14. Qb2 Rfc8 15. O-O Nb4 16. Ne1 Qc6) 14. Qxa5 Nxa5 15. Bc7 b6 16. Ba6 Bc4 17. Bxc4 Nxc4 18. Rc1 b5 19. Ke2 Rfc8 20. Bg3 {The position is equal.} e6 21. Nd2 Nxd2 22. Kxd2 Bf8 23. Rxc8 Rxc8 24. Rc1 {Accuracy: White = 32%, Black = 69%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.4"]
[White "Obregon, Andres Carlos"]
[Black "Chiarot, Cesar"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2514"]
[BlackElo "2233"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,85,34,29,26,27,0,3,7,0,-12,21,14,75,9,18,13,16,20,15,20,22,21,15,3,27,31,65,65,64,64,64,60,62,64,66,68,148,155,141,138,164,167,160,83,86,71,199,205,210,212,262,253,311,206,390,369,427,395,885,883,867,883,853,862,831,810,889,884,1350,1353,1345,1287,2035,1823,29984,29985]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 5. e3 b5 6. b3 Bg4 7. Bd2 {D15: Slav Defence: 4 Nc3 a6 and gambit lines after 4 Nc3 dxc4} (7. cxd5 cxd5 8. Bd3 e6 9. a4 b4 10. Ne2 Bxf3 11. gxf3 Be7 12. Bd2 O-O 13. Rc1 Qd7 14. Qc2 Bd6 {1-0 (28) Aronian,L (2805)-Laznicka,V (2647) Riadh 2017}) 7... e6 8. Bd3 (8. h3 $5 {[%cal Rh3g4]} Bxf3 9. gxf3 $11 (9. Qxf3 Bb4 $11)) 8... Nbd7 9. h3 $146 {The position is equal.} ({Predecessor:} 9. O-O Be7 10. h3 Bh5 11. cxb5 cxb5 12. a4 b4 13. Ne2 Ne4 14. Be1 f5 {0-1 (33) Kozul,Z (2612)-Lekic,D (2381) Bihac 1999}) 9... Bh5 10. Qc2 Bg6 11. O-O Bd6 (11... Bxd3 $11 12. Qxd3 Be7) 12. a4 ({But not} 12. cxb5 $6 cxb5 13. Bxg6 hxg6 $11) (12. Bxg6 $16 {And now Bd3 would win.} hxg6 13. e4 dxe4 14. Nxe4 Nxe4 15. Qxe4) 12... Bxd3 13. Qxd3 {[%cal Ra4b5]} b4 14. Ne2 a5 15. Rac1 O-O 16. cxd5 cxd5 17. Rc6 $36 {[%mdl 2048] White is more active.} Ne4 18. Rfc1 f5 19. Be1 g5 20. Nd2 {Threatens to win with f3.} Ndf6 21. f3 Nxd2 22. Qxd2 Nh5 23. Qd3 g4 (23... Ng7 $14) 24. hxg4 fxg4 25. fxg4 Ng7 {[#]} 26. g3 $1 Qe7 27. e4 ({Better is} 27. Nf4) 27... dxe4 $16 28. Qxe4 Rae8 (28... Ne8 $16) 29. Bd2 $18 Bb8 30. Kg2 Qf7 31. Be3 Qd7 {next ...Qd5 is good for Black.} 32. Nf4 Rf6 $2 (32... Bxf4 {is a better defense.} 33. Bxf4 (33. gxf4 Qd5 $18) 33... Rf7) 33. R6c5 e5 34. Nd5 Rg6 $2 {[#]} (34... Rfe6 35. Rh1 h5 36. gxh5 exd4 37. Qxd4 Qd6) 35. Qxg6 $1 {[%mdl 512] Nf6+ would kill now.} Qxd5+ (35... hxg6 36. Nf6+) 36. Rxd5 {White threatens Qf6 and mate.} hxg6 37. Rxa5 exd4 38. Bxd4 Ne6 39. Bf6 Nf8 40. Rb5 Nd7 41. g5 {[%cal Bg4g5,Bg5f6][%mdl 32]} Nxf6 42. gxf6 {Threatening mate with Rb7.} Kf7 43. Rc6 {Precision: White = 71%, Black = 41%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.5"]
[White "Della Morte, German"]
[Black "Hungaski, Robert"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2366"]
[BlackElo "2505"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,63,10,0,10,14,0,19,31,122,133,155,143,146,108,83,87,256,244,260,251,386,383,361,353,481,480,466,454,420,366,362,365,328,172,174,164,29991,29992,29992,29993,29993,29994,29998,29999]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 a6 8. Nf3 c5 9. Qd2 Nc6 10. dxc5 Qxc5 11. O-O-O b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 12. Kb1 {C14: French: Classical System: 4 Bg5 Be7 main line} b4 (12... Nb6 13. Bd3 Rb8 14. g4 Nc4 15. Bxc4 bxc4 16. Ne2 h5 17. gxh5 Rh7 18. h6 Rxh6 19. h4 Rh5 {1-0 (31) Debashis,D (2522)-Rathnakaran,K (2385) New Delhi 2018}) 13. Ne2 {[%cal Bc3e2,Be2f4,Bf4h5][%mdl 32]} Qb6 $146 ({Predecessor:} 13... O-O 14. h4 a5 15. Ned4 Nxd4 16. Nxd4 a4 17. h5 a3 18. b3 Ba6 19. Bxa6 Rxa6 20. Rh3 {0-1 (45) Randolph,D (1992)-Boreika,V (2242) ICCF email 2012}) 14. f5 {The position is equal.} Ndxe5 (14... exf5 $14 15. Nf4 (15. Qxd5 O-O $16) 15... O-O) 15. Qg5 $1 $16 {[%cal Rg5g7]} O-O 16. f6 {[%csl Gf6][%cal Rg5g7]} Ng6 17. fxg7 Kxg7 18. Nf4 f6 $2 (18... Kg8 $16) 19. Nh5+ $18 Kh8 {[#]} 20. Qh6 $1 {[%csl Gh5][%cal Rh6g7]} Ra7 {[#]} (20... Rf7 {was necessary.}) 21. Bd3 $1 f5 {[#]} 22. g4 $1 {[%mdl 512]} Qd8 ({And not} 22... fxg4 23. Nh4 $18) 23. gxf5 exf5 24. Rhg1 {Strongly threatening Rxg6.} Rg8 25. Rg5 Rf7 26. Rdg1 {[%cal Rg5g6] Threatens to win with Rxg6.} Qd6 27. h4 (27. R5g2 $142) 27... Nce5 28. Nf4 $40 {[%mdl 192] Threatening mate with Nxe5. Pin. White has strong attack.} ({But not} 28. Nxe5 Qxe5 29. b3 Ne7 $16) 28... Rfg7 $2 (28... Ng4 $18 29. Nxg6+ (29. R1xg4 fxg4 30. Nxg6+ Rxg6 $14) 29... Rxg6 30. Rxg6 (30. R1xg4 fxg4 31. Bxg6 Rg7 $14 {[%mdl 64] Pin}) 30... Qxg6) 29. Nxe5 {[%mdl 64] Overworked Piece. White mates.} Qxe5 30. Nxg6+ {[%mdl 64] Overworked Piece} Rxg6 31. Rxg6 Rxg6 32. Qf8+ {[%mdl 64] Double Attack. Accuracy: White = 77%, Black = 23%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.6"]
[White "Miranda, Rafael"]
[Black "Alonso, Salvador"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2295"]
[BlackElo "2497"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,76,18,31,13,15,20,39,33,38,0,4,0,0,0,18,21,71,-18,0,-77,-36,-33,-27,-30,-30,-54,-52,-54,-55,-55,-70,-100,-60,-118,-104,-110,-88,-120,-104,-102,-100,-104,-84,-117,-115,-115,-114,-123,-108,-136,-115,-279,-290,-482,-454,-549,-507,-509,-229,-641,-297,-272,-139,-539,-522]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qd2 Nf6 8. f4 {B48: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 without Be2} (8. O-O-O Be7 9. f4 b5 10. e5 b4 11. exf6 bxc3 12. Qxc3 Bxf6 13. g4 h6 14. h4 Bb7 15. Rh2 Qd6 16. Qd2 Bxd4 17. Bxd4 Qxd4 18. Qxd4 Nxd4 19. Rxd4 {½-½ (31) Duda,J (2738)-Shankland,S (2725) Wijk aan Zee 2019}) 8... Bb4 {Strongly threatening ...Nxe4!} 9. Bd3 O-O 10. a3 {White is slightly better.} Be7 11. e5 Ng4 12. Ne4 $146 ({Predecessor:} 12. Bg1 f5 13. O-O-O b5 14. h3 Nh6 15. g4 Bb7 {0-1 (43) Leon Hoyos,M (2517)-Perunovic,M (2602) Tromsoe 2014}) 12... Nxe3 13. Qxe3 Nxd4 14. Qxd4 b5 15. Qe3 (15. Nf6+ $1 $16 Bxf6 16. exf6) 15... Bb7 (15... f5 {looks sharper.} 16. exf6 gxf6 17. O-O-O d5 18. Nd2 e5) 16. O-O (16. Nf6+ $11 Bxf6 17. exf6) 16... Bxe4 17. Qxe4 {[%csl Gd3][%cal Re4h7]} g6 18. Kh1 d6 19. Rae1 dxe5 20. fxe5 Rad8 21. Rf3 Rd5 22. Qf4 Qd8 23. Re4 (23. Ref1 $15) 23... Bg5 $17 24. Qg3 Bh6 25. h4 Rd4 26. Qg4 Rxe4 $1 27. Qxe4 Bg7 28. Re3 Qc7 29. b4 Rd8 30. c4 bxc4 31. Bxc4 a5 32. b5 $2 {[#]} (32. Kh2 $17) 32... Qc5 $1 $19 33. Be2 $2 {[#]} (33. Rd3 Rxd3 34. Qa8+ Bf8 35. Bxd3) 33... Rd4 $1 {[%cal Rd4e4]} 34. Qa8+ Bf8 {Threatens to win with ...Qc1+.} 35. Re4 h5 (35... Rd2 $142 {Hoping for ...Qf2.} 36. Kh2 Qf2) 36. g3 $2 (36. Rxd4 Qxd4 37. g3) 36... Rxe4 (36... Rd2 $142 37. Kg2 Qxb5) 37. Qxe4 Qf2 (37... Qxa3 $19 38. Kg2 a4) 38. a4 $2 {[%mdl 8192]} (38. Qf3 $17 {nothing else works.} Qxf3+ 39. Bxf3) 38... Qxg3 {Accuracy: White = 23%, Black = 57%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.7"]
[White "Coro, Lucas"]
[Black "Villanueva, Mario"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2276"]
[BlackElo "2482"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,68,18,20,0,0,0,0,0,0,4,0,0,0,0,12,14,50,0,1,0,21,19,32,-10,-1,-19,-12,-47,-45,-41,-49,-37,-41,-72,-54,-45,-42,-55,-48,-63,-61,-92,-86,-152,-135,-143,-158,-175,-168,-173,-170,-165,-142,-564,-579,-572,-575,-552,-556,-552,-538]} 1. e4 e6 2. d4 d5 3. Nd2 Be7 4. c3 c5 5. dxc5 Nf6 6. Bd3 {C03: French Tarrasch: Unusual Black 3rd moves} (6. exd5 Nxd5 7. Ne4 O-O 8. Nf3 Qc7 9. Bc4 Rd8 10. Qe2 Nd7 11. O-O Nxc5 12. Nxc5 Qxc5 13. Rd1 {½-½ (51) Pavasovic,D (2548)-Bauer,C (2647) Heraklio 2017}) 6... dxe4 7. Nxe4 Nxe4 8. Bxe4 {The position is equal.} Qxd1+ 9. Kxd1 Bxc5 10. Ke2 Nd7 {[%cal Bb8d7,Bd7b6,Bb6d5,Bd5b4][%mdl 32]} 11. Nf3 Ke7 12. Bf4 $146 ({Predecessor:} 12. Rd1 Nf6 13. Bc2 Bd6 14. Bg5 Bd7 15. Nd4 h6 16. Bh4 Rac8 17. Bg3 Bxg3 18. hxg3 {½-½ (40) Zozulia,A (2334)-Mkrtchian,L (2447) Warsaw 2013}) 12... Nb6 13. Bd3 Nd5 14. Bd2 Bd7 15. c4 Nb4 16. Bb1 a5 17. Bc3 f6 18. a3 Nc6 19. b3 e5 20. Be4 Be6 21. Nd2 Nd4+ 22. Bxd4 Bxd4 23. Rab1 Ra7 24. Rhd1 b6 25. Bd3 g6 26. Nf1 (26. a4 $142) 26... a4 $17 {Hoping for ...axb3.} 27. b4 f5 28. f3 Rc8 29. Rdc1 Rd7 30. Ne3 Kf7 31. g3 $2 {[%mdl 8192]} (31. c5 $17) 31... Bxe3 $19 {Black is clearly winning.} 32. Kxe3 {[#]} f4+ $1 {[%mdl 512]} 33. gxf4 exf4+ 34. Ke2 {[#]} Rcd8 $1 {Accuracy: White = 41%, Black = 72%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.8"]
[White "Rodriguez, Jorge Luis"]
[Black "Bustos, Cristian"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2385"]
[BlackElo "1999"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 33,73,28,30,20,22,0,0,0,0,0,-10,-35,0,-10,168,166,169,175,170,162,168,168,170,41,34,34,34,0,0,0,0,-70,-63,-81,-92,-114,-125,-677,-626,-29995,-29996,-29997]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Bg5 Be7 5. e3 O-O 6. Nc3 a6 7. cxd5 exd5 8. Qc2 Nbd7 9. Bd3 c6 10. O-O Re8 11. Rae1 Nf8 12. Ne5 Ng4 13. Bxe7 Rxe7 14. f4 f6 15. Nxg4 Bxg4 16. f5 Qd6 17. Qf2 Bh5 18. g4 $146 {D65: Queen's Gambit Declined: Classical: 7 Rc1 c6 8 Qc2 a6 9 cxd5} ({Predecessor:} 18. e4 Rae8 19. exd5 cxd5 20. Rxe7 Rxe7 21. Bc2 Bf7 22. Bb3 Nd7 23. Qf4 Qxf4 24. Rxf4 Nb6 25. Kf2 Kf8 {½-½ (39) Cvitan,O (2500)-Granda Zuniga,J (2555) New York 1987}) 18... Bf7 ({But not} 18... Bxg4 $6 19. Qh4 $16) 19. Ne2 Rae8 20. Nf4 {The position is equal.} c5 {aiming for ...cxd4.} 21. Ng2 Nd7 22. Bb1 Nb6 {[#]} 23. g5 $1 {[%mdl 512]} cxd4 $2 (23... fxg5 $11 {and Black stays safe.} 24. dxc5 Qxc5) 24. g6 $18 hxg6 25. fxg6 Be6 {With the idea ...dxe3.} 26. exd4 Kf8 27. b3 Bg8 28. Ne3 (28. Rd1 $18) 28... Qb4 $14 29. Qh4 Nd7 $1 30. Nc2 Qc3 31. Rxe7 Rxe7 32. Re1 ({White should play} 32. Ne1 $11) 32... Rxe1+ $15 33. Qxe1 {[#]} Qd3 $1 34. Qb4+ Ke8 35. Na3 $2 {[%mdl 8192]} (35. Qe1+ $17 Kd8 36. Qg3) 35... Qe3+ $19 36. Kf1 {If only White now had time for Qe1....} Be6 {[%cal Re6h3]} 37. Kg2 {Precision: White = 24%, Black = 73%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.9"]
[White "Cimer, Emanuel"]
[Black "Ricardi, Pablo"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2201"]
[BlackElo "2485"]
[Annotator "TA"]
[PlyCount "50"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,50,53,60,47,52,25,41,38,54,52,59,0,0,-4,-14,-10,-5,0,-10,-134,-136,-139,-155,-381,-343,-516,-506,-487,-521,-511,-478,-739,-728]} 1. e4 c5 2. Nf3 e6 3. c4 Nc6 4. d4 cxd4 5. Nxd4 Nf6 6. Nc3 d6 7. Be2 Be7 8. O-O O-O 9. Be3 Bd7 10. Qd2 a6 11. f3 {B54: Sicilian: 2...d6 3 d4 cxd4 4 Nxd4, Unusual Lines} Qb8 12. a4 Rd8 13. Rab1 $146 {White is slightly better.} ({Predecessor:} 13. a5) 13... Nb4 14. g4 h6 15. h4 ({Better is} 15. Rf2 $14) 15... d5 $11 {[#]} 16. e5 $1 {[%mdl 512]} dxc4 ({Don't blunder} 16... Qxe5 $2 17. Bf4 $18) 17. exf6 Qg3+ {[%mdl 64] Double Attack} 18. Kh1 {Threatens to win with Ne4.} Qxh4+ 19. Kg2 (19. Kg1 $11 {remains equal.} Qg3+ 20. Kh1 Qh3+ 21. Kg1 Qg3+ 22. Kh1 Qh3+ 23. Kg1 Qg3+) 19... Qxf6 $17 ({Not} 19... Bd6 $2 20. Rh1 $18) 20. Ne4 {[#]} ({Much weaker is} 20. Bxc4 e5 $15) 20... Qg6 $1 {Strongly threatening ...e5.} 21. Qc1 $2 (21. Ng3 $17 {keeps fighting.}) 21... e5 $19 22. Nc2 (22. Bd2 $142 Bxg4 {[%mdl 64] Deflection} 23. fxg4 Qxe4+ {[%mdl 64] Double Attack} 24. Bf3 Qxd4 25. Be3) 22... Nd3 {Black is clearly winning.} 23. Bxd3 cxd3 24. Ne1 {[#]} Bxg4 $1 {[%mdl 512]} 25. Ng3 (25. Kh2 $142 Rac8 26. Qd1) (25. fxg4 Qxe4+) 25... Rac8 {Accuracy: White = 44%, Black = 79%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.27"]
[Round "7.10"]
[White "Acosta, Pablo Ismael"]
[Black "Hernandez Amura, Gilberto"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2467"]
[BlackElo "2195"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,105,57,39,58,39,43,44,52,39,48,47,39,48,53,55,55,60,72,45,39,43,49,45,25,38,41,37,33,30,30,32,70,70,78,33,42,33,37,41,34,46,112,88,85,55,58,65,126,122,119,61,64,72,72,64,93,104,123,109,146,142,177,0,0,-20,0,0,0,0,-92,0,0,0,68,53,57,63,230,227,197,195,171,130,308,262,733,715,1090,1195,29984,29985,29986,29987,29987,29988]} 1. d4 Nf6 2. Nf3 c5 3. d5 e6 4. c4 exd5 5. cxd5 d6 6. Nc3 g6 7. Bf4 Nbd7 {A61: Modern Benoni: Nf3 without early e4} (7... Bg7 8. e3 O-O 9. h3 Qe7 10. Nd2 Nh5 11. Bh2 f5 12. Be2 f4 13. O-O fxe3 14. Nde4 exf2+ 15. Kh1 Bxc3 16. Nxc3 {0-1 (49) Xiong,J (2665)-Caruana,F (2804) Saint Louis 2018}) 8. h3 a6 9. a4 Qe7 {White is slightly better.} 10. e3 Bg7 11. Be2 O-O 12. O-O Ne8 13. Nd2 Ne5 14. a5 Bd7 {[#]} 15. Ra3 $146 ({Predecessor:} 15. Qb3 Nc7 16. Nde4 Rfd8 17. Rfe1 Be8 18. Bg5 {1-0 (27) Riazantsev,A (2682)-Cebalo,M (2500) Biel 2010}) 15... Rb8 16. Rb3 Nc7 17. Bh2 f5 18. Re1 Kh8 19. Bf1 Rfe8 20. Kh1 Nf7 21. Nc4 Nb5 22. Nb6 Nc7 23. Nca4 Bxa4 24. Nxa4 Be5 25. f4 Bg7 26. Nb6 Red8 ({Black should play} 26... Na8 $14) 27. Bd3 Qh4 28. e4 fxe4 29. Bxe4 Nb5 (29... Re8 $14) 30. Bg3 $16 Qf6 31. Bb1 (31. Rbe3 $1 $16) 31... Nd4 32. Rbe3 {Black must now prevent Re6!} Nh6 33. Bh2 Nhf5 34. Re4 Qh4 35. Qd3 $1 Qf2 36. Nc4 $1 h5 37. g4 $2 (37. Rg1 $18) 37... Nf3 {[%csl Gf3][%cal Rf2h2]} (37... hxg4 $5 38. Rf1 $8 Qh4 39. hxg4 Qxg4 $17) 38. Qc2 (38. Qe2 $5 {[%cal Re2f2]} Ng3+ 39. Bxg3 Qxg3 {[%mdl 64] Double Attack} 40. Qg2 Qxg2+ 41. Kxg2 Nxe1+ 42. Rxe1 $15) 38... Ng3+ (38... Qxh2+ 39. Qxh2 Nxh2 40. Kxh2 $16) 39. Bxg3 Qxg3 {[%mdl 64] Double Attack} 40. Qg2 $36 {[%mdl 2048] Black is under pressure.} Qxg2+ 41. Kxg2 Nxe1+ 42. Rxe1 hxg4 (42... Rf8 $11 43. Kg3 h4+ $1 {[%mdl 512]} 44. Kxh4 Rxf4 45. Nxd6 Bf6+ 46. Kg3 Rd4) 43. hxg4 $14 g5 44. fxg5 Be5 $2 (44... Re8 $14 45. Rh1+ Kg8) 45. Rh1+ $18 (45. Nxe5 dxe5 46. Rh1+ (46. Rxe5 b6 $11) 46... Kg8 $16) 45... Kg8 {[#]} 46. Bf5 $1 Re8 47. Rh6 Bxb2 $2 (47... Rbd8 $16 {was necessary.}) 48. Be6+ (48. Nxb2 Re2+ 49. Kg3 Rxb2 $14) ({Don't do} 48. Nxd6 Bc3 $16) (48. Rxd6 Bd4 $14) 48... Kg7 $2 (48... Rxe6 49. Rxe6 Be5) 49. Nxb2 b5 50. axb6 Rxb6 51. Nc4 {White mates.} Reb8 52. Nxb6 Rxb6 53. Bf5 {Accuracy: White = 64%, Black = 56%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.1"]
[White "Perez, Maximiliano"]
[Black "Obregon, Andres Carlos"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2418"]
[BlackElo "2514"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,98,12,23,-8,-13,0,12,22,29,0,0,5,55,28,34,31,20,32,17,27,62,52,82,70,49,61,116,117,116,114,124,117,112,53,41,53,37,-22,-20,-35,-19,-32,-43,-66,-26,-19,-30,-38,-7,-40,-55,-97,-80,-127,-115,-143,-148,-208,-209,-201,-152,-153,-122,-141,-135,-301,-281,-363,-330,-527,-520,-504,-485,-29981,-29982,-29988,-29989,-29989,-29990]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be7 8. Be3 O-O 9. O-O Nc6 10. Qd2 Be6 11. Rfd1 a5 12. f3 {B92: Sicilian Najdorf: 6 Be2} (12. a3 a4 13. Nc1 Qa5 14. Qd3 Rfc8 15. N1a2 Qd8 16. Qd2 Ng4 17. Bxg4 Bxg4 18. f3 Be6 19. Nb4 Na5 20. Ncd5 Nc4 21. Qc1 Bf8 22. Bf2 Be7 23. Be3 Bf8 24. Bf2 Be7 {½-½ (24) Kovchan,A (2554)-Kokarev,D (2625) Taganrog 2014}) 12... a4 13. Nc1 Ra5 $146 ({Predecessor:} 13... Qc8 14. a3 Rd8 15. Bb6 Rd7 16. Qe3 d5 17. exd5 Nxd5 18. Nxd5 Rxd5 19. Rxd5 Bxd5 {0-1 (54) Diele,R (2211)-Ljubicic,L (2440) ICCF email 2007}) 14. Bb5 {The position is equal.} a3 15. bxa3 Rxa3 16. Nb3 Na5 17. Nb1 Nxb3 18. cxb3 Ra8 19. Nc3 $36 {[%mdl 2048] White fights for an advantage.} Qa5 20. Bf1 Bd8 21. Kh1 Rc8 22. Nb5 d5 23. b4 (23. exd5 Nxd5 24. Nd6 Rc2 $11) 23... Qa4 (23... Qa8 $1 $14) 24. Bc5 $16 ({But not} 24. exd5 $6 Nxd5 25. Bc5 Be7 $11) 24... Rxc5 25. bxc5 {Hoping for Nc3.} Ba5 26. Qb2 dxe4 27. Nc3 ({Better is} 27. Qxe5 $16 exf3 28. gxf3) 27... Bxc3 $14 28. Qxc3 exf3 29. gxf3 ({White should play} 29. Qxe5 $14 Re8 30. gxf3) 29... Bd5 $11 30. Bg2 Re8 {[%mdl 1024] Black has compensation.} 31. Re1 Qf4 32. Re2 Bc6 (32... Nh5 {seems wilder.} 33. Rae1 f6 34. Rd2 Bc6 35. Qe3 Qf5) 33. Rae1 {[%cal Re2e5]} Nd7 34. Qe3 {aiming for Qxf4.} g5 35. Rg1 Kh8 36. Qc3 Nf8 37. Rge1 {[%cal Re2e5]} f6 38. Re4 Qf5 39. Rd1 (39. R4e2 $17 {is a better defense.}) 39... Ne6 $19 ({Don't take} 39... Bxe4 40. fxe4 Qg4 41. Qd3 $17) 40. Rd6 Bxe4 41. fxe4 Qf2 42. Qf3 Qe1+ ({Much weaker is} 42... Qxa2 $6 43. Qxf6+ Ng7 44. Rb6 $11) 43. Bf1 $2 {[#]} (43. Qf1 $17 {was the only chance.} Qxf1+ 44. Bxf1) 43... Nf4 $1 44. Rd1 {[#]} Qb4 $1 45. Rc1 (45. c6 $142 bxc6 46. a3) 45... Rd8 46. c6 bxc6 47. Rxc6 (47. Kg1 $19) 47... Qe1 {Black mates.} 48. Kg1 {[#]} g4 $1 {[%mdl 576] Deflection} 49. Qxg4 Qe3+ {Accuracy: White = 26%, Black = 61%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.2"]
[White "Alonso, Salvador"]
[Black "Romero Barreto, Jaime Jose"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2497"]
[BlackElo "2337"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,93,6,0,-5,19,26,27,31,34,41,43,39,21,51,52,49,37,-39,58,74,73,68,100,79,80,79,136,145,132,91,156,165,207,104,218,179,165,147,211,223,330,182,169,97,94,99,86,89,124,95,175,214,960,954,920,237,233,222,402,301,402,394,356,166,166,166,278,267,412,400,427,427,427,301,1292,1248,6215,6192,6070,5875,6079,6070,5806,5586,5040,4666]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb6 6. Qe2 {C45: Scotch Game} (6. Nc3 Nf6 7. Qe2 O-O 8. Bg5 Nd4 9. Qd2 Nxb3 10. axb3 h6 11. Be3 Bxe3 12. Qxe3 d5 13. O-O-O c6 14. exd5 cxd5 {1-0 (40) Amin,B (2686)-Safarli,E (2676) Hoogeveen 2018}) 6... d6 7. Be3 Nf6 8. Nc3 {White has an edge.} O-O 9. O-O-O Re8 10. f3 Be6 11. Kb1 Ne5 12. Bxb6 axb6 13. Nd4 $146 (13. a3 $14) ({Predecessor:} 13. Qf2 Qe7 14. h3 Nfd7 {1-0 (50) Alexakis,G (2061)-Papadopoulos,A (2255) Heraklion 2016}) 13... Bc4 (13... c6 $1 $15) 14. Qf2 Bxf1 15. Rhxf1 Nc6 16. g4 Nxd4 17. Qxd4 Re5 (17... Re6 $142) 18. f4 $16 Rea5 19. e5 Ne8 (19... Nxg4 $142 20. Rg1 Nh6) 20. a3 b5 21. exd6 (21. Rfe1 $18) 21... Nxd6 (21... Qxd6 $16 22. Qxd6 Nxd6) 22. g5 Qf8 23. Rfe1 Nc4 (23... Nf5 $16 24. Qd7 b4) 24. Nd5 $18 Qd6 (24... Ra4 {might work better.} 25. Ne7+ Kh8) 25. Ne7+ (25. Qe4 $142 Qc5 26. Nxc7 $1 {[%mdl 576] Back Rank}) 25... Kf8 26. Qxd6 ({Better is} 26. Qc3 $1 $18 Nxa3+ 27. bxa3 Qxa3 28. Qxa3 Rxa3 29. Nd5) 26... Nxd6 $16 27. Nd5 $1 {[%cal Rd5c7]} Ne8 28. Rd3 Ra4 29. c3 Rc4 (29... R4a6 $16) 30. Rh3 $1 $18 {[%cal Rh3h7]} Rd8 $2 (30... Kg8 31. Ree3 Kh8) 31. Rxh7 {[%cal Rh7h8]} Kg8 32. Rh3 $2 (32. Rh5 {White threatens Ne7+ and mate.} g6 33. Rxe8+ $1 {[%mdl 576] Decoy} Rxe8 34. Nf6+ {[%mdl 64] Double Attack} Kg7 35. Rh7+ Kf8 36. Rh8+ Ke7 37. Rxe8+ Kd6 38. Ne4+ Kd7 39. Re5) 32... f5 33. gxf6 Rxd5 $2 (33... Nxf6 34. Nxf6+ gxf6) 34. Rxe8+ {[%mdl 4096] Endgame KRR-KRR} Kf7 {[#]} 35. fxg7 $1 {[%mdl 512]} Kxg7 36. Re5 (36. Re7+ $142 Kg6 37. Rg3+ Kf6 38. Rgg7) 36... Rxe5 37. fxe5 {KR-KR} Re4 {[#]} (37... Kg6 $142 38. Kc2 Re4) 38. Rd3 $1 c6 (38... Kg6 $142 39. Rd7 Rc4) 39. Rd7+ Kg6 40. Rxb7 Rxe5 41. Rc7 Rc5 $2 (41... Re6 42. c4 bxc4) 42. Kc2 {White is clearly winning.} Kf6 43. b4 Rc4 44. Kb3 Ke5 45. a4 Rh4 46. Rxc6 bxa4+ 47. Kxa4 {Accuracy: White = 54%, Black = 27%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.3"]
[White "Villanueva, Mario"]
[Black "Della Morte, German"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2482"]
[BlackElo "2366"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,57,4,4,29,12,124,119,126,129,121,120,120,89,92,82,79,81,127,129,331,319,308,315,460,483,438,459,468,466,437,435,407,304,29982,29980,29983,29984,29984,29985,29985,786,786,762,720,704]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Bb4 5. e5 h6 6. Bd2 Bxc3 7. bxc3 Ne4 8. Bc1 O-O {C12: French: Classical System: McCutcheon Variation} (8... c5 9. Ne2 Nc6 10. f3 Ng5 11. Be3 c4 12. h4 Nh7 13. h5 Qa5 14. f4 Bd7 15. g4 O-O-O 16. Qc1 {½-½ (53) Warakomski,T (2511)-Sieciechowicz,M (2409) Poland 2017}) 9. Ne2 {Threatens to win with h4.} f5 {[#]} (9... c5 $11 {remains equal.}) 10. h4 $1 $16 (10. f3 $6 Qh4+ 11. g3 Nxg3 $11) 10... f4 {White is better.} 11. f3 ({Reject} 11. Bxf4 $6 Nxc3 12. Qd2 (12. Nxc3 Rxf4 13. g3 Rf8 $11) 12... Nxe2 $14) 11... Ng3 12. Nxg3 fxg3 13. f4 $146 ({Predecessor:} 13. Bd3 c5 14. f4 Nc6 15. Be3 Qa5 16. Qd2 {½-½ (38) Lukac,R (2064)-Vrana,F (2217) Slovakia 2016}) 13... c5 14. Rh3 Nc6 15. Qg4 cxd4 16. Rxg3 {[%csl Gg3][%cal Rg4g7]} Qc7 $2 (16... Rf7 $16 {was called for.}) 17. Bd3 $18 Qf7 {[#]} 18. Ba3 $1 Rd8 (18... Kh8 $142 19. Bxf8 Qxf8 20. cxd4 Bd7) 19. Bg6 Qd7 20. Qh5 dxc3 21. Bd3 {White threatens Qxh6 and mate.} Nd4 {If Black can now play ...Kh8 this consolidates a bit.} 22. Qxh6 {Threatening mate with Qh7+.} ({Not} 22. Qg6 Nf5 $18) 22... Nf5 23. Qh5 Qa4 $2 {[#]} (23... b5 $18 24. Rg6 a5) 24. Be7 $1 {[%mdl 512]} Qxf4 {[#]} (24... Nxe7 25. Qh7+) 25. Rxg7+ $1 {[%mdl 576] Remove Defender} Kxg7 (25... Nxg7 26. Qh7+) 26. Bf6+ Kf8 27. Qh8+ (27. Bxf5 $142 Qg3+ 28. Kf1 Rd7 29. Bg6 Qxg6 30. Qxg6 Rf7 31. Kg1 a5 32. Rf1) 27... Kf7 28. Qh7+ Kf8 29. Bxf5 $1 {Accuracy: White = 74%, Black = 25%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.4"]
[White "Bustos, Cristian"]
[Black "Garcia Palermo, Carlos"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "1999"]
[BlackElo "2407"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,70,0,0,0,0,-11,0,0,0,-18,-14,-16,-10,-20,19,20,18,-16,-13,-15,-14,-29,-25,-45,-21,-108,-116,-187,-195,-186,-203,-293,-297,-352,-362,-337,-339,-351,-360,-327,-309,-416,-424,-458,-458,-453,-437,-436,-417,-416,-416,-800,-754,-658,-590,-590,-530]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Bxc6 bxc6 8. Ne2 Re8 9. Ng3 {C49: Four Knights: 4 Bb5 Bb4} (9. a3 Bc5 10. Be3 Bxe3 11. fxe3 d5 12. Ng3 a5 13. Qe1 a4 14. h3 Rb8 15. Rb1 Rb5 16. Qc3 Qd6 {½-½ (30) Fernandez,D (2450)-Jones,G (2663) Reading 2017}) 9... d5 10. Qe2 a5 11. h3 {The position is equal.} a4 $146 ({Predecessor:} 11... h6 12. Rd1 a4 13. c3 Bf8 14. Qc2 Bd6 15. Be3 Nh7 16. Re1 Nf6 17. Rad1 {½-½ (17) Hobuss,U (2394)-Hort,V (2534) Davos 2002}) 12. Bg5 h6 13. Bd2 Bf8 14. Rfe1 g6 15. exd5 Nxd5 16. d4 Ba6 $1 $36 {[%cal Ra6e2][%mdl 2048] Black fights for an advantage.} 17. c4 Nb6 18. dxe5 Nxc4 19. Bc3 Nxe5 $1 20. Qe3 (20. Qc2 $11 {keeps the balance.} Nxf3+ 21. gxf3) 20... Nd3 $17 21. Qxe8 (21. Ne4 $17) 21... Qxe8 $19 22. Rxe8 Rxe8 23. Ne1 {[#]} (23. h4 $142) 23... Nxf2 $1 {[%mdl 512]} 24. Kxf2 Bc5+ 25. Kf3 {Hoping for Ne4.} Re3+ 26. Kf4 g5+ 27. Kg4 {next Nf3 is good for White.} Bc8+ 28. Kh5 Rxg3 29. Rd1 {[#] Strongly threatening Rd8+.} Bf5 {( -> ...Kh7)} 30. Rd8+ Bf8 31. Rxf8+ Kxf8 32. Kxh6 Be4 33. Nf3 (33. Bd4 $142 Bxg2 34. Bf2 Rxh3+ 35. Kxg5) 33... Bxf3 {Black is clearly winning.} 34. gxf3 Rxh3+ 35. Kxg5 Rxf3 {Accuracy: White = 28%, Black = 77%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.5"]
[White "Zapata Charles, Santiago"]
[Black "Saldano Dayer, Horacio"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2303"]
[BlackElo "2422"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,45,8,32,32,35,35,52,29,42,0,27,24,28,24,62,43,48,0,10,-26,-26,-133,-122,-110,-37,-66,0,0,0,0,29,0,0,0,0,0,0,0]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. h4 Qc7 5. Nc3 a6 6. h5 {B12: Caro-Kann: Advance Variation} h6 7. g4 Bd7 8. Na4 $146 {White is slightly better.} ({Predecessor:} 8. f4 e6 9. Nf3 c5 10. Be3 cxd4 11. Nxd4 Nc6 12. Qd2 {1-0 (48) Anton Guijarro,D (2627)-Dreev,A (2664) Almaty 2016}) 8... e6 9. Nf3 (9. f4 {is interesting.} b6 10. Nf3 c5 11. c3 Bb5 12. b3) 9... c5 10. Nxc5 Bxc5 11. dxc5 Nc6 12. Be3 O-O-O 13. Be2 f6 14. exf6 Nxf6 15. Nh4 {[#]} (15. g5 $11 {remains equal.} hxg5 16. Nxg5) 15... d4 $1 $17 {[%cal Rd4e3]} 16. Bd2 Ne4 (16... e5 $17) 17. Ng6 Rhf8 (17... Rhe8 $15) 18. Nxf8 $11 Rxf8 19. O-O Ng3 20. fxg3 Qxg3+ {The position is equal.} 21. Kh1 Qh3+ 22. Kg1 Qg3+ 23. Kh1 {Accuracy: White = 30%, Black = 42%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.6"]
[White "Ricardi, Pablo"]
[Black "Molina, Pablo Sebastian"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2485"]
[BlackElo "2277"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,119,29,18,50,52,48,36,33,22,53,43,36,70,58,29,317,316,285,301,263,184,191,179,258,266,291,304,296,291,279,271,231,197,263,263,265,266,259,289,350,307,383,386,366,363,325,320,306,312,340,339,412,429,456,454,446,446,420,387,400,403,384,379,442,446,541,521,433,312,301,300,762,740,856,849,29972,29973,29969,29969,29981,29981,29986,29987,29989,29988,29989,29986,29986,8,29973,29974,29972,29970,29988,29989,29989,29982,29994,29993,29993,29978,29994,29995]} 1. e4 c5 2. Nf3 e6 3. d3 Nc6 4. g3 g6 5. Bg2 Bg7 6. O-O Nge7 7. Re1 d6 8. c3 O-O 9. d4 cxd4 10. cxd4 d5 {A04: Unusual lines after 1 Nf3 and King's Indian Attack} 11. e5 Nf5 (11... b6 12. Nc3 Ba6 13. Bf4 h6 14. h4 Nf5 15. Qa4 Bb7 16. Rac1 a6 17. Qd1 b5 18. Qd2 {1-0 (30) Saric,I (2678)-Sprenger,J (2510) Bol 2015}) 12. Nc3 f6 {White is slightly better.} 13. g4 Nh4 $146 ({Predecessor:} 13... fxe5 14. gxf5 e4 15. Ne5 Nxe5 16. dxe5 Bxe5 17. f4 Bg7 18. fxe6 Bxe6 {1-0 (61) Morgunov,M (2130)-Schwabeneder,F (2382) Graz 2017}) 14. Nxh4 {[#] Strongly threatening Nf3.} fxe5 15. Nf3 {[%cal Rd4e5]} exd4 16. Bg5 Bf6 $2 {[%mdl 8192]} (16... Qd7 $11 {and Black is okay.}) 17. Bxf6 $18 Qxf6 18. Nb5 e5 19. h3 e4 {Threatens to win with ...Bxg4.} 20. Nfxd4 a6 {[#]} (20... Qxf2+ $142 21. Kh1 Nxd4) 21. Nc7 $1 {[%csl LRa8,LRd5][%cal Bb5c7,Bc7a8,Ba8c7][%mdl 32] And now Nxc6 would win.} Nxd4 22. Nxa8 Be6 23. Nc7 Qxf2+ 24. Kh1 Nf3 25. Qe2 (25. Nxe6 $2 Qg3 $19) 25... Nxe1 (25... Qg3 $142 26. Bxf3 Rxf3 27. Nxe6 (27. Qh2 $2 Qh4 $19) 27... Qh4) 26. Qxe1 ({Less strong is} 26. Rxe1 Qxe2 27. Rxe2 Bf7 $14) 26... Qb6 27. Nxe6 Qxe6 28. Rd1 Rf7 29. Qd2 Rd7 30. Qd4 {aiming for Bxe4!} Qf7 31. Kg1 ({Worse is} 31. Bxe4 dxe4 32. Qxd7 Qf3+ 33. Kg1 Qg3+ 34. Kh1 Qf3+ 35. Kh2 Qf2+ 36. Kh1 Qf3+ $11) 31... Qf4 32. Rf1 Qc7 33. a3 Qd6 34. g5 Re7 35. h4 Qe5 36. Qxe5 Rxe5 {[%mdl 4096] Endgame KRB-KR} 37. Kf2 h6 38. gxh6 Kh7 39. Ke3 Kxh6 40. Kd4 Re7 41. Kxd5 Rd7+ 42. Kxe4 Rd2 43. Kf3 Rxb2 44. Kg3 b5 $2 (44... Ra2 45. Bxb7 Rxa3+ 46. Rf3 Ra1) 45. Rf6 Rb3+ 46. Kg4 Rxa3 47. Be4 Kg7 48. Rxg6+ Kh8 49. Rb6 Ra4 50. Kf5 Ra1 51. Kg5 Rg1+ 52. Kh6 Rg4 53. Rb8+ Rg8 54. Rb7 {[%csl Ge4,Gh6][%cal Rb7h7] White mates.} Rd8 55. h5 a5 56. Bf5 Re8 57. Bg6 Rf8 58. Rh7+ Kg8 59. Rg7+ Kh8 60. Bf7 {Accuracy: White = 82%, Black = 48%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.7"]
[White "Acosta, Pablo Ismael"]
[Black "Quiroga, Facundo"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2467"]
[BlackElo "2267"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,79,19,0,0,0,0,0,2,-3,0,0,34,7,25,0,16,0,0,0,0,-5,0,-8,0,0,0,0,22,0,19,17,17,17,7,14,9,7,15,16,16,3,3,0,10,0,112,112,112,121,168,168,184,196,170,134,141,115,140,0,8,0,97,89,106,108,233,179,381,384]} 1. d4 Nf6 2. Nf3 g6 3. Bf4 Bg7 4. e3 O-O 5. h3 d6 6. Be2 Nc6 7. O-O e5 {A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems} (7... Nd7 8. Bh2 e5 9. Nc3 exd4 10. Nxd4 Nxd4 11. exd4 Re8 12. Qd2 Nf8 13. Bc4 Be6 14. Bxe6 Nxe6 15. Ne2 Qg5 16. Qd3 Qd5 {½-½ (68) Nakamura,H (2767)-Aronian,L (2797) Saint Louis 2014}) 8. Bh2 {[%cal Rd4e5]} exd4 9. exd4 Re8 {The position is equal.} 10. Na3 $146 ({Predecessor:} 10. Nc3 Bf5 11. Bd3 Qc8 12. a3 Bxd3 13. Qxd3 a6 14. Bf4 Ne7 15. Rae1 {1-0 (57) Nguyen,N (2634)-Gallagher,J (2473) Tromsoe 2014}) 10... Bh6 11. Re1 Nd5 12. Bc4 Be6 13. Bg3 Qd7 14. Bh4 Bg7 15. c3 h6 16. Bg3 a6 17. Bf1 Nf6 18. Nc4 b5 19. Ne3 {aiming for d5.} Nd5 20. a4 (20. Rc1 {seems wilder.} Nce7 21. b3 Nxe3 22. fxe3 Nf5 23. Bf2) 20... Rab8 (20... Nce7 {is more complex.} 21. Bd3 Nb6 22. Be4 Nbd5 23. Bd3) 21. axb5 axb5 22. Nxd5 Bxd5 23. Rxe8+ Qxe8 24. Ne1 Ne7 {[%cal Bc6e7,Be7f5,Bf5g3,Bg3f1][%mdl 32]} 25. Nd3 Nf5 26. Nb4 Nxg3 27. Nxd5 Nxf1 28. Qxf1 Qe4 (28... c6 $11 29. Re1 Qd7 30. Ne7+ Kh7) 29. Nxc7 $16 Qc2 30. Qb1 Qb3 {[#]} 31. Qa2 $1 {[%cal Ra2b3]} Qc2 32. Nd5 Re8 33. Ne3 Qe2 34. Qb3 h5 35. Ra7 (35. Nd5 $16) 35... Re6 36. Ra1 $36 {[%mdl 2048] White is more active.} Bh6 (36... Re8 $11) 37. Nd5 h4 38. Rf1 Kg7 {[#]} (38... Bd2 $16 {was necessary.} 39. Qd1 Qc4 40. Qxd2 Qxd5) 39. Nc7 $1 $18 {[%cal Rc7e6]} Rf6 $2 (39... Re7) 40. Qxb5 {Accuracy: White = 51%, Black = 43%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.8"]
[White "Slipak, Sergio"]
[Black "Villegas, Franco"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2427"]
[BlackElo "2231"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,69,4,2,5,8,-21,-17,-29,-17,-13,-11,-2,12,5,8,17,18,18,21,18,19,0,23,29,45,35,69,50,74,60,140,156,196,193,189,195,213,180,174,132,277,101,100,89,630,624,626,634,623,623,600,590,556,293]} 1. e4 c5 2. c4 Nc6 3. Nc3 g6 4. g3 Bg7 5. Bg2 d6 6. d3 e6 7. Nge2 Nge7 8. O-O O-O 9. Rb1 b6 10. Be3 {A36: Symmetrical English vs ...g6: 4 Bg2 Bg7} Nd4 11. e5 Rb8 12. exd6 {The position is equal.} Qxd6 13. Nxd4 cxd4 14. Ne4 Qd7 15. Bh6 Bb7 16. Re1 $146 ({Predecessor:} 16. Bxg7 Kxg7 17. b4 h6 {½-½ (48) Kuzmicz,K (2451)-Ragger,M (2646) Warsaw 2013}) 16... f6 17. Bxg7 Kxg7 18. b4 e5 19. b5 Rbc8 20. a4 Bxe4 21. Rxe4 Rc5 22. Re2 Qc7 23. a5 bxa5 (23... h5 $14) 24. Ra2 $16 f5 25. Rba1 Nc8 26. Rxa5 Rf7 27. Qd2 Qd8 28. Qb4 Rfc7 {[#]} (28... Rcc7 $16 {was worth a try.} 29. c5 Qf8) 29. Rxa7 $2 (29. Bb7 $1 $18 {[%mdl 512]}) 29... Nxa7 30. b6 $1 $36 {[%csl LRa7,LRc7][%mdl 2048] White is on the roll.} Qb8 $2 {[%mdl 8192]} (30... Nc8 $16) 31. Qxc5 $18 {[%mdl 64] Promotion. White is clearly winning.} Rxc5 32. bxa7 Qd8 {[#] ...Rc8 is the strong threat.} 33. a8=Q Qxa8 34. Rxa8 e4 35. Re8 {Accuracy: White = 53%, Black = 31%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.9"]
[White "Dolezal, Cristian"]
[Black "Alarcon Careaga, Gustavo"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2392"]
[BlackElo "2138"]
[Annotator "TA"]
[PlyCount "131"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,131,0,-18,0,-27,-19,-26,0,0,8,19,17,8,9,-22,-20,-43,-46,-58,-8,-59,-16,-65,-37,-55,-55,-89,-39,-46,-11,-33,-9,-20,0,-85,-86,-83,-75,-129,-23,-99,-65,-138,-25,-125,-98,-137,-110,-154,-53,-97,-95,-125,-81,-130,-89,-181,22,32,12,16,416,431,411,197,195,212,279,283,287,272,260,233,217,222,316,316,316,316,316,316,316,288,316,308,383,395,397,386,431,424,420,416,438,431,433,416,410,411,580,580,580,580,580,575,562,560,525,504,549,527,684,696,735,685,856,811,758,688,1166,1122,1022,751]} 1. d4 d5 2. c4 c6 3. Nf3 e6 4. cxd5 exd5 5. Nc3 Bd6 6. g3 Ne7 {D31: Queen's Gambit Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and Exchange Variation lines without ...Nf6} 7. Bf4 Bxf4 8. gxf4 Qb6 $146 {Black has an edge.} ({Predecessor:} 8... Nd7 9. e3 Nf6 10. Qc2 Bf5 11. Bd3 Bxd3 12. Qxd3 O-O 13. O-O-O {½-½ (46) Inkiov,V (2475)-Semkov,S (2450) Sofia 1989}) 9. Qd2 Bf5 10. Nh4 Nd7 11. e3 Nf6 12. f3 O-O 13. Kf2 h6 14. Rg1 Bd7 15. Na4 ({White should try} 15. Kg2 $11) 15... Qd8 16. Bd3 b6 17. Nc3 c5 18. Ne2 Nc6 19. Nf5 Bxf5 20. Bxf5 Nh5 21. Rg4 Qf6 22. Bd7 (22. Bc2 $11) 22... cxd4 $17 23. exd4 Ne7 $36 {[%mdl 2048] Black has strong initiative.} 24. Rag1 (24. Re1 $142) 24... Rab8 ({Better is} 24... Rfd8 $17 25. Ba4 Nf5) 25. Bb5 (25. f5 $1 $11 Rbd8 26. Ba4) 25... Kh8 26. Bd3 (26. f5 $15) 26... Rfc8 (26... Nf5 $17 27. Bxf5 Qxf5) 27. Bb5 (27. Qe3 $11 {keeps the balance.}) 27... Rd8 28. Bd3 Rd6 29. Rc1 Rc6 (29... g6 $17 30. Rc7 Re6) 30. Rc3 Rbc8 31. Bb5 Rd6 32. Qc1 Rcd8 33. Qe3 (33. Re3 $17) 33... Nc6 $2 {[#]} (33... Re6 $19 34. Qd2 Nf5) 34. Bxc6 $11 Rxc6 35. Qe5 Re6 $2 {[%mdl 8192]} (35... Rxc3 $11 {and Black stays safe.} 36. bxc3 (36. Nxc3 g6 $11) 36... Qxe5 37. fxe5 (37. dxe5 Re8 $11) 37... Rc8) 36. Qxh5 $18 Rde8 37. Ng1 (37. Rc2 $142) 37... Qxd4+ 38. Kg2 Qd2+ 39. Kh1 Qxb2 40. Rc7 R6e7 41. Rxe7 Rxe7 42. Qxd5 Kh7 (42... Qf6 $142 43. Qd2 Re8) 43. Qd3+ g6 44. f5 {[%cal Rf5g6]} Qf6 45. fxg6+ fxg6 46. Re4 Rf7 47. Rd4 Qe6 48. Rd6 Qf5 49. Qxf5 gxf5 {[%mdl 4096] Endgame KRN-KR} 50. Ne2 Rc7 51. a4 Rc2 52. Rd7+ Kg6 53. Ng1 a5 54. Rd6+ Kh5 (54... Kf7 $142 55. Rxb6 Ra2 56. Rxh6 Rxa4) 55. Rxb6 {White is clearly winning.} Rc4 56. Rb5 Rxa4 57. Rxf5+ Kg6 58. Rb5 Ra2 59. Nh3 a4 60. Ra5 a3 61. Kg1 Kf6 62. Nf2 Ke7 63. f4 Ra1+ 64. Kg2 h5 65. Rxh5 a2 66. Ra5 {Accuracy: White = 47%, Black = 30%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.28"]
[Round "8.10"]
[White "Pierrot, Facundo"]
[Black "Carraro, Denise"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2383"]
[BlackElo "2097"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,75,25,52,0,60,0,75,51,63,60,97,86,131,131,142,106,346,337,393,417,408,406,403,404,402,400,464,466,467,447,460,452,526,532,558,546,900,906,901,896,872,857,879,835,839,597,583,579,562,564,5197,5181]} 1. e4 e6 2. d4 d5 3. Nd2 Nf6 4. e5 Nfd7 5. Bd3 c5 6. c3 Nc6 7. Ne2 Qb6 8. Nf3 cxd4 9. cxd4 f6 10. exf6 Nxf6 11. O-O Bd6 12. Nc3 O-O 13. Be3 Qd8 14. Re1 {C06: French Tarrasch: 3...Nf6 4 e5 Nfd7 5 Bd3 main lines} ({White should play} 14. h3 $14) (14. Ng5 Bd7 15. f4 h6 16. Nf3 Ng4 17. Bd2 Nf6 18. Ne2 Qb6 19. Bc3 Rae8 20. Kh1 a6 21. h3 Ne7 {½-½ (61) Sairaj,D (1445)-Shreyas,G (1653) Mumbai 2019}) 14... a6 (14... Ng4 $11) 15. Rc1 (15. h3 $14) 15... Bd7 (15... Ng4 $11 {keeps the balance.}) 16. Bg5 {White is better.} Qb8 17. Bh4 Kh8 $146 ({Predecessor:} 17... b5 18. Bb1 Bf4 19. Bg3 Bxg3 20. hxg3 Qd6 21. Ne5 Rac8 {1-0 (41) Zugrav,W-Ebner,F Austria 1989}) 18. Bb1 Ng4 {[%cal Rd6h2]} 19. h3 Nh6 20. Ng5 g6 $2 (20... Be7 $16 {was worth a try.}) 21. Nxe6 $18 Bxe6 22. Rxe6 Bh2+ 23. Kh1 Qf4 {[#]} 24. g3 $1 {[%cal Rg3f4]} Qxf2 25. Re2 Qxd4 26. Rxh2 {White is clearly winning.} Qg7 {and the idea ...g5 leaves Black hopeful.} 27. g4 d4 28. Ne4 Rae8 29. Rf2 Rxf2 30. Bxf2 {Rxc6! is the strong threat.} Nf7 {[#]} 31. Rxc6 $1 bxc6 32. Bxd4 Ne5 33. Nd6 Re6 {[#]} 34. Nc4 $1 {[%mdl 576] Pin} Qf6 (34... Nxc4 35. Bxg7+) 35. Bxe5 Rxe5 36. Nxe5 Qxe5 37. Qd2 Qg3 38. Qc3+ {Accuracy: White = 74%, Black = 32%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.1"]
[White "Obregon, Andres Carlos"]
[Black "Villanueva, Mario"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2514"]
[BlackElo "2482"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,69,-7,-13,35,36,74,79,92,81,76,85,80,49,53,47,38,10,55,54,60,60,93,82,131,135,418,413,375,369,675,662,882,859,834,793,800,793,854,839,1051,1051,1037,1032,2015,1981,1775,1684]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Ba5 6. Qg4 Ne7 7. Qxg7 Rg8 8. Qxh7 cxd4 9. b4 Bc7 10. Nb5 a6 11. Nxc7+ Qxc7 12. Bb2 Qxe5+ 13. Ne2 Nbc6 {C18: French: 3 Nc3 Bb4: Main line: 7 h4 and 7 Qg4} (13... Qc7 14. Ng3 e5 15. Be2 Be6 16. f4 exf4 17. Nh5 Qe5 18. O-O Bf5 19. Qh6 Rg6 20. Qxf4 Rxg2+ 21. Kxg2 Qxe2+ 22. Kg3 Qxh5 23. Bxd4 Nbc6 24. Rae1 Nxd4 25. Qxd4 Qh3+ 26. Kf2 Qxh2+ {0-1 (26) Timman,J (2655)-Khalifman,A (2656) Bali 2000}) 14. Qd3 Qc7 15. Nxd4 Ne5 {White is better.} 16. Qc3 Nc4 17. Bxc4 $146 ({Predecessor:} 17. Nf3 b5 18. g3 Bb7 19. O-O-O Rc8 20. Rg1 Nf5 21. Bxc4 Qxc4 22. Qxc4 Rxc4 {½-½ (48) McAndrew,H-Cameron,E IECG email 2003}) 17... dxc4 18. Ne2 b5 19. O-O Bb7 20. f3 O-O-O (20... Nd5 $5 {[%cal Rd5c3]} 21. Qd4 O-O-O $11) 21. Rf2 Nd5 22. Qe5 Qe7 23. Nc3 Qh4 24. Ne4 Nf4 $2 {[%mdl 8192] [#]} (24... Qe7 $16 25. Rd1 Rg6) 25. Qc5+ $1 $18 Kb8 26. Bf6 {[%mdl 64] Double Attack} Nh3+ $2 (26... Qh6 27. Bxd8 Rxd8 28. Qe5+ Ka8) 27. Kf1 {White is clearly winning.} Qh6 28. Bxd8 Rxd8 29. Qe5+ Ka8 30. gxh3 Qxh3+ 31. Ke2 Rd5 32. Qc7 {[#] Black must now prevent Nc5.} Qh8 33. Rg1 Qd4 34. Rg8+ Ka7 35. Kf1 {Accuracy: White = 88%, Black = 19%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.2"]
[White "Garcia Palermo, Carlos"]
[Black "Alonso, Salvador"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2407"]
[BlackElo "2497"]
[Annotator "TA"]
[PlyCount "137"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,137,35,37,35,29,4,14,21,21,9,22,21,20,19,9,12,24,16,11,0,0,0,0,0,29,36,41,13,30,16,19,16,25,15,36,0,0,0,33,10,29,20,14,2,1,1,81,9,4,0,75,21,52,0,0,0,0,0,60,62,373,381,576,573,633,30,56,49,49,26,56,56,39,49,50,74,232,56,79,58,76,87,98,70,255,278,291,288,286,286,276,269,278,274,387,364,309,309,566,563,563,555,567,567,560,560,556,549,540,519,526,526,526,429,389,367,380,290,29982,29983,29983,29984,29984,29985,29985,29986,29986,29982,29998,29999]} 1. d4 Nf6 2. c4 g6 3. f3 d5 4. cxd5 Nxd5 5. e4 Nb6 6. Be3 {D70: Grünfeld: Unusual White 3rd moves (met by ...d5)} (6. Nc3 Bg7 7. Be3 O-O 8. Qd2 e5 9. d5 c6 10. Rd1 cxd5 11. exd5 N8d7 12. Nh3 e4 13. fxe4 Ne5 14. Nf2 f5 15. Bc5 Rf7 16. Be2 f4 17. Bf3 {½-½ (25) Aronian,L (2805)-Vachier Lagrave,M (2789) London 2017}) 6... Bg7 7. Qd2 e5 $146 {[%cal Re5d4]} ({Predecessor:} 7... c6 8. Nc3 Be6 9. O-O-O Bc4 10. Nge2 Qd6 11. b3 Qa3+ 12. Qb2 Qxb2+ 13. Kxb2 Ba6 {½-½ (50) Garcia Palermo,C (2450)-Darcyl,T (2405) Buenos Aires 2017}) 8. d5 {The position is equal.} c6 {[%cal Rc6d5]} 9. Nc3 cxd5 10. Bb5+ Bd7 {aiming for ...d4.} 11. Bxb6 axb6 12. Bxd7+ Nxd7 {[%cal Bb8d7,Bd7c5,Bc5b3,Bb3a1][%mdl 32]} 13. Nxd5 Nc5 14. Ne2 Nb3 $1 {[%cal Rb3d2]} 15. Qc3 $1 {[%cal Rc3b3]} Nxa1 16. Nc7+ Kd7 17. Nxa8 Qxa8 18. O-O Rc8 19. Qd2+ Ke8 20. Rxa1 Qa4 21. Rd1 Bf8 22. b3 Qc6 23. Kf1 Qe6 24. Qd3 Bc5 25. b4 Be7 26. Nc3 Qc4 27. Nd5 b5 (27... Bg5 $11 {keeps the balance.}) 28. a3 (28. Qxc4 $16 bxc4 29. Ke2) 28... Bg5 $11 29. g3 Kf8 (29... h5 $11 {remains equal.}) 30. h4 (30. Nb6 $16 Qxd3+ 31. Rxd3 Rc1+ 32. Kg2) 30... Bd8 31. Ke2 (31. Qxc4 $1 $14 bxc4 32. a4) 31... Qa2+ 32. Rd2 $1 {[%cal Rd2a2]} Qa1 $1 {[%cal Ra1g1] Strongly threatening ...Qg1.} 33. Ne3 Kg7 ({Black should play} 33... Qg1 $11 34. Qd7 (34. Qxb5 Bf6 $17) 34... Ra8) 34. Qd7 $1 $36 {[%cal Rd7c8][%mdl 2112] Double Attack. White is pushing.} Rb8 $2 {[%mdl 8192]} (34... Qc1 $1 $14) 35. Qe8 $1 $18 Bc7 (35... Bxh4 $142 36. Qxb8 Bxg3) 36. Qe7 Bb6 37. Nd5 $2 (37. Ng4 $1 $18 {Threatening mate with Qf6+.} h5 38. Qf6+ Kg8 39. Nh6+ {[%mdl 64] Double Attack} (39. Qxb6 hxg4 40. Rd8+ Rxd8 $11) 39... Kh7 40. g4 (40. Qxb6 Kxh6 41. Qxb5 Rc8 $11) (40. Nxf7 Qg1 $11) 40... hxg4 41. Nxg4) 37... Bd4 38. Qf6+ Kg8 $1 39. Ne7+ Kf8 40. Nxg6+ hxg6 41. Qh8+ Ke7 42. Qxb8 $14 {[%mdl 4096] Endgame KQR-KQB} Qc3 $2 {[#]} (42... Qh1 $16) 43. Qxb7+ $2 (43. Rxd4 $1 $18 exd4 (43... Qxd4 44. Qxb7+) 44. Qe5+ (44. Qxb7+ Kf6 $14) 44... Kd8 45. Qg5+ (45. Qxb5 Qe3+ 46. Kd1 Qxf3+ 47. Kd2 Qg2+ 48. Kd1 Qxe4 $11) 45... Kd7 46. Qxb5+ {[%mdl 64] Double Attack} Kd8 47. Qd5+ (47. Qxb7 Qe3+ 48. Kd1 Qxf3+ 49. Kd2 Qc3+ 50. Ke2 Qe3+ 51. Kf1 Qf3+ 52. Ke1 Qxg3+ 53. Kf1 Qf3+ 54. Ke1 Qg3+ 55. Kd2 Qe3+ 56. Kc2 Qc3+ 57. Kd1 Qf3+ 58. Ke1 Qg3+ $11) 47... Ke8 48. Qb5+ (48. Qxb7 Qe3+ 49. Kd1 Qxf3+ 50. Kd2 Qc3+ 51. Ke2 Qe3+ 52. Kf1 Qf3+ 53. Ke1 Qxg3+ 54. Ke2 Qe3+ 55. Kf1 Qf3+ 56. Ke1 Qg3+ 57. Ke2 Qe3+ 58. Kf1 Qh3+ 59. Kg1 Qg3+ 60. Kf1 Qh3+ 61. Kf2 Qe3+ 62. Kf1 $11) 48... Kd8 49. Qd3 (49. Qxb7 Qe3+ 50. Kd1 Qd3+ 51. Ke1 Qe3+ 52. Kd1 Qd3+ 53. Kc1 Qxa3+ 54. Kd2 Qc3+ 55. Ke2 Qe3+ 56. Kd1 Qxf3+ 57. Kc2 Qc3+ 58. Kb1 Qe1+ 59. Ka2 Qf2+ 60. Kb1 Qe1+ 61. Ka2 Qf2+ 62. Kb1 Qe1+ $11)) 43... Kf8 44. Qxb5 {Rxd4! is the strong threat.} Qe3+ 45. Kd1 {Threatens to win with Qd3.} Qxf3+ {[#]} 46. Qe2 $1 {[%cal Re2f3]} Qxa3 $2 (46... Qb3+ $1 $14 47. Rc2 Qxg3) 47. Qd3 $18 Qxb4 {[#]} 48. Ke2 $1 Qa4 49. Kf3 Kg7 50. Kg2 Qa1 51. Rd1 Qa2+ (51... Qa8 $142 52. Qf3 Qa2+ 53. Kh3 Qe6+ 54. g4 Bc5) 52. Kh3 Qe6+ 53. g4 Qf6 $2 (53... Qa2 {was necessary.} 54. Qf3 Qe6) 54. Rf1 Qe6 55. Rf3 Qa2 {intending ...Bg1.} 56. Qb3 Qa7 57. Qd5 Qe7 58. g5 Qc7 59. Kg3 Bc3 60. Rf1 Bb2 61. Qd2 Bd4 62. Qd3 Qa7 {If Black can now play ...Be3 this consolidates a bit.} 63. Qf3 Qa2 $2 (63... Kg8 $18 64. Qf6 Qd7) 64. h5 {White mates.} gxh5 65. Qf6+ Kh7 {[#]} 66. g6+ $1 {[%mdl 512]} fxg6 67. Qe7+ Kh6 68. Qf8+ Kg5 {[#]} 69. Rf5+ $1 {[%mdl 512] Accuracy: White = 58%, Black = 39%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.3"]
[White "Ricardi, Pablo"]
[Black "Dolezal, Cristian"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2485"]
[BlackElo "2392"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,112,13,10,0,18,8,14,16,7,12,24,-14,-11,-31,-32,-50,-50,-50,-50,-50,-50,-74,-65,-101,-88,-116,-114,-116,-120,-119,-113,-112,-110,-114,-87,-84,-76,-86,-95,-84,-52,-63,-65,-68,-49,-52,-45,-87,-30,-88,-76,-96,-118,-237,-231,-230,-230,-219,-228,-232,-218,-297,-193,-212,-211,-359,-318,-491,-444,-498,-325,-575,-585,-579,-570,-579,-518,-492,-475,-482,-404,-352,-320,-321,-318,-318,-318,-295,-291,-372,-343,-445,-436,-473,-434,-1098,-987,-949,-405]} 1. Nf3 Nf6 2. g3 b6 3. Bg2 Bb7 4. O-O g6 5. c4 Bg7 6. Nc3 O-O 7. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} Ne4 8. Bd2 {A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6)} d6 {LiveBook: 12 Games} (8... e6 9. Nxe4 Bxe4 10. Bc3 c5 11. Rc1 Nc6 12. e3 Qc7 13. Qd2 Qb7 14. Ne1 cxd4 15. exd4 Ne7 {½-½ (43) Lenic,L (2662)-Vachier Lagrave,M (2789) chess.com INT 2018}) 9. Rc1 Nd7 10. d5 {The position is equal.} Nxd2 11. Qxd2 a5 $146 ({Predecessor:} 11... Ne5 12. Nxe5 Bxe5 13. f4 Bg7 14. Nb5 Qd7 15. Nd4 Qa4 {1-0 (48) Meskovs,N (2535)-Moiseenko,V (2495) Finland 2018}) 12. Nd4 Nc5 13. Nb3 a4 14. Nxc5 bxc5 15. Qc2 Qd7 16. e3 Rfb8 17. Rb1 Bc8 18. h3 Rb4 19. Ne4 Qe8 20. Nd2 Bf5 21. e4 Bd7 22. f4 Bd4+ 23. Kh2 Qb8 {[%cal Rb4b2]} 24. b3 Qa7 25. Nf3 Bg7 26. Rf2 axb3 27. axb3 Qa3 28. g4 Rab8 {[%cal Rb4b3]} 29. Nd2 Bd4 30. Re2 e5 $36 {[%mdl 2048] Black is more active.} 31. f5 f6 (31... R4b7 $17 32. Qd1 Qb4) 32. fxg6 (32. h4 $11 {keeps the balance.}) 32... hxg6 $17 33. Rf1 Rf8 34. g5 (34. Qd3 $17 {keeps fighting.}) 34... fxg5 $19 35. Rxf8+ Kxf8 36. Re1 {[#]} Kg7 $1 37. Qd3 {[#]} Qa8 $1 38. Nf3 Qd8 39. Rf1 g4 40. Nxd4 (40. hxg4 $142 Bxg4 41. Bh3 Bxh3 42. Kxh3) 40... cxd4 41. hxg4 (41. Qg3 {only move.} Qg5 42. hxg4) 41... Qh4+ 42. Kg1 Qxg4 43. Qd2 $2 (43. Rf2) 43... Rxb3 44. Qf2 {[#] Threatening mate with Qf8+.} Qf4 $1 45. Qxf4 exf4 46. Rxf4 {[%mdl 4096] Endgame KRB-KRB} Rc3 47. Bf1 d3 48. Rf2 {If only White now had time for Rd2....} Ba4 49. Rd2 Bc2 ({Much less strong is} 49... Rxc4 50. Bxd3 Rd4 51. Kf2 $19) 50. Kf2 Kf6 ({Less strong is} 50... Rxc4 51. Ke3 $19) 51. Ke3 Ke5 ({Not} 51... Rxc4 52. Bxd3 Bxd3 53. Kxd3 $17) 52. Rg2 Rxc4 53. Rg4 Ra4 {Black is clearly winning.} 54. Bg2 {[#]} d2 $1 55. Rxg6 (55. Kxd2 $142 Bxe4 56. Bxe4 Rxe4 57. Rxg6) 55... d1=N+ 56. Kd2 Bxe4 {Precision: White = 28%, Black = 73%.} (56... Ra2 $142 57. Rg7 Kf6) 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.4"]
[White "Romero Barreto, Jaime Jose"]
[Black "Acosta, Pablo Ismael"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2337"]
[BlackElo "2467"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,76,-3,-7,-34,-33,-66,-63,-64,-52,-84,-54,-81,-77,-106,-101,-270,-289,-336,-325,-331,-344,-349,-341,-339,-316,-341,-356,-432,-285,-280,-161,-160,-110,-97,-80,-80,-99,-362,-206,-187,-193,-195,-90,-89,0,0,0,0,398,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. f4 a6 7. Be3 b5 8. Nxc6 Qxc6 9. Be2 Ba3 10. bxa3 {B49: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 7 Be2} (10. Nxb5 axb5 11. bxa3 Qxe4 12. Bd4 Bb7 13. Qd3 Ne7 14. Qxe4 Bxe4 15. Bxb5 Bxc2 16. Rc1 Ba4 17. Bd3 Bc6 {0-1 (46) Ponomariov,R (2731)-Ivanchuk,V (2731) Beijing 2013}) 10... Qxc3+ 11. Kf2 {aiming for Bd4.} Nf6 12. Bf3 {Black is slightly better.} Bb7 13. Bd4 Qxa3 14. Re1 O-O 15. Bxf6 $146 ({Predecessor:} 15. Re3 Qe7 16. Kg1 d5 17. e5 Ne4 18. Bxe4 dxe4 {1-0 (33) Manduch,M-Kotenko,G ICCF corr 1987}) 15... gxf6 16. Qxd7 $2 (16. c3 $17) 16... Qc5+ $19 17. Kg3 {[#]} Rfd8 $1 {[%cal Rd8d7]} 18. Qxb7 Ra7 {[%mdl 64] Trapped Piece} 19. Rad1 Rxb7 20. Rxd8+ Kg7 21. Red1 Rc7 (21... Qxc2 22. R8d2 $19) 22. Ra8 Rc8 23. Rxa6 h5 ({Weaker is} 23... Qxc2 24. Rd7 $17) (23... Kh8 $142 24. h3 Qxc2) 24. Rd7 h4+ ({Not} 24... Qe3 25. Rxe6 Qe1+ 26. Kh3 $11) 25. Kh3 Rc7 26. Rd8 {Threatens to win with Raa8.} Ra7 ({Wrong is} 26... Qxc2 $2 27. Raa8 $18) 27. Rad6 $2 {[%mdl 8192]} (27. Rxa7 $17 Qxa7 28. Rc8) 27... Rxa2 (27... f5 $142 28. e5 Qe3) 28. f5 exf5 29. Rd5 Qc7 (29... Qxc2 $19 {and Black stays clearly on top.} 30. exf5 Qb1) 30. exf5 $17 Rxc2 (30... Ra4 $17 31. R8d7 Qc3) 31. Re8 $1 $11 {Hoping for Rdd8.} Qf4 {...Rc3 is the strong threat.} 32. Re4 Qc1 $2 {[%mdl 8192] [#]} (32... Qb8 $11 {and Black stays safe.}) 33. Rg4+ $2 (33. Rd1 $1 $18) 33... Kh7 $1 {The position is equal.} 34. Rxh4+ Kg7 35. Rg4+ Kh7 $1 36. Rh4+ Kg7 37. Rg4+ Kh7 $1 38. Rh4+ Kg7 {Accuracy: White = 53%, Black = 70%.} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.5"]
[White "Slipak, Sergio"]
[Black "Pierrot, Facundo"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2427"]
[BlackElo "2383"]
[Annotator "TA"]
[PlyCount "41"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,20,12,21]} 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O Be7 5. d4 O-O 6. c4 dxc4 7. Qc2 a6 8. Qxc4 b5 9. Qc2 Bb7 10. Bd2 Be4 {LiveBook: 1267 Games} {Predecessor:} 11. Qc1 $146 Bb7 12. Rd1 Qc8 13. Ba5 c5 14. dxc5 Bxc5 15. Nbd2 Nbd7 16. Nb3 Ba7 17. Qf4 Nb6 18. Bxb6 Bxb6 19. Rac1 Qe8 20. Ne5 Bxg2 21. Kxg2 {½-½ (75) Ding,L (2813)-Radjabov,T (2757) Wijk aan Zee 2019} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.6"]
[White "Zapata Charles, Santiago"]
[Black "Perez, Maximiliano"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2303"]
[BlackElo "2418"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,73,14,28,18,20,17,19,0,16,31,43,28,47,21,35,0,0,0,0,0,0,0,-5,-10,-15,-14,16,7,9,-14,-16,-55,-27,-41,-14,-132,-139,-151,-141,-195,-193,-185,-182,-305,-313,-305,-304,-302,-269,-274,-236,-360,-342,-602,-594,-612]} 1. e4 e5 2. Bc4 Nf6 3. d3 Bc5 4. Nf3 Nc6 5. O-O O-O 6. Nbd2 {C50: Hungarian Defence and Giuoco Pianissimo} a6 7. h3 d6 8. a4 Ba7 9. c3 h6 10. Re1 Be6 {LiveBook: 50 Games} 11. Bxe6 fxe6 12. b4 Nh5 13. Nc4 Qf6 14. Ra2 b5 {[#]} 15. Na3 $146 Rab8 16. Kh1 Qf7 17. Be3 Bxe3 18. Rxe3 Nf4 19. Ng1 d5 20. g3 Nh5 21. axb5 axb5 22. Nc2 Ra8 23. Rxa8 Rxa8 24. Kg2 d4 $36 {[%mdl 2048] Black has good play.} 25. Rf3 Qd7 26. Ne2 Qd6 27. Qc1 (27. Qb1 $11 {keeps the balance.}) 27... dxc3 $17 28. Nxc3 Nxb4 29. Nxb5 (29. Qb2 $17 {is a better defense.} Nxc2 30. Qxc2) 29... Qc5 $19 ({Weaker is} 29... Nxd3 30. Qf1 $16 (30. Nxd6 Nxc1 31. Nf7 c5 $11)) 30. Nba3 {[#]} Nxc2 $1 31. Nxc2 (31. Qxc2 $142 Qxa3 32. Qxc7) 31... Ra2 32. Qb1 Rxc2 ({And not} 32... Qxc2 33. Qb8+ Kh7 34. Qe8 $11) 33. Qb8+ Kh7 34. Qe8 Nf6 35. Qxe6 (35. Qf7 $142 Kh8 36. Qxe6) 35... Qd6 36. Qf7 $2 {[#]} (36. Qf5+ Kg8 37. h4) 36... Rc3 37. Rf5 {Accuracy: White = 46%, Black = 68%.} 0-1

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.7"]
[White "Tristan, Leonardo"]
[Black "Fiorito, Fabian"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2504"]
[BlackElo "2366"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,61,11,18,25,34,20,16,8,14,14,14,0,51,52,84,74,81,79,126,145,135,136,125,104,274,260,260,271,277,277,265,260,262,276,262,279,293,283]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Nf3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 b6 12. O-O Bb7 13. Rfe1 Nd7 14. a4 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5} (14. Rad1 Rc8 15. Bb3 Re8 16. h4 h6 17. Qf4 Qc7 18. Qxc7 Rxc7 19. d5 Nc5 20. d6 Rd7 21. Bc4 Red8 22. e5 Bxf3 23. gxf3 {1-0 (35) Vachier Lagrave,M (2779)-Dominguez Perez,L (2739) chess.com INT 2018}) 14... Rc8 15. Bd3 a5 16. Rab1 {The position is equal.} h6 17. Qb2 $146 ({Predecessor:} 17. Qf4 Rc3 18. Red1 Qe7 19. h4 Rfc8 20. Bb5 Nf6 21. Re1 Qc7 {0-1 (48) Antonsen,M (2470)-Hansen,C (2625) Svendborg 2015}) 17... Qc7 18. Qa3 Nf6 (18... Rfd8 $11) 19. Ne5 $14 Rfd8 20. Rec1 Qd6 21. Qxd6 Rxc1+ 22. Rxc1 Rxd6 {[#]} 23. f3 $1 {Black must now prevent Rc7.} Nd7 24. Bb5 $36 {[%mdl 2048] White has strong initiative.} Nb8 $2 (24... Nxe5 $16 25. dxe5 Rd8) 25. Rc7 {White has a decisive advantage.} Ba6 26. Bxa6 Nxa6 27. Rc8+ (27. Rxf7 Rxd4 28. Rb7 Rb4 $11) 27... Kh7 28. Rh8+ $1 {[%mdl 64] [#] Decoy} ({Not} 28. Nxf7 Rxd4 29. Rc6 Nc5 $11) 28... Kxh8 29. Nxf7+ {[%mdl 64] Double Attack} Kg8 30. Nxd6 Nb4 31. Nc4 {Accuracy: White = 77%, Black = 39%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.8"]
[White "Spata, German"]
[Black "Hungaski, Robert"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2320"]
[BlackElo "2505"]
[Annotator "TA"]
[PlyCount "36"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,19,33,6]} 1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. d4 Nf6 5. O-O O-O 6. c4 c6 7. cxd5 cxd5 8. Nc3 Nc6 9. Ne5 e6 10. f4 {Predecessor:} Bd7 $146 11. e3 Rc8 12. Bd2 Be8 13. Rc1 Nd7 14. Nd3 a6 15. Kh1 Nb6 16. b3 Qe7 17. Rc2 Bd7 18. Nc5 Rc7 {1-0 (62) Vasquez Schroder,R (2506)-Andreikin,D (2645) ICC INT 2010} 1/2-1/2

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.9"]
[White "Saldano Dayer, Horacio"]
[Black "Bustos, Cristian"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2422"]
[BlackElo "1999"]
[Annotator "TA"]
[PlyCount "135"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,135,27,27,32,20,23,18,41,33,39,10,76,86,78,72,67,62,79,56,61,31,37,34,79,84,89,90,106,35,43,-79,62,0,0,0,13,0,61,-16,-15,-16,-5,-32,-19,-29,-27,-27,-31,-58,-26,-108,-33,-33,-33,-72,0,-60,-36,-87,-28,-25,-19,-60,-49,-51,-30,-75,-60,-58,-58,-58,-43,-29,-29,-46,52,5,41,-53,64,-18,67,0,0,0,0,6,52,24,22,0,0,-87,27,0,0,0,0,0,0,0,45,0,226,-12,-34,-27,774,778,747,735,655,671,2039,1414,1356,1204,1058,1026,29991,1077]} 1. Nf3 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. O-O O-O 6. b3 Nbd7 7. Bb2 c6 8. e3 {A14: English Opening: 1...e6 with b3 by White} a5 (8... b6 9. Nc3 Bb7 10. Qe2 e5 11. d4 e4 12. Nh4 Re8 13. f3 exf3 14. Qxf3 Bb4 {1-0 (30) Mareco,S (2643)-Beerdsen,T (2469) Vlissingen 2018}) 9. Nc3 {LiveBook: 12 Games} Ne4 10. Qc2 $146 {White is slightly better.} ({Predecessor:} 10. Nxe4 dxe4 11. Nd4 Nc5 12. Qg4 g6 13. Qe2 f5 14. Ba3 e5 15. Bxc5 Bxc5 {0-1 (23) Balic,A (2071)-Mijovic,S (2413) Niksic 2016}) 10... Nxc3 11. Bxc3 Bf6 12. d4 Re8 13. Rab1 dxc4 (13... b5 $11) 14. bxc4 $16 e5 15. Rfd1 $36 {[%mdl 2048] And now dxe5 would win. Black is under strong pressure.} exd4 16. exd4 Nb6 17. Qb3 Ra6 18. Ne5 Bf5 19. Rbc1 Qe7 20. Re1 {Threatens to win with Nxc6.} a4 21. Qb2 {Black must now prevent Nxc6.} Be6 {[#]} 22. Bb4 (22. Bf1 $1 $16) 22... Qd8 $14 23. Rcd1 (23. Re4 $14 {keeps the upper hand.}) 23... Qc7 (23... Nxc4 $17 24. Qe2 Bxe5 25. dxe5 Qb6) 24. c5 (24. Qc3 $14) 24... Nd5 $11 25. Bd2 Raa8 26. Nc4 Red8 (26... a3 $11 27. Qa1 Qd7) 27. Nd6 (27. Bxd5 $14 cxd5 28. Bf4) 27... b5 28. a3 Be7 29. Ne4 (29. Bxd5 $5 Bxd5 30. Bb4 $11) 29... h6 30. Rc1 Qd7 31. h4 Re8 32. Rcd1 Rad8 33. Qc1 (33. Ba5 $11) 33... Bf8 (33... Bg4 $17 34. f3 Be6) 34. Ba5 $15 Ra8 35. Bd2 Rad8 (35... Bg4 $17 36. f3 Be6) 36. Kh2 (36. Ba5 $1 $11) 36... Qc7 37. Kh1 (37. Qc2 $15) 37... Qc8 (37... Bg4 $17 38. Nc3 Nxc3 {[%mdl 64] Discovered Attack} 39. Bxc3 Bxd1 40. Rxe8 Rxe8 41. Qxd1 Be7) 38. Ba5 $11 Rd7 $1 39. Kh2 Qa8 40. Bd2 Qd8 41. f3 Qc7 42. Nf2 Rde7 43. Re5 Bd7 44. f4 Nf6 45. Rde1 Nd5 (45... Be6 $15) 46. Nd3 Nf6 47. Nf2 (47. Kg1 $14) 47... Nd5 (47... Be6 $1 $15) 48. Qd1 ({White should try} 48. Bxd5 $14 cxd5 49. Nd3) 48... Qc8 ({Black should play} 48... Be6 $11) 49. Ne4 (49. Bxd5 $14 cxd5 50. Qf3) 49... Bg4 50. Bf3 Bxf3 51. Qxf3 Rxe5 52. fxe5 Qe6 53. Rf1 Rd8 54. g4 {[#]} (54. Kg2 $11) 54... Be7 (54... Nf6 $1 $17 {[%cal Rf6g4]} 55. Nd6 Nxg4+ 56. Kg1 f6) 55. g5 hxg5 56. Bxg5 Rd7 57. Rg1 Bxg5 58. Rxg5 Kf8 59. Nd6 Qh6 $2 (59... Ra7 $11) 60. Rh5 $2 (60. Nf5 $18 Qh8 61. Rxg7) 60... Qd2+ {[%mdl 64] Double Attack} 61. Kh3 Nf4+ $2 {[%mdl 8192] [#]} (61... Kg8 $11 62. Rf5 Qc3) 62. Qxf4 $1 $18 {[%mdl 512] Intending Rh8+ and mate.} Qd3+ (62... Qxf4 63. Rh8+) 63. Qg3 Qf1+ 64. Qg2 Qd3+ 65. Kh2 {White wants to mate with Rh8+.} g6 66. Rh8+ Kg7 67. Rc8 {Ne8+ would kill now.} Qxd4 68. Nf5+ {[%mdl 64] Double Attack. Accuracy: White = 26%, Black = 31%.} 1-0

[Event "Legislatura Portena Open 2019"]
[Site "Buenos Aires"]
[Date "2019.03.29"]
[Round "9.10"]
[White "Rodriguez, Jorge Luis"]
[Black "Coro, Lucas"]
[Result "1-0"]
[ECO "A00"]
[WhiteElo "2385"]
[BlackElo "2276"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "ARG"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,67,16,8,10,22,0,0,-35,46,33,23,10,24,16,77,60,82,17,52,25,33,3,43,36,197,199,207,212,201,202,200,195,201,195,179,156,175,169,750,742]} 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 Nd7 8. h5 Bh7 9. Bd3 Bxd3 10. Qxd3 e6 11. Bd2 Ngf6 12. O-O-O Be7 13. Ne4 Nxe4 14. Qxe4 Nf6 15. Qe2 Qd5 16. Kb1 {B19: Classical Caro-Kann: 4...Bf5 main line} Qe4 17. Qf1 (17. Qxe4 Nxe4 {½-½ (17) Bacallao Alonso,Y (2582)-Iturrizaga Bonelli,E (2628) Buenos Aires 2018}) 17... O-O 18. Bc1 {The position is equal.} Nd5 $146 (18... Rad8 $15) ({Predecessor:} 18... Qf5 19. Ne5 c5 20. g4 Nxg4 21. Nxg4 Qxg4 22. Bxh6 {0-1 (38) Ly,D (1914)-Dragnev,V (1912) Linz 2013}) 19. Ne5 Nb4 20. Nd3 a5 {[%cal Ba7a5,Ba5a4,Ba4a3][%mdl 32]} 21. c3 {White wants to play f3.} Na6 (21... Nxd3 $11 {remains equal.} 22. Qxd3 Qxd3+ 23. Rxd3 Bd6) 22. f3 $16 Qh7 23. Qe2 (23. Ka1 $1 $16) 23... a4 24. Ka1 a3 $1 25. b3 b5 26. Ne5 $36 {[%mdl 2048] White is pushing.} c5 $2 {[#]} ({Black should try} 26... Nc7 $14) 27. Ng6 $1 $18 {[%cal Rg6e7][%mdl 512]} Rfe8 (27... fxg6 28. Qxe6+) 28. Nxe7+ Rxe7 29. dxc5 ({Weaker is} 29. Bxa3 Rea7 $11) ({Don't do} 29. Qxb5 $6 cxd4 30. Qb6 (30. Rxd4 Qc2 $16) (30. cxd4 Qc2 $11) 30... Rc7 $16) 29... Nxc5 30. Qxb5 Rc7 {[#]} 31. Qe2 $1 Qf5 32. Rd4 Nb7 33. Qd3 Qa5 $2 (33... Qf6 34. Kb1 Rcc8) 34. Ra4 {Accuracy: White = 53%, Black = 24%.} 1-0

