[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Bruzon Batista, Lazaro"]
[Black "Chandra, Akshat"]
[Result "1-0"]
[ECO "D78"]
[WhiteElo "2664"]
[BlackElo "2492"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,69,0,0,0,0,0,11,0,0,4,16,0,49,56,45,58,55,57,69,65,86,88,186,193,211,231,371,328,372,358,371,370,353,364,341,365,337,333,418,419,398,399,570,567,566,550]} 1. Nf3 {Metz Alekhine/Primel,D} d5 2. g3 g6 3. Bg2 Bg7 4. d4 Nf6 5. O-O O-O 6. c4 c6 7. Qb3 Qb6 8. Nc3 Rd8 9. Rd1 {D78: Fianchetto Grünfeld: 6 0-0 c6} (9. Bd2 Be6 10. Na4 Qxb3 11. axb3 Nbd7 12. Rfc1 Ne4 13. Bb4 Nd6 14. e3 dxc4 15. bxc4 Nxc4 16. Bxe7 Re8 {½-½ (102) Rapport,R (2725)-Jones,G (2677) Douglas 2018}) 9... Bf5 10. Ne1 Be6 11. c5 Qxb3 12. axb3 Nbd7 13. b4 a6 {LiveBook: 4 Games} 14. h3 Ne8 15. Bf4 {[%cal Bc1f4,Bf4g3,Bg3c7][%mdl 32] [#]} h6 $146 ({Predecessor:} 15... f5 16. f3 Bf7 {½-½ (49) Maiorov,N (2552)-Libiszewski,F (2523) Metz 2012 EXT 2013 [Metz Alekhine/Primel,D]}) 16. g4 Nf8 17. e3 g5 18. Bg3 h5 19. gxh5 Nf6 20. Na4 N8d7 21. Nd3 Nxh5 22. Bc7 Rf8 {[#]} 23. Nb6 $1 $36 {[%mdl 2048] White is in control.} Rae8 {[#]} (23... Nxb6 $16 24. cxb6 Nf6) 24. b5 $1 $18 {[%cal Rb5a6]} axb5 25. Ra7 Nb8 (25... f5 {keeps fighting.} 26. Rxb7 f4) 26. Rxb7 Na6 27. Bh2 Bf5 28. Nd7 Bxd7 29. Rxd7 Nf6 30. Ra7 Ra8 31. Rxe7 Rfd8 32. Rb7 Nd7 33. Ra1 Naxc5 (33... Bf8 {was worth a try.} 34. Ra3 Bg7) 34. Rxa8 Nxb7 35. Ra7 {Precision: White = 93%, Black = 60%.} 1-0

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Swiercz, Dariusz"]
[Black "Cordova, Emilio"]
[Result "1/2-1/2"]
[ECO "E15"]
[WhiteElo "2649"]
[BlackElo "2597"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,47,8,33,8,14,9,8,8,28,31,36,33,29,7,15,9,7,5,8,5,7,0,0,-6,0,0,6,6,6,6,11,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. b3 Bb7 6. Bg2 Bb4+ 7. Bd2 a5 8. O-O O-O 9. Nc3 Re8 {LiveBook: 20 Games} 10. Rc1 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations} h6 11. Qc2 d6 $146 ({Predecessor:} 11... Bxc3 12. Bxc3 Be4 13. Qd2 d5 14. Qf4 Nbd7 15. Rfd1 c6 16. Bb2 a4 17. cxd5 Bxd5 {0-1 (37) Kortschnoj,V (2585)-Anand,V (2670) Roquebrune 1992}) 12. Rfe1 Bxc3 13. Bxc3 Be4 14. Qb2 c6 15. Bf1 b5 {The position is equal.} 16. c5 Bxf3 (16... b4 $5 17. Bd2 $8 dxc5 $11) 17. exf3 Nd5 18. Bd2 a4 19. b4 a3 20. Qb1 Ra4 21. Be2 dxc5 22. dxc5 Na6 {[%cal Rd5b4]} 23. Bd1 Ndxb4 24. Bc3 {Accuracy: White = 54%, Black = 56%.} 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Quesada Perez, Yuniesky"]
[Black "Hilby, Craig"]
[Result "1-0"]
[ECO "C95"]
[WhiteElo "2642"]
[BlackElo "2445"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,61,0,0,-8,29,35,29,11,29,18,19,14,83,65,126,52,225,232,332,332,308,224,1019,352,330,337,329,324,597,597,1041,1025,2157,1707]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 {[%cal Bf1b5,Bb5a4,Ba4b3][%mdl 32]} a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 d6 8. c3 O-O 9. h3 Nb8 10. d4 Nbd7 11. Nbd2 c5 12. Nf1 {C95: Closed Ruy Lopez: Breyer Variation with 10 d4} Re8 13. Ng3 Bf8 14. Bc2 cxd4 15. cxd4 exd4 {LiveBook: 9 Games} 16. Bf4 {[#]} d3 $146 ({Predecessor:} 16... Bb7 17. Nxd4 g6 18. Qd2 Nc5 19. Bg5 Bg7 {½-½ (37) Karjakin,S (2760)-Kovalev,V (2664) Batumi 2018}) 17. Qxd3 Nc5 18. Qd2 Bb7 {[%cal Rc5e4]} 19. Bg5 $1 h6 20. Bh4 Ne6 (20... Ncd7 $11 {keeps the balance.}) 21. Nf5 {[%cal Bg3f5,Bf5h6,Bh6g4][%mdl 32]} g5 {[#]} (21... Rc8 $14) 22. Bg3 (22. Nxg5 $1 $16 {Strongly threatening Nf3.} hxg5 23. Bxg5) 22... Nc5 $2 {[#]} (22... d5 $1 $14) 23. Nxg5 $1 $18 {[%mdl 512]} hxg5 (23... Nh5 $142) 24. Qxg5+ Kh8 25. Nh6 Qe7 $2 {[#]} (25... Bxh6 26. Qxh6+ Kg8) 26. e5 $2 (26. Bxd6 $1 {[%mdl 512]} Ne6 (26... Qxd6 27. Nxf7+) 27. Qh4 Bxh6 28. Qxh6+ Nh7 29. Bxe7 Rxe7 30. e5) 26... Ne6 27. Qh4 {Ng4+ would kill now.} ({Weaker is} 27. exf6 Nxg5 28. Rxe7 (28. fxe7 Bxh6 29. Bxd6 Bg7 $11) 28... Rxe7 $14) 27... Nh7 {Black wants to play ...Qxh4.} 28. Qh5 ({Not} 28. Qxe7 Rxe7 29. exd6 Rd7 $18) 28... Neg5 $2 (28... Bxh6 29. Qxh6 Neg5) 29. Ng4 {White is clearly winning.} dxe5 30. Rxe5 Qc7 31. Bxh7 {Accuracy: White = 64%, Black = 18%.} 1-0

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Prohaszka, Peter"]
[Black "Yoo, Christopher Woojin"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2613"]
[BlackElo "2388"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,100,38,31,0,0,-10,0,0,0,-28,-24,-24,-28,-31,-29,-19,-18,-30,-29,-69,-34,-32,-28,-54,-22,-91,-88,-89,-89,-251,-248,-240,-164,-135,-128,-131,-113,-127,0,0,0,-28,-29,-30,-37,-41,-11,-20,-19,-143,-149,-189,-198,-206,-200,-170,0,0,0,-162,-131,-274,-294,-331,-322,-318,-307,-323,-318,-500,-481,-472,-243,-608,-588,-622,-560,-698,-682,-754,-729,-1043,-1033,-1098,-976,-1323,-1093]} 1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d5 6. c4 Nc6 {A05: Réti Opening: 1 Nf3 Nf6} (6... c6 7. O-O Bg4 8. d3 e6 9. Nbd2 Bxf3 10. Nxf3 Nbd7 11. Qc2 Ne8 12. d4 Nd6 13. e3 Ne4 14. Ne1 f5 15. Nd3 Rf7 16. Rae1 {1-0 (75) Dubov,D (2703)-Rakhmanov,A (2634) Sochi 2018}) 7. cxd5 Nxd5 8. Bxg7 Kxg7 {LiveBook: 7 Games. White is slightly better.} 9. O-O e5 10. d4 $146 ({Predecessor:} 10. d3 Be6 11. Qd2 f6 12. Qb2 Nb6 13. Nbd2 Bd5 14. Rac1 {1-0 (63) Sedlacek,P (2234)-Koutny,P (2177) Slovakia 2017}) 10... exd4 11. Nxd4 Qf6 12. Nxc6 (12. Nc2 $5 {[%cal Rd1d5]} Nde7 13. Nd2 $11) 12... Qxa1 13. Qxd5 bxc6 14. Qxc6 {[%mdl 64] Double Attack} Bf5 $36 {[%mdl 2048] Black fights for an advantage.} 15. Nc3 {[%cal Bb1c3,Bc3d5,Bd5f4][%mdl 32]} Qb2 16. h3 (16. Qxc7 $2 Rac8 $19) 16... h5 17. Nd5 ({But not} 17. Qxc7 $2 Rac8 $19) 17... Rae8 18. Nf4 Qe5 19. Rc1 Re7 (19... h4 $5) 20. e3 (20. Rc5 $11 {keeps the balance.} Qd6 21. Qb5) 20... Rd8 $17 21. Rc5 Qb2 $1 {White must now prevent ...Rd1+.} 22. Kh2 $2 (22. Nd5 $17 {is a better defense.} Red7 23. e4) 22... Rd6 $19 (22... Qxa2 23. Rxf5 $1 {[%mdl 512]} Rd6 24. Qc3+ f6 25. Rg5 $18) 23. Qa8 {intending Nxh5+.} Qxf2 24. Rxf5 gxf5 25. Nxh5+ Kg6 26. Qh8 f6 (26... Re4 $1 $17 27. Nf4+ Rxf4 $1 {[%mdl 512]} 28. exf4 Qxa2) 27. Nf4+ $11 Kf7 28. Qh5+ Kg8 29. Qg6+ Kf8 30. Qxf5 Ke8 31. Qg6+ Kd8 {[#]} 32. e4 (32. Nd5 $1 $11 {[%mdl 512] was the only way to keep the balance.}) 32... c6 $17 ({Resist} 32... Qxa2 33. Nd5 $15) 33. h4 Qxa2 34. Qg8+ Kc7 35. Qc4 Kd8 $2 ({Better is} 35... Rd2 $19 {aiming for ...Rc2.} 36. e5 Rc2) 36. Qb4 Kc7 $2 (36... Rd2 $11) 37. Qc4 $1 $19 Kc8 38. Qb4 (38. Nd5 $17 Red7 39. Qc5) 38... Qd2 39. Qc5 Qd4 40. Qf5+ Kb7 41. Ng6 Rg7 42. h5 (42. e5 $142 fxe5 43. Nxe5) 42... Qe3 43. b4 Qg5 (43... Rd3 $142 44. Qf4 Qe2) 44. Qh3 $2 (44. Qxg5 fxg5 45. Kh3) 44... Rh7 {Black is clearly winning.} 45. Nf4 Rd1 46. Bf3 Rd2+ 47. Bg2 Rb2 48. Kg1 Rxb4 49. Bf3 Rb2 {( -> ...Qc5+)} 50. Kh1 Qc5 {Accuracy: White = 36%, Black = 77%.} 0-1

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Bai, Jinshi"]
[Black "Negi, Parimarjan"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2572"]
[BlackElo "2656"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,73,50,45,54,45,65,87,97,124,109,113,126,149,149,147,108,173,174,172,173,173,175,168,167,166,166,199,197,213,217,187,174,222,211,201,222,271,271,269,261,269,266,261,263,348,348,421,421,421,377]} 1. Nf3 Nf6 2. c4 e6 3. g3 b6 4. Bg2 Bb7 5. O-O Be7 6. b3 O-O 7. Bb2 c5 8. d4 cxd4 9. Qxd4 Nc6 {A30: Symmetrical English: Double Fianchetto and Hedgehog} 10. Qf4 Rc8 (10... d5 11. Rd1 Qb8 12. Ne5 Bd6 13. Nxc6 Bxc6 14. Qh4 Be7 15. Nc3 Qb7 16. cxd5 Nxd5 17. Qc4 b5 18. Qd3 Rfd8 19. Nxd5 Bxd5 20. Bxd5 Rxd5 {½-½ (33) Melkumyan,H (2640)-Inarkiev,E (2730) Izmir 2016}) 11. Rd1 $146 ({Predecessor:} 11. Nc3 a6 12. e4 d6 13. Rfd1 Qc7 14. Rac1 Qb8 15. Qe3 Ba8 16. Qe2 Rfd8 17. Nd4 Nxd4 18. Rxd4 {½-½ (25) Tonsingh,O (2200)-Skalli,K Dubai 1986}) 11... Qc7 12. Nc3 a6 13. Qxc7 Rxc7 {LiveBook: 5 Games} 14. Nd5 exd5 15. cxd5 Rcc8 {aiming for ...Nb4.} 16. dxc6 dxc6 17. Ne5 Rc7 {[#]} 18. Nc4 $1 b5 19. Be5 Rcc8 20. Bd6 bxc4 (20... Rce8 $16 {was necessary.}) 21. Bxe7 $18 Rfe8 22. Bxf6 $1 gxf6 23. Rd7 Rb8 24. bxc4 Bc8 25. Rd6 c5 26. e3 ({Don't play} 26. Rxf6 $6 Be6 $16) 26... Kg7 27. Bd5 Rb2 28. h4 Be6 29. Rxa6 Bxd5 30. cxd5 {[%cal Bc4d5,Bd5d6][%mdl 4128] Endgame KRR-KRR} Reb8 31. Rc1 Rd2 32. Rc4 ({Weaker is} 32. Rxc5 Rbb2 $14) 32... f5 33. d6 (33. Rxc5 Rb1+ 34. Kg2 Rbb2 $14) 33... Rbb2 34. Rf4 ({Not} 34. Rxc5 Rxf2 35. Rac6 Rg2+ 36. Kf1 Rh2 $11) 34... Rd5 35. a4 Rb4 36. Rxb4 cxb4 37. Rb6 {Accuracy: White = 98%, Black = 53%.} 1-0

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Ramirez, Alejandro"]
[Black "Xiong, Jeffery"]
[Result "1/2-1/2"]
[ECO "D79"]
[WhiteElo "2567"]
[BlackElo "2672"]
[Annotator "TA"]
[PlyCount "43"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,43,20,27,13,18,0,33,31,27,35,26,14,26,0,39,0,18,0,143,-60]} 1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. cxd5 cxd5 6. Nf3 Bg7 7. O-O O-O 8. Nc3 b6 9. Bf4 Bb7 10. Rc1 Nc6 11. Ne5 Rc8 {D79: Fianchetto Grünfeld: Symmetrical Variation (6 0-0 c6 7 cxd5 cxd5)} 12. Qa4 (12. Nxc6 Bxc6 13. Be5 Qd7 14. e3 Rfd8 {½-½ (14) Bruzon Batista,L (2677)-Yu,Y (2715) Havana 2015}) 12... a6 13. Nxc6 Rxc6 {LiveBook: 5 Games. The position is equal.} 14. Qb3 e6 15. Na4 {[#]} Nd7 $146 ({Predecessor:} 15... b5 16. Nc5 Ba8 17. a4 bxa4 18. Qxa4 Qc8 19. Be5 {½-½ (67) Danielian,E (2488)-Ju,W (2557) Chengdu 2015}) 16. Rxc6 Bxc6 17. Rc1 Bb5 18. Nc3 Bc6 19. Na4 Bb5 20. Nc3 Bc6 $1 21. Na4 Bb7 (21... Bb5 $11 {remains equal.}) 22. Nc3 $2 ({Better is} 22. Rc7 $16 e5 23. Bxe5 (23. Rxb7 exf4 24. Qxd5 Nf6 $16) 23... Nxe5 24. Rxb7) 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Stukopin, Andrey"]
[Black "Sevian, Samuel"]
[Result "1/2-1/2"]
[ECO "C49"]
[WhiteElo "2565"]
[BlackElo "2647"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,63,15,4,62,71,62,41,35,33,45,0,6,19,18,0,0,0,17,5,23,22,25,23,28,18,38,16,16,17,102,16,15,20,16,17,10,24,27,15,37,0,0,-27]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6 7. Ne2 Ne7 8. c3 Ba5 9. Ng3 c6 10. Ba4 Ng6 11. d4 Re8 12. Bc2 {LiveBook: 33 Games. C49: Four Knights: 4 Bb5 Bb4} d5 ({Black should play} 12... Bb6 $11) (12... h6 13. h3 Bc7 14. Re1 d5 15. Nxe5 Nxe5 16. dxe5 Nxe4 17. Nxe4 dxe4 18. Qxd8 Rxd8 19. Bxe4 Bxe5 {½-½ (31) Adhiban,B (2668)-Aronian,L (2780) Douglas 2018}) 13. Bg5 $14 exd4 {[#]} 14. Qxd4 $146 {White is slightly better.} ({Predecessor:} 14. cxd4 dxe4 15. Nxe4 Bf5 16. Nc5 Bc8 17. Qd3 Qd6 18. Bxf6 Qxf6 19. Ne5 Bb6 {1-0 (36) Ter Sahakyan,S (2577)-Davtyan,A (2303) Yerevan 2017}) 14... Bb6 15. Bxf6 Qd6 16. Qd3 {[#] Bd4 is the strong threat.} Qxf6 17. exd5 Bg4 18. Nd4 cxd5 19. Rae1 Bd7 20. Ngf5 Rxe1 21. Rxe1 {And now Ne7+! would win.} Re8 22. Rxe8+ Bxe8 23. Ne3 Bc6 24. g3 Nf8 25. b4 a6 (25... Bxd4 $11 {keeps the balance.} 26. cxd4 a6) 26. a4 (26. Nxc6 $16 Bxe3 27. Qxe3 Qxc6 28. Qd3) 26... Bxd4 $1 $11 27. cxd4 Qd6 28. b5 axb5 29. axb5 Bd7 30. Bb3 Be6 31. f4 g6 32. Qc3 {Accuracy: White = 48%, Black = 61%.} 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Ali Marandi, Cemil Can"]
[Black "Naroditsky, Daniel"]
[Result "1/2-1/2"]
[WhiteElo "2530"]
[BlackElo "2616"]
[Annotator "TA"]
[PlyCount "14"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,14,-6,-12,5]} 1. Nf3 d5 2. d4 Nf6 3. Bf4 e6 4. e3 Bd6 5. Bg3 O-O 6. Nbd2 b6 7. c3 {LiveBook: 30 Games. D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} a5 $146 ({Predecessor:} 7... Ba6 8. Bxa6 Nxa6 9. Ne5 Nb8 10. f4 c5 11. Bh4 Be7 12. O-O Nfd7 13. Bxe7 Qxe7 14. Rf3 Nxe5 15. fxe5 {1-0 (29) Aronian,L (2767)-Giri,A (2782) chess.com INT 2018}) 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Ringoir, Tanguy"]
[Black "Gabuzyan, Hovhannes"]
[Result "0-1"]
[ECO "E70"]
[WhiteElo "2516"]
[BlackElo "2605"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,78,18,26,45,52,68,56,54,47,51,48,53,36,39,0,37,35,33,43,54,31,37,29,37,41,18,8,8,-12,-10,-11,-17,-20,-13,-13,-18,-32,-29,-28,-35,-78,-63,-83,-73,-84,-80,-67,-61,-127,-127,-112,-120,-223,-218,-224,-213,-220,-218,-205,-212,-497,-444,-596,-578,-541,-573]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Bd3 O-O 6. Nge2 Nbd7 7. Ng3 e5 8. d5 {LiveBook: 7 Games} h5 $146 {E70: King's Indian: Miscellaneous lines with 4 e4, including 5 Nge2 and 5 Bd3 0-0 6 Nge2} ({Predecessor:} 8... Nc5 9. Bc2 a5 10. Rb1 Bd7 11. b3 Qe8 12. h3 b6 13. O-O Kh8 14. Be3 Ng8 15. Qd2 Qe7 16. a3 {½-½ (61) Pinter,J (2546)-Kostic,V (2424) Austria 2012}) 9. Bg5 a5 10. O-O c6 {White is slightly better.} 11. a3 Nc5 12. Bc2 cxd5 13. cxd5 Bd7 14. Kh1 Qb6 15. Rb1 a4 16. f3 Rfc8 17. Be3 Qa5 18. Nge2 Be8 19. Nc1 Nfd7 {[%cal Bf6d7,Bd7b6,Bb6c4,Bc4d2][%mdl 32]} 20. Nd3 Nxd3 21. Qxd3 Nb6 22. Bd2 Nc4 23. Be1 Qb6 24. Qe2 Qe3 {Strongly threatening ...Qxe2.} 25. Bd3 Qxe2 26. Nxe2 Bh6 27. Bb4 Nd2 28. Bxd6 f6 29. Bb4 Nxb1 30. Rxb1 Bf8 31. Bxf8 (31. Bc3 $15) 31... Kxf8 $17 32. Kg1 b5 33. Nc1 {[#]} (33. b4 $17 {keeps fighting.}) 33... b4 $1 $19 {[%mdl 512]} 34. axb4 {[#]} Rab8 $1 35. Na2 Bb5 36. Bxb5 Rxb5 37. Kf2 $2 (37. Rf1) 37... Rc2+ {Black is clearly winning.} 38. Ke3 Rxg2 39. Kd3 Rb8 {Accuracy: White = 40%, Black = 67%.} 0-1

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Macieja, Bartlomiej"]
[Black "Dragun, Kamil"]
[Result "0-1"]
[ECO "E90"]
[WhiteElo "2509"]
[BlackElo "2578"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,62,72,79,66,31,67,75,76,68,81,73,81,67,79,66,77,70,104,14,12,-29,-35,-46,-36,-51,15,-2,-16,-9,0,-39,82,-116,-118,-242,-233,-254,-231,-1644,-1611,-1986,-1853,-1719,-1602,-1462,-1496,-2168,-1934]} 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. d4 O-O 6. h3 Na6 7. Bg5 Qe8 8. g4 c5 {E90: King's Indian: Classical: Early deviations and 6 h3} 9. Qd2 {LiveBook: 12 Games} Nb4 (9... b6 10. Rd1 cxd4 11. Nxd4 Bb7 12. f3 Nc5 13. Bh6 a6 14. Be2 Rd8 15. h4 e5 16. Nf5 Bxh6 17. Qxh6 Ne6 18. Nd5 Nxd5 19. cxd5 gxf5 20. gxf5 Kh8 21. Qf6+ Ng7 22. Rg1 Rg8 23. h5 {1-0 (23) Nepomniachtchi,I (2717)-Ponomariov,R (2756) Riga 2013}) 10. Be2 cxd4 {White is slightly better.} 11. Nxd4 Nc6 {Strongly threatening ...Nxe4!} 12. Be3 $146 Nxd4 13. Bxd4 Be6 14. g5 Nd7 $1 15. Bxg7 Kxg7 16. h4 f6 {[#]} 17. gxf6+ (17. f4 $1 $16) 17... Nxf6 $11 18. h5 Nxh5 19. Bxh5 gxh5 20. Qd4+ Rf6 (20... Kg8 $1 $15) 21. e5 dxe5 22. Qxe5 Bg4 23. Nd5 Qf7 (23... Qg6 $15 {stays ahead.}) 24. Kd2 $2 (24. O-O $16 {and life is bright.}) 24... Qe6 $17 25. Qd4 (25. Qxe6 $17 {might work better.} Rxe6 26. Nf4) 25... Qe2+ $19 {[%mdl 64] Double Attack} 26. Kc3 e5 $40 {[%mdl 128] Black wants a kill.} ({Worse is} 26... Qxf2 27. Nxf6 Qxd4+ 28. Kxd4 $11) 27. Qc5 $2 (27. Qd3 Rf3 28. Ne3 Rxf2 29. Qxe2 Bxe2 30. Rag1+ Kf7 31. Rg5) 27... Rxf2 {Black is clearly winning.} 28. Rab1 Rc8 {[%cal Ba8c8,Bc8c5,Bc5d5][%mdl 32]} 29. Qb5 b6 {( -> ...Rf3+)} 30. Kb4 Rc5 31. Qa6 {[#]} Rxd5 $1 {Accuracy: White = 34%, Black = 49%.} 0-1

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Shetty, Atulya"]
[Black "Brown, Michael William"]
[Result "1/2-1/2"]
[ECO "A20"]
[WhiteElo "2401"]
[BlackElo "2524"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,69,0,17,12,35,45,43,38,35,27,26,29,50,50,45,35,47,39,79,27,28,29,44,46,57,58,71,62,57,23,75,15,101,93,91,95,95,100,100,75,96,96,102,59,82,0,104,0,79,57,74,0]} 1. c4 e5 2. g3 Nf6 3. Bg2 c6 4. d4 exd4 5. Qxd4 Na6 6. Nf3 {A20: English Opening: 1...e5} Bc5 7. Qe5+ Be7 8. O-O O-O 9. Nc3 Re8 (9... Nc7 10. Rd1 Re8 11. Qa5 d5 12. e4 b6 13. Qa4 {0-1 (63) Fedoseev,V (2707)-Inarkiev,E (2690) Satka 2018}) 10. Qd4 Bc5 {LiveBook: 5 Games} 11. Qd3 d5 (11... Bb4 {feels hotter.} 12. Nd4 Nc5 13. Qc2 d6 14. a3 Bxc3 15. Qxc3 Nce4) 12. cxd5 Nxd5 $146 ({Predecessor:} 12... cxd5 13. Rd1 {0-1 (32) Dreux,V (1907)-Naudion,G (2051) Avoine 2011}) 13. Nxd5 Qxd5 14. Qxd5 cxd5 15. e3 $1 Bf5 16. Bd2 Rac8 17. Bc3 Be4 18. Rfd1 Nb4 19. Rd2 (19. Nd2 $16) 19... Nc2 20. Rad1 Nxe3 21. fxe3 Bxe3+ {[%mdl 64] [#] Double Attack} 22. Kf1 {Black must now prevent Re2.} Bxd2 23. Rxd2 f6 24. Nd4 {[%mdl 1024] White has compensation.} Rcd8 (24... Bxg2+ $11 25. Kxg2 b6) 25. Kf2 (25. Bh3 $16) 25... Rd7 (25... Bxg2 $11 26. Kxg2 Kf7) 26. Bh3 $16 f5 27. Bf1 a6 28. Nf3 h6 29. h4 g6 30. Ne5 Rd6 31. Nc4 Rd7 32. Ne5 Rd6 $1 33. Nc4 Rd7 $1 34. Ne3 Kf7 35. Nc4 {Accuracy: White = 54%, Black = 28%.} (35. Bc4 $16) 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.03"]
[Round "4"]
[White "Li, Zhaozhi"]
[Black "Karthik Venkataraman"]
[Result "0-1"]
[ECO "D83"]
[WhiteElo "2395"]
[BlackElo "2515"]
[Annotator "TA"]
[PlyCount "128"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,128,20,22,0,16,0,42,0,25,12,8,14,14,8,8,11,17,0,38,21,32,-9,30,24,27,-75,-79,-195,-178,-529,-529,-465,-496,-791,-766,-694,-374,-362,-342,-394,-377,-385,-380,-410,-407,-545,-247,-280,-138,-124,-131,-136,-146,-123,-57,-57,-58,-59,-60,-60,-40,-39,-47,-64,-52,-139,0,-9,-9,-8,-8,-9,0,-157,-160,-143,-151,-267,-268,-321,-316,-315,-314,-316,-316,-6203,-5306,-29975,-29976,-29976,-29977,-29977,0,0,0,0,0,0,0,-29976,-29977,-29977,0,-346,0,0,0,-29977,-29978,-29985,-29986,-29986,-29987]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 O-O 6. Rc1 Be6 {D83: Grünfeld: 4 Bf4 Bg7 5 e3 0-0} 7. cxd5 Nxd5 8. Nxd5 Bxd5 9. Bxc7 Qd7 {LiveBook: 5 Games} 10. Bg3 Nc6 11. Ne2 Bxa2 $146 ({Predecessor:} 11... e5 12. dxe5 Nxe5 13. Nc3 Rac8 14. e4 {½-½ (44) Sjugirov,S (2678)-Navara,D (2735) Jerusalem 2015}) 12. Qa4 Bd5 13. Nf4 e5 14. dxe5 Bxe5 15. Rd1 Bxf4 $1 16. Qxf4 {White wants to play e4.} Qe6 17. Bh4 a5 18. Bf6 {Hoping for Rxd5!} Nb4 19. f3 Bb3 20. Rd6 Nd5 21. Rxd5 (21. Rxe6 $11 Nxf4 22. Rb6) 21... Bxd5 $17 22. e4 (22. Bb5 $17) 22... Rfc8 $1 $19 23. Bb5 $2 (23. h4) 23... Qb6 24. exd5 Qxb5 25. Kf2 (25. Qd2 $142 Qc5 26. Bd4 Qxd5 27. O-O) 25... Rc2+ 26. Kg3 Qxd5 27. Bc3 Qc5 28. Bd4 Qc7 29. Be5 Qb6 30. Bd4 Qe6 31. Bc3 Rc8 (31... Qe2 $142 32. Kh4 Qxg2) 32. Re1 Re2 (32... Qb6 $19 {has better winning chances. Threatens to win with ...Qf2+.} 33. Bd4 Qc7) 33. Rxe2 $17 Qxe2 34. Qf6 {[%csl Gc3][%cal Rf6h8] [#]} Rxc3 $1 35. Qxc3 {[%mdl 4096] Endgame KQ-KQ} (35. bxc3 Qe1+) 35... b5 (35... h5 $17 36. Qc8+ Kg7 37. Qc3+ Kh7) 36. Qc8+ $15 Kg7 37. Qc3+ Kh6 38. h4 Qe7 39. Kh3 b4 40. Qh8 a4 {And now ...a3 would win.} 41. g4 ({White should play} 41. Qg8 $15) 41... f6 (41... g5 $1 $17 42. hxg5+ Kxg5 43. Qxh7 Qf6) 42. Qa8 $1 $11 a3 43. bxa3 bxa3 44. Qg8 $1 f5 {White should prevent ...fxg4+.} 45. gxf5 $2 ({White should try} 45. Qb3 $11) 45... gxf5 $17 46. Qd5 Kg6 47. h5+ (47. Qc4 $17) 47... Kg5 $19 ({But not} 47... Kxh5 48. Qxf5+ Kh6 49. Qf4+ Kg6 50. Qg4+ Qg5 51. Qe6+ Qf6 52. Qg8+ Kh6 53. Qd5 $19) 48. Qd2+ Kxh5 {( -> ...Qh4+)} 49. Qf4 Kg6 {Strongly threatening ...a2.} 50. Qg3+ Kf7 {White must now prevent ...a2.} 51. Qf4 $2 (51. f4) 51... a2 52. Qxf5+ Qf6 53. Qd7+ Kg6 54. Qe8+ Kh6 $2 (54... Qf7 $1 55. Qc6+ Kg7 56. Qa8 Qe6+ 57. Kg2 Qe2+ 58. Kh3 Qf1+ 59. Kh2 a1=Q 60. Qb7+ Kf6 61. Qc6+ Ke5 62. Qe4+ Kd6 63. Qb4+ Ke6 64. Qg4+ Kd6 65. Qb4+ Kc6 66. Qe4+ Kc5 67. Qe7+ Kc4 68. Qc7+ Kb3 69. Qb7+ Kc4 70. Qc7+ Kd4 71. Qd8+ Ke3 72. Qg5+ Kxf3 73. Qf5+ Ke2 74. Qe6+ Kd2 75. Qd6+ Qd3 76. Qf4+ Qe3 77. Qb4+ Qac3 78. Qxc3+ Qxc3 79. Kh1 Ke2 80. Kg2 Qg7+ 81. Kh2 Kf3 82. Kh3 Qh6#) 55. Qe3+ $11 Kh5 56. Qe8+ Kh6 (56... Qg6 $5 57. Qe5+ $8 Qg5 58. Qe8+ Qg6 59. Qe5+ Qg5 60. Qe8+ Kh6 61. Qe6+ Qg6 62. Qxa2 Qf6 $11) 57. Qe3+ Kg6 $2 {[%mdl 8192]} (57... Kg7 $11 58. Qa7+ Kh6 59. Qxa2 Qxf3+ 60. Kh2 Qf4+ 61. Kg1 Qc1+ 62. Kg2 Qc6+ 63. Kg1 Qc1+ 64. Kg2 Qc6+ 65. Kg1 Qc1+) 58. Qe8+ $1 Qf7 $1 59. Qc6+ Kg5 $2 {[#]} (59... Kg7 $1 {mates} 60. Qa8 Qe6+ 61. Kg2 Qe2+ 62. Kh3 Qf1+ 63. Kh2 a1=Q 64. Qb7+ Kf6 65. Qc6+ Ke5 66. Qe4+ Kd6 67. Qb4+ Kc6 68. Qe4+ Kc5 69. Qe7+ Kc4 70. Qe6+ Kc3 71. Qe5+ Kd2 72. Qf4+ Ke2 73. Qc4+ Ke3 74. Qe4+ Kf2 75. Qh4+ Kxf3 76. Qh5+ Ke3 77. Qc5+ Qd4 78. Qe7+ Kd2 79. Qg5+ Qff4+ 80. Qxf4+ Qxf4+ 81. Kh3 Ke2 82. Kg2 Qg4+ 83. Kh1 Kf3 84. Kh2 Qg2#) 60. Qc1+ $2 {[%mdl 8192]} (60. f4+ $1 $11 {[%mdl 512]} Kxf4 (60... Qxf4 61. Qg2+) 61. Qc1+ Ke4 62. Qc2+ Ke3 63. Qc3+ Ke4 64. Qc2+ Ke3 65. Qc3+ Ke4 66. Qc2+) 60... Kf5 $2 (60... Qf4 $19 61. Qa3 Qh4+ 62. Kg2 Qc4 63. Qe7+ Kg6 64. Qe8+ Kf5 65. Qh5+ Kf6 66. Qh6+ Ke5 67. Qg5+ Kd6 68. Qf6+ Kc5 69. Qe5+ Kc6 70. Qf6+ Kb5 71. Qe5+ Kc6 72. Qf6+ Kb5 73. Qb2+ Ka4) 61. Qc5+ Kg6 $2 {[%mdl 8192]} (61... Kf6 $11 62. Qd4+ Kg6 63. Qg1+ Kf6 64. Qd4+ Kg6 65. Qg1+ Kf6 66. Qd4+) 62. Qc6+ {[#]} Kg7 $1 {Black mates.} 63. Qc3+ Qf6 64. Qc7+ Kg6 {Precision: White = 46%, Black = 52%.} 0-1

