[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Xiong, Jeffery"]
[Black "Hevia Alejano, Carlos Antonio"]
[Result "1-0"]
[ECO "C18"]
[WhiteElo "2672"]
[BlackElo "2476"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,81,54,38,46,33,31,39,-21,-6,-23,-30,-63,19,32,14,-154,-145,-153,-143,-151,-151,-259,-116,-121,-129,-120,-131,-132,0,0,11,0,0,0,0,2,21,22,30,10,21,22,27,27,212,214,193,208,251,245,283,279,466,466,555,545,545,545,737,733]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 Qc7 8. Bd3 cxd4 9. Ne2 dxc3 10. Qxg7 Rg8 11. Qxh7 Nd7 {C18: French: 3 Nc3 Bb4: Main line: 7 h4 and 7 Qg4} (11... Qxe5 12. Bf4 Qf6 13. h4 Rxg2 14. Kf1 Rg8 15. Rg1 Rh8 16. Bg5 Rxh7 17. Bxf6 Rh6 18. Bg5 Rh8 19. Bf6 Rh6 20. Bg5 Rh8 21. Bf6 {½-½ (21) Leko,P (2728)-Shirov,A (2713) Saratov 2011}) 12. Bf4 Nc5 {LiveBook: 3 Games} 13. O-O Bd7 {White is slightly better.} 14. Bg3 Nxd3 15. cxd3 (15. Qxd3 $14 Nf5 16. Rab1) 15... c2 $146 ({Predecessor:} 15... Rc8 16. Rfc1 c2 17. Bf4 Ba4 18. h3 Rg6 19. h4 {1-0 (38) Diaz,J (2410)-Sjodahl,P (2325) Andorra 1990}) 16. Rac1 Ba4 17. Nf4 {aiming for Nxd5!} Qxe5 (17... Rf8 $15) 18. Nxe6 $1 Rxg3 $1 19. Rfe1 $2 (19. fxg3 fxe6 20. Rce1 Qb2 $17) (19. Qh4 $1 $11 d4 20. Rce1 (20. hxg3 fxe6 21. Rfe1 Qg7 $11) 20... Rxg2+ 21. Kxg2 Qd5+ 22. f3 fxe6 23. Qh8+ Kd7 24. Qxa8) 19... Qf6 $17 20. Nc7+ Kd8 21. Nxa8 Rg8 22. Qh3 (22. Rxe7 $2 Qg5 $19) (22. Qh5 $17) 22... Qf5 (22... Nc6 $1 $19 {and Black stays clearly on top.} 23. Qh5 Kc8 24. Qxd5 Kb8) 23. Qh4 Qg5 24. Qxg5 Rxg5 25. f4 Rg8 (25... Rg6 $1 $17 26. Nc7 Rc6 27. Rxe7 Kxe7 28. Nxd5+ Ke6) 26. Nc7 $1 $11 Kd7 {White should prevent ...Rc8.} 27. Rxe7+ Kxe7 28. Nxd5+ {[%mdl 4096] Endgame KRB-KRN} Kd6 29. Ne3 Rc8 30. Kf2 Rc3 31. Ke2 {Strongly threatening Kd2.} b5 32. h4 {[%cal Bh2h4,Bh4h5,Bh5h6][%mdl 32]} Rxa3 33. h5 Rc3 $2 (33... Ke7 $1 $11) 34. Kd2 $1 $18 {[%cal Rd2c3]} Rc8 {[#]} 35. g4 $1 (35. Nxc2 $6 Bxc2 36. Rxc2 Rh8 $16) 35... Rh8 {[#]} 36. h6 $1 ({Not} 36. Nxc2 f5 $14) 36... b4 37. Ra1 ({Inferior is} 37. Nxc2 Rxh6 38. Nxb4 Rh2+ 39. Kc3 a5 $11) 37... Bd7 $2 (37... Bb5 {keeps fighting.} 38. Kxc2 Kc5) 38. Kxc2 {White is clearly winning.} f6 39. Ra6+ Kc5 40. Rxa7 Be6 41. Ra6 {Precision: White = 55%, Black = 27%.} 1-0

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Sevian, Samuel"]
[Black "Boros, Denes"]
[Result "1/2-1/2"]
[ECO "B03"]
[WhiteElo "2647"]
[BlackElo "2442"]
[Annotator "TA"]
[PlyCount "92"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,92,39,40,42,47,39,44,35,36,39,54,48,53,53,53,53,60,55,47,44,42,40,48,33,54,60,45,49,47,62,70,30,27,20,24,24,32,20,20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 Bf5 6. Nc3 e6 7. Nf3 Be7 8. Be2 dxe5 9. fxe5 O-O 10. O-O Nc6 11. Be3 f6 12. exf6 Bxf6 13. Qd2 Qe7 14. Rad1 Rad8 15. Qc1 e5 {B03: Alekhine's Defence: Four Pawns Attack} 16. d5 Nd4 $1 {LiveBook: 4 Games} 17. Bxd4 exd4 {White is slightly better.} 18. Nxd4 Bg5 19. Qa1 $1 (19. Nxf5 Qc5+ 20. Kh1 Bxc1 21. Rxc1 Rde8 22. b3 Nc8 23. h3 {0-1 (39) Ladron de Guevara Pinto,P (2424)-Del Rio de Angelis,S (2525) Linares 2018}) 19... Be3+ $146 ({Predecessor:} 19... Bd7 20. Kh1 Bf4 21. g3 Be5 22. Qb1 c5 23. Ne6 Bxe6 24. dxe6 Bxc3 25. Rxf8+ Rxf8 26. bxc3 Qxe6 {½-½ (33) Conil,P-Cattoni,M France 1988}) 20. Kh1 Bxd4 21. Rxd4 Na4 22. Nxa4 Qxe2 23. Nc3 Qe3 24. Rdd1 $1 Bd3 25. Rfe1 Qd4 26. b3 Rf2 27. Ne4 Qxa1 28. Rxa1 Bxe4 $1 29. Rxe4 $14 {[%mdl 4096] Endgame KRR-KRR} c6 30. Kg1 Rc2 31. dxc6 bxc6 32. Rg4 Rdd2 33. a4 Rb2 34. Rg3 h5 {The position is equal.} 35. Re1 h4 36. Rg4 h3 37. gxh3 Rxb3 38. Rg2 Rxg2+ 39. Kxg2 $11 {KR-KR} Rb4 40. Re8+ Kh7 41. c5 Rc4 42. Re5 a5 43. h4 Rxa4 44. Re6 Rg4+ 45. Kh3 Rg6 46. Re7 Rf6 {Accuracy: White = 92%, Black = 83%.} 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Naroditsky, Daniel"]
[Black "Hong, Andrew"]
[Result "1-0"]
[ECO "D00"]
[WhiteElo "2616"]
[BlackElo "2390"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,101,-2,-10,0,-23,6,0,0,6,7,0,4,-14,-17,-59,-58,-58,-40,-71,-71,-71,-34,-81,-78,-89,-74,-77,-57,-78,-61,-60,-48,-66,-29,-37,0,0,0,0,0,0,0,0,0,-13,-3,-10,-8,-15,-15,-13,14,-65,-25,-22,-25,-47,0,0,0,0,156,145,158,72,100,72,67,72,159,154,169,162,366,429,458,441,29976,29977,29986,29987,29988,29989,29989,29990,29990,29991,29996,29997,29997,29998,29998,29999]} 1. d4 d5 2. Nc3 Nf6 3. Bf4 e6 4. Nb5 Bb4+ (4... Na6 5. e3 Be7 6. Nf3 O-O 7. Be2 c6 8. Nc3 c5 9. h3 Bd7 10. O-O Rc8 11. a4 Nb4 {0-1 (24) Alekseenko,K (2639)-Oparin,G (2624) Sochi 2018}) 5. c3 Ba5 6. e3 {LiveBook: 4 Games. D00: 1 d4 d5: Unusual lines} O-O 7. Bd3 c6 (7... a6 $5 {[%cal Ra6b5]} 8. Na3 Bb6 $11) 8. Nd6 $146 {The position is equal.} ({Predecessor:} 8. Na3 Nbd7 9. Nf3 Bc7 10. Qe2 Re8 11. O-O-O a5 {½-½ (55) Pasiev,R (2384)-Shandrygin,N (2169) Sochi 2015}) 8... Bc7 9. Nxc8 Qxc8 10. Bg5 {Bxf6 is the strong threat.} Nbd7 {[%cal Bb8d7,Bd7f6,Bf6e4][%mdl 32]} 11. Qf3 Re8 12. g4 e5 $36 {[%mdl 2048] White must now prevent ...e4. Black fights for an advantage.} 13. Bxf6 Nxf6 14. Bf5 Qd8 15. dxe5 Bxe5 16. Ne2 Ne4 17. Ng3 Nd6 18. Bd3 b5 19. Rd1 Nc4 20. Bxc4 bxc4 21. O-O Rb8 22. e4 Qf6 (22... dxe4 {seems wilder.} 23. Qxe4 Qf6 24. Qxc4 Rxb2 25. Rd7 a6) 23. Qxf6 Bxf6 24. exd5 cxd5 25. Rd2 g6 26. Rfd1 Re6 27. f4 {[%cal Bf2f4,Bf4f5][%mdl 32]} Be7 28. f5 Reb6 29. Rxd5 Rxb2 30. Ne4 Rxa2 31. Rd7 (31. f6 $1 $11 Bf8 32. Rd8) 31... Bf8 32. Rd8 $1 {[%cal Rd8b8]} Rab2 33. R1d4 Rxd8 34. Rxd8 $15 {[%mdl 4096] Endgame KRB-KRN} Rb5 35. h4 Kg7 $2 (35... gxf5 $11 36. Nf6+ Kg7 37. Nh5+ Kg8 38. Nf6+ Kg7 39. Nh5+ Kg8 40. Nf6+) 36. f6+ $16 {[%mdl 1024] White has strong compensation.} Kg8 {[#]} 37. Kg2 (37. Kf2 $142 $1) 37... a5 38. Ra8 h6 39. Kf3 Rd5 (39... g5 $142) 40. Kf4 Rb5 {[#]} 41. Nd2 $1 Rb6 $2 (41... g5+ 42. hxg5 hxg5+ 43. Ke3 Re5+ 44. Kd4 {[%mdl 64] Double Attack} Re2 45. Nxc4 Re6) 42. g5 $18 ({And not} 42. Nxc4 Rxf6+ 43. Ke4 Rf2 $11) 42... hxg5+ 43. hxg5 Rc6 (43... a4 $18 44. Nxc4 (44. Rxa4 Bd6+ 45. Ke4 Rb8 $16) 44... Rb7) 44. Nf3 {White mates.} a4 45. Ne5 Rd6 46. Ng4 a3 47. Nh6+ Kh7 48. Rxf8 a2 49. Nxf7 {[%csl Gf7][%cal Rf8h8]} Rxf6+ 50. gxf6 {[%csl Gf7][%cal Rf8h8]} g5+ 51. Kxg5 {Accuracy: White = 56%, Black = 30%.} 1-0

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Gabuzyan, Hovhannes"]
[Black "Bai, Jinshi"]
[Result "1/2-1/2"]
[ECO "A49"]
[WhiteElo "2605"]
[BlackElo "2572"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,117,9,23,53,41,41,37,39,35,43,50,61,51,51,51,52,51,58,17,50,0,0,0,0,0,43,-45,-2,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,8,8,8,8,8,8,8,8,8,8,8,8,8]} 1. Nf3 Nf6 2. b3 g6 3. Bb2 Bg7 4. g3 c5 5. Bg2 d6 6. d4 cxd4 7. Nxd4 d5 8. O-O O-O 9. c4 dxc4 10. bxc4 Nc6 {A49: 1 d4 Nf6 2 Nf3 g6 3 g3: Anti-King's Indian systems} 11. Nxc6 bxc6 12. Nd2 {[%cal Bb1d2,Bd2b3,Bb3d4][%mdl 32] LiveBook: 4 Games} Qa5 $146 {White has an edge.} ({Predecessor:} 12... Bg4 13. Bxc6 Rc8 14. Bf3 Bxf3 15. exf3 Qd3 16. Rc1 Rfd8 17. Bc3 Bh6 18. f4 {½-½ (28) Shankland,S (2722)-Svidler,P (2756) Hoogeveen 2018}) 13. Nb3 Qh5 {With the idea ...Ng4.} 14. Bxf6 Bxf6 15. Bxc6 Rb8 16. Rc1 Qe5 17. e3 Bf5 18. Nd4 Bh3 19. Re1 Qc5 20. Bd5 Rb2 21. Qf3 h5 22. Nb3 Qb4 23. c5 Bg4 24. Qg2 (24. Qe4 $14 Qxe4 25. Bxe4) 24... Rxa2 (24... e6 $5 {[%cal Re6d5]} 25. h3 Bf5 $15) 25. h3 {[#] Threatens to win with Nd4.The position is equal.} Be6 26. c6 Bxd5 $1 27. Qxd5 {c7 is the strong threat.} e6 28. Qc4 Qxc4 29. Rxc4 Rc8 30. Rd1 Ra6 31. Rd7 ({But not} 31. c7 Kf8 $14) 31... Raxc6 32. Rxc6 Rxc6 33. Rxa7 $11 {[%mdl 4096] Endgame KRB-KRN} Rc2 34. Rd7 Be5 35. Kg2 Kg7 36. Nd2 Rc7 37. Rd3 g5 38. g4 hxg4 39. hxg4 Bf6 40. Ne4 Kg6 41. Ra3 Be7 42. Ra6 Rb7 43. Kf3 Rb2 44. Ra7 Bb4 45. Rb7 Bc3 46. Rc7 Be1 47. Rc6 Ra2 48. Rb6 Rc2 49. Kg2 Rc4 50. Kf3 $1 Rc2 51. Rd6 Ra2 52. Rd1 f5 (52... Bb4 {keeps more tension.} 53. Rd4 Rb2 54. Rc4 Be7 55. Rc7 Bf6) 53. gxf5+ exf5 54. Rxe1 {[#] Hoping for Nc5.} fxe4+ {KR-KR} 55. Kg3 Kf5 56. Rb1 Ra5 57. Rb8 Ra1 58. Rf8+ Kg6 59. Kg2 {Accuracy: White = 78%, Black = 72%.} 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Cordova, Emilio"]
[Black "Bruzon Batista, Lazaro"]
[Result "1/2-1/2"]
[ECO "E08"]
[WhiteElo "2597"]
[BlackElo "2664"]
[Annotator "TA"]
[PlyCount "29"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,29,8,0]} 1. d4 Nf6 2. Nf3 e6 3. c4 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 O-O 7. O-O Nbd7 8. Qc2 c6 9. Rd1 b6 10. Bf4 Bb7 11. Ne5 Nh5 $146 ({Predecessor:} 11... Rc8 12. Nc3 Nh5 13. Bc1 Nhf6 14. e4 Bb4 15. Bg5 Qc7 16. Nxd7 Nxd7 17. a3 Bxc3 18. Qxc3 dxc4 19. Bf4 Qd8 20. Bd6 {0-1 (76) Dominguez Perez,L (2739)-Caruana,F (2822) Saint Louis 2018}) 12. Bd2 Nhf6 13. Bf4 Nh5 14. Bd2 Nhf6 15. Bf4 {LiveBook: 301 Games} 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Dragun, Kamil"]
[Black "Swiercz, Dariusz"]
[Result "1/2-1/2"]
[ECO "D00"]
[WhiteElo "2578"]
[BlackElo "2649"]
[Annotator "TA"]
[PlyCount "165"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,165,-6,-7,0,1,6,4,-2,-14,-16,-47,29,26,31,28,30,32,33,31,25,25,29,31,32,20,29,31,48,48,49,49,49,49,49,48,74,67,85,60,85,85,85,65,85,85,85,85,93,93,93,93,93,93,135,135,135,135,135,135,135,93,135,135,135,93,135,93,93,93,93,93,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,131,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,0,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,135,136,136,135,93,93,93,167,93]} 1. d4 Nf6 2. Bg5 d5 3. Bxf6 exf6 4. e3 c6 5. g3 (5. Bd3 Bd6 6. Nd2 O-O 7. Qf3 a5 8. Ne2 Na6 9. c3 Nc7 10. h4 Re8 11. g4 Ne6 12. O-O-O b5 13. Rdg1 g6 14. h5 Ng5 {½-½ (43) Mamedyarov,S (2809)-Kramnik,V (2800) Moscow 2018}) 5... Bd6 6. Bg2 {D00: 1 d4 d5: Unusual lines} O-O 7. Ne2 f5 8. O-O Be6 9. b3 Nd7 {[%cal Bb8d7,Bd7f6,Bf6e4][%mdl 32]} 10. Qd3 {LiveBook: 4 Games} h5 $146 ({Predecessor:} 10... Nf6 11. c4 Qd7 12. Nbc3 Rac8 {1-0 (47) Georgiev,K (2680)-Horvath,A (2495) Fuegen 2006}) 11. h4 Nf6 12. c4 Ne4 13. c5 Bc7 14. Nd2 g5 (14... f6 $15) 15. hxg5 $11 Qxg5 16. Nf4 Kh8 17. Qe2 Nxd2 18. Qxd2 h4 19. Bf3 Kg7 20. Kg2 Rh8 21. Rh1 hxg3 22. fxg3 Rxh1 23. Rxh1 Rh8 24. Rxh8 Kxh8 25. b4 a6 26. a4 {[%cal Ba2a4,Ba4b5,Bb5b6][%mdl 32]} Qd8 27. Qb2 Kg7 28. b5 axb5 29. axb5 Qa8 30. b6 Bd8 31. Be2 Bg5 32. Qb1 Qa3 33. Kf2 Qa8 34. Qh1 Bxf4 35. gxf4 Qh8 36. Qg1+ Kf8 37. Ke1 Ke7 38. Kd2 Qa8 39. Qg5+ Kd7 40. Ke1 Qh8 41. Bf3 Qh3 42. Kf2 Qh2+ 43. Bg2 Qh8 44. Kg3 Qh7 45. Qh4 Qg8+ 46. Kf2 Qg7 47. Qh1 Kd8 48. Qa1 Bc8 49. Qa8 f6 50. Qb8 Qd7 51. Bf3 Ke7 52. Ke2 Kf8 53. Kd2 Ke7 54. Bh5 Qe6 55. Ke2 Qd7 56. Kf2 Kf8 57. Qd6+ Kg7 58. Ke1 Qe6 59. Kd2 Qd7 60. Qb8 Kf8 61. Be2 Ke7 62. Bd3 Qe6 63. Qa8 Kf8 64. Qa1 Qg8 65. Kc3 {[#] Hoping for Bxf5!} Kf7 66. Qa8 {Black must now prevent Bxf5!} Qe8 67. Kd2 Qd7 68. Qa1 Qe8 69. Qb1 Qg8 70. Qa1 ({White should play} 70. Qh1 $16) 70... Qe8 (70... Kf8 $11 {keeps the balance.}) 71. Qh1 $16 Qg8 72. Be2 Ke7 73. Qa1 Kf7 74. Qa7 Qd8 75. Bh5+ Ke7 76. Qb8 Qd7 77. Ke1 Kf8 78. Kf2 Ke7 79. Kg3 Kf8 80. Qd6+ Kg7 81. Kh4 Qe6 82. Qc7+ Qd7 (82... Kh6 $16) 83. Qxd7+ {Accuracy: White = 81%, Black = 67%.} (83. Be8 $18 Qxc7 84. bxc7) 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Karthik Venkataraman"]
[Black "Ynojosa Aponte, Felix Jose"]
[Result "0-1"]
[ECO "B30"]
[WhiteElo "2515"]
[BlackElo "2368"]
[Annotator "TA"]
[PlyCount "132"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,132,44,33,51,37,44,88,93,104,102,120,100,106,53,56,46,79,43,31,18,52,0,14,6,37,0,0,25,11,0,29,44,39,50,38,-18,74,45,20,31,32,21,150,135,154,-247,-246,-232,-217,-283,-295,-273,-274,-323,-329,-341,-321,-382,-375,-375,-370,-311,-319,-362,-380,-489,-488,-548,-541,-665,-665,-665,-657,-642,-647,-798,-756,-868,-859,-1464,-1370,-1603,-2317,-2527,-2475,-1905,-1902,-29970,-29971,-29971,-29972,-29971,-29971,-29972,-29973,-29970,-29975,-29976,-29969,-29968,-29968,-29972,-29970,-29969,-29970,-29968,-29954,-29978,-29979,-29981,-29978,-29978,-29979,-29978,-29978,-29977,-29975]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. O-O Nge7 5. d4 cxd4 6. Nxd4 Nxd4 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6} 7. Qxd4 a6 8. Be2 Nc6 9. Qc3 b5 {LiveBook: 10 Games} 10. a4 b4 11. Qg3 Bb7 12. Bg5 Qb8 $146 ({Predecessor:} 12... Be7 13. Bxe7 Qxe7 14. Qxg7 {1-0 (44) Areshchenko,A (2664)-Krasenkow,M (2636) Baku 2014}) 13. Bf4 $1 {[%cal Rf4b8]} d6 14. Nd2 Ne5 15. Be3 (15. Rfd1 $16) 15... h5 $14 16. f4 h4 17. Qh3 Nd7 18. Bd4 Be7 19. Bd3 (19. Rad1 $14) 19... Bf6 20. Bxf6 Qa7+ 21. Kh1 gxf6 22. Nc4 {[%cal Bd2c4,Bc4e3,Be3f5][%mdl 32]} Ke7 {[%cal Be8e7,Be7f8,Bf8f7][%mdl 32]} 23. Rad1 d5 24. exd5 Bxd5 25. Ne3 $36 {[%mdl 2048] White has the initiative.} Bc6 26. Rfe1 (26. f5 $14 e5 27. Bc4) 26... Qc7 (26... Nc5 $1 $11 {keeps the balance.}) 27. Nf5+ Kf8 28. Nxh4 {aiming for Ng6+!} Rh6 $1 29. Qg4 $1 a5 {[#]} (29... Nc5 $11) 30. Re3 $1 $16 {Rde1 is the strong threat.} Rh8 31. Rxe6 $2 ({Don't take} 31. Rg3 $6 Ke7 $16) (31. Bb5 $16 {stays on course.}) 31... fxe6 $19 {[%cal Bf7e6,Be6f5][%mdl 32]} 32. Ng6+ Kf7 33. Nxh8+ Rxh8 34. Bg6+ {[#]} Ke7 $1 35. Bf5 exf5 36. Qg7+ Ke6 37. Re1+ Be4 {[%mdl 64] Discovered Attack} 38. Qxh8 Qxc2 {[%csl Ge4][%cal Rc2g2][%mdl 64] Double Attack} 39. Qg8+ Kd6 40. b3 Bd5 41. Qg7 Kc6 42. h4 {intending h5.} Qxb3 43. h5 Qh3+ 44. Kg1 Qxh5 45. Qe7 {Black must now prevent Rc1+.} Qf7 46. Rc1+ Kb7 47. Qd6 Nb6 48. Rc5 b3 {[%cal Bb4b3,Bb3b2][%mdl 32]} 49. Rb5 Bc6 50. Rc5 Qe8 51. Qd2 Nxa4 52. Rxa5 b2 {Black mates.} 53. Qb4+ Kc8 54. Rxa4 Bxa4 55. Qxb2 Qe3+ 56. Kh1 Bc6 57. Qa2 Qxf4 58. Qe6+ Kb7 59. Qf7+ Kb6 60. Qb3+ Kc5 61. Qc3+ Qc4 62. Qe3+ Kd6 63. Kh2 Qh4+ 64. Kg1 Qe4 {[%csl Gc6][%cal Re4g2]} 65. Qa3+ Kd7 {[%csl Gc6][%cal Re4g2]} 66. Qa7+ Bb7 {Accuracy: White = 40%, Black = 71%.} 0-1

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Escalante Ramirez, Brian Sebasti"]
[Black "Quesada Perez, Yuniesky"]
[Result "1/2-1/2"]
[ECO "B30"]
[WhiteElo "2446"]
[BlackElo "2642"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,85,0,0,26,0,18,19,14,14,17,-13,-15,-17,-11,-13,-12,-16,-3,-15,-3,-15,0,0,0,-23,-15,-16,-16,-15,-6,-12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nc3 Nc6 3. Bb5 Nd4 4. Bc4 a6 5. a4 e6 6. Nge2 Nf6 7. O-O Nxe4 8. Nxe4 d5 9. Nxd4 cxd4 10. Bd3 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6} dxe4 11. Bxe4 {LiveBook: 7 Games} Be7 (11... Bd6 12. d3 f5 13. Bf3 O-O 14. Bd2 Qc7 15. h3 Bd7 16. Re1 Kh8 17. c4 a5 {0-1 (57) Tissir,M (2381)-Jumabayev,R (2612) Riadh 2017}) 12. c4 $146 {White has an edge.} ({Predecessor:} 12. d3 O-O 13. c3 dxc3 14. bxc3 Qc7 15. Qb3 Rb8 16. c4 Bf6 17. Rb1 Bd7 {½-½ (41) Simonian,H (2469)-Szabo,B (2317) Budapest 2012}) 12... Qc7 13. d3 O-O 14. g3 Bd7 15. f4 Bc6 16. Bf3 a5 17. b3 Rfe8 18. Ra2 Bb4 19. g4 Rad8 20. Rg2 e5 21. fxe5 Qxe5 22. Bxc6 bxc6 23. Qf3 {The position is equal.} Qe6 24. h4 {[%cal Bh2h4,Bh4h5][%mdl 32]} Rd7 25. h5 Rde7 26. g5 Qd7 27. h6 Re1 {[#] ...Rxf1+ is the strong threat.} 28. Rgf2 {[%cal Rf3f7]} Rxf1+ 29. Rxf1 gxh6 30. gxh6 {Threatening mate with Qg3+.} Re6 31. Rf2 Rg6+ 32. Rg2 Qe6 33. Bf4 Qf5 {[#] aiming for ...Bd6!} 34. Kf2 Qe6 {[%csl Gb4][%cal Re6e1]} 35. Qe4 Qxe4 36. dxe4 $11 {[%mdl 4096] Endgame KRB-KRB} f6 37. Rg3 Kf7 38. Ke2 c5 39. Rxg6 Kxg6 40. Kd3 Kh5 41. Ke2 Kg6 42. Kd3 Kh5 43. Ke2 {Accuracy: White = 77%, Black = 61%.} 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Katz, Alexander"]
[Black "Le, Quang Liem"]
[Result "1/2-1/2"]
[ECO "B59"]
[WhiteElo "2433"]
[BlackElo "2714"]
[Annotator "TA"]
[PlyCount "122"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,122,0,0,-17,-8,-17,-18,2,0,37,-17,-26,-35,-13,-69,-65,-62,-60,-68,-60,-114,-48,-33,-31,-43,-38,-57,-66,-72,-61,-70,-63,-59,-14,-87,-4,-6,-22,-13,24,0,47,0,0,0,0,0,0,0,0,-55,-39,-50,-20,-39,-12,-74,33,-61,-50,-78,-22,-20,-6,-44,11,11,11,-41,-6,-15,-15,-21,-20,-23,0,0,0,0,0,-15,-14,-19,-11,-15,-11,-28,-22,-22,0,-25,-6,-6,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Be2 e5 7. Nb3 Be7 8. Be3 Be6 9. Qd2 O-O 10. O-O a5 {[%cal Ba7a5,Ba5a4,Ba4a3][%mdl 32]} 11. Rad1 a4 {B59: Classical Sicilian: 6 Be2 e5 7 Nb3} 12. Nc1 a3 13. b3 Rc8 14. Bf3 $146 ({Predecessor:} 14. f4 exf4 15. Bxf4 Ne5 16. Nb5 Ng6 17. Nxd6 Bxd6 18. Qxd6 Nxf4 19. Qxf4 {0-1 (35) Kimelman,M (2273)-Samsonkin,A (2479) Toronto 2008}) 14... Nb4 15. Nd5 (15. Nd3 $14 Nxd3 16. Qxd3) 15... Bxd5 $11 16. Qxb4 Bc6 17. Ne2 (17. Bb6 $11 Qe8 18. Nd3) 17... Qe8 18. Ng3 d5 $1 19. Qa5 {[%cal Re4d5]} Ra8 ({But not} 19... dxe4 20. Be2 $11) ({Much worse is} 19... Nxe4 $6 20. Bxe4 dxe4 21. Qxe5 $11) 20. Qc7 (20. Qe1 $15 dxe4 21. Be2) 20... dxe4 ({Black should play} 20... d4 $17 21. Bd2 Bc5) 21. Be2 $1 $15 Bd8 22. Qd6 Qe7 23. Bc5 Qxd6 24. Bxd6 Re8 25. c4 g6 26. b4 {[%cal Bb3b4,Bb4b5][%mdl 32]} b6 27. Rc1 (27. Rfe1 $11) 27... Nd7 ({Black should try} 27... Re6 $17 28. c5 b5) 28. Rfd1 f5 29. Rc3 Nf8 {[%cal Bd7f8,Bf8e6,Be6c5][%mdl 32]} 30. Nf1 Be7 31. b5 (31. c5 $5 {[%cal Re2c4]} b5 32. Ne3 $14) 31... Bd7 32. Bxe5 Bb4 $36 {[%mdl 2048] Black fights for an advantage.} 33. Rb3 Bc5 34. Bd6 {[#] Hoping for Bxf8.} Ne6 35. Bxc5 ({Better is} 35. Be5 $11 Nf8 36. Bd6) 35... Nxc5 36. Rc3 Be6 37. Ne3 Kf7 38. Rd6 (38. g3 $11 {keeps the balance.}) 38... Reb8 (38... Rad8 $17 39. Rxd8 (39. Rxb6 Rd2 $17) 39... Rxd8) 39. Nc2 (39. Nd5 $14) 39... Ke7 40. Rd1 Ra4 (40... Rd8 $17 {...Rxd1+ is the strong threat.} 41. Nd4 Kf6) 41. f3 Kf6 42. Bf1 Nb7 (42... exf3 $15 43. gxf3 f4) 43. fxe4 $11 fxe4 44. Rxa3 (44. Kf2 $11) 44... Rba8 45. Rxa4 Rxa4 46. a3 Ke5 47. Kf2 Nc5 48. Rd8 Bxc4 49. Bxc4 Rxc4 {[%mdl 4096] Endgame KRN-KRN} 50. Nb4 Rc3 51. Nc6+ Kf4 {[#] White must now prevent ...Nd3+.} 52. Rf8+ Kg5 53. Ra8 Rc2+ 54. Kg3 Ne6 55. Ra4 Rc3+ 56. Kf2 {The position is equal.} Nf4 57. Rxe4 Rxa3 58. Nd4 {Strongly threatening h4+!} Nd3+ 59. Ke2 Nc1+ 60. Kf2 Nd3+ 61. Ke2 Nf4+ {Accuracy: White = 41%, Black = 37%.} 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Balakrishnan, Praveen"]
[Black "Stukopin, Andrey"]
[Result "1/2-1/2"]
[ECO "B48"]
[WhiteElo "2418"]
[BlackElo "2565"]
[Annotator "TA"]
[PlyCount "165"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,165,35,25,69,67,75,72,66,28,41,0,0,-24,0,-60,-50,-42,0,-56,-45,-26,-19,-115,-115,-170,-166,-154,-88,-97,0,0,58,65,81,68,69,-29,-30,-27,-28,-27,-26,-91,-34,-222,-15,-14,-7,-33,-31,-29,-28,-101,-47,-163,-102,-185,-173,-285,-236,-235,-222,-335,-306,-451,-413,-504,-506,-556,-247,-247,-186,-187,-199,-196,-195,-222,-196,-188,-193,-241,-235,-333,-304,-294,-167,-157,-103,-103,-103,-103,-66,-66,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7 6. Be3 a6 7. Qd2 Nf6 8. O-O-O Bb4 9. f3 Ne7 {B48: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 without Be2} (9... O-O 10. g4 b5 11. g5 Nh5 12. Kb1 Rb8 13. Nxc6 dxc6 14. f4 c5 15. Be2 g6 16. Bxh5 gxh5 17. f5 {1-0 (27) Saric,I (2657)-Bosiocic,M (2611) Batumi 2018}) 10. Nde2 b5 11. Kb1 Ba5 12. Bf4 e5 13. Bg5 {LiveBook: 12 Games} b4 14. Na4 b3 15. Nec3 bxa2+ 16. Kxa2 $146 ({Predecessor:} 16. Ka1 Bb4 17. Bxf6 gxf6 {0-1 (36) Green,A (1951)-Beck,F (2292) Sibenik 2007}) 16... Bb4 $1 17. Kb1 Rb8 $1 18. Bxf6 gxf6 19. Nd5 (19. f4 $11) 19... Nxd5 $15 20. Qxd5 Bb7 21. Qa2 (21. Qc4 $11 Qa5 22. b3) 21... Bc6 22. Bc4 O-O {White must now prevent ...Bxa4.} 23. Bb3 (23. Bd5 $11) 23... Rb5 $1 $17 24. g4 (24. Rd5 $17 {is a better defense.}) 24... Ra5 $19 25. g5 Kh8 (25... fxg5 $142 26. Rdg1 Rb8 27. Rxg5+ Kh8) 26. gxf6 Rg8 (26... d6 $17 27. c3 Bxc3 $1 {[%mdl 512]} 28. bxc3 Rb8) 27. Rhg1 $11 Rxg1 (27... Rf8 $11) 28. Rxg1 $14 Qa7 $1 {[%cal Ra7g1]} 29. Rd1 Qb8 $1 30. Kc1 ({White should play} 30. c3 $1 $14 Bxc3 31. bxc3 Bxa4 32. Kc2 Bxb3+ 33. Qxb3 Qxb3+ 34. Kxb3 Rb5+ 35. Kc4) 30... Qd8 $40 {[%mdl 128] White needs to defend precisely.} 31. c3 Bf8 32. Bc2 Qxf6 33. Qc4 (33. Kb1 $1 $11 {keeps the balance.}) 33... Qxf3 (33... Bb5 $17 34. Qc8 Qh6+ {[%mdl 64] Double Attack} 35. Kb1 Rxa4) 34. Rf1 $2 (34. Kb1 $15) 34... Bb5 $2 (34... Qe3+ $1 $19 35. Kb1 Bxa4) 35. Rxf3 {Intending Qc8 and mate.} Bxc4 36. b3 Bh6+ 37. Kd1 Be6 {Threatens to win with ...Bg4.} 38. Rd3 {[#]} (38. Ke1 $11) 38... Rb5 ({Black should try} 38... Bf8 $1 $17 39. Rg3 Rb5) 39. Rd6 (39. c4 $1 $15 Rb8 40. Nc5) 39... a5 (39... Rb8 $19 40. b4 Rg8) 40. c4 (40. Rb6 $17 {was worth a try.} Rxb6 41. Nxb6) 40... Rb8 $19 41. Bd3 (41. Rd3 $142) 41... Rg8 ({Much less strong is} 41... Rxb3 42. Nc5 $19) 42. Bf1 Be3 43. Nc3 (43. Rd3 $142 Bd4 44. Kd2) 43... Rg1 44. Ke2 (44. Ke1 {keeps fighting.}) 44... Bd4 45. Nb5 Bc5 46. Rd3 {[#]} Rg4 (46... a4 $142 $1 {[%mdl 512] ...axb3 is the strong threat.} 47. Rg3 (47. bxa4 Bxc4) 47... a3 48. Nxa3 Rxg3 49. hxg3 Bxa3) 47. Nc3 Rf4 48. Bh3 Bd4 49. Bxe6 fxe6 ({Don't play} 49... dxe6 50. Rh3 $17) 50. Rh3 Bxc3 51. Rxc3 Rxe4+ {[%mdl 4096] Endgame KR-KR} 52. Kf2 Rf4+ 53. Kg2 (53. Ke1 $142) 53... Kg7 54. c5 Rf8 (54... e4 $142 55. c6 dxc6 56. Rxc6 Kf6) 55. Rd3 Rd8 ({Better is} 55... Rf7 56. Rg3+ Kf8) 56. Kf3 $17 Kf6 57. Ke4 Ke7 58. Rh3 Rc8 (58... d5+ $1 $15 59. Kxe5 Kd7) 59. Rxh7+ $11 {The position is equal.} Kf6 60. Rxd7 Rxc5 61. Rd3 Rb5 62. Rf3+ Ke7 63. Rd3 Kf7 64. Rf3+ Ke7 65. Rd3 Rc5 66. h4 Rb5 67. Rh3 Kd6 {( -> ...Rb4+)} 68. Rd3+ Ke7 69. Rh3 Kf6 {And now ...Rb4+ would win.} 70. Rf3+ Kg6 71. Rg3+ Kh5 72. Rg5+ Kxh4 73. Rxe5 Rb4+ 74. Kd3 Rxb3+ 75. Kd2 $1 Rb2+ 76. Kd3 Rb3+ 77. Kd2 Rb6 {aiming for ...Ra6.} 78. Rxa5 Kg4 79. Ke3 Rb1 80. Re5 Rf1 81. Ke2 Rf6 82. Ke3 Rf3+ 83. Ke4 {Accuracy: White = 42%, Black = 57%.} 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Jacobson, Brandon"]
[Black "Ali Marandi, Cemil Can"]
[Result "1/2-1/2"]
[ECO "D12"]
[WhiteElo "2404"]
[BlackElo "2530"]
[Annotator "TA"]
[PlyCount "197"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,197,9,34,31,16,10,83,72,87,-14,-4,-46,-43,-38,-38,-45,-12,-7,0,0,41,34,40,44,87,44,44,73,68,45,42,45,124,126,133,127,166,166,165,108,121,106,146,29,19,26,20,18,18,18,18,18,87,18,52,19,89,81,83,77,77,82,272,228,340,241,865,891,1532,1527,1236,1157,931,0,0,0,0,0,29973,29974,29974,29975,29972,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,7,8,0,16,8,8,8,8,8,15,16,16,16,28,0,0,62,99,0,0,0,0,0,0,0]} 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 8. Qb3 Qc7 9. Bd2 {D12: Slav Defence: 3 Nf3 Nf6 4 e3 Bf5} Be7 10. g3 (10. O-O-O dxc4 11. Bxc4 a6 12. Be2 Nbd7 13. Nxg6 hxg6 14. Kb1 c5 15. d5 exd5 16. Nxd5 Nxd5 17. Qxd5 {0-1 (31) Karjakin,S (2773)-Caruana,F (2822) Saint Louis 2018}) 10... O-O {LiveBook: 33 Games} 11. g4 {White is slightly better.} dxc4 12. Bxc4 c5 $146 (12... a5 $11) ({Predecessor:} 12... Nd5 13. Nxg6 hxg6 14. O-O-O Nxc3 15. Bxc3 Nd7 16. Qc2 Nb6 {½-½ (34) Laghetti,G (2469)-Voiculescu,C (2458) ICCF email 2016}) 13. Nxg6 hxg6 14. d5 (14. g5 $1 $16 {[%cal Rg5f6]} Nfd7 15. d5) 14... exd5 15. Nxd5 Nxd5 16. Bxd5 Bh4+ 17. Kf1 Nc6 18. Kg2 Ne7 19. Bc4 b5 20. Qxb5 (20. Bxb5 Rab8 $15) 20... Rab8 21. Qa5 $1 $36 {[%cal Ra5c7][%mdl 2048] White has some pressure.} Qd6 22. Bc3 {And now Rhd1 would win.} Nd5 23. Bxd5 $1 Qxd5 24. Qa6 (24. Rhd1 $5 {[%cal Rd1d5]} Qg5 25. Rd3 $16 (25. Qxa7 Qxe3 26. Rd2 Bf6 $11)) 24... Rfe8 25. Qe2 (25. Qxa7 Ra8 $15) 25... Qg5 (25... Bf6 $14) 26. e4 $16 f5 27. Rad1 Qe7 {[%cal Rf5e4]} 28. Qc4+ Kh7 {[%cal Rf5e4]} 29. Rhf1 ({Better is} 29. e5 $18) 29... fxg4 30. fxg4 Rf8 31. Rxf8 (31. e5 $16) 31... Rxf8 $11 32. Rf1 Rxf1 33. Kxf1 Qf8+ 34. Ke2 Qf2+ 35. Kd1 {Black should prevent Qe2.} Qxh2 (35... Qg1+ $11 36. Kc2 Qxh2+ 37. Kb3 Qb8+ 38. Ka3 Qb7) 36. e5 (36. Qf7 $6 Qh1+ 37. Kc2 Qxe4+ 38. Kb3 Bf6 $11) (36. Qe2 $1 $16 {[%cal Re2h2]} Qd6+ 37. Kc2) 36... Qg2 37. e6 Be7 (37... Qg1+ $11 {remains equal.} 38. Kc2 Qg2+ 39. Kb3 Qb7+ 40. Ka4 Qc6+ 41. Ka3 Be7) 38. Qe2 $16 Qd5+ 39. Kc2 c4 {[#]} 40. a3 $1 {[%cal Ba2a3,Ba3b4][%mdl 32]} Kg8 $2 (40... Qc6 $16) 41. Bb4 $18 Bxb4 (41... Bf6 $142 42. Kb1 (42. e7 Qd3+ 43. Qxd3 cxd3+ 44. Kxd3 Kf7 $16) 42... Qb5) 42. axb4 {[%mdl 4096] Endgame KQ-KQ} Qb5 $2 (42... Kf8 43. Qf2+ Kg8) 43. Kc3 a5 44. Qxc4 Qe5+ 45. Kb3 axb4 46. e7+ $2 (46. Qc8+ $18 Kh7 47. Qd7 (47. Kxb4 Qxb2+ 48. Ka5 Qd4 $14) 47... Qg3+ 48. Ka4 (48. Kxb4 Qxg4+ 49. Kc5 Qf5+ 50. Qd5 Qc2+ 51. Kd6 Qxb2 $16) 48... Qxg4 49. Qd6) 46... Kh7 $11 47. Qf7 Qe3+ 48. Kc4 ({Don't take} 48. Kxb4 $6 Qb6+ 49. Kc4 Qc6+ 50. Kd4 Qb6+ 51. Kc4 Qc6+ 52. Kd3 Qb5+ 53. Ke3 Qc5+ 54. Kf3 Qc6+ 55. Kf4 (55. Kg3 Qd6+ 56. Kg2 Qc6+ 57. Kf2 Qb6+ 58. Kf3 Qc6+ 59. Kf4 Qc7+ 60. Ke4 Qc2+ 61. Ke3 Qc5+ 62. Kd3 Qb5+ 63. Ke3 Qb6+ 64. Ke4 Qb7+ 65. Ke3 Qb6+ 66. Kf3 Qc6+ $16) 55... Qc7+ 56. Ke4 Qc2+ 57. Ke3 Qc5+ 58. Kd3 Qb5+ 59. Ke3 Qc5+ $16) 48... Qe4+ $2 {[%mdl 8192] [#]} (48... Qe2+ $11 49. Kc5 (49. Kxb4 Qxb2+ 50. Kc5 Qe5+ 51. Kc6 Qe4+ 52. Kc7 Qe5+ 53. Kc6 Qe4+ 54. Kd6 Qb4+ 55. Kc7 Qa5+ 56. Kd6 Qa6+ 57. Kc7 Qa5+ 58. Kc8 Qa8+ 59. Kc7 Qa5+ $11) 49... Qe5+ 50. Kc6 Qe4+ 51. Kd6 Qd4+ 52. Qd5 Qb6+ 53. Qc6 Qd4+ 54. Kc7 Qa7+ 55. Qb7 Qc5+ 56. Kd7 Qd4+ 57. Kc8 Qc4+ 58. Kd8 Qd4+ 59. Kc8 Qxg4+ 60. Qd7 Qf3) 49. Kc5 $1 Qe5+ 50. Kc6 Qe4+ 51. Kb6 $2 (51. Kd6 {mates} Qd4+ 52. Qd5 Qb6+ 53. Kd7 Qa7+ 54. Ke6 Qa6+ 55. Kf7 Qf1+ 56. Ke8) 51... Qd4+ $1 52. Ka6 Qd6+ 53. Kb5 Qd7+ 54. Kc4 ({Don't do} 54. Kxb4 $6 Qd6+ 55. Kc4 Qc6+ 56. Kd4 Qb6+ 57. Kc4 Qa6+ 58. Kd4 Qb6+ 59. Ke4 Qb7+ 60. Kd3 Qb5+ 61. Qc4 Qd7+ 62. Kc2 Qxe7 $16) 54... Qxg4+ 55. Kb5 Qd7+ $1 56. Ka5 Qa7+ 57. Kxb4 Qd4+ 58. Kb3 Qd3+ 59. Kb4 Qd2+ 60. Kc5 Qe3+ 61. Kb5 Qe2+ 62. Ka5 Qe5+ 63. Ka4 Qe4+ 64. b4 Qc2+ 65. Ka5 Qc7+ 66. Kb5 Qe5+ 67. Kc6 Qe4+ 68. Kc7 Qe5+ 69. Kb6 Qd6+ 70. Ka5 Qc7+ 71. Ka4 Qc2+ 72. Qb3 Qc6+ 73. b5 Qa8+ 74. Kb4 {White wants to mate with Qh3+.} Qe4+ 75. Ka5 {Intending Qh3+ and mate.} Qxe7 76. b6 Qb7 77. Qh3+ Kg8 78. Qe6+ Kh7 79. Qh3+ Kg8 80. Qb3+ Kh7 81. Qc2 Qd5+ 82. Ka6 Qa8+ 83. Kb5 Qe8+ 84. Qc6 Qe2+ 85. Qc4 Qe8+ 86. Qc6 Qe2+ 87. Kc5 {Strongly threatening Qh1+.} Qf2+ 88. Kd6 {Hoping for Qh1+.} Qf4+ 89. Kd7 Qf7+ 90. Kd8 Qf8+ $1 91. Kc7 Qe7+ 92. Kc8 Qf8+ 93. Kb7 {Qh1+ is the strong threat.} Qe7+ 94. Qc7 Qe4+ 95. Kc8 {Black must now prevent Qh2+.} Qa8+ 96. Qb8 (96. Kd7 $16) 96... Qc6+ {The position is equal.} 97. Kd8 Qf6+ 98. Kc8 {Threatens to win with Qh2+.} Qe6+ 99. Kc7 {Accuracy: White = 42%, Black = 59%.} 1/2-1/2

[Event "Bay Area Open 2019"]
[Site "Burlingame"]
[Date "2019.01.04"]
[Round "5"]
[White "Yoo, Christopher Woojin"]
[Black "Ramirez, Alejandro"]
[Result "1/2-1/2"]
[ECO "C66"]
[WhiteElo "2388"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2019.01.01"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,54,0,6,0,-68,-56,-56,-56,-45,-37,-61,-59,-38,-66,-67,-30,-46,-26,-29,-24,-20,-19,-18,-22,-13,-7,-21,0,0,0,0,0,-3,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. c3 g6 6. O-O Bg7 7. Re1 O-O {C66: Ruy Lopez: Steinitz Defence} 8. h3 Re8 9. Nbd2 a6 10. Ba4 b5 11. Bb3 Na5 12. Bc2 {LiveBook: 3 Games} c5 13. d4 $146 ({White should play} 13. a3 $11) ({Predecessor:} 13. a4 Bb7 14. Nh2 d5 15. Ng4 Nh5 16. axb5 axb5 17. exd5 Qxd5 {0-1 (44) Handke,F (2525)-Howell,D (2698) Germany 2018}) 13... exd4 $15 14. cxd4 cxd4 15. Nxd4 Qb6 16. N4b3 Bb7 17. Nxa5 Qxa5 18. a4 Rac8 19. Bd3 $1 Qb4 {[%cal Rf6e4]} (19... Qb6 {with more complications.} 20. axb5 axb5 21. Bf1 Qc6 22. Qb3 Nxe4 23. Nxe4 Rxe4 24. Rxe4 Qxe4 25. Be3 Bc6) 20. axb5 axb5 {[%cal Rf6e4]} 21. Qb3 Qxb3 {The position is equal.} 22. Nxb3 Nxe4 {And now ...Nc5 would win.} 23. Bxb5 Re5 24. Be2 Nc5 25. Nxc5 Rexc5 26. Be3 Rc2 27. Rad1 Rxb2 {Accuracy: White = 86%, Black = 60%.} 1/2-1/2

