[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.20"]
[Round "1.1"]
[White "Sevian, Samuel"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2642"]
[BlackElo "2828"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,86,8,11,0,0,2,10,7,6,11,4,0,4,-7,0,-7,0,-5,-8,-8,8,8,7,7,7,0,0,0,0,0,0,-7,0,-14,-14,-12,-7,-18,-16,-12,-19,-8,0,0,0,0,0,0,0,-7,0,-7,-7,-7,0,-7,-7,-7,-7,-7,-7,-7,-7,-7,-7]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c4 b4 12. Nc2 a5 {The position is equal.} 13. g3 {B33: Sicilian: Pelikan and Sveshnikov Variations} O-O 14. Bg2 g6 15. O-O Bg7 16. Qd3 Be6 17. a3 $146 ({Predecessor:} 17. b3 Ra7 18. Rfd1 Rb7 19. a3 bxa3 20. Rxa3 Qb8 {½-½ (39) Larsen,L (2448)-Vaclav,J (2481) ICCF email 2009}) 17... bxa3 18. Qxa3 Qb8 19. Rfd1 Ra7 {[%cal Ba8a7,Ba7b7,Bb7b3][%mdl 32]} 20. b3 Rb7 21. Rab1 Nd4 22. Nxd4 exd4 23. Bf1 h5 24. Bd3 h4 25. Qxa5 Rxb3 26. Qd2 Bxd5 27. exd5 Bf6 28. Qc2 Rxb1 29. Rxb1 Qa7 30. Qd2 Kg7 31. Qf4 Qa3 32. Qe4 Rh8 33. Rb7 {[#] Threatening mate with Qxg6+.} Qc1+ 34. Bf1 hxg3 35. hxg3 Rh5 36. Rb1 Qc3 37. Rd1 Be5 38. Bd3 Qb2 {White must now prevent ...Bxg3!} 39. Qe2 Qb8 40. Rb1 Qc8 41. Qf3 Bf6 42. Re1 Re5 43. Rxe5 Bxe5 {Accuracy: White = 52%, Black = 72%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.20"]
[Round "1.2"]
[White "Nakamura, Hikaru"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "E06"]
[WhiteElo "2746"]
[BlackElo "2762"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,64,18,28,12,38,8,25,21,16,15,20,9,27,20,18,18,39,33,26,18,25,25,48,1,39,30,48,48,48,48,56,56,56,56,57,57,57,57,57,0,51,0,49,0,47]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Ne5 Nc6 8. Bxc6 bxc6 9. Nxc6 Qe8 10. Nxe7+ Qxe7 11. Qa4 e5 12. dxe5 {E05: Open Catalan: 5 Nf3 Be7} Qxe5 13. Re1 $146 ({Predecessor:} 13. Nc3 Ne4 14. Qxc4 Nxc3 15. bxc3 Be6 16. Bf4 Bxc4 17. Bxe5 c6 18. Rfe1 Rfe8 19. Bd4 Bxe2 {½-½ (28) Meier,G (2628)-Giri,A (2782) Dortmund 2018}) 13... Be6 14. Nc3 {White has an edge.} Ne4 15. Qc2 {[#] Bf4 is the strong threat.} Nxc3 16. Qxc3 Qxc3 17. bxc3 Rab8 18. f3 Rfd8 19. Bf4 Rb2 20. Rad1 (20. Kf2 {looks sharper.} f6 21. Bxc7 Rdd2 22. a4 Kf7 23. Bf4) 20... Rxd1 21. Rxd1 $11 {[%cal Rd1d8][%mdl 4096] [#] Endgame KRB-KRB} h5 22. Rd8+ ({Much worse is} 22. Bxc7 Rxe2 23. a4 Re3 $17) 22... Kh7 23. Rd2 Rxd2 24. Bxd2 {KB-KB} Kg6 25. Kf2 Bh3 26. Bf4 c6 27. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Kf5 28. a5 a6 29. Ke3 Bf1 30. Kf2 Bh3 31. Ke3 Bf1 $1 32. Kf2 Bh3 {Accuracy: White = 58%, Black = 52%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.20"]
[Round "1.3"]
[White "Shankland, Samuel"]
[Black "Robson, Ray"]
[Result "1/2-1/2"]
[ECO "D11"]
[WhiteElo "2731"]
[BlackElo "2667"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,97,23,20,14,20,19,18,18,25,24,25,19,12,11,11,11,14,11,15,10,16,18,20,20,22,21,24,16,20,15,30,26,42,15,29,8,17,22,23,5,5,0,0,0,12,8,11,0,1,1,6,7,4,8,16,3,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bg4 5. h3 Bh5 6. g4 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4} (6. Nc3 e6 7. g4 Bg6 8. Ne5 Nbd7 9. Nxg6 hxg6 10. g5 Ne4 11. Nxe4 dxe4 12. Qb3 Qb6 13. h4 Bb4+ 14. Ke2 c5 15. Bg2 f5 16. gxf6 gxf6 {1-0 (57) Nihal,S (2576)-Vitiugov,N (2719) St Petersburg 2018}) 6... Bg6 7. Ne5 e6 8. Nd2 Nbd7 9. h4 dxc4 10. Bxc4 Nxe5 11. dxe5 Ne4 {...h5 is the strong threat.} 12. h5 Nxd2 13. Bxd2 Bd3 14. Qb3 Bxc4 15. Qxc4 Qd5 $146 16. Qxd5 cxd5 17. Ke2 Be7 18. e4 O-O-O 19. Be3 Kb8 20. Kd3 b6 21. Rac1 Rd7 22. Rc2 Rc8 23. Rxc8+ Kxc8 $11 {[%mdl 4096] Endgame KRB-KRB} 24. f4 dxe4+ {The position is equal.} 25. Kxe4 Rc7 26. Rh2 Kd7 27. b3 Ke8 28. f5 Rc3 29. Kd4 Rc6 30. Kd3 Rc7 31. Rf2 Bb4 32. f6 gxf6 33. exf6 Rc3+ 34. Ke4 Rxe3+ {[%mdl 64] [#] Remove Defender} 35. Kxe3 {Hoping for Rc2. KR-KB} Bc5+ 36. Ke2 {And now Rf1 would win.} Bxf2 37. Kxf2 {KP-KP} Kd7 {aiming for ...e5.} 38. Kf3 {Threatens to win with Kf4.} e5 {White must now prevent ...b5.} 39. Ke4 Kd6 $1 40. Kf5 Kd5 41. g5 e4 42. g6 hxg6+ 43. hxg6 fxg6+ 44. Kxg6 {[#] Strongly threatening f7. K3P-K3P} e3 $1 45. f7 e2 46. f8=Q e1=Q 47. Qa8+ Kd6 48. Qb8+ Kc6 49. Qc8+ {Accuracy: White = 72%, Black = 75%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.20"]
[Round "1.4"]
[White "Akobian, Varuzhan"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2625"]
[BlackElo "2739"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,65,13,33,16,29,35,37,13,35,15,20,20,14,17,30,7,32,27,33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Rb1 Be7 {D35: Queen's Gambit Declined: Exchange Variation} 8. Nf3 O-O 9. Bc4 a6 10. a4 Qc7 {LiveBook: 4 Games. next ...cxd4 is good for Black.} 11. Bd3 Nc6 12. O-O cxd4 13. cxd4 Nb4 14. Ba3 Nxd3 15. Qxd3 Bxa3 16. Qxa3 {[#]} Bd7 $146 17. Ne5 {[#] Black must now prevent Qe7.} Rfc8 18. Rfc1 Qd8 $1 19. Nxd7 Qxd7 {The position is equal.} 20. Qb2 Qxa4 21. Rxc8+ Rxc8 22. Qxb7 $11 {[%mdl 4096] Endgame KQR-KQR} Qc4 {[#] ( -> ...Qc1+!)} 23. h3 h6 24. d5 exd5 25. exd5 Rd8 26. Rd1 Qb5 27. Qxb5 axb5 {KR-KR} 28. d6 Kf8 29. Rd5 Rb8 30. d7 Ke7 31. d8=Q+ Rxd8 32. Rxb5 Kf8 33. g3 {Precision: White = 66%, Black = 76%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.20"]
[Round "1.5"]
[White "Gareyev, Timur"]
[Black "Xiong, Jeffery"]
[Result "0-1"]
[ECO "A09"]
[WhiteElo "2557"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,76,-20,-8,-58,-15,-7,-20,-10,-12,-18,25,-12,-22,-22,0,0,0,-26,25,35,31,0,0,0,28,7,0,0,0,0,4,-45,-52,-50,-52,-40,-28,-100,-97,-135,-125,-272,-259,-283,-280,-319,-256,-620,-615,-564,-399,-441,-439,-807,-807,-2654,-2737,-1010,-876,-29981,-29982,-29982,-29983,-29987,-29988,-29988,-29989,-29990,-29990]} 1. Nf3 d5 2. c4 d4 3. b4 Bg4 4. Ne5 Bf5 5. e3 Nf6 $146 ({Predecessor:} 5... Qd6 6. Nf3 e5 7. c5 Qd5 8. Bb5+ c6 9. Ba4 Bg4 10. Bb3 Bxf3 11. gxf3 Qd8 {0-1 (61) Adhiban,B (2630)-Naroditsky,D (2622) Caleta 2015}) 6. g4 {A09: Réti Opening: 1 Nf3 d5 2 c4} Be4 7. f3 $1 {[%cal Rf3e4]} Bg6 8. Bb2 {The position is equal.} dxe3 9. dxe3 Nbd7 10. Nxg6 hxg6 11. Nc3 e6 12. c5 c6 13. g5 (13. h4 {seems wilder.} Qc7 14. Kf2 b6 15. Be2 a5 16. a3) 13... Nd5 (13... Nh7 $142 $1) 14. Nxd5 $11 exd5 15. f4 Qe7 {Strongly threatening ...Qe4.} 16. Qd2 Rh4 {...a5 is the strong threat.} 17. Qf2 Qe4 $36 {[%mdl 2112] [#] Double Attack. Black has some pressure.} 18. a3 $1 {Black must now prevent Bg2.} Qxh1 19. Qxh4 a5 {Threatens to win with ...Qe4.} 20. Qf2 axb4 21. axb4 Rxa1+ 22. Bxa1 Qe4 23. Bc3 (23. Qb2 $1 $11 {remains equal.}) 23... b6 $17 {[%cal Bb7b6,Bb6c5][%mdl 32]} 24. Kd2 bxc5 25. b5 (25. Bd3 $17 Qh1 26. b5 cxb5 27. Bxb5) 25... cxb5 $19 26. Bxb5 {[#]} c4 $1 27. Qe2 Qb1 28. Bxd7+ $2 (28. Bxc4 dxc4 29. Qxc4) 28... Kxd7 29. Qg4+ Qf5 30. h3 Kc6 31. Ke2 (31. Ke1 $142 Kb5 32. Qxf5 gxf5 33. Kd1) 31... Kb5 32. Bd4 Qxg4+ 33. hxg4 {[%mdl 4096] Endgame KB-KB} Kb4 34. e4 dxe4 {Black mates.} 35. Kd2 Bc5 36. Bxg7 Kb3 37. f5 e3+ 38. Ke2 c3 {Accuracy: White = 21%, Black = 66%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.20"]
[Round "1.6"]
[White "Liang, Awonder"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "B40"]
[WhiteElo "2590"]
[BlackElo "2637"]
[Annotator "TA"]
[PlyCount "240"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,240,0,0,22,0,10,0,12,-4,-4,-14,-16,-3,0,0,0,0,0,0,0,0,-10,-39,-12,-83,-82,-99,-52,-62,-50,-47,0,0,0,-47,46,38,45,34,31,39,103,108,109,122,114,58,123,106,111,114,112,116,100,0,0,0,0,-203,-205,-221,-221,-215,-214,-207,-217,-230,-229,-247,-248,-252,-245,-384,-379,-367,-220,-230,-224,-255,-239,-334,-334,-343,-289,-288,-288,-345,-334,-337,-335,-345,-246,-239,-251,-254,-246,-247,-243,-210,-239,-239,-239,-246,-246,-246,-247,-264,-239,-271,-276,-301,-266,-342,-287,-276,-212,-207,-210,-220,-185,-174,-148,-148,-102,-102,-102,-102,-80,-80,-80,-80,-80,-80,-80,-84,-87,-102,-75,-75,-75,-75,-75,-75,-75,-75,-75,-102,-85,-102,-102,-102,-49,-102,-102,-102,-102,-102,-62,-70,-8,-102,-102,-143,-143,-143,-143,-143,-143,-109,-8,-8,-8,-8,-8,-8,-8,-8,-8,-38,-38,-38,-8,-8,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Nxc6 bxc6 7. Bd3 d5 8. O-O Be7 9. Qf3 O-O 10. Re1 a5 {B40: Sicilian: 2...e6, Unusual lines} (10... d4 11. e5 dxc3 12. exf6 Bxf6 13. bxc3 Qa5 14. Qxc6 Bd7 15. Qxd7 Bxc3 16. Bd2 Bxd2 17. Re4 Bc3 18. Rd1 {½-½ (31) Gholami,A (2434)-Braun,A (2577) Riga 2017}) 11. exd5 exd5 12. h3 $146 ({Predecessor:} 12. Qg3 Bd6 13. Bf4 Nh5 {0-1 (25) Litvinova,O (1640)-Ressler,V (1965) Prague 2010}) 12... Bd6 13. Ne2 Re8 14. Bg5 Be5 15. Rab1 h6 (15... Qd6 {feels hotter.} 16. c4 Ba6 17. b3 Nd7 18. Bf5 Nc5) 16. Bf4 Qd6 17. Bxe5 Rxe5 18. c4 Be6 19. Red1 Re8 20. Qg3 Bd7 21. Nd4 (21. Rbc1 $11) 21... Nh5 $1 $17 {[%cal Rh5g3]} 22. Qf3 {[#]} Nf4 $1 {[%mdl 512]} 23. Bf1 ({Not} 23. Qxf4 $2 Re1+ 24. Rxe1 Rxe1+ 25. Rxe1 Qxf4 $19) 23... Qf6 {Threatens to win with ...c5.} 24. g3 Rg5 25. Kh2 Re4 26. Nb3 Nxh3 (26... Rh5 $15 27. Nd2 (27. gxf4 Rxf4 28. Qxh5 Rf5 $11) 27... Bxh3 28. Bxh3 Rxh3+ 29. Kg1 Rd4) 27. Qxf6 $14 gxf6 28. Nc5 $36 {[%mdl 2048] White has the initiative.} Nxf2 29. Nxd7 Ng4+ (29... Kg7 $14) 30. Kg1 $16 Re7 31. Nb6 $1 {[%cal Rc4d5]} Ne3 32. Rd2 (32. Rd3 $16) 32... Rxg3+ (32... Re4 $14) 33. Kf2 $1 {[%cal Rf2g3]} Rg5 {[#]} 34. Bh3 $1 Re4 35. cxd5 cxd5 {[#]} 36. Nd7 (36. Kf3 $1 $16) 36... Kg7 $11 37. Nc5 Rh4 $1 {[%cal Rh4h3]} 38. Kxe3 $2 (38. Rh1 $1 $11 {and White has nothing to worry.}) 38... Rxh3+ $19 39. Kd4 Rh4+ 40. Ke3 {[#]} d4+ $1 {[%mdl 576] Discovered Attack} 41. Rxd4 Rh3+ 42. Kf2 Rxc5 {[%mdl 4096] Endgame KRR-KRR} 43. Rg1+ Rg5 44. Rg2 Rh1 45. Ra4 (45. Rc4 {is the only way for White.}) 45... Rc1 {Hoping for ...Rc2+.} 46. Kf3 Rcc5 (46... Rf1+ $142 47. Ke2 Rb1 48. Rxg5+ fxg5) 47. Rh2 h5 48. Rhh4 Kg6 49. b3 Rc3+ 50. Kf2 Rd5 51. Rhe4 Rf5+ 52. Kg2 Rc2+ 53. Kg3 Kg5 54. Rec4 Rcf2 {[%csl Gf2][%cal Rf5f3]} 55. Rc3 Rf1 56. Kh3 Rh1+ 57. Kg2 Rd1 58. Rg3+ Kh6 59. Rf3 Rd2+ 60. Kg3 Rg5+ 61. Kh3 Kg6 62. Rc3 Rd1 {[%cal Rd1h1]} 63. Kh2 Rdd5 64. Rc8 Kg7 65. Kh3 Rd3+ 66. Kh2 Re5 {( -> ...Re2+)} 67. Rc2 Rdd5 68. b4 axb4 69. Rxb4 Rd3 70. Rf2 f5 71. Rg2+ Kf6 72. Rh4 Re4 73. Rxh5 Rg4 74. Rb2 Kg6 75. Rh8 Ra3 76. Rg8+ Kf6 77. Rh8 Rga4 78. Kg2 Kg5 79. Rg8+ Kf4 80. Rf2+ Ke5 81. Re8+ Kf6 82. Rh8 Rg4+ 83. Kh2 f4 84. Rg2 Rg6 (84... Rg5 $17 85. Rxg5 Kxg5) 85. Rb2 (85. Rh5 $1 $15) 85... Kf5 86. Rhb8 Rh6+ (86... Rag3 {is interesting.} 87. Rh8 Re3 88. Rhb8 Ke5 89. Rg2 Rd3) 87. Kg1 Kg4 88. R8b3 Rxb3 (88... Rha6 $15) 89. Rxb3 $15 {KR-KR} (89. axb3 $11 {remains equal.} Kg3 90. Rg2+ Kf3 91. b4) 89... Rc6 $17 90. a3 Rc1+ 91. Kf2 Rc2+ 92. Kf1 Ra2 93. Rc3 f3 (93... Rb2 $17) 94. Rc8 $1 $11 Rxa3 (94... Rb2 {seems wilder.} 95. a4 Ra2 96. Rg8+ Kf4 97. Rf8 f5) 95. Rg8+ Kf4 96. Rf8 $1 Ra7 97. Kf2 Re7 98. Rb8 Re2+ 99. Kf1 Ra2 100. Rf8 $1 {The position is equal.} Ra7 (100... Ke3 {looks sharper.} 101. Re8+ Kd4 102. Re7 f5 103. Rd7+ Ke4) 101. Kf2 f5 102. Rb8 Re7 103. Ra8 Re2+ 104. Kf1 Rb2 105. Rc8 Rd2 106. Ra8 Rd4 107. Kf2 Re4 108. Rb8 Re2+ 109. Kf1 Rh2 110. Ra8 Rh4 111. Rb8 Kg3 {[%cal Rh4h1]} 112. Rg8+ Rg4 113. Rb8 Rc4 {[%cal Rc4c1]} 114. Rg8+ Kf4 115. Kf2 Rc2+ 116. Kf1 f2 117. Rb8 $1 Kg4 118. Rb4+ f4 {White must now prevent ...Rc1+.} 119. Rb3 f3 {Strongly threatening ...Rc1+.} 120. Rb4+ Kf5 {Accuracy: White = 64%, Black = 60%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.21"]
[Round "2.1"]
[White "Xiong, Jeffery"]
[Black "Akobian, Varuzhan"]
[Result "1/2-1/2"]
[ECO "C14"]
[WhiteElo "2663"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,97,11,15,5,11,14,6,9,1,-3,0,0,0,8,0,0,0,0,0,0,0,0,-20,-34,-97,0,0,0,0,28,10,12,12,18,23,27,17,22,23,24,25,16,0,0,0,0,0,0,0,0,0,0,-43,0,0,0,0,0,-15,-18,-37,-38,-37,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. e5 Nfd7 6. Bxe7 Qxe7 7. f4 a6 8. Qg4 g6 {C14: French: Classical System: 4 Bg5 Be7 main line} (8... f5 9. exf6 Nxf6 10. Qh4 b6 11. Nf3 c5 12. Bd3 Nc6 13. O-O-O cxd4 14. Bg6+ Kd8 15. Nxd4 Nxd4 16. Rxd4 {1-0 (33) Topalov,V (2752)-Vallejo Pons,F (2697) Leon 2012}) 9. Nf3 c5 10. dxc5 Nc6 11. Bd3 Nxc5 12. O-O Bd7 $146 ({Predecessor:} 12... Nxd3 13. cxd3 Qb4 14. Rf2 Bd7 15. Kh1 Ne7 16. a3 Qb6 17. d4 Nf5 18. Qg5 O-O 19. Qf6 Qd8 20. Qxd8 {½-½ (20) Arnold,H (2307)-Cernovsky,K (2353) ICCF email 2013}) 13. Qg3 Rc8 14. Kh1 Nxd3 15. cxd3 Qb4 16. Rab1 Nd4 17. a3 Qc5 18. Nd2 Nf5 19. Qh3 (19. Qf2 $15) 19... Qe3 (19... h5 $17) 20. Qxe3 $11 Nxe3 21. Rfc1 Ke7 22. Kg1 h5 23. Nf3 Nf5 24. Kf2 d4 25. Ne4 Ba4 26. b3 Bc6 27. Nfd2 Bd5 28. Nc4 Rc6 29. Na5 Rcc8 $1 30. Nc4 Rc6 31. Na5 Rcc8 $1 32. Ke2 h4 33. Kd2 b6 34. Nc4 Rc6 35. a4 Rb8 36. Nf6 Bxg2 37. a5 bxa5 38. Nxa5 Rxc1 39. Rxc1 {The position is equal.} Kd8 40. Ne4 {[#] Hoping for Nc6+.} Rb5 41. Nc6+ Ke8 42. Nf6+ Kf8 43. Na7 Rxb3 {[#] White must now prevent ...Rb2+.} 44. Rc8+ Kg7 45. Rg8+ Kh6 46. Nc8 Bc6 47. Nd6 Nxd6 48. Rh8+ Kg7 49. Rg8+ {Accuracy: White = 67%, Black = 74%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.21"]
[Round "2.2"]
[White "Caruana, Fabiano"]
[Black "Robson, Ray"]
[Result "1/2-1/2"]
[ECO "C45"]
[WhiteElo "2828"]
[BlackElo "2667"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,76,-18,-14,0,0,9,4,10,7,4,4,8,8,14,8,8,0,0,0,9,0,5,0,8,0,0,-9,-9,-10,-10,-6,-9,-10,-10,-7,-8,-8,-8,-7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 {[%cal Be2e4,Be4e5][%mdl 32]} e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. h4 Qe6 {C45: Scotch Game} 9. Nd2 {[%cal Bb1d2,Bd2c4,Bc4e5][%mdl 32] LiveBook: 10 Games. The position is equal.} (9. g3 Nb4 10. c4 Ba6 11. Bf4 d5 12. a3 Bxc4 13. Qd1 Bxf1 14. Kxf1 Na6 15. Nc3 Nc5 16. b4 {1-0 (32) Tomczak,J (2614)-Kramnik,V (2779) Batumi 2018}) 9... d6 10. exd6 Bxd6 11. Nc4 Bc5 12. a3 O-O 13. Qxe6 Bxe6 14. Bd3 {[#]} Rfe8 $146 ({Predecessor:} 14... Nf6 15. O-O Ng4 16. Bf4 Bxc4 17. Bxc4 {½-½ (77) Perunovic,M (2608)-Fressinet,L (2657) Heraklio 2017}) 15. O-O a5 16. Ne5 Bc8 17. Nc4 Be6 18. Re1 Nb6 19. Ne5 Bd5 20. Be3 {[%cal Bc1e3,Be3d4,Bd4c3][%mdl 32]} Bd6 21. Bd4 c5 22. Bc3 c4 23. Bf1 $1 Na4 24. Bd4 c5 25. Bxc4 Bxe5 $1 26. Bxd5 Bxd4 27. Bc6 Rxe1+ 28. Rxe1 Rd8 29. Bxa4 Bxb2 $11 {[%mdl 4096] Endgame KRB-KRB} 30. Re7 Kf8 31. Ra7 Rd1+ 32. Kh2 Rd4 33. Rxa5 Rxh4+ 34. Kg1 Bxa3 35. Ra8+ Ke7 36. Ra7+ Kf8 37. Ra8+ Ke7 38. Ra7+ Kf8 {Precision: White = 82%, Black = 83%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.21"]
[Round "2.3"]
[White "Lenderman, Aleksandr"]
[Black "Nakamura, Hikaru"]
[Result "1/2-1/2"]
[ECO "D27"]
[WhiteElo "2637"]
[BlackElo "2746"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,60,22,21,20,36,11,26,18,20,33,13,22,18,5,12,11,0,0,0,0,-8,-2,-8,0,-14,-2,-6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. Nf3 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. b3 cxd4 8. Nxd4 Be7 9. Bb2 O-O {D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4} 10. Nd2 b5 (10... Bd7 11. N2f3 Nc6 12. Nxc6 Bxc6 13. Ne5 Bd5 14. Rc1 Rc8 15. Qe2 Qa5 16. Bd4 Bd6 17. Bxd5 Rxc1 18. Rxc1 Qxd5 {½-½ (31) Kryakvin,D (2554)-Andreikin,D (2736) Sochi 2016}) 11. Be2 Bb7 {White has an edge.} 12. Bf3 Ra7 13. Rc1 Qd7 {The position is equal.} 14. Bxb7 Rxb7 15. N2f3 Rc7 {[#]} 16. Rxc7 $146 ({Predecessor:} 16. Ne5 Qd6 17. Ndf3 {½-½ (27) Bescos Anzano,M (2557)-Fleetwood,D (2562) ICCF email 2015}) 16... Qxc7 17. Qb1 Qb7 18. Rc1 Rc8 19. Ne5 Nfd7 20. Ndf3 (20. Rxc8+ {seems wilder.} Qxc8 21. Nd3 g6 22. h3 Qc7 23. Nf3) 20... Nxe5 21. Nxe5 Nd7 (21... f6 {looks sharper.} 22. Rxc8+ Qxc8 23. Nd3 Qc6 24. Qc1 Qd6) 22. Nxd7 {[#] Hoping for Ne5.} Rxc1+ 23. Qxc1 {aiming for Ne5.} Qxd7 24. Qc2 f6 25. g3 e5 26. e4 Kf7 27. Bc1 Bd6 28. Be3 Qc7 29. Qxc7+ Bxc7 30. Kf1 Ke6 {Accuracy: White = 76%, Black = 65%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.21"]
[Round "2.4"]
[White "So, Wesley"]
[Black "Gareyev, Timur"]
[Result "1-0"]
[ECO "A40"]
[WhiteElo "2762"]
[BlackElo "2557"]
[Annotator "TA"]
[PlyCount "171"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,170,31,53,25,36,40,62,62,43,52,65,68,63,37,60,39,49,27,37,33,36,41,37,4,25,22,24,15,16,9,10,11,14,0,0,0,0,0,0,0,0,0,30,21,51,59,69,69,72,70,77,39,48,44,39,14,13,8,18,8,8,8,8,10,83,83,83,20,20,8,8,8,8,8,8,8,8,8,8,8,8,8,8,37,1603,1570,3801,12071,12071,1843,12071,10988,11936,5085,2931,2012,12071,12050,12050,7635,6717,4527,3732,2843,12794,12580,5995,4454,12809,12810,12831,12832,12832,12831,12830,12831,12829,12830,12837,12839,12848,12849,12849,12849,12845,12847,12845,12849,12844,12797,29941,12842,6683,6038,29960,29960,29960,29963,29973,29976,29973,29968,29974,29975,29955,12842,29987,29988,29989,29990,29991,29990,29992,29993,29997,29998,29999]} 1. d4 Nf6 2. c4 e6 3. g3 Bb4+ 4. Bd2 a5 5. Bg2 O-O 6. Nf3 b6 7. O-O Ba6 8. Ne5 Ra7 9. Bxb4 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations} (9. Qc2 d6 10. Nd3 Bxd2 11. Nxd2 c5 12. d5 exd5 13. cxd5 b5 14. a4 b4 15. Rfe1 Nbd7 16. e4 b3 {0-1 (49) Ponomariov,R (2710)-Nikolic,P (2603) Berlin 2015}) 9... axb4 10. Qa4 c5 11. a3 $1 {White is slightly better.} bxa3 12. Nxa3 {And now dxc5 would win.} Rc7 13. dxc5 bxc5 14. Rfd1 {[#]} d5 $146 ({Predecessor:} 14... Qe7 15. b4 d6 16. Nd3 cxb4 17. Nxb4 {½-½ (89) Nikolic,P (2596)-Turov,M (2539) Kusadasi 2006}) 15. e4 {[%cal Rc4d5]} d4 16. b4 Nfd7 17. Nxd7 Qxd7 18. Qxd7 Nxd7 19. bxc5 Nxc5 20. e5 Nb3 21. Rab1 Na5 $1 22. Bf1 Bxc4 23. Rdc1 {[%cal Ra3c4]} d3 $1 ({Of course not} 23... Rfc8 $6 24. Rb4 $16) 24. Bxd3 Bxd3 25. Rxc7 Bxb1 26. Nxb1 $11 {[%mdl 4096] Endgame KRN-KRN} Nb3 27. Nc3 Nd4 28. Kg2 f6 29. exf6 Rxf6 30. Rd7 Nf5 31. Ne4 Rf8 32. Nc5 Re8 33. g4 Nh4+ 34. Kg3 Ng6 35. f4 Nf8 {Threatens to win with ...Rc8.} 36. Rc7 h6 37. h4 Ra8 38. h5 Ra3+ 39. Kf2 Rh3 (39... Ra2+ $11 {keeps the balance.} 40. Ke3 Ra3+ 41. Kf2 Ra2+ 42. Kg3 Ra3+ 43. Kg2 Ra2+ 44. Kf3 Ra3+ 45. Kg2 Ra2+ 46. Kg3 Ra3+) 40. Re7 $16 Rc3 41. Ne4 ({Better is} 41. Nxe6 $16 Nxe6 42. Rxe6) 41... Rd3 $11 42. g5 {Strongly threatening gxh6.} Rd7 43. Re8 {Black must now prevent gxh6.} Kf7 44. Ra8 Ke7 45. Ke3 Rd1 46. g6 Rd5 47. Nf6 {[%mdl 64] Deflection, Decoy} Kxf6 48. Rxf8+ {KR-KR} Ke7 49. Rf7+ {[%mdl 64] Double Attack} Kd6 $2 {[%mdl 8192]} (49... Ke8 $14) 50. Rxg7 $18 Rxh5 {[#]} 51. Rd7+ $1 {[%mdl 576] Clearance, Promotion} Kxd7 {KR-KPP} 52. g7 Rh3+ 53. Kf2 Rh4 54. Kg3 (54. g8=Q $142 Rxf4+ 55. Ke3) 54... Rh1 55. Kg2 Rh4 56. g8=Q Rxf4 {KQ-KR} 57. Qg7+ Kd6 58. Qxh6 Rf5 59. Qg7 Kd5 60. Kg3 Kd6 61. Kg4 Kd5 62. Qc7 Kd4 63. Qd6+ {[%mdl 64] Double Attack} Rd5 64. Qxe6 Re5 65. Qc6 Rc5 66. Qb6 Kd5 67. Kf5 Kd4+ 68. Ke6 {White wants to mate with Kd6.} Kc4 69. Kd6 Rd5+ 70. Kc6 Re5 71. Qa6+ Kd4 72. Qa2 Rf5 73. Qb2+ (73. Qd2+ $142 Ke4 74. Qc2+ Ke5 75. Qc4 Rg5 76. Kc5 Rg3 77. Qd4+ Kf5 78. Kd5) 73... Ke4 74. Kd6 Rg5 75. Qc2+ Kf4 76. Ke6 Re5+ 77. Kf6 Re3 78. Qf5+ Kg3 79. Kg5 Kg2 80. Kh4 (80. Qf4 $142 Re8 81. Qd4 Kf1 82. Kg4 Ke2 83. Qc4+ Kd2 84. Qb4+ Kc1 85. Qc4+ Kd2 86. Qd5+ Kc3 87. Qc6+ Kb3 88. Qxe8) 80... Kg1 81. Qf4 {White mates.} Re2 82. Kh3 Ra2 83. Qg4+ Kf1 84. Qc4+ Re2 85. Kg3 Ke1 86. Qc1# {Accuracy: White = 71%, Black = 55%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.21"]
[Round "2.5"]
[White "Dominguez Perez, Leinier"]
[Black "Shankland, Samuel"]
[Result "1/2-1/2"]
[ECO "B48"]
[WhiteElo "2739"]
[BlackElo "2731"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,59,25,14,12,17,17,6,5,5,6,14,8,10,20,0,28,0,31,0,48,49,40,41,47,44,175,0,0,-39,-24,-48,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 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 Be7 {B48: Sicilian: Taimanov: 5 Nc3 Qc7 6 Be3 a6 without Be2} 9. f3 (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}) 9... b5 10. g4 Nxd4 11. Bxd4 Bb7 12. Kb1 O-O 13. Rg1 Rac8 $146 ({Predecessor:} 13... e5 14. Be3 d5 15. g5 Nxe4 16. fxe4 {½-½ (32) Thierry,R (2323)-Legemaat,G (2313) ICCF email 2014}) 14. h4 Rfd8 15. Bh3 Ne8 16. g5 Bc5 17. h5 Bxd4 18. Qxd4 Qc5 19. Qd2 d5 ({Black should try} 19... Rc6 $14) 20. e5 $2 (20. g6 $18 dxe4 21. gxf7+ Kxf7 22. Qf4+ Nf6 23. fxe4 Rxd1+ 24. Rxd1 Bxe4 25. Rd7+ Kg8 26. Bxe6+ Kh8 27. Rd1) 20... d4 $11 21. g6 dxc3 ({But not} 21... Qxe5 $6 22. gxf7+ Kxf7 23. Ne2 $14) 22. gxf7+ Kxf7 23. Qf4+ {The position is equal.} Ke7 $1 {[#] ...Rd5 is the strong threat.} 24. Qg5+ Kf7 $1 25. Qf4+ Ke7 $1 {Hoping for ...Rd5.} 26. Qg5+ Kf7 $1 27. Qf4+ Ke7 $1 {[#] And now ...Rd5 would win.} 28. Qg5+ Kf7 $1 29. Qf4+ Ke7 $1 {Strongly threatening ...Rd5.} 30. Qg5+ {Accuracy: White = 74%, Black = 62%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.21"]
[Round "2.6"]
[White "Sevian, Samuel"]
[Black "Liang, Awonder"]
[Result "1-0"]
[ECO "B18"]
[WhiteElo "2642"]
[BlackElo "2590"]
[Annotator "TA"]
[PlyCount "153"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,153,19,41,42,38,26,25,17,75,77,96,90,75,81,83,76,96,98,87,79,168,112,187,192,191,191,181,150,136,47,47,63,68,0,74,0,75,66,68,54,92,103,403,65,65,62,199,51,54,62,193,110,110,105,104,84,68,0,92,37,55,22,54,62,85,85,87,52,34,0,5,5,9,6,34,34,58,61,79,62,66,66,75,45,57,32,70,36,70,37,397,406,793,439,431,431,429,395,406,579,527,529,493,471,1035,839,1371,1381,1392,6705,29978,29979,29978,29979,29978,29980,29978,29980,29973,29974,29984,29985,29987,29988,29988,29989,29989,29990,29990,29991,29991,29990]} 1. e4 c6 2. d4 d5 3. Nd2 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Nf3 e6 8. Ne5 Bh7 9. Bd3 Bxd3 10. Qxd3 Nd7 11. Bf4 Ngf6 12. O-O-O Be7 13. Qf3 {[#] B19: Classical Caro-Kann: 4...Bf5 main line} Qa5 $146 ({Predecessor:} 13... O-O 14. c4 Qb6 15. Nxd7 Nxd7 16. Nh5 Kh8 17. Kb1 c5 18. Be3 e5 19. Qg4 Qg6+ 20. Qxg6 fxg6 21. dxc5 Nxc5 {1-0 (59) De Firmian,N (2536)-Yermolinsky,A (2574) Seattle 2002}) 14. Kb1 Qd5 15. Qe2 {White has an edge.} b5 (15... Rd8 $1 $11 {remains equal.}) 16. f3 $16 b4 17. Rhe1 O-O 18. Ne4 $1 Rac8 19. g4 Qb5 20. Nxd7 Nxd7 21. Qg2 Kh8 (21... Rcd8 $16) 22. Qd2 ({Better is} 22. g5 $18) 22... Rfd8 (22... Nb6 $16 {keeps fighting.}) 23. Bd6 $18 Bf8 24. Qf4 Kg8 25. g5 h5 26. Bc7 (26. Bxf8 $1 $16 Rxf8 27. Qd6) 26... Re8 $1 $14 27. Be5 $36 {[%mdl 2048] White has the initiative.} Red8 $1 28. Bc7 Re8 $1 29. Ng3 (29. g6 $16 f6 30. Bd6) 29... Nb6 (29... c5 $1 $11 30. dxc5 (30. Nxh5 cxd4 31. Be5 Nxe5 $11) 30... Bxc5) 30. Bxb6 $1 $16 axb6 31. Nxh5 {Threatens to win with Re5.} Red8 32. Re5 Rd5 $2 {[%mdl 8192]} (32... Bd6 $16 {was worth a try.} 33. Rxb5 Bxf4) 33. Rg1 $2 (33. Nf6+ $1 $18 gxf6 34. gxf6) 33... Rxe5 $1 $14 34. dxe5 Qe2 {[#]} ({Black should try} 34... Bc5 $1 $14 35. g6 fxg6 36. Rxg6 {[%mdl 64] Double Attack} Qf1+ 37. Qc1 Qxc1+ 38. Kxc1 Rc7) 35. Qg4 (35. Nf6+ $1 $18 {[%mdl 512]} Kh8 (35... gxf6 36. gxf6+) 36. Qg4) 35... g6 36. Nf6+ Kh8 {[#]} (36... Kg7 $1 $14) 37. Qe4 (37. Qh3 $1 $18 {h5 would kill now.} Rd8 38. Qh1) 37... Qxe4 $16 38. Nxe4 {[%mdl 4096] Endgame KRB-KRN} ({Reject} 38. fxe4 Bc5 $11) 38... Rd8 39. Kc1 Ra8 40. Kb1 Rd8 $1 41. Re1 (41. Rc1 $16) 41... Kg7 42. b3 Be7 43. Kc1 Rh8 44. Rh1 b5 45. Kb2 Rd8 46. Kc1 Rd5 47. f4 Rd4 48. Re1 c5 49. Kb2 c4 50. bxc4 bxc4 51. Re3 Bf8 52. c3 Rd1 53. Nd6 Rd2+ $1 54. Kb1 b3 55. axb3 {Black must now prevent Ne8+.} cxb3 56. Re4 {And now Rd4 would win.} Rc2 $2 {[%mdl 8192] [#]} (56... Bxd6 $14 57. exd6 Rxd6) 57. Rc4 $1 $18 Rd2 (57... Rf2 $142 58. Rc7 Bxd6 59. exd6 Rd2) 58. Ne8+ Kg8 {Hoping for ...Ba3.} 59. Rc8 f5 60. Nd6 Kg7 61. Rc7+ Kg8 62. Rd7 Rf2 63. c4 Rxf4 (63... Rf1+ $142 64. Kb2 Rf2+ 65. Kxb3 Rf3+ 66. Kb2 Rf2+ 67. Kc3 Rf3+ 68. Kc2 Rxf4) 64. c5 Rf1+ 65. Kb2 f4 66. c6 {White wants to mate with c7.} f3 67. c7 {White mates.} f2 68. c8=Q Rb1+ 69. Kxb1 f1=Q+ 70. Kb2 Qe2+ 71. Kxb3 Qd1+ 72. Qc2 Qd5+ 73. Kb4 Qd4+ 74. Kb5 Qxe5+ 75. Ka6 Qa1+ 76. Kb7 Bg7 77. Ne4 {Accuracy: White = 56%, Black = 41%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.22"]
[Round "3.1"]
[White "Akobian, Varuzhan"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2625"]
[BlackElo "2762"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 30,80,11,11,15,11,9,8,9,12,36,34,24,7,4,16,22,5,22,18,18,18,22,10,12,0,0,0,0,0,0,-10,-9,-11,-4,-8,0,0,8,8,8,8,8,0,0,0,24,24,28,26,45,45,59]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Be3 c5 8. Rc1 Qa5 9. Qd2 O-O 10. Nf3 Rd8 11. d5 e6 12. Bg5 {D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3} f6 13. Be3 Nc6 14. h4 (14. Bd3 Ne7 15. c4 Qxd2+ 16. Bxd2 b6 17. O-O Ba6 18. Rfe1 Rac8 19. Bf1 exd5 20. exd5 {1-0 (46) Yu,Y (2759)-Svidler,P (2753) Shenzhen 2018}) 14... exd5 15. exd5 Bg4 16. Be2 {LiveBook: 4 Games} c4 17. Bxc4 Bxf3 18. gxf3 Ne5 $1 {[%csl LRc4,LRf3][%mdl 64] [#] Double Attack} 19. Be2 Qxd5 20. Qxd5+ Rxd5 21. Rd1 $146 (21. Kf1 {keeps more tension.} Rc8 22. c4 Rdd8 23. h5 f5 24. hxg6 hxg6 25. c5) 21... Rxd1+ 22. Bxd1 Rc8 23. h5 f5 24. Bb3+ Kf8 25. Ke2 b6 26. hxg6 hxg6 27. Rh7 Re8 28. Bc1 {[#] And now Ba3+ would win.} Nd7+ 29. Kd2 Nc5 30. Ba3 Re7 {Threatens to win with ...Bxc3+!} 31. Bxc5 bxc5 $11 {[%mdl 4096] Endgame KRB-KRB} 32. Kd3 Re1 33. Rh4 Rf1 34. Ra4 Be5 35. Rxa7 Rc1 36. Kc4 Rxc3+ 37. Kd5 c4 38. Bxc4 Bh2 39. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Bg1 40. a5 Bxf2 {Accuracy: White = 65%, Black = 56%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.22"]
[Round "3.2"]
[White "Nakamura, Hikaru"]
[Black "Sevian, Samuel"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2746"]
[BlackElo "2642"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,97,4,5,2,14,16,9,11,22,22,29,29,15,15,32,26,45,40,42,14,6,13,9,4,37,35,33,28,41,36,61,60,125,86,86,86,89,86,86,86,86,86,86,86,139,135,166,166,177,178,177,175,197,186,212,212,362,362,362,365,340,337,863,826,1120,1043,1354,1291,1184,1126,1192,1171,1172,1050,873,820,1238,1150,2108,1903,1651,1546,2640,1581,4614,5999,11870,10605,29966,29947]} 1. c4 e5 2. Nc3 Nf6 3. Nf3 Nc6 4. e4 Bb4 5. d3 d6 6. a3 {A28: English Opening: Four Knights Variation} Bc5 {Black wants to play ...Ng4.} 7. b4 Bb6 8. Na4 {The position is equal.} Bg4 9. Be2 Nd7 10. Nxb6 axb6 11. Bb2 O-O 12. h3 $146 ({Predecessor:} 12. O-O Re8 13. Nd4 Nxd4 14. Bxg4 {½-½ (40) Pantsulaia,L (2585)-Korobov,A (2668) Kocaeli 2017}) 12... Bxf3 13. Bxf3 Nd4 14. O-O Nxf3+ 15. Qxf3 Qg5 16. Rae1 Nb8 17. d4 Nc6 18. dxe5 dxe5 19. Rd1 Rfd8 20. Rd5 $1 Rxd5 (20... Qe7 $14) 21. cxd5 Nd4 22. Bxd4 exd4 $16 {[%mdl 4096] Endgame KQR-KQR} 23. Qd3 c5 24. dxc6 bxc6 25. Qxd4 c5 26. Qd6 cxb4 ({Better is} 26... h6) 27. axb4 $40 {[%cal Ba3b4,Bb4b5][%mdl 160] White attacks with force.} Qb5 28. Rc1 h6 29. Qc6 Qa6 30. b5 Qa5 31. Rd1 Rb8 32. Kh2 Qa2 (32... Qb4 $142 33. Rd5 Qe7) 33. Qc7 $18 Qa8 34. Rd7 Rf8 35. Qxb6 Qxe4 $2 {[#]} (35... Qb8+ 36. Rd6 Qxb6 37. Rxb6 Re8) 36. Qd6 Qe6 37. Qxe6 fxe6 {KR-KR} 38. b6 Kh7 39. b7 Kg6 40. Rc7 Rb8 41. Kg3 Kf5 42. Rxg7 Rd8 43. f3 e5 44. Rc7 {[#] White wants to mate with Rc8.} Rb8 45. Kf2 e4 46. fxe4+ Kxe4 47. Kg3 Kf5 48. Kh4 Kg6 49. Rc6+ {Accuracy: White = 95%, Black = 27%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.22"]
[Round "3.3"]
[White "Shankland, Samuel"]
[Black "Xiong, Jeffery"]
[Result "0-1"]
[ECO "C44"]
[WhiteElo "2731"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,82,-1,11,0,9,0,4,22,26,-55,-31,-45,-33,-93,-91,-122,-109,-125,-101,-123,-114,-102,-61,-259,-287,-261,0,0,0,0,0,0,0,-93,-41,-64,-47,-64,-60,-270,0,0,0,-231,-225,-903,-912,-847,-814,-784,-316,-1166,-1161,-1147,-1146,-1131,-179,-185,0,-1127,-1050,-1347,-1345,-5497,0,0,0,-5473,-386,-384,-391,-387,-383,-29993,-29994]} 1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Qf6 5. Nb3 Qg6 6. f3 {C45: Scotch Game} Nf6 (6... Bd6 7. g4 h5 8. g5 f6 9. Nc3 fxg5 10. Rg1 g4 11. f4 Nge7 12. Be3 O-O 13. Qd2 {1-0 (27) Nepomniachtchi,I (2763)-Cheparinov,I (2709) St Petersburg 2018}) 7. Bf4 Bb4+ 8. Kf2 $146 {Threatening Bd3.The position is equal.} ({Predecessor:} 8. c3 Be7 9. Qd2 d6 10. c4 Nh5 11. Be3 Ne5 12. Nc3 Be6 13. Nb5 {0-1 (62) Tagelsir,A (2232)-Saeed,I (2434) Sharjah 2018}) 8... O-O 9. a3 ({White should play} 9. Bd3 $11 Ne8 10. a3) 9... Be7 $15 10. Bd3 Nh5 $1 {[%cal Rh5f4]} 11. Bxc7 ({White should try} 11. Be3 $15) 11... d6 $17 12. e5 Bh4+ $1 (12... Qg5 13. exd6 Bf6 14. Nc3 $16 (14. d7 Bxd7 15. Nc3 Rac8 $11)) 13. Kf1 (13. g3 $6 Bxg3+ 14. hxg3 Qxg3+ 15. Ke3 Qxe5+ 16. Be4 Qg5+ 17. Kf2 Qg3+ 18. Ke3 Qg5+ 19. Kf2 Qg3+ 20. Ke2 Nf4+ 21. Kd2 f5 $11) 13... Qh6 $1 14. exd6 (14. Bxd6 $6 Re8 $14) 14... Re8 (14... Qe3 15. Qd2 $18) 15. Nc3 Ne5 (15... Qe3 $2 16. Qe2 $18) 16. Nc5 $2 (16. Bb5 $15 Bd7 17. Bxd7 Nxd7 18. g3) 16... Nxf3 $1 $19 (16... Qe3 17. N5e4 $11) 17. N3e4 Bg4 $2 (17... f5 $19 18. Qxf3 fxe4 19. Bxe4 Nf6) 18. d7 $11 (18. gxf3 Bh3+ 19. Ke2 Nf4+ 20. Ke3 Ne6+ 21. Ng5 Qxg5+ 22. Ke4 Qxc5 23. Rg1 Bf5#) 18... Re5 $40 {[%mdl 128] Black is up to no good.} 19. Bxe5 Nxe5 20. Qd2 {Threatens to win with Qxh6.} Qc6 $1 {White must now prevent ...f5.} 21. h3 {[#]} (21. Qe3 $11) 21... Bxd7 (21... Bf5 $1 $17 22. Qe2 Qh6) 22. Nxd7 $15 Nxd7 23. Qc3 Qh6 {Hoping for ...Re8.} 24. g4 $2 {[#]} ({Better is} 24. g3 $15 Bxg3 25. Be2) 24... f5 $2 (24... Ng3+ 25. Nxg3 Qf4+ 26. Ke2 $16) (24... Qf4+ $1 $19 25. Kg2 Ndf6 26. Nxf6+ gxf6 27. Bxh7+ Kxh7) 25. gxf5 $11 {aiming for Rg1.} Re8 ({And not} 25... Qf4+ 26. Kg2 $16 (26. Kg1 Qe3+ 27. Kf1 Qf3+ 28. Kg1 Qe3+ 29. Kf1 Qf3+ 30. Kg1 Qe3+ $11)) 26. Qc4+ $2 (26. Rh2 $1 $11) 26... Kh8 $19 {And now ...Ne5 would win.} 27. Rg1 $2 (27. Rh2 Ng3+ 28. Kg2 Nxe4 29. Bxe4) 27... Qe3 28. Rg2 Nf4 {[%mdl 64] Double Attack} 29. Rh2 Nxh3 (29... Bg3 $142 30. Nxg3 Qxg3 {[%mdl 64] Double Attack}) 30. Kg2 $2 (30. Nf2 Bxf2 31. Qg4) 30... Nf4+ 31. Kh1 Qf3+ 32. Kg1 Qg4+ $2 (32... Bd8 33. Qd4 {[%mdl 64] Double Attack} Ne5) 33. Kh1 Qf3+ $2 (33... Ne5 34. Qb5 (34. Be2 $2 Nxe2 35. Qxe2 Nf3 $19) 34... Qf3+ {[%mdl 64] Double Attack} 35. Kg1 Nc6) 34. Kg1 Bd8 35. Rf1 Bb6+ 36. Nf2 Qg3+ 37. Kh1 {Strongly threatening Ne4.} Qf3+ 38. Kg1 Nh3+ $2 (38... Nf6 {( -> ...Ng4)} 39. Qf7 Bxf2+ {[%mdl 64] Overworked Piece} 40. Rfxf2 Re1+ 41. Rf1 Qg3+ 42. Kh1 Nxd3 43. Qf8+ Ng8 44. Rxe1 Qxe1+ 45. Kg2 Qf2+ {[%mdl 64] Double Attack} 46. Kh3 Nf4+ 47. Kg4 Qxh2) 39. Rxh3 Qxh3 40. Qf4 Nf6 41. Bb5 $2 (41. Qh2 $19 Qxh2+ {[%mdl 64] Overworked Piece} 42. Kxh2 Bxf2 43. Rxf2 Ng4+ {[%mdl 64] Double Attack} 44. Kg3 Nxf2 45. Kxf2) 41... Re4 {Accuracy: White = 39%, Black = 55%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.22"]
[Round "3.4"]
[White "Liang, Awonder"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "B22"]
[WhiteElo "2590"]
[BlackElo "2828"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,68,33,25,27,26,26,29,34,27,24,41,50,49,49,49,42,43,34,39,58,50,50,55,36,45,33,37,39,48,13,43,-29,0,0,0,0,0,0,0,0,11,10,10,10,18,18,17,17,18,0,18,0,0]} 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Nf3 e6 5. d4 cxd4 6. cxd4 d6 7. Bc4 Nb6 8. Bd3 Nc6 9. O-O Nb4 10. Bg5 {B22: Sicilian: 2 c3} Be7 11. Bxe7 Qxe7 12. Nc3 {White has an edge.} dxe5 13. dxe5 Nxd3 14. Qxd3 Bd7 (14... O-O 15. Qe4 Rb8 16. Nb5 Bd7 17. Nxa7 Ra8 {0-1 (47) Boruchovsky,A (2531)-Naiditsch,A (2667) Jerusalem 2016}) 15. Ne4 O-O $1 16. Nd4 Rad8 17. Rad1 $146 ({Predecessor:} 17. Nd6 f6 {½-½ (27) Hayward,K (2142)-Tesic,Z ICCF email 2004}) 17... Bc6 18. Nxc6 bxc6 19. Nd6 Nd5 20. Qc2 f6 21. Qxc6 fxe5 22. Ne4 Rc8 23. Qa4 Rb8 24. Nc3 (24. b3 $14) 24... Rxb2 (24... Nf4 $5 {[%cal Re7g5]} 25. Qc2 Qb7 $15) 25. Nxd5 {The position is equal.} exd5 26. Rxd5 Qf7 {[%cal Rb2f2]} 27. Rd7 Rxa2 28. Qb5 a6 29. Qb1 Qxd7 30. Qxa2+ {[%mdl 64] [#] Double Attack} Qf7 31. Qxa6 h6 32. Qe2 Qf5 33. Qe3 Qf4 34. Qxf4 exf4 {Accuracy: White = 63%, Black = 74%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.22"]
[Round "3.5"]
[White "Robson, Ray"]
[Black "Dominguez Perez, Leinier"]
[Result "0-1"]
[ECO "C65"]
[WhiteElo "2667"]
[BlackElo "2739"]
[Annotator "TA"]
[PlyCount "102"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,102,18,17,11,18,23,21,1,23,12,14,0,18,12,18,0,0,0,0,-23,-13,-17,-6,-14,-13,-12,-4,-40,-40,-42,-47,-83,-75,-120,-43,-61,-40,-57,-15,-25,-24,-46,-32,-42,-36,-40,-30,-79,-86,-102,-105,-116,-97,-116,-101,-143,-125,-130,-97,-148,-133,-141,-141,-141,-133,-219,-217,-208,-201,-178,-178,-837,-555,-616,-452,-29967,-29968,-29967,-29969,-29969,-29971,-29970,-29971,-29976,-29978,-29979,-29980,-29980,-29981,-29981,-29982,-29982,-29982,-29982,-29983]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Bxc6 dxc6 6. Nbd2 {[%cal Bb1d2,Bd2b3,Bb3a5,Ba5c4][%mdl 32] C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5} (6. O-O {keeps more tension.} Nd7 7. c3 O-O 8. Qc2 b6 9. Re1) 6... Be6 7. O-O Bd6 8. Nb3 {The position is equal.} (8. b3 O-O 9. Nc4 Nd7 10. a4 Bxc4 11. bxc4 a5 12. Bg5 Be7 13. Be3 b6 {½-½ (52) Caruana,F (2828)-Nakamura,H (2749) chess.com INT 2019}) 8... Qe7 9. Na5 $146 ({Predecessor:} 9. Qe1 h6 10. Na5 Rb8 11. d4 exd4 12. e5 Bb4 13. Bd2 Bxa5 14. Bxa5 {½-½ (24) Saric,I (2678)-Fressinet,L (2702) Germany 2016}) 9... O-O-O 10. Bd2 Bg4 11. Rb1 Nd7 12. Nc4 Qf6 13. b4 Nf8 14. h3 Bxf3 $1 15. Qxf3 Qxf3 16. gxf3 Ne6 17. Be3 Rhf8 18. c3 ({Much weaker is} 18. Bxa7 b6 $17) 18... f5 19. Rfd1 Rf6 20. d4 exd4 21. cxd4 fxe4 (21... Bf4 $17 22. Kg2 fxe4 23. fxe4 Rdf8) 22. Nxd6+ $15 cxd6 23. fxe4 d5 24. e5 Rf5 25. b5 {[#]} c5 $1 {[%mdl 512]} 26. dxc5 d4 27. Bd2 Nxc5 28. b6 axb6 29. Rxb6 Rxe5 30. Rc1 Rdd5 31. Rb5 Kd7 32. Ba5 d3 33. Kf1 d2 34. Bxd2 ({White should try} 34. Rd1) 34... Rxd2 $17 35. Rcxc5 Rxc5 36. Rxc5 Rxa2 {[%mdl 4096] Endgame KR-KR} 37. Rh5 (37. h4 $17) 37... h6 $19 38. Rf5 {[#]} Kc6 $1 39. Rf7 {[#]} b5 $1 {[%cal Bb7b5,Bb5b4,Bb4b3][%mdl 32]} 40. Rxg7 $2 (40. Ke1) 40... b4 41. Rg3 Kb5 42. Kg2 (42. Ke1 $19 Kc4 43. Kd1) 42... Ra3 {Black mates.} 43. Rg8 Ra6 44. Kf3 b3 45. Rg1 Kb4 46. Ke4 b2 47. Rb1 Kc3 48. f4 Ra1 49. Rxb2 Kxb2 50. f5 Rf1 51. Ke5 Rh1 {Accuracy: White = 40%, Black = 65%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.22"]
[Round "3.6"]
[White "Gareyev, Timur"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "E46"]
[WhiteElo "2557"]
[BlackElo "2637"]
[Annotator "TA"]
[PlyCount "151"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,151,0,0,0,0,0,0,0,0,0,0,0,0,0,11,13,138,0,0,-14,0,11,17,20,18,0,-8,0,-4,-8,-3,-19,-8,-13,0,0,0,0,0,0,0,0,0,-8,0,0,0,-11,-11,-26,-25,-24,0,0,0,-16,0,0,0,0,0,0,0,0,0,-33,0,-46,-35,-50,-44,-115,-115,-145,-143,-155,-107,-97,-85,-152,-152,-149,-147,-151,-125,-131,-131,-131,-131,-131,-131,-178,-178,-178,-178,-154,-115,-115,-115,-125,-125,-125,-125,-125,-125,-125,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123,-123]} 1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 c5 6. Bd3 cxd4 7. exd4 d5 8. cxd5 exd5 9. Nge2 {E46: Nimzo-Indian: Rubinstein: 4 e3 0-0 5 Ne2 without early Bd3} Nc6 10. O-O Bd6 $146 ({Predecessor:} 10... Bg4 11. Bg5 Be7 12. Qb3 Na5 13. Qc2 h6 14. Bh4 Qd7 15. h3 Be6 16. Rad1 Nc4 {1-0 (42) Glenne,B (2235)-Gronn,A (2370) Oslo 2002}) 11. h3 {The position is equal.} h6 12. Rc1 Re8 13. Be3 a6 14. a3 Bc7 15. Re1 Nh5 (15... Be6 $11) 16. Qd2 $2 (16. Nxd5 $1 $16 Qxd5 17. Nc3) 16... Qd6 $11 {[#]} 17. Nf4 $1 {[%mdl 512]} Nf6 ({Wrong is} 17... Nxf4 $2 18. Bxf4 Qf8 19. Bxc7 $18) 18. g3 Bd7 19. Bf1 Bf5 20. Nd3 Bb6 21. Nc5 Bxc5 22. dxc5 Qd7 23. Bd4 $1 {[%cal Rd4f6]} Ne4 24. Nxe4 dxe4 25. Bc3 Bxh3 26. Qxd7 Bxd7 27. Bg2 Bf5 28. Rcd1 Re7 29. Rd5 Bg6 30. Bh3 f6 31. b4 Na7 32. a4 Be8 33. Ra1 e3 34. Rd3 exf2+ 35. Kxf2 Bc6 36. Bg4 Rf8 37. Bf5 Kf7 38. Rd6 Rfe8 39. Bg4 Kg6 40. Bd2 Re5 41. Ra3 Nc8 42. Rd4 Ne7 43. Bd1 (43. Bf4 $15) 43... Nf5 $36 {[%mdl 2048] Black is really pushing.} 44. Rg4+ {[#]} Kh7 $1 {...Rd5 is the strong threat.} 45. Rd3 h5 46. Rc4 Nh6 47. Rcd4 {[#]} (47. Rh4 $142) 47... Ng4+ $1 {[%mdl 512]} 48. Bxg4 hxg4 49. Re3 Rf5+ 50. Ke1 Rxe3+ 51. Bxe3 {[%mdl 4096] Endgame KRB-KRB} Rf3 52. Bf2 f5 53. b5 axb5 54. axb5 Bxb5 55. Rf4 Rxf4 56. gxf4 {KB-KB. Black is better.} Kg6 57. Bg3 Kf6 58. Bh4+ Ke6 59. Kf2 Kd5 60. Be7 {[#]} g5 $1 61. Kg3 (61. Bxg5 Kxc5) 61... gxf4+ 62. Kxf4 Bd7 63. Bf8 Bc8 64. Be7 Ke6 65. Bf8 Bd7 66. Bh6 Bc6 67. Bf8 Be4 68. Bh6 Kd5 69. Bf8 Kd4 70. Bd6 Kd3 71. Kg3 Bc6 72. Bf8 Ke4 {Threatens to win with ...f4+.} 73. Bd6 Bd7 74. Bf4 Kd4 75. Bd6 Kd5 {Hoping for ...b5.} 76. Bf8 {Accuracy: White = 75%, Black = 73%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.23"]
[Round "4.1"]
[White "Xiong, Jeffery"]
[Black "Robson, Ray"]
[Result "0-1"]
[ECO "C67"]
[WhiteElo "2663"]
[BlackElo "2667"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,90,5,0,0,0,18,0,0,-8,-12,-13,-11,-32,-38,-126,-82,-110,-104,-87,-90,-120,-102,-178,-142,-251,-23,-22,-20,-25,-16,-21,-22,-19,-33,-39,-25,-60,-60,-60,-60,-89,-36,-49,0,0,0,-56,-66,-406,-415,-424,-427,-420,-417,-475,-468,-543,-545,-532,-447,-450,-436,-440,-437,-488,-486,-705,-677,-922,-902,-778,-778,-539,-536,-522,-522]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. dxe5 Nxb5 7. a4 Nbd4 8. Nxd4 Nxd4 9. Qxd4 d5 $1 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4} 10. Qd3 g6 11. Nc3 c6 {The position is equal.} 12. Be3 Bf5 13. Qd2 Qa5 {[#]} 14. Rfe1 $146 ({Predecessor:} 14. Bg5 Bg7 15. Rfe1 O-O 16. Be7 Rfe8 17. Bd6 {0-1 (50) Guseinov,G (2611)-Balogh,C (2608) Khanty-Mansiysk 2010}) 14... O-O-O {Strongly threatening ...d4.} 15. e6 ({White should try} 15. Qd4 $15) 15... Bxe6 16. Bg5 Rd7 17. Bf6 Rg8 18. Qe3 Bb4 19. Red1 (19. Qh6 $17) 19... Bf5 $19 20. Nb5 (20. Qf4 $17 {was called for.}) 20... Bxc2 $2 (20... cxb5 $19 21. axb5 Qxb5 22. Rxa7 Kc7) 21. Rdc1 $11 Bf5 22. Nxa7+ Kb8 {[%mdl 64] [#] Trapped Piece} 23. Nb5 Ka8 {Threatens to win with ...d4.} 24. Bc3 Bxc3 25. bxc3 Be6 26. Re1 Re8 27. h3 h5 $36 {[%mdl 2048] Black fights for an advantage.} 28. Kh2 {[#]} Rde7 (28... f6 $1 $17) 29. Qc5 $15 Kb8 30. Qd6+ $1 Kc8 31. Qc5 (31. Kg1 $11) 31... Kd8 $1 32. g3 $2 {[%mdl 8192]} (32. c4 $1 $15 cxb5 33. cxd5 Qc7+ 34. Qxc7+ Kxc7 35. Rec1+ Kb8 36. dxe6) 32... cxb5 $19 33. axb5 Qc7 34. Qd4 Kd7 35. Ra4 Rc8 {Black is clearly winning.} 36. c4 Qc5 37. cxd5 Bf5 38. Rxe7+ Kxe7 39. Qe5+ Kd7 40. Rf4 Qd6 41. Qxd6+ (41. Rxf5 $142 gxf5 42. Qxf5+ Kc7 43. Qxf7+ Kb6 44. Qxh5) 41... Kxd6 42. g4 Ke5 43. Rf3 hxg4 44. hxg4 Bxg4 45. Rxf7 Rb8 {Accuracy: White = 28%, Black = 82%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.23"]
[Round "4.2"]
[White "Caruana, Fabiano"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "E06"]
[WhiteElo "2828"]
[BlackElo "2739"]
[Annotator "TA"]
[PlyCount "170"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,170,0,0,0,0,22,16,8,0,0,0,0,2,8,4,7,0,9,0,17,10,0,0,18,4,19,18,21,21,24,15,20,13,20,15,20,0,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,173,131,131,109,109,109,109,109,129,123,343,322,308,302,508,457,510,501,465,85,90,26,26,26,26,26,56,56,74,76,285,276,275,271,263,270,252,237,225,220,216,219,225,216,410,428,427,415,346,293,400,328,335,264,161,325,161,122,300,54,220,223,260,260,304,180,792,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 Be7 5. Nf3 O-O 6. O-O dxc4 7. Qa4 a6 8. Qxc4 b5 9. Qc2 Bb7 10. Bd2 Be4 11. Qc1 c6 {E05: Open Catalan: 5 Nf3 Be7} (11... 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}) 12. a4 Nbd7 13. Nc3 Bg6 14. Nh4 Bh5 {[#]} 15. h3 $146 ({Predecessor:} 15. axb5 axb5 16. Nf3 Qb6 17. e3 Rac8 18. Qb1 c5 19. dxc5 Nxc5 20. b4 Na6 21. Ra5 Nxb4 22. Rxb5 Qd8 23. Rd1 Rb8 24. Be1 {½-½ (24) Smirin,I (2655)-Lysyj,I (2671) Poikovsky 2015}) 15... Nd5 16. axb5 axb5 17. Rxa8 Qxa8 18. e4 Nb4 19. Bg5 Qd8 20. Bxe7 Qxe7 21. Qe3 Rd8 22. Rc1 Nf8 (22... h6 {keeps more tension.} 23. f4 Nb6 24. b3 Nd7 25. e5 Nb6) 23. Bf3 Bxf3 24. Nxf3 Nd7 25. Kg2 h6 26. h4 Nb6 27. b3 Nd7 28. Rd1 Ra8 29. Qe2 Nf6 30. Ne5 Nd7 31. Ng4 Nf6 32. Ne3 Ra3 33. e5 Nd7 34. Ne4 Nb6 35. Qh5 Rxb3 36. Ng4 N4d5 37. Ra1 Ra3 $2 (37... Rd3 $11 {and Black has nothing to worry.}) 38. Nxh6+ gxh6 {[#]} 39. Nf6+ $1 {[%mdl 512]} Nxf6 40. exf6 {[#]} Rxg3+ $1 {[%mdl 512]} 41. fxg3 Qxf6 $16 {[%mdl 4096] Endgame KQR-KQN} 42. Qg4+ $1 Kh8 $2 (42... Qg7 $16 43. Qxg7+ Kxg7) 43. Ra6 $18 Qd8 44. Ra7 $1 {[%cal Ra7f7]} Qf8 $2 (44... Nc4 {was necessary.} 45. Qf4 Nd6 46. Qxh6+ Kg8) 45. Qf3 Kg8 46. Qxc6 {[%mdl 64] Double Attack} Qd8 {Black hopes to continue with ...Qd5+.} 47. Kh2 $2 (47. Qf3 $18 {is the precise move to win.} Qd5 48. Rb7 Qxf3+ 49. Kxf3) 47... Qf6 $16 48. Qe4 ({Much weaker is} 48. Qxb6 $6 Qf2+ 49. Kh3 Qf1+ 50. Kh2 Qf2+ 51. Kh1 Qf1+ 52. Kh2 Qf2+ $11) (48. Ra2 $16 Qxd4 49. Qxb5) 48... Qf2+ $11 49. Kh3 Qf1+ 50. Qg2 Qf5+ 51. g4 Qd3+ 52. Qg3 Qxd4 $2 (52... Qf1+ $16 {is a better defense.} 53. Kh2 Qf6) 53. g5 $18 h5 {With the idea ...Nd5.} 54. g6 $1 {[%cal Rg6f7]} Nd7 55. Ra8+ $1 Kg7 56. gxf7+ Kxf7 57. Qg8+ $1 Ke7 58. Re8+ Kd6 59. Rxe6+ Kc5 $2 (59... Kd5 {might work better.} 60. Rh6+ Kc5 61. Rxh5+ Ne5 62. Qf8+ Kc4 63. Qf1+ Qd3+ 64. Qxd3+ Nxd3) 60. Qg5+ Kb4 61. Qxh5 Nc5 62. Re7 Nd3 {White must now prevent ...Nf4+.} 63. Qf3 Kc3 64. h5 b4 {intending ...b3.} 65. h6 $1 b3 66. h7 b2 {[#]} 67. Rb7 $2 (67. Qf1 $1 $18 Kb3 68. Rb7+ Kc3 69. Qf5) 67... Kd2 $2 (67... b1=R $14 68. Rxb1 Qd7+ 69. Kg2 Qxh7) 68. Qg2+ Kc1 {[#] Hoping for ...Nf4+.} 69. Rc7+ $1 Kb1 70. Qh1+ (70. Qg7 $142 Qe3+ 71. Qg3 Qe6+ 72. Kh2 Qe2+ 73. Qg2 Qe5+ 74. Kh1 Qxc7 75. h8=Q) 70... Nc1 $2 (70... Ka2 71. Qa8+ Kb1) 71. Qa8 $2 (71. Re7 $18) 71... Qe3+ $11 {The position is equal.} 72. Kg4 Qe6+ 73. Kf3 {Intending Qe4+ and mate.} Qe2+ 74. Kg3 Qe5+ 75. Kh3 Qh5+ 76. Kg2 $1 Qe2+ 77. Kh1 Qh5+ 78. Kg1 Qd1+ 79. Kh2 Qh5+ 80. Kg3 Qe5+ 81. Kg4 Qe6+ 82. Kh5 Qf5+ 83. Kh4 Qf4+ 84. Kh5 Qf5+ 85. Kh4 Qf4+ {Accuracy: White = 58%, Black = 60%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.23"]
[Round "4.3"]
[White "So, Wesley"]
[Black "Shankland, Samuel"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2762"]
[BlackElo "2731"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,62,27,20,18,30,17,12,16,9,6,0,0,0,-9,-5,0,-6,-13,-14,0,0,0,-10,12,0,0,-6,-8,-9,0,0,-3,-19,-21,-46,-21,-27,-27,-40,0,-34,0]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 c5 6. Be3 cxd4 7. Nxd4 Ne7 8. Nd2 {B12: Caro-Kann: Advance Variation} Nbc6 9. N2f3 Bg4 10. O-O Bxf3 11. Nxf3 Qc7 12. c4 {LiveBook: 9 Games} dxc4 13. Bxc4 Nf5 14. Bf4 Be7 15. Bd3 {With the idea Bxf5.} O-O {[#]} 16. Be4 $146 Rfd8 17. Qc2 g6 18. Rfd1 Qb6 19. Bxc6 bxc6 20. Rac1 Rxd1+ 21. Rxd1 Rd8 22. b3 (22. Rxd8+ {feels hotter.} Qxd8 23. Qd2 Qa8 24. g4 c5 25. Qd1) 22... Bc5 23. Rxd8+ Qxd8 24. h3 Qd5 25. Qe2 Nd4 26. Nxd4 Bxd4 27. Kh2 h5 28. Bg3 Kg7 29. Bf4 Qc5 30. Bg3 Qd5 31. Bf4 Qc5 {Precision: White = 36%, Black = 65%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.23"]
[Round "4.4"]
[White "Liang, Awonder"]
[Black "Nakamura, Hikaru"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2590"]
[BlackElo "2746"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,62,0,0,0,0,0,0,0,14,12,5,5,0,13,16,17,22,10,9,0,0,0,29,26,31,24,35,37,33,42,42,39,37,30,37,28,35,35,35,35,35,35,35,35,35,27,27]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb6 9. Nc3 O-O 10. Be3 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} Bg4 11. h3 Bh5 12. Qc2 {The position is equal.} Bg6 {[#] Strongly threatening ...Nxc3.} 13. Qb3 Ne7 14. O-O c6 15. Bd3 Nd2 16. Nxd2 {[#] Threatens to win with Bxg6.} Bxd3 17. Rfe1 Bg6 {[#]} 18. Nf3 $146 Nf5 19. Na4 f6 20. Nxb6 Qxb6 21. Qc3 Rae8 22. Bf4 fxe5 23. Bxe5 Qd8 24. Re2 Rf7 25. Rae1 Rfe7 26. Qd2 Nh6 27. Bf4 Nf7 28. Rxe7 Rxe7 29. Ne5 Nxe5 30. Bxe5 Qd7 31. Re3 h6 {Accuracy: White = 76%, Black = 69%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.23"]
[Round "4.5"]
[White "Lenderman, Aleksandr"]
[Black "Akobian, Varuzhan"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2637"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,75,18,14,14,24,15,10,20,-11,3,6,14,0,0,-24,-16,-45,-35,-42,-38,-27,-16,-44,-8,-8,-8,-8,-8,-10,-8,-8,-8,-8,-8,-8,-6,-8,-8,-32,-37,-34,-26,-20,-10,-11,0,0,0,0,0,-45,-44,-45,0,0,0,0,0,0,0,0,0,0,-8,-30]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. Be2 dxc4 {D37: Queen's Gambit Declined: 5 Bf4} 8. O-O c5 (8... a6 9. a4 c5 10. dxc5 Nxc5 11. Bxc4 Qxd1 12. Rfxd1 Bd7 13. Ne5 Rfd8 14. Nxd7 Rxd7 15. Kf1 {½-½ (30) Vidit,S (2711)-Safarli,E (2676) Porto Carras 2018}) 9. dxc5 Nxc5 10. Qc2 a6 11. Rfd1 Qe8 12. Bxc4 $146 ({Predecessor:} 12. a4 Bd7 13. Ne5 Nb3 14. Ra2 Na5 15. Bxc4 Rc8 16. Nxd7 Nxd7 {½-½ (49) Cacho Reigadas,S (2523)-Minzer,C (2430) Ibiza 2012}) 12... b5 13. Be2 Bb7 14. a3 Rc8 15. Rac1 Na4 {Threatens to win with ...Bxa3!} 16. Qb3 $1 Nxc3 17. bxc3 Nd5 18. Be5 Nb6 19. c4 {[%cal Rc4b5]} Bxf3 20. gxf3 {[%cal Rc4b5]} Nxc4 21. Bxc4 bxc4 22. Rxc4 Qb5 23. Qxb5 axb5 24. Rxc8 Rxc8 $11 {[%mdl 4096] Endgame KRB-KRB} 25. Rb1 f6 26. Bg3 Rc5 27. e4 g5 28. Bb8 f5 29. Ba7 Rc7 30. Be3 f4 31. Bd2 Rc2 32. Bb4 Bc5 (32... Bf6 {looks sharper.} 33. Rd1 Bb2 34. Be7 h6 35. Rd7 Be5) 33. Bxc5 {The position is equal.} Rxc5 34. Kg2 Kf7 35. Rb4 h5 36. a4 bxa4 37. Rxa4 Kf6 38. h3 {Accuracy: White = 75%, Black = 68%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.23"]
[Round "4.6"]
[White "Sevian, Samuel"]
[Black "Gareyev, Timur"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2642"]
[BlackElo "2557"]
[Annotator "TA"]
[PlyCount "233"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,232,23,9,28,28,34,33,50,51,52,19,66,69,84,42,41,33,29,46,54,25,16,0,78,68,86,81,96,91,151,130,130,130,114,106,109,105,235,214,406,207,312,222,247,194,539,522,550,0,0,0,0,0,0,0,0,0,0,-31,-60,-72,-66,-116,0,0,0,0,12,0,0,0,0,0,0,0,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,0,0,0,0,0,0,0,0,0,8,8,8,8,8,8,8,0,8,8,8,0,0,0,8,0,0,0,0,0,0,0,8,8,68,67,68,67,87,87,87,87,87,87,87,87,87,87,86,87,87,67,87,87,87,8,87,67,79,8,87,87,87,87,87,87,87,87,87,87,87,8,87,8,8,0,8,0,8,0,0,0,8,8,8,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,8,0,8,0,8,0,0,0,0,0,8,8,8,0,0,0,0,0,8,8,8,0,8,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. h3 Be6 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4} 10. g4 Ne7 11. Ng5 Bd5 $146 {White is slightly better.} ({Predecessor:} 11... h5 12. Nxe6+ fxe6 13. Kg2 Ng6 14. f4 Be7 15. Nd2 Kd7 16. Ne4 c5 17. Be3 {1-0 (116) Dominguez Perez,L (2760)-Dias,P (2416) Tromsoe 2014}) 12. Nc3 Ke8 13. f4 f6 14. Nxd5 Nxd5 15. Ne6 {Hoping for c4.} Kf7 16. f5 fxe5 17. c4 $36 {[%mdl 2048] Black is under pressure.} Nf6 18. Be3 {[%mdl 1024] White has compensation.} Bd6 19. Rad1 b6 (19... h6 $11) 20. g5 $1 $16 {[%cal Rg5f6]} Ne4 21. Kg2 Rae8 22. Kf3 Nc5 (22... g6 $142 23. Nxc7 (23. Kxe4 gxf5+ 24. Rxf5+ Kxe6 $14) 23... gxf5 24. Nxe8 Kxe8) 23. Nxc5 bxc5 24. Ke4 Rb8 25. Rf2 a5 26. h4 h6 (26... Rb4 $16) 27. g6+ $1 $18 Ke7 $2 {[#]} (27... Kf6 {keeps fighting.} 28. Rc2 Rhe8) 28. h5 (28. f6+ $142 $1 {[%mdl 512]} gxf6 29. Rdf1) 28... Rb4 (28... Rhf8 $142 29. Rc2 Rb6) 29. Rc2 Rhb8 30. Rdd2 Ra4 $2 (30... a4 31. Rg2 R4b7) 31. a3 Rb3 32. Rd3 $2 (32. f6+ $18 gxf6 33. Rf2 (33. Bxh6 Ke6 $16)) 32... Rxb2 $1 $11 33. f6+ {[%mdl 64] Decoy} ({Much worse is} 33. Rxb2 Rxc4+ 34. Bd4 cxd4 $17) 33... Kxf6 34. Rxd6+ $1 (34. Rxb2 Rxc4+ 35. Bd4 Ke6 $17) 34... cxd6 {[%cal Bc7d6,Bd6d5,Bd5d4][%mdl 32]} 35. Rxb2 {[%mdl 4096] Endgame KRB-KR} d5+ $1 ({Much weaker is} 35... Rxa3 $6 36. Rb6 $16) 36. Kf3 Rxa3 {Threatens to win with ...d4.} 37. Ke2 d4 ({Not} 37... dxc4 38. Rb7 $16) 38. Bd2 e4 39. Rb7 e3 (39... Ra2 $1 $17 40. Rf7+ Ke6) 40. Be1 Ra2+ 41. Kf3 {Bh4+ is the strong threat.} Rh2 42. Rf7+ Kg5 43. Rxg7 {Threatening mate with Rf7.} Kxh5 44. Rg8 Rh1 45. Bxa5 Rg1 46. g7 Kg6 47. Rc8 Kxg7 48. Rc7+ Kg8 49. Rxc6 {[%mdl 64] Double Attack} h5 50. Rxc5 {Strongly threatening Rd5.} h4 $1 51. Rh5 Rc1 52. c5 h3 53. Bc7 Rf1+ 54. Ke2 Rf2+ 55. Kd3 {And now Ba5 would win.} Rd2+ 56. Ke4 e2 $1 {[%cal Re2e1]} 57. Bg3 h2 58. c6 Rc2 59. Kxd4 Rxc6 60. Rxh2 Re6 61. Rh1 Ra6 62. Re1 Ra4+ 63. Kc5 Ra2 64. Kc4 Ra4+ 65. Kb3 Rg4 66. Bf2 Rg2 67. Rxe2 Kf7 68. Kc4 Rh2 69. Kd5 Rg2 (69... Rh5+ $1 $11 70. Kc4 Ra5) 70. Ke4 $14 Rg4+ 71. Kf5 Rb4 72. Bc5 Rb7 73. Rh2 {Intending Rh7+ and mate.} Rd7 74. Ke5 Rd1 75. Bd6 Rf1 76. Ra2 Rf6 77. Ra7+ $1 Kg6 78. Be7 Rf2 79. Ra6+ Kh5 80. Bc5 (80. Ra4 $1 $16) 80... Rg2 (80... Rc2 $11 {remains equal.}) 81. Kf4 Rg6 82. Ra1 ({Better is} 82. Bd6 $1 $16) 82... Rf6+ (82... Rg4+ $11 83. Kf3 Rc4) 83. Ke4 $16 Rg6 84. Be3 Kg4 85. Bf4 Re6+ {[#]} 86. Be5 $1 {aiming for Rg1+.} Rg6 87. Rf1 Rg5 {[#]} 88. Bf6 (88. Rh1 $1 $16) 88... Rg6 (88... Ra5 $11) 89. Rf4+ (89. Bd4 $16) 89... Kg3 $11 {The position is equal.} 90. Ke3 Kh3 91. Rf5 Rg3+ 92. Kf4 Rg4+ 93. Ke5 (93. Ke3 {feels hotter.} Rg3+) 93... Rg2 94. Rh5+ Kg4 95. Rh4+ Kg3 96. Re4 Kf3 97. Rf4+ Ke3 98. Ra4 Kd3 99. Kd5 Ke2 100. Ra3 Rg4 101. Be5 Kf2 102. Bd4+ Kg2 103. Ke5 Rg3 104. Ra2+ Kf3 105. Kf5 {[%csl Gd4][%cal Ra2f2]} Rh3 106. Rf2+ Kg3 107. Rf4 Rh2 108. Ke4 Rh3 109. Rf3+ $1 Kg2 110. Rf8 Rh4+ 111. Ke3 Rh3+ 112. Ke2 Rh4 113. Rg8+ Kh3 114. Be5 {White wants to mate with Rg3+.} Rg4 115. Rf8 Rg2+ 116. Kf3 {[%cal Rf8h8]} Rg3+ 117. Bxg3 $2 {[%mdl 8192] Accuracy: White = 60%, Black = 54%.} (117. Ke2 Ra3) 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.24"]
[Round "5.1"]
[White "Nakamura, Hikaru"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2746"]
[BlackElo "2828"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,61,13,31,17,39,27,40,28,39,43,45,31,39,37,37,5,2,15,10,22,15,16,19,0,42,42,42,41,41,41,41,41,45,42]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c4 b4 12. Nc2 a5 13. Qf3 {B33: Sicilian: Pelikan and Sveshnikov Variations} (13. g3) 13... Be6 14. Rd1 Bxd5 15. cxd5 Na7 {LiveBook: 5 Games} 16. g3 Rc8 17. Ne3 O-O 18. h4 Rc5 $146 ({Predecessor:} 18... a4 19. Qe2 Rc5 20. Qa6 Ra5 {1-0 (45) Gao,R (2454)-Melekhina,A (2188) Santa Clara 2014}) 19. Bd3 Nc8 20. O-O Qc7 21. Qe2 Nb6 22. Bb5 g6 23. a3 Bg7 24. axb4 axb4 25. Bd3 Nd7 26. Nc4 {[%cal Be3c4,Bc4d2,Bd2b3][%mdl 32]} Rc8 {[%cal Rc5c4]} (26... f5 $5 {[%cal Rf5e4]} 27. Nd2 Qd8 $11) 27. Nd2 {White is slightly better.} Ra5 {[%cal Bc5a5,Ba5a8,Ba8c8][%mdl 32]} 28. Nb3 Raa8 29. Rc1 Qb6 30. Rxc8+ Rxc8 31. Ra1 {Accuracy: White = 71%, Black = 60%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.24"]
[Round "5.2"]
[White "Dominguez Perez, Leinier"]
[Black "Xiong, Jeffery"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "2739"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "130"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,130,18,18,22,24,17,14,11,19,19,19,8,21,20,66,60,61,70,61,51,89,75,72,51,85,44,85,92,80,89,101,116,117,50,46,31,22,0,0,0,9,7,10,8,8,8,8,8,8,8,28,8,8,8,8,8,8,0,8,0,14,10,10,14,14,14,15,0,0,0,0,0,0,0,0,0,0,8,16,0,18,0,0,0,8,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Qxd4 a6 6. Bxd7+ Bxd7 7. Nc3 e5 8. Qd3 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7} Rc8 9. O-O h6 10. Nd2 Qc7 11. Rd1 Bg4 {LiveBook: 3 Games} 12. f3 Be6 13. Nf1 Nf6 14. Ne3 Be7 15. Bd2 {[#]} O-O $146 16. Kh1 Qc5 17. Be1 b5 {[#]} 18. b4 $1 {[%mdl 512]} Qb6 (18... Qxb4 19. Ncd5) 19. a4 Bc4 20. Qd2 Rfd8 21. axb5 axb5 22. Nf5 ({But not} 22. Nxc4 $6 Rxc4 23. Ra5 Rxb4 $15) 22... Kf8 23. Bh4 Be6 24. Nxe7 Kxe7 25. Ra5 Qc6 26. Nxb5 Qxc2 {[#]} 27. Ra7+ (27. Qe1 $1 $16) 27... Kf8 $14 {Hoping for ...Qxd2.} 28. Qxc2 Rxc2 29. Bxf6 gxf6 30. Nc7 Bb3 {Strongly threatening ...Rxc7!} 31. Rb1 Rc8 32. h3 Ba2 33. Ra1 R8xc7 34. Rxc7 Rxc7 35. Rxa2 $11 {[%mdl 4096] Endgame KR-KR} Rc1+ 36. Kh2 Rb1 {The position is equal.} 37. Ra8+ Ke7 38. Rb8 Rb2 39. h4 Ke6 40. Re8+ Kd7 41. Rh8 Rxb4 42. Rxh6 f5 $1 43. exf5 Rf4 44. Kg3 Rxf5 45. Kg4 Rf4+ 46. Kg5 Ke7 47. h5 Ra4 48. Rf6 e4 49. fxe4 Rxe4 50. Rf4 d5 51. Rf5 {aiming for h6.} d4 52. h6 {Threatens to win with h7.} Kf8 53. Rd5 Kg8 54. g4 {Kf5 is the strong threat.} Re6 55. Kh5 Kh7 56. g5 Re4 57. Rd7 {g6+ would kill now.} Kg8 58. Rd8+ Kh7 59. Rd5 Kg8 60. Rd7 Rf4 61. Re7 Kh8 62. Re8+ Kh7 63. Rf8 Rf1 64. Rd8 Rf4 65. Rd7 {Threatening mate with g6+.} Kg8 {Accuracy: White = 65%, Black = 71%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.24"]
[Round "5.3"]
[White "Robson, Ray"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2667"]
[BlackElo "2762"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,53,20,14,19,18,23,20,28,22,14,14,21,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 O-O 9. d4 {[%cal Bd2d4,Bd4d5][%mdl 32]} Ne8 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4} 10. d5 Bc5 11. Re1 d6 12. Nc3 Bf5 {The position is equal.} 13. Bd3 Qh4 14. g3 ({Much weaker is} 14. Bxf5 Qxf2+ 15. Kh1 Qxf5 $17) 14... Qh3 ({Avoid the trap} 14... Bxf2+ $2 15. Kxf2 Qxh2+ 16. Kf3 $18) 15. Ne4 Bxe4 16. Rxe4 Bxf2+ $1 17. Kxf2 {[%cal Bg1f2,Bf2f3,Bf3e2,Be2e1][%mdl 32]} Qxh2+ {[#]} 18. Kf3 $146 {Black must now prevent Rh4.} Qh5+ {[%mdl 64] [#] Double Attack} 19. g4 Qh3+ 20. Ke2 {Strongly threatening Qf1.} Qg2+ 21. Ke1 Nf6 $1 {[%cal Rf6e4]} 22. Qe2 Qh1+ 23. Qf1 Qh4+ 24. Qf2 Qh1+ 25. Qf1 Qh4+ 26. Qf2 Qh1+ 27. Qf1 {Accuracy: White = 78%, Black = 100%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.24"]
[Round "5.4"]
[White "Akobian, Varuzhan"]
[Black "Sevian, Samuel"]
[Result "0-1"]
[ECO "E32"]
[WhiteElo "2625"]
[BlackElo "2642"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,68,4,0,23,13,36,7,14,7,9,8,12,-4,8,-33,-29,-36,-8,-32,-38,-39,-24,-70,-48,-58,-14,-19,-18,-25,0,0,0,-83,-95,-60,-79,-86,-77,-81,-67,-93,-2,-146,-145,-141,-120,-223,-222,-710,-709,-700,-694,-675,-676]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 d6 7. g3 e5 8. Nf3 {E32: Nimzo-Indian: Classical (4 Qc2): 4...0-0} Nc6 9. Bg2 {[%cal Rd4e5] LiveBook: 7 Games} Ne4 (9... Re8 10. dxe5 dxe5 11. Bg5 h6 12. Rd1 Qe7 13. Bxf6 Qxf6 14. O-O Bg4 15. h3 Bh5 16. g4 Bg6 17. Rd2 Rad8 {1-0 (37) Dreev,A (2667)-Harikrishna,P (2726) Dubai 2014}) 10. Qe3 {White has an edge.} f5 11. b3 $146 ({Predecessor:} 11. O-O Qf6 12. Rd1 exd4 13. Nxd4 Bd7 14. Nxc6 Bxc6 15. Qd4 Qxd4 16. Rxd4 Rae8 {1-0 (44) Rohde,M (2537)-Feldman,E Parsippany 1999}) 11... Qf6 {[%cal Rc6d4]} 12. Bb2 exd4 13. Nxd4 Bd7 14. Rb1 {aiming for Nxc6.} Qg6 15. O-O Rae8 16. Qf4 a6 17. Rfe1 h6 18. Rbd1 Ne5 19. Nf3 {[%cal Rb2e5]} Ng4 20. Rf1 Qf7 21. Nd4 Qh5 {[%csl Gg4][%cal Rh5h2]} 22. h3 Ngf6 (22... c5 {feels hotter.} 23. Nf3 Ngf6 24. Nd2 Qxe2 25. Rfe1 Qh5) 23. Qf3 Qg6 24. e3 (24. Qd3 $1 $11) 24... Ng5 $36 {[%mdl 2048] Black has strong initiative.} 25. Qxb7 {Black must now prevent h4.} f4 $1 {[%cal Rf4g3]} 26. exf4 Nxh3+ 27. Bxh3 Bxh3 28. Rfe1 {[#]} ({Avoid the trap} 28. Qxc7 $2 Re3 $3 $19 {[%mdl 512]}) 28... Ne4 (28... Re4 $1 $17 {Strongly threatening ...Qg4.} 29. f5 (29. Qxc7 Rxf4 30. Nc6 Kh7 $16) 29... Bxf5 30. Qxc7 Bg4) 29. Qd5+ (29. f5 $1 $11 {was the only way to keep the balance.} Bxf5 30. Nxf5 Qxf5 31. Qd5+ Qxd5 32. Rxd5) 29... Kh7 30. Ne2 Bf5 31. Kg2 (31. Nc3 $17) 31... Nc5 $19 32. Nc3 $2 (32. Qd2) 32... Rxe1 {[%mdl 64] Overworked Piece. Black is clearly winning.} 33. Rxe1 Nd3 {[%mdl 64] Double Attack} 34. Re4 Bxe4+ {Accuracy: White = 28%, Black = 54%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.24"]
[Round "5.5"]
[White "Shankland, Samuel"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "D53"]
[WhiteElo "2731"]
[BlackElo "2637"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,63,21,17,33,15,31,19,30,30,26,28,33,23,30,20,24,27,28,24,37,20,55,9,15,10,23,11,24,0,12,5,6,8,8,5,5,5,5,5,5,8,5,11,6,0]} 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. Bg5 Be7 5. e3 h6 6. Bh4 O-O 7. Rc1 dxc4 8. Bxc4 c5 9. Nf3 cxd4 10. Nxd4 Bd7 11. O-O Nc6 {D53: Queen's Gambit Declined: 4 Bg5 Be7: Early deviations} 12. Nf3 (12. Nb3 Rc8 13. Be2 Nd5 14. Bxe7 Ncxe7 15. Nxd5 Nxd5 16. Qd4 b6 17. Bf3 Nf6 18. Qe5 Ba4 19. Rxc8 {½-½ (19) Sakaev,K (2607)-Georgiev,K (2675) Vrnjacka Banja 2010}) 12... a6 13. Be2 $146 ({Predecessor:} 13. a3 Na5 14. Ba2 Rc8 15. Ne5 Rc7 16. Qc2 Nc6 17. Bb1 Nxe5 18. Bxf6 g6 19. Bxe5 {1-0 (37) Tseng,W (2153)-Stephen (1760) ICCF email 2010}) 13... Nh5 14. Bxe7 Qxe7 15. Ne4 Rfd8 16. Qd6 {[#] Rxc6! is the strong threat.} Qxd6 17. Nxd6 Rab8 18. Rfd1 Nf6 19. Rd2 Be8 20. b3 Kf8 21. Kf1 (21. Bxa6 $5 bxa6 22. Nxe8 Rxd2 23. Nxd2 $14) 21... Ke7 22. Nxe8 Rxd2 23. Nxd2 Nxe8 24. Ne4 Nd6 {The position is equal.} 25. Nc5 Ne5 26. f4 Nd7 27. Nxd7 Kxd7 28. Bf3 Rc8 29. Rxc8 Kxc8 30. Ke2 Kc7 31. Kd3 f6 32. g3 {Accuracy: White = 74%, Black = 59%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.24"]
[Round "5.6"]
[White "Gareyev, Timur"]
[Black "Liang, Awonder"]
[Result "1-0"]
[ECO "A28"]
[WhiteElo "2557"]
[BlackElo "2590"]
[Annotator "TA"]
[PlyCount "143"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,143,0,7,-16,-8,-28,-3,-10,-18,-27,0,4,5,-1,0,0,12,2,24,27,28,28,25,8,18,0,0,-26,-29,-42,0,-12,0,0,0,0,0,0,0,0,0,0,0,0,25,-9,0,-20,25,20,11,17,24,13,45,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,37,29,69,75,75,69,75,64,64,56,64,57,212,69,327,69,69,69,391,391,370,69,303,97,556,545,1118,1093,1085,1056,1032,1032,999,992,923,762,593,447,376,302,256,69,69,59,64,56,56,56,56,56,527,19,491,449,29970,29972,29972,29973,29973,29974,29976,29977,29983,29983]} 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. d3 d5 5. cxd5 Nxd5 6. Bd2 {A28: English Opening: Four Knights Variation} (6. e4 Nxc3 7. bxc3 Bc5 8. Be2 O-O 9. O-O Bb6 10. a4 Re8 11. Qc2 Qf6 12. Kh1 h6 13. Ng1 Qd6 14. f4 Bxg1 15. Rxg1 exf4 {0-1 (42) Kramnik,V (2777)-Giri,A (2783) Wijk aan Zee 2019}) 6... Be7 7. e3 Ndb4 8. Qb1 {The position is equal.} Bf5 $146 ({Predecessor:} 8... Bg4 9. a3 Bxf3 10. axb4 Bh5 11. b5 Nb4 {1-0 (38) Cobb,C-Jeran,B Dos Hermanas 2004}) 9. Ne4 O-O 10. a3 Nd5 11. Be2 a5 12. Qc2 Kh8 13. Rc1 Nb6 14. Bc3 Bd6 15. O-O a4 16. Qb1 Bg6 17. Qa2 f5 18. Neg5 {White wants to play Ne6.} Qe7 {Hoping for ...e4.} 19. e4 Rae8 20. exf5 Rxf5 21. Ne4 Bf7 22. Qb1 Nd5 23. Bd2 Be6 24. Rfe1 Nf4 25. Bxf4 Rxf4 26. Bd1 Bg4 27. Nfd2 Bxd1 28. Rcxd1 Bc5 29. Nxc5 Qxc5 30. Ne4 Qb6 31. Qc2 Ref8 (31... Rd8 {is more complex.} 32. Rb1 Qb5 33. b3 Qxd3 34. Qxd3 Rxd3 35. bxa4 Rxa3 36. f3 Rxa4 37. Rxb7 Rf7) 32. Qxa4 (32. Kh1 {is interesting.} Ra8 33. f3 Qb5 34. Rc1 Rff8 35. Nc3) 32... Qxb2 33. Rb1 Qxf2+ $1 34. Nxf2 Rxa4 35. Rxb7 Rxa3 36. Rxc7 Nd4 37. Ng4 Ra2 38. Nxe5 Kg8 {Threatens to win with ...Re2.} 39. h4 Ne2+ 40. Kh1 Nf4 (40... Re8 {seems wilder.} 41. Nf3 h6 42. Rd7 Re6 43. Kh2 Rf6) 41. Rf1 Ng6 42. Rxf8+ Kxf8 43. Nxg6+ hxg6 $14 {[%mdl 4096] Endgame KR-KR} 44. Rc4 Rd2 45. Rf4+ Kg8 46. Rd4 Kh7 $2 (46... Kf7 $14) 47. Kh2 ({White must play} 47. Rd6 $1 $18) 47... Kh6 $2 {[%mdl 8192] [#]} (47... g5 $1 $14) 48. Rd5 $2 ({Only move:} 48. Rd6 $1 $18) 48... g5 $1 49. hxg5+ Kg6 $2 {[%mdl 8192]} (49... Kh5 $1 $14) 50. Kg3 $18 Kh5 51. Kh3 $2 (51. Kf3 $18 g6 52. d4) 51... Kg6 $2 {[#]} (51... Rd1 $1 $14) 52. Rd7 $2 (52. g3 $1 $18 {and the rest is easy.}) 52... Re2 $2 {[%mdl 8192]} (52... Kh5 $16) 53. g3 Rd2 54. Kg4 Rd1 55. Rd6+ Kf7 56. Rd4 Kg6 57. Rd7 Ra1 58. Rd6+ Kf7 59. Rd4 Kg6 60. Re4 Ra5 61. Kf4 $2 ({Better is} 61. Re6+ $18 Kf7 62. Rd6) 61... Rf5+ $14 62. Ke3 Rxg5 63. g4 Ra5 64. d4 Kf6 65. Kd3 g5 $2 {[%mdl 8192]} ({Black should play} 65... Rg5 $14) 66. Kc4 $18 {Black should prevent Re1.} Ra1 $2 {[%mdl 8192]} (66... Ra3 $1 $11) 67. d5 Rc1+ (67... Ra4+ $18 68. Kd3 Ra3+ 69. Ke2 Ra6) 68. Kb5 {White mates.} Rb1+ 69. Kc6 Rc1+ 70. Kd7 Kf7 71. Re5 Kg6 72. Ke6 {Accuracy: White = 54%, Black = 32%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.25"]
[Round "6.1"]
[White "So, Wesley"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "C65"]
[WhiteElo "2762"]
[BlackElo "2739"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,79,25,27,21,20,16,18,14,19,14,17,0,0,0,0,-12,5,0,0,-28,0,0,22,28,24,0,0,-8,0,0,0,0,26,0,0,0,0,0,0,0,-2,-81,-72,-68,-79,-72,-42,-144,-132,-161,-168,-189,-193,-195,-174,-128,-26,-41,-36,-46,-66,-39,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Bxc6 dxc6 6. Nbd2 {C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5} (6. c3 {is interesting.} Bd6 7. Bg5 a5 8. Nbd2 h6 9. Bh4) 6... Be6 7. O-O Bd6 8. b3 (8. d4 Nd7 9. dxe5 Nxe5 10. Nxe5 Bxe5 11. f4 Bd4+ 12. Kh1 f5 13. Qe2 O-O {½-½ (57) So,W (2788)-Dominguez Perez,L (2739) Saint Louis 2017}) 8... Nd7 9. Nc4 Qe7 10. a4 $146 ({Predecessor:} 10. Bb2 Bxc4 11. bxc4 O-O 12. a4 a6 13. g3 Nc5 {0-1 (43) Robson,R (2667)-So,W (2765) chess.com INT 2019}) 10... Bxc4 11. bxc4 a5 12. g3 O-O-O 13. Bd2 b6 $1 14. Qe2 Nc5 15. c3 Kb7 16. Be3 Rhe8 17. Rfd1 f6 18. Nd2 Na6 19. Nb3 c5 20. f3 Nb8 21. d4 exd4 22. cxd4 cxd4 23. Rxd4 {Hoping for c5!} Na6 24. Rb1 Bb4 $1 25. c5 (25. Rd5 $11 {keeps the balance.} c5 26. Kg2) 25... Rxd4 $1 $17 {[#]} (25... Nxc5 $2 26. Rxb4 $1 {[%mdl 512]} axb4 27. Nxc5+ bxc5 28. Qb5+ Kc8 29. Bxc5 $18) 26. c6+ $1 {[%mdl 512]} Kxc6 {...Rxe4! is the strong threat.} 27. Qxa6 ({Of course not} 27. Nxd4+ Kb7 $11) 27... Rd6 28. Bf4 (28. Nd4+ $1 $15 Kd7 29. Nf5) 28... Kd7 29. Rc1 {[#]} Rd8 $1 30. Kg2 ({Wrong is} 30. Rxc7+ $2 Kxc7 31. Nd4 (31. Qa7+ $2 Kc6 $19) 31... Rc8 $19) 30... Ke8 {White must now prevent ...R6d7.} 31. Bxd6 Qxd6 32. Qc4 Kf8 (32... Rd7 $17 33. Qg8+ {[%mdl 64] Double Attack} Qf8 34. Qe6+ Kd8) 33. Qxc7 $11 Qxc7 34. Rxc7 {[%mdl 4096] Endgame KRB-KRN} Rd3 35. Nc1 Rd1 36. Ne2 {The position is equal.} Rd2 37. Kf1 Rd1+ 38. Kg2 Rd2 39. Kf1 Rd1+ 40. Kg2 {Accuracy: White = 42%, Black = 64%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.25"]
[Round "6.2"]
[White "Caruana, Fabiano"]
[Black "Xiong, Jeffery"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "2828"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,89,14,30,12,20,18,18,20,24,24,31,0,0,-2,-8,-8,-5,0,0,-27,-7,-8,-10,-41,0,-17,0,0,0,0,42,38,25,32,45,42,43,17,107,99,107,93,122,104,159,93,172,169,184,140,225,225,225,225,225,225,225,225,225,225,225,225,223,212,279,272,343,341,869,830,858,838,828,825,784,739]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Bxc6 dxc6 6. O-O {C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5} Qe7 7. Nbd2 Bg4 8. h3 Bh5 {LiveBook: 7 Games} 9. a3 a5 10. Nc4 Nd7 11. g4 Bg6 $1 12. b4 Bb6 $146 ({Predecessor:} 12... axb4 13. Bg5 f6 14. axb4 Rxa1 15. Qxa1 {½-½ (30) Anand,V (2783)-Nakamura,H (2792) Saint Louis 2017}) 13. bxa5 (13. Bb2 {keeps more tension.} f6 14. Nh4 a4 15. Nxb6 cxb6 16. f4) 13... Bxa5 14. Bb2 {[%cal Rf3e5]} f6 15. Nxa5 Rxa5 16. Nh4 O-O 17. Nf5 Qe6 18. Kh2 c5 19. h4 c4 20. h5 Bf7 21. Rg1 cxd3 22. cxd3 Rb5 23. Bc1 {[%cal Bb2c1,Bc1e3,Be3h6][%mdl 32]} Kh8 24. Be3 Rb3 25. Rg3 c5 26. Qe2 g5 (26... Rg8 $11) 27. hxg6 $1 $16 Bxg6 ({Wrong is} 27... hxg6 $2 28. Rh3+ Kg8 29. Rh1 $18) 28. a4 Qa6 29. Bh6 {And now Qa2 would win.} Rg8 (29... Ra8 $142) 30. Rag1 (30. Ne7 $142 $1) 30... Qxa4 (30... Qe6 $16 {is a better defense.}) 31. Ne7 Qd4 32. Qd1 c4 (32... Ra3 $16) 33. Nxg8 $18 Kxg8 34. dxc4 $1 Rxg3 35. Qxd4 ({Don't do} 35. fxg3 $6 Bxe4 36. Qxd4 exd4 $16) 35... exd4 36. Kxg3 Bxe4 {[%mdl 4096] Endgame KRB-KBN} 37. Rd1 d3 38. f3 Bg6 39. Ra1 Kf7 40. Ra7 Nc5 41. Be3 Ke8 $2 (41... Nd7 42. Rxb7 Ke8) 42. Bxc5 {White is clearly winning.} d2 {[#]} 43. Ra8+ $1 Kd7 {[#]} 44. Bb6 $1 ({Not} 44. Ra1 Bc2 $11) 44... Kc6 45. Ba5 {Precision: White = 76%, Black = 37%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.25"]
[Round "6.3"]
[White "Nakamura, Hikaru"]
[Black "Gareyev, Timur"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2746"]
[BlackElo "2557"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,65,15,22,21,45,18,43,52,44,31,16,10,4,14,17,-5,37,32,32,44,43,14,20,25,22,16,28,15,13,18,18,15,14,0,30,32,93,103,97,87,119,113,146,125,204,203,187,181,177,148,337,325,445,433,432,430,609,614]} 1. Nf3 c5 2. g3 g6 3. c3 (3. Bg2 Bg7 4. O-O Nc6 5. c3 e5 6. e4 Nge7 7. d3 O-O 8. a3 a5 9. a4 d5 10. Na3 d4 11. cxd4 cxd4 12. Nc4 Rb8 13. b3 b5 14. axb5 Rxb5 15. Ba3 Nb4 16. Bxb4 axb4 {1-0 (37) Maghsoodloo,P (2673)-Grandelius,N (2694) Astana 2019}) 3... d5 4. Bg2 Nf6 5. d4 Nbd7 6. Ne5 {A04: Unusual lines after 1 Nf3 and King's Indian Attack} Qb6 $146 ({Predecessor:} 6... Bg7 7. O-O O-O 8. Nxd7 Bxd7 9. dxc5 Bc6 10. Nd2 a5 11. Rb1 a4 {½-½ (27) Trapp,M (2072)-Lochte,T (2118) Bayern 2011}) 7. dxc5 Qxc5 8. Nd3 {White is slightly better.} Qc7 9. Qa4 Bg7 10. Bf4 Qd8 11. O-O O-O 12. Nd2 Nb6 13. Qb3 Bg4 14. Rfe1 Qc8 15. Qb4 Re8 16. a4 Nbd7 17. Ne5 $36 {[%mdl 2048] White is more active.} a5 18. Qb5 Nxe5 19. Bxe5 Bd7 20. Qd3 Bc6 21. Qd4 Qf5 22. Nf1 Rad8 (22... Qe6 $14) 23. b4 $16 Qc8 24. Ne3 b6 25. Red1 Ba8 26. b5 h5 (26... Bf8 $16 27. Bxf6 (27. Qxb6 Nd7 $16) 27... exf6) 27. Rac1 $18 Bf8 28. Bxf6 exf6 29. Qxb6 {[%cal Re3d5]} Re6 $2 {[#]} (29... Kg7 $16 30. Qxa5 (30. Nxd5 Bxd5 31. Rxd5 Rxd5 $16) 30... Bc5) 30. Qxa5 Bc5 {intending ...Bb6.} 31. Nxd5 {White is clearly winning.} Rde8 32. e3 Kg7 (32... Rd6 $142 33. c4 h4) 33. Qc7 {Precision: White = 62%, Black = 54%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.25"]
[Round "6.4"]
[White "Sevian, Samuel"]
[Black "Shankland, Samuel"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2642"]
[BlackElo "2731"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,62,27,0,0,-18,-6,0,-5,-3,-23,-14,-14,-12,-15,-25,18,0,0,0,0,-37,-44,-29,-7,-7,-7,-8,0,0,0,-28,-25,-25,-23,-23,-17,-16,-14,-44,-27,-30,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. h3 Bd7 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4} (9... Ke8 10. Nc3 h5 11. Ne2 b6 12. Bg5 c5 13. Nc3 Bb7 14. Rfd1 Bxf3 15. gxf3 c6 16. Rd3 Be7 17. Ne4 Rd8 18. Rad1 Rxd3 19. Rxd3 Bxg5 20. Nxg5 {½-½ (33) Vachier Lagrave,M (2781)-Nakamura,H (2746) London 2018}) 10. Rd1 Be7 11. g4 (11. a4 {keeps more tension.} a5 12. Ng5 Ke8 13. Nc3 Rd8 14. Nge4) 11... Nh4 12. Nxh4 Bxh4 13. Nc3 Kc8 14. Kg2 Re8 $146 ({Predecessor:} 14... b6 15. Bf4 h5 16. f3 Be6 17. Bg3 {½-½ (32) Djukic,N (2529)-Codenotti,M (2385) Skopje 2015}) 15. Bf4 Be7 16. Bg3 h5 17. f3 a5 {[%cal Ba7a5,Ba5a4][%mdl 32]} 18. Ne2 a4 19. Rd2 Bb4 20. c3 Bc5 21. Nf4 hxg4 22. hxg4 Be3 ({Much weaker is} 22... Rxe5 $6 23. Nd3 $16) 23. Rd3 (23. e6 $5 Bxe6 {[#]} 24. Nxe6 $1 {[%mdl 512]} Rxe6 25. Re2 $11) 23... Bxf4 $1 24. Bxf4 Be6 25. a3 Ra5 26. Rad1 b6 27. Rd4 Kb7 28. R1d2 Rea8 29. Kg3 {The position is equal.} Rb5 30. Re2 Raa5 31. Kh4 Ra8 {Accuracy: White = 64%, Black = 68%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.25"]
[Round "6.5"]
[White "Lenderman, Aleksandr"]
[Black "Robson, Ray"]
[Result "1/2-1/2"]
[ECO "D14"]
[WhiteElo "2637"]
[BlackElo "2667"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,93,18,20,18,79,68,67,71,77,20,40,39,27,14,22,9,22,8,67,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. cxd5 cxd5 5. Nc3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Qb3 Bb4 9. Ne5 {D14: Slav Defence: Exchange variation with ...Bf5} O-O (9... Bxc3+ $11 10. bxc3 Nxe5 11. Bxe5 O-O) (9... Bxc3+ 10. bxc3 Nxe5 11. Bxe5 O-O 12. Be2 Rc8 13. f3 Qa5 14. Rc1 Rc6 15. g4 Bg6 16. h4 h6 {0-1 (29) Svane,R (2595)-Vidit,S (2711) Douglas 2018}) 10. Nxc6 $16 Bxc3+ $1 11. Qxc3 {White is slightly better.} bxc6 12. Be2 (12. h4 $16) 12... Ne4 $11 13. Qa3 g5 $1 {[%cal Rg5f4]} 14. Bg3 Qb6 15. O-O a5 16. Rfc1 Rfc8 (16... Nxg3 $11 17. hxg3 a4) 17. Bd3 $146 (17. Be5 $14) 17... Nxg3 {The position is equal.} 18. hxg3 Bxd3 19. Qxd3 c5 20. dxc5 Rxc5 21. Rc2 Qb5 22. Qd1 Rac8 23. Rac1 Rxc2 24. Rxc2 Rxc2 25. Qxc2 {[%mdl 4096] Endgame KQ-KQ} h6 26. Qc8+ Kg7 27. Qc3+ Kg6 28. Qc2+ Kg7 29. b3 Qb4 30. Qb2+ f6 31. a3 Qe1+ 32. Kh2 e5 33. b4 axb4 34. axb4 Qd1 35. f3 {[#] Threatens to win with b5.} d4 36. exd4 exd4 ({Of course not} 36... Qxd4 37. Qxd4 exd4 38. Kg1 $16) 37. b5 d3 38. b6 d2 {[#] White must now prevent ...Qe1.} 39. b7 Qc1 40. b8=Q {Intending Q2b7+ and mate.} (40. Qb4 {keeps more tension.} d1=Q 41. Qe7+ Kg6 42. Qe4+ Kg7 43. Qe7+) 40... Qxb2 41. Qxb2 d1=Q {KQ-KQ} 42. Qb7+ Kg6 43. Qe4+ Kg7 44. Qe7+ Kg6 45. Qe8+ Kg7 46. Qe7+ Kg6 47. Qe8+ {Accuracy: White = 61%, Black = 73%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.25"]
[Round "6.6"]
[White "Liang, Awonder"]
[Black "Akobian, Varuzhan"]
[Result "1-0"]
[ECO "C18"]
[WhiteElo "2590"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,99,42,49,20,35,-15,-26,-10,-24,-12,-21,-31,0,0,0,0,0,0,20,19,25,0,44,40,46,28,34,28,68,7,34,-8,-8,-40,-45,-121,16,16,78,16,62,16,64,67,234,39,272,8,920,586,1177,1151,1139,1112,1091,1081,1483,1487,2374,2173,2127,1960,29984,29985,29984,29985,29987,29988,29988,29989,29989,29990,29990,29991]} 1. e4 e6 2. d4 d5 3. Nc3 Bb4 4. e5 c5 5. a3 Bxc3+ 6. bxc3 Ne7 7. Qg4 cxd4 8. Bd3 Qc7 9. Ne2 dxc3 10. Qxg7 Rg8 11. Qxh7 Nbc6 12. Bf4 Bd7 13. Bg3 Nxe5 14. O-O O-O-O 15. Qh4 {C18: French: 3 Nc3 Bb4: Main line: 7 h4 and 7 Qg4} (15. Rab1 N7c6 16. Bb5 f6 17. Qh6 Rdf8 18. Rb3 Kb8 19. Rfb1 Ka8 20. Rxc3 Qa5 21. Rcb3 Rh8 22. Qe3 Ng4 {1-0 (30) Eliseev,U (2602)-Lugovskoy,M (2502) Loo 2016}) 15... N5g6 16. Bxc7 Nxh4 17. Bxd8 {Black has an edge.} Rxg2+ 18. Kh1 Kxd8 19. Rab1 $146 ({Predecessor:} 19. f4 Nef5 20. Rg1 Rf2 21. Raf1 Rxf1 22. Rxf1 Bc6 {1-0 (104) Godoy Bugueno,D (2340)-Egger Mancilla,J (2425) Santiago de Chile 1994}) 19... e5 20. Rxb7 Bc6 21. Rb8+ Kc7 22. Rh8 $36 {[%mdl 2048] White fights for an advantage.} d4 {( -> ...Rxf2+)} 23. f3 $1 Neg6 24. Bxg6 (24. Rh7 {with more complications.} Kd6 25. Rxf7 Ba4 26. Re1 Be8 27. Rf6+) 24... Nxg6 (24... fxg6 {keeps more tension.} 25. Nxc3 Rxc2 26. Rxh4 dxc3 27. Rc4 Kd6) 25. Kxg2 Nxh8 $11 {[%mdl 4096] Endgame KRN-KBN} 26. h4 f6 $1 27. Kf2 Kd6 28. h5 (28. Rb1 $14) 28... Ba4 $1 29. Rg1 Nf7 $1 30. Rb1 Bxc2 31. Rb7 {[#]} (31. Rc1 $15 Ba4 32. Nxc3 $1 {[%mdl 512]} dxc3 33. Rxc3) 31... Nh6 (31... Ng5 $1 $17 {...Nh3+ is the strong threat.} 32. Rxa7 Bh7) 32. Rxa7 Bb3 (32... Bd3 $11 {remains equal.}) 33. a4 (33. Ra6+ $16 Ke7 34. a4) 33... Bc4 34. a5 {And now a6 would win.} (34. Rg7 $5 {[%cal Rg7g6]}) 34... c2 35. Nc1 {Strongly threatening a6.} f5 $2 ({Black should try} 35... d3 $14 36. Ra8 Ke6) 36. Rh7 $2 (36. Ra8 $18) 36... Ng8 $2 (36... Nf7 $1 $14) 37. h6 $2 ({White should play} 37. Ke1 $18) 37... e4 $2 {[%mdl 8192]} (37... Nf6 $11 38. Rg7 e4 39. fxe4 fxe4) 38. fxe4 fxe4 {[#] White must now prevent ...d3.} 39. Rd7+ $3 {[%mdl 512]} Kxd7 40. h7 e3+ 41. Kf3 e2 42. Kf2 Nf6 43. h8=Q Ke7 44. Qh4 d3 45. Qxc4 {White mates.} d2 46. Qxe2+ Kf8 47. Qxd2 Ne4+ 48. Ke2 Nxd2 49. Kxd2 Ke7 50. a6 {Accuracy: White = 26%, Black = 17%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.27"]
[Round "7.1"]
[White "Akobian, Varuzhan"]
[Black "Nakamura, Hikaru"]
[Result "0-1"]
[ECO "A41"]
[WhiteElo "2625"]
[BlackElo "2746"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,94,26,31,36,35,36,37,28,3,11,6,23,0,0,0,11,-35,-24,-25,0,0,0,0,0,0,0,0,0,-21,-6,-28,-39,-53,-49,-54,-48,-54,-54,-52,-41,-49,-39,-46,-35,-90,-93,-89,-95,-99,-89,-119,-87,-87,-85,-85,-85,-85,-78,-82,-87,-95,-76,-82,-61,-84,-77,-194,-192,-183,-187,-316,-296,-283,-254,-540,-523,-497,-474,-475,-475,-4133,-3941,-1741,-1635]} 1. d4 d6 2. Nf3 g6 3. c4 Bg7 4. Nc3 Nc6 5. d5 Ne5 6. Nxe5 Bxe5 7. e4 Nf6 {A41: 1 d4 d6: Tartakower System and Modern Defence} 8. Bd3 O-O 9. O-O e6 {White is slightly better.} 10. h3 exd5 11. cxd5 $146 ({Predecessor:} 11. exd5 Nd7 12. Bh6 Re8 13. Qd2 Nc5 14. Bc2 a5 15. Rae1 {0-1 (47) Cvitan,O (2491)-Onischuk,V (2601) Tallinn 2016}) 11... Nh5 12. f4 Bd4+ 13. Kh2 $1 Qh4 14. Qe1 Qxe1 15. Rxe1 Bf2 16. Rf1 Bg3+ 17. Kg1 f5 18. Rf3 Bxf4 19. Bxf4 fxe4 20. Bxe4 {And now Bh6 would win.} Nxf4 21. Raf1 g5 22. h4 Bg4 23. Rg3 h5 $1 $36 {[%mdl 2048] Black has some pressure.} 24. hxg5 Rae8 25. Bf3 $1 Re5 26. Bxg4 hxg4 27. Rxg4 Nxd5 {Hoping for ...Rxf1+.} 28. Nxd5 (28. Rf3 $15) 28... Rxf1+ $17 29. Kxf1 Rxd5 $15 {[%mdl 4096] Endgame KR-KR} 30. Ke2 Kg7 31. Rc4 c6 32. Re4 Kg6 33. Re7 Rb5 $1 {[%cal Rb5b2]} ({Of course not} 33... Kxg5 $6 34. Rxb7 a5 35. Rc7 $11) 34. b3 Kxg5 35. Rd7 {[#]} d5 $1 36. Kd3 Kf6 37. Kc3 a5 38. Rc7 Ke6 39. a3 {[#]} (39. g4 $17) 39... d4+ $1 $19 {[%mdl 512]} 40. Kc4 {[#]} (40. Kxd4 Kd6) 40... d3 $1 {[%cal Rd3d2][%mdl 512] ( -> ...d2)} 41. Kc3 {[#]} (41. Rh7 {is the only way for White.}) (41. Kxd3 Kd6) 41... d2 $1 {[%cal Rd2d1][%mdl 512]} 42. Kxd2 Rxb3 43. g4 $2 (43. a4) 43... a4 {Black is clearly winning.} 44. g5 {If only White now had time for g6....} Kd6 45. Rf7 {[#]} b5 $1 46. g6 (46. Rf6+ $142 Kc7 47. Rf4) 46... Rxa3 47. g7 Rg3 {Accuracy: White = 45%, Black = 88%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.27"]
[Round "7.2"]
[White "Xiong, Jeffery"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "D92"]
[WhiteElo "2663"]
[BlackElo "2762"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,79,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,17,4,8,0,6,16,43,37,27,27,35,14,10,11,22,21,50,42,33,0,44,40,52,38,43,31,40,31,41,28,41,41,41,20,14,8,22,16,13,8]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Bf4 O-O 6. Rc1 dxc4 7. e3 Be6 8. Ng5 Bd5 9. e4 h6 10. exd5 hxg5 11. Bxg5 Nxd5 12. Bxc4 Nb6 13. Bb3 Nc6 14. d5 {D92: Grünfeld: 4 Nf3 Bg7 5 Bf4} Nd4 15. O-O Re8 16. h4 Qd7 17. a4 (17. a3 Nxb3 18. Qxb3 Rad8 19. Rfe1 Nxd5 20. Nxd5 Qxd5 21. Qxd5 Rxd5 22. Rxc7 Bxb2 23. Rxb7 Bxa3 24. Rxa7 {½-½ (30) Vitiugov,N (2709)-Vachier Lagrave,M (2778) Shenzhen 2018}) 17... Nxb3 18. Qxb3 Bxc3 19. Rxc3 Qxd5 20. Qc2 Rad8 $146 ({Predecessor:} 20... c6 21. Re1 Qf5 22. Qxf5 gxf5 {½-½ (32) Troia,E (2072)-Pietrocola,R (2168) ICCF email 2011}) 21. Rxc7 Rc8 22. Re1 ({Not} 22. Bxe7 $2 Qe5 $19) 22... Rxc7 23. Qxc7 e5 24. a5 Nd7 25. b4 Nf8 26. Bf6 {[%cal Re1e5]} Nd7 27. Be7 Kg7 28. Bg5 Nf8 29. Bf4 {[%cal Re1e5]} Nd7 30. Bg5 Nf8 31. Qc3 f6 32. Be3 a6 33. Qc1 Qf7 34. Bh6+ Kh7 35. Bxf8 Qxf8 36. Qc7+ Re7 37. Qb6 Rd7 {The position is equal.} 38. Rc1 Qe7 39. g3 f5 40. Qc5 {Accuracy: White = 72%, Black = 82%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.27"]
[Round "7.3"]
[White "Gareyev, Timur"]
[Black "Caruana, Fabiano"]
[Result "0-1"]
[ECO "D27"]
[WhiteElo "2557"]
[BlackElo "2828"]
[Annotator "TA"]
[PlyCount "250"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,250,31,32,40,31,30,42,28,33,36,36,29,19,26,40,30,29,41,35,31,35,-4,18,14,4,15,16,15,18,12,33,22,28,35,33,19,21,20,56,18,13,17,33,16,20,18,20,18,20,18,18,18,28,18,21,18,18,18,43,18,20,18,26,0,18,0,27,18,24,20,32,9,9,8,37,19,16,0,12,0,0,0,0,0,0,0,0,-29,-26,-26,-23,-18,-22,-18,-22,-25,-20,-61,-57,-144,-155,-141,-147,-161,-80,-75,-79,-79,-8,-9,0,-9,-10,-113,-88,-420,-406,-364,-45,-35,-43,-43,-20,-20,-20,-20,-20,-20,-20,-20,-20,-20,-20,-20,-20,-20,-20,-20,-20,-42,-27,-42,-20,-20,-20,-35,-20,-42,-42,-42,-42,-42,-42,-42,-20,-42,-42,-42,-20,-20,-20,-20,-20,-20,-20,-42,-20,-20,0,-42,-20,-20,-20,-20,-15,-15,-15,-15,-15,-20,-20,-20,-15,-20,-20,-20,-20,-42,-42,-42,-42,-42,-15,-42,-42,-42,-42,-42,-42,-42,-42,-42,0,-42,-42,-42,-42,-42,-42,-42,-20,-20,-27,-42,-35,-42,-42,-42,-42,-39,-16,-39,-39,-39,-39,-38,-39,-48,-8,-29986,-29987,-29987,-29988,-29988,-29988,-29990,-29991]} 1. Nf3 d5 2. d4 Nf6 3. c4 dxc4 4. e3 e6 5. Bxc4 c5 6. O-O a6 7. dxc5 Bxc5 8. Qxd8+ Kxd8 9. Rd1+ {D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4} (9. Ne5 Ke7 10. Be2 Nbd7 11. Nc4 b6 12. Nbd2 a5 13. Nb3 Ba6 14. Nxc5 bxc5 15. f3 Rhb8 16. Kf2 a4 {½-½ (27) Van Wely,L (2663)-Ponomariov,R (2687) Germany 2018}) 9... Ke7 10. Be2 b6 11. Ne5 {White is slightly better.} Bb7 12. Nd2 Rd8 13. Nd3 Bd6 14. Nc4 Bc7 $1 15. b3 Nc6 $146 ({Predecessor:} 15... b5 16. Nce5 Ne4 {1-0 (45) Goryachkina,A (2438)-Wozniak,M (2069) Warsaw 2013}) 16. Ba3+ Ke8 17. Bf3 Nd5 18. Nf4 b5 19. Nxd5 exd5 20. Nd2 {[%cal Bc4d2,Bd2f1,Bf1g3][%mdl 32]} Be5 21. Rab1 $1 b4 22. Bb2 Bc3 23. Nf1 Bxb2 24. Rxb2 Ne5 25. Ng3 Rac8 26. Rbd2 {[%cal Rf3d5]} Rc5 27. Nf5 g6 28. Nd4 a5 29. a3 bxa3 30. Ra2 Nc6 31. h3 Nb4 32. Rxa3 Kd7 33. g4 Kc7 34. Kg2 Kb6 35. h4 Rc3 36. Rda1 Ra8 37. g5 Bc6 38. Rd1 Rd8 39. Rda1 Rc5 40. Rd1 Bd7 41. Kg3 Rdc8 42. Raa1 Be6 43. h5 Rc3 44. Rab1 Rg8 45. Rh1 Nc6 46. Nxc6 Rxc6 47. hxg6 Rxg6 48. Kf4 Rc2 49. Rbf1 Rb2 50. Bd1 a4 51. bxa4 (51. Bh5 $5 {[%cal Rh5g6]} Rg8 52. bxa4 Rb4+ 53. Ke5 Rxg5+ 54. Kf6 Rf5+ 55. Ke7 $11) 51... Rb4+ 52. Kf3 Rxg5 53. Ke2 d4 54. Rfg1 Rd5 55. exd4 Rbxd4 56. f3 h5 57. Kf2 ({Better is} 57. Ke3 $15) 57... Rd2+ $1 $17 58. Ke3 R5d3+ 59. Kf4 {[#]} h4 $1 {[%mdl 512]} 60. Re1 (60. Rxh4 Rxd1) 60... Rd4+ 61. Ke3 f5 (61... R2d3+ $1 $17 62. Kf2 Ra3) 62. Be2 $11 f4+ 63. Kf2 h3 64. Rb1+ (64. Kg1 $1 $11 {was the only way to keep the balance.}) 64... Ka7 65. Ke1 $2 {[%mdl 8192]} (65. Rb5 $17 {nothing else works.}) 65... Ra2 $19 66. Bf1 Rd5 $2 ({Inferior is} 66... Raxa4 67. Bxh3 Ba2 68. Rb2 $11) ({Worse is} 66... h2 67. Be2 $15) (66... Rdxa4 $19 67. Bxh3 Ra1 68. Rxa1 Rxa1+ 69. Kd2 Rxh1 70. Bxe6 Kb6) 67. Bxh3 $15 Rh5 68. Bg2 $1 Rxh1+ 69. Bxh1 {[%mdl 4096] Endgame KRB-KRB} Rh2 70. Bg2 Rxg2 $11 {KRB-KR} 71. Rb4 Bd5 72. Rxf4 Kb6 73. a5+ Kc5 74. a6 Ra2 (74... Rc2 {looks sharper.} 75. a7 Ra2 76. Kd1 Bb3+ 77. Kc1 Rxa7 78. Kd2 Rd7+) 75. a7 Rxa7 (75... Bc6 {is interesting.} 76. Rf6 Bb7 77. Rf7 Rxa7 78. Kd2 Ra2+) 76. Kf2 Kd6 77. Kg3 Ke5 78. Rf8 Bf7 79. Rb8 Ra3 80. Rb4 Bd5 81. Rf4 Ra8 82. Rg4 Rf8 83. f4+ Kd4 84. f5+ Ke5 85. Rg5 Be4 (85... Rxf5 $2 86. Rxf5+ Kxf5 $19) 86. f6+ Bf5 (86... Kxf6 $2 87. Kf4 $19) (86... Kd4 {with more complications.} 87. Rb5 Ke3 88. Rb3+ Bd3 89. Kg2 Ra8) 87. Kf2 Rxf6 (87... Kxf6 $2 88. Rh5 $19) 88. Ke3 Ra6 89. Rg3 Ra2 90. Rf3 Be4 91. Rg3 Bf5 92. Rf3 Bg4 93. Rg3 Ra4 (93... Ra3+ {is more complex.} 94. Kf2 Ra4 95. Ke3 Bf5 96. Rg5 Ra8) 94. Kd2 Kf4 95. Rb3 Be6 96. Rb6 Bd5 97. Rb2 Ke4 98. Kc3 Ke3 99. Rb4 Ra3+ 100. Kb2 Ra8 101. Kc3 Rc8+ 102. Kb2 Kd3 {White must now prevent ...Rc2+.} 103. Ka3 Bc4 {...Ra8+ is the strong threat.} 104. Rb2 Ra8+ 105. Kb4 Kd4 106. Rd2+ Bd3 107. Rb2 Ra7 {Hoping for ...Ra1.} 108. Rb3 Ra8 {Strongly threatening ...Bc4.} 109. Rb2 $1 Ra1 110. Rb3 Bc4 111. Rb2 Rd1 {Threatens to win with ...Ra1.} 112. Ka3 Kc5 (112... Kc3 $2 113. Rb3+ Kd4 114. Rb6 $19) 113. Rb7 Rd2 {[%csl Gc4][%cal Rd2a2]} 114. Rc7+ $1 Kd4 115. Kb4 Rb2+ 116. Ka5 Kd5 {aiming for ...Bf1.} 117. Rc8 Rb5+ 118. Ka4 Kd4 119. Rh8 Rb1 {And now ...Bb5+ would win.} 120. Rh3 Bd3 121. Ka5 Kc3 {( -> ...Rb5+)} 122. Rg3 $2 {[%mdl 8192] [#]} (122. Rh5 $11 Bc4 123. Rc5) 122... Rb5+ $1 {Black mates.} 123. Ka4 Rh5 124. Rf3 Rh1 {[%cal Rh1a1]} 125. Ka5 {[#]} Rh6 $1 {Accuracy: White = 59%, Black = 67%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.27"]
[Round "7.4"]
[White "Dominguez Perez, Leinier"]
[Black "Lenderman, Aleksandr"]
[Result "1-0"]
[ECO "B40"]
[WhiteElo "2739"]
[BlackElo "2637"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,91,24,22,28,28,28,28,29,33,35,33,31,31,36,11,11,9,9,12,14,13,94,104,144,90,89,83,131,120,119,126,138,127,202,191,200,204,191,198,210,204,217,190,242,175,183,167,190,173,177,191,187,185,5415,5197,29959,29961,29960,29959,29970,29971,29969,29971,29971,29972,29972,29973,29972,29973]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Ndb5 Bb4 7. a3 Bxc3+ 8. Nxc3 d5 9. exd5 exd5 10. Bd3 O-O 11. O-O d4 12. Ne2 Bg4 13. Bg5 h6 {B45: Sicilian Four Knights} 14. Bh4 Bxe2 15. Qxe2 (15. Bxe2 Re8 16. Re1 Re4 17. Bg3 Qb6 18. b4 Rae8 19. Qd2 R4e7 20. Bf3 Ne4 21. Bxe4 Rxe4 22. Rxe4 Rxe4 {½-½ (53) Hovhannisyan,R (2621)-Kovalenko,I (2646) Tegernsee 2018}) 15... Re8 {White has an edge.} 16. Qf3 Ne5 17. Qxb7 Nxd3 18. cxd3 Qd5 {[#]} 19. Qxd5 $146 ({Predecessor:} 19. Qb4 Rab8 20. Qd2 Nd7 21. Bg3 {½-½ (53) Drugda,M (2523)-Karapchanski,D (2534) ICCF email 2010}) 19... Nxd5 20. Bg3 Re2 21. Rab1 f5 {And now ...f4 would win.} 22. Bd6 Rc8 (22... Rd8 $1 $11 {keeps the balance.} 23. Bc5 Nf4) 23. Rfe1 $16 Rxe1+ 24. Rxe1 {[%mdl 4096] Endgame KRB-KRN} Rc2 25. Rb1 Rd2 26. Be5 Rxd3 27. Kf1 $1 Kf7 28. Ke2 Rxa3 (28... Rb3 $16) 29. bxa3 $18 {[%cal Bb2a3,Ba3a4,Ba4a5][%mdl 32]} Nc3+ 30. Kd3 Nxb1 {KB-KN} 31. a4 $1 ({Stronger than} 31. Kxd4 Nxa3 32. Kc5 g5 $11) 31... Nc3 32. a5 $1 ({Much less strong is} 32. Bxd4 $6 Nxa4 33. Bxa7 Ke6 $16) 32... Nb5 33. Bxd4 g5 (33... a6 {might work better.} 34. Kc4 Nc7) 34. Bb2 Ke6 35. Kc4 $1 {[%cal Rc4b5]} Nd6+ {[#]} 36. Kc5 $1 Nb7+ {[#]} 37. Kb5 $1 Kd5 38. Ka6 Nxa5 $2 (38... Nc5+ 39. Kxa7 Kc6) 39. Kxa5 {KB-KP} Ke4 40. Bc1 {White mates.} f4 {[#]} 41. h4 $1 Kd3 (41... gxh4 42. f3+) 42. hxg5 hxg5 43. g3 Ke4 44. gxf4 gxf4 45. Ba3 Kd5 46. Ka6 {Accuracy: White = 97%, Black = 43%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.27"]
[Round "7.5"]
[White "Robson, Ray"]
[Black "Sevian, Samuel"]
[Result "0-1"]
[ECO "C65"]
[WhiteElo "2667"]
[BlackElo "2642"]
[Annotator "TA"]
[PlyCount "50"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,50,22,15,19,16,14,19,4,22,8,13,9,16,14,31,-23,-29,-23,-27,-61,-55,-51,-45,-56,-30,-60,-41,-85,-63,-263,-250,-355,-331,-882,-912,-860,-421,-29988,-29989,-29997,-29998,-29998,-29999]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Bxc6 dxc6 6. O-O {C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5} (6. Nbd2 Be6 7. O-O Bd6 8. b3 O-O 9. Nc4 Nd7 10. a4 Bxc4 11. bxc4 a5 12. Bg5 Be7 13. Be3 b6 {½-½ (52) Caruana,F (2828)-Nakamura,H (2749) chess.com INT 2019}) 6... Nd7 7. c3 O-O 8. d4 {The position is equal.} Bd6 9. Bg5 f6 10. Bh4 Qe8 $146 ({Predecessor:} 10... Qe7 11. Re1 Re8 12. Nbd2 a5 13. Nc4 Qf7 {½-½ (33) Romm,M (2445)-De Carlos Arregui,I (2411) ICCF email 2017}) 11. Nbd2 Nb6 12. h3 ({White should play} 12. Re1 $14) 12... exd4 $11 13. cxd4 Qg6 14. Kh1 Be6 15. a3 Bf4 16. Re1 f5 17. exf5 Bxf5 18. Qb3+ Nd5 19. Qxb7 $2 (19. Nc4 $1 $15) 19... Rab8 $19 20. Qxa7 (20. Qa6 {was forced.} Bxd2 21. Nxd2) 20... Rxb2 21. Nc4 $2 {[#]} (21. Bg3 Bxd2 22. Re2) 21... Bxh3 $1 {[%mdl 512]} 22. gxh3 Qd3 (22... Rb3 $142 23. Nce5 Bxe5 24. dxe5 Rbxf3) 23. Kg2 {[#]} (23. Ng1 $19 Qxc4 24. Rab1 Rxb1 25. Rxb1) 23... Bd6 $1 {[%mdl 512] Black mates.} 24. Ng1 {[#]} Rfxf2+ $1 {[%mdl 576] Remove Defender, Decoy} 25. Bxf2 Qg3+ $1 {[%mdl 64] Double Attack. Accuracy: White = 26%, Black = 72%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.27"]
[Round "7.6"]
[White "Shankland, Samuel"]
[Black "Liang, Awonder"]
[Result "1/2-1/2"]
[ECO "A45"]
[WhiteElo "2731"]
[BlackElo "2590"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,116,3,9,2,5,7,6,6,0,2,6,7,11,9,0,0,2,14,14,4,12,13,8,0,13,0,13,-7,-4,-6,-6,-6,0,-35,-31,-27,0,0,0,0,0,0,0,0,21,23,23,21,39,39,39,39,38,38,38,38,38,38,291,291,291,291,291,291,291,283,281,221,221,45,45,45,45,45,45,35,35,31,31,29,29,29,29,29,29,29,29,0,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,0,29,0,29]} 1. d4 Nf6 2. Bf4 e6 3. e3 d5 4. Nf3 Bd6 5. Be2 (5. Nbd2 Bxf4 6. exf4 O-O 7. Bd3 b6 8. Qe2 a5 9. Ne5 c5 10. c3 Ba6 11. Bxa6 Nxa6 12. O-O Nc7 13. Rad1 Qc8 14. Rfe1 {1-0 (72) Duda,J (2738)-Vitiugov,N (2719) St Petersburg 2018}) 5... O-O 6. O-O {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4} b6 7. Bxd6 $146 ({Predecessor:} 7. Ne5 c5 8. Nd2 Bb7 9. c4 Nc6 10. cxd5 Nxd5 11. Nxc6 Bxc6 12. Bxd6 Qxd6 13. dxc5 Qxc5 {1-0 (32) Admiraal,M (2453)-Roberson,P (2412) chess.com INT 2018}) 7... cxd6 8. c4 dxc4 9. Bxc4 Bb7 10. Nc3 Nc6 11. Rc1 Ne7 12. Bd3 Ned5 13. Nxd5 Bxd5 14. Qa4 a6 15. Nd2 b5 16. Qa3 Qb6 17. Rc2 e5 18. Qb4 exd4 ({Reject} 18... Bxa2 $6 19. b3 $16) 19. Qxd4 Qxd4 20. exd4 Rfc8 21. Rfc1 Rxc2 22. Rxc2 Kf8 23. a3 Ke8 24. f3 Kd7 25. Kf2 g6 26. Ne4 Nxe4+ (26... Ng8 {keeps more tension.} 27. g4 Rf8 28. Ng5 Nf6 29. Ne4 Bxe4 30. Bxe4 Nxe4+ 31. fxe4 h5) 27. fxe4 $11 {[%mdl 4096] Endgame KRB-KRB} Bb7 28. Kg3 Rc8 29. Rxc8 Bxc8 $14 {KB-KB} 30. Kf4 f6 31. e5 Ke7 32. h4 Bd7 33. b4 d5 $2 {[%mdl 8192] [#]} (33... Bc6 $14) 34. exf6+ $1 $18 Kxf6 35. g4 Be8 36. g5+ Ke6 37. Be2 Kd6 {[#]} 38. Bg4 $1 Bf7 39. Bd1 $2 (39. Bc8 $18) 39... Be6 $14 40. Bc2 Bf7 41. h5 Be8 42. h6 Bf7 43. a4 Be8 44. a5 Bf7 45. Bb1 Be8 46. Bd3 Bf7 47. Be2 Be6 48. Bd3 {And now Bxg6! would win.} Bf7 49. Bc2 Be8 50. Bd1 Bf7 51. Bg4 {Hoping for Bc8.} Be6 52. Bf3 Bf7 53. Bd1 Be6 54. Be2 Bf7 55. Bd3 $1 Be8 56. Bf1 {Threatens to win with Bh3.} Bf7 57. Be2 Be6 58. Bd3 {Black must now prevent Bxg6!} Bf7 {Accuracy: White = 72%, Black = 81%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.28"]
[Round "8.1"]
[White "Nakamura, Hikaru"]
[Black "Shankland, Samuel"]
[Result "1/2-1/2"]
[ECO "D16"]
[WhiteElo "2746"]
[BlackElo "2731"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,60,8,26,29,22,21,13,19,16,19,17,10,10,10,0,6,6,3,0,0,0,0,0,25,29,17,12,12,10,11,6,7,2,8,0,0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 e6 6. e3 c5 7. Bxc4 cxd4 {D16: Slav Defence: 5 a4: Lines with 5...Bg4 and 5...Na6} 8. exd4 Be7 (8... Nc6 9. O-O Be7 10. Bg5 O-O 11. Qd2 b6 12. d5 Na5 13. Ba2 Nxd5 14. Nxd5 exd5 15. Bxe7 Qxe7 16. b4 Nc4 17. Qxd5 {0-1 (79) Navara,D (2740)-Grandelius,N (2655) Porto Carras 2018}) 9. O-O O-O 10. d5 exd5 11. Nxd5 Nxd5 12. Bxd5 {LiveBook: 3 Games} Nd7 13. h3 $146 ({Predecessor:} 13. Be3 Nf6 {½-½ (13) Bozinovic,B (2176)-Polajzer,D (2273) Zalakaros 2018}) 13... Nf6 14. Bc4 b6 15. Qb3 Bb7 16. Bf4 Bd5 17. Rfe1 {[#] Threatens to win with Rad1.} Re8 18. Re5 Bxc4 19. Qxc4 Qd7 20. Be3 Bd6 21. Rxe8+ Rxe8 22. Qb5 Bb8 23. Qxd7 Nxd7 24. a5 {The position is equal.} bxa5 25. Rxa5 Ne5 26. Nxe5 Rxe5 27. Ra1 h5 28. Kf1 Rb5 29. Bxa7 Bxa7 30. Rxa7 Rxb2 {Accuracy: White = 67%, Black = 64%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.28"]
[Round "8.2"]
[White "Caruana, Fabiano"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "E04"]
[WhiteElo "2828"]
[BlackElo "2762"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,70,23,39,0,12,0,12,-39,0,0,0,-19,5,3,3,0,3,0,0,0,0,0,0,0,0,0,0,-35,-21,-57,-35,-27,-34,-94,7,7,7,6,4,5,5,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 c5 6. O-O Nc6 7. Ne5 Bd7 8. Nxc4 cxd4 9. Bf4 Nd5 10. Nd6+ Bxd6 11. Bxd6 Nde7 12. Nd2 O-O 13. Qb3 b6 {[%cal Bb7b6,Bb6b5,Bb5b4][%mdl 32] LiveBook: 3 Games. E04: Open Catalan: 5 Nf3} (13... Bc8 14. Nc4 Re8 15. Bc5 Nf5 16. e4 dxe3 17. fxe3 Qg5 18. Ba3 e5 19. Nd6 Nxd6 20. Bxd6 Nd8 21. Kh1 {0-1 (42) Gelfand,B (2691)-Karpov,A (2710) Monte Carlo 1999}) 14. Nc4 {[%mdl 1024] White has compensation.} Rc8 15. Qa3 $146 ({Predecessor:} 15. Rfd1 Kh8 16. Qa3 Re8 17. Bxe7 Rxe7 18. Nd6 Rc7 19. Nb5 Rc8 20. Nxd4 Nxd4 21. Rxd4 e5 22. Rd2 Rc7 23. Rad1 Kg8 24. Qd6 Re6 25. Qxc7 Qxc7 26. Rxd7 {1-0 (26) Krasenkow,M-Shestakov,S Moscow 1987}) 15... b5 16. Nd2 ({Better is} 16. Ne5 $11) 16... b4 17. Qa6 e5 18. Rac1 Be6 19. Bxe7 Nxe7 20. Qxa7 Nd5 21. Rc5 Qb6 $36 {[%mdl 2048] Black has the initiative.} 22. Qxb6 Nxb6 23. Rb5 Rc2 24. Nf3 Nd7 25. Rxb4 Bxa2 26. Re1 Be6 27. h3 f6 28. e3 d3 {Strongly threatening ...d2.} 29. Rd1 {[#]} (29. Bf1 $1 $15) 29... Rb8 (29... Rfc8 $1 $17 {...Rc1 is the strong threat.} 30. Rxd3 {[#]} e4 $1 {[%mdl 512]} 31. Rxe4 Nc5) 30. Rxb8+ $11 {The position is equal.} Nxb8 31. Ne1 Rxb2 32. Nxd3 Rb5 33. Nc5 Rxc5 34. Rd8+ Kf7 {And now ...Nc6 would win.} 35. Rxb8 Rc1+ {Precision: White = 34%, Black = 47%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.28"]
[Round "8.3"]
[White "Sevian, Samuel"]
[Black "Dominguez Perez, Leinier"]
[Result "0-1"]
[ECO "D41"]
[WhiteElo "2642"]
[BlackElo "2739"]
[Annotator "TA"]
[PlyCount "124"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,124,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-41,12,0,0,0,0,0,0,0,0,0,0,0,0,-14,0,-3,-3,-2,-3,-3,-3,-3,-3,-4,0,0,0,-33,-33,-33,-33,-154,-154,-154,-154,-154,-154,-154,-154,-250,-250,-250,-249,-495,-495,-1380,-1294,-1056,-1050,-29964,-29967,-29967,-29967,-29967,-29969,-29967,-29969,-29970,-29974,-29975,-29976,-29980,-29981,-29981,-29982,-29982,-29983,-29983,-29984,-29984,-29985,-29985,-29985,-29986,-29987,-29987,-29988]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 Nd7 12. O-O b6 13. Rad1 Bb7 14. Rfe1 Rc8 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5} 15. Bb3 Re8 16. d5 (16. h3 Nf6 17. Qf4 Nh5 18. Qh2 h6 19. h4 a5 20. g4 Nf6 21. Qf4 b5 22. Ne5 {½-½ (50) Adhiban,B (2683)-Ding,L (2812) Astana 2019}) 16... exd5 {LiveBook: 3 Games. The position is equal.} 17. exd5 Nc5 18. d6 Bxf3 $1 19. Rxe8+ Qxe8 20. gxf3 {Hoping for d7.} Qc6 $146 ({Predecessor:} 20... Qd7 21. Re1 Ne6 22. f4 {½-½ (49) Jaeckel,C (2394)-Kveinys,V (2131) ICCF email 2011}) 21. Bd5 Qd7 22. Qf4 Rd8 23. Be4 g6 24. h4 {[%cal Bh2h4,Bh4h5][%mdl 32]} Qe6 {[#]} ({Black should play} 24... Ne6 $15 25. Qe5 Qa4) 25. h5 $1 {[%mdl 512]} Nd7 (25... gxh5 26. Qg5+) 26. Bd5 Qf6 27. Qe3 {And now Qe7 would win.} Nc5 28. Rd4 gxh5 (28... Rxd6 29. Bxf7+ $1 {[%mdl 512]} Kxf7 30. Rf4 $16) 29. Rf4 Qg6+ (29... Qxd6 $2 30. Bxf7+ Kg7 31. Qc3+ Kf8 32. Rf5 $18) 30. Kh1 Ne6 ({But not} 30... Rxd6 $2 31. Qe8+ Kg7 32. Rxf7+ Kh6 33. Qe3+ Qg5 34. Rxh7+ $1 {[%mdl 512]} Kg6 35. Rg7+ $1 {[%mdl 512]} Kxg7 36. Qxg5+ $18) ({Don't go for} 30... Qxd6 $2 31. Bxf7+ Kg7 32. Qc3+ Kf8 33. Rf5 $18) 31. Rc4 h6 ({Don't blunder} 31... Rxd6 $2 32. Rc8+ Nd8 33. Qe8+ Kg7 34. Rxd8 $18) 32. Bxe6 (32. Qe5 {looks sharper.} Qg5 33. f4 Qh4+ 34. Kg2 Qg4+ 35. Kh2) 32... Qxe6 33. Qxe6 fxe6 $11 {[%mdl 4096] Endgame KR-KR} 34. Rc7 a5 35. Rc6 $1 b5 36. Rb6 a4 37. Kg2 Kf7 38. a3 Rg8+ 39. Kf1 $1 Rg5 {aiming for ...Ke8.} 40. d7 (40. Rb7+ $15 Kf6 41. Rh7) 40... Ke7 $1 $17 {[%cal Re7d7]} 41. Rxe6+ Kxd7 42. Rxh6 Rc5 43. f4 Kc7 $1 44. f5 (44. Ke2 $17) 44... Rxf5 $19 45. Ke2 Kb7 $1 46. f3 $2 {[#]} (46. Rd6) 46... b4 $1 {[%mdl 512]} 47. axb4 (47. Rh7+ $142 Kb6 48. axb4) 47... a3 {...a2 is the strong threat.} 48. Rd6 Rf8 49. Kf2 Ra8 $1 {Black mates.} 50. Rd1 Kb6 51. Kg3 Kb5 $1 {[%cal Rb5b4]} 52. Kh4 {[#]} Rf8 $1 {[%cal Rf8f3]} (52... a2 $2 53. Ra1 $19) 53. Rf1 {[#]} Rf5 $1 54. f4 Kxb4 55. Rf2 Ra5 56. Ra2 Kb3 57. Ra1 a2 58. Rf1 a1=Q 59. Rxa1 Rxa1 60. Kxh5 Rf1 61. Kg5 Kc4 62. f5 Kd5 {Precision: White = 53%, Black = 85%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.28"]
[Round "8.4"]
[White "Lenderman, Aleksandr"]
[Black "Xiong, Jeffery"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2637"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "142"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,142,-48,-39,-37,-60,-52,-52,-42,-14,-36,-29,-40,-46,-50,-35,-50,-43,-65,-14,-14,-11,-70,-70,-70,-70,-70,-70,-95,-95,-99,-99,-99,-26,-99,-99,-99,-99,-99,-99,-99,0,-99,-99,-99,-22,-113,-113,-113,-113,-113,-113,-113,-113,-113,-113,-114,-113,-114,-114,-114,0,0,0,-114,-113,-113,-8,-113,-113,-113,-30,-113,-113,-113,-113,-113,-113,-114,-114,-114,-114,-114,-114,-114,-8,-114,-114,-114,-8,-114,-114,-114,-114,-114,-114,-114,0,-114,-114,-114,-8,-8,-14,-114,0,0,0,-114,-114,-114,-114,-114,0,-72,0]} 1. Nf3 Nf6 2. c4 c5 3. b3 g6 4. Bb2 Bg7 5. g3 b6 6. Bg2 Bb7 7. O-O O-O 8. Nc3 d5 9. Nxd5 Nxd5 10. Bxg7 Kxg7 11. cxd5 Qxd5 12. d4 Na6 13. e4 {A30: Symmetrical English: Double Fianchetto and Hedgehog} Qd6 14. d5 e6 15. Nd2 exd5 {LiveBook: 4 Games} 16. exd5 Rad8 ({But not} 16... Bxd5 $2 17. Nc4 $18) 17. Nc4 Qf6 $1 18. Ne3 Nc7 19. Qd2 (19. b4 $5) 19... h5 20. Rac1 Rd7 {[#]} 21. b4 $146 Nxd5 22. bxc5 {[%cal Rg2d5]} Rfd8 23. cxb6 Nxe3 (23... Nf4 $15 24. Nf5+ Qxf5 25. Qxf4 Qxf4 26. gxf4 Bxg2 27. Kxg2 axb6) 24. Qxe3 $11 Rd3 25. Qf4 (25. Qe1 $11 Bxg2 26. Kxg2) 25... Qxf4 $15 26. gxf4 Bxg2 27. Kxg2 {And now b7 would win.} axb6 {[%mdl 4096] Endgame KRR-KRR} 28. Rc6 Ra8 29. Rxb6 Rxa2 30. Rb4 Kf6 (30... h4 $1 $17 31. h3 Rc3) 31. Rc4 (31. h4 $11 {remains equal.}) 31... h4 $1 $17 32. h3 Rg3+ 33. Kh2 Rf3 34. Kg2 Rg3+ 35. Kh2 Re2 36. Ra4 Kf5 (36... Rc2 $17 37. Rd4 Rgc3) 37. Rb4 (37. Ra7 $11) 37... Rf3 38. Kg2 Rxf4 39. Rxf4+ Kxf4 {KR-KR} 40. Ra1 f5 41. Ra6 g5 42. Rh6 Re5 43. Rh5 Re8 44. Rh7 Ke4 (44... Ra8 $17 45. Rg7 Ra4) 45. Rg7 $11 Kf4 (45... Rh8 $11) 46. Rh7 $1 $17 Ke5 47. Rh5 Kf6 {[#]} ({Better is} 47... Rg8 $1 $17 {White should prevent ...Ke4.} 48. Kf3 Kf6 49. Rh6+ Kg7) 48. Rh6+ (48. f4 $1 $11 {[%mdl 512]}) 48... Kg7 $1 {[%cal Rg7h6]} 49. Ra6 Kf7 (49... Re2 $17 50. Ra5 Kf6) 50. Ra5 (50. f4 $1 $11) 50... Kf6 51. Ra6+ Re6 52. Ra4 Rb6 53. Rc4 Rb3 54. Ra4 f4 55. f3 Rb2+ 56. Kg1 Ke5 (56... Rd2 $17 57. Ra8 Rd5 58. Ra6+ Ke5) 57. Re4+ (57. Ra5+ $11 Kf6 58. Ra6+ Kf7 59. Ra5) 57... Kd5 58. Re8 Kd4 (58... Rb5 $17 59. Re4 Rb3) 59. Re7 (59. Re4+ $11 {was the only way to keep the balance.} Kd5 60. Re8) 59... Kd3 60. Re8 Re2 61. Ra8 Re5 62. Kf2 Re2+ 63. Kg1 $1 Rc2 64. Re8 Kd2 ({Black should play} 64... Kd4 $17 65. Rg8 Rc1+ 66. Kg2 Rc2+ 67. Kg1 Rc5) 65. Re5 $11 Rb2 66. Re8 (66. Rxg5 $11 Ke3 67. Rh5) 66... Kd1 ({Black should try} 66... Kd3 $17 67. Re5 Re2 68. Rxg5 Ke3) 67. Re5 Kd2 (67... Rd2 $11) 68. Re8 $17 Kd3 69. Re5 {[#]} Re2 $1 {[%cal Re2e5]} 70. Ra5 Re8 (70... Ke3 $17 71. Ra3+ Kd4 72. Ra4+ Ke5 73. Ra5+ Kf6 74. Ra6+ Kf5) 71. Kf2 {[#]} (71. Rxg5 $11 {keeps the balance.} Re1+ 72. Kg2) 71... Re2+ {Accuracy: White = 55%, Black = 45%.} (71... Rg8 $1 $17) 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.28"]
[Round "8.5"]
[White "Liang, Awonder"]
[Black "Robson, Ray"]
[Result "1/2-1/2"]
[ECO "C55"]
[WhiteElo "2590"]
[BlackElo "2667"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,98,0,0,7,26,27,29,-22,-33,-36,-27,-26,-15,-14,-19,-18,-16,-12,-13,-12,-25,-35,-25,-18,-18,-14,-12,-22,0,0,0,0,0,-6,0,0,-6,-2,-2,-12,-1,-8,-4,-5,-5,-5,0,-8,-7,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d4 exd4 5. e5 Ne4 6. Qe2 Nc5 $1 ({Much worse is} 6... Bb4+ $6 7. Kd1 $16) 7. O-O {C56: Two Knights: 4 d4 exd4 5 0-0 Nxe4} (7. c3 d3 8. Qe3 Be7 9. b4 Ne6 10. O-O d5 11. exd6 cxd6 12. Qxd3 O-O 13. Nbd2 a5 14. Rb1 axb4 15. cxb4 Nxb4 16. Rxb4 {0-1 (41) Vitiugov,N (2719)-Wang,H (2730) St Petersburg 2018}) 7... Be7 8. Rd1 d5 9. Bb5 (9. exd6 $142 $1 cxd6 10. c3 (10. Nxd4 Nxd4 11. Rxd4 O-O $14)) 9... Bg4 $146 ({Predecessor:} 9... O-O 10. Bxc6 bxc6 11. Nxd4 Qe8 12. c4 f6 13. Nc3 fxe5 14. Qxe5 Qf7 {0-1 (24) Brandenburg,D (2421)-Postny,E (2609) Hoogeveen 2006}) 10. Rxd4 Bxf3 $1 11. Qxf3 O-O $1 {[%csl LRd4,LRe5]} 12. Rd1 Nxe5 13. Qxd5 c6 {[%mdl 64] [#] Double Attack} 14. Qxd8 Raxd8 15. Be2 Ne6 16. Rf1 Rfe8 17. Nd2 Bg5 {The position is equal.} 18. Nb3 {[#] Hoping for f4.} Bxc1 19. Rfxc1 Nd4 20. Nxd4 Rxd4 21. Rd1 Red8 22. Rxd4 Rxd4 23. Rd1 Rxd1+ 24. Bxd1 $11 {[%mdl 4096] Endgame KB-KN} f5 25. h4 f4 26. b3 Kf7 27. g3 Ke6 28. c3 Kd5 29. Kf1 h6 30. Ke2 g5 31. hxg5 hxg5 32. gxf4 gxf4 33. Bc2 a5 34. Bh7 c5 35. Bg8+ Kc6 36. a3 b6 37. Kd2 Kd6 38. Ke2 Kd7 39. Bc4 Kc7 40. a4 Kd6 41. Kd2 Kd7 42. Ke2 Ke7 43. Bg8 Kf6 44. Bd5 Kf5 45. Bg8 Kf6 46. Bd5 Ke7 47. Bc4 Kd6 48. Bg8 Ng4 49. Bc4 {Black must now prevent Kf3.} Ne5 {Accuracy: White = 83%, Black = 68%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.28"]
[Round "8.6"]
[White "Gareyev, Timur"]
[Black "Akobian, Varuzhan"]
[Result "1/2-1/2"]
[ECO "E21"]
[WhiteElo "2557"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "127"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,127,2,0,1,0,0,0,0,2,9,1,0,8,-4,18,-5,-5,-10,-13,-14,-7,-6,-14,-5,0,-4,0,0,0,-22,-29,-28,-14,-31,-16,-33,-19,-86,-87,-77,-85,-79,-84,-70,-72,-68,-3,-5,-8,-8,-3,-3,0,0,0,0,0,-6,0,0,0,-8,0,0,0,-5,-6,-24,-25,-16,-8,-23,-14,-15,0,-33,-20,-15,0,-37,-31,-32,-24,-29,-10,-15,0,-44,-8,-8,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 e6 2. c4 Nf6 3. Nc3 Bb4 4. Nf3 b6 5. Qb3 a5 6. Bg5 Bb7 7. e3 h6 8. Bh4 {E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7} g5 9. Bg3 Ne4 10. Bd3 d6 11. Bxe4 Bxe4 12. O-O-O Bxc3 13. Qxc3 Nd7 14. Rhg1 Bxf3 $146 15. gxf3 Qf6 16. f4 O-O-O 17. Qd3 gxf4 18. Bxf4 e5 19. Bg3 Qf3 20. c5 Qc6 21. Qf5 exd4 22. exd4 bxc5 23. Kb1 Kb8 24. f3 Rde8 25. Qxf7 (25. dxc5 $11 Nxc5 26. Bf2) 25... c4 $17 26. Rge1 Ref8 27. Qh5 Nb6 28. Qxa5 Rxf3 29. d5 Qa4 (29... Qd7 $15) 30. Qxa4 $11 Nxa4 31. Re4 $132 {[%mdl 2048] White puts up resistance} Nb6 32. Bf4 Rf8 33. Bxh6 R8f5 34. h4 Rh3 35. Bg7 Rxd5 36. Rxd5 Nxd5 {[%mdl 4096] Endgame KRB-KRN} 37. Kc1 c3 38. bxc3 Nxc3 39. Rb4+ Kc8 40. Kb2 Nd5 41. Re4 Kb7 42. Bh6 Nb6 43. Bg5 c5 44. Bd8 Rh2+ 45. Kb3 Rh3+ 46. Kb2 Nd5 47. a4 Kc6 48. Bg5 Rh2+ 49. Kb3 Rh3+ 50. Kb2 Nc3 51. Rg4 {The position is equal.} Nd1+ 52. Kc2 Ne3+ 53. Bxe3 $1 Rxe3 {KR-KR} 54. h5 Rh3 55. Rg5 Rh4 56. Kb3 Rh3+ 57. Kc2 Kb6 58. Rg6 Rxh5 59. Rxd6+ Ka5 60. Kc3 Kxa4 61. Kc4 {[%cal Rd6a6] [#]} Ka3 62. Rc6 Kb2 63. Rxc5 Rxc5+ 64. Kxc5 {Accuracy: White = 68%, Black = 61%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.29"]
[Round "9.1"]
[White "Robson, Ray"]
[Black "Nakamura, Hikaru"]
[Result "0-1"]
[ECO "B78"]
[WhiteElo "2667"]
[BlackElo "2746"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,110,33,43,37,50,47,52,50,46,23,29,33,28,19,25,9,24,0,0,0,0,0,0,-32,-38,-42,-31,-44,-25,-48,-34,-130,-107,-123,-109,-301,-319,-361,-324,-322,-328,-359,-361,-351,-339,-353,-332,-316,-306,-280,-279,-906,-854,-1056,-1025,-1243,-1262,-29948,-29956,-29949,-29952,-29983,-29956,-12559,-12190,-2213,-927,-920,-920,-913,-906,-898,-891,-884,-877,-877,-800,-877,-877,-815,-779,-29951,-29946,-29961,-29955,-29967,-29968,-29968,-29969,-7264,-5289]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 O-O 8. Qd2 Nc6 9. Bc4 Bd7 10. O-O-O Rb8 11. Bb3 Na5 12. Bh6 {B77: Sicilian Dragon: Yugoslav Attack, 9 Bc4 sidelines} (12. h4 b5 13. h5 Nc4 14. Bxc4 bxc4 15. hxg6 fxg6 16. Bh6 Qb6 17. b3 Bxh6 18. Qxh6 Qa5 19. Kb2 Rfc8 20. Nd5 cxb3 21. axb3 Kf7 22. Qd2 Qxd2 23. Rxd2 {½-½ (46) Fedoseev,V (2724)-Nakamura,H (2787) Moscow 2018}) 12... Bxh6 13. Qxh6 b5 14. Nd5 {White is slightly better.} Nxb3+ 15. Nxb3 e5 16. Nxf6+ Qxf6 17. h4 Rb6 18. h5 Qe7 19. hxg6 $146 (19. Qe3 {is interesting.} Be6 20. Kb1 Rc6 21. hxg6 fxg6 22. Na5) ({Predecessor:} 19. Qe3 Be6 20. Kb1 Rc6 21. Rd2 {½-½ (21) Yloenen,O (2423)-Sikorsky,H (2470) ICCF email 2012}) 19... fxg6 20. Qe3 Be6 21. Rhf1 Rc6 22. f4 Qc7 23. Rd2 a5 {[%cal Ba7a5,Ba5a4][%mdl 32] Strongly threatening ...a4.} 24. Kb1 a4 25. Nc1 b4 26. Rdf2 ({White should try} 26. f5 $15) 26... exf4 $1 $17 27. Rxf4 Rc8 $36 {[%mdl 2048] Black is really pushing.} 28. Rf6 $2 (28. Nd3 $17 {is a better defense.} Rxc2 29. Nxb4) 28... Rxc2 $19 29. Rxe6 {Ref6 is the strong threat.} Qc4 (29... Rxg2 30. Qd3 $14) 30. Ref6 {Hoping for R6f2.} a3 $1 31. bxa3 bxa3 32. Qxa3 {[#] And now Qb3 would win.} Rxc1+ $1 {[%mdl 512]} 33. Rxc1 (33. Qxc1 Qxe4+) 33... Qxe4+ {[%mdl 64] Double Attack} 34. Kb2 Qe5+ 35. Rc3 {[#]} Rb8+ $1 ({Don't do} 35... Qxf6 36. Qb3+ Kh8 37. a4 $17) 36. Kc2 $2 (36. Ka1 Qxf6 37. Qc1) 36... Qxf6 {[%mdl 4096] Endgame KQR-KQR} 37. Rf3 Qd4 38. Rb3 Qe4+ 39. Kc1 Qe1+ 40. Kc2 Qe2+ 41. Kb1 Qd1+ 42. Qc1 Rxb3+ 43. axb3 Qxb3+ {KQ-KQ} (43... Qxc1+ $142 44. Kxc1 Kf7) 44. Ka1 Qa4+ 45. Kb2 Qb5+ 46. Ka1 Qc5 47. Qd2 h5 48. Kb1 Kg7 49. Qb2+ Qe5 50. Qb7+ Kh6 51. Kc1 d5 52. Kd1 Qe4 53. Qb2 Kg5 54. Qd2+ Kg4 55. Qh6 g5 {Accuracy: White = 36%, Black = 83%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.29"]
[Round "9.2"]
[White "Dominguez Perez, Leinier"]
[Black "Liang, Awonder"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2739"]
[BlackElo "2590"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,119,11,11,0,41,38,25,11,18,21,20,19,31,33,31,26,36,41,32,26,21,29,35,29,39,25,29,37,45,9,129,134,119,127,129,114,122,128,131,118,143,99,112,102,123,111,121,101,102,91,91,33,82,68,62,53,61,0,61,61,68,68,68,66,68,76,81,39,135,120,149,150,147,146,165,167,175,131,324,324,334,323,360,360,356,346,776,754,717,797,1926,1571,1168,943,6732,6412,29990,3693,29991,29992,29995,29996]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. O-O O-O 8. c4 c6 9. Qc2 Na6 10. a3 Bg4 {Strongly threatening ...Bxf3.} 11. Ne5 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves} Bf5 (11... Bxe5 $5 12. dxe5 Nac5 $11) 12. b4 {[#]} c5 $1 {[%mdl 512]} (12... Nc7 13. f3 Bg6 14. c5 Bxe5 15. dxe5 Ng5 16. Bb2 d4 17. f4 Nd5 18. fxg5 Ne3 {1-0 (42) Anand,V (2767)-Caruana,F (2811) Wijk aan Zee 2018}) 13. cxd5 {White has an edge.} (13. bxc5 Bxe5) 13... cxd4 14. Bxe4 Rc8 $1 {[%cal Rc8c2] [#]} 15. Nc6 $146 ({Predecessor:} 15. Qd3 Bxe4 16. Qxe4 Re8 17. f4 f6 18. Nd2 fxe5 {1-0 (59) Danin,A (2565)-Lokander,M (2357) Prague 2015}) 15... Bxe4 16. Qxe4 bxc6 17. dxc6 Re8 18. Qf3 Qb6 19. Nd2 Rxc6 ({Avoid the trap} 19... Qxc6 $2 20. Qxc6 Rxc6 21. b5 $18) 20. Nb3 Rc3 21. Qd1 $1 d3 22. Bd2 Rc2 23. g3 Bf8 24. Qf3 Nc5 {[#]} (24... Qg6 $11) 25. Be3 $1 $16 {[%mdl 64] Pin} Qb7 26. Qxb7 Nxb7 27. Rfd1 Rc3 28. Nc1 a5 29. Rxd3 ({Don't play} 29. Nxd3 Rd8 $14) 29... Rc2 30. Rd7 Nd6 31. Nd3 Nc4 32. Bf4 f6 33. bxa5 Nxa5 34. a4 Ra8 35. h4 (35. Bd6 $16) 35... Rc4 36. Be3 Nc6 37. Rc7 Bd6 38. Rd7 Bf8 $1 39. Nb2 Rc2 40. Rb7 Nb4 41. Nd1 $1 Rc6 42. Rb6 Rc7 43. Bf4 Rc2 ({Better is} 43... Rca7 $1 $14) 44. Ne3 $36 {[%mdl 2048] Keeping Black busy.} Rd2 45. Rb5 Rd7 46. a5 Nc6 47. Nc4 {aiming for Nb6.} Nd4 48. Rb8 Ra6 $2 (48... Rxb8 $16 49. Bxb8 Nc6) 49. Bd6 $18 {[%csl Gd6][%cal Rb8f8]} Ne6 50. Re8 Rdxd6 51. Nxd6 Rxd6 52. a6 Nc7 $2 (52... Rxa6 53. Rxa6 Nc7) 53. a7 Nxe8 54. a8=Q {Threatening mate with Qa2+.} Nc7 55. Qc8 Ne6 56. Ra7 Nd8 57. h5 Rd4 {[#]} 58. Kg2 (58. h6 $142 $1 Kh8 (58... gxh6 59. Qc7) 59. Qc7 Kg8 60. hxg7 Ba3 61. Rxa3 Nc6 62. Qxc6 Rd1+ 63. Kg2) 58... Rd6 {[#]} 59. h6 $1 gxh6 60. Qc7 {Accuracy: White = 80%, Black = 50%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.29"]
[Round "9.3"]
[White "Akobian, Varuzhan"]
[Black "Caruana, Fabiano"]
[Result "0-1"]
[ECO "A80"]
[WhiteElo "2625"]
[BlackElo "2828"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,98,24,20,0,14,2,34,12,94,0,0,0,14,-33,-30,-57,-39,-32,0,-25,0,-45,-35,-80,-30,-79,-22,-123,-112,-127,-147,-197,-200,-205,-203,-219,-228,-281,-294,-283,-118,-118,-116,-107,-61,-74,-71,-83,-63,-72,-71,-110,-106,-125,-114,-115,-122,-121,-128,-204,-197,-314,-313,-301,-243,-227,-241,-213,-216,-322,-320,-454,-455,-429,-447,-442,-439,-400,-394,-508,-504,-462,-333,-326,-326,-303,-319,-496,-489,-487,-475]} 1. d4 f5 2. Nc3 Nf6 3. Bg5 d5 4. e3 e6 5. Nf3 a6 (5... Be7 6. Bd3 Ne4 7. Bxe7 Qxe7 8. O-O O-O 9. Ne2 Nd7 10. c4 c6 11. Qc2 Kh8 12. a3 a5 13. Rab1 a4 14. Nc3 Nxc3 15. Qxc3 g5 16. Rbc1 g4 17. Nd2 Nf6 18. Kh1 Bd7 {1-0 (51) Duda,J (2738)-Potapov,P (2516) St Petersburg 2018}) 6. Ne5 {A80: Dutch Defence: Unusual White second moves} c5 7. g4 cxd4 $146 ({Predecessor:} 7... fxg4 8. Nxg4 Be7 9. Bxf6 Bxf6 10. Nxf6+ Qxf6 11. dxc5 O-O 12. Qd2 Nd7 13. Bg2 {½-½ (38) Schwenk,H (2164)-Arnold,G (2221) ICCF email 2016}) 8. exd4 {White is slightly better.} Qb6 (8... fxg4 $11 9. Nxg4 Be7) 9. Na4 ({White should try} 9. gxf5 $1 $16 {Strongly threatening Bxf6.} Nc6 10. Nxc6 (10. Bxf6 Qxb2 11. Qh5+ g6 $18) 10... bxc6 11. Na4 Qa5+ 12. c3) 9... Qa5+ $11 10. c3 {Black must now prevent gxf5.} fxg4 11. Bxf6 gxf6 12. Nxg4 Nd7 13. Ne3 h5 14. Bd3 f5 15. b4 Qc7 16. Rc1 b6 17. Qe2 Kf7 (17... Kd8 $17 {next ...Bxb4! is good for Black.} 18. Qd2 Bb7) 18. Kd1 (18. O-O $11 {keeps the balance.}) 18... Nf6 $1 $17 19. Nb2 {[#]} Bd7 $1 20. c4 Rc8 ({Don't do} 20... Bxb4 21. cxd5 Qf4 22. dxe6+ Bxe6 23. Bc4 $17) 21. Rc2 {[#]} Qf4 $1 ({But not} 21... Bxb4 22. Qf3 $17) 22. cxd5 Bxb4 23. Bc4 {aiming for Nd3.} exd5 ({Resist} 23... Qxd4+ 24. Qd3 $17) 24. Nxd5 Nxd5 (24... Qxd4+ $19 25. Kc1 Rxc4 {[%mdl 64] Remove Defender} 26. Rxc4 Qxd5) 25. Bxd5+ Kf6 26. Qe3 Bd6 27. Qxf4 Bxf4 28. Nd3 Bb8 29. Rxc8 Bxc8 30. Ke2 Re8+ 31. Kd2 Rd8 32. Rc1 Bxh2 33. Bf3 Be6 34. Rc6 (34. Rh1 $17 Bd6 35. a4) 34... Rd6 $19 35. Rc1 (35. Rxd6 $142 Bxd6 36. Bxh5) 35... Rxd4 36. Ke3 Rd8 37. Bxh5 Bxa2 38. f4 Bd5 39. Ne5 (39. Rb1 $142) 39... Rh8 40. Bf3 (40. Rd1 {was necessary.}) 40... Rh4 41. Nd3 Rh3 42. Ne5 Be4 43. Rc8 Rh4 44. Nd3 Bg1+ 45. Ke2 Bxd3+ 46. Kxd3 Rxf4 47. Bb7 a5 48. Rf8+ (48. Rc4 $142 Rf1 49. Bc6) 48... Ke7 49. Rg8 Bc5 {Accuracy: White = 41%, Black = 50%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.29"]
[Round "9.4"]
[White "So, Wesley"]
[Black "Lenderman, Aleksandr"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2762"]
[BlackElo "2637"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,119,17,27,17,26,12,8,15,33,-3,29,20,25,27,39,21,44,44,22,33,68,18,57,35,56,22,39,47,55,40,104,102,111,122,124,118,145,143,240,210,212,214,209,213,198,184,232,39,19,0,0,0,0,0,0,0,0,-15,-15,-20,-15,-87,46,40,35,40,182,185,179,89,100,71,263,281,264,0,265,284,301,308,306,299,312,295,302,296,298,293,581,556,797,791,739,661,1435,1470,1347,1360,1387,1283,1320,1089,1462,1474,1579,1468,29971,29969]} 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 Be7 7. Bd3 Nbd7 {[%cal Bb8d7,Bd7f8,Bf8e6][%mdl 32]} 8. h3 {D35: Queen's Gambit Declined: Exchange Variation} (8. Nge2 Nf8 9. O-O Ne6 10. Bh4 g6 11. b4 a6 12. Na4 O-O 13. Nc5 Ng7 14. Rc1 Nfe8 15. Bxe7 Qxe7 16. a4 Nd6 {½-½ (43) Ding,L (2813)-Fedoseev,V (2724) Wijk aan Zee 2019}) 8... Nf8 9. Qc2 Ne6 10. Bh4 {The position is equal.} g6 11. Nge2 Ng7 12. f3 O-O 13. O-O-O b5 14. g4 a5 15. Nf4 $146 ({Predecessor:} 15. e4 Be6 16. e5 Nd7 17. Bxe7 Qxe7 18. f4 f5 19. g5 Nb6 {1-0 (38) Brond,V-Gaete,R Cordoba 1970}) 15... a4 16. Kb1 Ne6 17. Nce2 Nxf4 18. exf4 (18. Nxf4 {feels hotter.} Qb6 19. e4 Ra7 20. Rhe1 dxe4 21. fxe4 b4 22. Bc4) 18... Bd7 19. f5 b4 20. Qc1 Ne8 21. Bg3 a3 (21... Bg5 $14 22. Bf4 Bxf4 23. Qxf4 (23. Nxf4 b3 $11) 23... Qf6) 22. b3 $1 $16 Bg5 23. Qc2 $1 Bh4 24. Be5 $1 f6 25. Bf4 gxf5 (25... g5 $16) 26. gxf5 $18 (26. Bxf5 Rf7 $16) 26... Kh8 27. Rdg1 Qe7 28. Rg4 $1 {[%cal Rg4h4]} Bg5 29. Rhg1 $1 Rc8 30. Qd2 $2 (30. Bxg5 fxg5 31. Rxg5 Qe3 $14) (30. Rxg5 $18 fxg5 31. Be5+ (31. Bxg5 Rf6 $14) (31. Rxg5 c5 $16) 31... Nf6 32. Qc1 (32. Rxg5 c5 $14)) 30... Ng7 $1 $14 31. Bxg5 fxg5 32. Rxg5 Nxf5 33. Rh5 {Hoping for Nf4.} Rf6 $1 34. Rgg5 {[%cal Rg5f5]} Re8 35. Nc1 {[%cal Rg5f5]} Ref8 36. Bc2 R8f7 37. Qf4 {[#]} (37. Rg2 $1 $11 {was the only way to keep the balance.}) 37... Qe3 (37... Qf8 $1 $17) 38. Qb8+ {[%mdl 64] Double Attack} Rf8 39. Qxb4 R6f7 (39... h6 $14) 40. Qxa3 $18 Qxd4 41. Rg4 (41. Ne2 $18 {is more deadly.} Qe3 42. Qb2+ d4 43. Be4) 41... Qc3 $16 42. Rf4 Ne3 $2 {[#]} (42... Qe3 $16 43. Qb2+ d4) 43. Bxh7 $1 $18 {Black must now prevent Rxf7.} Rxf4 44. Qd6 $2 $40 {[%mdl 128] White mounts an attack.} (44. Bd3+ $18 Kg8 45. Rg5+ Kh8 46. Qd6) 44... R8f7 $2 {[%mdl 8192]} (44... Qg7 $1 $11 {and Black has nothing to worry.}) 45. Bd3+ Kg8 46. Rg5+ Rg7 47. Qxf4 Nd1 {[%csl Gd1][%cal Rc3b2]} 48. Rxg7+ Kxg7 {[%csl Gd1][%cal Rc3b2]} 49. Qh2 ({Less strong is} 49. Qg3+ Kf7 $16) 49... Qd4 50. Qd2 Nf2 $2 (50... Ne3 {might work better.} 51. Ne2 Qe5) 51. Qg5+ Kf7 52. Bg6+ Kf8 53. h4 Nd1 {[%csl Gd1][%cal Rd4b2]} 54. Qd8+ Kg7 55. Qxd7+ {[%mdl 64] Double Attack} Kxg6 56. Qg4+ Qxg4 57. fxg4 Ne3 58. g5 Nf5 59. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Nxh4 60. a5 {Accuracy: White = 61%, Black = 45%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.29"]
[Round "9.5"]
[White "Xiong, Jeffery"]
[Black "Sevian, Samuel"]
[Result "1/2-1/2"]
[ECO "E04"]
[WhiteElo "2663"]
[BlackElo "2642"]
[Annotator "TA"]
[PlyCount "206"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,206,0,-16,-14,-9,-22,-47,-25,-25,-14,-47,-52,-36,-8,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-33,-13,-16,-16,-16,-12,-12,-11,-11,-11,-12,-12,-12,-12,-12,-11,-11,-11,-11,-11,-12,-12,-12,-12,-22,-22,-22,-22,-22,-22,-22,-22,-22,-22,-33,-22,-33,-22,-22,-22,-22,-22,-22,-22,-33,0,-22,-22,-22,-8,-22,-22,-22,-22,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,0,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,-33,0,0,0,-33,-33,-33,-33,-33,-33,-33,0]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. g3 dxc4 5. Bg2 c5 6. O-O Nc6 7. Ne5 {[%cal Bf3e5,Be5c4,Bc4d6][%mdl 32]} Bd7 8. Nxc4 cxd4 9. Bf4 Be7 {E04: Open Catalan: 5 Nf3} 10. Nd6+ Kf8 11. Nxb7 Qb6 12. Nd6 Qc5 13. b4 Qxb4 14. a3 {LiveBook: 5 Games} Qc5 15. Nd2 e5 $1 {[%cal Re5f4]} (15... Bxd6 $6 16. Rc1 $16 (16. Nb3 Qb6 $16)) 16. N2e4 Nxe4 17. Nxe4 {[#]} Qb6 $146 18. Bg5 f6 19. Rb1 Qa6 20. f4 fxg5 21. fxe5+ Ke8 {[#] Hoping for ...Rc8.} 22. Qb3 $1 {And now e6 would win.} Nd8 $1 ({Wrong is} 22... Qxe2 $2 23. Rfe1 $18 (23. e6 Qe3+ 24. Qxe3 dxe3 $18)) (22... Nxe5 $2 23. Qd5 $18) 23. Nd6+ Bxd6 24. exd6 Rc8 $1 25. Qd5 $1 {[%cal Rd5e5] Strongly threatening Qe5+.} Qxa3 26. e3 $1 {[%cal Re3d4]} Ne6 ({Don't take} 26... dxe3 27. Qxg5 Qxd6 28. Qxg7 $17) 27. exd4 Qe3+ {[%mdl 64] [#] Double Attack} 28. Kh1 Qxd4 {White must now prevent ...Rf8.} 29. Rfe1 $1 {[%cal Re1e6]} Qxd5 30. Bxd5 Kd8 {aiming for ...Nd4.} 31. Bxe6 Re8 32. Bxd7 $1 Rxe1+ 33. Rxe1 {Threatening mate with Ba4.} Kxd7 $11 {[%mdl 4096] Endgame KR-KR} 34. Re7+ Kxd6 35. Rxa7 Rc7 36. Ra5 h6 37. Kg2 g4 38. Ra2 Ke6 39. h3 gxh3+ 40. Kxh3 Rc5 41. Ra4 Kf6 42. Rf4+ Rf5 {...Rxf4 is the strong threat.} 43. Ra4 Rf1 44. Kg4 Kg6 45. Ra5 Rf6 46. Rb5 Re6 47. Ra5 Re4+ 48. Kf3 Rb4 49. Rc5 h5 50. Rc6+ Kg5 51. Rc5+ Kh6 52. Rc6+ g6 53. Rc5 Rb3+ 54. Kf2 Rd3 55. Ra5 Kg7 56. Rb5 Ra3 57. Rc5 Ra6 58. Rb5 Kf6 59. Kf3 Kg7 60. Kf2 Rf6+ 61. Kg2 Rf5 62. Rb4 Ra5 63. Kf3 Kf6 64. Kf2 g5 65. Kf3 Kf5 66. Kf2 Ra3 67. Rc4 Ra2+ 68. Kf3 Ra5 69. Rb4 Rd5 70. Ra4 Rd3+ 71. Kf2 $1 Ke5 72. Rb4 Rd5 73. Ra4 Rb5 74. Kf3 g4+ 75. Kf2 Rb2+ 76. Ke3 Rb3+ 77. Kf2 Rf3+ 78. Kg2 Rd3 79. Ra8 Rd2+ 80. Kg1 Ke4 81. Rf8 Rd5 82. Kg2 Kd3 83. Re8 Kd4 84. Re7 Re5 85. Rd7+ Ke3 86. Ra7 Rd5 87. Re7+ Kd4 88. Re8 Ra5 89. Rd8+ Ke5 (89... Kc3 {feels hotter.} 90. Re8 Ra2+ 91. Kh1 Kd3 92. Rd8+ Ke2) 90. Re8+ Kf6 91. Rf8+ Kg7 92. Rf2 Kg6 93. Rb2 Kf6 94. Rf2+ Ke5 95. Re2+ Kd4 96. Re8 Ra2+ 97. Kg1 Rd2 98. Re7 Kd3 99. Re5 Re2 100. Rf5 Ke3 {Black is slightly better.} 101. Rf8 Rd2 102. Rf7 Ke2 103. Rf2+ Ke3 {Accuracy: White = 75%, Black = 82%.} (103... Kd3 $5 {[%cal Rd2f2]} 104. Rf5 Ke4 $15) 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.29"]
[Round "9.6"]
[White "Shankland, Samuel"]
[Black "Gareyev, Timur"]
[Result "1-0"]
[ECO "E11"]
[WhiteElo "2731"]
[BlackElo "2557"]
[Annotator "TA"]
[PlyCount "155"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,155,9,12,7,33,31,87,89,100,92,91,99,108,89,122,119,125,118,139,78,95,77,89,70,88,74,60,72,125,126,125,122,129,118,116,113,116,116,136,115,149,116,125,126,167,153,142,146,145,154,144,144,154,144,144,148,152,101,170,169,168,168,169,164,148,151,130,148,141,147,158,156,148,107,152,115,114,114,114,114,119,124,122,114,116,113,118,112,105,106,164,156,226,209,212,216,223,221,193,198,252,250,246,244,206,126,118,110,179,160,186,152,150,110,128,121,243,234,375,375,354,352,321,261,543,536,536,536,536,536,536,529,529,529,529,529,522,514,514,514,507,507,500,489,467,412,405,397]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 a5 5. e3 O-O 6. Bd3 {E11: Bogo-Indian} d6 (6... b6 7. O-O Bb7 8. Qe2 d6 9. Bc1 d5 10. cxd5 exd5 11. Ne5 Re8 12. a3 Bd6 13. f4 Ne4 14. Nc3 f6 15. Bxe4 dxe4 16. Qc4+ {1-0 (16) Gunina,V (2522)-Cramling,P (2518) Beijing 2014}) 7. O-O Re8 (7... Nc6 $14) 8. Bc1 $16 {Strongly threatening a3.White is better.} e5 9. a3 Bc5 $146 ({Predecessor:} 9... Bxa3 10. bxa3 e4 11. Bc2 exf3 12. Qxf3 Nbd7 13. Nc3 {1-0 (51) Schmidt,D (1907)-Dorr,J (1645) GER email 2010}) 10. dxc5 e4 11. cxd6 exd3 12. dxc7 Qxc7 13. Qxd3 Na6 14. b3 (14. Nc3 $142) 14... Nc5 15. Qc2 a4 16. Nbd2 axb3 17. Nxb3 Nxb3 18. Qxb3 Ra5 (18... Ne4 $142) 19. Bb2 Ne4 20. Rfd1 Be6 21. Rd4 Nc5 22. Qc2 {Hoping for Ng5.} Na4 23. Rc1 f6 24. h3 Bf5 25. Qb3 Nc5 26. Qd1 Be4 27. Nd2 Bc6 28. Bc3 Raa8 29. Bb4 Ne6 30. Rd6 Ng5 31. Qg4 Qf7 32. Rd1 h5 33. Qg3 ({White should try} 33. Qf5) 33... Qg6 (33... Ne4 $16 34. Nxe4 Rxe4) 34. h4 $18 Qc2 35. Re1 ({Don't take} 35. hxg5 $6 Qxd1+ 36. Kh2 Qg4 $14) 35... Ne6 36. e4 Rad8 37. Qb3 Qxb3 38. Nxb3 Rxd6 39. Bxd6 Rd8 40. Bb4 Ba4 41. Nd2 Kf7 42. Nf1 Rd4 43. c5 Nf4 44. f3 Nd3 45. Rb1 $1 Bc2 46. Ra1 Ba4 47. Ne3 Nxb4 48. axb4 Rxb4 $16 {[%mdl 4096] Endgame KRB-KRN} 49. Nf5 Bc6 (49... Kg8 $16 {was necessary.} 50. Kh2 g6) 50. Ra8 $18 g6 (50... Rb1+ $16 51. Kf2 g6) 51. Nd6+ Ke6 52. Rg8 $1 b6 53. Rxg6 bxc5 54. Nf5 Bxe4 (54... Be8 $142 55. Rg8 Kd7 56. Rg7+ Kc6 57. Ne7+ Kd6) 55. fxe4 Rxe4 {KRN-KR} 56. Ng3 Rxh4 57. Ne2 Rb4 58. Kf2 Kf5 (58... h4 $16 59. Rg8 Ke5 60. Re8+ Kd6) 59. Rg3 $1 Rc4 60. Rf3+ Kg5 61. Ng1 Rc2+ 62. Kg3 $1 h4+ (62... f5 $16 63. Rf1 Kf6) 63. Kh2 Rc4 (63... c4 {was worth a try.} 64. Nh3+ Kg6) 64. Nh3+ Kg6 65. Nf4+ Kf5 66. Nd5+ Kg5 $2 (66... Ke5) 67. Nxf6 Rd4 {If Black can now play ...c4 this consolidates a bit.} 68. Nh7+ Kh6 {[#]} 69. Nf8 $1 {[%cal Rf8e6]} Rd6 70. Rf7 Rc6 {If only Black now had time for ...c4....} 71. Nd7 c4 72. Ne5 Rc5 {[#]} 73. Ng4+ $1 Kg6 74. Rf2 c3 {intending ...c2.} 75. Ne3 Rg5 76. Rc2 Rc5 77. Nd1 Kg5 78. Rxc3 {Accuracy: White = 80%, Black = 43%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.30"]
[Round "10.1"]
[White "Nakamura, Hikaru"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2746"]
[BlackElo "2739"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,57,14,7,7,0,13,0,0,0,0,0,7,0,0,0,23,5,11,9,9,6,16,6,11,0,0,0,0,0,0,-4,0,0,0,-4,0,0,0,-13]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Rc1 b6 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5} 12. Bd3 Bb7 (12... Ba6 13. Bxa6 Nxa6 14. O-O Rc8 15. Rxc8 Qxc8 16. Rc1 Qb7 17. Qc2 Nb4 18. Qc4 a5 19. a3 {½-½ (45) Navara,D (2741)-Carlsen,M (2842) Biel 2018}) 13. Qe3 Nc6 14. O-O Rc8 15. Bb1 Qe7 16. Rfd1 Na5 17. h4 $146 ({Predecessor:} 17. e5 Rxc1 18. Rxc1 Rc8 19. Rxc8+ Bxc8 {½-½ (42) Gaitan,J (2181)-Filion,C (2230) Banfield 2011}) 17... Rxc1 18. Rxc1 Rc8 {The position is equal.} 19. Rxc8+ Bxc8 20. Qf4 h6 21. Bd3 Qd8 22. h5 Nc6 23. Qc1 Bb7 24. Qc3 Qd6 25. a3 Ne7 26. Ne5 Nc6 27. Nf3 Ne7 28. Ne5 Nc6 29. Nf3 {Accuracy: White = 63%, Black = 66%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.30"]
[Round "10.2"]
[White "Caruana, Fabiano"]
[Black "Lenderman, Aleksandr"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2828"]
[BlackElo "2637"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,93,32,33,33,38,17,23,32,27,27,32,22,50,58,50,27,46,38,52,28,28,27,27,20,12,20,20,17,17,20,16,14,29,22,36,28,34,34,38,25,61,50,69,68,104,97,109,110,127,119,166,172,237,232,230,216,264,200,277,277,277,277,334,348,362,348,471,454,534,535,537,541,627,617,604,602,902,908,2300,2264,2304,1885]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nf6 6. d4 Be7 7. Bd3 O-O 8. O-O {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves} Nc6 9. d5 (9. Re1 Nb4 10. Bc4 d5 11. Bb3 c6 12. Ne2 Ne4 13. c3 Na6 14. Ng3 Nd6 15. Bc2 Nc7 {½-½ (33) Giri,A (2780)-Yu,Y (2764) Shenzhen 2018}) 9... Nb4 10. Be2 {White has an edge.} c6 11. dxc6 bxc6 12. a3 Nbd5 $146 ({Predecessor:} 12... Na6 13. Bd3 Nc5 14. Re1 Nxd3 15. Qxd3 {1-0 (46) Cook,P-D'Emilia,J LSS email 2006}) 13. Nxd5 Nxd5 14. Nd4 Bd7 15. Bf3 Rc8 16. Bxd5 cxd5 17. Be3 Bf6 18. Qd2 Qc7 19. h3 Rfe8 20. Rfe1 h6 21. c3 Qb7 22. Nf3 Re6 23. Bd4 {And now Rxe6 would win.} Be7 24. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} a6 25. a4 Re8 26. Kh2 Re4 27. Reb1 $40 {[%mdl 128] White has some attack.} Bd8 {[#]} 28. b5 $1 {[%mdl 512]} a5 (28... axb5 29. axb5) 29. Rb2 Qa8 30. Qd3 Qb7 {[#]} 31. Nd2 $1 Rf4 32. Nb3 Bf5 (32... Qa8 $142 33. Qg3 Bg5) 33. Qg3 $18 {[%csl Gd4][%cal Rg3g7]} g5 {[#]} 34. b6 $1 {[%mdl 512]} Qa6 (34... Bxb6 35. Nxa5) 35. Nd2 {aiming for Be3.} Bd7 36. Rab1 {Threatens to win with b7.} Qb7 {[#]} 37. Nb3 $1 Qa6 ({Much worse is} 37... Bxb6 38. Nd2 $18) 38. Nc1 {Hoping for b7.} Qb7 39. Nd3 Rxd4 40. cxd4 {White is clearly winning.} Re6 41. Nf4 Re4 42. Ne2 Bxa4 43. Nc3 Rxd4 {Black hopes to continue with ...Bc6.} 44. Qxd6 Be7 45. Qe5 Re4 46. Nxe4 dxe4 47. Rc1 {Accuracy: White = 85%, Black = 30%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.30"]
[Round "10.3"]
[White "Sevian, Samuel"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2642"]
[BlackElo "2762"]
[Annotator "TA"]
[PlyCount "108"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,108,0,0,0,18,0,22,0,8,7,8,0,0,0,25,19,25,29,44,39,89,90,79,63,61,58,52,60,47,54,58,54,54,52,50,52,41,41,45,47,53,54,53,56,65,63,61,61,60,49,83,83,84,84,96,91,91,91,91,91,116,127,124,124,124,108,131,106,106,106,120,116,131,124,131,77,248,248,303,303,303,35,37,44,44,44,151,80,133,0,0,0,174]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb6 9. Nc3 O-O 10. Be3 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3} Bg4 11. h3 Bh5 12. Qc2 Bg6 {Strongly threatening ...Nxc3.} 13. Qb3 Ne7 14. O-O c6 15. Bd3 Nf5 (15... Nd2 16. Nxd2 Bxd3 17. Rfd1 Bg6 {0-1 (58) Aronian,L (2767)-Nakamura,H (2777) chess.com INT 2018}) 16. Rfe1 {[#]} Ba5 $146 ({Predecessor:} 16... Nxe3 17. Rxe3 Ng5 18. Bxg6 fxg6 {½-½ (46) Firouzja,A (2582)-Sunilduth Lyna,N (2573) Manavgat 2018}) 17. Rad1 Bxc3 18. bxc3 c5 {Threatens to win with ...c4.} 19. Bxe4 dxe4 20. Nd2 Bh5 21. Rc1 cxd4 22. cxd4 Nxd4 23. Bxd4 ({Much weaker is} 23. Qxb7 Ne2+ 24. Rxe2 Bxe2 $15) 23... Qxd4 24. Nxe4 Rae8 25. Ng3 Rxe5 26. Rxe5 Qxe5 27. Qxb7 a5 28. Qc7 Qxc7 $1 29. Rxc7 $14 {[%mdl 4096] Endgame KRB-KRN} Bd1 30. Ra7 a4 31. Nf5 Rd8 32. Ne3 h6 33. Kf1 Rd4 34. f3 Rd3 35. Kf2 Bc2 {[%mdl 64] Decoy} 36. Nxc2 $16 {KRN-KR} Rd2+ 37. Kg3 Rxc2 38. Rxa4 {KR-KR} g5 39. h4 Kg7 40. h5 Rd2 41. Kh3 Rf2 42. Ra8 Rc2 43. a4 Rc4 44. g3 Rb4 45. a5 Ra4 46. a6 (46. Ra7 $142) 46... Kf6 $2 {[#]} (46... Ra2 $16 {keeps fighting.}) 47. Kg2 $1 $18 Ra3 48. Kf2 Kf5 49. Ke2 $2 (49. a7 $18) 49... g4 50. fxg4+ Kxg4 51. a7 {And now Rg8+ would win.} Kf5 {[#]} ({Better is} 51... Ra2+ $14 52. Ke3 Kh3) 52. g4+ $1 {[%mdl 512]} Kf6 $16 {[#]} (52... Kxg4 53. Rg8+) 53. g5+ $1 {[%mdl 512]} Kg7 $1 $11 (53... Kxg5 54. Rg8+) 54. gxh6+ $2 (54. g6 $11 fxg6 55. hxg6) 54... Kh7 {Accuracy: White = 68%, Black = 55%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.30"]
[Round "10.4"]
[White "Liang, Awonder"]
[Black "Xiong, Jeffery"]
[Result "1/2-1/2"]
[ECO "B10"]
[WhiteElo "2590"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,69,28,22,26,20,36,21,48,43,33,29,41,25,79,27,70,60,66,44,30,21,26,22,47,61,193,38,31,34,46,52,47,25,20,29,10,23,181,61,69,64,61,48,91,0,0,0,95,0,3,0]} 1. e4 c6 2. Nc3 d5 3. Nf3 g6 4. d4 Bg7 5. h3 dxe4 6. Nxe4 Nf6 7. Bd3 O-O 8. O-O Nxe4 9. Bxe4 Nd7 10. c3 c5 11. Bc2 cxd4 {B15: Caro-Kann: 3 Nc3: 3...g6 and 3...dxe4 4 Nxe4 Nf6 5 Nxf6+ exf6} 12. Nxd4 a6 (12... Qb6 13. Re1 e5 14. Nb3 Qc7 15. Be3 Nb6 16. Qe2 Nd5 17. Rad1 Nxe3 18. Qxe3 b6 19. Nd2 {1-0 (35) Sheng,J (2408)-Shabalov,A (2568) Philadelphia 2018}) 13. Bg5 Bf6 $146 ({Predecessor:} 13... Nf6 14. Re1 Qc7 15. Qf3 e5 16. Bxf6 exd4 17. Bxg7 Kxg7 18. Rac1 Qb6 19. cxd4 Qxd4 {1-0 (53) Kochetkova,J (2327)-Foisor,C (2398) Germany 2014}) 14. Bxf6 Nxf6 15. Re1 Re8 16. Re5 Qb6 (16... Qc7 $11 {keeps the balance.} 17. Qe2 e6) 17. Bb3 (17. Qf3 $16) 17... Nd7 18. Re3 Nc5 19. Qe2 e6 20. Re1 Bd7 21. Qf3 Ba4 22. Bc4 {aiming for b4.} Bd7 ({Black should play} 22... Qxb2 $14 23. Qf4 Rac8) 23. Qf6 $2 (23. b4 $18) 23... Qd8 $1 $14 {[%cal Rd8f6]} 24. Qf4 Rc8 {[%cal Ba8c8,Bc8c5,Bc5d5][%mdl 32]} 25. Nf3 {Strongly threatening Ne5.} b5 26. b4 (26. Ng5 {keeps more tension.} Qe7 27. Bb3 Rc6 28. Qh4 f6 29. Ne4) 26... bxc4 27. bxc5 Rxc5 28. Ne5 Qe7 $2 (28... Rf8 $11) 29. Ng4 ({White has to play} 29. Qd4 $1 $18 Rxe5 30. Rxe5) 29... f5 30. Ne5 $1 {[%mdl 1024] White has compensation.} Bc6 31. Rg3 $1 Qg7 {[#]} 32. Qd4 ({Better is} 32. Qe3 $1 $16 {[%cal Re3c5]} Qf8 33. Qd4) 32... Rd5 $11 33. Qf4 (33. Qe3 $11 Bb7 34. f4) 33... Rc5 $16 {[#]} 34. Qd4 (34. Qe3 $1 $16 {[%cal Re3c5]} Qf8 35. Qf4) 34... Rd5 $11 35. Qf4 {Accuracy: White = 34%, Black = 40%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.30"]
[Round "10.5"]
[White "Akobian, Varuzhan"]
[Black "Shankland, Samuel"]
[Result "1/2-1/2"]
[ECO "D48"]
[WhiteElo "2625"]
[BlackElo "2731"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,80,25,0,0,0,0,-6,0,0,0,-22,-17,-20,41,0,0,0,20,20,38,42,234,62,154,168,145,153,161,81,141,163,160,66,85,81,75,34,37,27,43,66,41,51,53,0,0,0,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. a4 {[%cal Ra4b5]} Bb7 {D48: Semi-Slav: Meran System: 7...b5 8 Bd3 a6} (9... b4 10. Ne4 c5 11. Nxf6+ Nxf6 12. b3 Bb7 13. Bb2 cxd4 14. Bxd4 Be7 15. O-O O-O 16. Ne5 Rc8 17. Bc4 a5 18. Rc1 Nd5 19. Qf3 Ba8 20. Qg3 Bh4 {1-0 (40) Mamedyarov,S (2791)-Kezin,R (2455) Sochi 2017}) 10. b3 b4 11. Ne4 c5 12. Nxf6+ gxf6 13. Bb2 $146 ({Predecessor:} 13. O-O f5 14. Bb2 Rg8 15. Qe2 cxd4 16. Ne1 dxe3 17. Qxe3 Qg5 18. Qxg5 Rxg5 {0-1 (64) Hoenlinger,B-Rellstab,L Essen 1947}) 13... cxd4 14. exd4 Qc7 (14... Rg8 $11) 15. Rc1 Qf4 {White should prevent ...Rg8.} 16. Be2 Bd6 17. g3 $36 {[%mdl 2048] White fights for an advantage.} Qh6 18. O-O Ke7 $2 {[#]} (18... O-O $14) 19. Ne1 $2 (19. d5 $1 $18 {[%mdl 512]}) 19... Rhc8 (19... Nb6 $14) 20. Bf3 $16 Bxf3 21. Qxf3 Qg5 22. Nd3 (22. Ng2 $18) 22... h5 {[#]} ({Black should play} 22... Qd5 23. Qxd5 exd5) 23. Nc5 $1 {[%cal Rc5d7]} h4 {[#]} 24. Nxd7 ({Better is} 24. Rfe1 $1 $16 {Threatens to win with Nxd7.} hxg3 25. hxg3 Bxc5 26. dxc5) 24... Kxd7 $14 25. Qb7+ Kd8 {[%cal Rh4g3]} 26. d5 hxg3 27. dxe6 {[%csl Ge6][%cal Rb7d7]} gxf2+ 28. Kh1 {[%csl Ge6][%cal Rb7d7]} fxe6 29. Rcd1 Qc5 30. Rxf2 {White threatens Rxd6+! and mate.} Qc6+ {The position is equal.} 31. Qxc6 Rxc6 32. Rxf6 {And now Rf8+ would win.} Ke7 33. Re1 Bc7 34. Rg6 Rf8 35. Rg7+ Ke8 36. Be5 Bxe5 37. Rxe5 Rf2 38. Rg2 Rf4 39. Rge2 Kd7 40. Kg2 Rd4 {Accuracy: White = 51%, Black = 43%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.30"]
[Round "10.6"]
[White "Gareyev, Timur"]
[Black "Robson, Ray"]
[Result "1-0"]
[ECO "D70"]
[WhiteElo "2557"]
[BlackElo "2667"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,53,22,18,16,22,-2,-25,-25,-25,-9,-12,38,39,39,17,14,0,27,37,45,46,53,53,112,114,165,159,149,142,418,425,29996,29996,29996,29997,29997,29998,29998,29999]} 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. Nbd2 Bf5 5. Nh4 Be4 6. Qb3 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4} Qb6 7. f3 (7. e3 e6 8. Be2 Be7 9. Nxe4 dxe4 10. g3 c5 11. Bd2 cxd4 12. exd4 Nc6 13. Bc3 O-O-O {1-0 (49) Mamedyarov,S (2808)-So,W (2778) Leuven 2018}) 7... Qxb3 8. Nxb3 Bc2 9. Bd2 {LiveBook: 5 Games} h6 {[#] Hoping for ...g5.} 10. g4 e6 11. Rc1 Bxb3 12. axb3 Be7 $146 ({Predecessor:} 12... Nbd7) 13. Ng2 Nbd7 14. e3 e5 15. dxe5 Nxe5 16. Kf2 Ned7 17. Bc3 O-O 18. Nf4 Nc5 19. h4 {Strongly threatening g5.} Ne6 {[#]} ({Black should play} 19... d4 $14 20. exd4 Nxb3) 20. g5 $1 $16 {[%cal Rg5f6][%mdl 512]} hxg5 (20... Ne8 $16) 21. hxg5 $18 Nxg5 22. Bd3 $40 {[%mdl 128] White has strong attack.} Ne6 $2 {[%mdl 8192]} (22... Rfd8 $16 {might work better.} 23. Rcg1 dxc4 24. bxc4 (24. Bxc4 Nd5 $14) 24... Ne8) 23. Bxf6 $1 gxf6 (23... Bxf6 $18 24. Bh7+ Kh8 25. Bf5+ Kg8 26. Nxe6 fxe6) 24. Bh7+ {White mates.} Kg7 25. Nxe6+ fxe6 26. Rcg1+ Kf7 27. Bg6+ {Precision: White = 86%, Black = 22%.} 1-0

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.31"]
[Round "11.1"]
[White "Xiong, Jeffery"]
[Black "Nakamura, Hikaru"]
[Result "0-1"]
[ECO "A89"]
[WhiteElo "2663"]
[BlackElo "2746"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,116,37,75,73,67,50,66,18,21,33,38,22,27,17,17,17,21,17,14,2,25,0,0,-26,-32,-20,-18,-23,-6,-15,-6,-58,-45,-47,-46,-37,-18,-22,-20,-98,-16,-17,-12,-23,-29,-21,-39,-137,-62,-258,-294,-240,-300,-422,-427,-412,-300,-296,-299,-292,-266,-292,-275,-294,-293,-293,-293,-265,-224,-309,-172,-371,-371,-427,-431,-411,-425,-425,-415,-426,-416,-629,-625,-612,-613,-600,-597,-1499,-615,-1895,-1823,-1072,-1002,-29991,-29992,-2613,-2609,-29974,-11705,-29956,-5318,-5318,-1950]} 1. d4 f5 2. Nf3 Nf6 3. c4 g6 4. g3 Bg7 5. Bg2 O-O 6. O-O d6 7. Nc3 Nc6 8. d5 Na5 9. b3 {A89: Dutch Defence: Leningrad System: 5 Nf3 0-0 6 0-0 d6 7 Nc3 Nc6} (9. Nd2 c5 10. Qc2 a6 11. b3 b5 12. Bb2 Bd7 13. e3 Rb8 14. Rab1 Qe8 15. Ne2 bxc4 16. bxc4 Ba4 17. Qd3 Bd7 18. Qa3 Nb7 19. Qxa6 {1-0 (62) Karjakin,S (2783)-Nepomniachtchi,I (2751) chess.com INT 2017}) 9... c5 10. Bb2 a6 11. Ng5 {White is slightly better.} Rb8 12. Qd3 Qe8 13. Nd1 b5 14. Qd2 Nb7 15. Ne3 Nd8 16. Nh3 $146 ({Predecessor:} 16. Rab1 h6 17. Nh3 Ne4 18. Bxe4 fxe4 19. Bxg7 Kxg7 {1-0 (33) Paluch,A-Ackley,P (1946) ICCF email 2011}) 16... Bd7 17. Rad1 b4 18. Qc2 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 19. Nf4 a4 20. h4 Ra8 21. Qb1 Ra6 22. Bf3 Qf7 23. Neg2 ({Better is} 23. Rd2 $11) 23... Ng4 24. Bxg4 fxg4 25. e4 Bxb2 26. Qxb2 Qg7 27. Qxg7+ Kxg7 28. e5 $1 Bf5 $36 {[%mdl 2048] Black is pushing.} 29. exd6 exd6 30. Rfe1 Nf7 31. Re7 (31. Ne6+ $15 Bxe6 32. dxe6) 31... Kf6 (31... axb3 $17 32. axb3 Kf6 33. Re6+ (33. Rde1 $2 Ne5 $19) 33... Bxe6 34. dxe6 Ne5 35. Nd5+ Kg7) 32. Rb7 $2 ({Wrong is} 32. Rde1 $2 Ne5 $19) ({White has to play} 32. Re6+ $1 $15 Bxe6 33. dxe6) 32... axb3 33. axb3 Rfa8 34. Ne3 (34. Kf1 {was necessary.} Ra1 35. Ne3) 34... Ra1 $19 {[#] And now ...Rxd1+ would win.} 35. Kf1 Ne5 36. Rxa1 Rxa1+ 37. Ke2 Nf3 {[%csl Gf3][%cal Ra1e1]} 38. Nxf5 Kxf5 {[%mdl 4096] Endgame KRN-KRN} 39. Ke3 {White wants to mate with Rf7+.} Re1+ 40. Kd3 Ne5+ 41. Kd2 Ra1 42. Ne6 h6 (42... Ra3 $142 43. Rb8 Nf3+ 44. Kc2 Ra2+ 45. Kd3 Rb2 46. Rf8+ Ke5) 43. Rb6 $2 (43. Re7) 43... Ra3 44. Kc2 Ra2+ 45. Kd1 Nd3 46. Rxd6 Nxf2+ 47. Ke1 Nd3+ 48. Kd1 {[#]} (48. Kf1 $142 Ke4 49. Nf4 Nxf4 50. gxf4) 48... Ke4 $1 {[%cal Re4e3] ( -> ...Ke3)} 49. Nc7 Nf2+ 50. Ke1 Kd3 51. Rxg6 Ne4 (51... Nh1 $142 52. Kf1 Nxg3+ 53. Kg1 Ne2+ 54. Kf1 Ke3) 52. Kf1 Nxg3+ 53. Kg1 Ne2+ 54. Kh1 Ke3 55. Rf6 Ra1+ 56. Kg2 Rg1+ 57. Kh2 g3+ 58. Kh3 Rh1+ {Accuracy: White = 44%, Black = 79%.} (58... Nf4+ $142 59. Kg4 g2) 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.31"]
[Round "11.2"]
[White "Dominguez Perez, Leinier"]
[Black "Gareyev, Timur"]
[Result "1/2-1/2"]
[ECO "B56"]
[WhiteElo "2739"]
[BlackElo "2557"]
[Annotator "TA"]
[PlyCount "154"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,154,20,8,24,0,0,0,0,-5,-4,-4,44,37,20,27,68,60,65,41,78,81,83,31,83,74,54,40,67,60,63,66,51,57,49,42,116,98,146,32,24,33,35,24,25,24,112,108,102,24,39,8,15,8,8,8,8,3,8,4,4,8,15,14,14,15,14,0,12,12,25,0,0,8,14,0,0,0,0,0,16,16,16,16,20,23,37,37,37,37,37,37,37,0,37,37,45,45,0,0,45,45,45,15,15,0,45,45,45,45,45,45,45,45,45,45,234,8,8,8,8,8,8,8,8,8,8,8,8,8,8,0,8,0,8,8,8,0,0,0,8,0,8]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 d6 6. f3 e5 7. Nb3 Be6 8. Nd5 Be7 {B56: Classical Sicilian: Unusual Lines} 9. c4 O-O 10. Be3 a5 11. Qd2 a4 12. Nc1 Nd7 13. Ne2 {[#]} f5 $146 ({Predecessor:} 13... h6 14. Nxe7+ Qxe7 15. Nc3 Nc5 {1-0 (33) Ivanchuk,V (2739)-Dziuba,M (2573) Warsaw 2009}) 14. exf5 Bxf5 15. Nec3 Nc5 16. Be2 Bh4+ 17. g3 Bf6 18. Rd1 (18. O-O $16) 18... Ne6 (18... Bh3 $14) 19. O-O $16 Ncd4 20. Bd3 Bh3 21. Rf2 Bg5 22. Bf1 Bxf1 23. Rdxf1 Bxe3 24. Qxe3 Rc8 (24... Qe8 $14) 25. f4 $1 Rxc4 {[#]} 26. fxe5 ({White must play} 26. f5 $1 $16 {[%cal Rf5e6]} Ng5 27. Kg2) 26... Rxf2 $1 $14 27. Rxf2 Rc5 28. Kg2 h6 29. h4 Nc6 {[#]} (29... dxe5 $11 30. Qxe5 a3) 30. exd6 $1 $16 Qxd6 31. Rd2 ({Reject} 31. Qf3 Kh8 $11) ({Better is} 31. Qe4 $16 Ncd4 32. a3) 31... Ncd4 $1 $11 32. Rxd4 (32. Qe4 {keeps more tension.} a3 33. bxa3 Kh8 34. a4 Qc6 35. Nb4) 32... Nxd4 33. Qxd4 {Black must now prevent Nf6+!} a3 $1 34. Nf6+ Qxf6 35. Qxc5 axb2 36. Qd5+ Kh8 $132 {[%mdl 2048] Black is not holding back} 37. Nb1 Qg6 38. Qd1 Qe4+ 39. Kf2 Qf5+ 40. Kg2 Qe4+ 41. Kh2 Qf5 42. h5 Qf2+ 43. Kh3 Qf5+ 44. g4 Qe4 45. Kg3 b5 46. a3 b4 47. axb4 Qxb4 48. Qd8+ Kh7 {Hoping for ...Qe1+.} 49. Qd3+ Kh8 50. Qf5 Qd4 51. Kf3 Kg8 52. Ke2 Kh8 53. Kf3 ({Don't play} 53. Qc8+ Kh7 $16) 53... Kg8 54. Qe6+ Kh8 55. Ke2 Kh7 56. Qf5+ Kh8 57. Nd2 Qc3 58. Qf8+ Kh7 59. Qf5+ Kh8 60. Qe4 Kg8 61. Qd5+ Kh8 62. Qd8+ Kh7 63. Qd3+ Qxd3+ 64. Kxd3 $14 {[%mdl 4096] Endgame KN-K3P} g6 $2 (64... Kh8 $14 65. Kc2 g6 66. hxg6 Kg7) 65. Kc2 $2 ({White should play} 65. Ke4 $18) 65... Kg7 {The position is equal.} 66. Ne4 ({Not} 66. Kxb2 gxh5 67. gxh5 Kf6 $18) 66... gxh5 67. gxh5 Kf7 68. Kxb2 $11 {Threatens to win with Kc3. KN-KP} Ke6 69. Kc3 Kf5 70. Kd4 Kg4 71. Nf6+ Kf5 $1 72. Ne4 {And now Kd5 would win.} Kg4 73. Nf6+ Kf5 $1 74. Ne8 {Strongly threatening Kd5.} Kg5 75. Ng7 {White threatens Ke5 and mate.} Kf6 $1 76. Ne8+ Kg5 77. Ng7 {Threatening mate with Ke5.} Kf6 $1 {Accuracy: White = 46%, Black = 64%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.31"]
[Round "11.3"]
[White "Shankland, Samuel"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "E11"]
[WhiteElo "2731"]
[BlackElo "2828"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,77,29,30,27,34,4,9,11,19,13,30,20,36,13,15,0,0,0,0,0,0,0,0,0,0,0,5,-12,0,0,0,-4,0,-3,-6,-14,0,0,4,0,9,9,9,7,33,19,8,8,8,8,8,8,10,7,8,0,8,8,10,8,14,0,20,18,42,8,8,0,25,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 Bb4+ 4. Bd2 Be7 5. Nc3 O-O 6. e4 {E11: Bogo-Indian} (6. a3 b6 7. e4 d5 8. cxd5 exd5 9. e5 Ne4 10. Bd3 Bb7 11. O-O c5 12. Re1 Nxc3 13. Bxc3 {1-0 (35) Lysyj,I (2686)-Morozevich,A (2724) Kazan 2014}) 6... d5 7. cxd5 exd5 8. e5 {The position is equal.} Ne4 9. Bd3 Nxd2 10. Qxd2 $146 ({Predecessor:} 10. Nxd2 Nc6 11. Nb3 a5 12. a4 Nb4 13. Bb1 g6 14. O-O f6 15. f4 fxe5 16. fxe5 Bg5 17. Nd2 Be3+ {0-1 (17) Tjiptadi,K (858)-Cijs,P (2156) LSS email 2008}) 10... Nc6 11. O-O Bg4 12. Qf4 Bxf3 13. Qxf3 Nxd4 14. Qxd5 Qxd5 15. Nxd5 Bd8 16. Rad1 c6 17. Nc3 Bb6 18. Rfe1 Rfe8 19. Kf1 Rad8 20. f4 Ba5 21. g3 g6 22. a3 Bxc3 23. bxc3 Nb3 24. Kf2 Nc5 25. Bc2 Kf8 26. Kf3 a5 27. Rxd8 Rxd8 28. Rd1 Rxd1 29. Bxd1 $11 {[%mdl 4096] Endgame KB-KN} h5 30. Ke3 Ke7 31. Kd4 Ne6+ 32. Ke3 Nc7 33. Be2 b5 34. Kd4 {[#] aiming for Kc5.} Ne6+ 35. Ke3 Nc5 36. Bd1 Kd7 37. Bc2 Ke7 38. Bd1 Kd7 39. Bc2 {Accuracy: White = 63%, Black = 65%.} 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.31"]
[Round "11.4"]
[White "So, Wesley"]
[Black "Liang, Awonder"]
[Result "0-1"]
[ECO "A28"]
[WhiteElo "2762"]
[BlackElo "2590"]
[Annotator "TA"]
[PlyCount "168"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,168,0,22,2,34,25,23,17,22,33,22,27,39,37,37,37,35,44,50,28,55,52,57,8,87,76,120,0,0,2,7,0,6,-93,41,12,31,31,46,13,30,0,0,-14,0,-19,0,0,-10,-466,-201,-219,-198,-197,-194,-204,-158,-133,0,-211,-204,-199,-198,-225,-232,-219,-229,-231,-218,-238,-229,-205,-203,-203,-210,-238,-202,-200,-200,-203,-202,-202,-202,-202,-208,-201,-201,-195,-175,-200,-200,-205,-200,-222,-190,-193,-191,-188,-189,-194,-197,-195,-175,-191,-190,-205,-205,-205,-205,-265,-183,-262,-190,-281,-253,-235,-191,-294,-294,-401,-392,-508,-499,-460,-363,-354,-354,-354,-340,-528,-487,-713,-702,-1155,-1209,-1665,-1406,-1288,-1203,-29956,-29958,-29957,-29959,-29960,-29961,-29947,-11954,-29966,-29969,-29969,-29967,-29971,-29972,-29971,-29972,-29971,-29973,-29970,-29972]} 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. e3 Bb4 5. Qc2 Bxc3 6. Qxc3 Qe7 7. d4 {[%cal Rf3e5] A28: English Opening: Four Knights Variation} e4 (7... Ne4 8. Qd3 exd4 9. Nxd4 Qb4+ 10. Bd2 Nxd2 11. Qxd2 Qe7 12. Nxc6 bxc6 13. Qc3 O-O 14. c5 a5 {1-0 (36) Duda,J (2738)-Svidler,P (2737) St Petersburg 2018}) 8. Ng1 $146 ({Predecessor:} 8. Nd2 d5 9. b3 O-O 10. a4 a5 11. Ba3 Nb4 12. Be2 Re8 13. h3 Bf5 14. O-O h5 {1-0 (47) Usmanov,V (2455)-Zenzera,A (2435) St Petersburg 2015}) 8... d5 9. b3 {White has an edge.} O-O 10. Ne2 a5 11. Nf4 Be6 12. Be2 g5 13. Nxe6 fxe6 14. a3 Qd7 15. O-O Ne7 16. b4 a4 17. b5 Rf7 (17... dxc4 $11 18. Qxc4 g4) 18. c5 $16 Qe8 19. f4 ({White should try} 19. Rb1 $16) 19... exf3 20. Rxf3 g4 21. Rf4 Ng6 {[%cal Be7g6,Bg6h4,Bh4f3][%mdl 32]} 22. Qc2 (22. Rf1 $11 {remains equal.}) 22... e5 (22... Nxf4 $17 23. exf4 g3 $1 {[%mdl 512]} 24. hxg3 Rg7) 23. Rf5 e4 24. Bd2 {Threatens to win with Raf1.} Nh4 $1 {[%cal Rh4f5]} 25. Re5 Qf8 $1 {[%cal Rf8h6] Strongly threatening ...Qh6.} 26. Be1 Nf3+ 27. Bxf3 gxf3 28. Bg3 Ng4 $36 {[%mdl 2048] And now ...f2+ would win. Black has some pressure.} 29. Rg5+ Rg7 30. Rxd5 $2 {[%mdl 8192]} (30. Rxg7+ $11 {and White stays safe.} Qxg7 31. gxf3 Nxe3 32. Qc3) 30... Qf7 (30... Nxe3 $142 31. Qxe4 Re8) 31. Qa2 $19 {[#]} f2+ $1 {[%mdl 512]} 32. Bxf2 Nxf2 33. Re5 Nh3+ 34. Kh1 {[#]} Nf2+ (34... Qxa2 $1 $17 35. Rxa2 Rf8) 35. Kg1 {[#]} Qxa2 $1 36. Rxa2 Nd1 37. g3 Rf7 38. Rxe4 Nc3 39. Rg4+ Kf8 40. Rd2 Nxb5 41. Rd3 c6 42. e4 Re8 43. d5 Nc7 44. Rd4 Re5 {[%cal Rc6d5]} 45. Rxa4 cxd5 46. exd5 Nxd5 47. Rge4 Rxe4 48. Rxe4 {[%mdl 4096] Endgame KRN-KR} Rc7 49. Rh4 Nf6 50. Kg2 Rxc5 51. Rb4 Rc7 52. g4 Nd5 53. Rb5 Nc3 54. Rb6 Kf7 55. Kg3 Nd5 56. Rd6 Ne3 57. Rh6 Kg7 58. Rb6 Nc4 59. Rb3 Kf6 60. Kf4 Ke6 61. h3 (61. Kg5 $142) 61... Nd6 62. Re3+ (62. Kg5 {was necessary.}) 62... Kf7 63. Rd3 Rc6 64. Rb3 (64. Kg5 $142) 64... Ra6 65. Kg5 Ra5+ 66. Kh4 b5 67. Rd3 Nc4 68. Rd7+ Kg6 69. Rb7 Nxa3 70. Rb6+ (70. Kg3 $142) 70... Kf7 71. Rb7+ (71. Rb8 $142 Nc4 72. Kh5) 71... Ke6 72. g5 Nc4 73. Rxh7 Nd6 74. Rh6+ Ke5 {( -> ...Nf5+)} 75. Rh8 b4 76. Rf8 Rb5 77. g6 Rb7 78. Rf3 Rb8 79. Rb3 Kf6 {Black mates.} 80. Kh5 Kg7 81. Kg5 Ne4+ 82. Kf5 Nd2 83. Rd3 Rb5+ 84. Kf4 b3 {Accuracy: White = 45%, Black = 62%.} 0-1

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.31"]
[Round "11.5"]
[White "Lenderman, Aleksandr"]
[Black "Sevian, Samuel"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "2637"]
[BlackElo "2642"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,51,26,26,26,35,28,32,32,49,49,66,13,10,20,15,0,0,0,0,0,0,0,0,-2,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. Nf3 d5 6. a3 Bxc3+ 7. Qxc3 dxc4 8. Qxc4 b6 9. Bg5 {E36: Nimzo-Indian: Classical: 4...d5 5 a3} Ba6 10. Qa4 c5 11. dxc5 bxc5 12. Rc1 Qb6 13. Bxf6 gxf6 {LiveBook: 26 Games} 14. Rc2 {[#]} Rd8 $146 ({Predecessor:} 14... Nc6 15. e3 Bxf1 16. Rxf1 {½-½ (35) Ivanchuk,V (2731)-Duda,J (2534) Tromsoe 2013}) 15. e3 Bxf1 ({Wrong is} 15... Qd6 $2 16. Rd2 $18) 16. Rxf1 Nc6 17. Ke2 Na5 {[#] Hoping for ...Qa6+.} 18. Nd2 ({Better is} 18. b4 $1 $14 Qa6+ 19. b5) 18... Rd5 $11 {The position is equal.} 19. Rfc1 f5 20. g4 Rad8 21. gxf5 exf5 22. h3 Kf8 23. Ke1 Kg8 24. Ke2 Kf8 25. Ke1 Kg8 26. Ke2 1/2-1/2

[Event "US-ch Open 2019"]
[Site "Saint Louis"]
[Date "2019.03.31"]
[Round "11.6"]
[White "Robson, Ray"]
[Black "Akobian, Varuzhan"]
[Result "0-1"]
[ECO "D36"]
[WhiteElo "2667"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2019.03.20"]
[EventType "swiss"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,112,6,19,0,19,34,39,20,21,0,0,0,11,0,41,0,-1,-10,35,2,21,19,20,18,28,35,27,30,29,17,18,16,16,0,16,0,79,81,80,76,86,74,74,77,123,120,114,112,140,71,87,71,77,0,0,0,0,-10,0,-416,-413,-413,-407,-406,-331,-538,-503,-510,-504,-300,-162,-940,-957,-1989,-1748,-29976,-29977,-29977,-29978,-29982,-29983,-29982,-5716,-1235,0,-29982,-29974,-29976,-994,-29992,-29993]} 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 c6 6. Qc2 Be7 7. e3 Nbd7 8. Bd3 Nh5 9. Bxe7 Qxe7 10. Nge2 g6 11. O-O O-O 12. Rae1 Ndf6 13. Nc1 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2)} Bd7 (13... Ng7 14. f3 c5 15. dxc5 Qxc5 16. Nb3 Qb6 17. Nd4 Ne6 18. Qf2 Bd7 19. Nxe6 Bxe6 20. b3 Bd7 {½-½ (43) Wojtaszek,R (2735)-Wang,Y (2718) Tromsoe 2014}) 14. f3 Rfe8 $146 ({Predecessor:} 14... Rae8 15. Qf2 Bc8 16. Nb3 Qd8 17. Rd1 Kh8 18. Rfe1 Ng8 19. Bf1 Qg5 20. e4 Nf4 {½-½ (86) Debashis,D (2548)-Lubbe,N (2447) Douglas 2018}) 15. Nb3 {White is slightly better.} b6 16. e4 {aiming for e5.} Nf4 17. Qd2 Nxd3 18. Qxd3 Rad8 19. Qe3 (19. exd5 $5 {[%cal Re1e7]} Qd6 20. dxc6 Bxc6 21. Rxe8+ Rxe8 22. Rd1 $14) 19... Be6 20. e5 Nd7 21. Ne2 c5 22. Ng3 c4 23. Nd2 f6 24. f4 f5 25. Nf3 b5 26. h3 b4 27. Ne2 a5 28. Kh2 Rf8 29. Ng5 h6 (29... Nb6 $11 {remains equal.}) 30. Nxe6 $16 Qxe6 31. g4 $1 Kh7 32. Qf3 Nb8 33. gxf5 gxf5 34. Ng3 Rg8 35. Rg1 Nd7 {[%cal Bb8d7,Bd7f8,Bf8e6,Be6f4,Bf4h3][%mdl 32]} 36. Re2 (36. Qg2 $142) 36... Rg6 37. Reg2 {Hoping for Nxf5!} Rdg8 38. b3 ({Better is} 38. Qh5 $16) 38... c3 $11 39. Qd3 Nf8 40. Qb5 (40. Nxf5 Rxg2+ 41. Rxg2 Rxg2+ 42. Kxg2 Qg6+ 43. Kf2 Ne6 $19) 40... Qf7 41. Qxa5 $2 {[%mdl 8192]} (41. Ne2 $11 {and White stays safe.}) 41... Ne6 $19 42. Qxd5 {White wants to play Qc4.} Rd8 $1 {[%cal Rd8d5]} 43. Qc4 {Threatens to win with d5.} Rxd4 {[%mdl 64] Double Attack} 44. Qc8 $2 (44. Qe2 Nxf4 45. Qf2) 44... Rg8 45. Qc6 {Nh5 is the strong threat.} Nxf4 46. Rf2 Qe6 $36 {[%mdl 2048] Black is really pushing.} (46... Rg6 $142 47. Qc8 Rd2) 47. Qc5 $2 (47. Qxe6 Nxe6 48. Nxf5 Rxg1 49. Nxd4 Nxd4 50. Kxg1) 47... Rd5 48. Qe3 {[#]} Nxh3 $1 {[%mdl 576] Double Attack} 49. Nh5 (49. Kxh3 f4+) 49... Rxg1 50. Nf6+ Kg6 51. Nxd5 Qxd5 {[%csl Gg1][%cal Rd5h1]} 52. Kxh3 {[#] KQR-KQR} Rh1+ (52... c2 $142 $1 {[%mdl 512]} 53. Rxc2 Rg4 54. Kh2 Rh4+ 55. Kg3 f4+ 56. Qxf4 Rxf4 57. Kxf4 Qd4+ 58. Kg3 Qxe5+ 59. Kf2 Qf5+ 60. Ke3 Qxc2 61. Kd4 h5 62. Kd5 h4 63. Kd6 h3 64. Ke5 h2 65. Kd6 h1=Q 66. Kd7 Qhc6+ 67. Kd8 Qd2+ 68. Ke7 Qdd6#) 53. Kg3 Rg1+ (53... Qd8 $19 54. Qf4 Qd3+ 55. Rf3 Qb1) 54. Kh3 Rg4 55. Kh2 {[#]} Qe4 (55... c2 $142 $1 {[%mdl 512]} 56. Qb6+ (56. Rxc2 Rh4+) 56... Kh7 57. Qc7+ Rg7 58. Rxc2 Rxc7 59. Rxc7+ Kg6 60. Kg1 f4 61. Rc4 Qxe5 62. Kf1 f3 63. Rc2 Qa1+ 64. Kf2 Qd4+ 65. Kg3 Qe5+ 66. Kxf3 Qf5+ {[%mdl 64] Double Attack} 67. Ke3 Qxc2 68. Kd4 h5 69. Kd5 h4 70. Kd4 h3 71. Kd5 h2 72. Kd6 h1=Q 73. a4 Qhd1+ 74. Ke7 Qxb3 75. Kf8 Qf7#) 56. Qb6+ Kh5 {Accuracy: White = 39%, Black = 63%.} 0-1

