[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 "2019.03.23"] [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 "2019.03.27"] [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 "2019.03.29"] [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 "2019.03.31"] [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