[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 "2019.03.23"] [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 "2019.03.25"] [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 "2019.03.28"] [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 "2019.03.31"] [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