[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "1.1"]
[White "Kaidanov, Gregory"]
[Black "Wolff, Patrick"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2549"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,115,0,7,6,1,0,0,0,0,0,7,-10,0,-4,8,8,17,3,11,-10,-13,-12,0,-50,-8,-58,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,14,65,55,33,0,228,207,279,276,264,283,459,462,447,441,475,491,462,479,776,775,777,777,740,714,12814,12814,5489,12688,12835,12835,12836,12837,12837,12837,12838,12837,12835,12832,12840,12835,12841,12841,12842,12843,12843,12843,12843,12844,12844,12845,12845,12845,12846,12846,12847,12847,12847,12848]} 1. Nf3 {Krasenkow,M} Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d6 6. d4 b5 7. O-O Bb7 8. Nbd2 Nbd7 9. c4 {A49: 1 d4 Nf6 2 Nf3 g6 3 g3: Anti-King's Indian systems.} bxc4 10. Nxc4 c5 11. Rc1 {The position is equal.} a5 12. dxc5 Nxc5 {[#]} 13. Nd4 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 13. Bd4 Ncd7 14. a4 Ra6 15. Na3 Qa8 16. Nb5 Rc6 17. Rxc6 Bxc6 18. Ne1 Bxg2 19. Nxg2 {0-1 (58) Meier,G (2628)-Carlsen,M (2845) Karlsruhe/Baden Baden 2019 CBM 190 [Krasenkow,M]}) 13... Bxg2 14. Kxg2 Qd7 15. f3 Rfb8 16. Qd2 Nd5 17. e4 Nb4 18. Bc3 Qb7 19. Rcd1 Qa6 (19... a4 $5 {[%cal Ra4b3]} 20. Bxb4 Bxd4 $15) 20. h4 h5 (20... a4 $15 21. Bxb4 Bxd4 22. Bxc5 (22. Qxd4 Rxb4 23. Qc3 Rab8 $17) 22... dxc5) 21. Nf5 $11 gxf5 22. Bxg7 Kxg7 23. Qg5+ {[%mdl 64] [#] Double Attack} Kf8 24. Qh6+ Kg8 25. Qg5+ $40 {[%mdl 192] Double Attack. White mounts an attack.} Kf8 {aiming for ...d5!} 26. Qh6+ Kg8 {[#]} 27. Nxd6 $1 {[%mdl 512]} exd6 28. Rxd6 Qxd6 29. Qxd6 Ne6 $1 30. exf5 Rd8 31. Qe5 (31. Qb6 $5 {[%cal Rf5e6]} Nd5 32. Qf2 $16) 31... Nf8 $2 {Black is now going downhill.} (31... Rd5 $11 32. Qe4 Ng7) 32. Qe3 {Threatens to win with Qg5+.} f6 33. Qh6 {[%mdl 64] Double Attack} Nd5 34. Re1 Re8 $2 (34... Ra7 {was necessary.} 35. Kh3 (35. Qxh5 Nf4+ 36. gxf4 Rh7 $16) 35... Rh7) 35. Rxe8 {White is clearly winning.} Rxe8 36. Qxh5 Re2+ 37. Kf1 Re5 38. Kf2 Ne3 (38... Ne7 $142 39. Qg4+ Kh8) 39. f4 $18 Re7 40. Qf3 Nd7 41. g4 Nc5 42. Qxe3 Rxe3 43. Kxe3 {[%mdl 4096] Endgame KN-KP} Na6 44. Kd4 Nb4 45. a4 Nc2+ 46. Kc5 Kf7 47. h5 Ne3 48. g5 Nxf5 49. Kb5 Nd4+ 50. Kxa5 f5 51. Kb6 Ne6 52. a5 Nxf4 53. a6 Nd5+ 54. Kb7 f4 55. a7 f3 56. a8=Q f2 57. Qa6 {White threatens h6 and mate.} Ke7 58. Qe2+ {Av CentiPawn Loss W=149/B=111. Weighted=53/36} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "1.2"]
[White "Gurevich, Dmitry"]
[Black "Goldin, Alexander"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2399"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,74,8,5,7,4,9,11,8,4,7,7,15,12,4,8,2,7,7,26,31,29,20,48,41,51,44,89,94,91,93,95,99,129,63,151,66,75,75,92,59,59,59,59,59,59,47,47,44,44,44,44,0,44,0,44,37,44,0,44,0,44,0,44]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 O-O 6. e3 b6 7. cxd5 Nxd5 8. Nxd5 {D37: Queen's Gambit Declined: 5 Bf4.} Qxd5 9. a3 {Recently 9.Be2 got a lot of attention.} c5 10. dxc5 Qxc5 11. Rc1 Qa5+ 12. Qd2 Qxd2+ 13. Nxd2 Na6 {[#]} 14. Bb5 $146 {[%mdl 2048] Black must now prevent Bc6. White is more active.} ({Predecessor:} 14. Be2 Bb7 15. O-O Rfd8 16. Nc4 f6 17. b4 Rac8 18. f3 e5 19. Bg3 Nc7 20. Rfd1 {½-½ (30) Korobov,A (2688)-Kryvoruchko,Y (2682) Linares 2020}) 14... Bb7 15. Ke2 Rac8 16. b4 Nb8 17. f3 a6 18. Bd3 Nd7 19. Nc4 Rfd8 20. Nd6 Bxd6 21. Bxd6 b5 22. Bc7 Re8 {[#]} 23. e4 (23. a4 $1 $16 {[%mdl 512]}) 23... f6 {[#]} (23... Nb8 $14) 24. Rc2 ({Better is} 24. a4 $1 $16 {[%mdl 512]}) 24... Ne5 25. Bxe5 $1 fxe5 26. Rhc1 Rxc2+ 27. Rxc2 Rc8 28. Rxc8+ Bxc8 $14 {[%mdl 4096] Endgame KB-KB} 29. Ke3 g5 30. g3 Kf7 31. Bc2 Bd7 32. Bd3 Kf6 33. Bc2 h6 34. Bd3 Bc6 35. Bc2 Bd7 36. Bd3 Bc6 37. Bc2 Bd7 {Av CentiPawn Loss W=-10/B=-15. Weighted=-14/-18} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "1.3"]
[White "Benjamin, Joel"]
[Black "Shabalov, Alexander"]
[Result "1-0"]
[ECO "A04"]
[WhiteElo "2506"]
[BlackElo "2528"]
[Annotator "TA"]
[PlyCount "61"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,61,0,0,0,30,-22,-17,-20,-24,-26,-16,-21,-12,-6,0,-20,0,0,0,-8,0,0,0,0,0,0,18,16,12,0,15,0,7,0,18,1,101,104,104,106,105,99,207,58,208,151,306,64]} 1. Nf3 c5 2. g3 g6 3. Bg2 Bg7 4. O-O Nc6 5. d3 e6 6. e4 Nge7 7. c3 d5 8. Qe2 O-O 9. Re1 {A08: King's Indian Attack.} b5 {[#]} 10. Be3 $146 (10. exd5 $142 exd5 11. Nbd2) ({Predecessor:} 10. e5 b4 11. Bg5 h6 12. Be3 bxc3 13. bxc3 d4 14. cxd4 cxd4 15. Bd2 Ba6 16. Na3 {½-½ (35) Bauer,C (2607)-Sokolov,A (2563) Metz 2010}) 10... d4 $11 11. cxd4 {The position is equal.} cxd4 12. Bd2 a5 13. Na3 Ba6 14. Rec1 Qb6 15. Qe1 Rfc8 16. Rc2 Rc7 17. Rac1 Rac8 18. Bf4 Rd7 19. Bd2 Rdc7 20. h4 h6 21. Bf4 $36 {[%mdl 2048] White is pushing.} Rd7 22. Bd2 Rcc7 23. Bf4 Rc8 (23... e5 $5 24. Bd2 $8 Nc8 $11) 24. Bd2 Bf8 25. Nh2 Rdd8 (25... h5 $11) 26. Ng4 $16 h5 27. Nf6+ Kg7 28. e5 Bb7 (28... Nb4 $16) 29. Kh2 ({Better is} 29. Bg5 $18) 29... Qa6 (29... Nb4 $14) 30. Qe4 Nf5 $2 {[#]} (30... Ba8 $16 {keeps fighting.}) 31. Qf4 $2 {Av CentiPawn Loss W=-25/B=-29. Weighted=-37/-36} (31. Rxc6 $18 Rxc6 32. Rxc6 Bxc6 33. Qxc6 Qxc6 34. Bxc6) 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "1.4"]
[White "Yermolinsky, Alex"]
[Black "Getz, Shelby"]
[Result "1/2-1/2"]
[ECO "D07"]
[WhiteElo "2486"]
[BlackElo "2298"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,70,21,48,0,11,0,27,-7,6,-6,46,0,17,18,17,22,15,4,0,0,0,0,0,0,0,-7,0,-35,-19,-16,-30,-80,-59,-57,-62,-94,-77,-94,-57,-105,-100,-104,-97,-102,-103,-98,-105,-87,-49,-48,-7,-39,-39,-42,-21,-21,-21,-27,0,-24,0,-38,0]} 1. d4 d5 2. c4 Nc6 3. Nc3 e5 4. cxd5 Nxd4 5. g3 Nf6 {[#] White must now prevent ...Bf5.} 6. Bg2 {D07: Queen's Gambit: Chigorin Defence.} (6. e3 $5 {[%cal Re3d4]} Nf5 7. Nf3 $11) 6... Bf5 7. e4 {[#]} Bg4 $146 ({Predecessor:} 7... Bg6 8. Nge2 Bc5 9. O-O O-O 10. Bg5 h6 11. Be3 Nxe2+ 12. Qxe2 Bxe3 13. Qxe3 c6 14. dxc6 bxc6 {½-½ (70) Boron,A (1906)-Torgersen,T (2050) ICC INT 2009}) 8. Qd3 {White has an edge.} (8. f3 $5 {[%cal Rf3g4]} Bd7 9. Nge2 $11) 8... c6 $132 {[%mdl 2048] aiming for ...cxd5. Black is fighting back} 9. h3 Bd7 (9... Bh5 $11) 10. Nf3 (10. f4 {seems wilder.} Bd6 11. Be3 c5 12. Nf3 Nxf3+ 13. Bxf3 a6 14. O-O-O) 10... Nxf3+ 11. Qxf3 Bc5 12. O-O O-O 13. Bg5 h6 14. Bxf6 Qxf6 15. Qxf6 gxf6 16. Rac1 Bd4 17. Ne2 Bb6 18. g4 h5 19. Ng3 hxg4 20. hxg4 Bxg4 21. dxc6 bxc6 22. Rxc6 Kg7 23. b4 Rac8 24. b5 Rcd8 25. Rc2 Rd3 26. Nf5+ Bxf5 27. exf5 Rfd8 28. Re1 R8d4 29. Be4 Rd2 {[#] Hoping for ...Rxe4!} 30. Re2 Rd1+ 31. Kg2 Rb4 32. Rb2 Rc4 33. Rbc2 Rb4 34. Rb2 Rc4 35. Rbc2 Rb4 {Av CentiPawn Loss W=-12/B=-10. Weighted=-13/-11} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "1.5"]
[White "Novikov, Igor"]
[Black "Christiansen, Larry"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2554"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,67,29,28,26,32,20,33,14,43,43,46,12,32,17,17,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 a6 5. cxd5 exd5 6. Bg5 Be6 7. e3 Nbd7 8. Bd3 Be7 9. O-O O-O 10. Rc1 {D35: Queen's Gambit Declined: Exchange Variation.} Re8 11. Qc2 h6 12. Bh4 {White is slightly better.} c5 13. dxc5 Nxc5 {[#]} 14. Be2 $146 ({Predecessor:} 14. Bf5 Rc8 15. Rfd1 Nce4 16. Bxe4 Nxe4 17. Bxe7 Qxe7 18. Nxd5 Bxd5 19. Qxc8 Rxc8 20. Rxc8+ {1-0 (42) Doettling,F (2587)-Merkel,M (2154) Baden 2019}) 14... Rc8 15. Qb1 b5 {The position is equal.} 16. a3 Nfe4 17. Bxe7 Qxe7 18. Nxe4 dxe4 19. Nd4 Nb3 20. Rxc8 Rxc8 21. Nxb3 Bxb3 22. Rc1 Rc5 23. Rxc5 Qxc5 24. Bd1 Qc4 25. Bxb3 Qxb3 $11 {[%mdl 4096] Endgame KQ-KQ} 26. Qc1 Kh7 27. h3 Qd3 28. Qc5 Qb1+ 29. Kh2 Qxb2 30. Qf5+ Kg8 31. Qc8+ {[%mdl 64] [#] Double Attack} Kh7 32. Qf5+ Kg8 33. Qc8+ {[%mdl 64] Double Attack} Kh7 34. Qf5+ {Av CentiPawn Loss W=-3/B=-2. Weighted=-4/-4} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "2.1"]
[White "Wolff, Patrick"]
[Black "Christiansen, Larry"]
[Result "1-0"]
[ECO "B06"]
[WhiteElo "2552"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "133"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,133,14,13,28,11,14,-25,0,8,7,12,15,0,18,0,7,-8,12,0,0,0,0,0,10,0,0,0,14,-46,31,31,26,0,83,60,143,143,143,143,142,100,100,100,195,157,151,154,230,197,171,151,133,77,223,129,141,124,183,206,205,131,131,138,135,38,38,45,37,37,32,23,29,32,32,32,31,33,47,26,23,23,204,167,246,97,50,37,44,0,157,165,219,210,276,258,290,293,316,295,293,291,461,241,302,228,435,399,878,4702,2420,1836,29962,29963,6117,1824,1240,1181,29979,29980]} 1. e4 g6 2. d4 Bg7 3. Nf3 d6 4. Bc4 Nf6 5. Qe2 c6 6. e5 Nd5 7. h3 O-O 8. O-O dxe5 {8...Nb6 is the modern continuation.} 9. dxe5 Be6 {B04: Alekhine's Defence: 4 Nf3.} 10. Nbd2 $5 {[%cal Bb1d2,Bd2b3,Bb3c5][%mdl 4] Exploring less charted territory.} Nd7 {[#]} 11. Nb3 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 11. Re1 a5 12. a3 b5 13. Ba2 Qb6 14. c4 Nc7 15. Nf1 b4 16. Ng3 b3 17. Bb1 {0-1 (41) Kovalenko,I (2668)-Anton Guijarro,D (2627) Almaty 2016}) 11... N7b6 {Hoping for ...Nc3!Black has an edge.} 12. Bd3 Nb4 13. Nc5 Nxd3 14. cxd3 Qc8 15. Bg5 Re8 16. Rfe1 Nd5 17. Nxe6 Qxe6 18. Qd2 Nc7 19. Bh6 Bh8 20. Qf4 Qd5 21. Ng5 $36 {[%mdl 2048] White fights for an advantage.} Rac8 22. Re3 (22. Rac1 $11) 22... f6 ({Better is} 22... Bg7 $15 23. Bxg7 (23. e6 f6 $17) 23... Kxg7) 23. exf6 $14 Bxf6 24. Rae1 Qf5 (24... Qxa2 $11 {keeps the balance.} 25. R3e2 Qd5) 25. Qg3 Bxg5 (25... Nb5 $14) 26. Bxg5 $16 (26. Qxg5 $6 Qxg5 27. Bxg5 Nd5 $14) 26... Nd5 27. Re6 Rcd8 28. a3 Rd7 29. h4 Rf8 (29... h5 $16 {was worth a try.}) 30. R6e5 (30. Bxe7 Nxe7 31. Rxe7 Rxd3 $14) 30... Qf7 {[#]} 31. h5 $1 {[%mdl 512]} Nf4 (31... Kh8 $16) (31... gxh5 32. Bxe7+) 32. hxg6 (32. Bxe7 Nxh5 33. Qh4 Re8 $14) ({Weaker is} 32. Rxe7 Rxe7 33. Bxe7 (33. Rxe7 Qxe7 {[%mdl 64] Remove Defender} 34. Bxe7 Ne2+ {[%mdl 64] Double Attack} 35. Kh2 Nxg3 $11) 33... Nxh5 $14) 32... Nxg6 33. Bh6 Rfd8 34. R1e3 (34. R5e3 $142) 34... Qf6 (34... Qb3 $16) 35. Re6 ({White should try} 35. Bg5 $18 Qg7 36. Re6) 35... Qf5 36. Rxe7 Rxe7 (36... Qh5 $16) 37. Rxe7 $18 Qh5 38. Bd2 Qd1+ 39. Be1 Rxd3 {[#]} 40. Qb8+ (40. f3 $1 $16) 40... Rd8 $14 41. Re8+ Rxe8 42. Qxe8+ Kg7 43. Qe4 h5 44. Kh2 Qd6+ 45. g3 h4 46. Bc3+ Kh7 47. Qf5 hxg3+ 48. fxg3 {aiming for Qf7+.} c5 $2 (48... Kh6 $11) 49. Kh3 b5 (49... Kh6 $142) 50. Kg4 (50. Qf7+ $18 Kh6 51. b3 (51. Qxa7 Qe6+ 52. Kh2 Qe2+ 53. Kg1 Qe3+ 54. Kh2 Qf2+ 55. Kh3 Qf5+ 56. Kg2 Qc2+ 57. Kh1 Qd1+ 58. Kh2 Qe2+ 59. Kh3 Qf1+ 60. Kh2 Qf2+ 61. Kh3 Qf1+ 62. Kh2 Qf2+ $11)) 50... Qd1+ 51. Kg5 {[%csl Gg5][%cal Rf5g6]} Qd8+ 52. Kh5 {[%csl Gh5][%cal Rf5g6]} Qe8 $2 {White stays focused until the end.} (52... Qd1+ $11 53. Kg5 Qd8+ 54. Kg4 Qd1+ 55. Qf3 (55. Kg5 Qd8+ $14) 55... Qd7+ 56. Qf5 Qd1+) 53. Kg4 $16 {Qh5+ is the strong threat.} Qe2+ {[#]} (53... b4 {is a better defense.}) 54. Kh3 $1 $18 {Qf7+ would kill now.} Qe8 55. Qxc5 Qe6+ 56. g4 Nf4+ 57. Kh4 Ng6+ 58. Kg3 a6 (58... Qf7 $142 59. Qg5 a6) 59. Qf5 (59. Qa7+ $142 Qe7 60. Qxe7+ (60. Qxa6 Qe3+ 61. Kh2 Qf2+ 62. Kh1 Qh4+ 63. Kg2 Qxg4+ 64. Kf2 Qf4+ 65. Kg2 Qg4+ 66. Kf1 Qf3+ 67. Ke1 Qh1+ 68. Kd2 Qd5+ 69. Ke1 Qh1+ 70. Kf2 Qh2+ 71. Ke3 Qf4+ 72. Ke2 Qe4+ 73. Kf2 Qf4+ 74. Kg2 Qg5+ 75. Kf1 Qf5+ 76. Ke1 Qe4+ 77. Kf2 Qf4+ $11) 60... Nxe7 61. Kf4) 59... Qd6+ 60. Kf2 Qh2+ $2 (60... Kg8 61. Qe4 Kf7) 61. Ke3 Qg3+ $2 (61... Qg1+ 62. Ke4 Qb1+ 63. Kd5 Qxf5+ 64. gxf5 Nh4) 62. Ke4 {White threatens Qh5+ and mate.} Qg2+ 63. Kd4 Qg1+ 64. Kd5 Qg2+ 65. Kc5 {White wants to mate with Qh5+.} Qg1+ 66. Kb4 {Intending Qf7+ and mate.} a5+ 67. Kxb5 {Av CentiPawn Loss W=15/B=388. Weighted=-16/197} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "2.2"]
[White "Getz, Shelby"]
[Black "Novikov, Igor"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2298"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,53,-21,0,0,-12,-5,0,-47,-57,-60,-66,-141,-141,-151,-156,-221,-226,-225,-154,-260,-260,-251,-163,-413,-162,-225,-189,-171,-170,-277,-281,-247,-192,-187,-187,-177,-158,-235,-175,-212,-190,-318,-312,-424,-414,-29999]} 1. a3 Nf6 2. d4 g6 3. Nc3 d5 4. Bg5 Bg7 5. Qd2 h6 6. Bf4 {[#] A00: Irregular Openings.} c5 $146 ({Predecessor:} 6... c6 7. f3 Nh5 8. Be5 Bxe5 9. dxe5 e6 10. O-O-O Qg5 11. g4 Qxd2+ 12. Rxd2 Ng7 {½-½ (43) Zagrapan,P (2060)-Harasta,V (2220) Slovakia 1994}) 7. e3 O-O 8. dxc5 {The position is equal.} Nbd7 {[%cal Bb8d7,Bd7c5,Bc5e4][%mdl 32]} 9. O-O-O ({Don't go for} 9. Nxd5 $2 Nxd5 10. Qxd5 Bxb2 $19) 9... Nxc5 {White must now prevent ...Nce4.} 10. Nf3 (10. f3 $15) 10... Nce4 $17 11. Nxe4 Nxe4 12. Qxd5 (12. Qe1 $17) 12... Qb6 $19 {[%csl Gg7][%cal Rb6b2]} 13. Rd4 Bxd4 14. exd4 (14. Nxd4 $17 Nxf2 15. Rg1) 14... Nxf2 15. Rg1 Be6 16. Qe5 $2 (16. Qc5 {was necessary.}) 16... Ng4 $2 (16... Rfc8 17. Qe2 Bf5 18. Qxf2 Rxc2+ 19. Qxc2 Bxc2 20. Kxc2 Rc8+ 21. Kb1 g5) 17. Qe1 (17. Qb5 $142) 17... g5 18. Bd2 {[#]} Bf5 $1 19. Qxe7 {[#]} (19. Bc3 $142) 19... Rac8 $1 {( -> ...Qb3)} 20. Bc3 Rfe8 $40 {[%mdl 128] Black has strong attack.} 21. Qb4 Qxb4 22. axb4 a6 23. d5 (23. Kd2 $17) 23... Be4 24. d6 {aiming for d7.} Red8 25. h3 (25. Nd2 {was called for.} Bg6 26. Nc4) 25... Ne3 26. b5 Rxd6 {[%csl Ge3][%cal Rd6d1]} 27. bxa6 (27. Nd2 $19) 27... Rd1# {White got outplayed after the opening. Av CentiPawn Loss W=-96/B=-71. Weighted=-120/-41} 0-1

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "2.3"]
[White "Shabalov, Alexander"]
[Black "Yermolinsky, Alex"]
[Result "1-0"]
[ECO "C22"]
[WhiteElo "2528"]
[BlackElo "2486"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,57,18,15,0,31,33,35,-36,-41,-41,-39,-58,33,-68,42,37,44,-14,29,41,56,62,39,47,138,109,112,109,110,111,146,85,84,80,96,96,88,41,60,37,53,0,104,97,118,94,174,139,172,180]} 1. e4 e5 2. d4 exd4 3. Qxd4 Nc6 4. Qc4 g6 5. Nc3 Bg7 {[#]} 6. Nf3 $146 {C22: Centre Game.} ({Predecessor:} 6. Be3 Nge7 7. O-O-O d6 8. h4 Be6 9. Qd3 h5 10. Nge2 Ne5 11. Qb5+ Qd7 12. Nd4 Qxb5 13. Bxb5+ {½-½ (33) Ponkratov,P (2631)-Chigaev,M (2588) Lichess.org INT 2020}) 6... Nge7 7. Bg5 {And now Nd5 would win.} h6 8. Bh4 (8. Be3 $14) 8... d6 9. O-O-O O-O 10. Nd5 Be6 (10... g5 $15 11. Bg3 Be6) 11. Qa4 (11. Bxe7 $1 $14 Nxe7 12. Qxc7 {[%mdl 64] Double Attack} Nxd5 13. Qxd8 Rfxd8 14. exd5) 11... Bxd5 (11... g5 $15 12. Bg3 a6) 12. exd5 $14 Ne5 13. Nd4 (13. Nxe5 $14 dxe5 14. Qb4) 13... g5 14. Bg3 c5 15. dxc6 bxc6 16. h4 c5 ({Black should play} 16... g4 $14) 17. Bxe5 $16 Bxe5 18. Nf3 Bg7 19. hxg5 Qb6 20. Qb3 (20. b3 $142) 20... hxg5 21. Nxg5 {Bc4 is the strong threat.} d5 {With the idea ...Qf6.} 22. Qxb6 axb6 23. Kb1 c4 $1 24. c3 b5 25. g3 (25. Be2 $14) 25... d4 (25... b4 $11 26. cxb4 Rfb8) 26. cxd4 Rad8 27. Nf3 Nd5 (27... Rd5 $16) 28. Bg2 Nb4 29. Ne5 {Av CentiPawn Loss W=-21/B=-31. Weighted=-29/-34} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "2.4"]
[White "Goldin, Alexander"]
[Black "Benjamin, Joel"]
[Result "0-1"]
[ECO "A05"]
[WhiteElo "2542"]
[BlackElo "2506"]
[Annotator "TA"]
[PlyCount "66"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,66,37,27,29,23,9,30,35,0,60,48,94,104,87,97,103,69,56,52,51,58,124,79,90,66,110,90,100,55,66,-6,35,41,83,38,50,44,129,118,93,-8,-15,-145,-79,-188,-76,-106,0,-125,-114,-311,-322,-680,-658]} 1. Nf3 Nf6 2. g3 g6 3. b3 Bg7 4. Bb2 O-O 5. Bg2 d5 6. c4 c6 7. O-O Bg4 8. d4 Nbd7 {D78: Fianchetto Grünfeld: 6 0-0 c6.} 9. Nc3 {is now more promising than 9.Nbd2.} dxc4 10. bxc4 Nb6 {White has an edge.} 11. Qd3 Be6 (11... Bxf3 $11 12. Bxf3 Re8) 12. Nd2 $14 {[#]} Qd7 $146 {[#]} ({Predecessor:} 12... Ng4 13. h3 Nf6 14. a4 a5 15. e4 Ne8 16. d5 cxd5 17. cxd5 f5 18. Qe2 Bf7 {½-½ (53) Marin,M (2583)-Steinberg,N (2435) Douglas 2014}) 13. a4 $1 {[%cal Ba2a4,Ba4a5][%mdl 32]} Rad8 14. a5 Nc8 15. e3 Bh3 16. Nf3 Bxg2 17. Kxg2 Qe6 ({Better is} 17... Rfe8 $14) 18. Rfd1 Nd6 19. Nd2 Qg4 20. f3 Qh5 21. Ne2 Nf5 22. Nf4 (22. e4 $14 Nxd4 23. Nxd4 (23. Bxd4 e5 $11)) 22... Qg5 {Strongly threatening ...e5!} (22... Qh6 $5 {[%cal Re7e5]} 23. Qe2 c5 $11) 23. Qe2 h5 24. Ne4 Nxe4 25. fxe4 Nd6 {[#]} (25... Nh6 $14) 26. e5 $1 $16 {[%cal Re5d6]} Ne4 27. Rf1 {[#]} (27. Qd3 $16 Nc5 28. Qc2) 27... Bxe5 $1 $11 {[%mdl 512]} 28. Nd3 ({But not} 28. dxe5 $2 Rd2 $19) (28. Qc2 $11 {keeps the balance.} Bxf4 {[%mdl 64] Pin} 29. Qxe4) 28... Bg7 (28... Bc7 $142 29. a6 b5 30. cxb5 cxb5) 29. Rab1 (29. Nf2 $17 Nxf2 30. Rxf2) 29... Nd6 (29... Qxa5 $19 30. Nf2 Nxf2 31. Rxf2 Qc7) 30. c5 Nf5 (30... Ne4 $17 31. Nf2 Qd5 32. Nxe4 Qxe4+ 33. Qf3 Qd3) 31. Nf4 (31. Bc1 $1 $11 {was the only way to keep the balance.}) 31... Rfe8 32. Bc3 $2 (32. Bc1 $17 Rd7 33. a6 bxa6 34. Qxa6) 32... e5 $19 33. Nh3 $2 (33. dxe5 Bxe5 34. Bxe5 Rxe5 {[%mdl 64] Double Attack} 35. e4) 33... Qxe3 {[%mdl 64] Double Attack. Av CentiPawn Loss W=-54/B=-25. Weighted=-62/-31} 0-1

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "2.5"]
[White "Kaidanov, Gregory"]
[Black "Gurevich, Dmitry"]
[Result "1/2-1/2"]
[ECO "A14"]
[WhiteElo "2549"]
[BlackElo "2399"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,84,19,14,6,33,13,17,20,24,25,24,24,20,21,22,25,22,0,0,0,0,0,21,18,20,25,15,0,22,18,51,0,10,14,10,13,24,2,3,1,3,4,4,0,0,0,0,0,0,0,0,0,0,0,8,0,37,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. g3 Nf6 3. Bg2 e6 4. O-O Be7 5. c4 O-O 6. b3 c5 7. cxd5 exd5 8. d4 Nc6 9. Bb2 Ne4 10. dxc5 Bxc5 11. e3 {D30: Queen's Gambit Declined: Systems without Nc3.} Bg4 12. h3 Bh5 13. Nc3 Nxc3 14. Bxc3 Rc8 {[#]} 15. Qd2 $146 ({Predecessor:} 15. g4 Bg6 16. Qd2 Be4 17. b4 Bd6 18. b5 Ne7 19. Nd4 Bb8 20. Rac1 Qd6 21. f4 Bxg2 22. Kxg2 {1-0 (71) Goldberg,G-Ravinsky,G Moscow 1955}) 15... Bxf3 16. Bxf3 d4 17. exd4 Bxd4 {[#] And now ...Ne5 would win.} 18. Bg2 Bxc3 19. Qxc3 Nd4 20. Qd3 b6 (20... Rc3 $5 {[%cal Rc3d3]} 21. Qe4 Rc7 $11) 21. Rad1 Ne6 {[%cal Bd4e6,Be6g5,Bg5f3][%mdl 32]} 22. Bd5 Qf6 23. Rfe1 Rc3 24. Qe4 Ng5 25. Qg4 (25. Qe5 $14) 25... Nf3+ (25... Rc2 {feels hotter.} 26. f4 Ne6 27. Bxe6 fxe6 28. Re2 Rfc8) 26. Bxf3 $1 Rxf3 27. Re2 g6 28. Rd7 a5 29. Qe4 Rc8 30. Kg2 Rf5 31. h4 h5 32. Red2 Qc6 33. Qxc6 (33. R2d5 {looks sharper.} Rf6 34. Qe3 Kh7 35. Qe5 Kg8 36. Qe7) 33... Rxc6 34. R7d6 Rxd6 35. Rxd6 $11 {[%mdl 4096] Endgame KR-KR} b5 36. a3 Rc5 37. Rb6 Kg7 38. Ra6 Rc3 {The position is equal.} 39. Rxa5 Rxb3 40. a4 bxa4 41. Rxa4 Rc3 42. Rf4 Rd3 {An uneventful encounter. Av CentiPawn Loss W=-5/B=-5. Weighted=-6/-5} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "3.1"]
[White "Gurevich, Dmitry"]
[Black "Wolff, Patrick"]
[Result "0-1"]
[ECO "A15"]
[WhiteElo "2399"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,68,0,15,0,5,0,0,-4,0,-7,0,-13,11,14,8,0,0,-10,0,-25,0,0,0,-1,0,0,0,-41,0,-68,0,-62,-35,-342,-344,-318,-315,-604,-566,-725,-672,-795,-669,-671,-667,-658,-657,-657,-658,-657,-658,-643,-635,-605,-608,-588,-580,-380,0,-1763,-1671]} 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 e5 5. Be2 O-O 6. O-O {A16: English Opening: 1...Nf6 with ...d5.} Nc6 7. Rb1 a5 8. a3 {The position is equal.} d6 {[#]} 9. d3 $146 ({Predecessor:} 9. d4 Nd7 10. d5 Ne7 11. b4 axb4 12. axb4 f5 13. Ng5 Nf6 14. Ne6 Bxe6 15. dxe6 fxe4 {0-1 (27) Garcia Lorenzo,J (1205)-Perez Barreto,A (2069) Tenerife 2013}) 9... Bg4 10. Be3 Nh5 11. Nd5 a4 12. Nc3 Nf4 13. Bxf4 exf4 14. Nxa4 Ra5 15. h3 Bxf3 16. Bxf3 Nd4 17. Nc3 c6 18. Kh2 Qh4 19. Rc1 ({Better is} 19. Na2 $11) 19... h5 (19... Rfa8 $15) 20. Qe1 (20. Ne2 $11) 20... g5 {...g4 is the strong threat.} 21. Ne2 $2 {[%mdl 8192]} ({White has to play} 21. Bd1 $1 $15 f3 22. g3) 21... Nxf3+ $19 22. gxf3 {[#]} g4 $3 {[%mdl 512]} 23. fxg4 $2 (23. Qxa5 $2 {too greedy.} Qxh3+ 24. Kg1 Be5 $19) (23. Ng1 Rg5 24. fxg4 hxg4 25. Kh1) 23... hxg4 24. Qxa5 {aiming for Qf5.} Qxh3+ 25. Kg1 Be5 26. f3 {And now Rf2 would win.} g3 {[%csl Gg3][%cal Rh3h2]} 27. Rf2 gxf2+ 28. Kxf2 Qh4+ 29. Kg2 {With the idea Rh1.} Kh7 {( -> ...Rg8+)} 30. Rg1 Rg8+ 31. Kf1 Qh3+ 32. Ke1 Rxg1+ 33. Nxg1 Qh1 $2 ({Black should play} 33... Qg2 $19 34. Ne2 Qxf3) 34. Qb6 $2 {[%mdl 8192]} (34. Kf1 $11) 34... c5 {Av CentiPawn Loss W=-63/B=-30. Weighted=-65/-30} 0-1

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "3.2"]
[White "Benjamin, Joel"]
[Black "Kaidanov, Gregory"]
[Result "1/2-1/2"]
[ECO "C81"]
[WhiteElo "2506"]
[BlackElo "2549"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 29,98,26,10,21,20,17,9,0,0,0,28,32,25,28,31,17,25,15,14,9,68,35,33,44,43,43,37,43,39,35,61,24,23,30,33,37,37,25,27,36,29,28,31,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Nxe4 6. d4 b5 7. Bb3 d5 8. dxe5 Be6 9. Qe2 Be7 10. Rd1 O-O 11. c4 bxc4 12. Bxc4 Bc5 13. Be3 Bxe3 14. Qxe3 Qb8 15. Bb3 Qb6 16. Qxb6 {C81: Open Ruy Lopez: Keres Variation (9 Qe2).} cxb6 17. Na3 {[%cal Bb1a3,Ba3c2,Bc2b4,Bb4c6][%mdl 32]} Rfd8 18. Nc2 Na5 19. Nb4 {[%cal Rb3d5]} Nxb3 20. axb3 a5 21. Nc6 Re8 {[#]} 22. Nfd4 $146 ({Predecessor:} 22. b4 Bd7 23. Rac1 Rac8 24. b5 Nc5 25. Nfd4 g6 26. b4 axb4 27. Nxb4 Rxe5 28. f4 {1-0 (38) Kriebel,T (2519)-Simacek,P (2481) Marianske Lazne 2019}) 22... Bd7 23. f3 Nc5 24. b4 axb4 (24... Ne6 $11) 25. Nxb4 Rxa1 26. Rxa1 Rxe5 27. Ra8+ Re8 28. Rxe8+ Bxe8 29. Nxd5 $14 {[%mdl 4096] Endgame KBN-KNN} Nd7 30. Nf5 f6 31. Nfe7+ Kf8 32. Nc8 b5 33. Nd6 Bf7 34. Nxf7 Kxf7 $11 {KN-KN} 35. Kf2 Ne5 36. b3 Nd3+ {The position is equal.} 37. Ke3 Nc5 38. b4 Na6 $1 39. Kd4 Ke6 40. g4 Kd6 41. Ke4 Nb8 42. Nc3 Nc6 43. Nxb5+ Kd7 44. Nd4 {[#] Hoping for Nxc6.} Nxb4 45. h4 Ke7 46. Nf5+ Kf7 47. Nd4 Ke7 48. Nf5+ Kf7 49. Nd4 Ke7 {Av CentiPawn Loss W=-3/B=-2. Weighted=-4/-3} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "3.3"]
[White "Yermolinsky, Alex"]
[Black "Goldin, Alexander"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2486"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,73,12,29,11,12,14,14,0,35,18,39,49,43,27,64,70,85,85,89,87,91,62,86,85,81,80,114,111,134,129,131,90,94,41,37,36,51,46,66,66,89,77,159,153,135,9,6,8,5,0,0,0,0,-2,0,-2,-2,-2,-2,-8,-8,-8,-8,-9]} 1. d4 {Atalik,S} d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 O-O 6. e3 b6 7. Qa4 {[#] D37: Queen's Gambit Declined: 5 Bf4.} Bb7 $146 ({Predecessor:} 7... dxc4 8. Qxc4 Na6 9. Rd1 Bb7 10. Be2 Qc8 11. O-O c5 12. Rc1 cxd4 13. Qxd4 Qc5 14. Nb5 Qxd4 15. Nfxd4 {1-0 (50) Atalik,S (2525)-Sahil,T (2229) Nis 2017 CBM 180 [Atalik,S]}) 8. Rd1 a6 9. cxd5 exd5 10. Ne5 c5 11. dxc5 Bxc5 12. Be2 Qe7 13. O-O Rd8 14. Bf3 Bb4 15. Qb3 {[%cal Rc3d5]} Bxc3 16. bxc3 b5 17. e4 {[%cal Re4d5]} Nbd7 18. Nxd7 Rxd7 19. exd5 Qc5 {[%cal Rb7d5]} 20. Be3 Qd6 21. Rd4 Qe5 {[%cal Rb7d5]} 22. d6 (22. Rfd1 $16) 22... Bxf3 $14 23. gxf3 Qf5 24. Bf4 Nh5 25. Bg3 $1 Qxf3 {[#]} 26. Re1 $1 {[%cal Re1e7]} Qc6 (26... Kf8 $142) 27. Re7 $16 {White wants to mate with Qxf7+.} Rf8 {[#]} 28. Qd5 (28. Be5 $1 $16) 28... Qxd5 $11 {The position is equal.} 29. Rxd5 Nf6 $132 {[%mdl 2048] Threatening ...Rxe7. Black is fighting back} 30. Rc5 Rxe7 31. dxe7 {[%mdl 4096] Endgame KRB-KRN} Re8 32. Bd6 Ne4 33. Rc6 {Strongly threatening Bb4.} Nxd6 34. Rxd6 {Hoping for Rd8!} f6 35. Rxa6 Rxe7 36. a4 bxa4 37. Rxa4 {Av CentiPawn Loss W=-11/B=-10. Weighted=-14/-11} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "3.4"]
[White "Novikov, Igor"]
[Black "Shabalov, Alexander"]
[Result "1-0"]
[ECO "E70"]
[WhiteElo "2554"]
[BlackElo "2528"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,51,30,20,29,29,37,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-12,56,41,41,6,37,29,499,482,634,628,666,660,655,651,702,697,678,682,702,700]} 1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nge2 a6 6. f3 O-O 7. Be3 Nbd7 {E81: King's Indian: Sämisch: 6th move deviations (including 6 Be3 c6).} 8. Qd2 b5 9. cxb5 axb5 {The position is equal.} 10. Nxb5 c6 11. Nbc3 e5 12. Rd1 $5 {[%mdl 4] An interesting side line.} d5 13. exd5 Nxd5 14. Nxd5 cxd5 15. Nc3 $36 {[%mdl 2048] White is more active.} Re8 {[#] Strongly threatening ...exd4.} 16. Kf2 {[#]} exd4 $146 (16... e4 $1 $11) ({Predecessor:} 16... e4 17. Be2 Qh4+ 18. Kg1 Qd8 19. Kf2 Qh4+ 20. Kg1 Qd8 21. Bg5 Nf6 22. Kf2 h6 23. Bxh6 Bxh6 24. Qxh6 {½-½ (68) Walczak,P (2489)-Sandstroem,L (2436) ICCF email 2016}) 17. Bxd4 $14 Ne5 $1 18. Bb5 Bd7 19. Bxd7 Nc4 $2 {[%mdl 8192] Loses the game.} (19... Qxd7 $11 20. b3 Qf5) 20. Qf4 $18 {White is clearly winning.} g5 21. Qc1 Qxd7 22. Bxg7 Kxg7 23. Qxg5+ {[%mdl 64] [#] Double Attack} Kf8 24. Qh6+ Kg8 {and if ...Qa7+ works, Black does fine.} 25. Nxd5 {White threatens Nf6+! and mate.} Qa7+ 26. Kg3 {Av CentiPawn Loss W=-11/B=-38. Weighted=-10/-89} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.17"]
[Round "3.5"]
[White "Christiansen, Larry"]
[Black "Getz, Shelby"]
[Result "1/2-1/2"]
[ECO "A29"]
[WhiteElo "2567"]
[BlackElo "2298"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,94,15,31,21,18,21,37,31,43,35,54,4,0,-12,-7,-24,0,0,0,-11,-1,-4,-8,-7,0,-12,0,0,20,0,10,7,11,0,0,0,0,0,4,0,4,0,0,0,0,0,22,20,29,0,20,0,0,0,0,0,0,0,1198,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 Nc6 2. Nc3 e5 3. Nf3 Nf6 4. g3 Bc5 5. Bg2 d6 6. O-O O-O 7. e3 a6 8. h3 {A29: English Opening: Four Knights Variation with 4 g3.} h6 9. d4 Ba7 10. b3 {White is slightly better.} Bf5 11. Bb2 Re8 12. a3 exd4 {[#]} 13. Nxd4 $146 ({Predecessor:} 13. exd4 Qd7 14. Kh2 Re7 15. Nd5 Nxd5 16. cxd5 Na5 17. Rc1 Qb5 18. Re1 Rae8 19. Rxe7 Rxe7 {0-1 (30) Brozel,S (1933)-Gaudeau,V (2080) Hampstead 2015}) 13... Nxd4 14. exd4 c6 15. d5 Qd7 16. Kh2 Ne4 17. dxc6 bxc6 18. Nxe4 Bxe4 19. Qd2 Bxg2 (19... Rab8 {is interesting.} 20. b4 c5 21. Bxe4 Rxe4 22. Rac1 Qf5) 20. Kxg2 Re6 (20... d5 {with more complications.} 21. cxd5 cxd5 22. Bd4 Rad8 23. Rae1 Re4) 21. Bd4 (21. Qc3 {is more complex.} f6 22. Rae1 Rb8 23. Qd3 a5 24. Bc1) 21... Rae8 22. Bxa7 Qxa7 23. Qd3 a5 24. b4 axb4 25. axb4 Qb6 26. Rab1 g6 27. h4 h5 28. Qf3 Re4 29. Rfc1 Qc7 30. b5 Qb6 31. Rc2 Qc5 32. bxc6 Qxc6 33. Rb5 Qc7 34. Rb4 Qc5 35. Rb7 R4e7 $2 {[%mdl 8192] [#]} (35... R8e7 $11) 36. Rb5 $2 ({Only move:} 36. Re2 $1 $18 {[%cal Re2e7][%mdl 512]} d5 (36... Rxe2 37. Qxf7+) 37. Qf6 Qxf2+ 38. Rxf2 Rxb7 39. Qc6) 36... Qc7 $11 {The position is equal.} 37. Rd5 Re5 38. Rc1 Rxd5 39. Qxd5 {[%mdl 4096] Endgame KQR-KQR} Re5 40. Qa8+ Kg7 41. Qa1 {Hoping for f4.} Kh7 42. Qd4 Qc6+ 43. Kg1 Rc5 44. Qf6 Rf5 45. Qd4 Rc5 46. Qf6 Rf5 47. Qd4 Rc5 {Av CentiPawn Loss W=-30/B=-29. Weighted=-56/-31} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "4.1"]
[White "Wolff, Patrick"]
[Black "Getz, Shelby"]
[Result "0-1"]
[ECO "B01"]
[WhiteElo "2552"]
[BlackElo "2298"]
[Annotator "TA"]
[PlyCount "24"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,24,64,54,30,45,27,22,34,26,-10,3,-157,-148,-664,-659]} 1. e4 d5 2. exd5 Qxd5 3. Nc3 Qd6 4. d4 Nf6 5. Nf3 a6 6. g3 Bg4 7. Bg2 {B01: Scandinavian Defence.} Nc6 8. Bf4 Qb4 9. O-O {Hoping for a3.} O-O-O {[%cal Rc6d4]} 10. d5 {[#] Strongly threatening a3.} e6 11. dxc6 $2 (11. a3 $11 Qxb2 12. Qe1 Nxd5 13. Nxd5 exd5 14. c4) 11... Rxd1 $17 {[#]} 12. cxb7+ $146 {[%mdl 8192]} (12. Nxd1 $17 Bxf3 13. Bxf3) ({Predecessor:} 12. Rfxd1 bxc6 13. Rab1 Bd6 14. Rd4 Qb6 15. Na4 Qa7 16. Be3 Qb8 17. Rc4 Qb5 18. Nd2 {½-½ (52) Taysayev,T (2225)-Ozgibcev,A (2368) Sochi 2018}) 12... Qxb7 {White got outplayed after the opening} 0-1

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "4.2"]
[White "Alexander Shabalov"]
[Black "Christiansen, Larry"]
[Result "1-0"]
[ECO "C41"]
[WhiteElo "2577"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,71,33,37,41,37,31,31,25,33,-18,10,5,0,0,1,10,4,10,29,0,18,16,27,12,18,27,42,52,83,95,82,87,97,26,178,146,176,191,381,367,370,347,406,405,370,347,318,285,447,408,406,344,1078,1056,1025,976,995,740,29984,29985]} 1. e4 e5 2. Nf3 d6 3. d4 exd4 4. Qxd4 Nc6 5. Bb5 Bd7 6. Bxc6 Bxc6 7. Nc3 Nf6 8. Bf4 {C62: Ruy Lopez: Steinitz Defence.} Be7 9. O-O-O O-O 10. Rhe1 {White is slightly better.} Re8 11. h3 (11. Qc4 $14) 11... Nd7 {[#]} 12. Qc4 $146 ({Predecessor:} 12. Qe3 Bf6 13. Nd4 g6 14. Kb1 Qe7 15. f3 a5 16. Ncb5 Ne5 17. Qc1 Nc4 18. Nc3 {0-1 (47) Manilyk,A (2143)-Vaintraub,A Kiev 2004}) 12... Bf6 13. Nd4 Bxd4 14. Qxd4 a5 15. f3 b5 16. Nd5 Ne5 17. Kb1 Bxd5 18. Qxd5 Rb8 19. Bc1 Nd7 20. b3 Re5 21. Qd2 b4 22. Bb2 Re6 {[#]} 23. Qd4 (23. e5 $1 $16 {[%mdl 512]}) 23... Rg6 $2 {Loses the game.} (23... Qf8 $1 $11) 24. e5 Nc5 25. f4 h5 $2 (25... Qf8 {might work better.} 26. f5 dxe5) 26. f5 Rg3 27. f6 Ne6 28. Qf2 Rg6 29. exd6 cxd6 30. fxg7 Rc8 (30... Qb6 {was worth a try.} 31. Qf3 Qb7 32. Qxh5 Nxg7 33. Qxa5 (33. Qh4 Qxg2 34. Bxg7 Rxg7 $18) 33... Qxg2) 31. Rf1 Qc7 32. Rxd6 {And now Rc6! would win.} Rxg2 $2 (32... Nxg7 33. Rf6 Qg3 34. Rxf7 Qxf2 35. R1xf2 Ra8 36. Bxg7 Rxg7) 33. Qxg2 $18 {Intending Rxe6! and mate.} Qxd6 {[#]} 34. Qf3 $1 Qc7 35. Qxh5 {[%csl Gb2,Gg7][%cal Rh5h8]} Qxc2+ {[#]} 36. Ka1 $1 {Av CentiPawn Loss W=-23/B=-88. Weighted=-15/-123} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "4.3"]
[White "Goldin, Alexander"]
[Black "Novikov, Igor"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2542"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,62,27,42,39,40,37,32,45,40,64,29,47,48,42,31,37,33,27,35,41,29,23,26,29,27,25,8,8,9,22,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. e3 c5 5. cxd5 exd5 6. Bb5+ Bd7 7. Bxd7+ Nbxd7 8. dxc5 Nxc5 9. O-O Be7 10. Nc3 {[%cal Bb1c3,Bc3e2,Be2f4][%mdl 32]} O-O 11. b3 Rc8 {is the legacy move (11...Qd7). D30: Queen's Gambit Declined: Systems without Nc3.} 12. Bb2 Qd7 $5 {[%mdl 4] An interesting side line.} 13. Ne2 Rfd8 {White is slightly better.} 14. Rc1 {[#]} a6 $146 ({Predecessor:} 14... Nce4 15. h3 Rxc1 16. Qxc1 Rc8 17. Qb1 Ne8 18. Rd1 Bf6 19. Qxe4 dxe4 20. Rxd7 exf3 {1-0 (32) Roiz,M (2658)-Feygin,M (2546) Germany 2009}) 15. h3 Nfe4 16. Nf4 Bf6 17. Bxf6 Nxf6 18. Qd4 Ne6 19. Nxe6 Qxe6 20. Ne5 Rxc1 21. Rxc1 Rc8 22. Rxc8+ Qxc8 23. Ng4 Nxg4 {The position is equal.} 24. hxg4 $11 {[%mdl 4096] Endgame KQ-KQ} Qc6 25. g3 h6 26. Kg2 f6 27. a4 a5 28. Kg1 Qc1+ 29. Kg2 Qc6 30. Kg1 Qc1+ 31. Kg2 Qc6 {Av CentiPawn Loss W=-4/B=-2. Weighted=-5/-2} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "4.4"]
[White "Kaidanov, Gregory"]
[Black "Yermolinsky, Alex"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "2549"]
[BlackElo "2486"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,112,0,35,17,27,-4,6,0,0,0,2,0,22,-41,-43,-44,-41,-41,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,-10,-35,-29,-34,-22,-56,-43,-101,-101,-101,-101,-101,-101,-101,-94,-201,-94,-94,-94,-94,-94,-94,-87,-79,-19,-19,-19,-19,0,-132,-132,-132,-114,-114,-114,-224,-147,-228,-227,-391,-158,-171,-168,-190,-198,-195,-179,-175,-171,-179,-178,-562,-153,-705,-100,-98,-17,-1026,-738,-992,-964,-29983,-29984]} 1. Nf3 c5 2. e3 Nf6 3. d4 e6 4. Bd3 d5 5. O-O Nc6 6. b3 Bd6 7. Bb2 O-O 8. Nbd2 Qe7 9. dxc5 {D05: Colle System with ...e6.} Bxc5 10. e4 Rd8 {[#]} 11. e5 $146 {The position is equal.} ({Predecessor:} 11. Qe2 Ba3 12. Bxa3 Qxa3 13. e5 Nd7 14. Rfe1 Nf8 15. c4 Nb4 16. cxd5 Nxd3 17. Qxd3 Rxd5 {1-0 (89) Vidit,S (2715)-Dobrov,V (2515) Riadh 2017}) 11... Nd7 12. a3 a5 13. Qe2 Nf8 14. c4 (14. Rfe1 $11) 14... b6 15. Rfe1 Ba6 16. g3 dxc4 17. Nxc4 Bxc4 18. Bxc4 Nd4 19. Nxd4 Bxd4 20. Rad1 Bxb2 21. Qxb2 Rxd1 22. Rxd1 Rd8 23. Rxd8 Qxd8 24. b4 Ng6 25. bxa5 bxa5 26. Be2 Qc7 27. f4 Ne7 28. Bd3 g6 29. Be4 {[#]} (29. Kg2 $1 $15) 29... Qc5+ $1 $17 30. Kg2 Qe3 31. Bf3 Kg7 32. a4 h5 33. Qf2 (33. Qc2 $17) 33... Qc3 (33... Qb3 $19 34. Qd4 Nf5) 34. Be4 Qb4 35. Qc2 Qd4 36. Kh3 Qe3 37. Kg2 h4 (37... Qe1 $17) 38. Kh3 hxg3 39. hxg3 g5 40. fxg5 (40. Kg4 $1 $11 {was the only way to keep the balance.}) 40... Qxg5 41. Qb2 Qe3 42. Qb7 Ng8 43. Bg2 (43. Bf3 $17) 43... Qxe5 {[%cal Re5h5]} 44. Qb5 (44. Bf3 $17) 44... Kf6 $19 45. Qf1+ $2 (45. Qc4 {was called for.}) 45... Ke7 (45... Qf5+ $19 46. Kh4 Ne7 47. Qxf5+ Kxf5) 46. Bf3 Nh6 47. Kg2 Nf5 {White must now prevent ...Ne3+.} 48. Qf2 Ne3+ 49. Kg1 f5 50. Kh2 Kf6 51. Qa2 $2 (51. Kh1) 51... Kg5 $2 (51... f4 $19 {has better winning chances.} 52. g4 Kg5) 52. Qb3 $2 (52. Qd2 $17) 52... Ng4+ $2 (52... f4 $19 {and Black stays clearly on top.} 53. g4 Qh8+ 54. Kg1 Qd4 55. Qb5+ e5) 53. Bxg4 $17 Kxg4 ({Black should play} 53... fxg4 $17 54. Qd1 Qb2+ 55. Kg1 Qb4) 54. Qd3 $2 {[%mdl 8192]} (54. Qd1+ $11 Kg5 55. Qd8+ Kh5 56. Qh4+ Kg6 57. Qe7) 54... Qb2+ $19 55. Kg1 e5 56. Qe3 {[#]} Qd4 $1 {Av CentiPawn Loss W=-84/B=-43. Weighted=-123/-56} 0-1

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "4.5"]
[White "Gurevich, Dmitry"]
[Black "Benjamin, Joel"]
[Result "1-0"]
[ECO "A07"]
[WhiteElo "2399"]
[BlackElo "2506"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,87,8,-5,13,12,23,25,31,0,0,6,25,9,13,11,20,29,17,17,27,15,17,22,83,15,47,-24,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,0,0,0,0,0,0,0,0,0,-58,454,454,453,451,748,718,765,751,840,698,680,506,1761,1534,1445,1328,29965,29966,29967,29969]} 1. Nf3 Nf6 2. g3 d5 3. Bg2 c6 4. O-O Bg4 5. c4 e6 6. d3 Nbd7 7. Be3 Bxf3 {A11: English Opening: 1...c6.} 8. exf3 dxc4 9. dxc4 Bc5 {[#] White has an edge.} 10. Qe2 $146 ({Predecessor:} 10. Bd2 O-O 11. Nc3 e5 12. Qc2 Re8 13. Rad1 Qe7 14. f4 Rad8 15. Rde1 Qd6 16. Bc1 {1-0 (63) Romanishin,O (2570)-Vasiukov,E (2510) Moscow 1987}) 10... O-O 11. Nc3 Qe7 12. f4 Bxe3 13. Qxe3 Qc5 14. Qxc5 Nxc5 15. b4 Nd3 16. Rab1 {[#] aiming for Rfd1.} Rad8 17. Rfd1 {And now Bf1 would win.} Rd4 (17... Rd7 $11) 18. Rd2 (18. b5 $16 c5 19. Bxb7) 18... Rfd8 19. Rbd1 (19. b5 $1 $14) 19... R4d7 20. b5 (20. Ne4 {is more complex.} Nxe4 21. Bxe4 Nc5 22. Rxd7 Rxd7 23. Rxd7 Nxd7 24. Kf1) 20... cxb5 21. cxb5 Nc5 22. Rxd7 Rxd7 23. Rxd7 Nfxd7 $11 {[%mdl 4096] Endgame KBN-KNN} 24. Kf1 Kf8 25. Ke2 Ke7 26. Ke3 Kd6 27. Kd4 Nf6 28. h3 Ne8 29. Bf3 Nc7 30. h4 h6 31. h5 f6 32. Bg2 b6 33. Bc6 a6 34. a4 ({White should try} 34. f3 $11) 34... Nxa4 $2 {[%mdl 8192] Black cannot hold the game after this.} (34... Nb3+ $1 $15 {keeps the upper hand.} 35. Kd3 Kc5) 35. Ne4+ $18 ({Worse is} 35. Nxa4 axb5 36. Bxb5 Nxb5+ 37. Kc4 Kc6 $17) 35... Ke7 36. bxa6 b5 (36... Nc5 $142 37. a7 (37. Nxc5 bxc5+ 38. Kxc5 Nxa6+ 39. Kd4 Kd6 $11) 37... Nxe4) 37. a7 Nb6 {[#]} 38. Kc5 $1 {[%mdl 512]} Na4+ 39. Kb4 Nb6 40. Nc3 Kd6 (40... Nc8 $142 41. a8=R Nxa8 42. Bxa8 Nb6) 41. Bb7 Kd7 42. Nxb5 Nca8 43. Bxa8 Nxa8 44. Kc5 {Av CentiPawn Loss W=-25/B=-84. Weighted=-27/-88} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "5"]
[White "Getz, Shelby"]
[Black "Alexander Shabalov"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2298"]
[BlackElo "2577"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,107,22,64,50,72,60,100,66,70,59,116,92,120,164,179,143,139,106,75,60,58,36,47,43,44,7,4,0,4,-37,-36,-45,-22,-43,-39,-43,-23,-25,-20,-23,-26,-24,0,-76,-72,-64,-63,-82,-6,-4,0,-24,6,-126,-120,-125,-127,-106,19,27,89,-29,132,125,156,180,173,168,171,129,334,322,527,491,614,580,557,142,229,8,8,0,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,0,0,-8,0,0,0,-8]} 1. a3 f5 2. d4 Nf6 3. Nc3 d6 4. Bg5 {[#]} Nbd7 $146 ({Predecessor:} 4... g6 5. Qd2 Nc6 6. h4 Bg7 7. O-O-O Ng4 8. e3 h6 9. Bf4 d5 10. f3 Nf6 {1-0 (32) Taranenko,E-Zaichuk,V (2017) Odessa 2010}) 5. f3 c5 6. e3 {A00: Irregular Openings.} Qa5 7. Qd2 g6 8. Bc4 {White is better.} Bg7 9. Nge2 Nf8 (9... Nb6 $14 10. Ba2 c4) 10. O-O Ne6 11. Bh4 Bd7 12. Rad1 Rc8 {Black wants to play ...cxd4.} 13. Ba2 c4 14. Bxf6 exf6 15. d5 Ng5 16. Nd4 O-O 17. f4 Nf7 18. Ne6 Rfe8 19. Nxg7 Kxg7 20. Rfe1 b5 21. Qd4 Qc7 22. e4 Qc5 23. Qxc5 dxc5 24. exf5 Nd6 25. fxg6 hxg6 26. Bb1 (26. Rc1 $11 {keeps the balance.}) 26... a5 $17 27. h3 b4 28. axb4 axb4 ({Black should play} 28... cxb4 $17 29. Ne2 a4) 29. Ne2 $11 Ra8 30. Ng3 Nb5 31. Kf2 (31. Ne4 $11) 31... c3 $1 $17 {[%cal Rc3b2]} 32. Ne4 cxb2 {...Rac8 is the strong threat.} 33. Nxc5 {[#]} Nc3 (33... Ra7 $1 $17 {Strongly threatening ...Nc3.} 34. d6 Nc3) 34. Nxd7 $11 {Hoping for d6.} Kf7 (34... Ra1 $11 {remains equal.} 35. Nb6 (35. Rxe8 Nxd1+ 36. Kf3 Rxb1 $11) 35... Re2+ 36. Rxe2 Nxd1+ 37. Kg3 Rxb1) 35. Nc5 (35. Nb6 $16 Re2+ 36. Kf1 (36. Rxe2 Nxd1+ 37. Kg1 Nc3 $16) 36... Rxe1+ 37. Rxe1) 35... Ra1 $2 (35... Nxb1 $11 36. Rxb1 Rxe1 37. Rxb2 Rae8) 36. Nd3 $16 Rxe1 37. Rxe1 Rxb1 38. Rxb1 Nxb1 39. Nxb2 {[%mdl 4096] Endgame Black must now prevent Nd3. KN-KN} Nc3 $2 (39... Na3 $16 {was worth a try.}) 40. d6 $18 Ke6 $2 (40... Nb5 41. Nd3 Ke6 42. Nxb4 Kxd6) 41. Nc4 Nb5 {[#]} 42. f5+ $1 gxf5 {intending ...Na3.} (42... Kxf5 43. d7) 43. g3 $2 (43. Ke3 $18 {is more deadly.}) 43... Nd4 {[#]} (43... Na3 $16 44. Ne3 Kxd6) 44. Ne3 $2 ({Only move:} 44. h4 $1 $18) 44... Kxd6 $11 {The position is equal.} 45. Ke1 Ke5 46. Kd2 Ke4 47. h4 b3 48. cxb3 Nxb3+ 49. Ke2 f4 50. gxf4 Nc1+ 51. Kd2 Nb3+ 52. Ke2 Nc1+ 53. Kd2 Nb3+ 54. Ke2 {Blacks defense is rewarded with a draw. Av CentiPawn Loss W=-28/B=-28. Weighted=-30/-26} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "5.1"]
[White "Benjamin, Joel"]
[Black "Wolff, Patrick"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "2506"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,95,27,-4,29,19,33,9,20,22,27,21,24,16,25,20,21,8,11,10,13,13,18,12,22,14,14,14,14,8,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,26,30,26,59,26,26,26,26,26,26,26,26,8,8,8,479,447,485,459,1074,947,29971,29972,29972,29973,29979,29979]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Nxd7 5. O-O Ngf6 6. d3 g6 7. Re1 Bg7 8. c3 O-O 9. d4 cxd4 {B50: Sicilian: 2...d6, Miscellaneous.} 10. cxd4 e5 11. dxe5 {[#]} Nxe5 $146 {The position is equal.} ({Predecessor:} 11... dxe5 12. Nc3 h6 13. Be3 Qe7 14. Qb3 b6 15. a4 Nc5 16. Qa3 Rfe8 17. Bxc5 bxc5 {0-1 (37) Ansell,S (2403)-Kovalevskaya,E (2471) West Bromwich 2004}) 12. Nxe5 dxe5 13. Nc3 (13. Qb3 {is interesting.} Qb6 14. Qxb6 axb6 15. Nc3 Rfc8 16. a3) 13... Qb6 14. Qe2 Rfc8 15. Bg5 Bf8 16. Bxf6 Qxf6 17. Nd5 Qe6 18. Rac1 Rxc1 19. Rxc1 Rc8 20. Rc4 Kg7 21. Qc2 Rxc4 22. Qxc4 Qc6 23. Qxc6 bxc6 $11 {[%mdl 4096] Endgame KB-KN} 24. Ne3 Kf6 25. Nc4 Ke6 26. Kf1 Bc5 27. Ke2 Bd4 28. f3 h5 29. b3 h4 30. h3 Bc5 31. Kd3 Bb4 32. a3 Bc5 33. b4 Be7 34. Na5 Kd6 35. Kc4 Bg5 36. Kb3 Kd7 37. Ka4 Be3 38. Nc4 Bd4 39. Ka5 Kc7 40. Ka6 f6 41. a4 {[%cal Ba3a4,Ba4b5,Bb5b6,Bb6a7][%mdl 32] b5 is the strong threat.} Bf2 42. b5 Bd4 $2 {[%mdl 8192] [#] This costs Black the game.} (42... cxb5 $1 $11 {and Black has nothing to worry.} 43. axb5 g5) 43. Na5 $1 $18 {[%cal Ra5c6]} cxb5 44. axb5 Kb8 (44... Kd6 $142 45. Nc6 Kc7 46. Nxa7 Bc5) 45. Nc6+ Ka8 {[#]} 46. Nxa7 $1 {[%mdl 576] Remove Defender. White mates.} Bxa7 47. b6 f5 48. bxa7 {Av CentiPawn Loss W=-8/B=-60. Weighted=-7/-34} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "5.2"]
[White "Yermolinsky, Alex"]
[Black "Gurevich, Dmitry"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2486"]
[BlackElo "2399"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,71,16,18,20,25,20,30,29,22,29,25,-9,62,26,39,18,58,17,10,20,29,0,34,0,0,0,6,-35,22,0,9,15,22,0,0,0,1,0,0,0,0,0,0,0,18,0,0,0,0,-3,0,-7,0,0,11,0,0,0,0,0,0,-13]} 1. d4 {Atalik,S} Nf6 2. Nf3 e6 3. c4 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 b6 7. Qa4 {[#] D37: Queen's Gambit Declined: 5 Bf4.} a6 $146 ({Predecessor:} 7... dxc4 8. Qxc4 Na6 9. Rd1 Bb7 10. Be2 Qc8 11. O-O c5 12. Rc1 cxd4 13. Qxd4 Qc5 14. Nb5 Qxd4 15. Nfxd4 {1-0 (50) Atalik,S (2525)-Sahil,T (2229) Nis 2017 CBM 180 [Atalik,S]}) 8. cxd5 exd5 9. Rd1 {White has an edge.} Bb7 10. Ne5 Nh5 11. Bg3 h6 (11... g6 $11) 12. Be2 (12. Bd3 {seems wilder.} Qd6 13. Bb1 f5 14. O-O Kh7 15. Bf4) 12... Nxg3 13. hxg3 Bd6 14. Bf3 c6 15. Nd3 Nd7 {[%cal Bb8d7,Bd7f6,Bf6e4][%mdl 32]} 16. O-O Nf6 17. b4 Qe7 18. Qb3 Ne4 19. a4 Rae8 (19... Nxg3 $15 20. fxg3 Bxg3) 20. Ne2 {The position is equal.} b5 21. Nc5 Bc8 22. axb5 axb5 23. Bxe4 dxe4 24. Nc3 Bxc5 25. bxc5 Be6 26. d5 cxd5 27. Qxb5 Rc8 28. Nxd5 Qxc5 29. Qxc5 Rxc5 30. Nf4 Bg4 31. Rd4 Re5 32. Rc1 g5 33. Nd5 {[#] And now Nf6+ would win.} Kg7 34. Rc6 Be6 35. Nc3 Bf5 36. Rd5 {Av CentiPawn Loss W=-10/B=-10. Weighted=-12/-9} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "5.3"]
[White "Novikov, Igor"]
[Black "Kaidanov, Gregory"]
[Result "1/2-1/2"]
[ECO "D43"]
[WhiteElo "2554"]
[BlackElo "2549"]
[Annotator "TA"]
[PlyCount "44"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,44,-6,0,-4,-1,-2,0,7,15,25,11,31,9,18,12,15,12,22,0,16,0,19,0,22]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. cxd5 exd5 6. Qc2 Be7 7. Bg5 g6 8. e3 Bf5 9. Bd3 Bxd3 10. Qxd3 O-O 11. Bxf6 Bxf6 12. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} a6 {D36: Queen's Gambit Declined: Exchange Variation: Main line (5 Bg5 c6 6 Qc2).} 13. O-O Nd7 14. a4 Be7 15. b5 {[#]} a5 $146 ({Predecessor:} 15... axb5 16. axb5 Bd6 17. Rfc1 Nb6 18. g3 Qd7 19. bxc6 bxc6 20. Rab1 Rfb8 21. Kg2 Kg7 {1-0 (91) Anastasian,A (2579)-Magalashvili,D (2389) Yerevan 2004}) 16. Rfc1 Bd6 17. Rc2 Nb6 {The position is equal.} 18. bxc6 bxc6 19. Rac1 Ba3 20. Ra1 Bd6 21. Rac1 Ba3 22. Ra1 Bd6 {A rather calm draw. Av CentiPawn Loss W=-3/B=-10. Weighted=-2/-10} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "5.4"]
[White "Christiansen, Larry"]
[Black "Goldin, Alexander"]
[Result "1-0"]
[ECO "D01"]
[WhiteElo "2567"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,73,0,0,0,0,0,-14,-29,-21,-29,-19,-37,-45,-54,-37,-37,-37,-27,-28,-25,-33,-44,-58,-29,-17,-20,0,0,0,0,0,0,-4,-10,0,0,7,-16,71,61,140,140,189,165,217,243,289,273,277,257,664,729,960,956,1445,762,1168,1106,1121,1036,29994,29995]} 1. d4 d5 2. Nc3 Nf6 3. Bg5 Nbd7 4. e3 g6 5. Nf3 Bg7 6. Be2 O-O 7. O-O c6 8. h3 {D01: Veresov Opening.} a5 {[#]} 9. Bd3 $146 ({Predecessor:} 9. a4 Re8 10. Bf4 Nh5 11. Bh2 f5 12. Ne5 Nhf6 13. Na2 Nxe5 14. Bxe5 Be6 15. Nc1 {1-0 (78) Frosch,E (2275)-Nickl,K (2155) Leiner 1996}) 9... b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 10. Qe2 {The position is equal.} Bb7 11. Rad1 Re8 12. e4 b4 13. Na4 dxe4 14. Bxe4 Nxe4 15. Qxe4 Qc8 {White must now prevent ...c5.} 16. Qe3 Ba6 17. Rfe1 Bb5 18. Qb3 Qa6 19. Bf4 Bc4 20. Qe3 Bb5 21. Nc5 Nxc5 22. dxc5 Bc4 23. Ne5 Bd5 24. Bh6 Bh8 25. Rd4 f6 (25... Bxe5 $11 26. Qxe5 f6) 26. Nd7 $36 {[%mdl 2048] White fights for an advantage.} Rad8 ({Black should try} 26... e5 $14) 27. Nb6 {White threatens Rxd5 and mate.} e5 {[#]} 28. Rd2 $1 Qb7 {[#]} (28... f5 $142 29. Bg5 f4) 29. Red1 $1 $18 Qf7 {[#]} 30. c4 $1 {[%mdl 512]} bxc3 (30... Bxc4 31. Rxd8) 31. bxc3 {Hoping for c4!} ({But not} 31. Qxc3 $6 g5 $16) 31... Rb8 $2 (31... Qc7 32. Nxd5 cxd5 33. Rxd5 Rxd5 34. Rxd5 Bg7 35. Bxg7 Kxg7) 32. Nxd5 cxd5 33. Rxd5 Rbc8 34. a4 Rc7 {[#]} 35. c6 $1 {[%mdl 576] Deflection} Rxc6 36. Rd7 {aiming for Qa7.} Qe6 {[#]} 37. Qa7 $1 {[%mdl 512] Av CentiPawn Loss W=-29/B=-99. Weighted=-21/-100} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "6.1"]
[White "Kaidanov, Gregory"]
[Black "Christiansen, Larry"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "2549"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "136"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,136,29,29,25,35,10,14,8,19,8,20,0,15,0,29,3,2,0,0,3,21,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-6,0,0,0,-18,0,-5,0,0,0,-4,0,-31,0,-46,0,0,0,0,0,0,0,0,0,0,0,0,8,8,29996,0,0,0,0,0,0,0,0,0,0,0,0,0,137,0,0,0,0,0,0,0,0,0,0,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 e6 2. g3 b6 3. Bg2 Bb7 4. O-O Nf6 5. c4 c5 6. Nc3 Be7 7. b3 O-O 8. Bb2 d6 9. d4 cxd4 10. Nxd4 Bxg2 11. Kxg2 Qc7 12. e4 {has lost popularity (12.e3). A30: Symmetrical English: Double Fianchetto and Hedgehog.} a6 13. f4 Nc6 14. Nxc6 Qxc6 15. Qf3 Rac8 16. Rac1 {[#]} Rfd8 $146 ({Predecessor:} 16... Qa8 17. e5 Qxf3+ 18. Rxf3 dxe5 19. fxe5 Nd7 20. Ne4 b5 21. c5 b4 22. c6 Nb6 {0-1 (41) De Wit,T (2205)-Rothuis,V (2276) Hengelo 2005}) 17. Rfe1 Bf8 18. Nd1 Nd7 19. Nf2 Qb7 20. Ng4 e5 21. fxe5 Nxe5 22. Bxe5 dxe5 23. Rcd1 b5 24. Nxe5 f6 25. Rxd8 Rxd8 26. Nd3 bxc4 27. bxc4 Rd4 28. Nf4 Rxc4 29. Re2 Rd4 30. Nd5 Qb5 31. h4 Qd3 32. Re3 Qc2+ 33. Re2 Qd3 34. Re3 $132 {[%mdl 2048] White puts up resistance} Qc2+ 35. Kh3 Rd2 {[#] aiming for ...Rh2+.} 36. Qf5 Rh2+ (36... h5 $5 37. Nxf6+ gxf6 38. Qg6+ Kh8 39. Qxh5+ Kg7 40. Qg4+ Kf7 41. Qh5+ Ke7 42. Qh7+ Kd6 $17) 37. Kg4 Qd1+ 38. Rf3 Rf2 39. h5 Rxf3 40. Qxf3 Qb1 41. h6 Qxa2 42. Qf5 Qe2+ 43. Kh3 {And now hxg7 would win.} g6 $2 {[%mdl 8192] [#]} (43... Qd1 $11) 44. Nxf6+ $2 (44. Qe6+ {mates} Kh8 45. Qxf6+ {[%mdl 64] Double Attack} Kg8 46. Ne7+ {[%mdl 64] Overworked Piece} Bxe7 47. Qg7#) 44... Kf7 45. Qf4 Ke6 {Hoping for ...Bd6.} 46. Ng4 {Threatening mate with Qf6+.} Be7 47. Qe5+ Kd7 48. Qd5+ Kc7 49. Qf7 Qxe4 50. Qxh7 Qh1+ 51. Nh2 Qe4 {The position is equal.} 52. Qf7 {Black must now prevent h7.} Qf5+ $1 53. Qxf5 gxf5 $11 {[%mdl 4096] Endgame KB-KN} 54. Nf3 a5 55. Nd4 Bf6 56. Nxf5 a4 57. Ne3 {Strongly threatening Nd5+.} a3 58. Nc2 a2 59. Kg4 Kd6 60. Kf5 Bh8 61. g4 Kc5 62. g5 {g6 is the strong threat.} Kc4 $1 63. g6 {White threatens g7 and mate.} Kb3 64. g7 Bxg7 $1 65. hxg7 Kxc2 66. g8=Q a1=Q 67. Qc8+ Qc3 68. Qxc3+ Kxc3 {Av CentiPawn Loss W=-24/B=-22. Weighted=-59/-23} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "6.2"]
[White "Gurevich, Dmitry"]
[Black "Novikov, Igor"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "2399"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "23"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,23,-8,-7,11,0,0,-5,0,-18]} 1. d4 d5 2. c4 e6 3. Nc3 c6 4. e3 Nf6 5. Nf3 Nbd7 6. Bd2 Bd6 7. Bd3 O-O 8. O-O dxc4 9. Bxc4 {The position is equal.} a6 {D46: Semi-Slav: 5 e3 Nbd7 6 Bd3, Black avoids the Meran.} 10. a4 c5 {[#]} 11. h3 $146 ({Predecessor:} 11. Qe2 cxd4 12. exd4 b6 13. Bg5 h6 14. Bh4 Bb7 15. Ne5 Be7 16. Rad1 Nxe5 17. dxe5 {0-1 (42) Korotylev,A (2600)-Gelfand,B (2736) Moscow 2007}) 11... b6 12. Qe2 {A rather calm draw.} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "6.3"]
[White "Benjamin, Joel"]
[Black "Yermolinsky, Alex"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "2506"]
[BlackElo "2486"]
[Annotator "TA"]
[PlyCount "123"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,123,28,28,29,28,28,29,34,32,32,0,-2,-47,-26,-50,-46,-49,-45,-64,-57,-56,-64,-57,-38,-66,-66,-69,0,0,0,-6,-6,-12,-15,-10,-14,-14,-10,-4,-10,-24,-22,-31,-31,-31,-31,-31,-31,-31,-31,-45,-45,-45,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,6,0,0,0,0,0,0,0,0,0,391,385,333,309,496,285,630,531,1302,1274,1091,1113,29967,29968,29968,29969,29969,29964,29965,0,29966,0,29966,29967,29966,29967,29974,29975,29975,29976,29978,29979,29979,29980]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nf6 6. Nc3 g6 {The main line 6...g6 scores better than 6...Nc6. B52: Sicilian: Moscow Variation with 3...Bd7.} 7. d4 cxd4 8. Nxd4 Bg7 {White has an edge.} 9. f3 O-O 10. Nde2 Rc8 11. b3 {[#]} b5 $146 ({Predecessor:} 11... a6 12. a4 Nc6 13. O-O Qc7 14. Rb1 Qa5 15. Bd2 Qc5+ 16. Kh1 Rd8 17. Be1 e6 18. Bh4 Rac8 19. Qd2 Rd7 20. f4 Qh5 21. Bg5 {1-0 (43) Laznicka,V (2651)-Rosko,L (2360) Czech Republic 2017}) 12. Nxb5 Nxe4 $1 13. Rb1 a6 14. Nbd4 Nf6 $1 15. Nc2 d5 16. Ne3 {[%cal Rc4d5]} Nc6 {Strongly threatening ...d4.} 17. cxd5 Nb4 {[%cal Rf6d5][%mdl 64] Double Attack} 18. Bb2 Nbxd5 (18... Rd8 $15 19. Qd4 Rab8) 19. Bxf6 $11 Nxf6 20. Qxd7 Nxd7 21. Nc4 Rab8 {Threatens to win with ...Rxc4!} 22. Kf2 Ne5 23. Nxe5 Bxe5 24. Rhc1 f5 ({Don't play} 24... Bxh2 $6 25. g3 $16) 25. h3 Kf7 26. Rxc8 Rxc8 27. Rc1 Rxc1 28. Nxc1 $15 {[%mdl 4096] Endgame KB-KN} Ke6 29. Nd3 Bd6 30. Nb2 Kd5 31. Ke3 e5 32. Na4 Bb4 33. Nb6+ Kc6 34. Nc4 Bc5+ 35. Kd3 Kd5 36. Ne3+ Ke6 37. Nc4 h5 38. a3 Ba7 39. Ne3 h4 40. Nc2 Bc5 41. Kc4 Kd6 42. b4 Ba7 43. a4 e4 44. fxe4 $1 fxe4 45. Nd4 $1 e3 $2 {[%mdl 8192] White leaves nothing to chance now.} (45... Bb6 $11) 46. Nf3 $1 $18 e2 {...Bf2 is the strong threat.} 47. Kd3 Kd5 $2 (47... Bb6 48. Kxe2 Bd8) 48. b5 (48. Kxe2 $142 g5 49. Nxg5) 48... a5 $2 (48... axb5 49. axb5 Bb6 50. Kxe2 Bd8) 49. Kxe2 Kc4 50. Ne5+ Kb3 51. Nd7 Kxa4 52. b6 Bxb6 53. Nxb6+ {KN-K3P} Kb5 54. Nd5 Kc4 55. Nb6+ Kb5 56. Nd5 Kc4 $1 {[%cal Rc4d5] [#]} 57. Nf4 $1 {[%cal Rf4g6] White mates.} Kc3 {[#]} 58. Kd1 $1 Kb2 59. Nxg6 a4 60. Ne5 Kb3 61. Kc1 a3 62. Kb1 {Av CentiPawn Loss W=-9/B=-84. Weighted=-10/-77} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "6.4"]
[White "Wolff, Patrick"]
[Black "Alexander Shabalov"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2552"]
[BlackElo "2577"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,101,44,43,0,48,-7,-12,-18,-9,-10,40,38,38,33,32,30,41,35,29,38,27,33,27,30,30,26,28,31,28,32,28,20,30,10,29,17,28,4,19,10,37,44,135,141,127,128,233,224,182,174,166,167,199,198,284,272,318,277,420,270,242,195,194,162,170,161,160,75,75,75,360,95,455,445,521,510,543,542,543,543,887,797,789,725,1269,1269,1035,797]} 1. e4 c5 2. c3 Nf6 3. e5 Nd5 4. Bc4 Nb6 5. Bb3 c4 6. Bc2 Nc6 7. Nf3 d5 8. exd6 Qxd6 9. Na3 {B22: Sicilian: 2 c3.} Qe6+ (9... Ne5 {looks sharper.} 10. O-O Bg4 11. Ba4+ Nxa4 12. Qxa4+ Bd7) 10. Qe2 (10. Kf1 $1 $14) 10... Qxe2+ $11 11. Kxe2 {The position is equal.} Be6 12. b3 {[#]} O-O-O $146 ({Predecessor:} 12... f6 13. bxc4 Nxc4 14. Bb3 N6a5 15. Nd4 Bg8 16. Ba4+ Kd8 17. Nb3 e5 18. Nxa5 Nxa5 {½-½ (45) Mahajan,A (1605)-Ruperez,M (2146) Barbera del Valles 2019}) 13. Ng5 Bd5 14. bxc4 Nxc4 15. Nxc4 {[#] Threatens to win with Ne3.} Bxc4+ 16. d3 Bd5 17. Bb3 f6 18. Nf7 Bxf7 $1 19. Bxf7 {aiming for Be6+.} e5 20. Be3 Kc7 21. h4 Ba3 22. Rab1 Rhf8 23. Bb3 Rfe8 24. g4 b6 25. Ba4 Re6 26. Kd2 Red6 27. Bb5 Na5 28. f4 Nb7 (28... Bc5 $14) 29. fxe5 $16 fxe5 30. Rhf1 Nc5 (30... Rg6 $16) 31. Rf7+ $18 Kb8 {[%cal Rc5d3]} 32. Bxc5 Bxc5 33. Rxg7 Rf6 34. Re1 ({Less strong is} 34. Rxh7 Rf2+ 35. Kd1 Rdf8 $14) 34... Rf2+ (34... Bf2 $142) 35. Re2 h6 36. Bc6 a5 (36... Rf6 $142) 37. a4 Rdf8 38. Rb7+ Kc8 39. Rh7 Rxe2+ 40. Kxe2 {[%mdl 4096] Endgame KRB-KRB} Rf2+ 41. Kd1 (41. Ke1 $142 Rf6 42. Bd7+ Kd8 43. Bf5) 41... Be3 $16 42. Be4 Ra2 $2 {[%mdl 8192] [#]} (42... Kd8 $16) 43. Re7 $2 (43. Rg7 $18) 43... Bf4 $2 {[%mdl 8192]} (43... Rd2+ $16 44. Ke1 Rb2 45. Rxe5 Bf2+ 46. Kf1 Bxh4) 44. Rg7 $18 {White is clearly winning.} Rxa4 45. g5 hxg5 46. hxg5 Ra1+ 47. Kc2 a4 48. g6 Rc1+ 49. Kb2 a3+ 50. Kxa3 Rxc3+ 51. Kb2 {Av CentiPawn Loss W=-29/B=-45. Weighted=-26/-61} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.18"]
[Round "6.5"]
[White "Goldin, Alexander"]
[Black "Getz, Shelby"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "2542"]
[BlackElo "2298"]
[Annotator "TA"]
[PlyCount "145"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,145,13,16,25,11,11,12,22,18,15,0,19,0,27,22,28,3,27,41,37,37,68,33,39,0,10,-9,0,13,12,0,27,32,26,31,45,60,63,62,72,68,243,234,241,234,236,241,408,399,382,358,372,368,350,283,283,281,276,276,257,77,212,111,109,100,103,43,52,58,580,67,70,68,77,63,193,116,558,554,502,400,318,273,276,265,241,170,169,163,174,156,124,112,105,57,178,45,61,3,8,0,8,0,8,8,8,0,153,0,7,0,175,181,196,181,188,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,29983,29984,29984,29979]} 1. c4 Nc6 2. Nc3 e5 3. Nf3 Nf6 4. g3 Bc5 5. Bg2 d6 6. O-O a6 {A29: English Opening: Four Knights Variation with 4 g3.} 7. a3 O-O 8. b4 Ba7 {The position is equal.} 9. Bb2 Re8 10. d3 h6 11. Rc1 Bg4 12. h3 Be6 13. e3 Qd7 14. Kh2 {[#]} Rad8 $146 ({Predecessor:} 14... Ne7 15. Nd2 c6 16. c5 d5 17. Ne2 Bb8 18. e4 Ng6 19. Qc2 Bc7 20. Rcd1 Rad8 {½-½ (28) Grischuk,A (2771)-Movsesian,S (2721) Moscow 2010}) 15. Qc2 Bf5 16. Nd2 Ne7 17. Nde4 Nh7 18. Nd5 Be6 19. Nxe7+ Qxe7 20. Rce1 f5 21. Nd2 c6 22. f4 Bb8 23. Nf3 exf4 24. exf4 Qf7 25. Qf2 b5 $2 (25... Nf8 $14) 26. Nd4 $18 Ba7 27. c5 dxc5 28. Nxc6 ({Stronger than} 28. Nxe6 Rxe6 29. Rxe6 (29. bxc5 Rxd3 30. Qc2 Rd8 $11) 29... Qxe6 $14) 28... Rxd3 $2 (28... Bd5) 29. Ne5 c4 30. Qe2 (30. Nxf7 Bxf2 31. Nxh6+ gxh6 $11) 30... Qf6 31. Nxd3 cxd3 32. Qd2 Qd8 33. Rf3 Bc4 {White must now prevent ...Rxe1.} 34. Rxe8+ Qxe8 35. Bf1 $2 (35. Rxd3 $18 {Strongly threatening Rd8!} Bxd3 36. Qxd3) 35... Qe4 {[#]} (35... Qc6 $16 {is a better defense.} 36. Rxd3 Bxd3 37. Bxd3 (37. Qxd3 Qb6 $14) 37... g6) 36. Rxd3 $40 {[%mdl 128] White has strong attack.} (36. Qc3 $1 $18 {[%csl Gb2][%cal Rc3g7][%mdl 512]} Nf6 37. Bxd3) 36... Bxd3 $16 37. Bxd3 Qe6 38. Be5 ({Better is} 38. Qg2 $16 {Qa8+ is the strong threat.} Bb6 39. h4) 38... Nf6 $14 39. Qg2 {And now Qa8+ would win.} Nd5 $2 {[%mdl 8192]} (39... Kf7 $14) 40. Bxf5 $2 (40. Bb1 $18) 40... Qxf5 41. Qxd5+ Kh7 42. h4 Bf2 {[#]} ({Black should play} 42... h5 $1 $14) 43. Qf3 (43. Qb7 $1 $18 {[%csl Ge5][%cal Rb7g7]} Qg4 44. Qe4+ Kh8 45. Qd3) 43... Be1 $2 {[%mdl 8192]} (43... Bb6 $16 44. g4 Qd7) 44. Qe2 $18 Qb1 45. h5 a5 46. Qg4 {[%csl Ge5][%cal Rg4g7]} Qa2+ 47. Kh3 {[%csl Ge5][%cal Rg4g7]} Qf7 48. Qe2 Qd7+ 49. g4 Bd2 {intending ...Qd5.} 50. Qe4+ Kg8 51. bxa5 Bxa5 52. Bd4 Bc7 {[#]} (52... Bd8 $14) 53. Kg3 ({Only move:} 53. f5 $1 $18) 53... Bd8 $14 54. Kf3 (54. Bc5 $14) 54... Be7 $11 55. Qe5 {[%csl Gd4][%cal Re5g7]} Bxa3 (55... Bf6 $5 56. Qb8+ $8 Kh7 57. Bxf6 Qd3+ 58. Kf2 Qd2+ 59. Kf3 Qd3+ 60. Kg2 Qd2+ 61. Kh1 Qd1+ 62. Kh2 Qd2+ 63. Kg3 Qe3+ 64. Kh4 Qf2+ 65. Kh3 Qf3+ {[%mdl 64] Double Attack} 66. Kh4 Qf2+ 67. Kh3 Qf3+ {[%mdl 64] Double Attack} 68. Kh4 Qf2+ $11) 56. g5 Qc6+ 57. Kg3 {[%csl Gd4][%cal Re5g7]} Bf8 58. g6 Qd7 $2 (58... b4 $11) 59. Kg2 $2 ({White must play} 59. Qe4 $16) 59... b4 60. f5 Qb7+ $2 (60... Qc6+ $11 {and Black is okay.} 61. Kf2 Qc2+ 62. Kg3 Qd3+ 63. Kg4 Qd1+ 64. Kh4 Be7+ 65. Kg3 (65. Qxe7 Qxd4+ 66. Kh3 Qd3+ 67. Kg4 Qd4+ 68. Kh3 Qd3+ 69. Kg4 Qd4+ 70. Kh3 $11) 65... Qd3+ 66. Kg4 Qd1+ 67. Kf4 Bg5+ 68. Ke4 Qe2+ 69. Kd5 Qb5+ 70. Bc5 Qd3+ 71. Bd4 Qb5+ 72. Bc5 Qb7+ 73. Kc4 Qa6+ 74. Kxb4 Qb7+ 75. Kc4 Qa6+ 76. Kb4 Qb7+ 77. Ka5 Bd8+ 78. Ka4 Qa6+ 79. Kb4 Qa5+ 80. Kb3 Qb5+ 81. Kc2 Qc4+ 82. Kd2 Bg5+ 83. Be3 Qb4+ 84. Kd3 Qb3+ 85. Ke2 Qc4+ 86. Kd2 Qb4+ 87. Kd3 Qb3+ 88. Ke2 Qc4+ 89. Kd2) 61. Kg3 Qe7 62. Qd5+ Kh8 63. Qf7 $2 (63. Kf3 $18) 63... Qg5+ 64. Kf2 {[%cal Rf7f8]} Qf4+ 65. Ke2 {[%cal Rf7f8]} Qe4+ 66. Be3 {[%cal Rf7f8]} Qc2+ 67. Kf3 {[%cal Rf7f8]} Qc6+ 68. Kf2 {[%cal Rf7f8]} Qd6 69. Bxh6 Qh2+ 70. Ke3 {[%cal Rf7f8]} Bc5+ 71. Kd3 {[%csl Gf7][%cal Rh6g7]} Qg3+ $2 {[%mdl 8192] [#]} (71... Qd6+ $11 72. Kc4 Qa6+ 73. Kxc5 Qa5+ 74. Kd6 Qa6+ 75. Ke7 Qa7+ 76. Kf8 Qc5+ 77. Ke8 Qc8+ 78. Ke7 Qc7+ 79. Ke6 Qc6+ 80. Ke5 Qc5+ 81. Qd5 Qe7+ 82. Qe6 Qc7+ 83. Ke4 Qb7+ 84. Ke3 Qb8) 72. Kc4 $1 {[%csl Gf7][%cal Rh6g7]} Qc3+ 73. Kb5 {Av CentiPawn Loss W=-31/B=-46. Weighted=-35/-86} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "7.1"]
[White "Yermolinsky, Alex"]
[Black "Wolff, Patrick"]
[Result "1/2-1/2"]
[ECO "A15"]
[WhiteElo "2486"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "92"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,92,55,41,50,32,19,31,18,23,31,37,31,32,21,31,29,37,37,39,28,43,31,30,29,37,39,31,35,50,-15,0,-16,-15,-35,-20,-13,-12,-16,-13,-13,-10,-12,-6,0,-7,-17,0,-12,3,9,2,3,106,104,382,382,374,-1488,384,384,384,384,384,381,318,204,204,204,491,491,491,491,491,0,280,227,280,258,280,280,350,234,234,234,234]} 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 e5 5. Nxe5 O-O 6. Nf3 {A16: English Opening: 1...Nf6 with ...d5.} Re8 $1 7. Bd3 {[#]} b5 $146 ({Predecessor:} 7... Nxe4 8. Bxe4 Bxc3 9. dxc3 Rxe4+ 10. Be3 Nc6 11. O-O d6 12. h3 Bf5 13. Nd2 Re6 {½-½ (76) Jumabayev,R (2654)-Paravyan,D (2653) Lichess.org INT 2020}) 8. O-O {White is slightly better.} bxc4 9. Bxc4 Nxe4 10. Re1 Nd6 11. Rxe8+ Qxe8 12. Bd5 Nc6 13. d4 $1 Rb8 14. Bf4 Rxb2 15. Bb3 Bb7 {Strongly threatening ...Nxd4!} 16. Qc1 {[#]} Rxb3 $1 {[%mdl 512]} 17. axb3 Nxd4 18. Nxd4 Bxd4 19. Be3 (19. Qd2 $1 $14 Nf5 20. Re1) 19... Be5 20. Rxa7 Qe6 21. h3 Qxb3 22. Ne2 Qd5 {[%csl Gb7][%cal Rd5g2]} 23. f3 Nf5 24. Bf2 $1 Bc6 25. Qe1 h5 26. Ra5 Qd6 27. Bc5 Qf6 28. Qd2 Ng3 29. Nxg3 Bxg3 30. Bd4 $36 {[%mdl 2048] Black is under pressure.} Qe6 {[#]} (30... Qe7 $11 {remains equal.}) 31. Rxh5 $1 $16 gxh5 $4 {[%mdl 8192]} (31... f6 $16 {was worth a try.} 32. Rc5 Kf7) 32. Qg5+ $18 {[%mdl 64] Double Attack} Kf8 {[%cal Re6e1]} 33. Qd8+ ({Inferior is} 33. Qxg3 d6 $11) 33... Qe8 {[#]} 34. Bg7+ $1 {[%mdl 576] Deflection} Kxg7 {[%cal Re8e1]} 35. Qxe8 h4 36. Qe3 Kg6 37. f4 f6 38. Qd3+ Kf7 $2 (38... f5 39. Qc4 Kf6) 39. Qf5 Ke7 40. Kf1 Kf7 41. Kg1 (41. Ke2 $142 Ke7 42. Qh7+ Ke6 43. Ke3) 41... Ke7 42. Qg4 Kd6 43. Qg7 Ke6 44. Qg6 Ke7 45. f5 {And now Qg7+ would win.} Bd5 46. Qg7+ Bf7 {Av CentiPawn Loss W=-16/B=-52. Weighted=-15/-28} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "7.2"]
[White "Novikov, Igor"]
[Black "Benjamin, Joel"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2554"]
[BlackElo "2506"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,73,26,22,20,31,24,28,27,34,22,3,3,4,16,29,22,20,3,8,0,0,-17,-19,-20,-6,-25,0,-16,-11,-29,-18,-33,-22,-10,0,-10,-8,-8,-8,-8,-8,-8,-8,-18,-17,-40,-21,-93,-96,-249,-137,-133,-128,-130,0,-20,-8,-8,0,0,0,-8,0,0,0,-8]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 a6 5. cxd5 exd5 6. Bg5 {D37: Queen's Gambit Declined: 5 Bf4.} Be6 7. e3 Nbd7 8. Bd3 {White has an edge.} Bd6 9. Bf4 Bxf4 10. exf4 {Threatens to win with f5.} Bg4 11. Qe2+ Kf8 $1 {[#]} 12. h3 $146 ({Predecessor:} 12. O-O c6 13. Rfe1 g6 14. h3 Bxf3 15. Qxf3 Kg7 16. g4 {½-½ (16) Rodshtein,M (2685)-Smirin,I (2594) Netanya 2019}) 12... Bxf3 $1 13. Qxf3 Qe7+ 14. Be2 Nb6 15. a3 Ne4 16. Rc1 c6 17. Nxe4 Qxe4 18. Qxe4 dxe4 19. Kd2 Rd8 20. Ke3 f5 {Strongly threatening ...Nd5+.} 21. Bc4 $1 Ke7 22. b4 Nd5+ 23. Bxd5 $1 Rxd5 $11 {[%mdl 4096] Endgame KRR-KRR} 24. Rc5 Rhd8 25. Rxd5 Rxd5 {KR-KR} 26. Rc1 a5 27. Rc4 Kd6 28. g4 {[#]} (28. f3 $1 $11) 28... g6 $1 $17 29. g5 $2 (29. a4 $17 {is a better defense.}) 29... b6 (29... axb4 $19 {Hoping for ...b3.} 30. Rxb4 Ra5) 30. Rc2 Rb5 31. Rb2 {[#]} axb4 (31... Kd5 $1 $17 {aiming for ...Kc4.} 32. h4 c5 33. dxc5 bxc5 34. Rd2+ Kc6 35. bxc5 Rxc5) 32. axb4 $11 {The position is equal.} Kd5 33. h4 Kc4 34. Rc2+ Kd5 35. Rb2 Kc4 36. Rc2+ Kd5 37. Rb2 {Av CentiPawn Loss W=-13/B=-11. Weighted=-13/-14} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "7.3"]
[White "Christiansen, Larry"]
[Black "Gurevich, Dmitry"]
[Result "1/2-1/2"]
[ECO "D01"]
[WhiteElo "2567"]
[BlackElo "2399"]
[Annotator "TA"]
[PlyCount "46"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,46,-19,-18,-12,-22,-21,-10,-26,-12,-34,-31,-35,-32,-39,-34,-36,-30,-41,-43,-43,-45,-26,0,0,0,0,0,-10,-16,-15,-6,-16,-9,-25,-4,-72,-81,-72,-7]} 1. d4 Nf6 2. Nc3 d5 3. Bg5 Nbd7 4. e3 h6 5. Bf4 a6 6. h3 {D01: Veresov Opening.} e6 7. Nf3 b5 {[#]} 8. Bd3 $146 {The position is equal.} ({Predecessor:} 8. g4 Bb7 9. Bg2 c5 10. O-O Be7 11. Ne2 Ne4 12. Ne5 cxd4 13. Nxd4 Nxe5 14. Bxe5 {0-1 (34) Fuglsang,F-Kristiansen,J (2365) Gladsaxe 1979}) 8... Bb7 9. Ne5 c5 10. a3 Be7 11. O-O O-O 12. Re1 Rc8 13. Qf3 c4 14. Be2 Nxe5 15. Bxe5 Ne4 16. Nxe4 dxe4 17. Qg4 {[%csl Ge5][%cal Rg4g7] [#]} Bg5 18. h4 f5 $36 {[%mdl 2048] Black has the initiative.} 19. Qg3 Bf6 20. c3 a5 21. h5 Bd5 22. Qg6 (22. f4 $11) 22... Bxe5 $17 23. dxe5 Qg5 {Av CentiPawn Loss W=-7/B=-7. Weighted=-10/-7} (23... Qc7 $17 24. Qg3 Rf7) 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "7.4"]
[White "Getz, Shelby"]
[Black "Kaidanov, Gregory"]
[Result "1/2-1/2"]
[ECO "A00"]
[WhiteElo "2298"]
[BlackElo "2549"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,45,-31,-16,-20,0,-27,-21,-18,0,0,0,0,33,23,31,26,27,26,27,20,33,19,62,44,60,52,46,31,42,42,40,49,45,0,33,0,40,0]} 1. a3 Nf6 2. d4 d5 3. Nc3 e6 4. Bg5 c5 5. e4 cxd4 6. Qxd4 {Threatens to win with exd5. A00: Irregular Openings.} Nc6 7. Bb5 {exd5 is the strong threat.} Be7 $1 8. exd5 {The position is equal.} exd5 9. Bxf6 Bxf6 10. Qc5 $1 {[#]} Qb6 $146 (10... Bxc3+ {feels hotter.} 11. bxc3 Qe7+ 12. Qxe7+ Kxe7 13. O-O-O Rd8) ({Predecessor:} 10... Bxc3+ 11. Qxc3 O-O 12. Ne2 Qg5 13. h4 Qe5 14. Qxe5 Nxe5 15. f3 a6 16. Bd3 Re8 {1-0 (41) Shirazi,K (2399)-Dutreuil,R (2130) Avoine 2015}) 11. Qxb6 $1 Bxc3+ $1 12. bxc3 axb6 13. Ne2 O-O 14. a4 Bd7 15. O-O-O Be6 16. Nf4 Rfd8 17. Rhe1 Rd6 18. Re3 Rad8 19. Rde1 {[%cal Rf4e6]} Bd7 20. Rd3 Be6 21. Rde3 {[%cal Rf4e6]} Bd7 22. Rd3 Be6 $1 23. Rde3 {Av CentiPawn Loss W=-7/B=-13. Weighted=-6/-12} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "7.5"]
[White "Shabalov, Alexander"]
[Black "Goldin, Alexander"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2528"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,45,4,9,8,26,20,23,33,30,20,17,18,22,0,0,0,0,0,0,0,5,0,32,27,35,-13,-12,-61,-12,-45,-44,-38,-28,-34,368,369,845,819]} 1. c4 e6 2. Nf3 d5 3. e3 Nf6 4. Nc3 {[%cal Bb1c3,Bc3b5,Bb5d4,Bd4f5][%mdl 32]} b6 5. b3 Bb7 6. Bb2 {A17: English Opening: 1...Nf6 with ...Bb4.} Bd6 7. cxd5 exd5 8. Nb5 {White has an edge.} Be7 9. Be5 Na6 {[%cal Bb8a6,Ba6b4,Bb4c6][%mdl 32]} 10. Nbd4 O-O {[#]} 11. Rc1 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 11. Nc6 Bxc6 12. Bxa6 Nd7 13. Bxg7 Kxg7 14. Nd4 Nb8 15. Nxc6 Nxc6 16. Bb7 Ne5 17. Bxa8 Qxa8 {0-1 (46) Dubov,D (2677)-Jakovenko,D (2710) Sochi 2017}) 11... c5 12. Nf5 Nb4 13. a3 Nc6 14. Bb2 d4 15. Bb5 Rc8 16. O-O {[%cal Re3d4]} Nd5 17. exd4 Bf6 18. Bxc6 Bxc6 19. Ne5 Bxe5 20. dxe5 {And now Qg4! would win.} Qg5 21. Qf3 Nb4 $2 {[%mdl 8192]} ({Don't play} 21... Qxd2 $6 {[#]} 22. Qg3 $1 $16 {[%mdl 512]}) (21... g6 $15 {stays ahead.} 22. Ng3 (22. Nd6 Nc3 $17) 22... Qxd2) 22. h4 $18 Qxd2 $2 {[#]} (22... Qxh4 23. Nxh4 Bxf3 24. axb4 (24. gxf3 Nd3 $18) 24... Be2) 23. Qg3 $1 {[%mdl 512] Av CentiPawn Loss W=-9/B=-59. Weighted=-9/-98} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "8.1"]
[White "Wolff, Patrick"]
[Black "Goldin, Alexander"]
[Result "1/2-1/2"]
[ECO "C70"]
[WhiteElo "2552"]
[BlackElo "2542"]
[Annotator "TA"]
[PlyCount "27"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,27,31,24,23,34,1,6,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nge7 5. O-O Ng6 6. c3 {C60: Ruy Lopez: Unusual Black 3rd moves and 3...g6.} d5 7. d4 {aiming for exd5.} dxe4 {The position is equal.} 8. Nxe5 Ngxe5 9. dxe5 Qxd1 $1 10. Rxd1 Bd7 {[#]} 11. Bf4 $146 ({Predecessor:} 11. Bc2 Nxe5 12. Bxe4 O-O-O 13. Bf4 Bd6 14. Nd2 Rhe8 15. Bg3 f5 16. Bc2 g5 17. f3 {1-0 (63) Sanal,V (2474)-Howell,D (2644) Doha 2016}) 11... Nxe5 12. Bxd7+ Nxd7 13. Nd2 O-O-O 14. Nxe4 {An uneventful encounter.} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "8.2"]
[White "Kaidanov, Gregory"]
[Black "Shabalov, Alexander"]
[Result "1-0"]
[ECO "A05"]
[WhiteElo "2549"]
[BlackElo "2528"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,111,5,8,-23,-8,-9,-6,-5,-3,-14,-12,-31,-31,-32,-12,-67,-66,-60,-50,-70,-66,-64,-83,-92,-91,-87,-88,-100,-108,-115,-37,-47,-20,-17,-16,-23,-21,-16,0,-20,-13,-16,0,0,0,-13,-8,-60,-58,-84,-81,-88,-92,-86,-96,-110,-50,-74,-60,-61,-54,-54,-52,-61,-36,-58,-77,-67,-58,-61,-10,-11,-8,-8,0,-18,0,-8,-8,-14,-6,-39,-14,-46,-46,-40,-43,-46,-38,-38,-41,-47,-43,-47,-49,-45,-50,-67,16,16,16,43,6203,6014]} 1. Nf3 Nf6 2. g3 b5 3. Na3 Ba6 4. c3 e6 5. Bg2 d5 {[#]} 6. d4 $146 {A05: Réti Opening: 1 Nf3 Nf6.} ({Predecessor:} 6. O-O Nbd7 7. d3 Be7 8. Nd4 Bxa3 9. Nc6 Qc8 10. bxa3 Qb7 11. Nb4 c5 12. Nxa6 Qxa6 {0-1 (50) Ganguly,S (2615)-Praggnanandhaa,R (2530) Kolkata 2018}) 6... b4 7. cxb4 Bxb4+ 8. Bd2 {The position is equal.} Bd6 9. Rc1 O-O 10. O-O Nbd7 {[%cal Bb8d7,Bd7c5,Bc5e4][%mdl 32]} 11. Ba5 Qb8 12. Rc2 ({Better is} 12. b4 $1 $11) 12... c5 $15 13. dxc5 $1 Nxc5 14. Nd4 Rc8 15. b4 Nce4 16. Rxc8+ Qxc8 (16... Bxc8 17. f3 $15) 17. Nab5 Be5 18. f4 Bxd4+ 19. Nxd4 Qc4 ({Black should try} 19... Qc3 $17 {...Qe3+ is the strong threat.} 20. Rf3 Qc4) 20. Qd3 Qxd3 21. exd3 Bxd3 22. Rc1 Nd6 23. a4 Nc4 24. Nc6 a6 $36 {[%mdl 2048] Black has the initiative.} 25. Bc7 Ne8 26. Be5 f6 27. Bd4 Ned6 28. g4 (28. Bc5 $11) 28... Kf7 29. f5 Be4 30. fxe6+ Kxe6 31. Bf1 Nd2 32. Be2 Nb3 (32... Bf3 $17 33. Be3 Bxe2 34. Nd4+ Kd7 35. Bxd2 Bxg4) 33. Rc3 $1 {[%cal Rc3b3]} Nxd4 34. Nxd4+ Ke5 35. Nc6+ Kf4 36. Nd4 Rb8 37. b5 axb5 38. axb5 Ra8 39. b6 Ra1+ (39... Ra2 $15 40. Rb3 Rd2) 40. Kf2 $11 Bh1 {[%cal Rd6e4] [#]} 41. Bd3 Be4 {Black wants to play ...Bxd3.} 42. Be2 Bg6 43. Bf3 Ra2+ 44. Ne2+ Ke5 45. Rb3 {Strongly threatening b7.} (45. Rc7 $5 {[%cal Rc7e7]} Ne4+ 46. Bxe4 Bxe4 47. Rxg7 $15) 45... Nb7 46. Ke3 Ra4 47. h4 Be4 {And now ...Na5 would win.} 48. Bxe4 Rxe4+ $15 {[%mdl 4160] [#] Endgame Double Attack. KRN-KRN} 49. Kf3 Rc4 50. Re3+ Kd6 51. Re8 Rb4 52. Rg8 g6 53. Rf8 Ke6 (53... Nc5 $15 54. Rxf6+ Ke7) 54. Nf4+ $11 Kd6 {next ...Rb3+ is good for Black.} 55. Rxf6+ Kc5 $2 {[%mdl 8192]} (55... Ke5 $14 56. Nd3+ Kxf6 57. Nxb4 Ke5) 56. Nd3+ {[%mdl 64] Double Attack. Av CentiPawn Loss W=-12/B=-28. Weighted=-12/-26} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "8.3"]
[White "Gurevich, Dmitry"]
[Black "Getz, Shelby"]
[Result "1-0"]
[ECO "D07"]
[WhiteElo "2399"]
[BlackElo "2298"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,77,74,78,99,89,92,99,96,42,54,31,56,26,32,20,29,25,65,58,52,52,116,113,97,47,46,45,52,37,61,37,49,46,48,54,50,60,65,56,135,102,136,129,127,61,88,88,76,64,71,23,31,26,68,-33,91,93,767,753,725,109,261,296,1429,1375,29956,29962,29998,29999]} 1. d4 d5 2. c4 Nc6 3. Nc3 e5 4. cxd5 Nxd4 5. e3 Nf5 6. e4 Nd4 {D07: Queen's Gambit: Chigorin Defence.} 7. Be3 Bc5 8. Nge2 {[%cal Re2d4]} Bg4 {[#] White is better.} 9. Qd2 $146 ({White should play} 9. Qd3 $16) ({Predecessor:} 9. f3 Nxf3+ 10. gxf3 Bxe3 11. fxg4 Qf6 12. Qa4+ c6 13. Nd1 Qh4+ 14. Ng3 Bf4 15. Nf2 {1-0 (22) Koziak,V (2464)-Roussel,G (1698) Guingamp 2011}) 9... Bxe2 $14 10. Bxe2 Ne7 11. Bb5+ c6 12. dxc6 bxc6 13. Bc4 Rb8 14. O-O O-O 15. Rad1 Ng6 {[#]} (15... Nc8 $14) 16. Na4 $1 $16 {[%cal Ra4c5]} Bb4 17. Qd3 {[%cal Re3d4]} Qa5 18. b3 Rbd8 {White should prevent ...Nf3+!} 19. Qb1 Nb5 20. Qc1 Ba3 21. Qc2 Bb4 22. g3 Nd4 23. Bxd4 exd4 24. f4 Be7 (24... Ne7 $14) 25. e5 Bb4 26. Qe4 Ne7 27. Kg2 ({Don't play} 27. Rxd4 $6 Bc5 $11) (27. f5 $16) 27... Bc3 28. Rf3 (28. e6 {is interesting.} f5 29. Qc2 Bb4 30. Qc1 Qc7 31. a3) 28... Nd5 {...Ne3+ would now be nice for Black.} 29. Bxd5 Rxd5 30. Rdd3 Rfd8 31. h4 h5 32. e6 (32. Rf2 $14) 32... Re8 (32... f5 $1 $15 {stays ahead.} 33. Qe2 Bb4) 33. f5 fxe6 $2 {[%mdl 8192]} (33... Re7 $16) 34. f6 $18 Rf5 35. fxg7 $2 (35. Qxc6 $18 Qd8 36. Rxf5 exf5 37. Qc4+ Kh8 38. fxg7+ Kxg7 39. Nxc3 {[%mdl 64] Pin}) 35... Rxf3 $2 (35... Re7 $16 {was worth a try.}) 36. Rxf3 {[#] Threatens to win with Qg6.} Qd5 $2 (36... Re7 37. Qxc6 Bb4) 37. Qf4 {White threatens Qf7+! and mate.} Qf5 38. Qh6 Qf4 39. Rxf4 {Av CentiPawn Loss W=-34/B=-101. Weighted=-48/-91} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "8.4"]
[White "Benjamin, Joel"]
[Black "Christiansen, Larry"]
[Result "1/2-1/2"]
[ECO "B30"]
[WhiteElo "2506"]
[BlackElo "2567"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,63,16,0,17,25,16,37,32,44,12,21,20,17,15,15,14,16,7,15,14,14,16,10,10,13,10,19,13,16,16,21,16,16,16,14,14,15,8,16,6,9,0,0,0,0,0,0,0,0,0,9,0,0,0,12,0]} 1. e4 c5 2. Nf3 Nc6 3. c3 d5 4. exd5 Qxd5 5. Na3 Bg4 6. Be2 {B22: Sicilian: 2 c3.} Nf6 7. d3 e6 8. Nc4 {White is slightly better.} Be7 9. Qa4 {Black must now prevent Ne3.} O-O {The position is equal.} 10. Ne3 Qh5 11. Nxg4 Qxg4 12. Qxg4 Nxg4 {[#]} 13. O-O $146 ({Predecessor:} 13. Bf4 Rfd8 14. h3 Nf6 15. O-O-O Nd5 16. Bg3 Bd6 17. Bxd6 Rxd6 18. g3 Nf6 19. Nd2 {½-½ (39) Zelbel,P (2405)-Abasov,N (2527) Bilbao 2014}) 13... Rad8 {[#]} 14. d4 $1 {[%mdl 512]} Nf6 {[%cal Rc5d4]} (14... cxd4 15. Nxd4) 15. dxc5 Bxc5 16. Bg5 h6 17. Bxf6 gxf6 18. Rfd1 Kg7 19. Kf1 f5 20. Rxd8 Rxd8 21. Rd1 Rxd1+ 22. Bxd1 $11 {[%mdl 4096] Endgame KBN-KBN} Kf6 23. Nd2 b6 24. h3 Bf8 25. Nc4 Ne5 26. Nxe5 Kxe5 {KB-KB} 27. Ke2 f4 28. Kd3 Bc5 29. f3 f5 30. b4 Bf2 31. Bb3 Kd6 32. Bc4 {Av CentiPawn Loss W=-3/B=-4. Weighted=-3/-4} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "8.5"]
[White "Yermolinsky, Alex"]
[Black "Novikov, Igor"]
[Result "1-0"]
[ECO "A13"]
[WhiteElo "2486"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,85,31,24,36,8,29,0,33,16,21,12,24,0,13,-7,0,9,31,33,33,30,33,30,46,49,57,57,39,39,40,26,55,40,52,47,93,93,104,102,114,74,114,63,90,92,206,207,362,362,322,291,254,297,291,291,294,283,274,64,258,257,1060,931,29965,29967,12846,10864,6411,6399]} 1. Nf3 d5 2. c4 e6 3. e3 Nf6 4. b3 c5 5. Bb2 Nc6 6. cxd5 exd5 7. Be2 Bd6 8. O-O O-O 9. d4 cxd4 10. Nxd4 Re8 {A13: English Opening: 1...e6.} 11. Nd2 a6 12. N2f3 {[#]} Ne5 $146 {The position is equal.} ({Predecessor:} 12... Bd7 13. Rc1 Qe7 14. Qc2 Ne4 15. Bd3 Nb4 16. Qb1 h5 17. Be2 h4 18. Ba1 h3 {½-½ (49) Bauer,C (2654)-Prusikin,M (2523) Switzerland 2019}) 13. Nxe5 Bxe5 14. h3 Bd7 15. Qd3 Rc8 16. a4 Qe7 17. Ba3 Bd6 18. Bxd6 Qxd6 19. Bf3 h6 20. Rfc1 Rxc1+ 21. Rxc1 Rc8 22. Rxc8+ Bxc8 23. Qc3 Bd7 24. a5 Kf8 25. b4 Ke7 26. Nb3 Be6 27. Nc5 Qc7 28. Qd4 Kf8 29. Kf1 Qc6 30. Ke1 (30. Qf4 $16) 30... Nd7 31. Kd2 Nxc5 (31... Nf6 $16) 32. Qxc5+ $18 Qxc5 $2 {[#]} (32... Ke8 33. Qxc6+ bxc6) 33. bxc5 $16 {[%mdl 4096] Endgame KB-KB} Ke7 34. Kc3 Kd7 35. Bd1 Kc6 36. Kb4 Kc7 37. Ba4 Bd7 38. Bc2 $2 {[#]} ({White has to play} 38. Bb3 $18) 38... Kc6 $2 {This move loses the game for Black.} (38... Bb5 $1 $14) 39. f4 $18 g5 $2 (39... Bc8 40. Ba4+ Kc7) 40. fxg5 hxg5 41. Ba4+ Kc7 42. Bxd7 Kxd7 43. Kc3 {Av CentiPawn Loss W=-49/B=578. Weighted=-62/175} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "9.1"]
[White "Novikov, Igor"]
[Black "Wolff, Patrick"]
[Result "1/2-1/2"]
[ECO "D82"]
[WhiteElo "2554"]
[BlackElo "2552"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,54,8,10,12,5,10,8,41,44,35,0,0,0,0,0,6,0,0,0,0,-6,9,14,9,0,0,-6,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 c5 6. dxc5 Qa5 7. Rc1 dxc4 8. Bxc4 O-O 9. Nge2 Qxc5 10. Qb3 {[#] Strongly threatening Nb5.} Qa5 {D82: Grünfeld: 4 Bf4.} 11. O-O Nbd7 12. Rfd1 Nb6 (12... Nc5 $5 {[%cal Rc5b3]} 13. Qb5 Qxb5 14. Nxb5 (14. Bxb5 a6 $11) 14... Be6 $14) 13. Bc7 Bd7 14. Nd5 Nfxd5 {[#] The position is equal.} 15. Rxd5 $146 {[%mdl 64] [#] Pin} ({Predecessor:} 15. Bxd5 Ba4 16. Qa3 Qb5 17. Rd2 Nxd5 18. Rc5 Nxc7 19. Rxb5 Bxb5 20. Qxe7 Rac8 21. h4 {0-1 (33) Xiang,Z (2423)-Lou,Y (2484) Tianjin 2018}) 15... Qa4 {White must now prevent ...Qxb3.} 16. Bxb6 axb6 17. Qxb6 Be6 18. Bb3 ({Much worse is} 18. Qxb7 Bxd5 19. Bxd5 e6 $17) 18... Qa6 19. Qxa6 Rxa6 (19... bxa6 {with more complications.} 20. Rd3 Bxb2 21. Rcd1 Bxb3 22. Rxb3 Rfb8) 20. Rb5 Bxb3 21. Rxb3 Rxa2 22. Rxb7 Rxb2 23. Rxb2 Bxb2 $11 {KRB-KRN} 24. Rb1 Ra8 25. g4 Ra2 26. Nc1 Bxc1 27. Rxc1 Kg7 {Av CentiPawn Loss W=-2/B=-2. Weighted=-3/-3} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "9.2"]
[White "Christiansen, Larry"]
[Black "Yermolinsky, Alex"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2567"]
[BlackElo "2486"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,55,43,22,35,20,31,16,25,0,26,32,33,0,0,-9,-6,-13,16,14,13,8,29,24,50,47,41,43,63,74,162,177,181,179,416,414,597,581]} 1. c4 c5 2. Nf3 Nf6 3. g3 b6 4. Bg2 Bb7 5. O-O g6 6. Nc3 Bg7 7. d4 cxd4 8. Qxd4 d6 9. Rd1 Nbd7 10. Be3 Rc8 11. Rac1 a6 {A30: Symmetrical English: Double Fianchetto and Hedgehog.} 12. b3 O-O 13. Qh4 Re8 {The position is equal.} 14. Bh6 Rc5 {With the idea ...Rh5.} 15. Bxg7 Kxg7 16. Qd4 b5 17. Nd2 Bxg2 18. Kxg2 {[#]} bxc4 $146 ({Predecessor:} 18... Qa8+ 19. f3 bxc4 20. Nxc4 Qb7 21. Ne4 Rd5 22. Qb2 Rxd1 23. Rxd1 Qc7 24. Rd2 Rd8 {1-0 (32) Grahesh,Y (2029)-Kunte,A (2467) Majitar 2019}) 19. Nxc4 Qc7 20. e4 $36 {[%mdl 2048] White has the initiative.} Kg8 21. Ne3 Qb7 22. Ncd5 Nxd5 23. Nxd5 e6 24. Ne3 $1 e5 (24... Rec8 $16 25. Rxc5 Nxc5) 25. Qxd6 $18 Rxc1 26. Rxc1 Qxe4+ $2 {[#]} (26... Re6 {was necessary.} 27. Qd3 Nf6) 27. Kg1 Nf8 (27... Qd4 $142 28. Nd5 (28. Qxa6 Nf8 $18) 28... Rd8) 28. Nd5 {Av CentiPawn Loss W=-6/B=-38. Weighted=-5/-33} 1-0

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "9.3"]
[White "Getz, Shelby"]
[Black "Benjamin, Joel"]
[Result "0-1"]
[ECO "A00"]
[WhiteElo "2298"]
[BlackElo "2506"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,63,-11,0,0,-6,-1,0,0,0,-17,-18,-21,-25,-26,-25,-52,-23,-102,-107,-92,-86,-381,-111,-110,-107,-111,-96,-105,-96,-95,-95,-93,-54,-62,-72,-95,-64,-356,-377,-357,-381,-392,-381,-384,-366,-485,-464,-29978,-29978,-29977,-29978,-29978,-29979,-29998,-29999,-29999]} 1. a3 Nf6 2. d4 g6 3. Nc3 d5 4. Bg5 Bg7 5. Qd2 h6 6. Bf4 {[#] A00: Irregular Openings.} c5 $146 {And now ...cxd4 would win.} ({Predecessor:} 6... c6 7. f3 Nh5 8. Be5 Bxe5 9. dxe5 e6 10. O-O-O Qg5 11. g4 Qxd2+ 12. Rxd2 Ng7 {½-½ (43) Zagrapan,P (2060)-Harasta,V (2220) Slovakia 1994}) 7. e3 $1 O-O 8. O-O-O {The position is equal.} Nc6 9. f3 Nh5 10. Be5 $1 Nxe5 11. dxe5 Bxe5 {Threatening ...d4.} 12. Nxd5 Be6 13. Ne2 (13. f4 $11 {remains equal.} Bg7 14. Nf3) 13... Bxd5 $1 $17 14. Qxd5 {[%mdl 64] Double Attack} Qc7 $1 15. f4 $2 {[%mdl 8192] [#]} (15. Qb3 $17 {might work better.}) 15... Bg7 $2 (15... Bxb2+ $1 $19 {[%mdl 512]} 16. Kxb2 Rad8) 16. Ng3 Rad8 17. Qb3 Rxd1+ 18. Kxd1 Rd8+ 19. Kc1 Nxg3 $40 {[%mdl 128] Black is out for blood.} 20. hxg3 Rd6 21. c3 Qc6 {aiming for ...Qe4.} 22. Qc2 Qd5 23. e4 $2 {[%mdl 8192]} (23. Kb1 $15) 23... Qa2 $19 24. Bd3 c4 25. Qb1 Qb3 26. Bc2 Qb6 {[%cal Rb6e3]} 27. Qa2 {[#]} Bxc3 $1 {[%mdl 512]} 28. Rd1 (28. Kb1 $19 Rd2 29. a4) (28. bxc3 Qe3+) 28... Qe3+ {[%mdl 64] Double Attack. Black mates.} 29. Kb1 Rxd1+ {[%mdl 64] Overworked Piece} 30. Bxd1 Qd3+ {[%mdl 64] Double Attack} 31. Bc2 Qf1+ {[%mdl 64] Double Attack} 32. Bd1 Qxd1# {Av CentiPawn Loss W=-71/B=-50. Weighted=-109/-26} 0-1

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "9.4"]
[White "Shabalov, Alexander"]
[Black "Gurevich, Dmitry"]
[Result "1/2-1/2"]
[ECO "B56"]
[WhiteElo "2528"]
[BlackElo "2399"]
[Annotator "TA"]
[PlyCount "58"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,58,47,45,56,24,20,10,8,8,6,5,16,0,18,24,18,22,0,-7,39,0,0,0,0,0,7,0,0,0,0,-10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. f3 Nxd4 7. Qxd4 g6 {B56: Classical Sicilian: Unusual Lines.} 8. Bc4 {[#] Black must now prevent e5.} Bg7 9. O-O (9. Bg5 {is more complex.} O-O 10. Qe3 Qc7 11. Qd3 a6 12. O-O-O) 9... O-O 10. Qf2 {[#]} Be6 $146 ({Predecessor:} 10... a6 11. Be3 b5 12. Bb3 Bb7 13. Rad1 b4 14. Ne2 Qb8 15. c4 a5 16. Ba4 Rc8 {½-½ (66) Krabbenbos,J (1794)-Blair,M (1733) LSS email 2008}) 11. Bb3 Qc8 12. Be3 b6 13. Rad1 Bxb3 14. axb3 Qb7 15. Bd4 Rac8 16. Nd5 Nxd5 {The position is equal.} 17. Bxg7 Kxg7 18. Rxd5 Rc5 19. Rfd1 Rfc8 20. c3 a5 21. b4 Rxd5 22. Rxd5 axb4 $11 {[%mdl 4096] Endgame KQR-KQR} 23. Qd4+ {[%mdl 64] [#] Double Attack} Kg8 24. Qxb4 Rc5 25. Rxc5 dxc5 26. Qc4 Qc6 27. b4 Qd6 28. bxc5 bxc5 29. Qe2 Kg7 {Av CentiPawn Loss W=-4/B=-2. Weighted=-5/-2} 1/2-1/2

[Event "USA-ch Seniors 2020"]
[Site "Saint Louis"]
[Date "2020.10.19"]
[Round "9.5"]
[White "Goldin, Alexander"]
[Black "Kaidanov, Gregory"]
[Result "1/2-1/2"]
[ECO "A08"]
[WhiteElo "2542"]
[BlackElo "2549"]
[Annotator "TA"]
[PlyCount "48"]
[EventDate "2020.10.17"]
[EventType "tourn"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,35,39,36,41,37,35,41,44,37,56,45,44,52,26,27,27,43,37,38,12,46,0]} 1. Nf3 d5 2. g3 c5 3. Bg2 Nc6 4. d4 Nf6 5. O-O cxd4 6. Nxd4 e5 7. Nxc6 bxc6 8. c4 Be6 $1 {8...Be6 is better than 8...Be7.} 9. Qa4 {[#] Hoping for cxd5. D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Qd7 10. Nc3 Rc8 11. cxd5 cxd5 12. Qxd7+ Kxd7 13. Rd1 Bc5 14. Nxd5 Nxd5 15. Bxd5 Bxd5 16. Rxd5+ Ke6 17. Rd1 Rhd8 18. Bd2 {[#]} {Predecessor:} Bd4 $146 19. Bb4 Bxb2 20. Rxd8 Rxd8 21. Rb1 Bd4 22. Rc1 Bb6 23. e3 h5 24. h4 Rd5 {½-½ (50) Rozum,I (2581)-Tregubov,P (2578) Sochi 2018} 1/2-1/2

