[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.06"]
[Round "1.1"]
[White "Sevian, Samuel"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2654"]
[BlackElo "2714"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,60,31,14,15,9,17,17,10,-25,-4,-8,20,22,25,0,0,0,0,0,0,0,0,0,0,0,20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. h3 Be7 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} 10. Nc3 Nh4 {Black wants to play ...Nxf3+.} 11. Nxh4 Bxh4 12. g4 h5 13. f3 {[#]} f6 $146 ({Predecessor:} 13... Ke7 14. Kg2 f6 15. Bf4 Be6 16. exf6+ gxf6 17. Bxc7 f5 18. gxf5 Bxf5 19. Ne4 Rhg8+ {1-0 (38) Molnar,E (2098)-Kvassay,P (2027) Slovakia 2016}) 14. exf6 gxf6 15. Be3 Ke7 {The position is equal.} 16. Bf2 hxg4 17. hxg4 Be6 18. Rae1 Kf7 19. Bxh4 Rxh4 20. Kg2 Rg8 21. Rh1 (21. Ne4 {keeps more tension.} Rgh8 22. Nf2 Bc4 23. Rg1 c5 24. Kg3) 21... Rxh1 22. Rxh1 $11 {[%mdl 4096] Endgame KRB-KRN} Bf5 23. Rd1 Be6 24. Rh1 Bf5 25. Rd1 Be6 26. Rh1 Bf5 27. Rd1 Be6 28. Rh1 Bf5 29. Rd1 Be6 30. Rh1 Bf5 {Not much happened in this game.  Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.06"]
[Round "1.2"]
[White "Robson, Ray"]
[Black "Naroditsky, Daniel"]
[Result "1-0"]
[ECO "B03"]
[WhiteElo "2669"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 27,95,48,51,33,49,37,37,41,81,33,47,20,47,48,58,51,111,104,90,105,177,172,167,170,144,166,156,168,220,215,230,232,288,281,289,269,325,332,339,337,315,314,356,356,349,349,368,361,843,841,791,779,745,0,775,0,737,731,1096,1088,1066,1027,564,919,29983,29984,12844,12842,29986,29987]} 1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Nc6 7. Be3 Bf5 8. Nc3 e6 9. Nf3 Be7 10. Be2 O-O 11. O-O f6 12. exf6 Bxf6 13. Qd2 {13.b3 gains popularity.} Qe7 14. Rad1 Rad8 15. Kh1 {B03: Alekhine's Defence: Four Pawns Attack.} h6 16. h3 Rd7 {[#]} 17. Qc1 $146 {White is slightly better.} ({Predecessor:} 17. c5 Nd5 18. Bg1 Qd8 19. Bh2 Rdf7 20. Bb5 Bg6 21. Qe2 Qe8 22. Rfe1 Re7 23. Ne4 {1-0 (52) Byrne,M-Bradney,R (1871) ICCF email 2017}) 17... Re8 18. Rd2 Qd8 {[%cal Rf6d4]} 19. Rfd1 Kh8 20. b3 Bh7 21. Bg1 Nc8 {White leaves nothing to chance now.} (21... Bg6 $14) 22. d5 $16 exd5 23. Nxd5 Be4 (23... Be5 $16 {was necessary.}) 24. Nxf6 $18 Rxd2 25. Nxd2 ({Not} 25. Rxd2 Qxf6 26. Qb2 Qg6 $11) (25. Nxe8 $6 Rxd1 26. Bxd1 (26. Qxd1 Qxe8 27. Bh2 Qe7 $14) 26... Qxe8 $14) 25... Bxg2+ 26. Kxg2 Rxe2+ 27. Kf1 {[#] Nde4 is the strong threat.} Rxd2 (27... Re6 $142 28. Nd5 Qg5) 28. Rxd2 $40 {[%mdl 128] White is out for blood.} ({Don't play} 28. Qxd2 $6 Qxf6+ 29. Qf2 Qe6) 28... Qxf6+ 29. Rf2 Qd8 30. Qd2 {Strongly threatening Qxd8+.} Qe8 31. Qf4 {aiming for Qf8+.} Kg8 32. Qxc7 Qe6 33. Qg3 ({Inferior is} 33. Qxb7 Qxh3+ 34. Ke2 Qg4+ 35. Kf1 Qh3+ 36. Rg2 N8e7 $11) 33... Nd6 {intending ...Nf5.} 34. Qg4 Qe7 35. Bh2 Nf7 36. Qc8+ Kh7 37. Qc7 Qe4 (37... Qxc7 38. Bxc7 Ng5) 38. Qxf7 Qh1+ 39. Ke2 Qe4+ 40. Kf1 Qh1+ 41. Ke2 Qe4+ 42. Kd2 Nd4 43. Qf4 Qc2+ 44. Ke3 Qc3+ 45. Ke4 Ne6 46. Qf5+ {[%mdl 64] Double Attack} Kh8 47. Be5 Ng5+ {[#]} 48. Qxg5 $3 {[%csl Ge5][%cal Rg5g7][%mdl 512] Weighted Error Value: White=0.38/Black=0.25} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.06"]
[Round "1.3"]
[White "Xiong, Jeffery"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "2700"]
[BlackElo "2778"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,96,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,2,2,3,3,5,10,1,1,39,26,38,31,48,43,57,39,56,33,52,12,12,12,12,12,16,13,14,14,64,64,65,59,58,26,39,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,3,0,0,0,7]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 d5 6. e5 Ne4 7. Bd3 c5 $1 {[%cal Rc5d4]} 8. Nf3 $1 {The main line 8.Nf3 scores better than 8.Nge2. E32: Nimzo-Indian: Classical (4 Qc2): 4...0-0.} cxd4 9. Nxd4 Nd7 10. Bf4 Qh4 11. g3 Qh5 12. O-O g5 13. cxd5 Bxc3 14. bxc3 exd5 15. Be3 Nxe5 16. f3 Nc5 17. Bf5 Ne6 18. Rae1 Nxd4 19. Bxd4 Nc6 {[#]} 20. f4 $146 ({Predecessor:} 20. Bc5 Bxf5 21. Qxf5 Rfe8 22. Rxe8+ Rxe8 23. Qd7 Re2 24. Qc8+ Kg7 25. Qf8+ Kg6 26. Qg8+ Kf6 27. Qh8+ Kg6 28. Qg8+ Kf6 29. Qh8+ Kg6 30. Qg8+ {½-½ (30) Mamedyarov,S (2767)-Navara,D (2717) Batumi 2019}) 20... gxf4 21. Rxf4 {Hoping for Rg4+.} Bxf5 22. Rxf5 Nxd4 23. cxd4 Qh6 (23... Qg4 {feels hotter.} 24. Rf4 Qd7 25. Re5 f6 26. Ref5 Rae8) 24. Qc7 Rac8 25. Qe5 f6 26. Qxd5+ Kh8 27. Rf2 Rc1 28. Qe6 Rd8 29. d5 Rxd5 {...Re5! is the strong threat.} 30. Kg2 {Intending Qe8+ and mate.} Rxe1 31. Qc8+ {[%mdl 64] [#] Double Attack} Kg7 32. Qxb7+ {[%mdl 64] Double Attack} Kg6 33. Qxd5 $11 {[%mdl 4096] Endgame KQR-KQR} Re7 (33... Qf8 {is interesting.} 34. Qf5+ Kg7 35. Qg4+ Kf7 36. Rd2 Re7) 34. Rf4 Qg5 35. Qg8+ Rg7 36. Qe8+ Rf7 $1 37. h4 Qd5+ {The position is equal.} 38. Kh2 Qd2+ 39. Kh3 Qd7+ {[%mdl 64] [#] Double Attack} 40. Rg4+ Kh5 41. Qxd7 Rxd7 {KR-KR} 42. Ra4 Kg6 43. Kg4 h5+ 44. Kf4 Re7 45. Ra5 Rc7 46. Ra4 Re7 47. Ra5 Rc7 48. Ra4 Re7 {Weighted Error Value: White=0.05/Black=0.03} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.06"]
[Round "1.4"]
[White "Swiercz, Dariusz"]
[Black "Burke, John M"]
[Result "0-1"]
[ECO "C77"]
[WhiteElo "2647"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,94,15,18,20,29,29,26,23,34,27,38,51,70,22,30,27,55,-68,-56,-59,56,12,20,18,18,10,25,0,19,-10,61,43,45,38,293,7,25,0,0,0,0,0,0,0,0,0,0,0,0,-22,52,-7,-8,-26,0,-101,-107,-99,-110,-104,-55,-133,-33,-183,-179,-194,-173,-615,-614,-1236,-1147,-1343,-1290,-1185,-1080,-1972,-1833,-1617,-2231,-4943,-2829,-2164,-3017]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Bc5 7. c3 {is currently scoring better than 7.0-0.} d6 8. Bg5 {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines.} h6 9. Bh4 g5 10. Bg3 {White has an edge.} Ba7 $5 {[%mdl 4] An interesting side line.} 11. Nbd2 {[#]} Ne7 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 11... Na5 12. Bc2 Nh5 13. b4 Nxg3 14. hxg3 Nc6 15. Bb3 Qf6 16. Qe2 Rb8 17. a4 Bb6 {0-1 (92) Sjugirov,S (2663)-Petrosyan,M (2625) Chess.com INT 2021}) 12. d4 exd4 13. cxd4 (13. Nxd4 $5 {[%cal Rd1f3]} Bg4 14. f3 $14) 13... g4 {[#]} 14. e5 $1 Nh5 ({Much weaker is} 14... gxf3 $6 15. Qxf3 Be6 16. Qxf6 $16) (14... dxe5 15. Bxe5) 15. Nh4 (15. exd6 $1 $14 cxd6 16. Ne4) 15... Nxg3 $15 16. hxg3 d5 (16... Bxd4 $15 17. e6 Bxe6 18. Bxe6 fxe6 19. Qxg4 Bxb2) 17. Nf1 Be6 18. Ne3 Qd7 19. Qd3 O-O-O $1 20. a4 {Hoping for axb5.} Kb7 21. Bc2 c6 (21... b4 $11) 22. O-O Rhf8 23. Rfe1 f6 $2 {[%mdl 8192]} (23... b4 $14) 24. exf6 $2 ({White must play} 24. axb5 $18 fxe5 25. bxa6+ Ka8 26. dxe5) 24... Rxf6 $11 25. axb5 (25. b4 {is more complex.} Qd6 26. Qc3 Bd7 27. Re2 Rf7 28. Bd3) 25... cxb5 26. Qa3 Qd6 27. Nxg4 {[%mdl 64] Pin} Qxa3 28. Rxa3 Bxg4 29. Rxe7+ Rd7 30. Rxd7+ Bxd7 31. Rd3 Re6 ({Black should play} 31... Rc6 $11 32. Bb3 Kc7) 32. Kf1 ({Better is} 32. Rd2 $14) 32... b4 {And now ...Bb5 would win.} 33. Rd1 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 34. Nf5 (34. b3 $11 {keeps the balance.}) 34... Bb5+ $1 $17 35. Bd3 Bxd3+ 36. Rxd3 {[%mdl 4096] Endgame KRB-KRN} a4 37. Rd1 {[#]} (37. f3 $15) 37... Kc6 (37... Ka6 $1 $17) 38. g4 {[#]} ({White should try} 38. Ne3 $1 $15) 38... Kb5 $1 $19 39. Ne3 Re4 40. Rc1 $2 (40. Nf5 Rxg4 41. g3) 40... Bxd4 {[%mdl 64] Double Attack. Black is clearly winning.} 41. Nxd5 Bxb2 42. Nc7+ Ka5 43. Rc6 b3 44. Rxh6 a3 45. Ra6+ Kb4 46. f3 Re5 47. f4 Ra5 {Weighted Error Value: White=0.86/Black=0.29} 0-1

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.06"]
[Round "1.5"]
[White "Lenderman, Aleksandr"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2607"]
[BlackElo "2760"]
[Annotator "TA"]
[PlyCount "124"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,124,21,16,15,19,38,35,25,12,11,13,13,15,54,44,29,38,45,58,92,100,201,202,229,231,142,90,89,66,64,70,43,49,50,50,52,53,49,49,123,122,114,112,134,123,116,137,117,76,64,85,93,74,95,58,49,15,15,16,25,17,18,19,31,27,27,27,29,24,21,21,25,28,41,36,40,0,0,0,0,0,0,0,0,0,0,0,0,0,2,0,4,2,2,3,10,6,6,6,10,10,10,0,11,0,12,2,3,0,19,0,10,0,19]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 b6 7. Bd3 dxc4 {Nowadays more popular than 7...Bb7. D37: Queen's Gambit Declined: 5 Bf4.} 8. Bxc4 Ba6 9. Bxa6 Nxa6 {White is slightly better.} 10. Qe2 Qc8 11. O-O c5 12. e4 Rd8 13. d5 exd5 14. exd5 Qb7 15. Rad1 {[#]} h6 $146 ({Predecessor:} 15... Nb4 16. d6 Bf8 17. Be5 Nd7 18. Bg3 Re8 19. Qc4 Rad8 20. Nb5 Nf6 21. Nc7 Re4 {1-0 (57) Dardha,D (2485)-Di Benedetto,E (2386) Villorba 2021}) 16. Be5 Ng4 {[#]} (16... Re8 $16) 17. Bg3 $1 $18 Nf6 18. d6 Bf8 19. Qc4 (19. Bh4 $142) 19... Nb4 $16 20. Rfe1 Qa6 21. Qxa6 Nxa6 22. a3 Nb8 23. Ne5 $36 {[%mdl 2048] White fights for an advantage.} a6 $1 24. Bh4 g5 25. Bg3 Nbd7 ({Black should try} 25... Kg7 $14) 26. Nc6 Re8 27. Ne7+ Kh7 28. f4 gxf4 29. Bxf4 b5 30. Ncd5 Nxd5 31. Rxd5 c4 32. Re3 Rad8 33. Rf5 f6 34. Rg3 {Black must now prevent Rh5.} Bxe7 35. dxe7 Rxe7 36. Rh5 {[%csl Gf4][%cal Rh5h6]} Rg7 37. Rxg7+ Kxg7 $11 {[%mdl 4096] Endgame KRB-KRN} 38. Rd5 {Threatens to win with Bc7.} Kf7 $1 39. Bc7 Ke6 {Hoping for ...Rc8.} 40. Rd6+ {[%mdl 64] [#] Double Attack} Ke7 {...Rc8 is the strong threat.} 41. Rxa6 Rc8 42. Ba5 Kf7 43. Bc3 Rc5 44. Rd6 Ke7 {The position is equal.} 45. Rd4 {Strongly threatening Bb4.} Ke6 46. h3 h5 47. Kh2 Ne5 48. Rd8 Nd7 49. Rh8 Rf5 50. Rc8 Rc5 51. Ra8 Rd5 52. a4 bxa4 $1 53. Rxa4 Rc5 54. Ra6+ Kf5 55. Rd6 Ne5 56. Kg3 Rc8 57. Kh2 Rb8 58. Rd4 Rc8 59. Rh4 Kg5 60. Rd4 Kf5 61. Rh4 Kg5 62. Rd4 Kf5 {Weighted Error Value: White=0.06/Black=0.07} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.06"]
[Round "1.6"]
[White "Caruana, Fabiano"]
[Black "Bruzon Batista, Lazaro"]
[Result "1/2-1/2"]
[ECO "C65"]
[WhiteElo "2800"]
[BlackElo "2645"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,88,0,0,-10,7,1,21,32,35,0,0,0,0,-14,-16,-27,-28,-18,-33,-52,-55,-60,-48,-106,-114,-108,-113,-103,-104,-104,-102,-112,-74,-68,-60,-53,-31,-31,-23,-31,-34,-30,0,0,0,-42,-50,-67,-68,-76,-74,-68,-64,-93,-77,-122,-99,-93,-61,-61,-62,-64,-57,-52,-53,-50,-33,-37,-36,-33,-40,-39,-9,-9,0,-37,0,-8,0,-61,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Bg5 h6 6. Bh4 {C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5.} Be7 $5 {[%mdl 4] Exploring less charted territory.} 7. Nc3 d6 8. d4 {The position is equal.} Bd7 9. Bg3 {[%cal Rd4e5]} exd4 10. Nxd4 O-O {[#]} 11. Nb3 $146 ({Predecessor:} 11. O-O Nxd4 12. Qxd4 Bxb5 13. Nxb5 Nh5 14. c4 Re8 15. Qd5 Nxg3 16. fxg3 Bf6 17. Qxb7 a6 18. Nxc7 {0-1 (46) Koshaev,V (2015)-Frolov,D (2399) Novosibirsk 1999}) 11... a6 12. Be2 Re8 13. Qd2 b5 {[%cal Bb7b5,Bb5b4][%mdl 32] ...b4 is the strong threat.} 14. f3 b4 15. Nd5 Nxd5 16. exd5 {[#]} (16. Qxd5 $15 Rf8 17. O-O-O) 16... Bg5 $1 $17 17. f4 {[#]} Bg4 $1 18. Nc1 Bf6 19. O-O {[#]} Bxe2 20. Nxe2 Ne7 21. c4 bxc3 22. Nxc3 Bxc3 23. bxc3 Qd7 24. c4 Nf5 25. Bf2 Re4 26. Rae1 Rae8 27. g3 Rxc4 28. Qd3 Rxe1 29. Rxe1 Ra4 30. Rb1 f6 $1 ({And not} 30... Rxa2 31. g4 $16) 31. a3 Ne7 32. Rb8+ Kf7 33. Rb7 Ra5 34. Qc3 Rxd5 {White must now prevent ...Rd1+.} 35. Rxc7 Rd1+ 36. Kg2 Qb5 {Hoping for ...Qf1+.} 37. Qc4+ ({But not} 37. Qe3 $2 Qf1+ 38. Kf3 {[#]} Rd3 $1 $19) 37... Qxc4 38. Rxc4 $15 {[%mdl 4096] Endgame KRB-KRN} a5 39. Ra4 $1 Rd5 40. Bb6 $1 Nc6 41. Rc4 Ne7 42. Ra4 $1 Nc6 43. Rc4 Ne7 (43... Rd2+ $11 44. Kh3 Ne7) 44. Ra4 $1 Nc6 {Weighted Error Value: White=0.08/Black=0.07} (44... Rd2+ $15 45. Kg1 d5) 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.07"]
[Round "2.1"]
[White "Dominguez Perez, Leinier"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "C82"]
[WhiteElo "2760"]
[BlackElo "2800"]
[Annotator "TA"]
[PlyCount "215"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,215,39,53,50,58,42,21,23,31,31,27,31,28,27,20,21,31,30,33,25,11,10,14,11,11,39,26,57,47,91,91,95,93,106,88,131,131,119,129,140,137,139,88,272,281,305,286,264,264,191,126,125,73,143,141,145,132,145,135,194,168,168,142,154,153,181,146,146,0,157,170,189,185,185,185,184,161,156,156,155,146,154,138,146,146,146,138,138,138,146,146,146,146,146,146,146,140,147,129,140,106,106,106,106,106,120,0,120,106,127,127,132,146,147,64,64,64,64,0,0,0,0,0,16,8,64,64,64,64,64,64,64,64,64,64,64,64,64,64,64,0,0,0,64,64,64,50,50,50,64,64,64,0,51,40,41,41,41,0,41,0,41,26,64,51,51,40,40,42,64,42,43,26,26,0,0,0,26,26,26,0,0,0,0,0,0,0,0,0,0,0]} 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. c3 Bc5 10. Nbd2 O-O 11. Bc2 Bf5 12. Nb3 Bg6 13. Nfd4 Bxd4 14. Nxd4 Nxd4 {C82: Open Ruy Lopez: 9 c3 without 9...Be7.} 15. cxd4 c5 16. f3 cxd4 17. Qxd4 Rc8 18. Bb3 ({Reject} 18. fxe4 Rxc2 19. exd5 Rc4 $15) 18... Nc5 19. Be3 (19. Bxd5 $2 Ne6 $17) 19... Bd3 20. Rfd1 Nxb3 21. axb3 Bc2 {[%mdl 64] [#] Double Attack} 22. Rdc1 $146 {[%mdl 2048] White has the initiative.} ({Predecessor:} 22. Rd2 Bxb3 23. Qb4 Ba4 24. Bc5 Re8 25. Qd4 Bb3 26. Rxa6 Qc7 27. Ra3 Qxc5 28. Rxb3 Rxe5 29. Qxc5 Rxc5 {0-1 (58) Berg,E (533)-Sulskis,S (2537) Germany 2014}) 22... Bxb3 23. Rxa6 Rxc1+ 24. Bxc1 Qc8 25. Ra1 Qc4 26. Be3 Bc2 27. e6 f6 28. Qa7 Bg6 29. Rc1 Qe2 30. h3 $1 {Threatens to win with Rc7.} d4 31. Qxd4 Re8 32. Rc6 $1 Qd3 33. Qa7 Kh8 34. Kh1 (34. Bd4 $142) 34... Bh5 $2 (34... Qb3 $16) 35. Qc5 $18 Bg6 36. Rc8 $1 {[%cal Rc8e8] Intending Rxe8+ and mate.} h6 37. Rxe8+ Bxe8 38. Bxh6 Kh7 $16 39. Be3 ({White should play} 39. Bc1) 39... Qb1+ (39... Qb3 $142) 40. Bc1 Qa2 41. Qe3 Qd5 42. Bd2 Kg6 (42... Qd6 $16 43. Bc3 Kg8) 43. Bc3 Bc6 44. Bd4 Kh7 45. Kg1 Qc4 46. Kh2 Qd5 47. Kg1 Qc4 $1 48. h4 Bd5 49. e7 Bc6 50. h5 Be8 51. h6 Qc6 52. hxg7 Kxg7 53. b4 Qd5 54. Kf2 Kf7 55. Bc5 Kg6 56. Qf4 Qa2+ 57. Kg3 Qe6 58. Qd2 Qe5+ {[#]} 59. Kf2 $1 Kg7 60. Bd6 Qe6 61. Qf4 Kg6 62. g4 Qa2+ 63. Kg3 Qe2 64. Qc1 Kf7 65. Qh1 Kg7 66. Qc1 Kf7 $1 67. Qc3 Qd1 68. Bc5 {Black must now prevent Qe3.} Qe2 69. Qb3+ Kg7 {[#]} 70. Qd5 (70. Qe3 $1 $16 {[%cal Re3e2]} Qxe3 71. Bxe3) 70... Qe1+ $14 71. Kg2 {Hoping for Qd3.} Qe2+ 72. Kh3 (72. Bf2 $1 $14) 72... Qf1+ $1 $11 73. Kh2 Qe2+ $1 74. Kg3 (74. Kg1 {with more complications.} Qe1+ 75. Kg2) 74... Qe1+ 75. Bf2 Qxe7 (75... Qxb4 $11 76. Qe6 Qc3) 76. Qd2 (76. Qd4 {feels hotter.} Bc6 77. Be3 Kf7 78. Qd2 Qe5+ 79. Kg2) 76... Qe5+ 77. Kg2 Bc6 78. Bd4 Qe6 {Threatening ...Qxg4+.} 79. Kf2 Qd6 80. Qg5+ Kf7 81. Qh5+ Kg7 82. Be3 {White threatens Bh6+ and mate.} Qd3 $1 83. Bh6+ (83. Qc5 $14 Qd5 84. Qxd5 Bxd5 85. Bd4) 83... Kg8 84. Be3 Qc2+ (84... Kg7 $1 $11) 85. Kg3 $14 Qd3 86. Qh6 Kf7 87. Qf4 {Strongly threatening Bd4.} Qd1 88. Qc7+ Qd7 89. Qf4 Qd1 $1 90. Bf2 {g5 is the strong threat.} Kg6 91. Qf5+ (91. Kg2 {seems wilder.} Qd3 92. Qe3 Qc4 93. Qd4 Qxd4 94. Bxd4 f5 95. Kg3) 91... Kg7 92. Qf4 {And now g5 would win.} Kg6 $1 93. Qf5+ (93. Bd4 {with more complications.} Qe1+ 94. Kg2 Qe2+ 95. Bf2 Qd3 96. Qe3) 93... Kg7 94. Kg2 Qd5 95. Qf4 Qe5 96. Qd2 (96. Be3 {is interesting.} Qb2+ 97. Kf1 Qe5 98. Qh6+ Kf7 99. Bc5) 96... Qe6 97. Qd4 Qd5 98. Qc3 Qe6 99. Kf1 Qd5 100. Ke2 (100. Bd4 {keeps more tension.} Qxf3+ 101. Qxf3 Bxf3 102. g5 Kg6 103. Bxf6 Kf5 104. Kf2) 100... Qa2+ 101. Kf1 Qd5 102. g5 Qxf3 103. gxf6+ (103. Qxf3 {looks sharper.} Bxf3 104. Bd4 Kg6 105. Kf2 Bd5 106. Bxf6 Kf5 107. Ke3) 103... Qxf6 {The position is equal.} 104. Qxf6+ Kxf6 $11 {KB-KB} 105. Ke1 Kf7 106. Kf1 Kf6 107. Ke1 Kf7 108. Kf1 {Black defended with fortune.  Weighted Error Value: White=0.11/Black=0.12} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.07"]
[Round "2.2"]
[White "Burke, John M"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2554"]
[BlackElo "2607"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,91,7,8,5,0,1,18,29,17,0,0,0,0,0,8,0,-12,-13,-9,-4,-8,-14,0,0,1,0,2,0,0,0,23,18,15,-2,-4,-27,-32,-50,0,-9,-29,-8,8,0,97,44,58,25,14,18,19,21,20,28,15,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Nd5 Nxd5 8. exd5 Nb8 9. a4 Be7 10. Be2 O-O 11. O-O {B33: Sicilian: Pelikan and Sveshnikov Variations.} Nd7 12. Bd2 a6 13. Na3 a5 {[#]} 14. Kh1 $146 ({Predecessor:} 14. Nb5 f5 15. f4 Nf6 16. Kh1 Ne4 17. Be3 exf4 18. Bxf4 Bd7 19. Bd3 Bxb5 20. axb5 {½-½ (66) Sevian,S (2660)-Swiercz,D (2649) Lichess.org INT 2020}) 14... Nb6 15. Be1 f5 16. Nb5 Bd7 17. b4 axb4 18. a5 $1 Bxb5 19. Bxb5 Nd7 20. Bxb4 Qc7 21. Ra3 Nc5 22. Rc3 Kh8 23. Qh5 g6 24. Qe2 e4 25. f3 {And now fxe4 would win.} Bf6 26. Rc4 {[%cal Rf3e4]} exf3 27. Qxf3 Qe7 28. Bxc5 {[#] Black must now prevent Bb6.} dxc5 29. Qa3 Rfd8 30. a6 {[%cal Ba5a6,Ba6b7][%mdl 32]} Rxd5 (30... Qe5 {is interesting.} 31. Qxc5 Rxd5 32. axb7 Rad8 33. Qa7 Rxb5 34. Rc8 Kg8) 31. Qf3 $1 {[%cal Rf3d5]} Qd6 (31... Rd6 $11 {remains equal.}) 32. Ra4 ({White should try} 32. axb7 $16 Rd8 33. Ra4) 32... Bd8 ({Don't go for} 32... bxa6 $2 33. Bc4 $18) 33. axb7 (33. Raa1 {keeps more tension.} Rd4 34. c3 Rd2 35. Rad1 bxa6 36. Rxd2 Qxd2 37. Qxa8 axb5 38. Qb8) 33... Rxa4 34. Bxa4 Bc7 {[%csl Gc7][%cal Rd6h2]} 35. g3 Kg7 36. Re1 Rd4 37. Bc6 {The position is equal.} h5 38. Be8 h4 {[%cal Rh4g3]} 39. Qc6 Rd1 40. Rxd1 Qxd1+ {[%mdl 64] [#] Double Attack} 41. Kg2 Qe2+ 42. Kg1 Qe1+ 43. Kg2 Qe2+ 44. Kg1 Qe1+ 45. Kg2 Qe2+ 46. Kg1 {Weighted Error Value: White=0.06/Black=0.09} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.07"]
[Round "2.3"]
[White "So, Wesley"]
[Black "Swiercz, Dariusz"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "2778"]
[BlackElo "2647"]
[Annotator "TA"]
[PlyCount "63"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,63,25,25,22,20,36,32,31,38,39,0,0,0,0,7,0,0,0,0,27,27,18,21,25,31,42,40,50,66,66,62,55,48,177,179,269,260,324,321,436,429,447,295,454,446,500,511,507,492,752,738,775,762,696,647]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nf6 6. Nc3 Nc6 {B52: Sicilian: Moscow Variation with 3...Bd7.} 7. d4 $1 {The main line 7.d4 scores better than 7.0-0.} Qg4 {And now ...cxd4 would win.} 8. d5 Nd4 {White is slightly better.} 9. Nxd4 {aiming for Qa4+.} Qxd1+ ({Reject} 9... cxd4 10. Qxg4 Nxg4 11. Nb5 $16) 10. Nxd1 {Strongly threatening Nb5.} cxd4 11. f3 {[#]} Rc8 $146 ({Predecessor:} 11... e5 12. Bg5 Be7 13. Bxf6 Bxf6 14. a4 Kd7 15. Ke2 Rhc8 16. b3 Bd8 17. Nb2 Ba5 {½-½ (32) Ma,Q (2559)-Li,C (2686) Xinghua 2013}) 12. b3 e5 13. g4 Be7 14. Ke2 h5 15. g5 Nd7 16. Bd2 O-O 17. Nf2 a6 18. Nd3 f5 19. gxf6 gxf6 20. Rhg1+ Kh7 21. Rg3 h4 {[#] A mistake that costs the game.} (21... Rg8 $14) 22. Rg4 $1 $18 {[%cal Rg4h4]} f5 (22... Rg8 {was worth a try.} 23. Rxh4+ Kg7 24. Rg1+ Kf8) 23. exf5 Rxf5 24. Rag1 {Threatens to win with Rg7+.} Re8 25. Nf2 Nf6 26. Rg7+ Kh8 27. Rf7 {White is clearly winning.} Rh5 {If only Black now had time for ...Rh7....} 28. Rg6 Ng8 29. Ne4 Rd8 (29... Rh7 $142) 30. Bg5 Rh7 {[#]} 31. Rxe7 $1 {[%mdl 512]} Rxe7 32. Bxh4 {Weighted Error Value: White=0.01/Black=0.33} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.07"]
[Round "2.4"]
[White "Naroditsky, Daniel"]
[Black "Xiong, Jeffery"]
[Result "1-0"]
[ECO "D05"]
[WhiteElo "2623"]
[BlackElo "2700"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,103,3,4,8,17,3,12,0,4,0,0,0,26,17,9,13,20,16,36,21,54,10,26,16,13,0,50,54,62,43,62,62,55,58,70,72,71,66,91,77,60,78,76,77,72,82,68,50,21,18,23,29,112,118,109,90,84,82,83,83,102,95,93,102,141,137,176,163,163,169,162,176,264,269,273,275,274,273,285,271,557,549,700,594,666,664,876,858,835,824,1814,1616,3133,2280,29981,29972]} 1. d4 Nf6 2. Nf3 d5 3. e3 c5 4. Nbd2 e6 5. b3 b6 6. Bb2 {D05: Colle System with ...e6.} Bd6 7. Bd3 cxd4 8. exd4 {The position is equal.} Ba6 9. c4 O-O 10. O-O Nbd7 11. Ne5 Rc8 12. f4 Bb7 13. Qe2 Rc7 14. Rae1 {[#]} Qa8 $146 ({Predecessor:} 14... g6 15. cxd5 Bxd5 16. Ndc4 Bb4 17. Rd1 Qa8 18. Ne3 Be4 19. Nxd7 Rxd7 {1-0 (80) Ozkan,T (2019)-Szabo,B (2376) Marmaris 2019}) 15. f5 {With the idea Nxd7.} exf5 16. Rxf5 Re8 17. Ref1 Re6 18. cxd5 Bxd5 19. Ndc4 $1 Nxe5 20. dxe5 Bc5+ 21. Kh1 Ne4 {Strongly threatening ...Ng3+!} 22. R5f4 {[%cal Rd3e4]} f5 23. b4 $1 {[%cal Rb4c5]} ({Don't blunder} 23. Rxf5 $2 Ng3+ $1 {[%mdl 512]} 24. hxg3 Rh6+ 25. Rh5 Bxg2+ $1 {[%mdl 512]} 26. Kh2 Bxf1 $19) 23... Bxb4 24. Ne3 g6 ({Wrong is} 24... Bxa2 $2 25. Nxf5 Nc5 26. Rxb4 $18) 25. a3 Be7 26. Nxd5 Qxd5 27. Qf3 $1 {[%cal Rd3e4]} Nc3 {[#]} 28. Bc4 $1 Rxc4 29. Qxd5 Nxd5 30. Rxc4 b5 {Black is on the road to losing.} (30... Bc5 $1 $11 {remains equal.}) 31. Rc8+ $16 Kf7 32. Rf3 $36 {[%mdl 2048] White is in control.} Nb6 33. Rc7 Nc4 34. Bc3 Nxe5 35. Rh3 h5 36. Rxa7 f4 37. Rb7 Rc6 {Black wants to play ...f3.} 38. Rxb5 Bf6 39. Rb1 Ng4 {[#] Hoping for ...Nf2+.} 40. Be1 Rc2 (40... Bd4 $142 41. Rhb3 Rc2) 41. Rf3 $18 g5 42. h3 Ne5 {[#]} 43. Rf2 {[%cal Rf2c2]} Rc4 44. Ra2 f3 $2 (44... Ra4 {was called for.} 45. Bc3 Kg6) 45. a4 {[%cal Ba3a4,Ba4a5,Ba5a6,Ba6a7][%mdl 32]} Re4 {If only Black now had time for ...Nd3....} 46. Bg3 fxg2+ 47. Kxg2 Nd3 48. a5 h4 {[#]} 49. a6 $1 hxg3 (49... Bd4 50. a7) 50. a7 Nf4+ 51. Kxg3 Re3+ 52. Kg4 {Weighted Error Value: White=0.05/Black=0.42} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.07"]
[Round "2.5"]
[White "Sevian, Samuel"]
[Black "Robson, Ray"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2654"]
[BlackElo "2669"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,80,17,20,0,2,2,0,0,6,0,8,0,1,8,0,7,10,0,-11,-39,-31,-21,0,0,0,0,0,-12,38,0,0,0,0,-23,-35,-33,-30,-85,-95,-91,-100,-88,-81,-89,-97,-104,-57,-39,-54,-40,-49,-47,-51,-44,-29,-25,-30,-37,18,0,0,0,0,0,25,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bf4 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} Ne4 7. Rc1 Nc6 8. Nd2 g5 9. Be3 Nxc3 10. bxc3 Bd6 11. h4 Bf4 12. Bxf4 gxf4 13. e3 fxe3 {[#]} 14. fxe3 $146 ({Predecessor:} 14. Qe2 O-O 15. fxe3 Ne7 16. Qf3 Nf5 17. e4 dxe4 18. Nxe4 Qe7 19. Bd3 Nd6 20. O-O Nxe4 21. Bxe4 Qxh4 {1-0 (45) Xiong,J (2691)-Burke,J (2562) Philadelphia 2019}) 14... Qe7 15. Qf3 Bd7 16. Kf2 O-O-O 17. Qxd5 Rhg8 18. Qe4 Be6 19. Be2 f5 $1 {[%cal Rf5e4]} 20. Qf4 Qg7 21. Rh2 (21. Bf3 {is more complex.} Ne7 22. Nb3 Bc4 23. Kg1 Qf7 24. e4) 21... Ne7 22. Kg1 Nd5 23. Qf2 {[#]} (23. Qf3 $11) 23... Qh6 $1 $17 24. Nf3 Nxe3 {And now ...Ng4 would win.} 25. Ng5 Ng4 26. Bxg4 fxg4 27. Re1 Bd7 28. g3 $1 {[#] Strongly threatening Nf7.} Rgf8 29. Qd2 Qd6 30. Ne4 Qg6 31. Rf2 Bc6 32. Rxf8 Rxf8 33. d5 {h5 is the strong threat.} Bb5 (33... Bd7 $15) 34. Qd4 Qb6 35. Nc5 Bd7 36. Rf1 Re8 37. Rf6 Qb1+ {The position is equal.} 38. Rf1 Qb6 39. Rf6 Qb1+ 40. Rf1 Qb6 {Weighted Error Value: White=0.06/Black=0.07} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.07"]
[Round "2.6"]
[White "Shankland, Sam"]
[Black "Bruzon Batista, Lazaro"]
[Result "1/2-1/2"]
[ECO "C80"]
[WhiteElo "2714"]
[BlackElo "2645"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,78,37,34,42,35,51,40,47,51,47,43,52,54,60,47,51,10,10,10,10,10,10,9,10,0,0,-14,-13,-18,-25,-11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 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. Nbd2 Nc5 10. c3 d4 11. Bxe6 Nxe6 12. cxd4 Ncxd4 13. a4 Bb4 {is the new trend. C80: Open Ruy Lopez: Sidelines and 9 Nbd2.} 14. axb5 Nxf3+ ({Much worse is} 14... axb5 $6 15. Rxa8 Qxa8 16. Nxd4 $18) 15. Nxf3 axb5 {White is slightly better.} 16. Rxa8 Qxa8 17. Ng5 {Hoping for Nxe6.} Be7 18. Nxe6 fxe6 19. Qg4 {[%mdl 64] [#] Double Attack} Kf7 20. Qf4+ (20. Bg5 $5 {[%cal Rg5e7]} Re8 21. Rc1 $14) 20... Ke8 $1 {[#]} 21. Rd1 $146 ({Predecessor:} 21. Be3 Rf8 22. Qg4 Kf7 23. h3 Qd5 24. Qh5+ Kg8 25. Rd1 Qc6 26. Rc1 Qd7 27. Qg4 {1-0 (56) Bacrot,E (2705)-Fressinet,L (2676) Germany 2009}) 21... Rf8 22. Qg4 Qa4 23. Qxa4 bxa4 $11 {[%mdl 4096] Endgame KRB-KRB} 24. Kf1 Bc5 25. f4 g5 26. Ke2 gxf4 27. Kf3 Be3 {The position is equal.} 28. g4 Ke7 29. Bxe3 fxe3+ 30. Kxe3 {KR-KR} Rb8 31. Rd2 h6 32. h4 Rb3+ 33. Ke4 c5 34. h5 Rb4+ 35. Kf3 Rb3+ 36. Kf4 Rb4+ 37. Kf3 Rb3+ 38. Kf4 Rb4+ 39. Kf3 Rb3+ {Weighted Error Value: White=0.03/Black=0.01} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.08"]
[Round "3.1"]
[White "Swiercz, Dariusz"]
[Black "Naroditsky, Daniel"]
[Result "1-0"]
[ECO "B76"]
[WhiteElo "2647"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "117"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,117,51,45,38,52,56,79,83,91,73,79,54,70,54,61,57,61,58,58,53,62,60,61,58,62,59,64,54,58,60,62,69,58,54,60,55,60,55,68,56,66,0,68,54,63,58,63,63,116,122,107,103,112,100,539,126,5419,5424,6922,7025,5483,5427,6647,6616,5887,5828,5427,5598,5362,5313,4878,5065,4735,4256,4256,1976,5737,5616,5030,4720,3504,2452,29970,29972,29973,29975,29975,29976,29976,29976,29984,29985,29985,29985]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 Nc6 8. Qd2 O-O 9. O-O-O d5 10. exd5 Nxd5 11. Nxc6 bxc6 12. Bd4 e5 13. Bc5 Re8 14. Ne4 {B76: Sicilian Dragon: Yugoslav Attack, 9 g4 and 9 0-0-0.} Qc7 {14...Be6 is not played anymore.} 15. h4 f5 16. Nd6 {White is better.} Rd8 17. Nxc8 Raxc8 18. h5 Nb6 $1 19. Bxb6 Rxd2 20. Bc4+ Kf8 21. Bxc7 Rxd1+ 22. Rxd1 Rxc7 23. hxg6 $14 {[%mdl 4096] Endgame KRB-KRB} Bh6+ 24. Kb1 hxg6 25. Rd6 Kg7 26. b4 Bf4 27. Re6 Rb7 28. a3 a5 29. Kb2 axb4 30. a4 Ra7 31. Kb3 $1 {[%mdl 1024] White has compensation.} c5 32. Bb5 Kf7 33. Bc4 {Ra6+ is the strong threat.} Kg7 34. Bd3 {[#]} Bg3 $146 ({Predecessor:} 34... Kf7 35. Rb6 Ra5 36. Bc4+ Kg7 37. Bb5 e4 38. fxe4 fxe4 39. Re6 e3 40. Kc4 Ra7 41. Kxc5 Rc7+ 42. Bc6 Kf7 {1-0 (59) Kollars,D (2621)-Blomqvist,E (2536) Stavanger 2021}) 35. Rc6 Ra5 36. Bb5 Ra7 {White leaves nothing to chance now.} (36... Bf2 $14) 37. Rxc5 $16 e4 38. fxe4 fxe4 39. Rc6 Rc7 $2 {[%mdl 8192]} (39... e3 $16) 40. Kxb4 $2 (40. Rxc7+ $1 $18 Bxc7 41. Kxb4) 40... Rxc6 $4 {[%mdl 8192]} (40... Be1+ $16 41. c3 Rxc6 42. Bxc6 e3) 41. Bxc6 $18 {KB-KB} e3 42. Bf3 $1 Kf6 43. a5 {[%cal Ba4a5,Ba5a6][%mdl 32]} Ke7 44. Kc5 Kd7 45. a6 Kc7 46. Kd5 Kb6 {[#]} 47. Be2 $1 Bh4 48. Ke6 Bd8 49. Kf7 g5 50. Kg6 Ka7 51. Kf5 Be7 52. Ke4 Bc5 53. Kd5 Bb6 54. c4 {White mates.} Kb8 55. c5 Ba7 56. Kd6 Kc8 57. Bg4+ Kd8 58. c6 Bb8+ {[#]} 59. c7+ $1 {Weighted Error Value: White=0.31/Black=0.49} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.08"]
[Round "3.2"]
[White "Lenderman, Aleksandr"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2607"]
[BlackElo "2778"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,81,23,23,23,23,-8,23,25,25,25,26,25,33,32,54,29,46,44,52,0,0,0,14,0,0,-14,-10,-8,-8,-9,-10,-16,-16,-20,-6,-6,-6,-14,-3,-2,0,-8,-5,-18,-6,-6,-6,-6,-6,-6,-6,-6,-6,-15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. e4 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} dxe4 8. Qxd8+ Kxd8 9. Ng5 {White has an edge.} Be6 10. Nxe6+ fxe6 11. Bg5 h6 $1 {[%mdl 4] 11...h6 is the recent fashion.} 12. O-O-O+ Ke7 $1 13. Bxf6+ gxf6 14. Nxe4 Bg7 {[#]} 15. Kb1 $146 (15. Bb5 $14) ({Predecessor:} 15. Bd3 f5 16. Ng3 Nc6 17. Rhe1 Be5 18. Nxf5+ exf5 19. f4 Rad8 20. fxe5 Rhf8 21. Re3 {½-½ (57) Radjabov,T (2765)-Carlsen,M (2847) chess24.com INT 2021}) 15... f5 $11 {The position is equal.} 16. Ng3 {And now Bc4 would win.} Nc6 17. Bc4 Rhd8 18. Rhe1 {[#] Black must now prevent Nxf5+.} Rxd1+ 19. Rxd1 Rd8 20. Rxd8 Nxd8 {[%mdl 4096] Endgame KBN-KBN} 21. Ne2 Nc6 22. Nf4 Nd4 23. Kc1 Kd6 24. h3 b5 25. Bd3 a6 26. g4 Bf6 {[#] ...Bg5 is the strong threat.} 27. Ne2 Nxe2+ 28. Bxe2 {KB-KB} Bd4 29. gxf5 exf5 30. f3 Ke5 31. Bd3 Kf4 32. b3 Be3+ 33. Kd1 Bd4 34. Ke2 Bc5 (34... h5 {with more complications.} 35. a4 bxa4 36. bxa4 a5 37. Kd2 Bc5) 35. a4 bxa4 36. bxa4 a5 37. Bc2 Bb6 38. Bd3 Ba7 39. Bc2 Bb6 40. Bd3 Bc5 41. Bc2 {Weighted Error Value: White=0.04/Black=0.02} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.08"]
[Round "3.3"]
[White "Caruana, Fabiano"]
[Black "Burke, John M"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "2800"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "57"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,57,0,6,8,26,2,9,2,18,12,14,16,14,6,14,20,85,91,89,97,120,134,118,114,129,89,127,116,109,114,120,114,179,178,377,387,374,380,522,518,656,642,871,855,835,786]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. d3 b5 6. Bb3 Bc5 7. c3 $1 {[%mdl 4] is more profitable than 7.0-0 at the moment.} d6 8. Bg5 {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines.} h6 9. Bh4 Ba7 10. O-O {[#] The position is equal.} Na5 $146 ({Predecessor:} 10... g5 11. Bg3 Rg8 12. d4 exd4 13. Nxd4 Nxd4 14. cxd4 Bb7 15. Re1 Kf8 16. e5 dxe5 17. Bxe5 {0-1 (85) Nandhidhaa,P (2060)-Hakimifard,R (1930) Porto Carras 2010}) 11. Bc2 g5 12. Bg3 Nh5 13. a4 Nxg3 14. hxg3 Nc6 (14... b4 $11) 15. axb5 $16 axb5 {aiming for ...Bxf2+!} 16. Na3 Ba6 17. Bb3 Ne7 18. d4 exd4 19. Nxd4 b4 {[#]} 20. Nc4 $40 {[%mdl 128] White attacks with force.} ({And not} 20. cxb4 Bxf1 21. Kxf1 O-O $15) 20... Bxc4 21. Bxc4 {Bb5+ is the strong threat.} O-O 22. cxb4 d5 (22... Bb6 $16 {was necessary.}) 23. exd5 $18 Qd6 $2 {[#]} (23... Bb6 {was called for.}) 24. Nb5 $1 {[%csl LRa7,LRd6][%cal Rb5d6]} Qxb4 25. b3 Qc5 26. Qf3 {White is clearly winning.} ({Weaker is} 26. Nxa7 Rxa7 27. Rxa7 Qxa7 $18) 26... Kg7 27. Ra6 ({Not} 27. Nxa7 Rxa7 28. Qc3+ f6 $18) 27... f6 28. Rfa1 Nc8 29. Kh2 {Weighted Error Value: White=0.00/Black=0.38} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.08"]
[Round "3.4"]
[White "Bruzon Batista, Lazaro"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2645"]
[BlackElo "2760"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,54,0,0,7,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,60,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb6 9. Nc3 O-O 10. Be3 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} Bg4 11. h3 Bh5 12. Qc2 Ba5 {12...Nxc3 gains popularity.} 13. O-O Bxf3 14. gxf3 Nxd4 15. Bxd4 Qg5+ $1 16. Kh1 Bxc3 17. bxc3 Qf5 {[#] Threatens to win with ...Ng3+!} 18. Rfc1 Qxh3+ 19. Kg1 Ng5 {[%cal Rg5f3] The position is equal.} 20. Be2 {And now f4 would win.} Nxf3+ 21. Bxf3 Qxf3 {[#]} 22. Re1 $146 ({Predecessor:} 22. Qd1 Qxd1+ 23. Rxd1 b6 24. Rd3 Rfe8 25. Rad1 Kf8 26. f4 c6 27. Kf2 Ke7 28. Rh3 {1-0 (52) Grigorian,S (2433)-Reuker,J (2399) Bremen 2020}) 22... Qg4+ 23. Kh2 Qh4+ 24. Kg2 {[#] Black must now prevent Re3.} Qg4+ 25. Kh2 Qh4+ 26. Kg2 {aiming for Re3.} Qg4+ 27. Kh2 Qh4+ {A rather calm draw.  Weighted Error Value: White=0.00/Black=0.00} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.08"]
[Round "3.5"]
[White "Robson, Ray"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "2669"]
[BlackElo "2714"]
[Annotator "TA"]
[PlyCount "128"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,128,9,34,25,44,35,32,20,29,27,44,32,42,41,56,52,63,63,68,70,83,93,88,83,87,83,105,105,127,98,100,73,77,60,81,71,63,68,65,50,53,59,91,86,86,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,20,20,20,20,20,20,20,20,20,0,0,0,1,0,32,32,17,17,32,18,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,55,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. a4 Ngf6 5. Nc3 g6 6. a5 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7.} a6 7. Be2 Bg7 8. O-O {White is slightly better.} O-O 9. d3 b5 10. axb6 $1 Bb7 11. Nd2 Nxb6 {[#]} 12. Nb3 $146 ({Predecessor:} 12. f4 a5 13. Qe1 a4 14. Qh4 Nfd7 15. Ra3 e6 16. Qh3 f5 17. Nf3 Qe7 18. Re1 {1-0 (76) Zakrzewski,M (2273)-Gahan,M (2279) Szklarska Poreba 2021}) 12... Qc7 13. Na5 Bc8 14. Bg5 e5 15. Qd2 Be6 16. Bf3 Nfd7 17. b3 Rae8 18. Nc4 Nb8 19. h3 Kh8 20. Bg4 f5 21. exf5 gxf5 22. Bh5 Bf7 23. Bxf7 Rxf7 24. f4 Rg8 25. Kh1 h6 {[#]} 26. Bh4 Kh7 27. Rf2 (27. fxe5 $16 Nxc4 28. bxc4 (28. dxc4 Bxe5 29. Nd5 Qb7 $16) 28... Bxe5 29. Nd5) 27... exf4 $1 $11 28. Re1 (28. Rxf4 $2 d5 $17) 28... Bd4 29. Nxb6 Qxb6 ({But not} 29... Bxf2 $6 30. Qxf2 Qxb6 31. Nd5 $16) 30. Nd5 Qb7 31. c4 Bxf2 32. Qxf2 Nc6 {[#] Hoping for ...Ne5.} 33. Nf6+ Rxf6 $1 34. Bxf6 Rg6 35. Ba1 Nd4 36. Bxd4 cxd4 {[%mdl 4096] Endgame KQR-KQR} 37. Kh2 Rg3 38. Re6 Re3 $1 {[%cal Re3e6]} 39. Rxd6 f3 {Strongly threatening ...Re2.} 40. Qg3 {Threatening mate with Qg6+!} (40. Rxd4 $2 Re2 $19) 40... Qg7 41. Qxg7+ ({Not} 41. Rxa6 $2 f2 $19) 41... Kxg7 42. gxf3 ({Don't go for} 42. Rxa6 $2 f2 $19) 42... Rxd3 {KR-KR} 43. Kg3 Rxb3 44. Rxd4 a5 45. Rd7+ Kf6 46. Rd6+ Kg7 47. Ra6 Rc3 48. Rxa5 {Rc5 is the strong threat.} Rxc4 49. Rxf5 Kg6 50. Re5 Ra4 51. h4 Rb4 52. Ra5 Rc4 53. Ra6+ Kh5 54. Rb6 Ra4 55. Re6 Rb4 56. Re4 Rb5 57. Re3 Ra5 58. f4 (58. Rd3 $14) 58... Kg6 {The position is equal.} 59. Kg4 {next Re6+ is good for White.} h5+ 60. Kf3 Kf5 61. Rb3 Rc5 62. Re3 Ra5 63. Rb3 Rc5 64. Re3 Ra5 {Weighted Error Value: White=0.04/Black=0.05} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.08"]
[Round "3.6"]
[White "Xiong, Jeffery"]
[Black "Sevian, Samuel"]
[Result "0-1"]
[ECO "E03"]
[WhiteElo "2700"]
[BlackElo "2654"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,90,0,0,0,0,0,0,0,0,-2,-2,-2,0,33,29,47,30,52,54,76,12,6,5,11,0,23,-11,2,0,13,-4,-8,-35,-39,-37,-18,-25,0,0,0,0,0,0,0,0,4,3,10,0,0,0,7,0,0,0,0,-95,-93,-85,-82,-85,-89,-92,-89,-81,-87,-181,-186,-215,-217,-265,-275,-258,-157,-176,-175,-435,-427,-643,-636,-1047,-1032]} 1. d4 Nf6 2. c4 e6 3. g3 d5 4. Bg2 dxc4 5. Qa4+ Nbd7 6. Qxc4 c5 {E03: Open Catalan: 5 Qa4+ Nbd7 6 Qxc4.} 7. Nf3 a6 8. Qb3 cxd4 {The position is equal.} 9. Nxd4 Nc5 10. Qe3 Nd5 11. Qd2 {[#]} Be7 $146 ({Predecessor:} 11... b5 12. Nc3 Bb7 13. Nxd5 Bxd5 14. Nc6 Qd6 15. Bxd5 exd5 16. Nd4 Ne4 17. Qd3 Qb4+ {½-½ (53) Donchenko,A (2644)-Narayanan,S (2529) Sitges 2019}) 12. O-O O-O 13. Rd1 Qb6 14. Nc3 Nf6 15. Qe3 (15. Qf4 $16) 15... Rd8 $11 16. h3 Bd7 17. b3 Bf8 18. Bb2 Be8 19. Rac1 Rd7 20. Nb1 Nd5 21. Qf3 Nb4 22. Nc3 Rad8 23. Qe3 Rd6 24. a3 Nc6 25. Nxc6 Rxd1+ 26. Nxd1 Bxc6 27. b4 Bxg2 28. Kxg2 Na4 29. Qxb6 Nxb6 30. Ne3 Rd7 31. Nc4 Na4 32. Ne5 Rd2 33. Ba1 (33. Bc3 $11 {keeps the balance.} Rxe2 34. Nd7 Nxc3 35. Rxc3) 33... f6 $17 ({Weaker is} 33... Rxe2 34. Nd7 $14) 34. Nd3 {[#]} e5 $1 35. Kf1 Ra2 36. Bc3 Rxa3 37. Bd2 Bd6 38. b5 (38. f3 $17) 38... axb5 $19 39. Rb1 e4 40. Nf4 Ra2 41. Be1 b4 {[%cal Bb5b4,Bb4b3][%mdl 32]} 42. Nd5 Rb2 43. Rd1 {[#]} (43. Rxb2 Nxb2 44. Bxb4 Bxb4 45. Nxb4) 43... b5 {Black is clearly winning.} 44. Rd4 (44. Nxf6+ $142 gxf6 45. Rxd6) 44... b3 {aiming for ...Rb1.} 45. Nc3 Nxc3 {Weighted Error Value: White=0.39/Black=0.07} 0-1

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.09"]
[Round "4.1"]
[White "Burke, John M"]
[Black "Bruzon Batista, Lazaro"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2554"]
[BlackElo "2645"]
[Annotator "TA"]
[PlyCount "102"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,102,0,0,19,19,16,0,21,8,24,25,48,44,60,33,50,22,25,26,33,-2,-2,-10,0,0,0,0,-6,0,0,0,0,4,4,5,5,4,0,0,5,0,4,0,0,0,0,0,11,2,12,8,8,6,4,4,14,6,22,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. c3 O-O 6. O-O d6 7. Nbd2 a6 8. Ba4 Ba7 9. h3 Ne7 10. d4 Ng6 11. Bc2 Re8 12. Re1 Bd7 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 13. Nf1 {[%cal Bd2f1,Bf1g3,Bg3f5,Bf5d6][%mdl 32]} c5 14. dxc5 dxc5 15. Bg5 Be6 {[#]} 16. Ng3 $146 ({Predecessor:} 16. Ne3 c4 17. Qe2 Bxe3 18. Bxe3 h6 19. Nd2 b5 20. a4 Qe7 21. Ra2 b4 22. Nxc4 bxc3 23. bxc3 {1-0 (54) Dominguez Perez,L (2763)-Wang,H (2726) Khanty Mansiysk 2019}) 16... Qxd1 17. Rexd1 Kf8 18. Nf5 c4 19. Rd2 Red8 20. Nd6 Rdb8 21. Rad1 (21. Bxf6 $5 gxf6 22. Nh2 $14) 21... Ne8 {The position is equal.} 22. Nf5 f6 23. Be3 b5 24. h4 Bxe3 25. Nxe3 Nh8 26. Nh2 Nf7 27. Nhf1 Rd8 28. Nd5 Bxd5 29. Rxd5 Rxd5 30. Rxd5 Nc7 31. Rd7 Ne6 32. Ne3 Ke8 33. Rd1 Rd8 34. Nd5 Nd6 35. a4 Rd7 36. axb5 axb5 37. Ra1 Kf7 38. f3 Nf4 39. Ne3 Nc8 40. Ra5 Rd2 {[#] And now ...Re2 would win.} 41. Rxb5 Re2 42. Rb7+ $1 Kg6 43. Nf5 Rxg2+ ({Stronger than} 43... Rxc2 44. Rxg7+ Kh5 45. g4#) 44. Kh1 Rxc2 45. Rxg7+ Kh5 46. Rxh7+ Kg6 47. Rg7+ Kh5 48. Rh7+ Kg6 49. Rg7+ Kh5 50. Rh7+ Kg6 51. Rg7+ Kh5 {Weighted Error Value: White=0.04/Black=0.04} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.09"]
[Round "4.2"]
[White "Robson, Ray"]
[Black "Xiong, Jeffery"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "2669"]
[BlackElo "2700"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,55,35,43,41,43,31,29,20,26,23,30,27,28,25,10,18,70,72,85,75,72,66,50,42,61,77,66,75,82,74,71,75,78,76,97,88,139,136,127,94,503,502,448,427,29975,29976,29976,29971]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e5 4. O-O Bd6 5. c3 a6 6. Ba4 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} b5 7. Bc2 Nge7 8. a4 {And now axb5 would win.White has an edge.} b4 9. Re1 {[#]} Ng6 $146 ({Predecessor:} 9... Qc7 10. d3 O-O 11. Nbd2 a5 12. Nc4 Ba6 13. Ne3 Nd8 14. Bb3 Ne6 15. Nd5 Nxd5 16. Bxd5 {0-1 (44) Heinemann,J (2257)-Khukhashvili,S (2342) Antalya 2019}) 10. d4 bxc3 11. dxe5 cxb2 12. Bxb2 Bxe5 ({Black should play} 12... Bc7 $1 $11) 13. Nxe5 Ngxe5 14. Bxe5 Nxe5 15. Qd5 {[%mdl 64] [#] Double Attack} Nc6 16. Qxc5 Qe7 17. Qxe7+ Kxe7 18. Nc3 $36 {[%mdl 2048] White has strong initiative.} Nb4 19. Nd5+ Nxd5 20. exd5+ Kd8 21. d6 a5 22. Bd3 Rb8 (22... Ba6 $142 23. Bxa6 Rxa6) 23. Rab1 $16 Rb7 24. Rec1 Rb4 $2 {[%mdl 8192] [#] This costs Black the game.} (24... Rxb1 $16 25. Rxb1 Re8) 25. Rxb4 $1 $18 axb4 26. a5 {[%cal Ba4a5,Ba5a6,Ba6a7][%mdl 32] Hoping for a6.} Bb7 (26... Re8 $18 27. a6 Re5) 27. a6 Ba8 28. a7 {Weighted Error Value: White=0.03/Black=0.86} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.09"]
[Round "4.3"]
[White "So, Wesley"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "2778"]
[BlackElo "2800"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,52,13,6,12,8,14,0,0,0,0,0,0,0,0,0,10,0,0,0,0,0,0,-13,0,-20,91,89,185,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. a3 Bxc3+ 6. Qxc3 d6 {6...d5 is the modern continuation.} 7. Nf3 Re8 {E32: Nimzo-Indian: Classical (4 Qc2): 4...0-0.} 8. b4 a5 9. Bb2 axb4 10. axb4 Rxa1+ 11. Bxa1 {[#]} b5 $146 ({Predecessor:} 11... c6 12. e3 Na6 13. Qa3 Qb6 14. Bc3 e5 15. b5 exd4 16. Bxd4 Nc5 17. Be2 Nfe4 {½-½ (58) Stephan,J (2546)-Ninov,N (2600) ICCF email 2009}) 12. cxb5 Nbd7 13. e3 Nb6 14. Bd3 Bb7 15. O-O Bxf3 16. gxf3 Nfd5 17. Qb3 Qh4 18. Kg2 e5 (18... f5 $11 {keeps the balance.}) 19. dxe5 $16 Re6 {[#]} (19... dxe5 $16 20. Be4 Nf6) 20. exd6 $2 (20. Rd1 $1 $18) 20... Qg5+ $1 $11 {The position is equal.} ({Wrong is} 20... Rh6 $2 21. Be5 $18) 21. Kh1 Qh5 $36 {[%mdl 2048] ( -> ...Rh6). White is under pressure.} 22. Qb2 {[%csl Ga1][%cal Rb2g7]} Qxf3+ 23. Kg1 {[%csl Ga1][%cal Rb2g7]} Qg4+ 24. Kh1 Qf3+ 25. Kg1 {[%csl Ga1][%cal Rb2g7] [#]} Qg4+ 26. Kh1 Qf3+ {Weighted Error Value: White=0.22/Black=0.15} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.09"]
[Round "4.4"]
[White "Sevian, Samuel"]
[Black "Swiercz, Dariusz"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2654"]
[BlackElo "2647"]
[Annotator "TA"]
[PlyCount "219"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,218,11,6,7,10,-4,20,14,10,10,12,12,13,11,8,7,15,0,25,15,20,17,17,17,14,0,0,0,0,0,0,0,36,24,38,13,19,15,12,0,0,0,0,0,0,-23,-54,-43,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,9,9,9,9,9,9,28,28,28,9,9,9,9,9,9,9,28,9,9,9,9,9,27,27,28,9,28,28,28,28,28,28,28,28,28,28,28,0,0,0,28,0,28,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 e6 2. Nc3 d5 3. d4 Be7 4. Nf3 Nf6 5. Bf4 O-O 6. e3 Nbd7 7. cxd5 Nxd5 8. Nxd5 {D37: Queen's Gambit Declined: 5 Bf4.} exd5 9. Be2 Bb4+ 10. Nd2 Nf6 11. a3 Bd6 {[#]} 12. Bxd6 $146 ({Predecessor:} 12. Bg5 Bf5 13. O-O c6 14. b4 a5 15. b5 a4 16. Nf3 Qe7 17. Bd3 Qe6 18. Bxf6 Qxf6 {½-½ (37) Tan,Z (2487)-Khotenashvili,B (2513) Chengdu 2015}) 12... Qxd6 13. Bd3 a5 14. Qc2 Be6 15. O-O h6 16. Rfc1 Rfc8 17. Qc3 b6 18. b4 c6 19. bxa5 Rxa5 20. Qb4 Qc7 21. Nb3 Raa8 22. a4 Ng4 23. g3 h5 24. a5 bxa5 25. Nxa5 ({Don't go for} 25. Rxa5 $2 Rab8 $19) 25... h4 26. Qe1 hxg3 27. hxg3 Qd8 28. Kg2 Qg5 29. Qe2 c5 $1 30. Rh1 cxd4 31. exd4 g6 32. Nb3 Rxa1 33. Rxa1 Kg7 {[#] Strongly threatening ...Rh8.} 34. Nc5 Bf5 35. Rh1 Bxd3 36. Nxd3 Qf5 37. Rh4 Nf6 38. Rf4 Qe6 39. Qxe6 fxe6 $11 {[%mdl 4096] Endgame KRN-KRN} 40. Nc5 Rc6 41. Rf3 Ne4 42. Nxe4 dxe4 {KR-KR} 43. Rf4 Rc4 44. Rxe4 e5 45. Rxe5 {[#] Threatens to win with d5.} Rxd4 46. Kf3 Kf6 47. Re4 Rd2 48. Ra4 Rb2 49. Ke3 Rc2 50. f3 Rc6 51. Ke4 Re6+ 52. Kf4 Rb6 53. Kg4 Rc6 54. Kh4 Rc3 55. f4 Rc5 56. g4 Kg7 57. Ra7+ Kf8 58. Rd7 Ra5 59. Rb7 Rc5 60. Kg3 Rc3+ 61. Kf2 Ra3 (61... Rc2+ {is interesting.} 62. Kg3 Rc3+) 62. Rd7 Rb3 63. Ke2 Rg3 {The position is equal.} 64. g5 Ra3 65. Rd3 Ra4 66. Ke3 Ke7 67. Rb3 (67. f5 $5) 67... Rc4 68. Rb6 Kf7 69. Rb7+ (69. f5 {looks sharper.} gxf5 70. Rf6+ Kg7 71. Kf3 Rg4 72. Ra6) 69... Kf8 70. Rd7 Ra4 71. Rd4 Ra1 72. Rc4 Re1+ 73. Kd4 Kf7 74. Rc7+ Kf8 75. Ra7 Kg8 76. Kd5 (76. f5 $5 gxf5 77. Kd5 $11) 76... Kf8 77. Ra6 Kf7 78. Rf6+ (78. f5 $5 gxf5 79. Rh6 $11) 78... Kg7 79. Rb6 Rd1+ 80. Ke4 Re1+ 81. Kd3 $1 Rd1+ 82. Ke2 Ra1 83. Rb7+ Kf8 84. Rd7 Ra3 85. Rd3 Ra1 86. Rb3 Kf7 87. Ke3 Ra4 88. Rb7+ Kf8 89. Rd7 Kg8 90. Rd4 (90. f5 {keeps more tension.} gxf5 91. g6 Rg4 92. Ra7 Kf8 93. Rf7+) 90... Ra1 91. Ke4 Re1+ 92. Kd5 Kf7 93. Kd6 (93. Rb4 {is interesting.} Kf8 94. Rb6 Kg7 95. Rb7+ Kg8 96. Ra7) 93... Re6+ 94. Kc7 Re7+ 95. Kc6 {And now Rd7 would win.} Re6+ 96. Kc5 (96. Rd6 Ke7 $19) 96... Re2 97. Rd7+ Kf8 98. Kd5 Re1 99. Rc7 Kg8 100. Rc4 Kf7 101. Re4 Rd1+ (101... Ra1 {is more complex.} 102. Kd6 Rd1+ 103. Ke5 Rd7 104. Rb4 Re7+) 102. Ke5 (102. Kc4 {seems wilder.} Rc1+ 103. Kd4 Rb1 104. Ke3 Re1+ 105. Kd3) 102... Rd8 103. f5 {Black should prevent f6.} (103. Ra4 {with more complications.} Re8+ 104. Kd4 Re7 105. Kd5 Re1 106. Re4) 103... Re8+ 104. Kf4 Rxe4+ 105. Kxe4 {f6 would kill now.} gxf5+ 106. Kxf5 {KP-K} Kg7 107. g6 Kg8 108. Kf6 {Intending g7 and mate.} Kf8 109. g7+ Kg8 110. Kg6 {Weighted Error Value: White=0.04/Black=0.04} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.09"]
[Round "4.5"]
[White "Shankland, Sam"]
[Black "Dominguez Perez, Leinier"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2714"]
[BlackElo "2760"]
[Annotator "TA"]
[PlyCount "110"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,110,-2,5,11,9,11,18,0,0,0,8,0,0,5,9,9,17,17,17,16,21,26,27,28,22,24,14,25,41,0,0,-6,0,-10,-8,0,0,-8,-3,-3,-3,-3,-3,-8,-8,-8,-7,-4,-4,-8,-8,-15,-4,0,0,-8,-8,-8,-8,-8,-8,-8,-8,-143,-143,-143,-143,-143,-143,-143,-143,-151,-151,-272,-260,-445,-445,-660,-586,-1063,-3898,-2977,-2262,-845,-1803,-5706,-5289,-2804,-1510,-1737,-1768,-1486,-1411,-1326,-1057,-956,-557,-2663,-2651,-29976,-29978,-29971,-29970]} 1. d4 d5 2. Nf3 Nf6 3. Bf4 e6 4. e3 c5 5. c3 Bd6 6. Bb5+ {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Nc6 7. Bxc6+ {now scores much better than the old 7.Ne5.} bxc6 8. Bxd6 {The position is equal.} Qxd6 9. Qa4 O-O 10. Nbd2 cxd4 11. cxd4 c5 {[#]} 12. O-O $146 ({Predecessor:} 12. Qa3 Nd7 13. Rc1 Rb8 14. dxc5 Qc7 15. O-O a5 16. Nb3 Ba6 17. Rfd1 {0-1 (56) Rusev,K (2570)-Steinbuerg,K (2499) Chess.com INT 2017}) 12... Qa6 13. Qxa6 Bxa6 14. Rfc1 cxd4 15. Nxd4 Rab8 16. b3 Rfc8 17. N2f3 Kf8 18. Ne5 Ke8 19. f4 Ne4 20. a4 Rxc1+ 21. Rxc1 Rc8 22. Rxc8+ Bxc8 $11 {[%mdl 4096] Endgame KBN-KNN} 23. b4 f6 24. Nec6 a6 25. Na7 Bd7 26. b5 axb5 27. axb5 Ke7 28. b6 {aiming for b7.} Nc5 29. Nac6+ Bxc6 30. Nxc6+ {KN-KN} Kd6 31. Nd4 g6 32. Kf2 e5 33. fxe5+ fxe5 34. Nf3 Nd7 35. Ng5 h5 36. Nf7+ {White is now going downhill.} (36. b7 $11 {keeps the balance.}) 36... Ke7 $17 37. Ng5 Nxb6 38. e4 d4 39. Ke2 Nd7 40. Kd3 Nc5+ 41. Kc4 {[#]} (41. Ke2 $17) 41... Ne6 $1 $19 {[%cal Re6g5]} 42. Nf3 (42. Nh3 {was the only chance.}) 42... Kd6 43. g3 {[#]} (43. Nd2 $142 g5 44. Kb4) 43... g5 $1 {[%cal Rg5g4]} 44. h4 g4 45. Nd2 Nc5 46. Kb5 Nd3 47. Kc4 Nf2 48. Kb4 Kd7 49. Kc4 Nh1 50. Nf1 Kc6 51. Kb4 Kb6 52. Kc4 Ka5 53. Kd5 {[#]} Nxg3 $1 {[%mdl 512]} 54. Nd2 (54. Nxg3 d3) 54... Kb4 55. Nc4 Kc3 {Weighted Error Value: White=0.58/Black=0.15} 0-1

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.09"]
[Round "4.6"]
[White "Naroditsky, Daniel"]
[Black "Lenderman, Aleksandr"]
[Result "0-1"]
[ECO "D04"]
[WhiteElo "2623"]
[BlackElo "2607"]
[Annotator "TA"]
[PlyCount "148"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,148,0,0,6,10,2,0,4,2,0,0,0,8,0,-7,-15,-8,-47,-47,-40,-38,-39,-40,-50,-40,-55,-28,-33,-31,-26,-18,-39,-32,-35,-15,-12,-4,-17,-4,-31,0,0,-5,-37,-38,-38,-42,-30,-31,-83,-77,-68,-72,-63,-63,-108,-90,-75,-75,-140,-113,-146,-155,-138,-123,-156,-146,-221,-227,-254,-253,-259,-245,-290,-219,-266,-249,-264,-226,-219,-208,-294,-281,-339,-294,-300,-223,-289,-296,-392,-384,-384,-384,-384,-384,-384,-362,-364,-356,-365,-366,-354,-341,-535,-514,-578,-581,-574,-574,-583,-557,-556,-558,-539,-522,-471,-374,-825,-872,-6053,-6016,-29962,-29964,-29961,-29965,-29968,-29965,-29963,-29962,-29969,-29969,-29969,-29970,-29970,-29971,-29970,-29971,-29970,-29970,-12830,-4627]} 1. d4 Nf6 2. Nf3 d5 3. e3 c5 4. Nbd2 cxd4 5. exd4 Qc7 6. Bd3 {D04: Colle System.} Nc6 7. c3 Bg4 8. Qa4 {The position is equal.} Bd7 $5 {[%mdl 4] Exploring less charted territory.} 9. Qc2 Rc8 10. a3 {[#]} Bg4 $146 ({Predecessor:} 10... g6 11. O-O Bg7 12. Re1 O-O 13. Nb3 Nh5 14. Qd2 b6 15. Qe3 e5 16. dxe5 Rce8 {0-1 (22) Alieva,A (1864)-Ushakova,I (2162) Samara 2009}) 11. Qa4 e6 12. Ne5 Bh5 13. Nf1 Bd6 14. f4 Bg6 {[%cal Rd6e5]} 15. Be2 Be4 16. Ne3 O-O 17. O-O Nd7 18. Qd1 f6 {[%cal Rd7e5]} 19. Nxd7 Qxd7 20. Bd3 Bxd3 21. Qxd3 f5 22. Bd2 Ne7 23. b3 Rcd8 24. Rad1 Bc7 (24... Bxa3 $2 25. b4 $18) 25. Be1 Ng6 26. Bg3 Bd6 27. Rf3 Qc7 {[%cal Rg6f4]} (27... Bxa3 28. b4 $14) 28. Rdf1 h5 29. h3 ({Better is} 29. h4 $15) 29... h4 $17 30. Bh2 Bxa3 31. b4 Rc8 $1 $36 {[%mdl 2048] Black fights for an advantage.} 32. Nd1 a5 33. bxa5 Qxa5 34. Re3 (34. Kh1 $142) 34... Rf6 35. Rfe1 Rc6 36. Kh1 Bf8 37. g3 hxg3 38. Rxg3 (38. Bxg3 $17 {is a better defense.} Qc7 39. Qf1) 38... Ne7 $19 {[%cal Bg6e7,Be7c8,Bc8d6][%mdl 32]} (38... Nxf4 39. Qf3 $17) 39. Reg1 Nc8 40. Qf3 Nd6 41. Qh5 Qd8 42. R3g2 Qe7 43. Bg3 Qf7 (43... Rh6 44. Qxh6 gxh6 45. Bh4+ Qg7 46. Rxg7+ Bxg7 47. Bf6 $17) 44. Qf3 Rh6 45. h4 (45. Be1 $142) 45... Be7 46. Be1 Bf6 47. Nb2 Qh5 48. Qh3 Ne4 49. Nd3 Rc7 50. Ne5 Bxh4 51. Rh2 {[%cal Rh3h4]} Bxe1 52. Qxh5 Rxh5 53. Rxh5 Ng3+ ({Less strong is} 53... Rxc3 54. Kg2 $19) ({Weaker is} 53... Bxc3 54. Nf3 $19) 54. Rxg3 Bxg3 {[%mdl 4096] Endgame KRB-KRN} 55. Ng6 Kf7 ({Much less strong is} 55... Rxc3 56. Kg2 $19) 56. Ne5+ (56. Rg5 $142 Be1 57. Ne5+ Kf8 58. Rg6) 56... Kf6 57. Rg5 Bxf4 58. Rg6+ Ke7 59. Rxg7+ Kd6 60. Nf7+ Kc6 61. Nd8+ Kb5 62. Rg6 e5 63. dxe5 $2 {[#]} (63. Kg2) 63... Bxe5 64. Rg5 Bf6 65. Rxf5 Bxd8 66. Rxd5+ Kc4 67. Rxd8 Kxc3 {KR-KR} 68. Rd5 Rg7 69. Rh5 Kb4 70. Rh4+ Ka5 71. Rh2 b5 72. Ra2+ Kb4 73. Rb2+ Kc4 74. Rc2+ Kb3 {Weighted Error Value: White=0.20/Black=0.08} (74... Kd3 $142 75. Rb2 Kc4 76. Rc2+ Kb3) 0-1

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.11"]
[Round "5.1"]
[White "Caruana, Fabiano"]
[Black "Naroditsky, Daniel"]
[Result "0-1"]
[ECO "C79"]
[WhiteElo "2800"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,114,37,37,22,16,24,18,22,22,21,16,13,19,11,16,0,9,-16,4,0,3,11,32,25,33,14,19,10,25,0,0,0,0,0,0,5,12,0,0,0,0,0,0,-5,-9,-17,-12,-12,-16,-22,0,-4,-4,-81,-82,-73,-89,-292,-257,-291,-291,-292,-287,-287,-287,-277,-279,-285,-285,-313,-313,-313,-308,-694,-693,-659,-642,-631,-574,-935,-896,-1285,-1045,-29970,-29971,-29970,-29972,-29965,-29969,-29971,-29974,-29975,-29976,-29978,-29979,-29981,-29982,-29982,-29983,-29983,-29981]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O Bd7 6. c3 Nf6 7. Re1 g6 $1 {[%mdl 4] is now more promising than 7...Be7.} 8. d4 Bg7 9. Nbd2 {C79: Ruy Lopez: Steinitz-type lines with 3...a6 4 Ba4 Nf6 5 0-0 d6.} exd4 $5 {[%mdl 4] A promising side line.} 10. cxd4 O-O $1 11. h3 {The position is equal.} Nb4 12. Bxd7 Qxd7 13. Qb3 a5 {[%cal Ba6a5,Ba5a4][%mdl 32]} 14. a3 Nc6 {[%cal Bb4c6,Bc6a5,Ba5b3][%mdl 32]} 15. Nf1 (15. Qxb7 $2 Rfb8 $19) 15... a4 16. Qd3 Na5 {[#]} 17. Bg5 $146 ({Predecessor:} 17. Bf4 b5 18. Rad1 Nc4 19. Qc2 c6 20. Ng3 Rfc8 21. Qc1 Qd8 22. Re2 Qf8 23. h4 {½-½ (32) Bruzon Batista,L (2689)-Short,N (2688) Ottawa 2013}) 17... Nb3 18. Rad1 h6 19. Bxf6 Bxf6 20. N1d2 {[%cal Bf1d2,Bd2b1,Bb1c3][%mdl 32]} Na5 21. Nb1 b5 22. Qc2 Bg7 23. Nc3 c6 24. e5 Rfe8 25. Ne4 Nc4 26. exd6 Nxd6 27. Ne5 Qf5 28. g4 (28. Qxc6 Nxe4 29. Rxe4 f6 $17) 28... Qe6 {Threatens to win with ...Nxe4.} 29. Nc3 ({Don't play} 29. Qxc6 Nxe4 30. Qxe6 (30. Qxe4 f6 $19) 30... Rxe6 $17) 29... Rac8 30. Re2 Qb3 31. Qxb3 axb3 32. Kg2 c5 33. dxc5 Nc4 34. Nxc4 (34. Nd3 $1 $11 Rxe2 35. Nxe2) 34... Rxe2 $17 35. Nxe2 {aiming for Na5.} bxc4 $11 {[%mdl 4096] Endgame KRB-KRN} 36. Rc1 $2 {Now White is beyond hope.} (36. Nc3 $17) 36... Bxb2 $19 37. Rxc4 Bxa3 38. c6 b2 39. Nc3 Bf8 40. Nb1 {[#]} Bg7 $1 41. Kf3 {[#]} Kf8 $1 42. h4 Ke7 43. h5 Kd6 44. hxg6 $2 (44. Rf4 gxh5 45. gxh5) 44... fxg6 45. Rb4 Rxc6 46. Rb7 Be5 47. Nd2 Rc2 48. Ke3 Kc6 49. Rb3 Rc3+ {Black mates.} 50. Rxc3+ Bxc3 {KB-KN} 51. Nb1 Bb4 52. f4 Kd5 53. Kd3 h5 54. f5 hxg4 55. fxg6 Ke6 56. Ke4 g3 ({And not} 56... Kf6 57. Kf4 $11) 57. Kf3 Bd6 {Weighted Error Value: White=0.40/Black=0.02} 0-1

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.11"]
[Round "5.2"]
[White "Dominguez Perez, Leinier"]
[Black "Burke, John M"]
[Result "1/2-1/2"]
[ECO "C89"]
[WhiteElo "2760"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 26,83,19,5,31,44,29,35,36,30,40,20,26,10,10,4,7,0,5,0,0,0,0,0,0,0,0,0,0,0,0,-4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10. Nxe5 Nxe5 11. Rxe5 c6 12. d3 Bd6 13. Re1 Bf5 14. Qf3 Qh4 {C89: Closed Ruy Lopez: Marshall Attack.} 15. g3 ({Of course not} 15. Bxd5 Bxh2+ 16. Kf1 Bg4 $17) 15... Qh3 16. Be3 Bxd3 {White is slightly better.} ({But not} 16... Nxe3 17. Rxe3 Rac8 18. Nd2 $16) 17. Nd2 Bf5 18. Bd4 Rfd8 {[#]} 19. a4 $146 {[#] Threatens to win with axb5.} ({Predecessor:} 19. Ne4 Bf8 20. Ng5 Qg4 21. Qxg4 Bxg4 22. f3 Bh5 23. Kg2 c5 24. Bf2 h6 25. Nh3 {½-½ (56) Wang,J (2459)-Harutyunian,T (2542) Saint Louis 2019}) 19... Bg4 {The position is equal.} 20. Qe4 {Strongly threatening axb5.} Rac8 21. Nf3 {White wants to play axb5.} Bf5 {[#]} 22. Ng5 Bxe4 {[%csl Ge4][%cal Rh3g2]} 23. Nxh3 Bf5 24. Ng5 Bf8 25. axb5 axb5 26. Ra7 Bg6 27. Rb7 c5 28. Rxb5 cxd4 29. Rxd5 Rxd5 30. Bxd5 dxc3 31. bxc3 Rxc3 32. Be4 h6 33. Bxg6 hxg5 $11 {[%mdl 4096] Endgame KRB-KRB} 34. Be4 g6 35. Re2 Kg7 36. Rc2 Rxc2 37. Bxc2 {KB-KB} Bc5 38. Kg2 Bb6 39. Bd3 Bc5 40. Bc2 Bb6 41. Bd3 Bc5 42. Bc2 {Weighted Error Value: White=0.03/Black=0.02} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.11"]
[Round "5.3"]
[White "Swiercz, Dariusz"]
[Black "Robson, Ray"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2647"]
[BlackElo "2669"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,84,16,15,12,11,25,0,21,22,15,16,22,17,12,16,14,27,29,30,28,34,28,26,26,26,28,27,46,25,27,40,16,8,8,8,8,8,8,8,5,9,15,0,0,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 O-O 6. O-O d6 7. Re1 h6 8. h3 a6 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 9. a4 $1 {[%mdl 4] outshines the older 9.Bb3.} Ba7 10. b4 Re8 11. Nbd2 Be6 12. Bxe6 Rxe6 13. Qc2 Qd7 14. Nf1 d5 15. Be3 d4 16. cxd4 Nxd4 17. Nxd4 Bxd4 18. Bxd4 Qxd4 19. Qxc7 Qxd3 20. Qxb7 {[#]} Ree8 $146 ({Predecessor:} 20... Qd8 21. Red1 Qb8 22. Qxb8+ Rxb8 23. f3 Rxb4 24. Ne3 g6 25. a5 Kg7 26. Rdb1 Rxb1+ 27. Rxb1 {½-½ (55) Grischuk,A (2777)-Rapport,R (2759) Chess.com INT 2020}) 21. Red1 Qxe4 22. Qxe4 Nxe4 23. Rac1 {The position is equal.} Rec8 24. Rxc8+ Rxc8 $11 {[%mdl 4096] Endgame KRN-KRN} 25. Ne3 Nc3 26. Rd6 Nxa4 27. Rxa6 Nc3 28. Ra5 Rb8 29. Rc5 Na4 30. Rxe5 Rxb4 31. g4 Nc3 32. Kg2 Ne4 33. Nd5 Ra4 34. Nb6 Rd4 35. Re8+ Kh7 36. Nd7 {[#] Threatens to win with Nf8+.} Rxd7 37. Rxe4 {KR-KR} g5 38. Ra4 Rd3 39. Re4 Kg7 40. Ra4 Kh7 41. Re4 Kg7 42. Ra4 Kh7 {Weighted Error Value: White=0.02/Black=0.02} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.11"]
[Round "5.4"]
[White "Bruzon Batista, Lazaro"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2645"]
[BlackElo "2778"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,59,18,16,4,18,0,0,-14,0,-2,0,0,0,-8,38,38,38,34,31,34,46,13,27,26,18,11,11,11,18,6,3,3,3,0,6,2,8,4,23,9,35,0,0,0,14,12,14,0,11,0,12,0]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nd3 Nxe4 5. Qe2 Qe7 6. Nf4 {[#] Strongly threatening Nd5. C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} Nc6 {Hoping for ...Nd4. is cutting edge theory.} 7. c3 Nf6 8. d4 g5 (8... Bf5 {with more complications.} 9. Qxe7+ Nxe7 10. Be2 h5 11. h4 g6) 9. Qxe7+ {[#]} Nxe7 $146 ({Predecessor:} 9... Bxe7 10. Ne2 Nd5 11. Ng3 h5 12. Bd3 h4 13. Ne2 f5 14. Nd2 f4 15. h3 O-O {½-½ (61) Harikrishna,P (2724)-Bai,J (2600) China 2019}) 10. Ne2 h6 11. Ng3 Nf5 (11... Be6 {keeps more tension.} 12. Bd3 O-O-O 13. h4 gxh4 14. Rxh4 Nfd5) 12. Bd3 Nxg3 13. hxg3 Bg7 14. Na3 Be6 15. Nc4 Nd5 16. Ne3 c5 17. Be4 Nxe3 18. Bxe3 d5 {[#] Threatens to win with ...cxd4.} 19. Bc2 cxd4 20. Bxd4 Bxd4 21. cxd4 Rc8 22. Bd3 Ke7 23. Kd2 Rc6 24. b3 a5 25. Rac1 (25. Rae1 {is interesting.} Rb6 26. Re5 a4 27. Bc2 Rc6 28. f4) 25... Rxc1 {The position is equal.} 26. Rxc1 {White wants to play Rc7+.} Rc8 27. Rh1 Rh8 28. Rc1 Rc8 29. Rh1 Rh8 30. Rc1 {Weighted Error Value: White=0.08/Black=0.07} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.11"]
[Round "5.5"]
[White "Lenderman, Aleksandr"]
[Black "Sevian, Samuel"]
[Result "1-0"]
[ECO "E53"]
[WhiteElo "2607"]
[BlackElo "2654"]
[Annotator "TA"]
[PlyCount "279"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,279,3,0,0,0,4,0,12,18,0,0,20,25,28,39,33,31,35,9,61,59,58,58,64,82,69,82,97,93,68,92,101,100,92,45,86,89,83,84,118,114,123,127,132,122,150,160,157,157,175,156,155,149,164,162,172,164,188,180,195,165,240,236,237,235,235,225,235,225,206,176,203,179,181,165,181,191,194,174,177,0,165,165,183,179,179,165,168,148,196,200,189,174,193,0,204,202,203,210,297,297,290,261,248,210,210,217,356,344,322,0,351,278,363,381,375,381,376,376,370,217,217,217,224,217,250,210,210,0,224,217,217,210,210,210,210,0,210,210,210,210,210,210,210,210,210,210,210,210,210,194,210,210,210,210,210,210,210,210,210,0,210,0,210,137,210,137,202,180,210,210,210,0,229,210,210,210,210,210,294,181,439,181,746,748,566,693,618,602,522,391,351,327,271,210,210,210,210,210,189,189,189,193,202,194,308,456,441,454,448,287,723,693,10906,477,474,474,552,514,544,459,908,909,620,459,459,458,456,448,448,448,425,221,499,485,458,448,915,831,3533,2912,2193,2351,1142,1377,5747,4758,29971,29973,29973,29973,29971,29973,29973,29974,29976,29976,29977,29978,29978,29979,29980,29981,29981,29982,29982,29983,29983,29984]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. e3 O-O 6. Bd3 c5 {6...dxc4 is more fashionable.} 7. cxd5 exd5 {E53: Nimzo-Indian: Rubinstein: Main Line (4...0-0 5 Nf3 d5 6 Bd3 c5 7 0-0).} 8. dxc5 Nbd7 9. Bd2 Nxc5 {The position is equal.} 10. Be2 Ne6 11. Qb3 $5 {[%mdl 4] [#] Exploring less charted territory.} Ba5 $146 ({Predecessor:} 11... Be7 12. O-O Nc5 13. Qc2 Nce4 14. Nxe4 Nxe4 15. Rfd1 Qb6 16. Be1 Rd8 17. a4 Bg4 {½-½ (58) So,W (2772)-Nakamura,H (2736) Saint Louis 2021}) 12. O-O d4 13. exd4 Nxd4 14. Nxd4 Qxd4 15. Rad1 Qb4 ({Black should try} 15... Qe5 $11 16. Qb5 Qxb5 17. Nxb5 Bxd2 18. Rxd2 Be6) 16. Qxb4 $14 Bxb4 17. Bf3 Ba5 18. Bf4 Bxc3 19. bxc3 Bg4 20. Bxb7 {Black must now prevent f3.} Bxd1 21. Bxa8 (21. Rxd1 Rad8 $17) 21... Be2 {[#]} 22. Re1 Bc4 23. Bb7 Bxa2 24. Ra1 Re8 25. Be3 Re7 26. Bf3 Bd5 27. Be2 h6 28. Rxa7 Rxa7 29. Bxa7 $16 {[%mdl 4096] Endgame KBB-KBN} Bb7 30. Bd4 Nd7 31. Bb5 Nf8 32. Bc5 Ne6 33. Bd6 g6 34. f3 Kg7 35. Kf2 h5 36. h4 Bd5 (36... f6 {was worth a try.} 37. Ke3 Bc8) 37. c4 $18 Bb7 38. Ke3 Kf6 39. Bb4 Nd8 40. Bc3+ Ke7 41. Be1 Nc6 42. Bg3 Ke6 43. Bf2 Kf5 44. Ba4 Ke6 45. Be1 Kd6 46. Bb5 $2 ({White should play} 46. Kd2 $18) 46... Ke6 $2 (46... Ke7 $1 $11 {and Black stays safe.}) 47. Kd3 Kd6 48. Bg3+ Ke6 49. Kc3 f6 50. Ba4 Ne7 51. Bf2 Nc6 52. Be3 Ne7 53. Bf2 Nc6 $1 54. Bc2 Ne7 55. Kb4 g5 (55... Bc6 $142 56. Kc5 g5) 56. Kb5 Kd7 57. Kb6 Bc6 58. Kc5 Ke6 59. Be1 Kd7 (59... Ba8 $142 60. Bb1 Bc6) 60. Bg3 Bb7 61. Be1 Bc6 $1 62. hxg5 fxg5 63. Bd2 g4 64. fxg4 hxg4 {[#]} 65. g3 $1 Bf3 66. Bf4 (66. Ba4+ $142 Kc8 67. Bf4) 66... Ke6 67. Bh7 Be2 68. Be4 Bf3 69. Bd3 Nc6 70. Bc2 $2 (70. Bb1 $18) 70... Ne5 $2 (70... Ne7 $1 $11 {and Black is okay.}) 71. Kd4 Nc6+ 72. Kc3 Ne7 73. Bh7 Kf7 74. Bc2 Ke6 75. Bb3 Nc6 76. Ba4 Kf6 77. Bc2 Ke6 78. Be3 Ke5 79. Bh7 Ne7 80. Bd4+ Ke6 81. Bd3 Nc6 82. Bc5 Ne5 83. Bf1 Nc6 84. Be3 Ke5 85. Bd3 Ke6 86. Bc2 Ke5 $1 87. Bh7 Ne7 88. Kb4 Ke6 (88... Nf5 $16 89. Bf4+ Kf6) 89. Kb5 Be2 (89... Nf5 $16 90. Bf4 Be4 91. Bg8+ Kd7) 90. Bf4 Kf7 91. Bc2 Ke6 92. Kc5 $2 (92. Bc7 $18) 92... Nf5 $2 (92... Bf3 $11) 93. Be4 Ne7 94. Bb7 Bf3 95. Ba6 Be2 96. Kb6 Ng6 $2 (96... Kd7 97. Kc5 Bf3 98. Bb5+ Ke6) 97. Bc7 (97. Bc1 $142) 97... Ne5 $2 (97... Kd7 98. Bb8 Ne7) 98. Bc8+ Nd7+ 99. Kc6 Bf3+ 100. Kb5 Be2 101. Bf4 Ke7 {intending ...Bxc4+.} 102. Kc6 Nf6 103. c5 {Strongly threatening Bg5.} Bf3+ 104. Kb5 {aiming for Bg5.} Kd8 105. Bf5 Nd5 106. Bd6 {Threatens to win with c6.} Be2+ 107. Ka5 {Hoping for c6.} Ne3 108. Be4 Nc4+ (108... Bf3 {is a better defense.}) 109. Kb4 Bf3 110. Bd3 ({Not} 110. Kxc4 Bxe4 111. Kb5 Kd7 $14) ({Avoid the trap} 110. Bxf3 $2 gxf3 111. Kxc4 f2 $19) 110... Ne3 111. Kc3 Nd5+ $2 (111... Kd7 112. Kd4 Nd1 113. Bf5+ Kc6) 112. Kd4 Ne7 113. Ke5 (113. Bxe7+ $142 Kxe7 114. Bf5) 113... Nc6+ 114. Kf4 Nd4 115. Ke3 Ne6 116. Bf5 Ng5 (116... Kd7 $142 117. Bd3 Bd1 118. Bb5+ Kd8) 117. Kd4 Nf7 118. Bg6 Ng5 119. Ke5 Kd7 120. Bf5+ Kc6 {If only Black now had time for ...Nf7+....} 121. Kf4 Nh3+ 122. Ke3 Ng1 $2 (122... Ng5 123. Be7 Nh3) 123. Bd3 Bd5 124. Bc2 Nf3 (124... Bf3 $142 125. Ba4+ Kb7) 125. Ba4+ Kb7 126. Bd7 Nh2 127. Kf4 Bf3 128. Kg5 Bd5 129. Bxg4 Nxg4 130. Kxg4 {KB-KB. White mates.} Kc6 131. Kf5 Kd7 132. g4 Be6+ 133. Kg5 Kc6 134. Kh5 Kd7 135. g5 Bc4 136. Kh6 Bb3 137. g6 Bc4 138. Kg7 Bd3 139. Kf7 Bc4+ 140. Kf8 {Weighted Error Value: White=0.12/Black=0.18} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.11"]
[Round "5.6"]
[White "Xiong, Jeffery"]
[Black "Shankland, Sam"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2700"]
[BlackElo "2714"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,75,5,20,-12,13,3,26,0,8,12,45,52,52,40,56,43,41,38,41,31,70,62,70,0,56,66,68,73,101,97,120,120,131,112,120,107,162,156,178,171,186,101,148,150,174,145,173,150,201,210,188,165,154,168,216,218,204,212,215,207,264,233,484,486,497,477,487,479]} 1. Nf3 c5 2. c3 d5 3. d4 e6 4. Bf4 Bd6 5. e3 Nc6 6. Bg3 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Nge7 {is recently more successful than 6...Nf6.} 7. Nbd2 cxd4 8. exd4 {White has an edge.} O-O 9. Bd3 Ng6 10. Qc2 f5 {[#]} 11. Bxd6 $146 ({Predecessor:} 11. O-O-O Nf4 12. Bxf4 Bxf4 13. Kb1 Bxd2 14. Qxd2 a6 15. h3 b5 16. Rhe1 Rb8 17. Ne5 Nxe5 18. Rxe5 {1-0 (31) De Prado Rodriguez,O (2237)-Mateus,D (1778) Famalicao 2015}) 11... Qxd6 12. O-O Bd7 13. Rfe1 Rae8 14. Bb5 Nb8 15. Bf1 Nc6 16. Bb5 Nb8 17. a4 a6 18. Bf1 Nc6 {[%cal Bb8c6,Bc6d8,Bd8f7][%mdl 32]} 19. b4 Nd8 20. b5 axb5 21. axb5 ({Don't do} 21. Bxb5 $6 Nf7 $11) 21... Nf7 22. c4 e5 (22... dxc4 $16 {was necessary.} 23. Nxc4 Qc7) 23. c5 $18 Qf6 {Threatening ...e4.} 24. dxe5 Nfxe5 25. Qa4 ({White should play} 25. Qb3 $18) 25... Nxf3+ 26. Nxf3 Re4 27. Qa7 Bc8 28. Red1 Nf4 (28... Ne5 $16) 29. Rac1 Re7 30. Qb8 g5 31. c6 bxc6 32. Rxc6 Bd7 33. Rxf6 {[%csl Gf6][%cal Rb8f8]} Rxb8 {[#]} 34. Nd4 $1 ({Much less strong is} 34. Nxg5 $6 Kg7 $16) 34... Re5 35. Rd6 Rb7 (35... Be8 36. g3 Ng6) 36. b6 {White is clearly winning.} Re7 37. g3 Ng6 38. Bg2 {Weighted Error Value: White=0.10/Black=0.24} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.12"]
[Round "6.1"]
[White "Shankland, Sam"]
[Black "Burke, John M"]
[Result "1-0"]
[ECO "A30"]
[WhiteElo "2714"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "123"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,123,15,33,8,21,18,17,0,11,5,8,0,4,3,16,13,69,44,61,72,54,71,78,0,0,0,64,0,0,0,0,0,0,0,0,0,0,0,13,13,1,1,19,14,47,45,60,54,53,43,50,43,43,40,56,45,80,61,61,64,82,51,66,66,66,66,66,66,66,66,66,66,66,66,83,66,66,78,83,83,83,83,83,83,94,63,80,88,89,85,192,192,304,275,220,139,524,481,463,410,662,690,386,347,354,335,647,564,1681,1412,29982,29983,29975,29976,29988,29989]} 1. c4 Nf6 2. Nf3 c5 3. b3 Nc6 4. Bb2 d5 5. cxd5 Qxd5 6. Nc3 {[#] A30: Symmetrical English: Double Fianchetto and Hedgehog.} Qf5 $146 ({Predecessor:} 6... Qd7 7. g3 b6 8. Bg2 Bb7 9. O-O e5 10. d3 Bd6 11. Nb5 Bb8 12. Na3 O-O {0-1 (42) Fischer,G (2012)-Wagner,F (2207) Buechenbach/Roth 2011}) 7. e3 e5 8. Nb5 {Hoping for Nc7+.The position is equal.} Rb8 9. d3 a6 $1 {[%cal Ra6b5] [#]} 10. e4 $1 Qh5 $1 11. Na3 Bg4 12. Be2 b5 (12... Bd6 $11) 13. Nc2 $1 $14 Nd4 14. Nfxd4 exd4 15. b4 Rd8 16. h3 (16. Bxg4 $16 Qxg4 17. O-O) 16... Bxe2 $11 17. Qxe2 Qxe2+ 18. Kxe2 Nxe4 $1 19. a4 Nc3+ 20. Bxc3 dxc3 21. bxc5 Bxc5 {And now ...b4 would win.} 22. axb5 axb5 23. Rhb1 O-O {...b4! is the strong threat.} 24. Rxb5 Rfe8+ 25. Kf1 Be7 (25... Bf8 {with more complications.} 26. d4 g6 27. Rb7 Bg7 28. Ra4 Bh6) 26. d4 Kf8 27. Ra7 Ra8 28. Rxa8 Rxa8 $14 {[%mdl 4096] Endgame KRB-KRN} 29. Ke2 Ba3 30. Kd3 Bb2 31. Re5 Rd8 32. Ra5 Rd7 33. Ra4 g6 34. Ne3 Ke7 35. Rc4 Kf6 36. Nd1 Ra7 37. Nxc3 Ra3 38. Kd2 Bxc3+ 39. Rxc3 {KR-KR} Ra2+ 40. Ke3 h5 41. h4 Rb2 42. g3 Ra2 43. Rd3 Ke6 44. Rd2 Ra3+ 45. Ke4 Ra1 46. Kf4 Kf6 47. f3 Rb1 48. Re2 Rd1 49. Re4 Ra1 {[#]} (49... Rd3 $16 {was called for.}) 50. g4 $1 $18 hxg4 (50... Ra5 $142 51. Re5 Ra4) 51. fxg4 ({And not} 51. Kxg4 Rd1 $11) 51... Rf1+ 52. Ke3 {Black must now prevent Rf4+.} Re1+ $2 {[%mdl 8192] [#] This move loses the game for Black.} (52... Rd1 $16 53. Ke2 Rc1) 53. Kd3 $1 Ra1 54. Kc4 Kg7 (54... g5 $142 55. h5 Rc1+ 56. Kd3 Kg7) 55. g5 f5 56. Re7+ Kf8 57. Re6 Ra4+ $2 (57... Rc1+ 58. Kb5 Rb1+ 59. Kc5 Rc1+ 60. Kb5 Rb1+ 61. Kc6 Rc1+ 62. Kd6 Kg7 63. Re7+ Kg8) 58. Kc5 Kg7 59. d5 Rxh4 60. d6 {White mates.} Kf7 {[#]} 61. d7 $1 {[%mdl 512]} Rh8 (61... Rh1 62. d8=Q) 62. Kd6 {Weighted Error Value: White=0.05/Black=0.49} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.12"]
[Round "6.2"]
[White "Sevian, Samuel"]
[Black "Caruana, Fabiano"]
[Result "1-0"]
[ECO "C47"]
[WhiteElo "2654"]
[BlackElo "2800"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,83,19,25,25,21,27,0,42,50,62,32,42,28,58,21,15,12,161,155,150,164,162,153,156,152,164,166,182,171,177,183,212,208,206,213,209,187,179,205,346,341,318,332,307,312,400,402,347,112,122,119,116,111,375,342,440,467,463,450,427,389,613,587,1425,1412,2131,1760]} 1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 O-O 8. O-O d6 9. Bg5 h6 10. Bh4 g5 {C47: Scotch Four Knights and Four Knights with 4 g3.} 11. Bg3 Qe7 {[#]} 12. Na4 $146 ({Predecessor:} 12. Re1 Bg4 13. Qd2 Nd7 14. f4 Nc5 15. a3 Nxd3 16. cxd3 Bc5+ 17. d4 Bb6 18. Kh1 {1-0 (30) Jones,C (2072)-Dickson,G (2071) England 2013}) 12... Ba5 {The position is equal.} 13. c3 Bb6 (13... Nxe4 $2 14. Re1 $18) 14. Nxb6 axb6 15. Qe2 Bg4 16. Qe3 Nh5 17. f4 d5 (17... Bd7 $11 {and Black has nothing to worry.}) 18. fxg5 $18 Nxg3 19. Qxg3 Qxg5 20. h4 $1 {[%cal Rh4g5]} Qg7 21. Qxc7 d4 22. c4 (22. Qxb6 $6 dxc3 23. bxc3 Qxc3 $14) 22... Rfc8 23. Qd6 (23. Qxb6 $6 Rab8 $14) 23... c5 24. Rf6 (24. Qxb6 $6 Rab8 $16) 24... Bh3 {[%csl Gh3][%cal Rg7g2]} 25. Rf2 Kh8 26. Qxb6 Rg8 {[%cal Rh3g2]} 27. e5 (27. Qxc5 $2 Bxg2 28. Qd6 Rxa2 $3 $19 {[%mdl 512]}) 27... Rae8 28. Re1 (28. Qxc5 Bxg2 29. Bg6 Qxg6 30. Qd6 Re6 31. Qd8 Ba8+ 32. Qg5 hxg5 33. h5 Qe4 34. Rh2 Rxe5 35. c5 Qe3+ 36. Rf2 Qg3+ 37. Kf1 Qh3+ 38. Kg1 Qh1#) 28... f5 (28... Re6 $142 29. Qb7 (29. Qxc5 $2 Bxg2 30. Qf8 Qxf8 $19) 29... Ree8) 29. Bf1 (29. Qxc5 Bxg2 30. Bf1 Bh3+ 31. Bg2 Bxg2 32. Ree2 Bf3+ 33. Rg2 Bxg2 34. Qxd4 Bh3+ 35. Kh1 Bg4 36. Rg2 Bf3 37. Qf2 Qxg2+ 38. Qxg2 Rxg2 39. b4 Rxe5 40. c5 Re1#) 29... f4 30. Qxc5 f3 {[%cal Rf3g2]} 31. e6 ({Don't go for} 31. Rxf3 $2 Bxg2 32. Qc7 Qxc7 $19) ({Much less strong is} 31. Qxd4 $6 Ref8 $18) 31... fxg2 32. Bd3 {aiming for e7.} Bxe6 {[#]} 33. Qe5 $2 (33. Rfe2 $1 $18 {[%cal Re2e6] and the rest is easy.} Ref8 34. Rxe6 Rf1+ {[%mdl 64] Decoy} 35. Rxf1 gxf1=Q+ 36. Kxf1 Qg1+ 37. Ke2 Qg4+ 38. Kd2 Qxe6 39. Qxd4+ Rg7 40. a4) 33... Qxe5 $16 34. Rxe5 {Black must now prevent Rfe2.} Bh3 {[#]} 35. Re4 Rxe4 $4 {[%mdl 8192]} (35... Rgf8 $16 {was necessary.}) 36. Bxe4 {[%mdl 4096] Endgame KRB-KRB} d3 37. Bxd3 Re8 {( -> ...Re1+)} 38. Be2 Kg7 39. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Re3 (39... Rb8 $142 40. Bf3 Rb4 41. Bxg2 Bxg2) 40. a5 $18 {White is clearly winning.} Re5 41. b4 Re3 {[#]} 42. Rf3 $1 {Weighted Error Value: White=0.15/Black=0.41} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.12"]
[Round "6.3"]
[White "So, Wesley"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "D27"]
[WhiteElo "2778"]
[BlackElo "2760"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,73,39,21,47,34,36,27,37,4,8,12,12,14,11,12,12,9,9,7,9,10,14,10,10,4,4,4,4,4,4,4,4,4,4,4,4,5,5,4,6,4,4,4,4,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O c5 7. dxc5 Bxc5 8. Qxd8+ Kxd8 9. Be2 Ke7 10. Nbd2 (10. Nc3 b5 11. Nd2 Bb7 12. Nb3 Nbd7 13. Na5 Rab8 14. Bd2 Ne4 15. Nxe4 Bxe4 16. Rfc1 Rhc8 17. a4 bxa4 18. Bxa6 {½-½ (35) So,W (2772)-Dominguez Perez,L (2758) Saint Louis 2021}) 10... b6 {[#] D27: Queen's Gambit Accepted: Classical main line: 7 e4!? and 7 a4.} 11. Nc4 $146 ({Predecessor:} 11. Ne5 Bb7 12. Nd3 Nbd7 13. Nxc5 Nxc5 14. b3 a5 15. Ba3 Nfd7 16. Nc4 Ba6 17. Nxb6 Bxe2 18. Rfe1 Bb5 19. Nxa8 Rxa8 20. Rac1 Rc8 21. Rc3 f6 22. Rec1 Kd6 23. Rd1+ Ke7 24. e4 Ke8 25. Rdc1 {1-0 (25) Nakamura,H (2745)-So,W (2767) Chess.com INT 2020}) 11... Nc6 12. Bd2 b5 {White has an edge.} 13. Nce5 Nxe5 {The position is equal.} 14. Nxe5 {[#] aiming for Rac1.} Bb7 15. Rfc1 Bd6 16. Nc6+ Bxc6 17. Rxc6 Rhc8 18. Rac1 Rxc6 19. Rxc6 Kd7 20. Rc2 Nd5 21. Bf3 Rc8 22. Rxc8 Kxc8 23. Bxd5 exd5 $11 {[%mdl 4096] Endgame KB-KB} 24. Bc3 g6 25. Kf1 Kd7 ({But not} 25... Bxh2 $6 26. g3 $16) 26. Ke2 Ke6 ({Much worse is} 26... Bxh2 $6 27. g3 $16) 27. h3 h5 28. Kd3 Bc5 29. f3 f5 30. b3 Be7 31. a4 Bc5 32. axb5 axb5 33. Bd4 Be7 34. Bc3 Bc5 35. Bd4 Be7 36. Bg7 Bc5 37. Bd4 {Weighted Error Value: White=0.04/Black=0.01} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.12"]
[Round "6.4"]
[White "Robson, Ray"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "B31"]
[WhiteElo "2669"]
[BlackElo "2607"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,91,15,15,13,20,0,7,9,27,8,25,22,25,24,19,0,17,13,4,0,1,0,23,0,0,0,0,0,0,0,14,4,4,9,13,0,0,0,0,0,0,-5,-5,-9,-5,-8,0,0,-4,-19,-27,-48,-37,-45,-10,-50,-11,-48,-50,-73,-74,-67,-44,-36,-10,-10,-13,-8,-10,-16,-27,-32,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 bxc6 5. d4 cxd4 6. Qxd4 {B31: Sicilian: 2...Nc6 3 Bb5 g6.} f6 $1 {6...f6 is better than 6...Nf6.} 7. Qa4 {[#]} Qb6 $146 ({Predecessor:} 7... Bg7 8. O-O Nh6 9. c4 Qb6 10. Nc3 O-O 11. Re1 Nf7 12. Be3 Qb7 13. Qb3 Qxb3 14. axb3 {½-½ (31) Vachier Lagrave,M (2774)-Radjabov,T (2758) Khanty Mansiysk 2019}) 8. c4 Qa6 9. Qc2 d5 10. cxd5 cxd5 11. exd5 Bf5 12. Qe2 Bd3 13. Qe6 Qxe6+ 14. dxe6 Nh6 $1 15. Nc3 Nf5 16. Nd5 O-O-O 17. Nb4 Bc4 18. g4 Ng7 19. Be3 {[#] And now Rc1 would win.} Kb7 20. Rc1 Rc8 21. Nd4 {aiming for Nbc6!} Bxe6 {Threatens to win with ...Rxc1+.} 22. O-O Bxg4 23. Nb3 {Strongly threatening Na5+.} e5 24. Na5+ Ka8 25. Rxc8+ Bxc8 26. Nd5 Bd6 27. Nxf6 Nf5 28. Rd1 Be6 29. a3 Rc8 30. b4 Nxe3 31. fxe3 Be7 32. Nd5 Bd8 (32... Bh4 $5 {[%cal Re6g4]} 33. Nb3 Rc2 $15) 33. Nb3 Bb6 34. Kf2 Rc2+ 35. Kf3 Rxh2 {White must now prevent ...Bxd5+.} (35... Bd4 $5 36. Nxd4 Bxd5+ 37. e4 Rc3+ 38. Kf2 Bxe4 $17) 36. Nc5 Bf5 {next ...Bxc5 is good for Black.} (36... Bxc5 $5 37. bxc5 Kb7 $15) 37. e4 Bc8 38. Ne7 Kb8 39. Nc6+ Kc7 40. Nxe5 Bxc5 41. Rc1 {[%mdl 64] [#] Pin. The position is equal.} Rh3+ 42. Kf4 Rh4+ 43. Kf3 Rh3+ 44. Kf4 Rh4+ 45. Kf3 Rh3+ 46. Kf4 {Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.12"]
[Round "6.5"]
[White "Naroditsky, Daniel"]
[Black "Bruzon Batista, Lazaro"]
[Result "1/2-1/2"]
[ECO "C44"]
[WhiteElo "2623"]
[BlackElo "2645"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,79,-2,-12,-12,-14,-16,-7,-22,-18,-22,-9,0,0,10,16,7,14,47,0,0,-6,-15,-34,-27,-34,-6,-15,-10,-13,-19,-18,-4,-8,-11,-3,-4,-20,-21,-21,-12,-10,-4,-4,-3,-15,-12,-14,-9,-11,-8,-23,-18,-24,0,0,0,-14,0,-3,0,0,0,-5,0,0,0,-2,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. c3 Nf6 4. d4 exd4 5. e5 Nd5 6. Bc4 Nb6 {C44: Ponziani Opening and Scotch Gambit.} 7. Bb3 d5 8. exd6 Bxd6 9. O-O O-O 10. Bg5 {[#]} Qe8 $146 ({Predecessor:} 10... Be7 11. Bxe7 Qxe7 12. Nxd4 Rd8 13. Nxc6 bxc6 14. Qc1 c5 15. Re1 Qh4 16. Qe3 Bb7 {0-1 (81) Lukasiewicz,A (2017)-Zeberski,J (2305) Poland 2017}) 11. Nxd4 Qe5 {[%csl Gd6][%cal Re5h2] [#]} 12. Nf3 Qa5 13. Nbd2 h6 14. Bh4 Bf5 15. Bc2 Rfe8 16. b4 Bxc2 17. Qxc2 Qh5 18. Bg3 Bxg3 19. hxg3 Rad8 20. Rfe1 Nd7 21. Nc4 Nf6 22. Rxe8+ Rxe8 23. Re1 Rxe1+ 24. Nxe1 a5 25. a3 axb4 26. axb4 Ne5 (26... Ne7 {feels hotter.} 27. Nf3 Qd5 28. Ne3 Qd6 29. b5 Ned5) 27. Nxe5 (27. Ne3 {is more complex.} Neg4 28. Nf1 Qd5 29. Nd3 Ne5 30. Nxe5 Qxe5 31. Qd2) 27... Qxe5 28. Nf3 Qe6 29. Qd3 c6 30. Qd8+ Kh7 31. Qd3+ Kg8 32. Qd8+ {The position is equal.} Kh7 33. Qd3+ g6 34. c4 Qe7 35. Qd4 Kg7 36. Qc3 Qe2 37. Qd4 Qe7 38. Qc3 Qe2 39. Qd4 Qe7 40. Qc3 {Weighted Error Value: White=0.05/Black=0.05} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.12"]
[Round "6.6"]
[White "Xiong, Jeffery"]
[Black "Swiercz, Dariusz"]
[Result "1/2-1/2"]
[ECO "B23"]
[WhiteElo "2700"]
[BlackElo "2647"]
[Annotator "TA"]
[PlyCount "120"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,120,17,12,10,58,52,57,27,32,29,40,37,30,34,65,58,60,61,62,98,93,95,74,92,93,113,105,108,107,90,95,96,97,97,82,93,79,90,86,95,92,93,86,93,96,78,98,84,199,208,239,239,239,239,239,239,1025,284,284,284,284,284,295,253,306,279,306,254,254,248,306,306,309,317,331,239,237,237,290,290,290,239,254,247,254,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nc3 a6 3. g3 b5 4. Bg2 Bb7 5. Nh3 e6 6. O-O {B23: Closed Sicilian: Lines without g3.} b4 7. Na4 Nf6 8. d3 {White is slightly better.} d6 9. c3 bxc3 10. bxc3 {[%cal Bb2c3,Bc3d4,Bd4d5,Bd5d6][%mdl 32]} Nbd7 {[#]} 11. Re1 $146 ({Predecessor:} 11. Nb2 Be7 12. f4 Qc7 13. Nf2 h6 14. Be3 Rb8 15. Qd2 d5 16. e5 d4 17. cxd4 Bxg2 18. Kxg2 {1-0 (55) Li,R (2577)-Cordova,E (2655) Saint Louis 2017}) 11... Bc6 12. d4 cxd4 13. cxd4 d5 14. exd5 Bxd5 15. Nf4 Bxg2 16. Kxg2 Qa5 17. d5 $1 {[%cal Rd5e6]} e5 18. d6 $1 Qb4 19. Bb2 Bxd6 20. Rb1 $1 Qb7+ 21. Kg1 $1 Qc7 22. Nd5 Nxd5 23. Qxd5 Rd8 24. Bc3 $1 Nf6 25. Bxe5 O-O 26. Bxf6 gxf6 27. Rbc1 $36 {[%mdl 2048] White is in control.} Qd7 28. Rc6 Rfe8 (28... Bb4 $16 29. Qxd7 Rxd7) 29. Rd1 $18 {Black must now prevent Nc5.} Qg4 {...Bxg3 is the strong threat.} 30. Rxd6 (30. Rxa6 $2 Bxg3 $1 {[%mdl 512]} 31. Re6 fxe6 $19) 30... Rxd6 31. Qxd6 {[%mdl 64] Double Attack} Qxa4 {[%mdl 4096] Endgame KQR-KQR} 32. Rd4 Re1+ 33. Kg2 Re6 34. Qb8+ ({Less strong is} 34. Rxa4 Rxd6 35. g4 Kg7 $14) 34... Re8 {And now ...Qc6+ would win.} 35. Rxa4 Rxb8 36. Rxa6 {KR-KR} Rb2 37. a4 {[%cal Ba2a4,Ba4a5,Ba5a6][%mdl 32]} (37. Rxf6 Rxa2 38. g4 Kg7 $18) 37... Ra2 38. Kf3 ({Not} 38. Rxf6 Rxa4 39. h4 Kf8 $16) 38... Kg7 39. a5 h5 40. Ra8 Kg6 41. a6 f5 42. Ra7 Ra3+ 43. Ke2 f4 {[#]} 44. Ra8 $1 ({Weaker is} 44. gxf4 f6 $16) 44... fxg3 45. hxg3 Kg7 46. Kd2 Rf3 {[#]} 47. Rc8 $2 (47. Ke1 $1 $18) 47... Rxf2+ $11 {The position is equal.} 48. Kc3 (48. Ke3 {seems wilder.} Ra2 49. Ra8 Ra3+ 50. Kf2 Ra2+ 51. Kf3) 48... Ra2 49. Rc6 {aiming for Kb4.} f5 50. Kb4 f4 51. gxf4 (51. Kb3 {is interesting.} Ra1 52. Kb2 Ra5 53. gxf4 h4 54. f5) 51... h4 52. Kb5 (52. f5 {is more complex.} h3 53. Rc7+ Kf6 54. Rh7 h2 55. a7) 52... h3 53. Rc3 h2 54. Rh3 Rb2+ 55. Kc6 Ra2 56. Rxh2 Rxh2 57. a7 Ra2 58. Kb7 Kf6 59. f5 Rxa7+ 60. Kxa7 Kxf5 {Black defended with fortune.  Weighted Error Value: White=0.11/Black=0.09} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.13"]
[Round "7.1"]
[White "Dominguez Perez, Leinier"]
[Black "Naroditsky, Daniel"]
[Result "1/2-1/2"]
[ECO "C63"]
[WhiteElo "2760"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,101,54,47,30,79,54,72,43,40,40,39,8,40,29,51,19,16,24,51,64,64,57,65,46,47,73,65,52,115,121,101,118,125,0,0,0,118,122,122,122,112,131,137,133,120,54,72,24,42,10,41,0,0,0,40,0,0,0,13,0,50,0,14,0,68,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 f5 4. Nc3 fxe4 5. Nxe4 Nf6 6. Nxf6+ Qxf6 7. Qe2 Be7 8. Bxc6 bxc6 9. Nxe5 {C63: Ruy Lopez: Schliemann/Jaenisch Defence.} Bb7 10. O-O O-O-O {[#]} 11. b3 $146 {White is better.} ({Predecessor:} 11. d4 c5 12. Be3 Rhe8 13. c3 Ba6 14. Qc2 Bxf1 15. Rxf1 Bd6 {0-1 (15) Petersons,I (2256)-Lins,T (2462) ICCF email 2019}) 11... Qf5 12. Bb2 Qxc2 13. Nc4 Rde8 14. Qh5 (14. Bxg7 $2 Bf6 $1 $19 {[%mdl 512]}) 14... Bf6 15. Bxf6 gxf6 16. Qc5 Qe4 17. f3 Qd5 18. Qxa7 c5 {Threatens to win with ...Rhg8!} 19. Na5 Qd4+ $1 20. Kh1 Bd5 21. Qa6+ $40 {[%mdl 128] White attacks.} Kb8 (21... Kd8 $14) 22. Rac1 $16 Rhg8 {...Rxg2! is the strong threat.} 23. Qb5+ Kc8 24. Qa6+ ({Don't blunder} 24. Rxc5 $2 {[#]} Rxg2 $3 {[%mdl 512]} 25. Rxc7+ (25. Kxg2 {is a self mate.} Qg4+ 26. Kh1 Bxf3+ 27. Rxf3 Qxf3+ 28. Kg1 Re1+ 29. Qf1 Rxf1#) (25. Rxd5 $2 Rxh2+ 26. Kxh2 Qh4+ 27. Kg1 Rg8+ 28. Rg5 Rxg5+ 29. Qxg5 Qxg5+ 30. Kh2 Qxa5 $19) 25... Kxc7 $19) (24. Qxc5 $16 Qxc5 25. Rxc5) 24... Kb8 $11 {White must now prevent ...Rxg2!} 25. Qb5+ ({White should try} 25. Rg1 $11) 25... Kc8 $16 {( -> ...Rxg2!)} 26. Qxc5 Qxc5 27. Rxc5 c6 28. Nc4 Bxc4 29. Rxc4 {[%mdl 4096] Endgame KRR-KRR} Re2 30. g3 ({White should play} 30. Rg4 $16 Rxg4 31. fxg4) 30... Rxd2 $14 31. Ra4 {Strongly threatening Ra8+.} Kb7 32. Kg1 d5 33. Rf2 Rd1+ 34. Rf1 Rd2 35. Rf2 Rd1+ 36. Kg2 Re8 37. Rh4 Re7 (37... Kb6 {seems wilder.} 38. Rxh7 Rd8 39. Re7 d4 40. Rf1 Rd2+) 38. Rf4 Re6 39. Rh4 (39. Rb4+ $11 Ka6 40. Rb8) 39... Re7 40. Rf4 (40. Rb4+ $1 $14 Kc7 41. a4) 40... Re6 $11 {The position is equal.} 41. Rb2 (41. Rb4+ {keeps more tension.} Ka6 42. Rb8 Rd6 43. Rc2 d4 44. Rc4) 41... d4 42. Re4 (42. Kf2 {with more complications.} Kb6 43. a3 d3 44. Re4 Rd6 45. Ke3) 42... Rxe4 43. fxe4 {KR-KR} c5 44. Rf2 Ra1 45. Rc2 Kb6 46. Kf3 Re1 47. Re2 Rf1+ 48. Rf2 Re1 49. Re2 $1 {[%cal Re2e1]} Rf1+ 50. Rf2 Re1 51. Re2 $1 {[%cal Re2e1] Weighted Error Value: White=0.16/Black=0.07} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.13"]
[Round "7.2"]
[White "Swiercz, Dariusz"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2647"]
[BlackElo "2714"]
[Annotator "TA"]
[PlyCount "136"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,136,32,0,0,-24,-7,0,0,0,6,12,9,8,15,16,17,-5,0,0,0,0,12,6,8,0,0,0,10,0,0,0,3,12,32,0,18,0,0,0,0,-2,-7,-14,0,0,0,0,0,0,0,0,0,-11,0,0,0,-8,0,0,47,66,117,50,43,45,47,51,49,6,61,0,1,0,0,0,0,0,0,0,61,66,64,0,0,0,66,65,65,65,79,8,25,0,0,0,0,0,27,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,-8]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. h3 Bd7 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} 10. Rd1 Be7 11. a4 a5 12. Ng5 {[#]} Ke8 $146 {[#]} (12... Re8 {feels hotter.} 13. Nxf7+ Kc8 14. Ng5 c5 15. Nf3 Bc6) ({Predecessor:} 12... Bxg5 13. Bxg5+ Ke8 14. g4 h6 15. Bf4 Ne7 16. Nc3 Be6 17. Bg3 h5 18. f3 Ng6 {½-½ (36) Noble,M (2489)-Chen,F (2327) ICCF email 2019}) 13. Nxf7 $1 Kxf7 14. Rxd7 Rad8 15. Rd2 Ke6 16. Nc3 Rxd2 17. Bxd2 Nd4 18. Rc1 Bb4 {aiming for ...Bxc3.} 19. Kf1 Kxe5 20. Nb1 Ne6 21. c3 Bc5 22. b4 Bb6 23. Na3 Ra8 24. Nc4+ Kf6 25. Ra1 Ke7 26. Ra2 Kd7 27. g3 axb4 28. cxb4 Bd4 29. Ra3 b6 30. f4 g6 31. Ke2 Re8 (31... Kc8 {with more complications.} 32. Kd3 Kb7 33. Ke4 c5 34. b5 Bg7) 32. Kf3 b5 33. axb5 cxb5 34. Ne3 Kc6 35. Rd3 Ra8 36. g4 Bb6 37. Bc3 Ra3 38. Ke4 Ra2 {[#]} (38... Kb7 $14) 39. Nd5 (39. Ke5 $1 $16 {[%cal Re5e6]} Re2 40. Kxe6 Bxe3 41. f5) 39... Re2+ $14 40. Kf3 Rf2+ 41. Kg3 Ba7 42. Be5 {White wants to play Nxc7!} Re2 {[#]} (42... Rc2 $11) 43. h4 ({White should try} 43. Nxc7 $1 $14 Rxe5 44. fxe5 Kxc7 45. Kf3) 43... Re4 $11 44. Kf3 Rc4 45. h5 gxh5 46. gxh5 Nd4+ 47. Ke4 {[%cal Re5d4]} Nc2+ (47... Nb3+ $1 $11 48. Kf5 Nd4+ 49. Bxd4 Bxd4) 48. Kf5 $14 Nd4+ $1 49. Ke4 ({White should play} 49. Bxd4 $14 Bxd4 50. Ke6) 49... Nc2+ (49... Ne6+ $11 50. Kf5 Nd4+ 51. Bxd4 Bxd4) 50. Kf5 Nd4+ $1 ({Much worse is} 50... Nxb4 51. Nxb4+ Rxb4 52. h6 $16) 51. Bxd4 Bxd4 {[%mdl 4096] Endgame KRB-KRN} 52. Ke6 Bb2 53. h6 (53. f5 $16) 53... Bc1 54. Kf5 (54. f5 {looks sharper.} Re4+ 55. Kf7 Bxh6 56. Ne7+ Kb6 57. Rc3) 54... Kb7 55. Rf3 Bb2 56. Re3 Kc6 57. Rd3 Kb7 {The position is equal.} 58. Rd2 Bc1 59. Rf2 c5 60. bxc5 Kc6 61. Nf6 b4 62. Nxh7 {Strongly threatening Nf6.} b3 {White must now prevent ...Rxf4+!} 63. Nf6 {h7 is the strong threat.} b2 64. Rxb2 $1 Rxf4+ 65. Ke5 Bxb2+ 66. Kxf4 {Threatening mate with Kf5.} Bxf6 67. h7 Kxc5 68. h8=Q Bxh8 {Weighted Error Value: White=0.14/Black=0.08} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.13"]
[Round "7.3"]
[White "Caruana, Fabiano"]
[Black "Robson, Ray"]
[Result "1-0"]
[ECO "A25"]
[WhiteElo "2800"]
[BlackElo "2669"]
[Annotator "TA"]
[PlyCount "179"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,179,-9,-9,-9,-15,-16,0,0,30,22,20,17,25,21,26,21,44,38,42,38,39,26,25,26,31,2,11,11,9,5,62,0,0,0,7,0,0,0,0,0,10,10,8,4,19,21,30,24,22,21,21,22,66,18,18,19,20,16,39,13,38,45,53,53,53,53,53,53,51,46,46,48,50,43,75,79,113,84,120,120,120,120,120,77,64,0,120,80,80,80,120,120,113,71,73,57,57,57,71,64,71,23,115,115,115,115,115,115,115,115,115,0,115,64,103,57,107,107,107,107,107,107,107,107,107,107,107,107,107,107,107,107,107,0,0,0,0,0,778,615,1029,876,815,791,29964,29968,29966,12842,29973,29974,29975,29976,29976,29977,29979,29980,29985,29985,29984,29982,29982,29981,29981,29982,29982,29983,29986,29987,29986,29987,29991,29992]} 1. c4 e5 2. Nc3 Nf6 3. g3 Bb4 4. e4 Nc6 5. Bg2 d6 6. h3 {A25: English Opening vs King's Indian with ...Nc6 but without early d3.} Be6 7. d3 {[#]} Nd7 $146 ({Predecessor:} 7... Nd4 8. a3 Bxc3+ 9. bxc3 Nc6 10. Ne2 O-O 11. O-O Qd7 12. Kh2 Ne7 13. f4 Ng6 {1-0 (61) Meiwes,T (962)-Albert,E (906) Verden 2015}) 8. Nge2 {The position is equal.} f5 9. O-O O-O 10. f4 Bxc3 11. Nxc3 fxe4 12. Nxe4 {Strongly threatening Ng5.} h6 13. g4 exf4 14. Bxf4 d5 15. cxd5 Bxd5 16. Qd2 Nd4 17. Rae1 Ne6 18. Bg3 Rxf1+ 19. Rxf1 Ndc5 ({Black should try} 19... Nb6 $11) 20. Qc3 (20. Nxc5 $1 $14 Nxc5 21. Rf5) 20... Nxe4 $11 21. dxe4 Bc6 22. Qb3 Qd4+ 23. Kh2 Re8 24. Rd1 (24. h4 {feels hotter.} a5 25. Rf5 a4 26. Qc2 Nf8 27. Bf2) 24... Qa4 25. Qxa4 Bxa4 26. Rd5 Bc6 27. Re5 g5 28. Bf1 Kg7 29. Kg2 Kf6 {Black wants to play ...Nf4+.} 30. Kf2 Nf4 31. Rxe8 Bxe8 $14 {[%mdl 4096] Endgame KBB-KBN} 32. Ke3 Ke5 33. Be1 Ne6 34. Bc4 Bg6 35. b4 a6 36. a4 Nf4 {[#] And now ...Ng2+ would win.} 37. Bc3+ Kd6 38. Bg7 h5 39. Bf1 hxg4 40. hxg4 Ne6 41. Bf6 Kd7 42. a5 Kd6 43. Bc4 Kd7 44. Bd5 c6 45. Bc4 Bh7 46. Bd4 Bg6 47. Bf6 ({Better is} 47. Bc3 $14) 47... Bh7 $1 $16 48. Bf1 Ke8 49. Bd3 Bg6 50. Bc4 Kd7 51. Bd4 Bh7 52. Ba7 Bg6 53. Bb3 Ke7 54. Bc2 Kd7 $1 55. Kf3 Bh7 (55... c5 $1 $11 {keeps the balance.} 56. Ba4+ (56. Bxc5 Nxc5 57. bxc5 Kc6 $11) 56... Kd6) 56. Be3 Bg6 57. Bd3 Ke7 58. Ke2 Ke8 59. Kd2 Kf8 60. Bc5+ (60. e5 $16 Bxd3 61. Kxd3) 60... Kg7 (60... Nxc5 $11 61. bxc5 Ke7) 61. Ke3 (61. Kc3 $16) 61... Kg8 62. Bc4 Bf7 63. Be7 Kg7 64. e5 Kg8 65. Kd2 Kg7 66. Bd3 Kg8 67. Bf5 Kg7 68. Kd3 Nf4+ 69. Kd4 Ne6+ 70. Kc4 Kg8 71. Bxg5 Nxg5+ $11 72. Kc5 {Hoping for Bc8.} Bd5 73. Bc8 Ne6+ $2 {[%mdl 8192] Black is on the road to losing.} (73... Ne4+ $11 74. Kb6 c5 75. bxc5 Kf7) 74. Kd6 $18 Kf7 75. Bxb7 {[%mdl 64] [#] Double Attack} Bc4 76. Bxc6 Nd4 77. Bd5+ Bxd5 78. Kxd5 {KN-KP} Nb5 79. g5 {White mates.} Ke7 80. g6 Nc3+ 81. Kc6 Na2 82. b5 axb5 83. Kxb5 {KN-K3P} Nc3+ 84. Kc4 Na4 85. Kb4 Nb2 86. a6 {[%cal Ba5a6,Ba6a7][%mdl 32]} Nd3+ 87. Kb5 Nf4 88. g7 Kf7 89. a7 Nd5 90. g8=B+ {[%mdl 64] Decoy, Promotion.  Weighted Error Value: White=0.12/Black=0.14} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.13"]
[Round "7.4"]
[White "Bruzon Batista, Lazaro"]
[Black "Sevian, Samuel"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "2645"]
[BlackElo "2654"]
[Annotator "TA"]
[PlyCount "44"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,44,13,18,17,6,0,0,0,0,12,-17,16,0,0,8,0,0,0,0,0,0,0,0,0,-112,-111,-108,-118,-152,-153,-672,-641]} 1. Nf3 d5 2. g3 Nf6 3. Bg2 c5 4. c4 d4 5. e3 Nc6 6. exd4 cxd4 7. O-O e6 8. d3 Bd6 {A13: English Opening: 1...e6.} 9. Na3 O-O 10. Nc2 e5 {The position is equal.} 11. b4 Re8 12. c5 Bc7 {[#]} 13. Re1 $146 ({Predecessor:} 13. Bg5 h6 14. Bxf6 Qxf6 15. Nd2 Qg6 16. b5 Ne7 17. Nc4 Be6 18. Re1 Bxc4 19. dxc4 {1-0 (40) Mikhalevski,V (2565)-Schiendorfer,E (2310) Porto Carras 2018}) 13... e4 14. dxe4 {[%cal Rf3d4]} d3 15. Na3 Bg4 $1 16. h3 Bxf3 17. Bxf3 Nxb4 18. Rb1 a5 {[%cal Ba7a5,Ba5a4][%mdl 32]} 19. Kg2 (19. Nb5 $11) 19... Nd7 $17 20. Be3 Ne5 21. Rb3 Nxa2 {[#] Strongly threatening ...a4.} 22. Kh2 $2 (22. Bd2 $17) 22... a4 {Weighted Error Value: White=0.71/Black=0.02} 0-1

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.13"]
[Round "7.5"]
[White "Lenderman, Aleksandr"]
[Black "Xiong, Jeffery"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2607"]
[BlackElo "2700"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,75,15,18,8,21,20,16,12,23,20,16,20,19,17,26,34,25,24,40,30,59,50,53,48,52,43,47,47,64,56,76,35,48,47,41,50,40,30,33,19,23,19,27,-20,-24,-20,-34,-17,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 exd5 5. Bg5 c6 6. e3 Bd6 7. Bd3 O-O 8. Qc2 {D35: Queen's Gambit Declined: Exchange Variation.} h6 9. Bh4 Re8 10. Nge2 a5 11. h3 Na6 12. a3 Nc7 13. O-O Bd7 14. Rae1 {[#]} Be7 $146 ({Predecessor:} 14... b5 15. e4 dxe4 16. Nxe4 Be7 17. Nc5 Nfd5 18. Bg3 Bxc5 19. dxc5 Ne6 20. Bd6 Qf6 {1-0 (32) Andreikin,D (2728)-Urazayev,A (2453) Chess.com INT 2021}) 15. Bg3 Rc8 16. Be5 Be6 17. Nf4 Bd6 18. Bxd6 Qxd6 19. Na4 Rb8 20. Rc1 Ne4 21. Rfe1 Bd7 22. f3 (22. Nb6 {feels hotter.} Na8 23. Nxd7 Qxd7 24. Qb3 Nd6 25. Rc5) 22... Nf6 23. Qc5 Qxc5 24. Nxc5 Bc8 25. Bf1 Re7 26. Na4 Bf5 27. g4 g5 28. gxf5 {[#] Hoping for Nd3.} (28. Nd3 {is more complex.} Bh7 29. Ne5 Nfe8 30. Nc5 Kg7 31. Ned7) 28... gxf4 29. exf4 Rxe1 30. Rxe1 Re8 {The position is equal.} 31. Rc1 Nd7 32. Kf2 Kg7 33. Bd3 Ra8 34. Nc3 Nf6 35. Na4 Nd7 36. Nc3 Nf6 37. Na4 Nd7 38. Nc3 {Weighted Error Value: White=0.05/Black=0.05} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.13"]
[Round "7.6"]
[White "Burke, John M"]
[Black "So, Wesley"]
[Result "0-1"]
[ECO "C65"]
[WhiteElo "2554"]
[BlackElo "2778"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,68,11,11,8,15,20,41,10,8,-22,-25,-28,0,0,0,16,11,-70,-62,-78,-84,-72,-15,-68,-61,-65,-67,-73,-58,-54,-77,-75,-88,-109,-102,-115,-111,-93,-81,-74,-87,-103,-113,-95,-40,-93,-93,-97,-102,-219,-183,-164,-175,-264,-275,-444,-485,-474,-473,-425,-380]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. c3 O-O 6. O-O {C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5.} Re8 7. Nbd2 a6 8. Ba4 {White is slightly better.} (8. Bxc6 $5 dxc6 9. Nc4 $11) 8... d5 9. d4 exd4 10. cxd4 Ba7 ({Reject} 10... Nxd4 $6 11. Bxe8 Nxe8 12. Nxd4 $16) 11. e5 {Threatens to win with Bxc6.} Ne4 12. Bxc6 bxc6 13. Qc2 ({White should play} 13. Nb3 $11) 13... Bf5 $1 $15 14. Qxc6 Re6 15. Qa4 c5 (15... Rg6 $17) 16. dxc5 {[#]} (16. Nxe4 $11 dxe4 17. Ng5) 16... Nxc5 $146 ({Predecessor:} 16... Rg6 17. Nxe4 Bxe4 18. Ne1 Bxc5 19. Kh1 Qb8 20. f3 Bf5 21. Qa5 Rc6 22. f4 Be4 {0-1 (44) Colbow,C (2167)-Keller,P (2279) Vellmar 2019}) 17. Qf4 Bd3 18. b4 $1 {[%cal Rb4c5]} Ne4 19. Nxe4 dxe4 20. Ng5 {[%mdl 64] [#] Double Attack} Re7 21. Bb2 e3 ({Much worse is} 21... Bxf1 $6 22. Rxf1 Qd3 23. Nxe4 $15) 22. fxe3 Bxf1 23. Rxf1 {And now Qe4 would win.} Qd3 24. Bd4 Bxd4 25. exd4 {[%cal Rg5f7]} Rd8 $36 {[%mdl 2048] Black is really pushing.} 26. Nf3 Qc3 (26... Rb7 $17) 27. h4 ({White should try} 27. Nh4 $15) 27... Qxb4 $17 28. h5 h6 29. g4 (29. Rc1 $17) 29... Rb7 30. Qe4 Rb6 31. Qc2 (31. Rf2 $142) 31... Rdb8 $19 32. Rd1 $2 (32. Kf2) 32... Qa3 {Black is clearly winning.} 33. Rd3 {[#]} Rb2 $1 {[%mdl 512]} 34. Rxa3 Rxc2 {Weighted Error Value: White=0.29/Black=0.09} 0-1

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.14"]
[Round "8.1"]
[White "Xiong, Jeffery"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2700"]
[BlackElo "2800"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,80,13,17,16,18,22,0,25,0,0,4,6,16,0,11,10,13,9,4,31,27,27,28,20,27,29,27,17,4,36,35,29,33,64,64,52,28,27,0,0,0,0,0,0,0,33,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 d5 2. d4 Nf6 3. c4 e6 4. Nc3 Bb4 5. Qa4+ Nc6 6. e3 O-O 7. Bd2 dxc4 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 8. Bxc4 Bd6 9. Qc2 e5 10. dxe5 Nxe5 11. Nxe5 Bxe5 12. f4 Bxc3 13. Bxc3 g6 14. e4 {[#]} Re8 $146 ({Predecessor:} 14... Qe7 15. Bxf6 Qxf6 16. O-O Be6 17. e5 Qe7 18. Bxe6 fxe6 19. g3 Rad8 20. Rad1 c6 {½-½ (29) Daroczy,S (2136)-Huber,M (2286) ICCF email 2018}) 15. Bd3 Nxe4 16. Bxe4 {[#] Threatens to win with 0-0.} Bf5 17. Be5 Bxe4 18. Qxe4 {0-0 is the strong threat.} f6 {[#]} 19. O-O $1 {Strongly threatening Qc4+.} fxe5 20. fxe5 {Black must now prevent Qc4+.} Qe7 21. Qxb7 Qxe5 22. b3 a5 23. Rac1 c5 24. Qb5 a4 25. Qc4+ (25. Kh1 {with more complications.} Qe6 26. bxa4 Qxa2 27. Rf4 Qd5 28. h3) 25... Qe6 26. bxa4 (26. Qxc5 {keeps more tension.} Rac8 27. Qd4 Rxc1 28. Rxc1 axb3 29. axb3 Qxb3 30. h4) 26... Qxc4 27. Rxc4 $11 {[%mdl 4096] Endgame KRR-KRR} Re2 28. Rf2 Re1+ 29. Rf1 Re2 {The position is equal.} 30. a3 Re3 31. Rf3 (31. Ra1 {feels hotter.} Kg7 32. Kf2 Rb3 33. g3 Rb2+ 34. Kg1) 31... Rxf3 32. gxf3 {KR-KR} Kf7 33. Rxc5 Rxa4 34. Rc3 Kf6 35. Kf2 g5 36. Ke3 Rh4 37. Rc2 Ra4 38. Rc3 Rh4 39. Rc2 Ra4 40. Rc3 Rh4 {Weighted Error Value: White=0.04/Black=0.03} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.14"]
[Round "8.2"]
[White "Sevian, Samuel"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "C43"]
[WhiteElo "2654"]
[BlackElo "2760"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,79,5,0,0,0,4,5,5,5,12,5,4,3,13,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nf6 3. d4 Nxe4 4. Bd3 d5 5. Nxe5 Nd7 6. Nc3 Nxc3 7. bxc3 Bd6 8. O-O O-O 9. Re1 {The position is equal.} c5 {The modern move. C43: Petroff Defence: 3 d4.} 10. Nxd7 Qxd7 11. dxc5 Bxc5 12. Qh5 {[%csl Gd3][%cal Rh5h7] [#]} h6 {[#]} 13. Be3 $146 ({Predecessor:} 13. h3 Qd6 14. Qh4 Qd8 15. Qg3 Bd6 16. Bf4 Bxf4 17. Qxf4 Re8 18. Qd4 Rxe1+ 19. Rxe1 {½-½ (25) Grandelius,N (2670)-Nguyen,T (2577) Tornelo INT 2021}) 13... Bxe3 14. Rxe3 Qd6 15. Qh4 Bd7 16. Qd4 Rfe8 17. Rxe8+ Bxe8 18. c4 Bc6 19. Be4 {[%cal Rc4d5]} Qb4 $1 20. Bxd5 Bxd5 21. Qxd5 $11 {[%mdl 4096] Endgame KQR-KQR} Rc8 22. a3 Qc3 (22... Qxc4 {with more complications.} 23. Qxb7 Qxc2 24. g3 Rc7 25. Qd5 Kh7) 23. Rb1 b6 24. Qd7 Qxc4 25. Qxa7 Qxc2 {[%cal Rc2b1] [#]} 26. Re1 Qc3 {[%cal Rc3e1]} (26... Qb2 {seems wilder.} 27. g3 Qc3 28. Rf1 Qf6 29. a4 Rc4) 27. Kf1 Qd3+ (27... Qb2 {feels hotter.} 28. g3 g6 29. Kg2 Rc2 30. Qb8+ Kg7) 28. Kg1 Qd2 {[%cal Rd2e1]} 29. Rf1 Qa5 (29... Qd4 {is interesting.} 30. a4 Rc4 31. a5 bxa5 32. Qxa5 g6) 30. Qe7 Ra8 (30... Qd5 {looks sharper.} 31. Qb4 b5 32. Qb1 g5 33. Rd1 Qe5) 31. Qb7 Qa6 (31... Re8 {is more complex.} 32. Qf3 Re6 33. Qd3 Re1 34. g3 Rxf1+ 35. Kxf1 Qc5) 32. Qxa6 Rxa6 {KR-KR} 33. Ra1 Kf8 34. Kf1 Ke7 35. Ke2 Kd6 36. Rd1+ Kc6 37. Rc1+ Kd6 38. Rd1+ Kc6 39. Rc1+ Kd6 40. Rd1+ {A rather calm draw.  Weighted Error Value: White=0.01/Black=0.00} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.14"]
[Round "8.3"]
[White "Shankland, Sam"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2714"]
[BlackElo "2778"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,83,27,19,0,0,0,0,0,0,0,14,23,31,22,31,0,0,0,0,0,31,29,25,0,8,12,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Nc3 Be7 10. Rd1+ Ke8 11. g4 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} Nh4 12. Nxh4 Bxh4 13. f3 h5 14. h3 hxg4 15. hxg4 f6 16. exf6 gxf6 17. Bf4 f5 18. g5 Rh5 19. Ne2 {[#]} Be6 $146 (19... Kf7 {is interesting.} 20. Rd2 Bxg5 21. Bxg5 Rxg5+ 22. Kf2 Rg8) ({Predecessor:} 19... Kf7 20. Rd8 Bxg5 21. Bxg5 Rxg5+ 22. Kf2 Rg8 23. Rxg8 Kxg8 24. Kg3 Be6 25. Nd4 Kf7 {½-½ (55) Kokkila,T (2543)-Stull,N (2574) ICCF email 2012}) 20. Kg2 ({Much worse is} 20. Bxc7 Rxg5+ 21. Kf1 Kf7 $15) 20... Kf7 21. Ng3 (21. Rh1 {keeps more tension.} Kg6 22. Bxc7 Bxg5 23. Rxh5 Kxh5 24. Nf4+) 21... Bxg3 {The position is equal.} (21... Rh7 {with more complications.} 22. Rh1 Kg6 23. b3 Bg8 24. Bxc7 Bxg5 25. Rxh7 Bxh7 26. Rd1 Re8) 22. Kxg3 Rah8 23. Kf2 Rh4 24. Bxc7 f4 {[#] ...Rh2+ is the strong threat.} 25. Rg1 Kg6 26. Rad1 Rh2+ 27. Rg2 Rxg2+ 28. Kxg2 Kxg5 $11 {[%mdl 4096] Endgame KRB-KRB} 29. Rd4 Bxa2 30. Bxf4+ Kf5 31. Bg3 Bd5 32. Rf4+ Kg6 33. Rg4+ Kf7 34. Rh4 Rxh4 35. Bxh4 {KB-KB} b5 36. b4 Ke6 37. Bf2 a6 38. Bd4 Ba2 39. Kf2 Bd5 40. Kg2 Bc4 41. Kf2 Bd5 42. Kg2 {Not much happened in this game.  Weighted Error Value: White=0.04/Black=0.02} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.14"]
[Round "8.4"]
[White "Swiercz, Dariusz"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "B31"]
[WhiteElo "2647"]
[BlackElo "2607"]
[Annotator "TA"]
[PlyCount "138"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,137,18,25,33,25,32,29,21,8,16,21,29,38,12,3,33,13,12,4,21,18,52,43,72,71,80,62,80,85,72,81,86,84,65,64,87,64,64,64,65,60,65,65,141,122,122,122,279,278,274,87,129,129,162,158,227,122,137,107,188,114,263,267,274,273,273,273,273,0,102,0,235,266,262,249,244,235,235,226,172,191,266,266,266,204,197,116,116,108,108,108,108,114,114,114,114,235,354,0,116,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,29986,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. Bxc6 bxc6 5. O-O Bg7 6. Re1 Qc7 {B31: Sicilian: 2...Nc6 3 Bb5 g6.} 7. d3 e5 {[#]} 8. c3 $146 ({Predecessor:} 8. b4 cxb4 9. a3 bxa3 10. Bxa3 Ne7 11. d4 exd4 12. e5 c5 13. Nbd2 Bb7 14. Nb3 {½-½ (25) Horwitz,D (2321)-Khairullin,R (2331) ICCF email 2018}) 8... Nf6 {White has an edge.} 9. d4 cxd4 10. cxd4 exd4 11. Qxd4 O-O 12. Nc3 Qb6 13. e5 Qxd4 14. Nxd4 Ng4 15. Bf4 f6 {[%cal Rf6e5]} 16. e6 dxe6 17. Nxe6 Bxe6 18. Rxe6 g5 19. Bd6 {[%cal Rd6f8]} Rfe8 20. Rae1 Rxe6 21. Rxe6 f5 22. h3 Nf6 23. Be7 Kf7 24. Bxf6 Bxf6 25. Rxc6 $14 {[%mdl 4096] Endgame KRB-KRN} Rd8 26. g4 Bxc3 (26... fxg4 $1 $14 27. hxg4 Rd4) 27. Rxc3 fxg4 28. hxg4 {KR-KR} Rd2 $2 (28... Rd4 $16 {was necessary.}) 29. Rc7+ $18 Kg6 30. Rb7 $2 (30. Rxa7 $18 {and the rest is easy. Strongly threatening Ra6+.} Rxb2 31. Kg2) 30... a5 31. Rb6+ Kf7 32. Rb5 Kf6 (32... a4 $16 {might work better.} 33. Kg2 (33. Rxg5 Rxb2 34. Rh5 Kg6 $11) 33... Ke6) 33. Kg2 ({Don't take} 33. Rxa5 $6 Rxb2 34. Kg2 h6 $16) (33. Rf5+ $18 Kg6 34. Rxa5) 33... a4 34. a3 Rd4 (34... Rd6 $16 {keeps fighting.} 35. Rf5+ Kg6) 35. Kf3 (35. Rb6+ $1 $18 Ke5 36. Kg3) 35... Rf4+ (35... Rd6 $16 36. Rb4 Ra6) 36. Kg3 Rd4 37. Rb6+ Kf7 38. Rb7+ Kg6 39. Rb6+ (39. Rb4 $1 $18 {[%cal Rb4d4] is the precise move to win.} Rd2 40. Rxa4) 39... Kf7 $1 $16 40. Rb7+ (40. Rb8 $16) 40... Kg6 $18 41. Rb4 $1 {[%cal Rb4d4]} Rd3+ 42. Kg2 $1 Rd2 43. Kf3 Rc2 44. Ke3 h6 45. f3 Kg7 (45... Kf7 $142 46. Ke4 (46. Rxa4 Rxb2 47. Ra6 Ke7 $18) 46... Kf6 47. Rxa4 Re2+ 48. Kd5 Rxb2 49. Ra6+ Kg7 50. Ra7+ Kg6) 46. Rxa4 Rxb2 47. Rb4 Ra2 {[#]} 48. Rb3 ({White should play} 48. Rb7+ $1 $18 Kf6 49. Ra7) 48... h5 $16 49. gxh5 Kh6 50. Kd4 Kxh5 51. Kc5 g4 52. fxg4+ Kxg4 53. Kb4 Kf4 54. Rh3 $2 (54. Rd3 $18) 54... Ke5 {[#]} (54... Ke4 $1 $11) 55. Rh6 ({White must play} 55. Rd3 $1 $16) 55... Kd5 $11 56. a4 Rb2+ 57. Ka5 (57. Kc3 {with more complications.} Rb8 58. Kd2 Kc5 59. a5 Kb5 60. a6) 57... Kc5 58. Ka6 Rb8 59. Ka7 (59. Rh5+ {seems wilder.} Kc4 60. a5 Kb4 61. Rh4+ Kc5 62. Ka7) 59... Rg8 60. a5 (60. Rh4 {is interesting.} Rg7+ 61. Ka6 Rg8 62. Rf4 Ra8+ 63. Kb7) 60... Rg7+ 61. Ka6 Rg8 62. Kb7 (62. Rh1 {is more complex.} Rg6+ 63. Ka7 Rg7+ 64. Kb8 Rg8+ 65. Kb7) 62... Rg7+ 63. Ka6 Rg8 $1 64. Rh7 (64. Rh1 {feels hotter.} Ra8+ 65. Kb7 Rxa5 66. Rh5+ Kb4 67. Rxa5 Kxa5 68. Kc7) 64... Ra8+ 65. Ra7 Rxa7+ 66. Kxa7 {Intending a6 and mate.} Kc6 {The position is equal.} 67. a6 Kc7 68. Ka8 Kb6 69. a7 Kc7 {Weighted Error Value: White=0.30/Black=0.18} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.14"]
[Round "8.5"]
[White "Robson, Ray"]
[Black "Bruzon Batista, Lazaro"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2669"]
[BlackElo "2645"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,94,45,35,55,35,36,35,52,27,31,32,24,29,31,0,4,0,0,0,0,0,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,8,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Be7 7. O-O Bf5 8. Re1 Nc6 9. Nbd2 Nxd2 10. Qxd2 Bxd3 11. Qxd3 O-O 12. c3 a6 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} 13. Bf4 Bd6 {[#]} 14. Ng5 $1 {[%csl Gg5][%cal Rd3h7]} g6 {White is slightly better.} 15. Qh3 {[%csl Gg5][%cal Rh3h7]} h5 16. Qg3 Bxf4 $1 17. Qxf4 Qd7 {[#]} 18. h4 $146 ({Predecessor:} 18. Re3 Rae8 19. Rae1 Rxe3 20. Qxe3 Qf5 21. h4 Qg4 22. g3 Qf5 23. Kg2 Kg7 24. Qd2 {½-½ (33) Stevic,H (2616)-Mamedov,N (2596) Antalya 2017}) 18... Rae8 {The position is equal.} 19. Nh3 Ne7 20. Qg5 Nf5 21. Nf4 Qd8 22. Qxd8 Rxd8 23. Re5 c6 24. g3 Nd6 25. Rae1 Rfe8 26. f3 Kf8 27. Kf2 Nc4 28. R5e2 Rxe2+ 29. Rxe2 $11 {[%mdl 4096] Endgame KRN-KRN} Re8 30. Nd3 (30. b3 {seems wilder.} Nd6 31. Rxe8+ Kxe8 32. b4 b6 33. a4) 30... Rxe2+ 31. Kxe2 {KN-KN} a5 32. Nc5 Nd6 33. g4 Ke7 34. b4 b6 35. Nd3 f6 36. bxa5 bxa5 37. gxh5 gxh5 38. Nf4 Nf5 39. Nxh5 Nxh4 40. Nf4 Nf5 41. Nd3 Nd6 42. Nc5 Nc4 43. Kd3 Kd6 44. Kc2 Kc7 45. Kd3 Kd6 46. Kc2 Kc7 47. Kd3 Kd6 {Weighted Error Value: White=0.03/Black=0.01} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.14"]
[Round "8.6"]
[White "Naroditsky, Daniel"]
[Black "Burke, John M"]
[Result "1/2-1/2"]
[ECO "D42"]
[WhiteElo "2623"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,77,13,13,13,0,0,14,0,0,0,-5,0,3,-12,28,33,27,27,31,32,34,25,31,26,37,40,40,0,0,4,22,15,25,20,14,12,28,9,12,0,36,27,31,12,12,16,34,40,64,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. c4 c5 3. Nc3 e6 4. e3 Nc6 5. d4 d5 6. cxd5 Nxd5 7. Bd3 Be7 8. O-O O-O 9. Nxd5 {9.Qe2 is a critical line.} Qxd5 10. Qc2 {D42: Queen's Gambit Declined: Semi-Tarrasch: 5 cxd5 Nxd5 6 e3 Nc6 7 Bd3 .} Qh5 11. Be2 Qg6 12. Bd3 Qh5 13. Be4 cxd4 14. Nxd4 {[#]} Bd6 $146 {[%csl Gd6][%cal Rh5h2] [#]} ({Predecessor:} 14... Nxd4 15. exd4 Bd6 16. h3 Rb8 17. a4 Bd7 18. Bf3 Qg6 19. Qxg6 hxg6 20. Be3 Rfc8 21. d5 b6 22. Rfd1 e5 {½-½ (48) Ladva,O (2530)-Kveinys,A (2526) Liepaja 2017}) 15. f4 (15. g3 {looks sharper.} Nxd4 16. exd4 Rb8 17. Qd1 Qxd1 18. Rxd1 Bd7 19. Bd2) 15... Bd7 16. Qd1 Qxd1 17. Rxd1 {And now Nxc6 would win.} Rfd8 18. Nxc6 Bxc6 19. Bxc6 bxc6 20. Kf2 Bb4 21. Rxd8+ Rxd8 $14 {[%mdl 4096] Endgame KRB-KRB} 22. a3 Be7 23. Ke2 Bf6 24. Rb1 c5 25. b3 Kf8 26. Bd2 Rb8 27. Kd3 Rd8+ 28. Ke2 Rb8 29. e4 Ke8 30. Be3 Be7 $1 31. Kd3 Kd7 32. Kc4 Kc6 33. Rd1 ({White should try} 33. Bd2 $14) 33... a5 $1 $11 {The position is equal.} 34. Rd2 a4 35. bxa4 Ra8 36. Kb3 Rb8+ 37. Kc4 Ra8 38. Kb3 Rb8+ 39. Kc4 {Weighted Error Value: White=0.07/Black=0.04} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.16"]
[Round "9.1"]
[White "Dominguez Perez, Leinier"]
[Black "Robson, Ray"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2760"]
[BlackElo "2669"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,80,14,15,16,39,16,21,19,14,10,21,6,19,0,0,-8,-8,-5,25,-22,-25,-23,-22,-20,0,0,0,0,0,0,35,20,0,0,0,2,70,81,179,225,216,179,189,191,184,212,252,249,205,135,162,86,147,110,129,38,36,57,58,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. c3 O-O 6. a4 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} a6 7. Bg5 h6 8. Bh4 g5 9. Bg3 d6 10. Nbd2 Ba7 11. h4 g4 12. Nh2 Kg7 13. Qe2 {[#]} Qd7 $146 ({Predecessor:} 13... Ne7 14. h5 Nxh5 15. Nxg4 Nxg3 16. fxg3 Ng8 17. Ne3 Qg5 18. Nef1 Ne7 19. Nf3 Qg6 20. O-O-O f5 21. Bb3 b5 {½-½ (21) Eljanov,P (2702)-Fressinet,L (2651) Brest 2018}) 14. Nhf1 Nh5 15. Ne3 Bxe3 16. Qxe3 Ne7 17. f4 $1 f5 18. O-O $1 (18. fxe5 $2 f4 $17) 18... Ng6 19. exf5 $1 Ngxf4 20. Bxf4 exf4 21. Qd4+ Kh7 22. f6 $1 $36 {[%mdl 2048] Black must now prevent Rae1. White has the initiative.} Qf5 (22... Kg6 $1 $11) 23. Rae1 $1 $14 {[%cal Re1e7]} Qxf6 (23... Kg6 $16) 24. Qxf6 $18 Rxf6 25. Re7+ Kg6 26. Ne4 $1 {aiming for Bg8.} (26. Rxc7 $6 Ng3 $16) 26... Rf8 27. Rxc7 b5 28. Bd5 {[%cal Rd5a8]} (28. axb5 $6 axb5 29. Bd5 (29. Bxb5 Ba6 $16) 29... Ra6 $16) 28... Rb8 29. Nxd6 Ng3 30. Re1 (30. Nxc8 $6 Rbxc8 31. Rxc8 Rxc8 $11) (30. Bf7+ $1 $18 Rxf7 31. Rxf7 Nxf1 32. Kxf1) 30... bxa4 ({Black should play} 30... Kh5) 31. Bf7+ $16 Kf6 {[#]} 32. Ne8+ ({Better is} 32. Kh2 $1 $16 a3 33. bxa3 (33. Nxc8 Rbxc8 34. Re6+ {[%mdl 64] Double Attack} Kg7 $17)) 32... Rxe8 $1 $14 33. Bxe8 (33. Rxe8 $2 {is the wrong capture.} Rxb2 34. Ba2 (34. Rexc8 $2 Rb1+ 35. Kh2 Rh1#) 34... Rxa2 $19) 33... Be6 {[#]} 34. Bd7 (34. Rc6 $1 $14 Rxe8 35. Rxa6) 34... Bxd7 $11 {The position is equal.} 35. Rxd7 Rxb2 {KRR-KRN} 36. Rd6+ Kf5 {Hoping for ...Ne2+.} 37. Rd5+ (37. Rxh6 {gets mated.} f3 38. Rh5+ Nxh5 39. gxf3 gxf3 40. Re3 Rg2+ 41. Kf1 Ng3+ 42. Ke1 f2+ 43. Kd1 f1=Q+ 44. Re1 Qxd3+ {[%mdl 64] Double Attack} 45. Kc1 Qc2#) 37... Kf6 38. Rd6+ Kf5 {And now ...Ne2+ would win.} 39. Rd5+ (39. Rxh6 {leads to mate.} f3 40. Rh5+ Nxh5 41. gxf3 gxf3 42. Re3 Rg2+ 43. Kf1 Ng3+ 44. Ke1 f2+ 45. Kd1 f1=Q+ 46. Re1 Qxd3+ {[%mdl 64] Double Attack} 47. Kc1 Qc2#) 39... Kf6 40. Rd6+ Kf5 {Blacks defense is rewarded with a draw.  Weighted Error Value: White=0.12/Black=0.11} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.16"]
[Round "9.2"]
[White "Lenderman, Aleksandr"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "D76"]
[WhiteElo "2607"]
[BlackElo "2714"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,82,52,37,37,37,33,33,24,6,-6,0,0,52,23,94,83,90,19,13,6,8,8,41,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. Nc3 Nc6 6. Nf3 d5 7. cxd5 Nxd5 8. O-O Nb6 9. e3 e5 10. d5 e4 11. dxc6 Qxd1 12. Rxd1 exf3 13. Bxf3 bxc6 14. Bxc6 {D76: Fianchetto Grünfeld: Main Line with 7...Nb6.} Rb8 15. Nd5 {[#]} Bg4 $146 ({Predecessor:} 15... Nxd5 16. Bxd5 Bg4 17. f3 Be6 18. Bxe6 fxe6 19. Kg2 Bxb2 20. Rb1 {½-½ (20) Ilincic,Z (2515)-Fogarasi,T (2435) Budapest 2006}) 16. f3 {White is slightly better.} Be6 17. e4 Nc4 18. Nxc7 Bh3 (18... Nxb2 $11 19. Bxb2 Bxb2) 19. Bb5 Na3 {[#]} 20. Ba4 $1 $16 ({Much weaker is} 20. bxa3 Bxa1 21. a4 a6 $11) 20... Bxb2 {[#]} 21. Bxb2 (21. Bb3 $1 $16 Bxa1 22. Bxa3) 21... Rxb2 $11 22. Bb3 Rg2+ $1 23. Kh1 {White wants to play Nd5.} Rf2 24. Rd3 {And now Nd5 would win.} Nc4 {The position is equal.} 25. Bxc4 {Strongly threatening Bb3.} Rc8 26. Bxf7+ Kxf7 27. Rc3 Rb8 28. Nd5 Rbb2 29. Rc7+ Ke8 30. Nf4 (30. Rxa7 $2 {gets mated.} Rxh2+ 31. Kg1 Rbg2+ 32. Kf1 Rh1#) 30... Bd7 31. Rd1 Ba4 32. Rc8+ Ke7 33. Rc7+ Ke8 34. Rdc1 Bd7 35. h4 Rxf3 36. e5 {Black must now prevent e6.} Bf5 37. Rxa7 {aiming for e6.} Rxg3 38. Ra8+ Kd7 39. Ra7+ Ke8 40. Ra8+ Kd7 {( -> ...Be4+)} 41. Ra7+ Ke8 {Weighted Error Value: White=0.08/Black=0.11} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.16"]
[Round "9.3"]
[White "Caruana, Fabiano"]
[Black "Swiercz, Dariusz"]
[Result "1-0"]
[ECO "A29"]
[WhiteElo "2800"]
[BlackElo "2647"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,87,16,-14,25,25,28,14,20,30,20,20,34,22,44,42,51,46,58,54,85,65,97,93,85,52,104,83,122,120,127,139,138,124,124,134,125,111,99,105,93,84,99,94,77,62,62,58,66,61,68,72,65,47,72,70,137,128,177,67,308,306,293,293,347,391,748,718,943,1532,1508,1133,1668,1652,29990,29990,29991,29992,29992,29991]} 1. c4 Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Bg2 O-O 6. Nd5 Bc5 {A29: English Opening: Four Knights Variation with 4 g3.} 7. b4 $5 {[%mdl 4] An interesting side line.} Nxb4 8. Nxb4 Bxb4 {The position is equal.} 9. Nxe5 Re8 10. Nd3 {[#]} Ba5 $146 ({Predecessor:} 10... Bf8 11. O-O d5 12. cxd5 Nxd5 13. Bb2 c6 14. Ne5 Be6 15. d4 a5 16. e4 Nf6 {½-½ (23) Harika,D (2492)-Danielian,E (2417) Chess.com INT 2019}) 11. O-O c6 12. e3 d6 13. Nf4 Bf5 14. Bb2 Be4 15. Bh3 Rb8 16. d3 Bg6 17. Bg2 Bc7 (17... Bf5 $14) 18. a4 a6 19. e4 d5 20. cxd5 cxd5 21. Bxf6 ({Much less strong is} 21. exd5 $6 Bxf4 22. gxf4 Nxd5 $14) 21... Qxf6 22. Nxd5 {[%mdl 64] Double Attack} Qd8 23. h4 f6 24. Rc1 Bd6 25. Ne3 b5 26. axb5 axb5 27. Qg4 {Black must now prevent h5.} Bf8 28. Rfd1 b4 29. d4 b3 30. h5 Bf7 {Strongly threatening ...b2.} 31. d5 Kh8 32. Rb1 Bc5 (32... Rb4 $14) 33. Nf5 $16 {[%csl Gf5][%cal Rg4g7]} Rg8 34. Qf3 $40 {[%mdl 128] White is up to no good.} (34. h6 $1 $18 {[%cal Rh6g7]} gxh6 35. Qf3 (35. Nxh6 Bxf2+ 36. Kh1 Rxg4 $14)) 34... Rb4 $2 {A mistake that costs the game.} (34... Bxh5 $1 $14 35. Qxh5 g6) 35. h6 $18 ({Not} 35. Rxb3 Bxh5 $1 36. Qxh5 Rxb3 $17) 35... g6 36. Ng7 b2 37. e5 Bd4 $2 (37... fxe5 38. Qxf7 Rf8) 38. e6 Be8 {[#]} 39. Rxd4 $1 {[%mdl 512]} Rxd4 40. Rxb2 Ba4 41. Rb7 f5 42. Nxf5 {White mates.} Rd1+ 43. Kh2 Qf6 44. Nd6 {Weighted Error Value: White=0.07/Black=0.48} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.16"]
[Round "9.4"]
[White "So, Wesley"]
[Black "Naroditsky, Daniel"]
[Result "1/2-1/2"]
[ECO "C55"]
[WhiteElo "2778"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "62"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,62,46,35,43,25,40,40,19,29,46,45,36,45,12,0,2,25,25,22,-33,-29,-22,0,0,0,0,0,0,0,0,0,0,0,0,79,48,196,188,152,10,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 h6 5. c3 g5 6. d4 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack.} d6 7. dxe5 dxe5 {[#]} 8. Qe2 $146 {White is slightly better.} (8. Qxd8+ {keeps more tension.} Nxd8 9. h4 g4 10. Nxe5 Bd6 11. Nd3) ({Predecessor:} 8. Qxd8+ Nxd8 9. Nxe5 Nxe4 10. O-O Nd6 11. Bb3 Be6 12. Re1 Bg7 13. f4 O-O 14. fxg5 Bxb3 15. axb3 hxg5 {½-½ (37) Karjakin,S (2752)-Oparin,G (2652) Chess.com INT 2020}) 8... Bd6 9. h4 g4 10. Nh2 Qe7 11. Nf1 Nh5 12. Ne3 Nf4 13. Qf1 Be6 14. g3 {[#]} (14. Nd5 $11 Bxd5 15. exd5) 14... O-O-O $1 $15 15. Nd5 Bxd5 (15... Qd7 {with more complications.} 16. Nf6 Bxc4 17. Qxc4 Na5 18. Nxd7 Nxc4 19. gxf4 Kxd7 20. b3 Nb6) 16. exd5 Na5 17. gxf4 exf4+ 18. Kd1 Nxc4 19. Qxc4 g3 20. fxg3 ({Not} 20. Bxf4 $2 g2 $19) 20... fxg3 21. Re1 Qf6 (21... Qd7 $11 22. Be3 Qf5) 22. Nd2 $16 Kb8 {[#]} ({Black should try} 22... Rhg8 $14 23. Ne4 Qf5) 23. Ne4 $1 $18 {[%cal Re4f6]} Qf5 24. Be3 (24. Nxd6 $16 Rxd6 25. Bf4 Rxd5+ 26. Kc1) 24... Rhe8 $11 {The position is equal.} 25. Nxd6 Rxd6 26. Bxa7+ {[%mdl 64] Decoy} Kxa7 27. Qa4+ Kb6 28. Qb4+ Ka6 $1 29. Qa4+ Kb6 {( -> ...Qd3+)} 30. Qb3+ Ka7 31. Qa4+ {[%mdl 64] Double Attack} (31. Rxe8 $2 {loses.} Rxd5+ 32. Kc1 Qf1+ 33. Kc2 Qf2+ 34. Kb1 {[#]} g2 $1 $19 {[%mdl 512]}) 31... Kb6 {Weighted Error Value: White=0.16/Black=0.21} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.16"]
[Round "9.5"]
[White "Burke, John M"]
[Black "Sevian, Samuel"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2554"]
[BlackElo "2654"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,89,19,19,8,0,0,9,0,0,0,7,6,9,0,8,-5,19,0,0,7,12,0,4,-19,-16,-25,-4,0,0,0,22,0,0,0,0,0,0,0,6,7,10,30,29,0,0,14,104,-66,-69,-65,-64,-60,-50,-62,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. c3 a6 7. Bb3 O-O 8. h3 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} h6 9. Re1 Re8 {The modern move.} 10. Nbd2 {[%cal Bb1d2,Bd2f1,Bf1e3,Be3f5][%mdl 32]} Be6 11. Bxe6 Rxe6 12. b4 Ba7 13. Qc2 Ne7 14. Nf1 {[#]} Ng6 $146 ({Predecessor:} 14... d5 15. Rb1 dxe4 16. dxe4 c5 17. b5 axb5 18. Rxb5 Nc8 19. c4 Nd6 20. Rb3 Bb8 {½-½ (43) Buecker,J (2578)-Langeveld,R (2696) ICCF email 2010}) 15. Be3 Bxe3 16. Nxe3 c6 17. c4 d5 18. Rad1 d4 19. Nf5 a5 20. a3 axb4 21. axb4 Ra3 22. Ra1 Rc3 23. Qd2 Nf4 24. Nxe5 N6h5 25. g3 $1 {[%cal Rg3f4]} Nxh3+ 26. Kg2 $1 Nxf2 $1 {[#]} 27. Nxf7 Kxf7 28. Qxf2 {Threatens to win with Nd6+.} Kg8 29. Rh1 (29. Nxd4 $2 Rg6 $19) 29... Nf6 (29... Qg5 $1 $11) 30. Rhd1 $2 ({Worse is} 30. Qxd4 Rxd3 31. Qxd8+ Rxd8 $17) ({Don't blunder} 30. Nxd4 $2 Rd6 $19) (30. Nxh6+ $16 gxh6 31. Qf5) 30... Ng4 $1 $15 {[%cal Rg4f2]} 31. Qxd4 Qxd4 32. Nxd4 Rd6 33. Nf5 Rdxd3 (33... Rd7 $1 $15 34. Ra8+ Kh7) 34. Rxd3 $11 {The position is equal.} Rxd3 $15 {[%mdl 4096] Endgame KRN-KRN} 35. Ra8+ Kf7 36. Rb8 g6 37. Rxb7+ Kf6 38. Ne7 Rd2+ 39. Kg1 Ne5 40. Nxc6 Nf3+ ({Of course not} 40... Nxc6 $6 41. Rb6 $16) 41. Kf1 Nh2+ 42. Ke1 Nf3+ 43. Kf1 Nh2+ 44. Ke1 $1 Nf3+ 45. Kf1 {Weighted Error Value: White=0.11/Black=0.06} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.16"]
[Round "9.6"]
[White "Bruzon Batista, Lazaro"]
[Black "Xiong, Jeffery"]
[Result "0-1"]
[ECO "C07"]
[WhiteElo "2645"]
[BlackElo "2700"]
[Annotator "TA"]
[PlyCount "104"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,104,14,20,19,20,22,27,8,9,0,0,5,16,7,12,17,24,20,34,12,49,-25,11,-11,0,0,0,-11,-17,-41,0,0,0,0,-3,-1,-8,0,0,0,16,0,0,0,6,0,0,0,0,0,0,0,18,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,9,-8,-11,-16,-15,-44,-14,-60,-59,-79,-87,-195,-88,-77,0,-599,-39,-617,-631,-29988,-29989,-29989,-29990,-29993,-29994,-29994,-29995,-29995,-29996]} 1. e4 e6 2. d4 d5 3. Nd2 c5 4. exd5 Qxd5 5. dxc5 Qxc5 (5... Bxc5 {seems wilder.} 6. Ngf3 Nf6 7. Bc4 Qh5 8. Qe2 Be7) 6. Ngf3 {C07: French Tarrasch: 3...c5, 4 Ngf3 and 4 exd5 Qxd5.} Nf6 7. Bd3 Nbd7 8. O-O {White has an edge.} Qc7 9. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Be7 10. Nb3 {10.a5 injects fresh life into this line.} O-O 11. a5 Nd5 12. c3 Rd8 {[#]} 13. Re1 $146 ({Predecessor:} 13. Qe2 N7f6 14. Nbd4 Bd7 15. a6 bxa6 16. Bxa6 Bd6 17. g3 e5 18. Nb5 Bxb5 19. Bxb5 {1-0 (44) Tiviakov,S (2580)-Looshnikov,N (2424) Voronezh 2018}) 13... a6 14. Qc2 N7f6 15. Nbd4 (15. Ra4 $14) 15... h6 16. Bf1 Bd7 17. g3 Bc5 18. Nb3 Ba7 19. Ne5 Nb4 20. Qb1 Nc6 21. Nxd7 Rxd7 22. Bf4 Qd8 23. Be3 Bxe3 24. Rxe3 Ng4 25. Re2 Qg5 26. h3 Nge5 27. Re3 {[#] Strongly threatening f4.} Ng6 28. Qe4 Rd5 29. h4 Qf6 30. Bg2 Rad8 31. Qc2 R5d6 32. Re2 Nge5 33. Nc5 Nf3+ 34. Bxf3 Qxf3 35. Nxb7 Nd4 36. cxd4 Qxb7 37. Rd2 Qd5 (37... Rc6 {with more complications.} 38. Qd3 Qb4 39. Rc2 Rxc2 40. Qxc2 Rb8) 38. b4 e5 39. Qd3 Qb7 {[%cal Rd6d4]} 40. Qb3 exd4 41. Rb1 g5 {Black wants to play ...gxh4.} 42. hxg5 hxg5 43. b5 Re8 {...Rh6 is the strong threat.} 44. Qd1 (44. Rf1 $17) 44... Qe4 (44... Rh6 $19 {[%csl Gb7][%cal Rh6h1] is more deadly.} 45. f3 Qc7) 45. f3 $17 {[#]} Qe5 (45... Qe3+ $1 $17 46. Rf2 d3) 46. Kg2 $2 {[%mdl 8192]} (46. b6 $11 {and White stays safe.}) 46... axb5 $2 ({Black should try} 46... Rh6 $19 47. Rf2 Qf5) 47. Rdb2 $2 {[%mdl 8192] This costs White the game.} (47. Rb4 $15) 47... Rh6 $19 {White must now prevent ...Qh8.} 48. Rxb5 Qh8 {Black mates.} 49. Rxg5+ Kf8 50. g4 Rh2+ 51. Kg3 Rh3+ 52. Kg2 Qh4 {Weighted Error Value: White=0.43/Black=0.25} 0-1

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.17"]
[Round "10.1"]
[White "Swiercz, Dariusz"]
[Black "Bruzon Batista, Lazaro"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "2647"]
[BlackElo "2645"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,83,32,16,7,27,1,5,8,0,-27,17,15,39,39,43,45,43,48,59,59,61,46,54,52,68,54,98,94,146,71,98,66,89,86,129,129,162,162,206,206,222,222,224,224,224,206,197,181,181,181,362,234,234,231,243,225,257,251,286,286,389,355,388,327,331,318,309,282,232,147,416,412,2255,1933]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. c5 {D37: Queen's Gambit Declined: 5 Bf4.} Ne4 8. h4 $5 {[%mdl 4] Exploring less charted territory.} f5 9. Be2 {The position is equal.} c6 10. Qc2 {[#]} Qe8 $146 ({Predecessor:} 10... b6 11. cxb6 axb6 12. Nxe4 fxe4 13. Ng5 Bb4+ 14. Kf1 e5 15. dxe5 Nc5 16. a3 h6 {1-0 (47) Nagy,G (2478)-Firouzja,A (2728) Chess.com INT 2020}) 11. Ne5 Bf6 12. Nxd7 Bxd7 13. f3 Nxc3 14. Qxc3 Rf7 15. Bd6 Qd8 16. h5 b6 17. f4 Be8 18. g4 Rd7 19. g5 Be7 {[#]} ({Better is} 19... bxc5 20. Bxc5 (20. gxf6 Rxd6 21. fxg7 cxd4 $14) 20... Be7) 20. Bxe7 (20. Be5 $142 $1) 20... Rxe7 21. Ba6 Rb8 22. b4 Rc7 23. h6 g6 24. Kf2 b5 25. a4 Qe7 26. Qd3 Bd7 27. Rhc1 Qe8 28. Ra3 Kf8 29. Qc2 Qe7 30. Qe2 Be8 $2 {[#]} (30... Qe8 31. axb5 cxb5) 31. Rc2 Bd7 32. Qf1 Be8 33. Qc1 Qd7 34. Rac3 Qe7 ({Don't play} 34... bxa4 $6 35. Qa3 $16) 35. Qa3 Qd8 36. axb5 cxb5 37. c6 Rb6 {[%cal Rc7c6]} 38. Bb7 Qb8 39. Qa5 Ke7 40. Rc5 Kf8 $2 {[%mdl 8192]} (40... Kd6 $16 {keeps fighting.} 41. Ra2 Bxc6 42. Bxc6 Rbxc6) 41. Rxb5 $18 Rcxb7 (41... Bxc6 $142 42. Rxb6 axb6 43. Qxb6 Qxb7 44. Qxb7 Rxb7) 42. cxb7 {Weighted Error Value: White=0.12/Black=0.32} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.17"]
[Round "10.2"]
[White "Sevian, Samuel"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2654"]
[BlackElo "2778"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,59,0,6,8,8,8,14,8,8,3,1,7,25,15,27,21,21,19,17,9,62,64,66,63,80,72,110,56,55,37,43,44,43,56,113,7,15,27,20,0,89,83,84,81,84,0,0,0,101,0,0,0]} 1. d4 Nf6 2. Nf3 d5 3. Bf4 c5 4. e3 e6 5. c3 Bd6 6. Bb5+ {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Nc6 7. Bxc6+ $1 {[%mdl 4] outshines the older 7.Ne5.} bxc6 8. Bxd6 Qxd6 9. Qa4 O-O 10. Qa3 Ne4 11. Nfd2 {[#]} e5 $146 ({Predecessor:} 11... cxd4 12. Nxe4 Qxa3 13. Nxa3 dxe4 14. cxd4 Rb8 15. b3 c5 16. dxc5 Ba6 17. Rc1 Rfd8 {1-0 (46) Aronian,L (2781)-So,W (2770) chess24.com INT 2021}) 12. Nxe4 dxe4 13. Qxc5 Qg6 {[%cal Rg6g2]} 14. Nd2 exd4 (14... Qxg2 $11 15. O-O-O Qxf2) 15. Qxd4 $14 Re8 16. O-O-O Ba6 {[#]} 17. c4 $1 Qe6 18. Qc5 (18. b3 $16) 18... Rad8 19. b3 ({Of course not} 19. Qxa7 Bxc4 20. Nxc4 Qxc4+ 21. Kb1 Ra8 $17) 19... Bc8 $1 20. Nb1 Qf6 21. Qa5 h5 ({Black should try} 21... Bg4 $14 22. Rxd8 Rxd8) 22. Rd2 (22. Nc3 $16) 22... Rxd2 $11 23. Qxd2 Qg5 24. Rg1 Qe5 (24... Rd8 $11 {keeps the balance.} 25. Qe1 Rd3) 25. h3 $16 Qh2 26. Qd1 Qe5 27. Qd4 Qh2 28. Qd1 Qe5 29. Qd4 (29. Kc2 $16) 29... Qh2 $11 30. Qd1 {Weighted Error Value: White=0.19/Black=0.14} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.17"]
[Round "10.3"]
[White "Robson, Ray"]
[Black "Burke, John M"]
[Result "1/2-1/2"]
[ECO "C92"]
[WhiteElo "2669"]
[BlackElo "2554"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 30,107,10,4,14,16,16,18,0,0,0,-44,-28,-40,-38,-29,-31,-39,-48,-54,-49,-31,-39,-37,-54,-45,-48,-38,-39,-41,-43,-42,-45,-37,-56,-55,-32,-53,-50,-55,-63,-43,-17,-27,-13,-17,-8,-8,-8,-8,-8,-8,0,-8,-8,-13,-13,-19,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,8,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. c3 O-O 9. h3 Bb7 10. Nbd2 Na5 11. Bc2 c5 12. Re1 Re8 13. Nf1 h6 14. Ng3 Bf8 15. d4 cxd4 16. cxd4 exd4 {C92: Closed Ruy Lopez: 9...Be6, Karpov and Flohr-Zaitsev Variations.} 17. Nxd4 Qc7 18. Bf4 Nc4 19. Ndf5 Nxb2 {[#]} 20. Qc1 $146 ({Predecessor:} 20. Qd4 Qxc2 21. Rac1 Qa4 22. Qxb2 Bxe4 23. Nxh6+ Kh7 24. Nxf7 Bxg2 25. Bxd6 Bd5 26. Rxe8 Rxe8 27. Qb1+ Kg8 28. Nh6+ Kh8 29. Qg6 Bxd6 {½-½ (29) Priepke,W (2473)-Millstone,M (2441) ICCF email 2012}) 20... Nc4 21. Bxh6 gxh6 22. Nxh6+ Bxh6 23. Qxh6 Re6 $1 24. Nf5 {[%csl Gf5][%cal Rh6g7] [#]} Ne8 25. Qg5+ Kf8 $1 {White must now prevent ...Qd8.} 26. Qh4 {[%cal Rh4h8]} Rg6 27. Qh8+ Rg8 28. Qh6+ Ng7 29. Bb3 Re8 {[#] ...Re6 is the strong threat.} 30. Bxc4 bxc4 31. Qxd6+ Qxd6 32. Nxd6 Re7 33. Rab1 Bc6 34. Rb6 Bb5 35. a4 Bxa4 {Strongly threatening ...Bb5!} 36. Rxa6 Bb3 37. Rc6 {The position is equal.} Re6 {Threatens to win with ...Ne8.} 38. Rc8+ Ne8 39. Nxc4 Bxc4 40. Rxc4 Rg5 41. Re3 Nd6 42. Rd4 Rc5 43. g4 Rc4 44. Rxc4 Nxc4 $11 {[%mdl 4096] Endgame KRN-KR} 45. Re2 Nd6 46. f3 f5 47. e5 fxg4 48. hxg4 Nf7 49. f4 Rg6 50. Rg2 Re6 51. Re2 Rg6 52. Rg2 Re6 53. Re2 Rg6 54. Rg2 {Weighted Error Value: White=0.03/Black=0.03} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.17"]
[Round "10.4"]
[White "Lenderman, Aleksandr"]
[Black "Caruana, Fabiano"]
[Result "0-1"]
[ECO "E62"]
[WhiteElo "2607"]
[BlackElo "2800"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,118,38,36,27,23,31,28,19,25,14,0,0,10,-12,4,-8,0,-33,-35,-29,-33,-27,-8,-27,0,-12,-3,-31,0,0,0,-23,0,0,0,0,0,-23,-16,-19,-26,-138,0,0,-3,0,0,0,72,81,63,76,81,85,63,0,139,46,46,55,58,55,94,0,0,-64,0,-48,-45,-183,-184,-289,-199,-357,-136,-370,-329,-487,-487,-662,-647,-624,-594,-617,-603,-937,-468,-1243,-1171,-1079,-466,-29980,-29981,-29989,-29979,-29981,-29982,-29982,-2703,-29983,-29984,-29983,-29984,-29984,-29985,-29985,-29985]} 1. d4 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 d6 5. Nc3 O-O 6. Nf3 c6 7. O-O Bf5 8. Ng5 {8.Ne1 is setting a new trend. E62: King's Indian: Fianchetto: 6...c6 and Panno Variation (6...Nc6) without ...a6.} e5 9. d5 a5 10. e4 {[#] White has an edge.} Bc8 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 10... Bg4 11. Qb3 Na6 12. Be3 Qc8 13. Rac1 h6 14. Nf3 Bh3 15. Bb6 Bxg2 16. Kxg2 Nd7 {0-1 (72) Jumabayev,R (2637)-Perez Ponsa,F (2554) Chess.com INT 2021}) 11. h3 cxd5 12. cxd5 Na6 13. Be3 Bd7 14. a4 Rc8 15. Nf3 {[#]} Rxc3 $1 {[%mdl 64] Remove Defender} 16. bxc3 Nxe4 17. Qc2 Nec5 18. Nd2 Qc7 19. Ra3 f5 20. f4 Re8 21. fxe5 Bxe5 22. Bf2 b5 23. axb5 Bxb5 24. Rfa1 Nd3 25. Qb1 {[#]} Nab4 $1 {[%mdl 64] Pin} 26. Rxa5 Qxc3 27. Be3 (27. Nf3 $11 {was the only way to keep the balance.}) 27... Bd4 28. Bxd4 $11 Qxd4+ {[%mdl 64] Double Attack} (28... Re1+ $6 29. Kh2 $16) 29. Kh2 f4 30. g4 (30. Rxb5 fxg3+ 31. Kh1 Nf2+ 32. Kg1 Nd1+ 33. Kh1 Re1+ 34. Bf1 g2+ 35. Kxg2 Qxd2+ 36. Be2 Qxe2+ 37. Kg3 Rg1+ 38. Kh4 Qh5#) 30... Re2 31. Ra8+ $1 $16 Be8 {[#]} 32. Qg1 Qb2 33. Nf3 Kf8 ({Of course not} 33... Nxd5 34. Qf1 $16) 34. R1a7 (34. Rd1 $14) 34... h6 {[#]} (34... Nc2 $11 35. Ra2 (35. Rxh7 $2 Nce1 $19) (35. Ng5 f3 $11 {[%mdl 64] Pin}) 35... Qc3) 35. Rb7 (35. g5 $1 $16 {[%cal Rg5h6]} hxg5 36. Nxg5) 35... Ne5 $1 $14 {( -> ...Rxg2+!)} 36. Kh1 Nxf3 37. Bxf3 Re5 {[#]} 38. Rc8 ({White should try} 38. Qa1 $1 $16 Qxa1+ 39. Rxa1) 38... Qd2 $11 {Threatens to win with ...Re1.} 39. Rc1 (39. Qg2 $1 $11 Qe1+ 40. Kh2) 39... Re3 $40 {[%mdl 128] Black mounts an attack.} (39... Nd3 $1 $15 40. Rf1 Re3) 40. Rf1 Nd3 {[%mdl 1024] Strongly threatening ...Nc5. Black has compensation.} 41. Qg2 (41. Rb3 $15) 41... Qc3 $19 {...Ne5 is the strong threat.} 42. Qh2 (42. g5 {was the only defense.} Ne1 43. Qg4) 42... g5 43. Bg2 $2 (43. h4 {only move.} Rxf3 44. Rxf3 Qe1+ {[%mdl 64] Double Attack} 45. Qg1) 43... Ne5 $2 (43... Kg8 $19 {is more deadly. Hoping for ...Ne1.} 44. Rf3 Re1+ 45. Bf1 Bf7) 44. Rbb1 $2 {This move loses the game for White.} (44. h4 $17 Nxg4 45. Rxf4+ gxf4 46. Qxf4+ Qf6 47. Qxg4) 44... Bf7 {aiming for ...f3.} 45. Rbc1 (45. Rxf4 $142 gxf4 46. Qxf4) 45... Qd4 46. Rcd1 Nd3 47. Rd2 Kg7 48. h4 Qc4 49. Rfd1 Ne5 (49... f3 $142 50. Bxf3 Rxf3 51. Rxd3 Rxd3 52. Rxd3 Qxd3 53. Qb2+ Kh7) 50. hxg5 (50. Rd4 $142 Qc3 51. hxg5 hxg5 52. Rxf4 gxf4 53. Qxf4) 50... hxg5 51. Rd4 Qc3 (51... Qb3 $142 52. Bf1 Nxg4) 52. Qg1 (52. Rxf4 $19 gxf4 53. Qxf4) 52... Nxg4 53. R1d2 Qc8 54. Qa1 Qh8+ 55. Kg1 Qh2+ 56. Kf1 {[#]} Rf3+ $1 {[%mdl 576] Clearance. Black mates.} 57. Bxf3 Ne3+ 58. Ke1 Qg1+ 59. Ke2 Qxa1 {Weighted Error Value: White=0.59/Black=0.35} 0-1

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.17"]
[Round "10.5"]
[White "Xiong, Jeffery"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "D27"]
[WhiteElo "2700"]
[BlackElo "2760"]
[Annotator "TA"]
[PlyCount "68"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,68,21,16,22,12,12,11,11,6,14,5,19,7,15,18,37,7,29,16,11,2,16,23,25,10,0,9,25,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O c5 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 11. Be2 Bb7 12. Rc1 Qd7 13. N2f3 Bd6 14. a4 bxa4 15. bxa4 Rd8 {[#]} 16. a5 $146 ({Predecessor:} 16. Nd2 Nc6 17. Nc4 Bc7 18. Qb3 Rab8 19. Rfd1 Nxd4 20. Rxd4 Bd5 21. Qa3 Ne4 22. f3 {½-½ (44) Kienel,N (2156)-Mager,F (2221) ICCF email 2017}) 16... Qe8 17. Qb3 Bd5 18. Bc4 Nc6 19. Nxc6 Bxc6 20. Bxf6 gxf6 21. Nd4 {[%cal Rc4e6]} Be4 22. Qb2 Be5 {The position is equal.} 23. Qe2 Bxd4 24. exd4 Rxd4 25. Qg4+ Kf8 26. Rfe1 Qa4 27. Bxe6 $1 ({Avoid the trap} 27. Rxe4 $2 {[#]} f5 $1 $19 {[%mdl 512]}) 27... Bd5 28. Qf5 {[%mdl 64] [#] Double Attack} Bxe6 ({Not} 28... fxe6 29. Qxf6+ Ke8 30. Rc7 Qd7 31. Qh8+ Kf7 32. Rxd7+ Kg6 33. Qg7+ Kh5 34. Re5+ Kh4 35. Qg5#) 29. Qxf6 Kg8 {Hoping for ...Rg4.} 30. Qg5+ Kf8 31. Qh6+ Kg8 {White must now prevent ...Bf5.} 32. Qg5+ Kf8 {Strongly threatening ...Rg4.} 33. Qh6+ Kg8 {Threatens to win with ...Rg4.} 34. Qg5+ Kf8 {A rather calm draw.  Weighted Error Value: White=0.04/Black=0.01} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.17"]
[Round "10.6"]
[White "Shankland, Sam"]
[Black "Naroditsky, Daniel"]
[Result "1-0"]
[ECO "E43"]
[WhiteElo "2714"]
[BlackElo "2623"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,115,29,0,4,8,11,17,16,12,19,13,21,0,0,0,0,0,0,0,27,14,15,25,27,15,15,11,14,14,13,14,23,10,20,19,29,18,22,23,28,28,30,23,23,22,20,20,19,18,20,23,40,33,57,32,43,39,42,17,46,50,101,86,147,144,132,127,168,143,188,191,191,191,189,180,188,177,181,189,733,726,693,673,11089,12848,6540,7255,29944,1577,29961,29961,12849,29955,6491,6097]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 b6 5. e3 Bb7 6. Bd3 c5 7. O-O cxd4 8. exd4 O-O 9. Na4 Be7 10. a3 d6 11. b4 Nbd7 12. Bb2 Rc8 {E43: Nimzo-Indian: Rubinstein: 4...b6.} 13. Re1 Re8 14. Nc3 Bf8 {The position is equal.} 15. Bf1 a6 {[#]} 16. Nd2 $146 ({Predecessor:} 16. Rc1 g6 17. Nd2 Bg7 18. Nb3 Qc7 19. a4 Qb8 20. Ba3 d5 21. c5 e5 22. cxb6 exd4 23. Rxe8+ Nxe8 24. Nxd4 Nxb6 {½-½ (30) Fahnenschmidt,G (2360)-Hecht,H (2475) Germany 1981}) 16... Rc7 17. a4 d5 18. c5 bxc5 19. bxc5 e5 20. dxe5 Nxe5 {[#] And now ...Nfg4 would win.} (20... Rxe5 {feels hotter.} 21. Rxe5 Nxe5 22. Nb5 Neg4 23. Nxc7 Bxc5 24. Ne4 Nxe4 25. Qxg4 g6) 21. Nb5 $1 axb5 22. Bxe5 Rce7 23. Bxf6 {[%mdl 64] Discovered Attack} Rxe1 24. Bxd8 Rxd1 25. Rxd1 Rxd8 26. Bxb5 Bxc5 27. Nb3 Ba7 28. Na5 Ba8 29. Nc6 Bxc6 30. Bxc6 $11 {[%mdl 4096] Endgame KRB-KRB} d4 31. Bb5 Rc8 32. Bd3 Kf8 33. a5 (33. Bxh7 $2 g6 $19) 33... Rc3 34. Kf1 ({But not} 34. Bxh7 $2 g6 $19) 34... Ke7 35. a6 ({Of course not} 35. Bxh7 g6 $15) 35... Kd6 36. Ke2 Rb3 37. Rd2 g6 38. h4 Rb4 39. h5 gxh5 40. Bxh7 Rb8 41. Bd3 h4 {White now steadily converts the win.} ({Black should try} 41... Rb4 $14) 42. Kf3 $16 Rh8 (42... Rg8 $142) 43. Kg4 $1 Rg8+ {[#]} 44. Kh3 $1 f6 45. Rb2 Rg7 46. Rb5 Rc7 {[#] Threatens to win with ...Rc3.} 47. Rf5 $1 ({Much less strong is} 47. Kxh4 $6 Rc3 $16) 47... Ke6 48. Kxh4 Rc3 49. Rf3 Kf7 50. Kg4 Rc5 $2 (50... Bb8 51. Kf5 Rc5+ 52. Ke4 Ke6 53. Kxd4 Rg5) 51. Rh3 $18 Rg5+ 52. Kf3 Rg7 53. Rh7 Rxh7 54. Bxh7 Ke6 55. Bd3 f5 56. Kg3 Kf6 57. f4 Bb8 58. Kf3 {Weighted Error Value: White=0.04/Black=0.41} 1-0

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.18"]
[Round "11.1"]
[White "Bruzon Batista, Lazaro"]
[Black "Lenderman, Aleksandr"]
[Result "1/2-1/2"]
[ECO "A05"]
[WhiteElo "2645"]
[BlackElo "2607"]
[Annotator "TA"]
[PlyCount "253"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,253,22,35,42,51,50,38,39,50,42,47,39,56,8,11,6,15,4,6,7,17,0,8,0,0,0,0,0,8,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,10,4,12,8,12,14,16,14,24,0,0,0,0,0,0,0,15,12,23,23,44,42,51,34,45,8,16,10,37,34,39,16,14,0,36,41,40,8,123,31,32,8,8,8,87,87,87,87,88,87,87,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,22,0,18,0,0,0,0,0,0,0,0,0,0,0,108,86,108,108,120,120,120,120,120,120,120,120,120,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. g3 b5 3. e3 a6 4. b3 Bb7 5. c4 bxc4 6. bxc4 {A05: Réti Opening: 1 Nf3 Nf6.} g6 7. Nc3 Bg7 8. Rb1 {White is slightly better.} Ra7 9. Bg2 O-O 10. O-O c5 {[#]} 11. Bb2 $146 ({Predecessor:} 11. d3 d6 12. Bd2 Nbd7 13. Qc2 Bc6 {½-½ (13) Badea,B (2530)-Vasiesiu,D (2440) Targoviste 2001}) 11... d6 12. Ba1 Nbd7 13. d3 Qc7 14. Qc2 Rb8 15. Rb3 Bc6 16. Rfb1 Rab7 17. h3 Rxb3 18. Rxb3 Rb6 19. Rxb6 Nxb6 20. Nb1 Qb7 21. Nbd2 Nbd7 22. Qb3 Qa8 23. Bc3 Ne8 24. Bxg7 Nxg7 25. Ne1 Bxg2 26. Nxg2 Ne6 27. f4 Nf6 28. Ne1 Ng7 29. Nef3 Qc8 30. Kg2 Nf5 31. Nf1 Nd7 32. Qb2 Ng7 33. e4 (33. N1d2 {feels hotter.} f5 34. e4 Qb8 35. Qa3 Qb7 36. Qb3) 33... Qb8 34. Qxb8+ Nxb8 $11 {[%mdl 4096] Endgame KNN-KNN} 35. Ne3 Nc6 36. Nd5 Ne8 37. Kf2 Kf8 38. Ke3 Na5 39. e5 Nc6 40. a3 f6 41. exd6 exd6 42. g4 Kf7 43. Ke4 Ne7 {Threatening ...f5+.} 44. Nxe7 Kxe7 $14 {KN-KN} 45. d4 Nc7 46. dxc5 dxc5 47. f5 Kd6 (47... gxf5+ $11 48. Kxf5 Ne8) 48. h4 (48. g5 $16) 48... Ne8 49. g5 fxg5 50. hxg5 Ng7 (50... gxf5+ $11 {remains equal.} 51. Kxf5 a5) 51. Nh4 $1 $16 Nxf5 52. Nxf5+ gxf5+ 53. Kxf5 {K3P-K3P} Ke7 {[#]} 54. Ke5 (54. a4 $1 $16) 54... Kf7 $1 $11 55. Kd5 Kg6 56. Kxc5 Kxg5 {KPP-KPP} 57. Kb6 h5 58. c5 h4 59. c6 h3 60. c7 h2 61. c8=Q h1=Q {KQ-KQ} 62. Qc5+ Kf4 63. a4 Qa8 ({Inferior is} 63... Qh6+ 64. Kb7 $18) 64. Qd6+ Ke4 65. a5 Kf5 66. Qe7 Qc8 67. Qb7 (67. Qf7+ {feels hotter.} Ke4 68. Qf6 Kd3 69. Qf1+ Kd4 70. Qxa6 Qd8+ 71. Kb5) 67... Qe6+ 68. Ka7 Qd6 {[#]} (68... Qc4 $11) 69. Qb6 $1 $16 {[%cal Rb6d6]} Qa3 70. Kxa6 ({Don't play} 70. Qxa6 $6 Qe7+ 71. Qb7 Qe3+ 72. Ka6 Qd4 $18) 70... Kg4 71. Qd4+ Kh3 72. Kb5 Qb3+ 73. Qb4 Qd5+ 74. Ka4 Kh2 75. a6 ({White should play} 75. Qf4+ $16 Kh3 76. Qe3+ Kh2 77. Qh6+ Kg3 78. Qg7+ Kf4 79. Qf8+ Kg5 80. Qe7+ Kf5 81. a6 Qd1+ 82. Kb5 Qd3+ 83. Kb6 Qb3+ 84. Ka7) 75... Qa2+ {The position is equal.} (75... Qd1+ {seems wilder.} 76. Ka5 Qa1+ 77. Kb5 Qf1+ 78. Kb6 Qf6+) 76. Kb5 Qd5+ 77. Qc5 Qb3+ 78. Kc6 Qa4+ 79. Kb7 (79. Kd5 {feels hotter.} Qxa6 80. Qf2+ Kh1 81. Qf3+ Kg1 82. Qg3+) 79... Qb3+ 80. Qb6 (80. Kc6 {is more complex.}) 80... Qd5+ 81. Qc6 (81. Ka7 {seems wilder.} Kg3 82. Kb8 Qg8+ 83. Kc7 Qf7+ 84. Kb8) 81... Qb3+ 82. Kc8 (82. Ka7 {keeps more tension.} Qh3 83. Kb8 Qb3+ 84. Kc8 Qh3+ 85. Kb8) 82... Qg8+ 83. Kc7 Qf7+ (83... Qg7+ {looks sharper.} 84. Kb8 Qf8+ 85. Ka7 Qf2+ 86. Kb8 Qf8+) 84. Qd7 (84. Kb6 {with more complications.} Qf2+ 85. Kb7 Qb2+ 86. Qb6 Qg2+ 87. Qc6) 84... Qc4+ 85. Qc6 (85. Kb6 {is more complex.} Qb3+ 86. Kc5 Qa3+ 87. Kb5 Qb2+ 88. Ka5) 85... Qf7+ 86. Kd6 Qf6+ 87. Kd5 Qf3+ (87... Qf7+ {seems wilder.} 88. Kd6) 88. Kc5 Qe3+ (88... Qa3+ {with more complications.} 89. Kb6 Qb3+ 90. Ka5 Qa3+ 91. Kb5 Qb2+) 89. Kd6 Qf4+ (89... Kg3 {with more complications.} 90. Kc7 Qa7+ 91. Kd8 Kf2 92. Qe4 Qxa6 93. Qh4+ Kf1) 90. Ke6 (90. Kc5 {keeps more tension.} Qe3+) 90... Qh6+ 91. Kd7 Qg7+ 92. Kd6 Qf6+ (92... Qd4+ {is interesting.} 93. Kc7 Qg7+ 94. Kb8 Qf8+ 95. Ka7 Qh8) 93. Kc7 (93. Kc5 {keeps more tension.} Qf5+ 94. Kb4 Qf4+ 95. Kb3 Qe3+ 96. Kb4) 93... Qe7+ (93... Qf7+ {with more complications.}) 94. Kc8 (94. Kb8 {seems wilder.} Qb4+ 95. Qb7 Qf8+ 96. Qc8 Qb4+ 97. Ka8) 94... Qf8+ 95. Kb7 Qb4+ 96. Qb6 (96. Ka7 {is interesting.} Kg3 97. Ka8 Kf2 98. Qc2+ Kg1 99. Qg6+) 96... Qe4+ 97. Ka7 Kh3 98. Qd6 Qe3+ (98... Qb1 {looks sharper.} 99. Qb8 Qg1+ 100. Kb7 Qg2+ 101. Kc8 Qc2+) 99. Kb7 Qb3+ (99... Qe4+ {keeps more tension.} 100. Kb6 Qe3+ 101. Ka5 Kg2 102. Qc6+ Kf1) 100. Kc7 (100. Kc6 {is interesting.} Qa4+ 101. Kc7 Qc4+ 102. Kb7 Qb3+) 100... Qc4+ (100... Qa2 {seems wilder.} 101. Qd7+ Kh2 102. Kd8 Qxa6 103. Qh7+ Kg2) 101. Qc6 (101. Kb6 {with more complications.} Qe4 102. Qd7+ Kh2 103. Qc7+ Kh3 104. Qc3+) 101... Qf4+ 102. Qd6 (102. Kb6 {is more complex.} Qf2+ 103. Kb7 Qf7+ 104. Ka8 Qf8+ 105. Kb7) 102... Qc4+ 103. Kb6 Qb3+ 104. Ka5 {Qd4 is the strong threat.} Qa2+ 105. Kb4 {And now Qd7+ would win.} Qb2+ 106. Kc4 (106. Kc5 {seems wilder.} Qc1+ 107. Kb6 Qb1+ 108. Ka5 Qa2+) 106... Qc2+ (106... Qa2+ {seems wilder.} 107. Kb5 Qb3+ 108. Qb4 Qd3+ 109. Qc4 Qb1+) 107. Kd4 Qd2+ (107... Kg2 {with more complications.} 108. Qh6 Qd1+ 109. Kc4 Qc2+ 110. Kb4 Qb2+) 108. Ke5 Qg5+ (108... Qe1+ {seems wilder.} 109. Kd5 Qd1+ 110. Ke5 Qe2+ 111. Kf6 Qf3+) 109. Ke4 {Threatens to win with Qd3+.} Qg2+ 110. Kf5 {Threatening mate with Qh6+.} (110. Kd3 {with more complications.} Qf1+ 111. Kc2 Qf2+ 112. Kb3 Qf3+ 113. Ka2) 110... Qg4+ (110... Qf1+ {feels hotter.} 111. Qf4 Qb5+ 112. Kf6 Qxa6+ 113. Kg5 Qb5+) 111. Kf6 {White threatens Qe6 and mate.} Qh4+ (111... Qf3+ {seems wilder.} 112. Ke7 Kg2 113. Qg6+ Kh3 114. Qh7+ Kg2) 112. Kg6 Qe4+ 113. Kg7 {Qh6+ would kill now.} (113. Kg5 {is interesting.} Qg4+ 114. Kf6) 113... Qg4+ $1 114. Qg6 (114. Kf6 {is more complex.}) 114... Qd7+ (114... Qd4+ {with more complications.} 115. Kf7 Qa7+ 116. Kf8 Qf2+ 117. Kg7 Qa7+) 115. Qf7 (115. Kf6 {looks sharper.} Qd8+ 116. Kg7 Qd4+ 117. Kf7 Qa7+ 118. Kf8) 115... Qd4+ 116. Qf6 (116. Kg6 {is more complex.} Qd6+ 117. Kg5 Qxa6 118. Qf5+ Kh2 119. Qe5+) 116... Qa7+ 117. Kg6 {Strongly threatening Qc3+.} Qg1+ 118. Kf7 {White wants to mate with Qh6+.} (118. Kf5 {keeps more tension.} Qc5+ 119. Kg6 Qg1+) 118... Qa7+ 119. Kf8 {Intending Qh8+ and mate.} Qb8+ 120. Ke7 Qa7+ 121. Kd8 Qb8+ 122. Kd7 {aiming for Qe6+.} Qa7+ 123. Kc8 Qa8+ 124. Kd7 Qa7+ 125. Ke8 {Hoping for Qe6+.} Qa8+ 126. Kf7 {Black must now prevent Qc3+.} Qa7+ 127. Kg8 {Weighted Error Value: White=0.11/Black=0.12} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.18"]
[Round "11.2"]
[White "Caruana, Fabiano"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "E05"]
[WhiteElo "2800"]
[BlackElo "2714"]
[Annotator "TA"]
[PlyCount "132"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,132,15,0,28,24,10,5,16,16,16,13,26,23,28,20,25,18,21,14,15,0,20,10,13,5,0,0,15,18,26,25,25,25,25,27,33,31,22,8,20,19,29,0,21,0,27,20,27,10,17,23,154,154,147,147,235,240,255,223,275,236,227,239,260,242,256,193,265,225,258,258,235,19,20,20,19,9,138,33,50,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Bg5 Nbd7 $1 {[%mdl 4] now scores much better than the old 10...Bd5. E05: Open Catalan: 5 Nf3 Be7.} 11. Rd1 h6 12. Bxf6 Nxf6 13. Nbd2 a5 14. Qd3 {[#]} Bb4 $146 ({Predecessor:} 14... Bxf3 15. Bxf3 Nd5 16. Nc4 c6 17. Qb3 Nb4 18. Rac1 Qc7 19. h4 Rfd8 20. e4 Bf6 {½-½ (58) Kunte,A (2505)-Padmini,R (2327) Ahmedabad 2017}) 15. e4 Qe7 16. Ne5 Bd7 17. Ndc4 Rfd8 18. Qe3 Be8 19. h4 Nd7 20. Nxd7 Bxd7 21. e5 Rab8 22. Be4 Be8 23. Qf3 f5 24. exf6 Qxf6 25. Qe3 Bg6 26. Rd3 Bf5 27. Rc1 c6 28. Rc2 Rd7 (28... Rd5 $5) 29. Ne5 Rd6 30. Nc4 Rd7 31. Ne5 Rd6 32. Kg2 Rbd8 33. f3 Bxe4 34. fxe4 Qxe5 35. dxe5 $16 Rxd3 36. Qa7 {[%cal Ra7b7]} Be1 (36... R3d7 $16 37. Qb6 Kh7) 37. Qxb7 $18 Rxg3+ 38. Kh2 Rdd3 39. Qc8+ (39. Rxc6 $2 Rh3+ 40. Kg2 (40. Kg1 $2 Rdg3+ 41. Kf1 Rh1+ 42. Ke2 Rg2+ 43. Kd3 Rh3+ 44. Kd4 Rd2+ 45. Kc5 Bf2+ 46. Kc4 Rc2+ 47. Kb5 Rxb2+ 48. Ka6 Rxb7 $19) 40... Rdg3+ 41. Kf1 Rh1+ 42. Ke2 Rg2+ 43. Kd3 Rh3+ 44. Kd4 Rd2+ 45. Kc4 Rc2+ 46. Kb5 Rxb2+ 47. Ka6 Rxb7 $19) 39... Kh7 40. Qxe6 Rg6 41. Qf5 {White wants to mate with h5.} Bg3+ {[#]} 42. Kg2 $1 {White threatens h5 and mate.} Bxh4+ 43. Kf1 Re3 {[%csl Gh4][%cal Re3e1]} 44. Rc1 c5 {[#]} 45. Rd1 $2 (45. e6 $1 $18) 45... c4 $11 46. e6 Reg3 $1 47. Rd7 ({But not} 47. Qxa5 $2 Rg1+ 48. Ke2 R1g2+ 49. Ke3 Bf2+ 50. Kf4 R6g4+ 51. Kf5 Rg5+ 52. Kf4 Bg3+ 53. Kf3 Rf2+ 54. Ke3 Rxa5 $19) 47... Rg1+ 48. Ke2 {aiming for e7.} R1g5 $1 {[%cal Rg5f5]} 49. e7 Rxf5 {The position is equal.} 50. exf5 {[%mdl 4096] Endgame KRB-KR} Rg1 {And now ...Re1+ would win.} 51. f6 Re1+ 52. Kd2 Re6 53. f7 Bxe7 54. Rxe7 {KR-KR} Rf6 55. Kc3 Kg6 (55... h5 {with more complications.} 56. Kxc4 h4 57. b4 Rf4+ 58. Kd3 h3) 56. Kxc4 {b4 is the strong threat.} Rxf7 (56... h5 {looks sharper.} 57. b4 h4 58. bxa5 Rf4+ 59. Kb5 Rf5+) 57. Rxf7 Kxf7 {K3P-KPP} 58. b4 $1 {[%cal Rb4a5,Bb2b4,Bb4b5][%mdl 32]} Ke6 {Threatens to win with ...axb4.} (58... axb4 59. a5 $18) 59. b5 ({Not} 59. bxa5 $2 Kd6 $19) 59... Kd6 60. Kd4 h5 61. Ke4 g5 62. Kf5 h4 {( -> ...h3)} 63. Kg4 Kc5 64. Kh3 Kd6 65. Kg4 Kc5 66. Kh3 Kd6 {Black defended with fortune.  Weighted Error Value: White=0.13/Black=0.11} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.18"]
[Round "11.3"]
[White "Dominguez Perez, Leinier"]
[Black "Swiercz, Dariusz"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2760"]
[BlackElo "2647"]
[Annotator "TA"]
[PlyCount "127"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,127,10,1,10,3,0,9,11,14,8,12,6,13,0,0,0,0,0,33,0,24,33,24,24,24,32,34,21,17,29,27,32,36,35,35,39,54,54,58,38,54,45,45,31,56,45,45,45,45,45,45,34,34,34,34,34,34,0,34,27,29,24,28,27,34,0,34,0,34,0,34,6,34,34,34,34,34,34,34,34,34,34,34,34,34,34,34,27,27,27,27,27,34,34,34,34,34,34,42,42,42,0,40,0,42,0]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c4 b4 12. Nc2 a5 13. Qf3 {B33: Sicilian: Pelikan and Sveshnikov Variations.} Be7 14. Be2 O-O 15. Rd1 {The position is equal.} Be6 16. O-O Bg5 17. g3 Kh8 18. b3 g6 19. h4 Bh6 20. h5 Kg7 21. Qd3 {[#]} f5 $146 ({Predecessor:} 21... Kh8 22. Nde3 Qc8 23. Bf3 Ra6 24. Qe2 Nd8 25. Bg2 Nb7 26. f4 Nc5 27. Rf2 Bd7 {½-½ (53) Windhausen,G (2547)-Bubir,A (2536) GER email 2017}) 22. c5 dxc5 23. Qb5 $1 {[%csl LRc5,LRc6][%cal Rb5c6]} Nd4 24. Nxd4 cxd4 25. Nb6 Rb8 26. Qxe5+ {[%mdl 64] [#] Double Attack} Qf6 27. Qxf6+ Kxf6 28. Nd5+ Bxd5 29. exd5 Ke5 30. Bc4 {Strongly threatening Rfe1+.} Kd6 31. Rxd4 Rbe8 32. Kg2 Bg7 33. Rdd1 Bc3 34. hxg6 hxg6 35. Rh1 Rh8 36. Rxh8 Rxh8 $14 {[%mdl 4096] Endgame KRB-KRB} 37. Rd3 Re8 38. a4 Re4 39. Rd1 Re1 40. Rd3 Re4 41. f3 Re2+ 42. Kh3 g5 43. f4 gxf4 44. gxf4 (44. Rf3 $5 {[%cal Rc4e2]} Re7 45. Rxf4 $14) 44... Bd2 45. Rd4 Be3 46. Rd1 Rd2 (46... Rf2 {with more complications.} 47. Kg3 Rxf4 48. Re1 Rg4+ 49. Kf3 Bg5) 47. Rf1 (47. Rxd2 {looks sharper.} Bxd2 48. Kg3 Be3 49. Bd3 Kxd5 50. Kf3) 47... Rf2 (47... Kc5 {is more complex.} 48. Kh4 Rg2 49. d6 Kc6 50. Kh3 Rg4) 48. Rxf2 Bxf2 {KB-KB} 49. Kg2 Be3 50. Kf3 Bd2 51. Bd3 Kxd5 52. Bxf5 Bc1 53. Bd3 Kd4 54. Bc4 Bd2 55. f5 Ke5 56. Be6 Bg5 57. Bc8 Bd8 58. Ke3 Bf6 59. Be6 Kd6 60. Ke4 Kc5 61. Kf4 Kd6 62. Ke4 Kc5 63. Kf4 Kd6 64. Ke4 {Weighted Error Value: White=0.08/Black=0.05} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.18"]
[Round "11.4"]
[White "So, Wesley"]
[Black "Robson, Ray"]
[Result "1/2-1/2"]
[ECO "E36"]
[WhiteElo "2778"]
[BlackElo "2669"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,52,13,10,0,20,19,19,14,14,14,15,16,14,0,0,0,0,0,0,0,0,0,9,0,15,15,16,17,24,15,16,7,10,0,22,0,9,0,18]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 d5 5. a3 Bxc3+ 6. Qxc3 O-O 7. Nf3 dxc4 8. Qxc4 b6 9. Bg5 {E36: Nimzo-Indian: Classical: 4...d5 5 a3.} Bb7 10. Rd1 $1 {[%mdl 4] is now more promising than 10.Rc1.} Nbd7 11. Ne5 h6 12. Bh4 c5 13. f3 cxd4 14. Qxd4 {[%cal Re5d7]} Nxe5 15. Qxe5 Qe7 16. e4 Rfd8 {[#] ...Rxd1+ is the strong threat.} 17. Bd3 $146 ({Predecessor:} 17. Be2 Rxd1+ 18. Bxd1 Ba6 19. Be2 Bxe2 20. Kxe2 Rd8 21. Rd1 Rxd1 22. Kxd1 Qd7+ 23. Ke1 Ne8 24. Bf2 {½-½ (24) Deac,B (2618)-Gelfand,B (2684) Bucharest 2019}) 17... Rac8 {[#] And now ...Ba6! would win.} 18. O-O Rc5 19. Bxf6 Qxf6 20. Qxf6 gxf6 21. Kf2 Kf8 22. Ke3 Ke7 {The position is equal.} 23. Bb1 Rdc8 24. Bd3 Rd8 25. Bb1 Rdc8 26. Bd3 Rd8 {Not much happened in this game.  Weighted Error Value: White=0.03/Black=0.02} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.18"]
[Round "11.5"]
[White "Naroditsky, Daniel"]
[Black "Sevian, Samuel"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2623"]
[BlackElo "2654"]
[Annotator "TA"]
[PlyCount "27"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,26,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d4 exd4 6. cxd4 Bb4+ 7. Bd2 Bxd2+ 8. Nbxd2 d5 9. exd5 Nxd5 10. Qb3 Na5 11. Qa4+ Nc6 12. Qb3 Na5 13. Qa4+ Nc6 $1 {[#]} {Predecessor:} 14. Ke2 $146 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 1/2-1/2

[Event "USA Championship 2021"]
[Site "Saint Louis"]
[Date "2021.10.18"]
[Round "11.6"]
[White "Burke, John M"]
[Black "Xiong, Jeffery"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2554"]
[BlackElo "2700"]
[Annotator "TA"]
[PlyCount "49"]
[EventDate "2021.10.06"]
[EventCountry "USA"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,49,29,10,14,0,0,0,2,0,0,0,22,17,15,14,12,12,40,33,129,122,120,96,156,165,161,156,133,60,406,399,475,512,715,712,690,681]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. c3 h6 7. Re1 O-O 8. h3 a5 {outshines the older 8...a6. C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 9. d4 Ba7 10. Bb3 Re8 {The position is equal.} 11. Bc2 Bd7 12. a4 {[#]} Qc8 $146 ({Predecessor:} 12... exd4 13. cxd4 d5 14. e5 Ne4 15. Nc3 Bf5 16. Nxe4 Bxe4 17. Bxe4 dxe4 18. Rxe4 {½-½ (34) Praggnanandhaa,R (2567)-Buckels,V (2442) Mumbai 2019}) 13. Be3 exd4 14. Bxd4 Nxd4 15. cxd4 c5 16. e5 $1 {[%cal Re5f6]} Nd5 {[#]} (16... Nh5 $14) 17. Qd3 $1 $16 {[%cal Rd3h7]} g6 18. Bb3 Nf4 ({Better is} 18... Be6) 19. Qe4 Ne6 20. Qh4 (20. exd6 c4 $17) 20... c4 {[#]} (20... cxd4 $2 21. Qxh6 dxe5 22. Ng5 $18) 21. Nc3 dxe5 $2 {[%mdl 8192] Loses the game.} ({Don't go for} 21... cxb3 $2 22. Qxh6 Bxd4 23. Nd5 $18) (21... Ng5 $14 22. Ba2 (22. Nxg5 hxg5 23. Qxg5 Bxd4 $11) 22... Qc6) 22. Qxh6 $18 Bc6 {[#] Strongly threatening ...Bxf3.} ({Inferior is} 22... cxb3 23. Ne4 $18) 23. d5 $1 {[%mdl 64] Double Attack. White is clearly winning.} cxb3 (23... Bxf2+ 24. Kxf2) 24. Ne4 {[%cal Re4f6]} ({Not} 24. dxc6 Nf8 $18) 24... Qd8 25. dxe6 {Weighted Error Value: White=0.07/Black=0.63} 1-0

