[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "1.1"]
[White "Vachier-Lagrave, Maxime"]
[Black "Dubov, Daniil"]
[Result "1-0"]
[ECO "C55"]
[WhiteElo "2784"]
[BlackElo "2710"]
[Annotator "TA"]
[PlyCount "129"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,129,16,29,25,31,16,29,28,45,38,37,28,28,28,28,25,28,28,32,29,37,34,33,19,22,14,39,14,14,0,7,7,16,7,80,73,81,59,86,82,100,98,119,119,119,119,119,119,119,119,119,118,117,91,92,97,112,91,113,101,112,98,125,106,145,104,108,111,272,258,295,276,597,594,623,624,1268,1029,1042,32,32,36,73,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1095,779,771,771,764,749,723,683,676,615,607,600,29972,29975,29978,29979,29988,29989]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. d3 Be7 5. O-O d6 6. a4 O-O 7. Re1 Be6 8. a5 a6 9. h3 {C55: Two Knights: 4 d3, 4 d4 exd4 5 e5 and Max Lange Attack.} h6 10. Nbd2 Nh7 11. Nf1 {[#] White has an edge.} Ng5 $146 ({Predecessor:} 11... Bxc4 12. dxc4 Bg5 13. Bxg5 Nxg5 14. c3 Nxf3+ 15. Qxf3 Qh4 16. Qg4 Qxg4 17. hxg4 Rab8 {1-0 (45) Hughes,G (2166)-Beckett,P (1991) ICCF email 2018}) 12. Bxg5 Bxg5 13. Bxe6 fxe6 14. c3 Be7 15. N1h2 Qd7 16. b4 Kh8 17. Ra2 Rad8 18. Rae2 Rf7 19. Re3 Rdf8 20. R1e2 Rf4 21. g3 R4f7 22. Kg2 Bf6 23. Ng4 Qe7 (23... Be7 {feels hotter.} 24. h4 Kg8 25. Qb3 Bf6 26. Rb2 Na7) 24. h4 h5 (24... Qe8 $11) 25. Nxf6 $16 gxf6 26. d4 Rg7 27. Rb2 Qe8 28. dxe5 Nxe5 29. Nxe5 dxe5 30. Rd2 Qg6 31. Rd8 Rgg8 32. Rxf8 Rxf8 {[%mdl 4096] Endgame KQR-KQR} 33. Qd7 Qf7 34. Rd3 (34. Qd2 {seems wilder.} Qe8 35. Rd3 Kg7 36. Qd1 Qg6 37. Rd7+) 34... Kg7 35. f3 (35. c4 {is interesting.} Qxd7 36. Rxd7+ Rf7 37. Rd8 c6 38. Kf3) 35... f5 36. Qxf7+ Rxf7 {KR-KR} 37. c4 Kf6 38. Rd8 Rg7 39. Rf8+ Rf7 40. Rh8 Kg6 41. Rd8 Kf6 $2 {[#]} (41... fxe4 $16 42. fxe4 c6) 42. b5 $1 $18 Rg7 43. Rf8+ Ke7 $2 (43... Rf7 44. Rh8 axb5) 44. Rb8 Kd6 45. Rxb7 axb5 46. cxb5 f4 47. a6 $2 (47. g4 $1 $18) 47... Rxg3+ $14 48. Kf2 {White threatens a7 and mate.} Rh3 $1 49. b6 (49. Rb8 $16 Rh2+ 50. Ke1) 49... cxb6 $11 50. Rxb6+ Kc5 $1 {[%cal Rc5b6]} 51. Rxe6 (51. a7 {is more complex.} Rh2+ 52. Kf1 Ra2 53. Rb7 Kd4 54. Rb4+) 51... Rh2+ 52. Kg1 Ra2 53. Rxe5+ {[%mdl 64] Double Attack} Kd4 $1 {[%cal Rd4e5]} 54. Rxh5 (54. Rb5 {with more complications.} Rxa6 55. Rxh5 Ke3 56. Kg2 Ra2+ 57. Kh3) 54... Ke3 55. Rh6 (55. e5 {seems wilder.} Kxf3 56. e6 Ra1+ 57. Kh2 Ra2+ 58. Kh3) 55... Kxf3 56. h5 {Hoping for Rb6.} Kxe4 $2 {[%mdl 8192]} (56... Ra5 $11) 57. Re6+ Kf5 {[#]} 58. h6 $1 {[%cal Rh6h7][%mdl 512] Threatens to win with h7!} Ra1+ 59. Kf2 Ra2+ 60. Ke1 ({Inferior is} 60. Re2 Rxa6 61. h7 Rh6 $11) 60... Ra1+ 61. Kd2 Ra2+ 62. Kc3 {Black must now prevent Rb6.} Ra1 {[#]} 63. h7 $1 {[%mdl 512] White mates.} Rh1 {[#]} (63... Rc1+ 64. Kd3) 64. a7 $1 {[%mdl 512]} Rh3+ (64... Rc1+ 65. Kd2) 65. Kc4 {Weighted Error Value: White=0.21/Black=0.28} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "1.2"]
[White "So, Wesley"]
[Black "Carlsen, Magnus"]
[Result "1-0"]
[ECO "B52"]
[WhiteElo "2770"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,105,35,42,31,35,35,31,26,18,18,17,12,29,22,20,16,53,25,48,53,38,49,53,51,59,74,58,29,38,24,25,27,29,31,20,15,25,22,43,-4,31,26,29,27,54,66,60,68,58,52,143,146,152,139,167,152,162,145,273,259,267,267,254,262,253,245,226,104,271,264,6407,6407,6407,6295,6287,5741,6211,6195,2409,1990,1339,1329]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Bd7 4. Bxd7+ Qxd7 5. c4 Nf6 6. Nc3 g6 7. d4 cxd4 8. Nxd4 Bg7 9. f3 O-O 10. Be3 Rc8 11. b3 Nc6 12. O-O Qd8 13. Qd2 Qa5 14. Rfd1 {B52: Sicilian: Moscow Variation with 3...Bd7.} Nd7 15. Nde2 a6 16. a4 {White is slightly better.} e6 17. Rab1 Rd8 18. Bg5 {[#]} Re8 $146 ({Predecessor:} 18... Bf6 19. Bxf6 Nxf6 20. Nd4 Qc5 21. Kh1 Nb4 22. Na2 Rac8 23. Nxb4 {1-0 (23) Kitson,K (2306)-Grobler,D (2234) ICCF email 2015}) 19. Bf4 Nde5 20. h3 Rad8 21. Kh2 (21. Bg5 $5 {[%cal Rg5d8]}) 21... Qb4 22. Bg5 f6 23. Be3 Nf7 24. f4 f5 25. exf5 $1 gxf5 26. Nd4 d5 27. cxd5 exd5 {And now ...Rxe3! would win.} 28. Bg1 Nd6 29. Qd3 (29. Nxd5 Qxd2 30. Rxd2 Bxd4 $19) 29... Ne4 30. Nce2 Nxd4 31. Bxd4 Bxd4 32. Nxd4 Kh8 33. Rbc1 {[%cal Bb1c1,Bc1c2,Bc2c7,Bc7b7][%mdl 32]} (33. Nxf5 Nc3 $15) 33... Qd6 34. Qe3 Ng5 35. Qf2 Ne4 36. Qh4 Rf8 37. Rc2 Qg6 (37... Rf6 $14) 38. Rc7 $16 Rg8 {[%csl Gg8][%cal Rg6g2]} 39. Rg1 Rc8 40. Rxb7 Rc3 {[#] Threatens to win with ...Rg3!} 41. Ne6 $1 {[%mdl 512]} Rc2 (41... Re3 $16 {is a better defense.} 42. Ng5 Nxg5 43. fxg5 Re4) 42. Ng5 $1 $18 {[%cal Rb7h7]} Rg7 43. Rb8+ Rg8 44. Rxg8+ Kxg8 45. Nxe4 dxe4 {[%mdl 4096] Endgame KQR-KQR} 46. Kh1 (46. Qd8+ $18 {is more deadly.} Kg7 47. Qd7+ Qf7 48. Rd1) 46... Kg7 $2 {Loses the game.} (46... Rd2 $16) 47. g4 Kf7 (47... Kf8 48. Qd8+ Qe8 49. Qf6+ Qf7 50. Qd6+ (50. Qxa6 Qxb3 51. Qf6+ Ke8 $14) (50. Qxf5 Qxf5 51. gxf5 Rb2 $11) 50... Qe7 51. Qxa6 e3 52. Qa8+ Qe8 53. Qxe8+ Kxe8) 48. gxf5 {White is clearly winning.} ({Don't go for} 48. Qd8 $2 Qc6 $19) 48... Qxf5 {[#]} 49. Rg5 $1 {[%cal Rg5f5]} Rc1+ 50. Kg2 Rc2+ 51. Kf1 Rc1+ 52. Ke2 Rc2+ 53. Ke1 {Weighted Error Value: White=0.08/Black=0.21} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "1.3"]
[White "Aronian, Levon"]
[Black "Ding, Liren"]
[Result "1-0"]
[ECO "B86"]
[WhiteElo "2781"]
[BlackElo "2791"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,65,0,0,-25,-14,-24,-36,-27,-24,-28,-35,-62,-37,-43,-56,-70,-87,-150,-150,-140,-139,-140,-139,-135,-137,-129,0,0,16,0,2,0,0,0,142,140,138,145,244,244,2120,1937,1198,287,264,0,1001,95,1214,1188]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Be3 b5 8. Bb3 Be7 {outshines the older 8...Bb7.} 9. a3 O-O {[#]} 10. h4 $146 {B86: Sicilian Scheveningen/Najdorf: 6 Bc4, without early ...b5.} ({Predecessor:} 10. Qe2 Bb7 11. f3 Nc6 12. O-O-O Na5 13. h4 Rc8 14. Kb1 Rxc3 15. bxc3 Qc7 16. g4 Nd7 17. g5 Ne5 18. h5 Nec4 {1-0 (40) Aronian,L (2781)-Giri,A (2764) chess24.com INT 2020}) 10... Bb7 11. h5 h6 ({But not} 11... Nxe4 $6 12. Nxe4 Bxe4 13. Qg4 $14) 12. f3 {Black is slightly better.} Nc6 13. Qe2 Na5 14. g4 Rc8 15. g5 hxg5 16. h6 {[#] Black must now prevent hxg7.} g6 17. h7+ (17. Bxe6 $142 fxe6 18. Nxe6 {[%mdl 64] Double Attack}) 17... Kh8 $17 18. Bxe6 fxe6 19. Nxe6 Qd7 20. Nxf8 Bxf8 21. O-O-O Rxc3 22. bxc3 $11 Qe6 23. Bxg5 Nh5 {[#]} 24. Rxh5 $1 gxh5 25. e5 {Bf6+ is the strong threat.} Kxh7 ({Much weaker is} 25... Qxe5 $6 26. Qxe5+ dxe5 27. Rd8 $16) (25... Bc8 $11 {remains equal.}) 26. Qd3+ $16 Qg6 {aiming for ...Qxd3.} 27. exd6 Bxd6 (27... Bc6 $16) 28. Qxd6 $18 Qxg5+ $2 (28... Qxd6 29. Rxd6 Bxf3) 29. f4 Qg7 30. Qd3+ $2 (30. Qe6 Bc6 31. Rd8 Qg1+ 32. Kb2 Nc4+ 33. Ka2) 30... Kh6 31. Qd6+ $2 (31. Qd8 Nc4 32. Re1) 31... Kh7 32. Qd8 $2 (32. Qe6 $18 {Intending Qf5+ and mate.} Bc6 33. Rd8 Qg1+ 34. Kb2) 32... Nc6 $2 {[%mdl 8192]} (32... Nb3+ $16 33. Kb1 Nc5) 33. Qe8 {White used his chance.  Weighted Error Value: White=0.88/Black=0.26} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "1.4"]
[White "Bluebaum, Matthias"]
[Black "Radjabov, Teimour"]
[Result "1/2-1/2"]
[ECO "D05"]
[WhiteElo "2670"]
[BlackElo "2765"]
[Annotator "TA"]
[PlyCount "157"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,157,16,62,58,69,34,48,35,47,20,43,8,32,24,28,21,35,34,35,39,51,28,40,21,34,35,36,22,16,0,0,-65,-64,-65,-66,-54,-51,-43,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,0,0,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 e6 3. e3 d5 4. Bd3 c5 5. b3 Nc6 6. O-O Bd6 7. Bb2 Qc7 8. dxc5 $1 {[%mdl 4] now scores much better than the old 8.c4. D05: Colle System with ...e6.} Bxc5 9. c4 dxc4 10. Bxc4 {White is slightly better.} O-O 11. a3 {[#]} Rd8 $146 ({Predecessor:} 11... a6 12. b4 Bd6 13. Nbd2 e5 14. Qb1 Qe7 15. Ng5 Bc7 16. f4 h6 17. Nge4 Ng4 {0-1 (100) Kunin,V (2576)-Kvisvik,B (2304) Helsingor 2015}) 12. Qc2 Be7 13. b4 Bd7 14. Nbd2 Rac8 15. Rac1 Qb8 16. Qb1 h6 17. Nb3 {aiming for b5.} a6 18. h3 Be8 19. Qa1 Na7 20. Be5 Qa8 21. Nbd4 (21. Qb2 {is more complex.} Nc6 22. Bc3 Na7 23. Nbd2 Ba4 24. Be2) 21... Nc6 22. Nxe6 (22. Nxc6 $11 Bxc6 23. Be2) 22... Nxe5 $15 23. Nxe5 {[#]} Rxc4 $1 24. Nxc4 fxe6 25. Qe5 Bf8 26. Qxe6+ {The position is equal.} Bf7 27. Qf5 Rd5 28. Nb6 Rxf5 29. Nxa8 a5 30. Rc8 axb4 31. axb4 Rb5 32. Rb1 Ne8 33. Rd1 Rxb4 34. Rdd8 Be7 35. Rxe8+ Bxe8 36. Rxe8+ $11 {[%mdl 4160] [#] Endgame Double Attack. KRB-KRN} Kf7 37. Rc8 Rb1+ 38. Kh2 Ke6 (38... b5 {seems wilder.} 39. Nb6 b4 40. Nc4 Ke6 41. e4 Kd7) 39. f4 Rb3 40. Rc2 Rxe3 41. Nc7+ Kf7 42. Nd5 Rd3 43. Nxe7 Kxe7 {KR-KR} 44. Rb2 Rd7 45. Kg3 Kd6 46. Kg4 Kc5 47. Rc2+ Kb4 48. Rb2+ Kc4 {Hoping for ...b5.} 49. Rb6 Kc5 50. Rb1 b5 51. Rc1+ Kd5 52. Kf5 b4 53. Kg6 Ke4 {...b3 is the strong threat.} 54. g4 Kxf4 {White must now prevent ...Rd6+.} (54... b3 {looks sharper.} 55. f5 b2 56. Rb1 Rb7 57. h4 Ke5) 55. Rc4+ {[%mdl 64] Double Attack} Kg3 56. Rxb4 Kxh3 57. Rc4 Kg3 58. Rb4 Rc7 59. Ra4 Rb7 60. Rc4 Rb6+ 61. Kxg7 Kh4 62. Kf7 Kg5 63. Ra4 Rb7+ 64. Ke6 Rg7 65. Ra1 Rc7 66. Ra4 Rb7 67. Rc4 Ra7 68. Rb4 Kg6 69. Ke5 Rf7 70. Rb8 Kg5 71. Rg8+ Kh4 72. Rh8 Kxg4 {Strongly threatening ...h5.} 73. Rxh6 Kg5 74. Re6 Rf5+ 75. Kd6 Rf6 76. Ke5 Rf5+ 77. Kd6 Rf6 78. Ke5 Rxe6+ 79. Kxe6 {Weighted Error Value: White=0.06/Black=0.04} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "1.5"]
[White "Shankland, Sam"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1-0"]
[ECO "D50"]
[WhiteElo "2691"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,75,16,12,23,24,12,12,19,21,21,11,22,9,13,8,14,16,8,5,18,18,20,15,16,0,0,0,6,0,41,33,45,37,50,45,70,64,84,46,74,27,27,25,31,29,30,-9,29,25,224,221,634,271,508,513,1079,1128,29994,29995,29997,29998,29998,29999]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. Bg5 Be7 8. e3 O-O {D50: Queen's Gambit Declined: Dutch-Peruvian Gambit.} 9. Qa4 $5 {[%mdl 4] An interesting side line.} h6 10. Bh4 Be6 {The position is equal.} 11. Bd3 Nc6 12. O-O Qb6 {[#]} 13. Ne2 $146 ({Predecessor:} 13. Qb5 Qxb5 14. Nxb5 Rac8 15. Rac1 Rfd8 16. Nbd4 Nxd4 17. Nxd4 a6 18. Rfd1 Rxc1 19. Rxc1 {½-½ (46) Rojicek,V (2450)-Hausner,I (2407) Czechia 2013}) 13... Bd7 14. Qb5 Nb4 15. Qxb6 axb6 16. Bb1 g5 17. Bg3 Ne4 18. Rd1 Ba4 19. Rc1 Rfc8 20. Nc3 Nxc3 21. bxc3 {Threatens to win with Bf5.} Nc6 22. Bf5 Re8 23. Rab1 Ba3 24. Re1 b5 25. h4 gxh4 26. Nxh4 Bf8 27. Bd3 b4 $1 {[%cal Rb4c3]} 28. Rec1 bxc3 29. Rxb7 d4 30. Nf5 dxe3 31. fxe3 Nb4 $2 {Black cannot hold the game after this.} (31... Ne5 $11 {and Black is okay.} 32. Bxe5 (32. Rxc3 $2 Nxd3 33. Rxd3 Bc2 $19) 32... Rxe5) 32. Bc4 $18 ({Wrong is} 32. Rxc3 $2 Nxd3 33. Rxd3 Bc2 $19) 32... Kh8 $2 (32... Bc6 33. Bxf7+ (33. Rxf7 Bd5 $11) 33... Kh7) 33. Rxc3 (33. Be1 $142 Bc6 34. Bxc3+ {[%mdl 64] Double Attack} Kg8 35. Bxf7+ {[%mdl 64] Double Attack} Kh7 36. Rxb4 Bxb4 37. Bxb4) 33... Rac8 $2 (33... Bc6 {was called for.}) 34. Bh4 {[#] Hoping for Bf6+.} Bc6 (34... Rc6 $142 35. Rxf7 Rg6 36. Bf6+ Rxf6 37. Rxf6 Bd7 38. Nxh6 Bc5 39. Nf7+ Kg7) 35. Bf6+ Kh7 36. Rxf7+ {White mates.} Kg6 37. Nh4+ Kh5 38. Be2+ {Weighted Error Value: White=0.19/Black=0.59} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "1.6"]
[White "Dominguez Perez, Leinier"]
[Black "Nakamura, Hikaru"]
[Result "1/2-1/2"]
[ECO "C70"]
[WhiteElo "2758"]
[BlackElo "2736"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,96,26,28,42,29,29,39,29,37,35,39,33,35,26,27,27,36,44,56,50,55,40,38,44,50,57,118,115,119,121,112,106,127,127,97,94,97,92,100,101,116,106,104,52,49,44,50,47,41,46,39,33,35,42,60,58,60,32,36,36,34,1,32,26,46,32,32,32,51,44,81,47,70,8,8,0,7,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 g6 5. d4 b5 6. Bb3 {C70: Ruy Lopez: 3...a6 4 Ba4, Norwegian and Delayed Schliemann.} exd4 7. Nxd4 Na5 8. a4 {White is slightly better.} b4 9. Bd5 c6 10. Ba2 Bg7 11. O-O Ne7 12. c3 $40 {[%mdl 128] Black needs to defend precisely.} c5 13. Nb3 {[#] Black must now prevent Nxa5.} Nxb3 $146 ({Predecessor:} 13... Nb7 14. Be3 c4 15. cxb4 cxb3 16. Qxb3 O-O 17. Nc3 d6 18. Rfd1 Be6 19. Qc2 Bxa2 20. Rxa2 Qc8 {0-1 (42) Muzychuk,A (2535)-Khademalsharieh,S (2494) chess.com INT 2020}) 14. Qxb3 {[%csl Ga2][%cal Rb3f7] [#]} O-O 15. cxb4 Rb8 16. b5 Nc6 17. Bf4 Rb6 18. Nc3 Nd4 19. Qd1 axb5 20. axb5 Nxb5 21. Nxb5 Rxb5 22. Bd6 Re8 {[#]} 23. Bc4 $1 {[%cal Rc4b5]} Rxb2 24. Ra8 {Threatens to win with Qd5.} Rb6 25. Qd5 Qf6 26. e5 (26. Bxc5 $16 Rc6 27. Rd1) 26... Qf5 $1 $14 27. f4 ({Don't play} 27. Qxc5 Rc6 $15) 27... Bf8 $1 28. Bxf8 Rxf8 29. Qxc5 Rc6 30. Qd4 Qc2 $1 31. Bd5 Rc3 32. Rd1 {Hoping for Ra2.} Rc7 33. Ra2 (33. h4 {feels hotter.} Bb7 34. Bxf7+ Kg7 35. Ra2 Qe4 36. e6+) 33... Qc5 34. Qxc5 Rxc5 35. g3 Kg7 (35... d6 $5) 36. Ra7 Re8 37. Rd2 h5 38. h4 Kf8 39. Kf2 Ke7 40. Bg2 f6 41. Bh3 ({White should play} 41. Be4 $14) 41... fxe5 $11 {The position is equal.} 42. Bxd7 Bxd7 43. Raxd7+ {[%mdl 4096] Endgame KRR-KRR} Ke6 44. R7d6+ (44. R2d6+ {with more complications.} Kf5 45. Rf7+ Kg4 46. Rxg6+ Kh3 47. Rf5) 44... Kf7 45. Rd7+ Kf6 46. R7d6+ Kf7 47. Rd7+ Kf6 48. R7d6+ Kf7 {Weighted Error Value: White=0.07/Black=0.04} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "1.7"]
[White "Duda, Jan-Krzysztof"]
[Black "Nepomniachtchi, Ian"]
[Result "0-1"]
[ECO "D87"]
[WhiteElo "2743"]
[BlackElo "2789"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,118,20,27,0,0,0,10,0,0,0,0,0,0,0,22,21,20,20,20,20,42,24,43,0,29,37,28,33,36,16,67,68,83,77,57,76,76,19,25,18,27,35,46,0,0,0,0,0,0,0,7,11,24,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,279,279,260,239,215,215,214,0,72,0,0,-50,-50,-29977,-50,-29997,-29998,-29998,-29999]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 O-O 9. O-O Nc6 10. Be3 b6 11. Qd2 {D87: Exchange Grünfeld: Classical Line: Variations without ...cxd4.} Bb7 12. Rac1 {12.Rfd1 is the fancy move.} Rc8 13. Rfd1 {The position is equal.} e6 14. Bb5 cxd4 15. cxd4 Na5 16. f3 Qe7 17. Bg5 Qa3 18. h4 {[#]} a6 $146 ({Predecessor:} 18... h5 19. Kh1 Kh7 20. Rxc8 Rxc8 21. d5 exd5 22. exd5 a6 23. d6 f6 24. Bd3 fxg5 {1-0 (36) Sjugirov,S (2651)-Korchmar,V (2346) Taganrog 2014}) 19. Bd3 Nc6 20. Bb1 Na5 21. Bd3 Nc6 22. e5 Nb4 23. Bc4 {Be7 is the strong threat.} Rfe8 24. h5 b5 {[#]} (24... Bd5 $1 $11 25. Rc3 Qa5) 25. Rc3 $1 $14 Qa5 26. Bb3 Rxc3 27. Nxc3 Qb6 28. Be3 (28. Kh2 $16) 28... Nd5 $11 29. Nxd5 Bxd5 30. Bxd5 exd5 31. h6 Bf8 32. Rc1 b4 33. Kf2 a5 34. Qc2 Ra8 35. Qa4 Qd8 36. Qc6 a4 37. e6 Ra7 38. exf7+ Kxf7 39. Bf4 Qd7 40. Qb6 Rb7 41. Qa6 b3 42. axb3 {Hoping for Be5.} axb3 43. Be5 {Strongly threatening Qf6+.} Be7 44. Rc6 {Threatens to win with Rf6+!} Ra7 45. Qb6 $1 Rb7 46. Qa6 {aiming for Rf6+!} (46. Rf6+ $2 Ke8 $19) 46... Ra7 47. Qb6 $1 Ra2+ 48. Ke3 {And now Rf6+! would win.} Qf5 {( -> ...Bg5+)} (48... Rxg2 49. Rc7 $14) 49. Rc7 Qg5+ $40 {[%mdl 128] Black has some attack.} ({Much worse is} 49... Rxg2 $6 50. Qxb3 Qg5+ 51. Bf4 $16) 50. Bf4 Qh4 {[%mdl 8192] [#]} (50... Qxg2 $11 {and Black has nothing to worry.} 51. Rxe7+ Kxe7 52. Qd6+ Kf7 53. Qxd5+ Kf6 54. Qe5+ Kf7 55. Qg7+ Ke6 56. Qg8+ Kf6 57. Qh8+ Ke6 58. Qg8+ Kf6 59. Qh8+ Ke6 60. Qg8+) 51. g3 $1 $18 {[%cal Rg3h4]} Qf6 ({And not} 51... Qh2 {[#]} 52. Rxe7+ $1 {[%mdl 512]} Kxe7 53. Qd6+ Ke8 54. Qc6+ Kf7 55. Qd7+ Kf6 56. Be5+ Kg5 57. Qe7+ Kxh6 58. Bf4+ Kh5 59. Qxh7#) 52. Qxb3 {[%mdl 64] Double Attack} Ra5 53. Be5 Qa6 54. Qd3 (54. Qb4 $1 $18 {[%cal Rb4e7]} Ra3+ 55. Kf2 (55. Kf4 $2 {leads to mate.} g5+ {[%mdl 64] Discovered Attack} 56. Kg4 Qe6+ 57. Kh5 Qh3#) 55... Ra2+ 56. Kg1) 54... Qb6 (54... Ra3 $11 55. Rc3 Rxc3 56. Qxc3 Qf1) 55. Kf4 (55. Qc2 $16) 55... Ra2 $11 56. g4 Qb2 $1 {[%cal Rb2h2][%mdl 1024] White must now prevent ...Qh2+. Black has compensation.} 57. Qd1 $2 {[%mdl 8192]} (57. Rxe7+ $15 Kxe7 58. Kg5) 57... Ke6 $2 (57... Qh2+ {mates} 58. Ke3 Ra3+ 59. Qd3 Qg1+ 60. Ke2 Ra2+ 61. Qc2 Qg2+ 62. Kd1 Qxf3+ 63. Kc1 Qf1+ 64. Kd2 Qf2+ 65. Kd1 Qf1+ 66. Kd2 Qf2+ 67. Kd3 Rxc2 68. Rxc2 Qf3+ {[%mdl 64] Double Attack} 69. Kd2 Bg5+ {[%mdl 64] Double Attack} 70. Ke1 Qe3+ 71. Kf1 Qd3+ 72. Re2 Bh4 73. Bg3 Bxg3 74. Kg2 Qxe2+ {[%mdl 64] Double Attack} 75. Kxg3 Ke6 76. Kh3 Kf6 77. g5+ Kxg5 78. Kg3 Kf5 79. Kh3 Kf4 80. Kh4 Qh5#) 58. Qh1 $2 {[%mdl 8192]} (58. Rxe7+ $15 Kxe7 59. Kg5) 58... Qd2+ 59. Kg3 Qf2+ {Weighted Error Value: White=0.37/Black=0.24} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "1.8"]
[White "Grischuk, Alexander"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "C65"]
[WhiteElo "2777"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,103,-100,-96,-95,-93,-96,-90,-84,-79,-90,-79,-89,-87,-76,-76,-77,-93,-83,-62,-98,-88,-79,-72,-93,-84,-71,-70,-89,-13,-13,-16,-19,-19,-59,-53,-46,-47,-53,-46,-50,-45,-46,-45,-53,-45,-46,-47,-53,-45,-53,-44,-44,-44,-44,-44,-44,-44,-45,-44,-44,-44,-44,-44,-44,-37,-37,0,-37,-37,-39,-39,-45,-39,-45,-45,-45,-41,-41,-39,-45,-39,-45,-45,-45,-45,-45,-45,-45,-45,-45,-37,-37,0,-50,-37,-37]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 {[#]} 4. Kf1 $146 (4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 O-O 9. d4 Bf6 10. Re1 Re8 11. Bf4 Rxe1 12. Qxe1 Ne8 13. c3 d5 14. Bd3 g6 15. Nd2 Ng7 16. Qe2 c6 17. Re1 Bf5 18. Bxf5 Nxf5 {½-½ (49) Grischuk,A (2777)-Giri,A (2764) Chess.com INT 2020}) ({Predecessor:} 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. h3 Ke8 10. Nc3 h5 11. Bf4 Bb4 12. Ne2 Be6 13. Ned4 Nxd4 14. Nxd4 Bd5 15. a3 Be7 16. Rfe1 g5 17. Bg3 Rh6 18. Rad1 {½-½ (65) Vachier Lagrave,M (2784)-Aronian,L (2781) chess24.com INT 2021}) 4... Nxe4 5. d3 Nf6 6. Bxc6 {C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5.} dxc6 7. Nxe5 Bd6 8. Nc4 {Black is better.} Be7 9. Nc3 O-O 10. h3 Nd5 11. Bd2 Be6 12. Kg1 b5 13. Ne3 Bf6 14. Ncxd5 cxd5 15. Bb4 Re8 16. d4 Bg5 17. Qf3 a5 18. Bc5 Bxe3 (18... Ra6 $17) 19. Qxe3 $11 Bf5 20. Qd2 c6 21. Qf4 Bxc2 22. Kh2 Qd7 23. Rhe1 a4 24. Bb4 f6 25. f3 Bg6 26. Rxe8+ Rxe8 27. Re1 Rxe1 28. Bxe1 Qe7 29. Qd2 a3 30. bxa3 Qxa3 31. Qc3 Qd6+ 32. Bg3 Qe6 33. a3 h6 34. Qe1 Qd7 35. Qc3 Kh7 36. Qe3 Bb1 37. Be1 Bg6 38. Bb4 Qc7+ 39. Kg1 Bf5 40. Qe1 Qf4 41. Qd2 Qg3 42. Qf2 Qg5 (42... Qg6 {keeps more tension.} 43. Kh2 Qe8 44. Qe1 Qb8+ 45. Kh1 Qa7) 43. Qd2 Qg6 44. Kh2 Bd3 45. Qf4 Qe8 46. Qc7 Bf1 (46... h5 {is interesting.} 47. Qf4 Bg6 48. Kg3 Qd7 49. Kf2 Bb1) 47. Be7 Qg6 {[%csl Gf1][%cal Rg6g2] [#]} 48. Qg3 Qf7 49. Bb4 Bd3 50. Qd6 Qe8 51. Qc7 Bf5 52. Qe7 {Weighted Error Value: White=0.04/Black=0.08} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "2.1"]
[White "Dubov, Daniil"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "C56"]
[WhiteElo "2710"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,105,10,15,67,54,69,76,85,80,80,87,81,89,97,88,91,106,94,75,86,91,94,73,71,60,68,59,66,31,95,88,109,93,142,96,120,86,82,82,82,81,85,79,79,68,79,65,78,65,57,47,85,85,114,112,146,146,134,139,162,152,233,100,150,136,760,659,913,741,1102,1114,2579,2840,2362,1114,1114,0,1186,247,1178,1155,29959,10329,6440,0,0,0,1381,0]} 1. e4 e5 2. Bc4 Nf6 3. d4 exd4 4. Nf3 Nc6 5. O-O Nxe4 6. Re1 d5 7. Bxd5 Qxd5 8. Nc3 Qd8 9. Rxe4+ Be7 10. Nxd4 O-O {C56: Two Knights: 4 d4 exd4 5 0-0 Nxe4.} (10... f5 $11 11. Rf4 (11. Qh5+ g6 $17) 11... O-O) 11. Bf4 $14 Bf6 {[%cal Rf6d4]} 12. Nxc6 {[#]} Qxd1+ $146 {White is better.} ({Predecessor:} 12... bxc6 13. Rc4 Rb8 14. Qxd8 Bxd8 15. b3 Bf6 16. Rxc6 Rb6 17. Rxc7 Rb7 18. Rc5 Bd4 {1-0 (37) Neiman,E (2240)-Letreguilly,O (2200) France 1989}) 13. Rxd1 {Ne7+ is the strong threat.} bxc6 {[#]} 14. Rc4 $1 Bf5 15. Rxc6 Bxc2 16. Rd2 Bf5 17. Nd5 Bd8 18. Bxc7 Re8 {[%cal Re8e1] [#]} 19. h3 {And now Bxd8 would win.} Be6 20. Rc3 Bg5 21. f4 Bh4 {Black wants to play ...Be1.} 22. g3 Be7 23. g4 Rac8 ({Better is} 23... Bh4 $14) 24. Be5 $16 Bc5+ 25. Kg2 f5 26. g5 Kf7 27. Nc7 Rxc7 28. Bxc7 Bb4 29. Be5 Bxc3 30. bxc3 {[%mdl 4096] Endgame KRB-KRB} Re7 31. a4 Rd7 32. Bd4 a5 33. Kg3 Bb3 34. Rb2 Bxa4 35. Ra2 Bb3 36. Rxa5 Bd5 37. h4 g6 38. h5 gxh5 39. Kh4 Ke8 (39... Kf8 $16 {keeps fighting.} 40. Rb5 (40. Kxh5 Kg8 $16) 40... Ke7 41. Kxh5 Bf7+ 42. Kh4 Bg6) 40. Bf6 (40. Kxh5 $18 {and White stays clearly on top.} Bf7+ 41. Kh6) 40... Be6 41. Kxh5 {Hoping for Ra8+.} Bf7+ $2 {[%mdl 8192]} (41... Rd2 $16 42. Ra8+ Kf7 43. Ra7+ Bd7) 42. Kh6 $18 {White threatens Ra8+ and mate.} Bg6 43. c4 {[%cal Bc3c4,Bc4c5][%mdl 32]} Kf7 44. c5 Rd1 45. Ra7+ Kf8 46. Ra8+ (46. Rxh7 $142 Bxh7 47. Kxh7 Rh1+ 48. Kg6) 46... Kf7 47. Ra7+ Kf8 $1 {[%cal Rd1h1]} 48. Ra1 $2 (48. Rxh7 Bxh7 49. Kxh7 Rh1+ 50. Kg6) 48... Rd2 $2 (48... Rxa1 49. Bxa1 Ke7) 49. Ra8+ Kf7 50. Ra7+ Kf8 51. Ra8+ (51. Rxh7 $142 Bxh7 52. Kxh7 Rh2+ 53. Kg6) 51... Kf7 $1 {[%cal Rd2h2]} 52. Ra7+ Kf8 {[%cal Rd2h2]} 53. Ra8+ $2 {Weighted Error Value: White=0.65/Black=0.40} (53. Rxh7 $18 Bxh7 54. Kxh7 Rh2+ 55. Kg6) 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "2.2"]
[White "Nepomniachtchi, Ian"]
[Black "Grischuk, Alexander"]
[Result "1-0"]
[ECO "B94"]
[WhiteElo "2789"]
[BlackElo "2777"]
[Annotator "TA"]
[PlyCount "169"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,169,9,27,22,16,16,22,16,20,9,21,12,30,0,37,35,58,22,37,8,27,7,13,17,64,-24,-23,-21,-6,-4,-10,-14,-9,-12,0,0,0,1,35,0,31,0,0,0,0,0,0,0,30,26,48,48,48,50,60,67,100,111,111,111,120,75,80,0,113,50,50,48,45,17,65,52,60,63,62,56,140,127,191,191,259,183,405,397,397,368,368,89,89,89,89,89,89,89,89,89,89,89,491,491,491,491,491,491,491,204,491,491,499,0,481,190,481,362,365,420,190,190,190,190,458,190,190,190,481,190,190,190,280,190,190,0,481,481,481,481,607,481,481,481,481,481,29969,29970,29970,29971,29971,29971,29971,29973,29973,29973,29974,29975,29975,29976,29975,29976,29976,29977]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 Nbd7 7. Qe2 {B94: Sicilian Najdorf: 6 Bg5 Nbd7.} h6 8. Bh4 g6 9. O-O-O {The position is equal.} e5 10. Nb3 Be7 11. Kb1 b5 12. f3 Bb7 13. a3 Rc8 14. Qd2 Kf8 {[#]} 15. Bf2 $146 ({Predecessor:} 15. g4 Kg7 16. g5 hxg5 17. Bxg5 Qc7 18. h4 Nb6 19. Bxf6+ Bxf6 20. Qxd6 Rxh4 21. Rxh4 Bxh4 {½-½ (35) Naiditsch,Y (2387)-Zanan,E (2528) Caleta 2019}) 15... Kg7 16. g4 Nb6 17. h4 d5 18. Bxb6 (18. Bg3 $1 $14) 18... Qxb6 $11 19. Nxd5 Nxd5 20. exd5 Rhd8 21. Bd3 $1 Bxd5 22. Qe2 Qf6 23. Nd2 Qf4 24. h5 g5 25. Rhe1 b4 (25... Qa4 {is interesting.} 26. Bf5 Rb8 27. Be4 Be6 28. Bf5 Bd5) 26. Qxe5+ (26. a4 {keeps more tension.} b3 27. cxb3 Bb4 28. Qxe5+ Qxe5 29. Rxe5 a5 30. Rc1) 26... Qxe5 27. Rxe5 Bf6 28. Rxd5 Rxd5 29. axb4 Rb8 30. Bc4 Rd6 31. c3 Rbd8 32. Kc2 Be5 {aiming for ...Bf4.} 33. Be2 $1 Bf4 {[%cal Rd6d2]} 34. Ne4 Rxd1 35. Bxd1 $16 {[%mdl 4096] Endgame KRB-KBN} Re8 36. Nc5 Rd8 37. Ne4 Re8 38. Kd3 (38. Kb3 $1 $16) 38... Rd8+ $14 39. Ke2 Bc1 40. b3 Bf4 41. Bc2 Kf8 42. Bd3 Ra8 $1 43. Nc5 a5 (43... Re8+ $14 44. Be4 Rd8) 44. b5 $16 Ke7 (44... Re8+ $16 45. Be4 Rc8) 45. c4 Kd6 (45... Re8 $142 46. Be4 Rd8) 46. Na4 Ke5 $2 {[#]} (46... Rc8 {keeps fighting.} 47. Bf5 Rd8) 47. c5 $1 $18 Kd4 48. Be4 Re8 49. Kf2 $2 (49. b6 $18 {is more deadly.}) 49... Re5 $16 50. b6 {Hoping for c6.} Rxc5 51. Nxc5 Kxc5 {KB-KB} 52. b7 Kd4 53. Ke2 Kc3 54. Bd5 Kd4 $2 {[%mdl 8192]} (54... f6 $16 {is a better chance.}) 55. Bxf7 $18 Bb8 56. Kd2 Bf4+ 57. Kc2 Be5 58. Kb2 (58. Bg8 $142 Bd6 59. Bf7) 58... Bd6 $2 (58... Ke3+ 59. Ka3 Kxf3) 59. Bg8 Kd3 60. Bf7 Kd4 61. Bg6 $2 (61. Be6 Be5 62. Ka3) 61... Bc7 $2 (61... Bf4 {was called for.} 62. Kc2 Bc7) 62. Ka3 Kc5 63. Ka4 Kb6 (63... Kc6 {was worth a try.} 64. Be4+ Kc5) 64. Be4 Bd6 65. Bd5 Ka6 $2 (65... Kc5 {was necessary.} 66. Be6 (66. Kxa5 Kxd5 67. Kb6 Bb8 $17) 66... Kc6 67. Kxa5 Kxb7) 66. Be6 (66. b4 $142) 66... Kb6 67. Bc8 Bf4 $2 (67... Bb8 68. b4 axb4 69. Kxb4 Be5) 68. Ka3 $2 (68. b4) 68... Kc5 69. Bf5 Bd6 (69... Kb6 $142 70. Be4 Be5) 70. Ka4 Kb6 71. Bc8 $2 (71. Be6) 71... Bf4 $1 {[#]} 72. b4 $1 axb4 73. Kxb4 Kc6 74. Kc4 Be5 75. Bf5 Kxb7 {Black hopes to continue with ...Kc6.} 76. Kd5 Bb2 (76... Bf4 $18 77. Ke6 Kc8 78. Kf6+ Kd8) 77. Ke6 {White mates.} Kc7 78. Kf7 Kd6 79. Kg6 Ke7 80. Kxh6 Kf6 81. Bc2 Ba3 82. Kh7 Bf8 83. Bb3 Bg7 84. h6 Bf8 85. Ba2 {Weighted Error Value: White=0.32/Black=0.33} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "2.3"]
[White "Nakamura, Hikaru"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2736"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,76,23,4,42,14,13,-6,0,-33,-31,-29,-19,-14,0,0,-5,-11,-10,-10,-7,-7,-12,-24,-28,-21,-22,-25,-8,-8,-3,-8,0,-9,0,0,0,0,0,-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]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e3 Nc6 {6...cxd4 is the modern continuation.} 7. Bb5 Be7 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} 8. Ne5 Bd7 {[#] ...Nxc3 is the strong threat.} 9. Nxd7 Qxd7 10. O-O cxd4 11. exd4 {[#]} a6 $146 ({Predecessor:} 11... O-O 12. Qf3 Nxc3 13. bxc3 Rac8 14. Bf4 Rfd8 15. Bd3 e5 16. Be3 g6 17. Bc4 Bf8 {½-½ (27) Grabow,P (2127)-Hess,C (2225) Aalborg 2018}) 12. Be2 Bf6 13. Bf3 Nce7 14. Ne4 O-O 15. Nxf6+ Nxf6 16. Bg5 Nfd5 17. Qb3 Nf5 18. Be3 Rac8 19. Rac1 Nfe7 20. Bg5 {The position is equal.} Rxc1 21. Rxc1 Rc8 22. Rxc8+ Qxc8 23. g3 f6 24. Bd2 Qd7 25. Be4 g6 26. Bb4 Kf7 27. Bxe7 Kxe7 28. Kf1 Qc6 29. Bxd5 Qxd5 30. Qxd5 exd5 $11 {[%mdl 4096] Endgame KP-KP} 31. Ke2 Ke6 32. Ke3 g5 33. g4 a5 34. a4 Kd6 35. Kd3 Ke6 36. Ke3 Kd6 37. Kd3 Ke6 38. Ke3 Kd6 {Weighted Error Value: White=0.04/Black=0.04} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "2.4"]
[White "Vidit, Santosh Gujrathi"]
[Black "Dominguez Perez, Leinier"]
[Result "1-0"]
[ECO "E51"]
[WhiteElo "2726"]
[BlackElo "2758"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,93,4,7,0,0,0,0,0,0,0,2,0,0,9,8,0,-6,-2,8,7,14,12,24,31,22,31,23,27,16,23,29,17,15,36,20,19,37,8,33,30,48,21,54,48,59,57,160,147,130,92,160,157,233,227,233,239,524,524,524,524,517,515,508,508,508,508,491,490,476,473,426,335,389,397,460,448,764,750,899,880,731,689]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} Bb7 9. Bd3 Re8 {9...Nbd7 is setting a new trend.} 10. O-O {The position is equal.} Bf8 11. Ne5 c5 12. f4 Nc6 13. Ne2 Rc8 {[#]} 14. Be1 $146 ({Predecessor:} 14. Ng3 cxd4 15. Nxc6 Rxc6 16. Rxc6 Bxc6 17. exd4 Ne4 18. Bxe4 dxe4 19. Be3 Qd5 20. f5 Qxa2 {0-1 (37) Marn,J (2360)-Lampert,J (2531) Maribor 2020}) 14... cxd4 15. exd4 Ne4 16. Bb5 {[%cal Re5c6]} Re6 17. h3 f6 18. Nxc6 Bxc6 19. Ba6 Rc7 20. f5 Re8 21. Nf4 Ba4 22. b3 Rxc1 23. Qxc1 Bd7 24. Nxd5 {Black must now prevent Nc7.} Bd6 25. Bd3 $36 {[%mdl 2048] White is more active.} Qb8 26. Nc3 Nxc3 27. Bxc3 Bh2+ 28. Kh1 Bg3 29. Bd2 Rc8 (29... b5 $14) 30. Bc4+ $16 Kh8 {aiming for ...b5.} 31. Qd1 Qd6 {[#]} ({Black should play} 31... Bc6) 32. Qg4 $1 Re8 {[#]} (32... Bc6 $16 {might work better.} 33. Be6 Rd8) 33. Be6 $1 $18 Bxe6 34. fxe6 Rxe6 $2 {[#]} (34... Be5 35. dxe5 Qxd2) 35. Bb4 $1 {[%mdl 576] Deflection} Qxb4 36. Qxe6 {[%mdl 4096] Endgame Qe8+ would kill now. KQR-KQB} h6 37. Qc8+ Kh7 38. Qf5+ Kg8 39. Qd5+ Kh7 40. Qe4+ Kg8 41. Rc1 Kf7 42. Qd3 Qd6 43. Rc3 Bf2 44. Qc4+ {White is clearly winning.} Kg6 (44... Qe6 $142 45. Qxe6+ Kxe6) 45. Rf3 Bh4 46. d5 Bg5 47. h4 {Accuracy: White = 89%, Black = 62%.} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "2.5"]
[White "Radjabov, Teimour"]
[Black "Shankland, Sam"]
[Result "1-0"]
[ECO "D23"]
[WhiteElo "2765"]
[BlackElo "2691"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,89,1,-16,-7,-4,58,45,74,81,85,54,85,60,94,47,100,103,101,95,103,92,135,89,94,87,71,73,96,95,102,10,20,15,25,28,32,21,27,37,36,35,46,48,52,53,102,99,100,92,93,102,115,112,147,142,162,153,189,189,185,189,181,150,166,173,29974,29976,29975,29977,29968,1415,6726,5939]} 1. Nf3 d5 2. d4 Nf6 3. c4 c6 4. Qc2 dxc4 5. Qxc4 Bf5 6. g3 e6 7. Bg2 Be7 8. O-O O-O 9. Nc3 Nbd7 10. Bf4 Qb6 {D23: Queen's Gambit Accepted: 3 Nf3 Nf6 sidelines.} 11. Nh4 Bg4 {[#]} ({Much weaker is} 11... Qxb2 $6 12. Nxf5 exf5 13. Rab1 $16) ({Black should play} 11... Bc2 $11) 12. e4 $146 ({Predecessor:} 12. h3 Bh5 13. g4 Nd5 14. Bg3 Bxh4 15. Bxh4 Bg6 16. Na4 Qa5 17. Nc5 Nxc5 18. dxc5 {½-½ (44) Matviishen,V (2046)-Ziaziulkina,N (2330) Albena 2013}) 12... Rfe8 {White is slightly better.} 13. h3 Bh5 14. Rab1 Bf8 15. Be3 e5 16. d5 Qb4 ({Better is} 16... cxd5 $1 $14 17. Nxd5 Qa5) 17. Qxb4 $16 Bxb4 18. dxc6 bxc6 19. Rfc1 Rec8 20. Nf5 Bg6 21. a3 Bf8 22. Na4 c5 23. Rc2 Nd5 24. Bd2 (24. Rd1 $16 Nxe3 25. Nxe3) 24... N5b6 25. Nc3 c4 26. Be3 Nc5 27. g4 Rab8 28. Bf1 Rd8 29. Nb5 Rd7 30. Bxc5 Bxc5 31. b4 Bd4 32. Bxc4 ({And not} 32. Nbxd4 exd4 33. Bxc4 d3 $17) 32... Bxf5 33. exf5 Nxc4 34. Rxc4 Bb6 35. Nc3 Rd3 {[#]} 36. Kg2 $1 Bd4 37. Rc1 f6 38. Rc2 h5 39. Ne4 hxg4 40. hxg4 Rxa3 41. g5 Ra6 $2 {[#]} (41... fxg5 $18 42. Rc8+ Rxc8 43. Rxc8+ Kf7) 42. Rc8+ Rxc8 43. Rxc8+ Kf7 44. g6+ Ke7 45. Rg8 {Weighted Error Value: White=0.09/Black=0.39} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "2.6"]
[White "Ding, Liren"]
[Black "Bluebaum, Matthias"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2791"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "154"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,154,12,17,13,15,16,14,25,24,25,20,21,24,20,40,23,18,0,13,17,13,13,20,16,68,39,44,56,75,60,61,48,58,50,75,16,37,0,0,0,0,0,0,0,67,39,137,137,131,137,193,190,350,343,287,156,125,35,38,38,39,0,0,0,35,49,149,94,97,92,92,91,104,72,72,72,72,72,72,21,21,21,72,29,72,72,88,85,87,70,70,38,39,0,0,0,93,85,112,77,77,25,25,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 h6 7. Bh4 Be7 8. Bd3 O-O 9. Nge2 $1 {[%mdl 4] is recently more successful than 9.Qc2. D35: Queen's Gambit Declined: Exchange Variation.} Re8 10. O-O a5 {[#]} 11. Rc1 $146 ({Predecessor:} 11. Qd2 b6 12. Rac1 Ba6 13. Na4 Bxd3 14. Qxd3 Ne4 15. Bxe7 Rxe7 16. Ng3 Nxg3 17. hxg3 Re6 18. Rc2 Nd7 19. Rfc1 Qf6 20. Nc3 h5 {½-½ (20) Ramirez Alvarez,A (2516)-Murillo Tsijli,A (2352) San Jose 2004}) 11... Nbd7 12. f3 b5 13. Bf2 Nb6 14. Ng3 Bf8 15. h3 Nc4 16. Bxc4 dxc4 17. e4 b4 18. Na4 Ba6 19. Re1 g6 ({Black should try} 19... Bb5 $11) 20. Nf1 Nh5 21. Be3 Bg7 22. Nc5 Bb5 23. a4 bxa3 $1 24. bxa3 {Hoping for a4.} a4 $1 25. e5 (25. Qd2 $16) 25... Bf8 $1 $11 26. Nd2 Bxc5 27. dxc5 Rxe5 28. Ne4 $1 Qxd1 29. Rcxd1 g5 (29... f5 $11 30. Nd6 c3) 30. g4 $36 {[%mdl 3072] White has compensation. White has some pressure.} Ng7 (30... f5 $1 $14) 31. Bd4 $16 Re6 32. Bc3 $1 Kh7 (32... Rae8 $16 33. Nf6+ Rxf6 34. Bxf6 Rxe1+ 35. Rxe1 Ne6) 33. Rd7 $18 Kg6 (33... Kg8 {might work better.} 34. Kf2 Ba6) 34. h4 $1 {[%cal Rh4h5]} h5 35. gxh5+ ({Don't play} 35. hxg5 $6 hxg4 36. fxg4 Rh8 $18) ({Resist} 35. Nxg5 $6 Rxe1+ 36. Bxe1 Re8 $18) (35. Kf2 $18 hxg4 36. Rg1 (36. fxg4 gxh4 37. Rd6 Ne8 $15) (36. hxg5 gxf3 37. Kxf3 Rh8 $11) 36... Rxe4 37. fxe4) 35... Nxh5 $16 36. hxg5 (36. Kf2 $1 $16 Nf4 37. Rh1) 36... Nf4 $14 37. Kh2 Nd5 38. Bd4 c3 39. Rc1 Bd3 40. Nxc3 {And now Kg3 would win.} Nxc3 ({Better is} 40... Nf4 $1 $14) 41. Rxc3 ({White should play} 41. Bxc3 Bb5 42. Kh3) 41... Bf5 $16 {aiming for ...Re2+.} 42. Kg3 {Strongly threatening Kf4.} Kxg5 43. Rxf7 {Black must now prevent Rc1.} Rg8 44. Re3 (44. Kf2 {seems wilder.} Rge8 45. Rc4 Re2+ 46. Kg3 Be6 47. Rg7+) 44... Kg6 {[#]} 45. Rc7 Rxe3 46. Bxe3 {[%mdl 4096] Endgame KRB-KRB} Rc8 {[#]} 47. Ra7 (47. Rxc8 $1 $16 Bxc8 48. Kf4) 47... Bc2 $1 $11 48. Rd7 Kf6 (48... Kf5 $11) 49. Bd4+ Ke6 50. Rd6+ Ke7 51. Bf6+ Kf7 52. f4 Be4 53. Kg4 Rb8 54. f5 Rb3 55. Be5 Rd3 (55... Rxa3 $11 {keeps the balance.} 56. Rd7+ Ke8) 56. Rf6+ Kg8 57. Rg6+ (57. Kg5 {looks sharper.} Rd1 58. Rd6 Rf1 59. Bf4 Kf7 60. Rd7+) 57... Kf8 58. Re6 (58. Kg5 $16 Bd5 59. Bd6+ Kf7 60. Rf6+ Ke8 61. Rh6 Rxa3 62. Rh8+ Kd7 63. Rh7+ Ke8 64. Re7+ Kd8 65. f6) 58... Bd5 59. Rf6+ (59. Bd6+ {is more complex.} Kf7 60. Re1 Kf6 61. Be5+ Kf7 62. Kg5) 59... Ke7 {The position is equal.} 60. Rh6 Rxa3 61. Rh7+ Ke8 62. f6 Rf3 63. Re7+ Kd8 64. Ra7 a3 65. Bf4 a2 66. f7 {[%cal Rf7f8]} Rxf4+ $1 67. Kxf4 {[%cal Rf7f8]} Bxf7 $1 {KR-KB} 68. Ke5 {Threatens to win with Kd6.} Kc8 69. Kd6 Bd5 70. Ra3 Kb7 71. Kd7 Bc4 72. Kd6 Bd5 73. Ke5 Bc4 74. Kd4 Bd5 75. Kc3 Be6 76. Kb2 Bd5 77. Kc3 Be6 {Weighted Error Value: White=0.18/Black=0.20} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "2.7"]
[White "Carlsen, Magnus"]
[Black "Aronian, Levon"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "2862"]
[BlackElo "2781"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,93,23,12,13,16,20,0,0,0,11,6,5,9,40,37,34,32,57,58,79,85,72,70,116,115,145,106,160,168,188,183,194,189,212,195,227,232,258,259,253,247,454,452,493,481,520,539,582,568,581,589,1474,1213,29984,783,1438,1485,12837,12838,12838,12839,12839,12839,12840,12840,29981,29982,29985,29984,29988,29985,29981,0,29988,29989,29989,29990,29990,29991,29991,29992,29992,29993]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 O-O {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 8. e3 Bf5 9. Bd3 {9.Be2 gains popularity.} Bxd3 {The position is equal.} 10. Qxd3 Nbd7 11. Qb5 Bxc3+ 12. bxc3 Nb6 (12... Qc8 {is more complex.} 13. Bxf6 Nxf6 14. O-O c6 15. Qb3 c5) 13. Nd2 {[#]} Qd7 $146 ({Predecessor:} 13... c6 14. Qb3 Qe7 15. O-O g5 16. Bg3 Nh5 17. a4 Nxg3 18. hxg3 Rab8 19. a5 Nd7 {½-½ (41) Nechaeva,M (2424)-Kashlinskaya,A (2452) St Petersburg 2017}) 14. Qxd7 Nfxd7 15. a4 a5 16. Ke2 {Black is on the road to losing.} Rfe8 17. Rhb1 Re6 18. Bg3 c5 19. Rb5 c4 ({Black should try} 19... cxd4 20. cxd4 Rc6) 20. Bc7 $16 Rc6 21. Bxb6 Nxb6 22. g4 Kf8 23. h4 Ke8 24. e4 Rd8 25. e5 (25. Rxa5 $6 dxe4 26. Nxe4 Nd5 $16) 25... f6 26. f4 (26. Rxa5 $6 fxe5 27. Nf3 (27. dxe5 d4 $16) 27... e4 $16) 26... g5 $2 (26... Kd7 27. Nf3 (27. Rxa5 Ra8 $16) 27... Kc7) 27. hxg5 $18 hxg5 28. f5 fxe5 29. dxe5 d4 30. Rh1 dxc3 31. Ne4 c2 32. e6 Rd4 33. Re5 (33. Rh8+ $142 Ke7 34. Rh7+ Kd8 35. e7+ (35. Rh8+ Kc7 $17) 35... Ke8 36. Re5 Rxe4+ 37. Rxe4 Nc8 38. Rh8+ Kd7 39. e8=Q+ Kc7 40. Qxc8+ Kb6 41. Qd8+ {[%mdl 64] Double Attack} Ka6 42. Re5) 33... Nd5 {[#]} 34. Rxd5 $1 {[%mdl 512]} Rxe4+ {[%mdl 4096] Endgame KRR-KRR} (34... Rxd5 35. Nf6+) 35. Kd2 Rxg4 36. Rh8+ Ke7 37. Rh7+ Ke8 38. f6 {[%cal Rh7h8]} c1=Q+ 39. Kxc1 {[%cal Rh7h8]} Rg1+ 40. Kc2 {[%cal Rh7h8]} Rg2+ 41. Kd1 {[%cal Rh7h8]} Rg1+ 42. Kc2 {[%cal Rh7h8]} Rg2+ (42... Rxe6 43. f7+ Ke7 {[#]} 44. Rd7+ $3 {[%mdl 512]} Kxd7 45. f8=Q+ Kc6 46. Qc8+ Kd6 47. Qc7+ Kd5 48. Qxb7+ Kd4 49. Qd7+ Ke5 50. Qb5+ {[%mdl 64] Double Attack} Ke4 51. Qxc4+ {[%mdl 64] Double Attack} Ke5 52. Qc5+ {[%mdl 64] Double Attack} Ke4 53. Qc4+ Ke5 54. Qc5+ Ke4 55. Qxg1) 43. Kc3 {[%cal Rh7h8] White mates.} Rg3+ 44. Kd4 {[%cal Rh7h8]} Rd3+ 45. Ke5 {[%cal Rh7h8]} Re3+ 46. Kf5 {[%cal Rh7h8]} Rcxe6 47. Rh8+ {Weighted Error Value: White=0.16/Black=0.52} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "2.8"]
[White "Vachier-Lagrave, Maxime"]
[Black "So, Wesley"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "2784"]
[BlackElo "2770"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,107,20,21,14,23,18,20,9,16,0,7,0,-2,-10,-5,-9,-7,-18,-24,-6,0,-13,-10,-21,-12,-16,-9,-36,0,0,0,0,8,8,8,8,8,0,8,8,8,8,8,8,11,13,28,26,27,27,77,34,57,77,78,32,41,35,47,5,66,64,68,0,65,59,167,221,199,150,401,397,944,551,503,370,1286,1193,1936,1814,2793,2233,5624,3901,5214,5122,29982,29983,29983,29982,29987,29988,29988,29989,29989,29990,29995,29992,29996,29997]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Bxc6 dxc6 6. Nbd2 {C65: Ruy Lopez: Berlin Defence (3...Nf6), unusual lines and 4 0-0 Bc5.} Be6 7. O-O Bd6 8. Nb3 {[#] The position is equal.} b6 $146 ({Predecessor:} 8... a5 9. Qe1 a4 10. Na5 Qb8 11. b4 Bg4 12. Nh4 O-O 13. Nc4 Be6 14. Nxd6 cxd6 {1-0 (31) Dominguez Perez,L (2763)-Aronian,L (2765) Saint Louis 2019}) 9. d4 Nd7 (9... Nxe4 $6 10. Qe2 $16) 10. dxe5 Nxe5 11. Nxe5 Bxe5 12. Qh5 Bf6 13. Rd1 Qc8 14. h3 O-O 15. e5 {[#]} g6 $1 16. Qe2 Bg7 17. Bf4 c5 18. Nd2 Qb7 19. Ne4 Bd5 20. Nf6+ Bxf6 21. exf6 Bxg2 {Threatens to win with ...Bf3.} 22. Qg4 Qf3 23. Bh6 Qxg4 24. hxg4 Bf3 {[%mdl 64] Double Attack} 25. Bxf8 Bxd1 26. Rxd1 {Black must now prevent Bh6.} Rxf8 $11 {[%mdl 4096] Endgame KR-KR} 27. Rd7 g5 28. Rxc7 h6 29. Rxa7 Rd8 30. Ra6 Rd2 31. Rxb6 {Hoping for c3.} Rxc2 32. Kg2 Kh7 $1 33. Kf3 Rc4 34. Rc6 {next b3 is good for White.} Kg6 (34... Rf4+ $11 35. Kg3 Rc4) 35. b3 $14 Rc2 36. b4 (36. a4 $1 $14) 36... Rc3+ (36... Rxa2 $11 37. Rxc5 (37. bxc5 Ra4 $11) 37... Rb2) 37. Ke2 $1 Rc4 (37... cxb4 $2 38. Rxc3 bxc3 39. a4 $18) (37... Ra3 $14) 38. b5 $18 ({And not} 38. bxc5 Rxg4 39. Kd3 Ra4 $11) (38. Rxc5 Rxb4 39. Kf3 Ra4 $15) 38... Rxg4 39. a3 {[%cal Ba2a3,Ba3a4,Ba4a5,Ba5a6][%mdl 32] Strongly threatening b6.} ({Weaker is} 39. Rxc5 Ra4 $11) 39... Rg1 $2 {This move loses the game for Black.} (39... Ra4 $16) 40. b6 Ra1 $2 (40... h5 41. a4 (41. Rxc5 Rb1 $15) 41... h4) 41. Rc8 {b7 is the strong threat.} Rb1 {[#]} 42. Rb8 h5 $2 (42... Kxf6 43. a4 Rb2+ 44. Kd3 Ra2) 43. b7 Kh7 44. a4 h4 45. Kf3 h3 46. Kg3 g4 47. a5 Rb3+ {[#]} 48. Kh2 $1 {White mates.} Rb2 49. a6 Rxf2+ 50. Kg3 Rg2+ 51. Kf4 h2 {[#]} 52. Rh8+ $1 {[%mdl 576] Decoy, Clearance, Promotion} Kxh8 (52... Kg6 53. b8=Q) 53. b8=Q+ Kh7 54. Qf8 {[%csl Gf6][%cal Rf8g7] Weighted Error Value: White=0.19/Black=0.34} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "3.1"]
[White "So, Wesley"]
[Black "Dubov, Daniil"]
[Result "1-0"]
[ECO "B30"]
[WhiteElo "2770"]
[BlackElo "2710"]
[Annotator "TA"]
[PlyCount "141"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,141,24,20,29,39,51,46,69,59,63,61,77,28,19,23,28,-4,0,0,0,0,0,0,0,-36,-20,-24,-31,-33,0,-31,0,0,0,0,0,0,22,0,0,0,0,0,0,0,0,-27,-25,-16,-23,-86,-86,-77,-84,-72,-86,-89,-43,-174,-162,-177,-199,-173,-191,-187,-184,-160,-119,-115,-108,-129,-128,-121,-119,-117,8,12,58,85,406,402,374,233,231,231,231,220,503,495,483,475,607,614,629,643,614,588,721,723,714,714,656,685,736,717,820,696,943,935,842,732,939,911,954,948,1077,964,1558,1483,1200,425,425,447,455,0,5928,11360,29980,29980,29979,29979,29978,29978]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e6 4. O-O Nge7 5. d4 cxd4 6. Nxd4 Ng6 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} 7. Be3 Qc7 8. Be2 Be7 {White is slightly better.} 9. c4 O-O 10. Nc3 b6 11. Rc1 (11. Ndb5 $5 {[%cal Rb5c7]} Qb8 12. Qd2 $14) 11... Nxd4 12. Qxd4 Bb7 {[#]} 13. g3 $146 ({Predecessor:} 13. Nb5 Qc6 14. Qd2 a6 15. Nd4 Qc7 16. f3 Bd6 17. g3 Bxg3 18. hxg3 Qxg3+ 19. Kh1 Qh3+ 20. Kg1 f5 21. Nc2 fxe4 22. f4 Qg3+ 23. Kh1 Nxf4 24. Rf2 Qxf2 {0-1 (24) Madiai,F (2227)-Jumabayev,R (2600) Riga 2015}) 13... Bf6 14. Qd3 Bxc3 15. Rxc3 f5 16. exf5 Rxf5 (16... Qc6 $5 17. f3 $8 Rxf5 $11) 17. f3 Raf8 {aiming for ...Ne5.} 18. Qd1 Ne5 {[%cal Re5f3]} 19. Bd4 g5 20. Qd2 g4 ({Better is} 20... Qd6 $15) 21. f4 $11 Qc6 {[%csl Gb7][%cal Rc6g2]} 22. Kf2 Ng6 {White must now prevent ...e5.} 23. Bxg4 e5 24. Bxf5 (24. Bf3 Qc7 $15) 24... exd4 $40 {[%mdl 128] Black has some attack.} (24... Rxf5 $2 25. Be3 $18) 25. Qxd4 Rxf5 26. Re3 Rc5 27. b3 b5 $1 {[%cal Rb5c4]} 28. Re8+ Kf7 29. Rd8 Nf8 {[%cal Rb5c4]} 30. Rb8 (30. Rd1 $11 {remains equal.} bxc4 31. bxc4) 30... Ne6 {[%mdl 1024] Black has strong compensation.} 31. Qd3 Rh5 {Hoping for ...bxc4.} 32. h4 bxc4 33. bxc4 Qc7 34. Rh8 (34. Rb1 $15 Nxf4 35. Qxd7+ (35. gxf4 Qxf4+ {[%mdl 64] Double Attack} 36. Kg1 Qg4+ 37. Kf2 Qf4+ 38. Kg1 Qg4+ 39. Kf2 Be4 $19 {[%mdl 64] Skewer}) 35... Qxd7 36. R1xb7 Nd3+ 37. Kg2) 34... Qb6+ $19 35. Ke1 Nc5 36. Qe2 {Intending Qe8+ and mate.} Qa5+ 37. Kf2 {White threatens Qe8+ and mate.} Ne4+ 38. Kg1 Qb6+ ({Inferior is} 38... Nxg3 39. Qe8+ Kf6 40. Rf8+ Kg7 41. Qe7+ Kh6 42. Rf6#) 39. Kh2 Qg6 40. Rf3 Qg4 41. Re3 Qxe2+ 42. Rxe2 Bc6 (42... Nf6 $1 $17) 43. Kh3 $1 $11 Kg7 (43... Nc3 $5 {[%cal Rc3e2]} 44. Rc2 Ne4 $14) 44. Re8 {White leaves nothing to chance now.} d5 {[%mdl 8192]} (44... Nd6 $16 {is tougher.}) 45. Re7+ $18 {[%mdl 64] Double Attack} Kf8 46. Rc7 Rh6 47. cxd5 ({Stronger than} 47. Rxa7 d4 $11) 47... Bxd5 48. Rb2 {[%cal Rb2b8]} Nd6 $2 (48... Rb6 49. Rxb6 axb6 50. Rxh7 Nf2+ 51. Kh2 Bxa2) 49. Rb8+ Ne8 50. Rxa7 Rc6 51. Rxh7 Be6+ 52. g4 Rc3+ 53. Kh2 Bg8 54. Rh8 Re3 55. a4 {[%cal Ba2a4,Ba4a5,Ba5a6][%mdl 32]} Kg7 56. Rh5 Nf6 57. Rg5+ Kf7 58. a5 Bh7 59. Rb7+ Kf8 60. Rb6 Kf7 61. f5 Ne4 62. a6 Re2+ 63. Kg1 Nd2 64. Rb7+ Kf6 65. Rxh7 {[%mdl 4096] Endgame KRR-KRN} (65. a7 $142 Re1+ 66. Kf2) 65... Nf3+ 66. Kf1 Rd2 {intending ...Nh2+.} 67. Rh6+ $2 ({White must play} 67. Rg6+ $18 Ke5 68. Re6+ Kf4 69. Re2 Rd1+ 70. Kg2 Rg1+ 71. Kf2) 67... Ke5 $2 {[%mdl 8192]} (67... Kf7 $11) 68. f6+ $1 Kf4 {[#]} 69. Rf5+ $1 {White mates.} Kg3 {[#]} 70. Rxf3+ $1 {[%mdl 64] Remove Defender} Kxf3 {[#]} 71. Ke1 $1 {Weighted Error Value: White=0.15/Black=0.35} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "3.2"]
[White "Aronian, Levon"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1-0"]
[ECO "B68"]
[WhiteElo "2781"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,87,34,44,0,14,10,0,6,23,2,12,12,0,0,0,-7,0,0,0,0,-25,-43,-21,-14,-21,-33,-46,-78,-74,-69,-68,-77,-80,-86,0,0,59,54,70,58,35,58,187,188,217,196,216,208,244,248,262,250,247,210,227,175,172,173,179,181,182,177,182,158,391,378,613,601,582,568]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f4 Be7 10. Nf3 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 11. Kb1 {B68: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 Bd7 9 f4 Be7 .} b4 12. Bxf6 Bxf6 13. Ne2 {[%cal Bc3e2,Be2f4,Bf4d5][%mdl 32] The position is equal.} Be7 14. f5 exf5 15. exf5 {[#]} Bxf5 $146 ({Predecessor:} 15... O-O 16. g4 a5 17. Ng3 a4 18. Bc4 b3 19. cxb3 Na5 20. Bd5 axb3 21. a3 Bc6 22. Bxc6 Nxc6 {0-1 (58) Sattarov,B (2459)-Maghsoodloo,P (2676) Lichess.org INT 2020}) 16. Nf4 O-O 17. Bd3 Bxd3 18. Qxd3 Re8 19. h4 Ne5 20. Qb3 Qc8 21. Nd5 Rb8 22. Rd4 a5 23. Rf4 Bf8 24. Ng5 Qb7 {And now ...a4! would win.} 25. Rd1 h6 26. Nf3 a4 (26... Qa7 $17 {White must now prevent ...a4.} 27. Re4 Rbc8) 27. Qxb4 $11 ({Avoid the trap} 27. Qxa4 $2 Nxf3 28. a3 Ne5 $19) 27... Nxf3 (27... Qxd5 $11 28. Rxd5 Rxb4 29. Rxb4 Nxf3) 28. Qxb7 $14 ({But not} 28. gxf3 $2 Qxd5 $3 {[%mdl 512]} 29. Rfd4 Qxf3 $19) 28... Nd2+ 29. Kc1 Rxb7 30. Rxd2 a3 {[#]} (30... Re1+ $14 31. Rd1 Rxd1+ 32. Kxd1 Rxb2) 31. b4 $1 $18 Re1+ 32. Rd1 Re2 33. g3 g6 34. Rf3 Ra7 35. Rdd3 Re5 36. c4 Re1+ 37. Kd2 Ra1 38. Rxa3 Rxa2+ 39. Rxa2 Rxa2+ {KRB-KRN} 40. Kc1 Bg7 41. b5 {[%cal Bb4b5,Bb5b6][%mdl 32]} Ra4 $2 (41... Ra7 $16 {is a better defense.} 42. Kc2 Bd4) 42. b6 Rxc4+ $2 (42... Bd4 43. Rb3 Rxc4+ 44. Kd2 Bxb6) 43. Kb1 {aiming for b7.} Ra4 44. Rb3 {Weighted Error Value: White=0.06/Black=0.30} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "3.3"]
[White "Bluebaum, Matthias"]
[Black "Carlsen, Magnus"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "2670"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "114"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,114,8,0,0,7,8,2,7,9,9,9,13,0,0,0,6,0,0,-6,0,-8,-14,-8,10,-76,-75,-69,-6,-77,-72,-86,-69,-107,-98,-100,-95,-135,-158,-159,-67,-114,-92,-68,-76,-69,-77,-269,-276,-279,-281,-271,-275,-281,-274,-279,-278,-277,-287,-285,-268,-250,-141,-294,-290,-294,-291,-417,-306,-108,-300,-305,-303,-299,-297,-303,-301,-345,-346,-359,-324,-489,-478,-370,-363,-552,-552,-538,-539,-496,-480,-522,-487,-503,-408,-398,-387,-385,-352,-352,-350,-586,-582,-1740,-2083,-1136,-1329]} 1. d4 d5 2. Nf3 e6 3. e3 Nf6 4. Bd3 c5 5. b3 Nc6 6. O-O b6 {D05: Colle System with ...e6.} 7. Bb2 Bb7 8. Nbd2 Rc8 {The position is equal.} 9. a3 cxd4 10. exd4 g6 11. Qe2 Bg7 12. Ne5 O-O {[#]} 13. Rac1 $146 ({Predecessor:} 13. f4 Ne7 14. g4 Ne8 15. a4 Nd6 16. Ba3 Re8 17. Rad1 Qc7 18. Bxd6 Qxd6 19. Qe3 {1-0 (37) Krush,I (2422)-Kovalevskaya,E (2407) Moscow 2019}) 13... Ne7 14. a4 Nf5 15. c3 Re8 16. Ba3 Qc7 17. Rc2 (17. g4 $11 {remains equal.} Nd6 18. f3) 17... Ne4 $1 $17 {[%cal Re4c3]} 18. Bb2 {[#]} f6 ({Black should play} 18... Nc5 $1 $15 19. Bb5 Red8 $1) 19. Nef3 (19. Ng4 $1 $11) 19... e5 $1 {Hoping for ...Nxd2.} 20. dxe5 Nxd2 21. Qxd2 fxe5 {Strongly threatening ...e4.} 22. Bxf5 gxf5 23. Nh4 f4 24. Nf5 Bf6 (24... Bf8 $1 $17 {aiming for ...d4!} 25. Qd1 Qf7) 25. c4 d4 ({Reject} 25... dxc4 $6 26. Rxc4 Qd8 27. Nh6+ Kg7 28. Nf5+ Kg8 29. Nh6+ Kg7 30. Nf5+ Kg8 $11) 26. Nh6+ Kh8 {Threatens to win with ...Qg7!} 27. f3 Rcd8 28. Rcc1 $2 (28. Ng4 $17 Bh4 29. Kh1) 28... Bc8 $1 $19 29. h3 Qg7 30. Ng4 Bh4 31. Rcd1 h5 32. Nxe5 Rxe5 ({Not} 32... Qxe5 33. Bxd4 Rxd4 34. Qxd4 $11) 33. Bxd4 {[#]} Rxd4 {[%mdl 512]} 34. Qxd4 {[#]} Bxh3 $1 {[%csl Gh3][%cal Rg7g2]} 35. Rd2 Kh7 (35... Bf6 $19 36. Qxf4 {[#]} Bg5 $1 {[%mdl 64] Skewer}) 36. Rfd1 $2 (36. Ra2 $17 {was worth a try.}) 36... Bf5 37. b4 Be7 38. Qb2 (38. Qxf4 $142 Bg5 {[%mdl 64] Skewer} 39. Qh2 Be3+ 40. Kf1 Bxd2 41. Rxd2) 38... Re3 39. Qxg7+ Kxg7 40. c5 bxc5 41. bxc5 Bxc5 42. Rd5 Rc3+ 43. Kh2 Kf6 44. a5 Bf2 45. Kh1 (45. R5d2 $142 Bc5 46. Rd8) 45... Ra3 46. Rd6+ Be6 47. Ra6 (47. Rf1 $142 Bc5 48. Ra6) 47... Ke5 48. Rc1 h4 49. Rb1 Bc4 50. Rh6 Bg3 51. Rd1 Bd3 52. a6 Bf5 53. Rc1 Kd4 54. Rf6 Bd3 55. Re6 $2 (55. Rd1) 55... Bxa6 {Black is clearly winning.} 56. Rd6+ Ke3 57. Re6+ Kd2 {Weighted Error Value: White=0.41/Black=0.11} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "3.4"]
[White "Shankland, Sam"]
[Black "Ding, Liren"]
[Result "1-0"]
[ECO "E12"]
[WhiteElo "2691"]
[BlackElo "2791"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,107,5,16,16,8,14,10,14,18,0,0,0,8,0,18,12,18,11,14,0,0,0,0,0,0,0,0,2,6,13,11,9,9,0,4,-17,-18,-13,-12,-60,-8,-6,0,0,0,0,0,0,0,-6,0,0,0,0,12,12,112,0,27,-71,-82,-243,-283,-232,0,0,0,0,0,0,0,0,0,0,0,0,0,3,54,55,175,158,617,512,29964,29966,29970,29969,29969,29970,29969,29968,29976,29977,29977,29978,29979,29980,29980,29981]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Bf4 c5 6. Nc3 {[%cal Bb1c3,Bc3b5,Bb5d6][%mdl 32] E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7 .} cxd4 7. Qxd4 Nc6 8. Qd3 {The position is equal.} Nh5 9. Bg5 Be7 10. Bxe7 Qxe7 11. Nb5 {Strongly threatening Nc7+.} O-O 12. Nd6 {[#]} Nd8 $146 ({Predecessor:} 12... Na5 13. Rd1 Bc6 14. b4 Nb7 15. Nxb7 Bxb7 16. Qxd7 Qf6 17. Qd4 Rfd8 18. Qxf6 Rxd1+ 19. Kxd1 Nxf6 20. Nd2 {½-½ (20) Morrow,W (2507)-Edwards,J (2531) ICCF email 2019}) 13. Rd1 Bc6 14. e3 Nf6 15. Be2 Nb7 16. O-O Nxd6 17. Qxd6 Qxd6 18. Rxd6 Bxf3 19. Bxf3 Rac8 20. b3 Rfd8 21. Rfd1 Kf8 22. Bc6 Ke7 23. Bb5 Rc7 24. R6d3 g5 (24... Ne4 $1 $15 25. b4 d5) 25. f3 $11 h5 26. Kf2 h4 27. e4 e5 28. b4 g4 29. a4 Rg8 30. Rd6 Rg6 {aiming for ...Nxe4+!} 31. Ke2 g3 32. h3 Rg8 (32... Ke8 $11) 33. Ke3 (33. f4 $1 $16) 33... Ra8 34. a5 (34. f4 $1 $11 {keeps the balance.} exf4+ 35. Kf3 (35. Kxf4 a6 $15)) 34... bxa5 $17 35. bxa5 $2 (35. f4 $17 {was forced.} exf4+ 36. Kxf4) 35... a6 $1 $19 {[%cal Ra6b5]} 36. Bxa6 Rca7 $2 ({Black should try} 36... Nh5 $1 $19 {White must now prevent ...Nf4.} 37. f4 Nxf4) 37. Bb5 $36 {[%mdl 2048] White has some pressure.} Rxa5 38. f4 $1 {[%cal Rf4e5]} ({Avoid the trap} 38. Bxd7 $2 Rd8 $19) 38... Ra3+ 39. R6d3 d6 {...Nh5 is the strong threat.} 40. c5 $1 {[%cal Rc5d6]} exf4+ 41. Kxf4 Rxd3 42. Rxd3 dxc5 {[%mdl 4096] Endgame KRB-KRN} 43. e5 Ne8 (43... Nh5+ $11 44. Kg4 Ng7) 44. Rd7+ $14 {[%mdl 1024] White has compensation.} Kf8 {[#]} (44... Ke6 $14) 45. Kg5 $1 $18 {Hoping for Bc4.} Ng7 $2 {[#]} (45... Rc8 $16) 46. Bc4 $1 Ne6+ (46... Ke8 $18 47. Rxf7 Ra4) 47. Kf6 {White mates.} Nd8 48. Bxf7 Nxf7 49. Rxf7+ {KR-KR} Ke8 50. Rh7 Ra2 51. Rh8+ Kd7 52. e6+ Kc6 53. e7 Rf2+ 54. Kg5 {Quite a comeback for White.  Weighted Error Value: White=0.13/Black=0.39} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "3.5"]
[White "Dominguez Perez, Leinier"]
[Black "Radjabov, Teimour"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2758"]
[BlackElo "2765"]
[Annotator "TA"]
[PlyCount "168"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,168,13,27,16,16,1,31,23,14,28,11,22,19,0,9,8,18,10,7,6,7,11,10,9,17,14,14,9,45,57,37,23,47,32,0,0,0,23,0,12,12,17,12,13,14,16,14,15,15,15,15,15,15,15,15,35,35,35,0,0,0,35,35,35,35,35,35,35,35,35,35,35,35,35,20,20,20,20,20,20,20,20,20,20,0,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,20,0,20,20,20,20,20,20,20,20,20,20,20,0,0,0,0,-8,-8]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb5 d6 6. N1c3 a6 7. Na3 b5 8. Nd5 Nf6 9. Bg5 Be7 10. Bxf6 Bxf6 11. c3 Bg5 12. Nc2 Rb8 {12...Ne7 is the recent fashion.} 13. a4 bxa4 {B33: Sicilian: Pelikan and Sveshnikov Variations.} 14. Ncb4 Nxb4 15. cxb4 O-O {White is slightly better.} 16. Rxa4 a5 17. h4 (17. Rxa5 $2 Rxb4 $3 {[%mdl 512]} 18. Ra4 Rxb2 $19) (17. bxa5 Rxb2 18. Bd3 Bd7 $17) 17... Bh6 18. b5 ({Stronger than} 18. Rxa5 {[#]} Rxb4 $3 {[%mdl 512]} 19. Ra8 Rxe4+ 20. Be2 Rd4 $19) (18. bxa5 Rxb2 19. Qa1 Rc2 $17) 18... Kh8 19. Be2 Be6 20. b4 axb4 21. Nxb4 Bd7 22. Qd5 Rc8 23. Nc6 Qb6 {[%cal Rc8c6]} 24. Ra6 Bxc6 25. bxc6 Qb4+ 26. Kf1 f5 27. exf5 Qb1+ 28. Bd1 {[#]} Rxf5 $146 ({Predecessor:} 28... Qxf5 29. Ra2 Qb1 30. g4 Be3 31. Kg2 Bb6 32. Bf3 Qg6 33. h5 Qg5 34. Rb1 Bd4 {½-½ (65) Sekowski,P (2324)-Slawinski,T (2405) ICCF email 2018}) 29. Rh3 {aiming for c7.} e4 $1 30. Qb3 {[%cal Rb3b1]} Rb5 31. Qc2 (31. Qxb1 {keeps more tension.} Rxb1 32. Ke2 Rc1 33. Rha3 g6 34. R3a4) 31... Rb2 (31... Qxc2 {is more complex.} 32. Bxc2 d5 33. Bd1 Rb1 34. Ke1 Rc1) 32. Qxb1 Rxb1 33. Ke2 Rc1 34. Rha3 g6 35. Bb3 R1xc6 36. Rxc6 Rxc6 $11 {[%mdl 4096] Endgame KRB-KRB} 37. Ra8+ Kg7 38. g4 Bf4 39. g5 {[%csl Gb3][%cal Ra8g8]} h6 40. Ra7+ {[%mdl 1024] White has compensation.} Kh8 41. Ra8+ (41. h5 $5 d5 42. Bxd5 Rc2+ 43. Kf1 hxg5 44. hxg6 $14) 41... Kg7 42. Ra7+ Kh8 43. h5 d5 ({Worse is} 43... gxh5 44. g6 Rc2+ 45. Kf1 Rc1+ 46. Kg2 d5 47. Rh7+ Kg8 48. Bxd5+ Kf8 49. Rf7+ Ke8 50. g7 Rg1+ 51. Kxg1 Bh2+ 52. Kxh2 h4 53. g8=Q#) ({And not} 43... hxg5 44. hxg6 d5 45. Rh7+ Kg8 46. Bxd5+ Re6 47. Bxe6+ Kf8 48. Rf7+ Ke8 49. g7 Bd6 50. g8=Q+ Bf8 51. Qxf8#) 44. Bxd5 Rc2+ 45. Kf1 hxg5 46. hxg6 {[%csl Gg6][%cal Ra7h7]} Rc7 47. Ra8+ Kg7 48. Bxe4 g4 49. Ke2 Re7 {The position is equal.} 50. Kd3 g3 51. fxg3 Bxg3 52. Ra6 (52. Ke3 {with more complications.} Be5 53. Bf5 Kh6 54. Kf3 Rc7 55. Be4) 52... Bf4 53. Ra4 Bg5 54. Ra6 Bf4 55. Rc6 Bg5 56. Bf5 Re3+ 57. Kd4 Re7 58. Bc2 Be3+ 59. Kd5 Bf4 60. Ra6 Re5+ 61. Kd4 Re7 62. Ra5 (62. Bf5 {is interesting.} Be3+ 63. Kd3 Bf4 64. Be4 Be5 65. Ke2) 62... Be3+ 63. Kd5 Bf4 {And now ...Re5+ would win.} 64. Ra4 (64. Ra3 {feels hotter.} Re5+ 65. Kd4 Re7 66. Rh3 Bb8 67. Bb1) 64... Re5+ 65. Kd4 Re7 66. Ra8 Be3+ 67. Kd5 Bf4 68. Ra1 Re5+ 69. Kd4 Re7 {...Be5+ is the strong threat.} 70. Rh1 Bg3 71. Rh3 Bb8 72. Kd5 Bf4 73. Rh5 Bc7 74. Rh7+ Kf6 75. Rh1 Kg7 76. Rh7+ Kf6 77. Rh8 Kg7 78. Rc8 Bf4 79. Ra8 Bg3 80. Ra3 Bf4 81. Rf3 Bb8 82. Rf7+ {[%mdl 64] Decoy} Rxf7 83. gxf7 Kxf7 84. Bg6+ Kg7 {Weighted Error Value: White=0.04/Black=0.01} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "3.6"]
[White "Duda, Jan-Krzysztof"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1/2-1/2"]
[ECO "D32"]
[WhiteElo "2743"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "220"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,220,12,10,18,6,16,2,17,0,0,0,18,11,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,52,-2,79,90,77,75,84,70,62,63,60,68,57,64,55,70,70,62,61,8,9,10,6,6,4,0,0,0,8,8,8,8,8,8,31,31,31,31,31,8,8,8,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,0,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,8,31,31,31,31,31,31,31,0,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,0,31,31,31,31,31,31,31,31,31,31,31,31,31,0,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,31,0,31,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. e3 Nc6 6. cxd5 exd5 7. Bb5 cxd4 8. Nxd4 Bd7 9. O-O Bd6 {D32: Tarrasch Defence: Sidelines and lines without g3.} 10. Nf3 Bg4 11. h3 Bh5 12. Be2 O-O 13. b3 (13. Nxd5 $2 Nxd5 14. Qb3 Qd7 $1 $19) 13... a6 14. Bb2 (14. Nxd5 $2 Nxd5 15. Bb2 {[#]} Re8 $1 $19) 14... Re8 15. Nh4 ({Don't go for} 15. Nxd5 $2 Nxd5 16. Nd4 (16. Qxd5 $2 Bh2+ {[%mdl 64] Discovered Attack} 17. Nxh2 Qxd5 $19) 16... Bxe2 $19) 15... Bg6 16. Nxg6 hxg6 17. Bf3 Be5 {[#]} 18. Na4 $146 ({Predecessor:} 18. Rb1 d4 19. exd4 Nxd4 20. Bxb7 Ra7 21. Bf3 Rd7 22. Na4 Bb8 23. Bxd4 Rxd4 {½-½ (56) Carlsen,M (2832)-Grischuk,A (2750) chess.com INT 2017}) 18... Bxb2 19. Nxb2 Ne4 20. Rc1 Qf6 21. Na4 Rad8 22. Nc5 Re7 (22... Nxc5 $11 23. Rxc5 d4 24. Bxc6 dxe3) 23. Rc2 ({White should play} 23. Bxe4 $14 dxe4 24. Qe2) 23... Kh7 (23... Ng5 $11) 24. Bxe4 $16 dxe4 25. Qg4 Rde8 26. Rd1 Nb4 27. Rc4 Nxa2 28. Rdd4 {[%cal Rc5e4]} Qf5 29. Nxe4 Qxg4 30. hxg4 a5 31. Nd6 Rd8 32. f4 (32. Rc5 $14) 32... f6 $11 33. Kf2 Nb4 34. g5 (34. Ke2 {with more complications.} Nc6 35. Rd2 Red7 36. Ne4 Rxd2+ 37. Nxd2 Rd5 38. Rc3) 34... Nc6 35. gxf6 gxf6 36. Nxb7 Rxd4 (36... Nxd4 {is interesting.} 37. Nxd8 Nxb3 38. Nc6 Re6 39. Nd4 Nxd4 40. Rxd4 Ra6) 37. exd4 {d5 is the strong threat.} Rxb7 38. Rxc6 Rxb3 39. Rxf6 {[%mdl 4096] Endgame KR-KR} a4 40. Rf7+ Kg8 41. Ra7 a3 42. Ke2 Rg3 43. d5 {aiming for d6.} Kf8 (43... Rxg2+ {is interesting.} 44. Kf3 Ra2 45. Ke4 Ra1 46. Ke5 a2) 44. Kf2 Rd3 45. d6 Rxd6 46. Rxa3 Kf7 47. Kf3 Kf6 48. Ra5 Rb6 49. Kg4 Rc6 50. Rd5 Rb6 51. Rc5 Ra6 52. Rd5 Rb6 53. Kh4 Ra6 54. g4 Rb6 55. Kg3 Rb3+ 56. Kf2 Ra3 57. Rd6+ Kf7 58. Rb6 Rc3 59. Ra6 Rb3 60. Ra5 (60. g5 {looks sharper.} Rb2+ 61. Kg3 Rb4 62. Ra7+ Ke8 63. Rg7) 60... Rc3 61. Re5 Ra3 62. Re3 Ra4 63. Kf3 Rb4 64. Ra3 Ke6 65. Ra6+ Kf7 66. Ra7+ Kf8 67. Rd7 Ra4 68. Ke3 Rb4 69. Rd4 Rb6 70. Ke4 Ke7 71. Rd5 Ke6 72. Rd4 Ra6 73. Rb4 Rc6 74. Rb5 Rc4+ 75. Kf3 Rc3+ 76. Kf2 Kf6 77. Re5 (77. g5+ {is more complex.} Kf7 78. Ke2 Rc2+ 79. Ke3 Rc1 80. Rb6) 77... Ra3 78. Re3 Ra4 79. Kg3 Rb4 80. Ra3 Rc4 81. Ra5 Kf7 82. Ra7+ Kf8 83. Rd7 $1 Ra4 84. Rd8+ Kf7 85. Rb8 Rc4 86. Rd8 Ra4 87. Rd5 Ke6 {( -> ...Ra3+)} 88. Re5+ (88. Rb5 {keeps more tension.} Kf6 89. Rb6+ Kg7 90. Rb7+ Kf8 91. Rb1) 88... Kf7 89. Re3 Kf6 90. Rc3 Kf7 91. Rb3 $1 Rc4 92. Rb7+ Kf8 93. Rd7 Ra4 94. Kf3 Rb4 95. Rd5 Ke7 96. Ke3 Ke6 97. Rd4 Rb3+ 98. Ke4 Rb6 99. Ra4 Rb7 100. Rc4 Ra7 101. Rc6+ Kf7 102. Kd5 Rd7+ 103. Kc5 (103. Rd6 {seems wilder.} Ra7 104. g5 Ra5+ 105. Kd4 Rb5 106. Ke3) 103... Kg7 {The position is equal.} 104. g5 Rf7 105. Kd6 {Threatens to win with Rc7.} Rxf4 106. Rc7+ Kg8 107. Rc5 Kf7 108. Rc7+ Kg8 109. Rc8+ Kf7 110. Rc7+ Kg8 {Weighted Error Value: White=0.06/Black=0.07} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "3.7"]
[White "Grischuk, Alexander"]
[Black "Nakamura, Hikaru"]
[Result "1/2-1/2"]
[ECO "C70"]
[WhiteElo "2777"]
[BlackElo "2736"]
[Annotator "TA"]
[PlyCount "104"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,104,33,29,33,25,22,48,36,28,39,41,30,39,42,43,42,34,26,25,26,26,31,46,29,23,29,25,33,30,12,31,24,43,33,41,28,46,38,41,48,35,0,3,0,0,0,0,0,0,0,0,0,0,0,6,6,6,6,6,8,9,9,11,0,0,-8,0,-56,-56,-56,-56,-62,-8,-62,-8,-8,-8,-8,-8,-15,-15,-15,-8,-55,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 (3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O h6 7. Re1 O-O 8. Nbd2 a5 9. Nf1 Be6 10. Bb5 Ne7 11. d4 exd4 12. cxd4 Bb6 13. Ng3 d5 14. e5 Ne4 15. Bd3 Nxg3 16. hxg3 Bg4 17. Be3 a4 18. Rc1 Qd7 19. Kh2 Bh5 20. e6 fxe6 {0-1 (64) Grischuk,A (2777)-Nakamura,H (2736) chess24.com INT 2020}) 3... a6 4. Ba4 g6 5. d4 b5 6. Bb3 {C70: Ruy Lopez: 3...a6 4 Ba4, Norwegian and Delayed Schliemann.} exd4 7. a4 {[#] aiming for axb5.} b4 8. Nxd4 {White is slightly better.} Na5 9. Bd5 c6 10. Ba2 Bg7 11. c3 c5 12. cxb4 cxb4 13. O-O Ne7 {[#]} 14. Nd2 $1 {[#]} O-O $146 (14... Bxd4 15. Nc4) ({Predecessor:} 14... d5 15. exd5 Bxd4 16. Nc4 Nf5 17. Re1+ Kd7 18. Nxa5 Qxa5 19. g4 b3 20. gxf5 bxa2 {½-½ (42) Santos Ruiz,M (2581)-Van Foreest,J (2671) Los Cancajos 2020}) 15. N2f3 d6 16. h3 Bb7 17. Re1 Nec6 18. Bg5 Qd7 19. Qd2 Rab8 20. Bh6 {Strongly threatening Nf5!} Nxd4 21. Nxd4 Bxh6 $1 22. Qxh6 b3 23. Nxb3 Nxb3 24. Bxb3 Bc6 25. Re3 Rb4 26. Rae1 Bxa4 27. Bd5 Bc6 $1 28. b3 Bxd5 29. exd5 Rd4 30. Re7 Qb5 31. R7e4 Rxd5 32. Rh4 {[%csl Gh4][%cal Rh6h7]} Rh5 33. Rxh5 Qxh5 34. Qxh5 gxh5 $11 {[%mdl 4096] Endgame KR-KR} 35. Ra1 Rb8 36. Rd1 Rb6 37. Rd5 h4 38. Rd4 (38. Ra5 $11) 38... Rxb3 $15 39. Rxd6 a5 40. Ra6 Rb1+ 41. Kh2 Ra1 (41... Rb5 $1 $15) 42. g3 $11 hxg3+ 43. Kxg3 a4 44. h4 a3 45. Kf4 Kg7 46. h5 f6 (46... h6 $15) 47. Kf5 {The position is equal.} a2 48. f4 Rh1 49. Ra7+ Kf8 50. Rxa2 Rxh5+ 51. Kxf6 {[%cal Ra2a8]} Rh6+ 52. Ke5 Rb6 {Weighted Error Value: White=0.06/Black=0.05} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "3.8"]
[White "Giri, Anish"]
[Black "Nepomniachtchi, Ian"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2764"]
[BlackElo "2789"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,73,0,0,22,10,4,2,5,0,7,0,31,0,34,35,18,31,39,27,46,58,70,81,67,67,73,75,88,90,112,79,100,92,89,89,137,142,153,149,163,155,295,230,225,225,212,196,209,189,200,213,311,308,329,330,331,327,406,377,523,523,533,517]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. a4 e5 7. Nf3 h6 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 8. g3 $5 {[%mdl 4] Leaves trodden paths.} Be7 9. Bg2 {[#]} Nc6 $146 {The position is equal.} ({Predecessor:} 9... Be6 10. O-O O-O 11. h3 Nbd7 12. Be3 Rc8 13. Nh4 Qc7 14. Qf3 Rfd8 15. Nf5 Bxf5 16. exf5 {½-½ (51) Jap Tjoen San,L (2100)-Gould,P (1740) Haarlem 1997}) 10. O-O O-O 11. Re1 Rb8 12. b3 b5 13. axb5 axb5 14. Nd5 Bg4 15. Bb2 Nxd5 16. exd5 Nd4 17. Bxd4 exd4 18. Qd3 ({Reject} 18. Qxd4 Bxf3 19. Bxf3 Bf6 $17) 18... Bxf3 19. Bxf3 Re8 20. Ra6 ({Inferior is} 20. Qxd4 Bf6 $17) 20... Bf8 21. Rf1 Qf6 22. h4 g6 23. h5 Re5 24. hxg6 fxg6 25. Be4 h5 26. Qxd4 {Hoping for f4.} Qf7 {[#]} (26... Rbe8 $16 27. Bd3 Bg7 28. Bxb5 Rd8) 27. Bxg6 $1 {[%mdl 512]} Qxd5 28. Qxd5+ Rxd5 29. Ra7 {Black must now prevent Bf7+.} Rg5 30. Bh7+ Kh8 31. Bd3 Bg7 (31... Rg7 {was worth a try.}) 32. Kg2 $18 Kg8 33. f4 Rc5 34. Re1 h4 35. g4 Rf8 36. Ree7 Bd4 {Now ...Rcc8 and Black clings on.} 37. Rad7 {Weighted Error Value: White=0.06/Black=0.28} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "4.1"]
[White "Dubov, Daniil"]
[Black "Nepomniachtchi, Ian"]
[Result "1/2-1/2"]
[ECO "B93"]
[WhiteElo "2710"]
[BlackElo "2789"]
[Annotator "TA"]
[PlyCount "162"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,162,8,1,24,32,27,23,25,0,12,0,0,-39,-39,-37,-46,-54,-40,-54,-43,-82,-89,-103,-104,-97,-97,-124,-63,-69,0,0,0,0,25,25,24,24,25,16,30,0,0,0,0,0,17,0,190,187,178,174,169,167,123,95,104,0,0,0,76,81,83,50,402,402,402,402,486,483,450,288,244,137,134,131,134,133,131,127,131,83,143,129,150,117,128,125,135,131,122,118,118,108,138,138,128,128,131,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-9,0,-9,0,0,0,0,0,-13,0,0,8]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nb3 Be7 {B93: Sicilian Najdorf: 6 f4.} 8. fxe5 dxe5 9. Qxd8+ Bxd8 {[#] White has an edge.} 10. Bg5 $146 ({Predecessor:} 10. Be3 Nbd7 11. Be2 Bb6 12. Bxb6 Nxb6 13. O-O-O Bg4 14. Rd6 Nbd7 15. Bxg4 Nxg4 16. Nd5 {½-½ (29) Hulak,K (2525)-Pavlov,M (2380) Moscow (Russia) 1977}) 10... Nbd7 11. a4 h6 12. Bh4 {[#]} (12. Be3 {keeps more tension.} b6 13. Bd3 Bb7 14. O-O-O Be7 15. Rhf1) 12... Nxe4 $1 13. Bxd8 Nxc3 14. Bc7 Nd5 15. Bd6 Ne3 16. Bd3 Nxg2+ 17. Kd2 Nf4 18. Rag1 g6 19. a5 Nxd3 ({Better is} 19... f5 $17 20. Re1 Nxd3 21. cxd3 Kf7 22. Bxe5 Nxe5 23. Rxe5 Bd7) 20. cxd3 $15 b6 (20... Rg8 $15) 21. Rc1 $11 Bb7 22. Rhe1 {Strongly threatening Rc7.} bxa5 23. Rc7 Bg2 24. Nc5 Nxc5 25. Bxc5 f6 26. Rc1 Bh3 27. Re7+ Kd8 28. Rg7 Rc8 29. d4 exd4 $2 (29... Bf5 $11 {and Black has nothing to worry.}) 30. Bb6+ $1 $18 Ke8 31. Re1+ Kf8 32. Ree7 Be6 33. Ra7 g5 34. Bxd4 (34. Rge7 $16 Bf5 35. Rf7+ Kg8 36. Rg7+ Kf8 37. Rgf7+ Kg8 38. Rg7+ Kf8 39. Rgf7+) 34... Rg8 $1 $11 {[%cal Rg8g7]} 35. Rge7 Bb3 (35... Ba2 $11 {remains equal.}) 36. Reb7 $1 $16 Be6 37. Rxa6 Bf7 {[%mdl 8192]} (37... Rd8 $14 38. Ke3 Rd7) 38. Rxf6 $18 {[%mdl 64] Double Attack} Rg7 39. Rxh6 {[%mdl 64] Discovered Attack} Rg6 40. Rh7 Bd5 41. Rbd7 Be6 {[#]} 42. Bg7+ (42. Ra7 $1 $18) 42... Ke8 $16 43. Ra7 {White threatens Rh8+ and mate.} Rd8+ 44. Ke3 {White wants to mate with Rh8+.} Rd7 {[#]} 45. Ra8+ Ke7 46. Rxa5 Bf7 ({Black should try} 46... Kd6) 47. Be5 Re6 48. Rg7 Rb7 49. Kf2 Rc6 50. Bc3 Rh6 51. Kg3 ({Don't take} 51. Rgxg5 Rxh2+ 52. Ke3 Rh3+ 53. Kf2 Rh2+ 54. Kg3 Rhxb2 $14) 51... Rd7 52. Re5+ Kf8 53. Rgxg5 Rd3+ 54. Kf4 {aiming for Bb4+.} Be6 {( -> ...Rh4+)} 55. Re2 (55. Rh5 $16 Rxh5 56. Rxh5) 55... Rh4+ $11 {The position is equal.} 56. Ke5 Rd5+ 57. Kxe6 {Threatening mate with Rf2+.} Rxg5 {[%mdl 4096] Endgame KRR-KRB} 58. Bf6 Rg6 {And now ...Rf4 would win.} 59. Rd2 {[%cal Rd2d8]} Re4+ 60. Kf5 Reg4 61. Ke6 {[%cal Rd2d8]} Re4+ $1 62. Kf5 Reg4 $1 63. h4 (63. b4 {is interesting.} Rg2 64. Rd8+ Kf7 65. Rd7+ Kg8 66. b5) 63... Rg2 64. Rd8+ Kf7 65. Rd7+ Ke8 66. Rd8+ Kf7 67. Rd7+ Ke8 68. Rb7 Rh6 {Hoping for ...Rf2+.} 69. Bg5 Rf2+ 70. Kg4 Re6 71. Kh5 Rf7 72. Rb8+ Kd7 73. Rd8+ Kc6 74. Rd4 Kc5 75. Ra4 Rb7 (75... Rf2 {with more complications.} 76. b3 Rf8 77. Kg4 Re1 78. Rf4 Rg1+) 76. Ra2 Kc4 77. Kg4 Kb3 78. Ra3+ Kxb2 79. Re3 Rb4+ 80. Kh5 Rxe3 81. Bxe3 Kc2 {Black escapes into a draw.  Weighted Error Value: White=0.16/Black=0.32} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "4.2"]
[White "Nakamura, Hikaru"]
[Black "Giri, Anish"]
[Result "1-0"]
[ECO "C67"]
[WhiteElo "2736"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,119,14,25,5,16,14,11,11,11,10,10,16,10,14,14,14,20,12,16,20,22,13,15,14,14,18,25,0,0,0,0,0,0,0,0,0,18,6,6,23,66,66,66,66,66,66,66,66,66,66,106,106,106,106,106,89,106,99,106,70,108,106,106,95,106,106,108,106,107,103,105,102,166,147,139,139,240,240,205,130,122,122,122,0,122,0,272,268,258,268,239,239,232,232,234,214,214,170,178,117,360,378,385,394,29968,29947]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 O-O 9. Nc3 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} Ne8 10. Nd5 Bd6 11. Re1 {The position is equal.} c6 12. Ne3 Be7 13. c4 Nc7 14. d4 d5 15. cxd5 Bb4 16. Bd2 Bxd2 17. Qxd2 $5 {[%mdl 4] Leaves trodden paths.} Nxd5 18. Nxd5 Qxd5 19. Re5 Qd6 20. Bc4 Bd7 21. Rae1 b5 22. Bb3 a5 {[%cal Ba7a5,Ba5a4][%mdl 32]} 23. a3 a4 24. Ba2 Rae8 25. Qc3 (25. h3 {feels hotter.} Rxe5 26. Rxe5 h6 27. g4 Rd8 28. Qc3) 25... Rxe5 26. dxe5 Qe7 27. Rd1 {[#]} Be6 $146 ({Predecessor:} 27... Bf5 28. Rd6 Rd8 29. Qd2 Rxd6 30. exd6 Qf6 31. h3 g6 32. f4 Bd7 33. Bb1 c5 {½-½ (41) Nakamura,H (2736)-So,W (2770) chess24.com INT 2020}) 28. Bxe6 Qxe6 $14 {[%mdl 4096] Endgame KQR-KQR} 29. Rd6 $36 {[%mdl 2048] White has some pressure.} Qf5 30. Rxc6 Rd8 {( -> ...Rd1+)} 31. h3 h6 32. Qe1 Rd5 33. e6 fxe6 34. Rxe6 (34. Qxe6+ Qxe6 35. Rxe6 Rd2 $15) 34... Rd4 35. Re2 Kh7 36. Re7 Rc4 37. Re5 (37. Qe3 {is interesting.} Qd5 38. Qg3 Qd1+ 39. Kh2 Qd4 40. Re6) 37... Qf4 {Threatens to win with ...Rc1.} 38. Qb1+ ({Avoid the trap} 38. Rxb5 $2 Rc1 $19) 38... Kg8 39. Re1 Rc8 40. Qd1 Kh8 41. g3 Qf5 42. Kg2 Rc2 43. Qd4 Kh7 (43... Qf8 $16 {was called for.}) 44. Re7 {[%csl Ge7][%cal Rd4g7]} Qg6 45. h4 {Threatening mate with h5.} Qc6+ (45... Rc4 $16 46. Qd7 Rc5) 46. Kh2 $18 {[%csl Ge7][%cal Rd4g7]} Qg6 47. Re5 {Hoping for h5.} Qf6 48. Qd3+ Qg6 49. Qd4 {And now h5 would win.} ({Don't go for} 49. Qxb5 $2 Rxf2+ 50. Kh3 Rf3 $19) 49... Qf6 $1 {[%cal Rf6f2]} 50. Kg1 (50. Qe4+ $16 Qg6 51. Qxg6+ Kxg6 52. h5+ (52. Rxb5 Rxf2+ 53. Kh3 Kf7 $16) 52... Kf7 53. Rxb5) 50... Rc1+ $2 {[%mdl 8192]} (50... Qf3 $11 {and Black is okay.} 51. Rc5 Re2) 51. Kg2 Qc6+ 52. Qd5 Qxd5+ 53. Rxd5 {KR-KR} b4 54. axb4 Rc4 {[#]} 55. Rb5 Rd4 56. h5 Kg8 57. Rb7 ({White should play} 57. Kh3 $18) 57... Kh7 $2 (57... Kf8 $16 {was necessary.} 58. b5 Rd2) 58. Rb8 Rd5 59. Ra8 Rxh5 $2 {[#]} (59... Rb5 $18 60. Rxa4 Rb7) 60. Ra5 $1 {[%cal Ra5h5] Weighted Error Value: White=0.11/Black=0.34} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "4.3"]
[White "Vidit, Santosh Gujrathi"]
[Black "Grischuk, Alexander"]
[Result "1/2-1/2"]
[ECO "E05"]
[WhiteElo "2726"]
[BlackElo "2777"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,89,1,12,5,12,7,17,8,13,22,26,20,19,11,12,14,16,16,14,7,15,7,20,13,25,14,21,12,10,0,17,8,10,10,30,4,7,7,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 Nf6 2. g3 e6 3. Bg2 d5 4. Nf3 Be7 5. d4 O-O 6. O-O dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Bg5 Nbd7 11. Nc3 h6 12. Bxf6 {E05: Open Catalan: 5 Nf3 Be7.} Nxf6 13. Rfd1 a5 14. e3 Bb4 {[#]} 15. Ne5 $146 ({Predecessor:} 15. Qe2 Qe7 16. Qc2 Rfd8 17. Rac1 Nd7 18. Ne1 Bxg2 19. Kxg2 c6 20. Nd3 Bd6 21. Ne4 {½-½ (37) Giri,A (2776)-Aronian,L (2772) Bucharest 2019}) 15... Bxg2 16. Kxg2 Qe7 17. Nd3 (17. Qe2 {with more complications.} Rfd8 18. Nc4 c5 19. Nb5 cxd4 20. Nxd4 Rac8 21. Nb5) 17... Rfc8 18. Nxb4 (18. b3 {is interesting.} b6 19. Ne5 c5 20. Nb5 cxd4 21. Qxd4 Qb7+ 22. Kg1) 18... Qxb4 19. b3 Qe7 20. e4 Rd8 21. Rac1 Rac8 22. f3 Rd7 23. Ne2 c6 24. Rd2 Qd8 25. Rcd1 Qb6 26. Qc3 Rcd8 27. h4 Qc7 28. Qc5 b6 {The position is equal.} 29. Qc3 c5 30. dxc5 Rxd2 31. Rxd2 Rxd2 32. Qxd2 Qxc5 33. Nf4 (33. Qd8+ {seems wilder.} Kh7 34. Qd3 Kg8 35. Qd2 Qc7 36. Nc3) 33... Qc7 34. Nd3 Nd7 35. h5 Kf8 36. g4 Ke7 37. g5 hxg5 38. Qxg5+ {[%mdl 64] [#] Double Attack} Kf8 39. h6 gxh6 40. Qxh6+ Ke7 {White must now prevent ...Qc2+.} 41. Qg5+ Ke8 42. Qd2 Ke7 43. Qg5+ Ke8 44. Qd2 Ke7 45. Qg5+ {Not much happened in this game.  Weighted Error Value: White=0.04/Black=0.03} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "4.4"]
[White "Radjabov, Teimour"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2765"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "127"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,127,27,41,-8,8,0,0,0,3,10,10,13,17,15,24,6,10,1,7,0,13,0,5,0,2,0,0,0,0,0,0,0,0,0,0,2,6,0,0,0,8,8,8,8,8,0,0,0,8,7,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,0,25,25,25,25,25,25,25,25,25,25,25,25,25,25,25,0,25,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,23,0,23,0,23,0]} 1. Nf3 Nf6 2. c4 e6 3. Nc3 d5 4. d4 c5 5. cxd5 Nxd5 6. Bd2 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} Nc6 7. dxc5 Bxc5 8. e3 {The position is equal.} Nxc3 9. Bxc3 Qxd1+ 10. Rxd1 {[#]} Bb4 $146 ({Predecessor:} 10... O-O 11. Be2 Nb4 12. a3 Nd5 13. Bd4 Bxd4 14. Nxd4 Bd7 15. O-O g6 {0-1 (42) Ruffer,V (1632)-Portych,V (1826) Rychnov 2010}) 11. Bxb4 Nxb4 12. Bb5+ Ke7 13. a3 a6 14. Be2 Nc6 15. Ng5 h6 16. Ne4 Rd8 17. Rc1 Bd7 18. Nc5 Be8 19. f4 a5 20. Rc2 b6 21. Ne4 Rdc8 22. Kf2 Na7 23. Rd2 Rd8 24. Rhd1 Ba4 (24... Rxd2 {seems wilder.} 25. Rxd2 f6 26. Rc2 Rd8 27. Nd2 Rc8) 25. Rxd8 Rxd8 26. Rxd8 Kxd8 $11 {[%mdl 4096] Endgame KBN-KBN} 27. Nd6 f6 28. e4 Bb3 29. Ke3 Nc8 30. Nxc8 Kxc8 {KB-KB} 31. Kd4 Kd7 32. e5 f5 33. h4 Ke7 34. Bf3 Ba4 35. Kc4 Be8 36. b4 axb4 37. Kxb4 Bd7 38. g3 Be8 39. Be2 Bc6 40. Bb5 Bf3 41. Ba4 {[#] aiming for Kb5.} Bh5 42. Bc6 {Threatens to win with Kb5.} Be2 43. Bb5 Bf3 44. Bc4 {Strongly threatening Kb5.} Bc6 $1 45. Be2 Be8 46. Bd1 h5 47. Be2 Kd8 $1 48. Bc4 Bd7 49. Bb3 Kc7 50. Bd1 Be8 51. Be2 Kd8 52. a4 Kc7 53. a5 bxa5+ 54. Kxa5 Kd8 55. Kb6 Ke7 56. Kc5 Bf7 57. Bb5 g6 58. Kb6 Bg8 59. Kc7 Bf7 60. Bc6 Bg8 $1 61. Bd7 Bf7 62. Bc6 Bg8 $1 63. Bd7 Bf7 64. Bc6 {Not much happened in this game. Accuracy: White = 98%, Black = 100%.} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "4.5"]
[White "Ding, Liren"]
[Black "Dominguez Perez, Leinier"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "2791"]
[BlackElo "2758"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,101,6,-6,0,-2,-6,-4,-10,-10,-9,-15,-9,-9,-5,-67,0,-20,-12,-25,-18,-26,-29,-147,-20,-52,-11,-18,-20,-14,-8,-16,-17,-8,80,69,92,94,89,93,81,79,133,59,54,61,154,155,164,153,164,145,139,137,124,0,180,187,218,216,277,273,247,257,312,254,423,414,426,436,399,332,335,332,335,304,681,331,364,329,514,492,958,955,940,935,845,808,1364,1160,29978,29979,29971,29972]} 1. c4 {Morgado,Juan Sebastian} c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. a3 b6 6. b4 {Black must now prevent b5.} Bb7 {A36: Symmetrical English vs ...g6: 4 Bg2 Bg7.} 7. Bb2 d6 8. b5 Na5 {The position is equal.} 9. Bxb7 Nxb7 10. Nf3 {[#]} e6 $146 ({Predecessor:} 10... Nf6 11. O-O O-O 12. Qc2 d5 13. Nxd5 Nxd5 14. Bxg7 Kxg7 15. cxd5 Qxd5 16. a4 f6 17. Rfd1 Nd6 18. d4 Rfc8 19. dxc5 Qxc5 20. Qb3 Qc4 21. Qb2 {½-½ (21) Hellbing,B (2424)-Nebel,U (2469) IECG email 2007 Telechess CBM 127 [Morgado,Juan Sebastian]}) 11. Qc2 Nf6 12. h4 (12. e3 $11) 12... h5 (12... d5 $15) 13. Ne4 d5 14. Neg5 O-O 15. Ne5 Nd6 16. g4 (16. a4 $11) 16... d4 (16... Nxg4 17. Nxg6 Bxb2 18. Ne7+ Kg7 19. Nc6 $14) ({Much less strong is} 16... hxg4 17. h5 $15) (16... Nxc4 $1 $17 17. Nxc4 (17. Nexf7 $2 Rxf7 18. Qxg6 Rd7 $19) 17... dxc4 18. gxh5 Qd5) 17. gxh5 $11 Nxh5 18. Nxg6 fxg6 ({But not} 18... d3 $2 19. Qxd3 Nf5 20. Bxg7 $18 (20. Nxf8 Qxd3 21. exd3 Bxb2 $11)) 19. Qxg6 {[%csl Gg5][%cal Rg6h7][%mdl 64] Double Attack} Nf6 20. Nxe6 {[%csl Ge6][%cal Rg6g7]} Qe7 21. Nxf8 $40 {[%mdl 128] Black needs to defend precisely.} Rxf8 (21... Re8 $11 {remains equal.} 22. O-O-O Nxc4) 22. d3 $16 Re8 {[%csl Ge8][%cal Re7e2]} 23. O-O-O Qf7 24. Qxf7+ Kxf7 25. Rde1 Nf5 (25... Ng4 $142) 26. Kd1 (26. Rh3 $16) 26... Ng4 $14 27. Ref1 Bh6 ({Black should try} 27... Bf6 $1 $14) 28. h5 $16 Bf4 29. Rh3 {Strongly threatening Rf3.} Bh6 30. Rf3 Ke6 {White should prevent ...Nh2.} 31. Rh1 Rg8 {[#]} 32. Bc1 (32. Ke1 $1 $16) 32... Bxc1 $2 {White leaves nothing to chance now.} (32... Ne5 $11 {and Black is okay.}) 33. Kxc1 $18 Ngh6 34. Kd2 Rg4 35. a4 {[%cal Ba3a4,Ba4a5,Ba5a6][%mdl 32]} Nf7 {[#] intending ...Ng5.} 36. Rfh3 $1 N7h6 37. R3h2 Kd6 $2 (37... Rg7 38. a5 Ke5 39. axb6 axb6) 38. a5 Kc7 39. Ra1 Kb7 40. a6+ Kc7 41. Rf1 Kd6 42. Rhh1 Rg2 $2 (42... Rf4 43. Rhg1 Ne7) 43. Ke1 (43. Rhg1 $142 Rh2 44. Rg6+ Kc7 45. Rc6+ Kb8 46. Rg1) 43... Rg7 44. Rfg1 {And now Rxg7 would win.} Re7 (44... Rh7 {was worth a try.} 45. Rg6+ Kd7) 45. Rg6+ Re6 (45... Kd7 $142 46. Kd2 Rh7) 46. Rhg1 Ne7 47. Rxe6+ Kxe6 48. e3 Nhf5 49. e4 Nh4 50. Ke2 Kf6 51. Rg4 {Weighted Error Value: White=0.29/Black=0.63} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "4.6"]
[White "Carlsen, Magnus"]
[Black "Shankland, Sam"]
[Result "1-0"]
[ECO "A11"]
[WhiteElo "2862"]
[BlackElo "2691"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,65,8,15,-19,-6,-31,0,-33,0,5,33,31,26,17,13,8,43,43,82,80,79,72,85,60,68,65,68,60,68,60,89,68,232,235,226,222,299,235,225,219,235,222,355,344,513,511,528,521,506,508,798,799,1012,988,1076,1056,1695,1502]} 1. c4 c6 2. Qa4 Nf6 3. Nf3 g6 4. d4 Bg7 5. Nc3 O-O 6. Bf4 {A11: English Opening: 1...c6.} d6 {[#]} 7. h3 $146 ({Predecessor:} 7. e3 Nbd7 8. Be2 Re8 9. O-O-O Qb6 10. h3 e5 11. c5 dxc5 12. dxe5 Nh5 13. g4 Nxf4 14. exf4 {1-0 (44) Gorbatov,A (2377)-Kolesar,M (2211) Marianske Lazne 2010}) 7... Nbd7 8. Rd1 {The position is equal.} c5 {Strongly threatening ...cxd4.} 9. e3 cxd4 10. exd4 e5 11. dxe5 dxe5 12. Be3 (12. Nxe5 $2 Qe8 $19) 12... e4 13. Nd4 Qe7 14. Be2 Nc5 15. Qc2 Bd7 16. O-O Rac8 17. Ndb5 Bxb5 18. Nxb5 a6 19. Nd6 Rc6 {[#]} 20. b4 $1 Ncd7 {This move loses the game for Black.} (20... Nd3 $1 $14 21. Nxe4 Nxe4 22. Rxd3 (22. Bxd3 Nc3 $14) 22... Qxb4) 21. c5 $18 ({Don't do} 21. Nxb7 $6 Qxb4 22. Rb1 Qe7 $16) 21... b6 {If only Black now had time for ...bxc5....} 22. Qa4 Nb8 23. Rd2 Nfd7 {[%cal Rb6c5] [#]} 24. Nxe4 {[%mdl 512]} Re6 {[#]} 25. Bg5 $1 f6 {[#]} (25... Nf6 $142) 26. Bc4 $1 {Black must now prevent Rd6.} Kh8 (26... b5 {was worth a try.}) 27. Bxe6 {White is clearly winning.} Qxe6 28. Be3 Qxe4 29. Rxd7 b5 (29... Qe8 $142 30. c6 (30. cxb6 Nxd7 31. Qxa6 f5 $16) 30... b5) 30. Qd1 ({Not} 30. Rd4 $2 {[#]} Qxd4 $3 {[%mdl 512]} 31. Qc2 Qe5 $19) 30... Nxd7 31. Qxd7 f5 32. c6 Be5 33. c7 {Weighted Error Value: White=0.10/Black=0.46} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "4.7"]
[White "Vachier-Lagrave, Maxime"]
[Black "Bluebaum, Matthias"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2784"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "134"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,134,10,18,11,25,22,29,26,32,-29,-18,-46,-37,-41,-39,-58,-54,-45,-38,-58,-56,-58,-45,-69,-77,-69,-79,-101,-36,-37,-31,-54,-56,-49,-36,-48,-26,-43,-39,-54,-58,-69,0,0,5,0,0,0,0,0,0,0,0,0,0,0,150,14,13,-14,0,0,16,16,16,14,14,15,41,36,43,38,35,45,124,114,95,0,32,0,30,0,0,0,0,0,0,0,5,0,6,0,0,0,0,0,12,12,15,15,18,15,41,0,6,0,13,13,30,0,6,6,6,6,6,0,13,13,13,0,18]} 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 exd5 5. Bg5 c6 6. e3 h6 7. Bh4 Be7 8. Bd3 O-O 9. Nge2 $1 {[%mdl 4] now scores much better than the old 9.Qc2. D35: Queen's Gambit Declined: Exchange Variation.} Re8 10. O-O a5 {[#]} 11. Rc1 $146 {White has an edge.} ({Predecessor:} 11. Qd2 b6 12. Rac1 Ba6 13. Na4 Bxd3 14. Qxd3 Ne4 15. Bxe7 Rxe7 16. Ng3 Nxg3 17. hxg3 Re6 18. Rc2 Nd7 19. Rfc1 Qf6 20. Nc3 h5 {½-½ (20) Ramirez Alvarez,A (2516)-Murillo Tsijli,A (2352) San Jose 2004}) 11... Nh5 12. Bg3 ({Better is} 12. Bxe7 $14 Qxe7 13. Re1) 12... Nxg3 $11 13. hxg3 Nd7 14. Qc2 Nf6 15. Nf4 Bd6 16. Rfe1 Bd7 17. e4 dxe4 18. Nxe4 Nxe4 19. Bxe4 Qf6 20. d5 {[%cal Rd5c6]} c5 $1 21. a4 b5 (21... b6 $17) 22. axb5 $15 Bxb5 23. Bd3 Bd7 24. Ne2 h5 25. Nc3 h4 26. Ne4 {[#]} Rxe4 {[%mdl 64] Remove Defender} 27. Rxe4 (27. Bxe4 $2 hxg3 28. fxg3 Bxg3 $19) 27... hxg3 28. fxg3 Bxg3 (28... Qg5 $15 29. g4 Rb8) 29. Qxc5 $11 g6 ({Stronger than} 29... Rc8 30. Qxc8+ Qd8 31. Qxd8+ Kh7 32. Rh4#) 30. Qe3 Bd6 31. Rc2 a4 32. g3 a3 33. bxa3 Rxa3 34. Rf2 Qd8 35. Rh4 Qf8 (35... Be7 $11 36. Rh1 Bf5 37. Rxf5 (37. Qh6 Ra1+ 38. Bf1 Bf6 $11) 37... gxf5) 36. Kg2 ({Reject} 36. Qd4 Qg7 $11) (36. Rfh2 $1 $16 Ra1+ 37. Bf1) 36... Qg7 37. Re4 Qf8 {next ...Bc5 is good for Black.} 38. Rh4 Qg7 {[#]} 39. Qg5 $1 Qe5 40. Qxe5 Bxe5 41. Rd2 Bd6 42. Rc4 Kg7 43. Rcc2 Be5 44. Ra2 Rb3 {[#]} (44... Rc3 $1 $14) 45. Ra7 $1 $16 {[%cal Ra7d7]} Bc8 {[#]} 46. Ra8 (46. d6 $1 $16 {[%cal Rd6d7]} Rb7 47. Rxb7 Bxb7+ 48. Kh2 Bxd6 49. Bc4) 46... Bg4 47. Re8 Bc7 (47... Bd6 {is interesting.} 48. Re4 Bb4 49. Rc2 Bf5 50. Rxb4 Rxb4 51. Bxf5 gxf5 52. Rd2 Rb7) 48. Re4 Ba5 49. Ra2 Rxd3 50. Rxg4 Rxd5 $11 {[%mdl 4096] Endgame KRR-KRB} 51. Rc4 Bb6 52. Rc6 Rb5 53. Ra3 Bd4 54. Rd3 Rb4 55. Rc7 Ra4 56. Rd7 Bf6 57. Rb3 Ra2+ 58. Kf3 {aiming for Rbb7.} Ra5 59. g4 Ra8 60. Rbb7 Rf8 61. Kf4 {And now g5 would win.} Kg8 62. g5 Bc3 {The position is equal.} 63. Ke4 {Threatens to win with Kf4.} Ba1 64. Kd5 {Black must now prevent Ke4.} Bc3 65. Ke4 {Strongly threatening Ke3.} Ba1 66. Kd3 {Hoping for Ke3.} Be5 67. Ke4 Ba1 {Weighted Error Value: White=0.13/Black=0.13} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "4.8"]
[White "So, Wesley"]
[Black "Aronian, Levon"]
[Result "1/2-1/2"]
[ECO "E39"]
[WhiteElo "2770"]
[BlackElo "2781"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,105,28,25,26,27,47,0,16,16,7,-28,0,0,31,0,0,0,0,0,60,60,77,50,48,46,81,81,75,74,73,56,68,47,69,0,7,-107,-109,-105,-104,-100,-77,-82,-100,-96,-38,-206,-195,-178,-208,-172,-191,-222,-154,-160,-159,-137,-105,-107,-107,-97,-106,-114,-20,-20,0,-40,-40,-56,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 c5 5. dxc5 O-O 6. a3 Bxc5 7. Nf3 Nc6 8. Bg5 h6 {E39: Nimzo-Indian: Classical: 4...c5 5 dxc5 0-0.} 9. Bh4 Be7 10. O-O-O $5 {[%mdl 4] Leaves trodden paths.} b6 11. e4 Bb7 12. e5 Ne8 (12... Nh5 $5 {[%cal Re7h4]} 13. Bg3 Na5 $11) 13. Bg3 Rc8 14. Qd3 {[#]} f5 $146 ({Predecessor:} 14... Nb8 15. Kb1 a6 16. Nd4 Nc6 17. Nc2 Nb8 18. f3 f6 19. Qg6 fxe5 20. Bd3 Nf6 21. Bxe5 {1-0 (53) Schrancz,I (2424)-Goins,D (2363) IECG email 2002}) 15. Qxd7 Qxd7 16. Rxd7 Ba8 (16... Rc7 $11 17. Rxc7 Nxc7) 17. h4 $36 {[%mdl 2048] White has some pressure.} Rf7 18. Bf4 Na5 19. Nd2 Bg5 20. hxg5 Rxd7 21. gxh6 Nc7 22. hxg7 Rxg7 23. b4 Nc6 24. Nf3 (24. f3 $14) 24... b5 $11 25. cxb5 {[#]} (25. Bg5 $11) 25... Nxb4 $1 $17 {[%mdl 512] Threatens to win with ...Ncd5.} 26. Kb2 Nbd5 27. Nxd5 Nxd5 28. Bd2 Nb6 29. Rh4 {[#]} Bd5 (29... Be4 $1 $17 {Hoping for ...Rc2+.} 30. Nd4 Bxg2 31. Bxg2 Rxg2) 30. Ng5 $2 (30. Rd4 $1 $15) 30... Bc4 $19 31. Bxc4 Nxc4+ 32. Rxc4 Rxc4 33. Nxe6 Rb7 34. Kb3 Re4 35. a4 {[%cal Ba3a4,Ba4a5][%mdl 32] aiming for Nc5.} Rxe5 36. Nd8 Rd7 37. Nc6 Re4 ({Much weaker is} 37... Rxd2 $6 38. Nxe5 Rxf2 39. Nc6 $11) 38. Bc3 Kf8 ({Black should try} 38... Re6 $17 39. Bb4 Rc7) 39. a5 $11 Rb7 40. b6 axb6 41. a6 Rc7 {[#]} (41... Rd7 $15 42. Bb4+ Kf7) 42. a7 $1 {The position is equal.} Re8 {[#]} 43. Be5 $1 Rxa7 44. Bd6+ Kf7 45. Nxa7 {Threatening Bc7.} Re2 46. Bg3 (46. f4 {seems wilder.} Rxg2 47. Kc4 Ke6 48. Nb5 Rc2+ 49. Kb3) 46... f4 47. Bxf4 {Strongly threatening Be3.} Rxf2 48. g3 Rxf4 49. gxf4 Ke6 50. f5+ Kxf5 51. Nc8 b5 52. Nd6+ Ke5 53. Nxb5 {And White is the lucky defender.  Weighted Error Value: White=0.18/Black=0.16} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "5.1"]
[White "Aronian, Levon"]
[Black "Dubov, Daniil"]
[Result "0-1"]
[ECO "B50"]
[WhiteElo "2781"]
[BlackElo "2710"]
[Annotator "TA"]
[PlyCount "72"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,72,0,20,13,27,10,16,11,14,0,9,0,19,11,11,13,26,0,18,13,17,12,23,0,10,21,16,0,2,9,4,9,25,21,25,24,53,-37,-38,-72,-68,-59,-65,-87,-12,-14,-12,-76,-71,-77,-83,-233,-227,-276,-273,-347,-344,-369,-364,-335,-329,-512,-497,-2416,-2140]} 1. e4 {RR} c5 2. Nf3 d6 3. c3 Nf6 4. Be2 Bd7 5. d3 g6 6. O-O {B50: Sicilian: 2...d6, Miscellaneous.} Bg7 7. Be3 O-O 8. Nbd2 {The position is equal.} Nc6 9. h3 e5 10. a3 Rc8 11. b4 {[%cal Bb2b4,Bb4b5][%mdl 32] [#]} b6 $146 ({Predecessor:} 11... Qe7 12. Re1 b6 13. Bf1 d5 14. exd5 Nxd5 15. Bg5 f6 16. Bh4 Be6 17. c4 Nf4 {0-1 (65) Hnydiuk,A (2448)-Kempinski,R (2615) Katowice 2010 EXT 2016 [RR]}) 12. Re1 h6 13. Rc1 Re8 14. b5 Ne7 15. a4 Be6 16. d4 (16. Bf1 {is interesting.} Nd7 17. d4 exd4 18. cxd4 d5 19. a5) 16... cxd4 17. cxd4 d5 18. dxe5 Nxe4 19. Nxe4 dxe4 20. Nd4 Bd5 21. Bf4 Bb7 22. Bc4 Nd5 {[#]} 23. e6 {[#]} Rxc4 $1 $15 24. exf7+ (24. Nc6 Rxc6) 24... Kxf7 25. Nc6 {[%cal Rc6d8]} Bxc6 26. Rxc4 Bb7 (26... Nxf4 $17 27. Qxd8 Rxd8 28. Rxc6 Rd4 29. Rc7+ Kf6 30. Rxa7 Nd3) 27. Qb3 $11 Kg8 {Strongly threatening ...Kh7.} 28. Rd1 Re7 $17 {aiming for ...Kh7.} 29. Rc6 Rd7 ({Don't go for} 29... Bxc6 $2 30. bxc6 Kh7 31. Qxd5 $18) 30. Rxd5 {This costs White the game.} Rxd5 $19 31. Rd6 Qa8 32. Rxg6 Kh7 33. Rxg7+ Kxg7 34. Qc3+ Kg6 35. Be5 (35. Bxh6 {might work better.} Qg8 36. Qg3+ Kh7 37. Qh4) 35... Qf8 {Hoping for ...Rd1+.} 36. Bd4 (36. Qg3+ $142 Kh7 37. Kh2) 36... Qd6 {Weighted Error Value: White=0.47/Black=0.10} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "5.2"]
[White "Bluebaum, Matthias"]
[Black "So, Wesley"]
[Result "0-1"]
[ECO "D04"]
[WhiteElo "2670"]
[BlackElo "2770"]
[Annotator "TA"]
[PlyCount "132"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,132,0,0,-22,-22,-17,-11,-26,-17,-29,-38,-36,-25,-37,0,-17,-25,-31,-21,-71,-62,-48,-45,-60,-37,-61,-43,-42,-37,-37,-14,-45,-20,-19,0,0,0,0,0,-6,-2,-8,-13,-42,-55,-55,-13,-51,-47,-96,-84,-100,-1,-2,0,0,0,0,0,0,6,0,0,-21,0,0,0,-62,-69,-118,-50,-122,-83,-91,-84,-84,-85,-115,-38,-41,0,0,0,-17,0,-18,-24,-78,-78,-70,-73,-88,-78,-164,-177,-202,0,0,0,0,8,-976,-1145,-1096,-741,-2282,-1933,-29974,-29975,-29977,-29978,-29978,-29975,-29977,-29977,-29976,-29977,-29973,-29975,-29970,-29970,-29983,-29984,-29984,-29986]} 1. d4 Nf6 2. Nf3 d5 3. e3 c5 4. dxc5 e6 5. b4 a5 6. c3 {D04: Colle System.} axb4 7. cxb4 b6 $1 8. Bb5+ {The position is equal.} Bd7 9. Bxd7+ Nbxd7 10. a4 bxc5 11. b5 {[#]} Ra7 $1 $146 {[%mdl 8] A top novelty.} ({Predecessor:} 11... Bd6 12. Bb2 O-O 13. O-O Qc7 14. Nbd2 c4 15. Bc3 e5 16. a5 e4 17. b6 Qb8 {1-0 (35) Firouzja,A (2749)-So,W (2770) chess24.com INT 2020}) 12. O-O Qa8 13. Bd2 Bd6 14. Nc3 Bc7 15. Qc2 O-O 16. Rfb1 Rc8 17. Ne2 Ne4 18. Be1 Ba5 (18... Bd8 {keeps more tension.} 19. Ng3 Nd6 20. Bc3 Ba5 21. Ne2 Ne4) 19. Bxa5 Rxa5 20. Ng3 {White wants to play Nxe4.} Nef6 21. Ra2 g6 22. Rba1 Rc7 23. Nd4 e5 24. Nb3 Raa7 25. a5 {And now b6 would win.} c4 26. Nd2 (26. Nc1 $5 {[%cal Rb5b6]} Rc5 27. Qb2 $11) 26... Rc5 $1 {[%cal Rc5b5]} 27. Qb1 Ne8 $1 28. Qb4 Nd6 $1 29. b6 {[#]} Ra6 30. Ne2 Qc6 (30... Nb7 $17 {[%cal Rc5a5]} 31. Nc3 Rcxa5 32. Rxa5 Rxa5) 31. Nc3 $11 Nb7 32. h3 Nf6 {aiming for ...d4.} 33. Nf3 Nd7 34. Nd2 Kg7 35. Ra3 h5 36. h4 Nf6 {With the idea ...d4.} 37. Nf3 Ng4 38. Ne2 (38. R1a2 $11) 38... Qf6 $15 {White must now prevent ...e4.} 39. Qc3 e4 ({Black should play} 39... Rb5 $17 40. Qd2 e4) 40. Nd2 ({White should try} 40. Ng5 $15) 40... Rcxa5 41. Rxa5 Rxa5 42. Rxa5 Nxa5 43. Nb1 {[#]} Kf8 $1 44. Nf4 $1 Qxh4 45. Nh3 Nc6 {Strongly threatening ...Qd8.} 46. Qh8+ Ke7 {Threatens to win with ...d4!} 47. Nc3 {Hoping for Qc8.} d4 48. exd4 (48. Nd5+ $1 $11 Kd7 49. b7) 48... e3 $17 {[%cal Re3f2]} 49. Nd5+ Kd7 {[%cal Re3f2]} 50. Nxe3 Nxe3 51. b7 {[#]} (51. fxe3 $17 {is a better defense.} Qe1+ 52. Kh2 Qxe3 53. Qa8 Qxd4 54. Qb7+ Kd6 55. Qxf7 (55. Qc7+ $2 Kc5 $19)) 51... Qd8 $1 $19 52. Qg7 Nd5 $2 ({Better is} 52... Ng4 $19 53. Qxf7+ Qe7 54. Qxc4 Kc7) 53. Qxf7+ $11 Nce7 (53... Kd6 $5 54. Nf4 $8 Nxf4 55. Qxf4+ Ke7 $11) 54. Nf4 Kc6 {...Nxf4 is the strong threat.} 55. Nxg6 {[%mdl 8192] This move loses the game for White.} (55. Ne6 $11 Qd6 56. Nc5) 55... Nxg6 $19 56. Qxg6+ Kxb7 57. Qxh5 c3 58. Qe2 Qb6 {Black mates.} 59. Qc4 Qc6 60. Qb3+ Ka7 61. Qa2+ Kb6 62. Qb1+ Ka5 63. Qa2+ Kb5 64. Qe2+ Kb4 65. Qc2 Nf4 {[%csl Gf4][%cal Rc6g2]} 66. f3 Qg6 {Weighted Error Value: White=0.42/Black=0.14} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "5.3"]
[White "Shankland, Sam"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1/2-1/2"]
[ECO "D97"]
[WhiteElo "2691"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,81,27,15,36,34,36,35,34,32,34,31,47,53,54,56,85,6,37,27,34,36,34,17,26,33,32,25,33,45,43,0,0,0,0,-36,-23,-25,0,0,20,15,20,16,70,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Nc6 8. Be2 e5 {[%cal Re5d4] 8...Bg4 is not played anymore. D97: Grünfeld: Russian System: 7 e4, replies other than 7...Bg4.} 9. d5 ({Stronger than} 9. Nxe5 Nxd4 10. O-O Nxe4 $1 $17 {[%mdl 512]}) 9... Nd4 10. Nxd4 exd4 {White is slightly better.} 11. Qxd4 c6 12. Qc4 b5 13. Qxc6 Bd7 14. Qd6 Re8 {[#]} 15. e5 (15. f3 $1 $16) 15... Ng4 {[#]} (15... b4 $5 16. Qxb4 (16. exf6 $2 bxc3 17. O-O Rxe2 $19) 16... Rxe5 $14) 16. Bf4 $146 ({Predecessor:} 16. e6 fxe6 17. h3 Ne5 18. dxe6 Bxe6 19. Qxd8 Raxd8 20. Bxb5 Bc4 21. Bxe8 Nd3+ 22. Kf1 Bxc3 23. bxc3 Nxc1+ {½-½ (36) Yu,Y (2763)-Vachier Lagrave,M (2774) Khanty-Mansiysk 2019}) 16... Nxe5 17. O-O a6 {Hoping for ...Bf8.} 18. Qa3 Qb6 19. Be3 Qb7 20. Qb3 Rac8 21. a4 {[%cal Ra4b5]} Bg4 {White must now prevent ...Rxc3!} 22. Rfe1 {[%cal Ra4b5]} Bxe2 23. Rxe2 {[%cal Ra4b5]} Nc4 24. Rd1 {[%cal Ra4b5] [#]} Nxb2 $1 25. Qxb2 {Threatens to win with Bd4.} Rxc3 26. Qb1 Qd7 27. axb5 axb5 28. d6 Bf8 ({Black should try} 28... Ra3 $11) 29. Ra2 ({White should play} 29. h3 $14) 29... Bxd6 $11 {The position is equal.} 30. Rad2 Re6 31. Bf4 {[%cal Rd2d6]} Rc6 32. Qxb5 {h3 is the strong threat.} Rc1 $1 {[%cal Rc1d1]} 33. Qf1 Rxd1 34. Rxd1 {And now Qd3 would win.} Qe7 35. Bxd6 Rxd6 36. Rxd6 Qxd6 {KQ-KQ} 37. g3 h5 38. h4 $1 Qe6 39. Qd3 Qe1+ 40. Kg2 Qe6 41. Qd8+ {Weighted Error Value: White=0.12/Black=0.09} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "5.4"]
[White "Dominguez Perez, Leinier"]
[Black "Carlsen, Magnus"]
[Result "0-1"]
[ECO "B75"]
[WhiteElo "2758"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "144"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,144,58,44,58,45,75,73,83,37,49,35,67,62,58,35,27,17,41,23,35,0,0,0,0,-13,29,-22,-7,-29,22,-35,-54,-28,32,46,54,-157,0,0,0,0,337,-54,-54,-468,-70,-25,0,-271,0,0,-1,0,0,-86,-86,-81,-59,-59,-70,-79,-47,-33,-41,-62,-52,-161,-164,-164,-164,-169,-142,-179,-215,-218,-214,-206,-206,-208,-208,-201,-110,-110,-110,-139,-110,-110,-110,-110,-110,-132,-110,-110,-110,-110,-110,-110,-102,-102,-102,-110,-102,-102,-102,-110,-110,-110,-80,-95,-95,-110,-110,-29975,-29976,-29977,-29977,-29981,-29982,-29982,-29983,-29983,-29984,-29984,-29985,-29985,-29986,-29986,-29987,-29987,-29988,-29988,-29987]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 g6 6. Be3 Bg7 7. f3 a6 8. Qd2 h5 {B75: Sicilian Dragon: Yugoslav Attack, Miscellaneous.} 9. Bc4 Nbd7 {9...Nbd7 is better than 9...b5.} 10. O-O-O b5 {White is better.} 11. Bb3 {aiming for Nc6.} (11. Nc6 Qc7 $17) 11... Nc5 $5 {[%mdl 4] An interesting side line.} 12. Kb1 Bb7 13. Rhe1 Rc8 14. Bg5 {[#]} O-O $146 ({Predecessor:} 14... Nxb3 15. axb3 Qc7 16. Re2 Qc5 17. f4 Nd7 18. e5 e6 19. exd6 O-O 20. Be7 Rfe8 {0-1 (55) Gao,H (1859)-Steadman,M (2242) Auckland 2011}) 15. Nd5 e6 16. Nxf6+ Bxf6 17. h4 Bxg5 18. hxg5 Kg7 19. Qe3 Qc7 20. Rd2 (20. c3 $142) 20... b4 21. Red1 Rfd8 (21... e5 $142) 22. Qf4 (22. g4 $11) 22... Qe7 $1 $15 23. Ne2 {[%cal Rd2d6]} a5 (23... e5 $11 24. Qe3 a5) 24. e5 $1 $14 {[%cal Re5d6]} ({Much weaker is} 24. Rxd6 Rxd6 25. Rxd6 a4 $15) 24... d5 {[#]} 25. g4 $2 (25. Bc4 $1 $14 {stays ahead.}) 25... hxg4 $2 ({Better is} 25... Rh8 $1 $17 26. c3 hxg4 27. cxb4 Nxb3 28. axb3 gxf3 29. Qxf3 axb4 30. Qf6+ Qxf6 31. gxf6+ Kg8) 26. Qf6+ $11 Qxf6 27. gxf6+ Kh6 $2 {[%mdl 8192]} (27... Kf8 $1 $11 {and Black stays safe.}) 28. Rh1+ $2 (28. Rd4 $1 $18 {Threatening mate with Rh1+.} Ne4 29. fxe4) 28... Kg5 $15 29. f4+ Kf5 30. Rf1 {[%cal Re2g3]} g5 {Hoping for ...gxf4.} 31. Nd4+ $2 {[%mdl 8192]} (31. Ng3+ $11 {and White is okay.} Kg6 32. f5+ exf5 33. Nxf5) 31... Kg6 $2 (31... Ke4 $19 {And now ...Ba6 would win.} 32. Re2+ Kxd4 33. Rd1+ Nd3 $1 {[%mdl 512]} 34. Rxd3+ Kc5) 32. f5+ $1 $11 exf5 33. Nxf5 {White wants to mate with Ne7+!} g3 $1 34. Rg2 (34. Ne7+ $11 {keeps the balance.} Kh5 35. Nxc8 Nxb3 36. axb3 (36. cxb3 Bxc8 37. Kc1 Be6 $11) 36... Bxc8 37. Kc1) 34... Ne4 $1 $17 35. Nxg3 Re8 $36 {[%mdl 2048] Black fights for an advantage.} 36. Nxe4 dxe4 37. e6 $1 fxe6 (37... e3 $5 {[%cal Rb7g2]} 38. exf7 Red8 $17) 38. f7 Rf8 39. Bxe6 Rc5 40. Rg3 (40. Rd2 $15) 40... Re5 $1 $19 {[%cal Re5e6]} 41. Bg4 e3 42. Kc1 Rxf7 43. Rxf7 Kxf7 {[%mdl 4096] Endgame KRB-KRB} 44. Kd1 Kf6 45. Ke1 Bd5 46. a3 bxa3 47. bxa3 Be4 ({Black should try} 47... Be6 $19 {Threatens to win with ...Bxg4.} 48. Rf3+ Ke7) 48. Rxe3 $17 Bxc2 49. Kd2 {Rxe5 is the strong threat.} Rxe3 50. Kxe3 {KB-KB} Ke5 51. Bf3 Bf5 52. Bc6 Kd6 53. Bf3 Kc5 {Strongly threatening ...Kc4.} 54. Be2 Bg6 55. Bf1 Bh5 56. Ke4 Bd1 57. Ke3 g4 58. Ba6 Bf3 59. Bf1 Bc6 60. Kf4 Kd4 (60... Bb5 {looks sharper.} 61. Bg2 Be2 62. Ke3 Bd1 63. Bf1 Bf3) 61. Kxg4 {[#]} Kc3 $1 62. Kf5 Kb2 63. Ke5 $2 {[%mdl 8192]} (63. Be2 $17) 63... Kxa3 {Black mates.} 64. Kd6 Be8 65. Kc5 {[#]} a4 $1 {[%cal Ba5a4,Ba4a3][%mdl 32]} 66. Bc4 Kb2 67. Kb4 a3 68. Bd5 Bg6 69. Be6 Bb1 70. Bd5 Ba2 71. Be4 Bf7 72. Bb1 Bb3 {Weighted Error Value: White=0.37/Black=0.33} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "5.5"]
[White "Duda, Jan-Krzysztof"]
[Black "Ding, Liren"]
[Result "1-0"]
[ECO "D38"]
[WhiteElo "2743"]
[BlackElo "2791"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,96,18,10,23,15,20,14,10,11,28,22,28,0,0,-106,19,23,33,28,20,28,43,40,44,0,23,21,23,12,39,0,16,0,20,0,0,-12,0,0,0,0,15,-28,-31,-20,-27,-22,-23,-28,76,77,82,73,65,54,199,192,196,6,32,0,0,0,0,0,0,0,0,0,8,8,8,5,12,13,38,38,94,94,6195,6195,6193,6193,6193,6187,29997]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 O-O {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 8. e3 Bf5 9. Be2 $1 {[%mdl 4] is now more promising than 9.Qb3.} Nbd7 {The position is equal.} 10. Qb3 Qe7 11. a3 Bxc3+ 12. Qxc3 (12. bxc3 {is interesting.} b6 13. c4 dxc4 14. Bxc4 Be6 15. Bxe6 Qxe6 16. Qxe6 fxe6 17. Bxf6 gxf6 18. Ke2) 12... Qe6 {[#]} 13. Nd2 $146 (13. O-O $11) ({Predecessor:} 13. Bxf6 Nxf6 14. O-O c6 15. Nd2 Ne4 16. Nxe4 Bxe4 17. b4 Rfe8 18. a4 Qg6 19. f3 {0-1 (68) Yilmaz,M (2595)-Melkumyan,H (2650) Douglas 2019}) 13... Rfc8 ({Better is} 13... Ne4 $1 $17 {[%cal Re4c3]} 14. Qc1 Nxd2 15. Kxd2 Rac8) 14. O-O $11 c5 15. Rfc1 c4 16. a4 Ne4 17. Nxe4 Bxe4 18. Qd2 Rc6 (18... b6 {with more complications.} 19. Rc3 a6 20. f3 Bg6 21. e4 b5) 19. f3 Bg6 20. e4 Rac8 ({Don't play} 20... dxe4 21. d5 $16) 21. e5 Nf8 22. Ra3 Qd7 23. Rf1 Rb6 24. f4 Be4 25. Bd1 Rg6 26. Rf2 Bd3 27. Rxd3 cxd3 28. f5 Rgc6 29. Qxd3 Rc1 {Threatens to win with ...Qxa4.} 30. Rf1 R8c4 (30... Ra1 $11) 31. Be1 $16 Rxa4 32. Bxa4 Qxa4 33. e6 Qe8 (33... fxe6 $14 34. Qe3 Rc6) 34. Qe3 $18 Rc6 35. Bb4 (35. e7 $18) 35... Nh7 {[%cal Rf7e6]} 36. exf7+ (36. e7 {feels hotter.} Nf6 37. Rc1 Rxc1+ 38. Qxc1 Qa4 39. Qe1) 36... Qxf7 37. Be7 Nf6 38. Bxf6 Qxf6 $11 {[%mdl 4096] Endgame KQR-KQR} 39. Qe5 Kh7 40. h3 Rc2 41. b3 Rd2 42. Rf4 b5 43. Qxd5 a6 44. Kh2 Rb2 (44... a5 $14) 45. Re4 $16 {Re8 is the strong threat.} Rf2 $2 {[%mdl 8192] [#]} (45... Qg5 $16 46. Rg4 Qe7) 46. Re8 $1 $18 {[%csl Ge8][%cal Rd5g8] White is clearly winning.} Qxf5 {[#]} 47. Qg8+ $1 Kg6 48. Re6+ {[%mdl 64] Double Attack} Kg5 {Weighted Error Value: White=0.17/Black=0.24} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "5.6"]
[White "Grischuk, Alexander"]
[Black "Radjabov, Teimour"]
[Result "1/2-1/2"]
[ECO "B31"]
[WhiteElo "2777"]
[BlackElo "2765"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,98,0,0,0,0,0,13,0,0,0,0,0,0,0,0,0,22,0,0,0,0,0,0,0,0,0,10,8,8,0,0,0,9,0,10,-6,0,-15,-13,-14,-13,-18,-11,-19,-5,-4,-4,-4,-7,-12,-15,-21,4,6,4,0,4,4,8,8,27,8,27,8,8,8,21,8,8,8,8,8,8,8,8,8,8,0,8,0,8,0,8]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 g6 4. O-O Bg7 5. Re1 Nf6 6. c3 O-O 7. d4 d5 8. e5 Ne4 9. Bxc6 bxc6 10. Be3 $1 {[%mdl 4] is more profitable than 10.Nbd2 at the moment. B31: Sicilian: 2...Nc6 3 Bb5 g6.} cxd4 11. cxd4 Qb6 12. Qc1 a5 13. Nc3 Nxc3 14. Qxc3 Bg4 15. Nd2 Rfb8 16. b3 a4 17. h3 Bf5 18. Rec1 h5 19. bxa4 Rxa4 20. Qxc6 Qxc6 21. Rxc6 Rba8 {[#]} 22. Nf3 $146 ({Predecessor:} 22. Rb6 f6 23. exf6 Bxf6 24. Nf3 Rxa2 25. Rxa2 Rxa2 26. Ne5 Bxe5 27. dxe5 Kf7 28. Rb7 {½-½ (51) So,W (2770)-Cordova,E (2592) chess.com INT 2020}) 22... f6 23. Rc7 Bf8 24. Rc6 Bg7 25. Rc7 Bf8 26. exf6 exf6 27. Nh4 Bd3 28. Rd1 {[#]} Rc4 $1 29. Rd7 (29. Rb7 Be4) 29... Bc2 {Threatens to win with ...Ba4.} 30. Ra1 Rca4 31. Rxd5 Rxa2 32. Rxa2 Rxa2 33. Nf3 Be4 34. Rd8 Ra8 (34... Kf7 {is more complex.} 35. Nd2 Ra1+ 36. Kh2 Be7 37. Rd7 Bc6) 35. Rxa8 Bxa8 $11 {[%mdl 4096] Endgame KBB-KBN} 36. Nd2 Bb4 37. f3 Bxd2 38. Bxd2 {KB-KB} Kf7 39. Kf2 Bd5 40. g4 hxg4 {The position is equal.} 41. hxg4 f5 42. gxf5 gxf5 43. Ke3 Ke6 44. Kf4 Ba8 45. Be3 Bd5 46. Bf2 Bc6 47. Be3 Bd5 48. Bf2 Bc6 49. Be3 Bd5 {An uneventful encounter.  Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "5.7"]
[White "Giri, Anish"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1-0"]
[ECO "D41"]
[WhiteElo "2764"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,71,26,19,33,27,-10,31,43,30,13,14,6,19,17,56,49,67,70,80,86,92,80,90,85,89,76,144,158,156,160,136,164,161,134,152,139,308,306,507,513,29977,29978,29994,447,428,428,491,456,639,632,633,631,646,666,645,646,633,616,740,664,634,607]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. e4 {[%cal Re4d5] D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} dxe4 {now scores much better than the old 7...Nc6.} 8. Qxd8+ Kxd8 9. Ng5 {White is slightly better.} Be6 {[#]} 10. Bb5 $1 $146 {[%mdl 8] An important novelty.} ({Predecessor:} 10. Nxe6+ fxe6 11. Bg5 Nc6 12. O-O-O+ Ke8 13. Bb5 Rc8 14. Kb1 Bb4 15. Bxf6 gxf6 16. Nxe4 {½-½ (56) Carlsen,M (2862)-Tari,A (2625) Wijk aan Zee 2021}) 10... a6 11. Ba4 Nbd7 12. O-O b5 13. Bb3 Ke7 14. Be3 h6 15. Ngxe4 Ke8 16. Bd4 Bb4 17. Rae1 Ke7 18. f4 Rhd8 {[#]} (18... Nxe4 $142 19. Rxe4 Nc5) 19. f5 $1 $16 {[%cal Rf5e6]} Bxb3 20. Nxf6+ ({Worse is} 20. axb3 Kf8 $11) 20... Kf8 21. Nh5 $36 {[%mdl 2048] White is really pushing.} ({Weaker is} 21. axb3 Nxf6 22. Bxf6 gxf6 $15) 21... Bc4 22. Bxg7+ Kg8 23. Rf4 {Black must now prevent Rg4.} Kh7 $2 {This move loses the game for Black.} (23... f6 $16) 24. Rg4 $18 {Strongly threatening Ne4.} Rg8 $2 {[#]} (24... Rac8 25. Rd1 Bc5+ 26. Kh1 Be7) 25. Ne4 $1 {[%mdl 512] Threatening mate with Nhf6+!} Be7 (25... Rxg7 $18 26. Rxg7+ Kh8) 26. Rd1 Be2 {[#]} 27. Rxd7 (27. Rd6 $142 $1 {[%mdl 512]} f6 28. Rxd7 Rxg7 29. Rxg7+ Kh8 30. Nexf6 Bc5+ 31. Kh1 Bxh5 32. Rh7#) 27... Bxg4 {White is clearly winning.} 28. Rxe7 {[%cal Re4f6]} Bxh5 29. Be5 {And now Nf6+ would win.} Rad8 (29... Rg5 $142 30. Nxg5+ hxg5) 30. h3 Rd1+ 31. Kh2 Rc8 32. Nf6+ {[%mdl 64] Double Attack} Kg7 33. Nxh5+ Kf8 34. Ra7 Rd5 35. Bg7+ Kg8 36. Nf6+ {[%mdl 64] Double Attack.  Weighted Error Value: White=0.24/Black=0.54} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "5.8"]
[White "Nepomniachtchi, Ian"]
[Black "Nakamura, Hikaru"]
[Result "1-0"]
[ECO "C67"]
[WhiteElo "2789"]
[BlackElo "2736"]
[Annotator "TA"]
[PlyCount "127"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,127,30,9,33,13,22,11,34,33,27,25,37,32,26,30,35,38,61,59,66,68,54,32,18,22,54,54,54,54,54,54,54,54,54,54,54,32,54,54,56,54,87,97,109,127,93,90,90,90,135,135,157,146,189,195,364,312,322,28,363,108,340,113,305,302,307,268,252,246,390,361,270,0,65,85,85,85,86,0,4,4,15,0,1835,1804,1704,246,12837,12835,12840,12840,12850,27999,27999,27999,27999,27992,27993,27993,27995,27994,27995,27995,27996,27996,27997,27997,27998,27998,27999,27999]} 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 {9.h3 gains popularity.} Ke8 10. h3 h5 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} 11. Bf4 Be6 12. Ng5 {[#]} Bc4 $146 {The position is equal.} ({Predecessor:} 12... Rh6 13. Rad1 h4 14. b3 Be7 15. Nce4 a5 16. a4 Rg6 17. Rfe1 Rd8 18. Rxd8+ Kxd8 {½-½ (46) Nepomniachtchi,I (2784)-Tabatabaei,M (2629) chess.com INT 2020}) 13. Rfd1 Bb4 14. Nce4 Be2 15. Rdc1 Bc4 16. b3 Bd5 17. Rd1 Be7 {White should prevent ...f6.} 18. c4 Bxe4 19. Nxe4 c5 20. Rd3 Rd8 21. Rad1 b6 22. e6 fxe6 23. Bxc7 Rxd3 24. Rxd3 Kf7 $1 25. Be5 Rd8 26. Rxd8 Bxd8 $14 {[%mdl 4096] Endgame KBN-KBN} 27. Kf1 g6 28. Ke2 Ke8 29. Kf3 Ne7 30. Nd6+ Kf8 31. Nb7 $1 {[%cal Rb7d8]} Nc6 32. Nxd8 Nxd8 $16 {KB-KN} 33. Kf4 Nc6 34. Bc3 $1 Kf7 35. f3 a6 36. a4 a5 $2 (36... h4 {might work better.} 37. Be1 Nd4 38. Bxh4 Nxb3) 37. h4 $18 Ke7 38. g4 $2 (38. g3 $18 Ke8 39. Bf6) 38... Kf7 $2 {[%mdl 8192]} (38... Nd4 $11 39. gxh5 gxh5 40. Bxd4 cxd4) 39. Ke4 $2 (39. gxh5 $1 $18 {is the precise move to win.} gxh5 40. Be5) 39... Ke7 $2 (39... g5 $16) 40. Bb2 $2 (40. gxh5 $18 {and White stays clearly on top.} gxh5 41. Be5) 40... Nd8 $2 (40... Kd7 $16) 41. Be5 Kd7 42. gxh5 gxh5 {intending ...Nf7.} 43. f4 Nf7 (43... Nc6 {keeps fighting.} 44. f5 Ke7) 44. f5 $1 Nh6 45. fxe6+ (45. Kf4 $1 $18) 45... Kxe6 $14 46. Bc7 Nf5 47. Bxb6 Nxh4 48. Bxc5 ({White should play} 48. Bxa5 $16 {And now Bb6 would win.} Ng6 49. Be1) 48... Nf5 $11 49. Bb6 Nd6+ 50. Kf4 Nb7 {[%mdl 8192]} (50... h4 $11) 51. Kg5 $18 Ke5 52. Kxh5 Ke4 $2 (52... Kd6 53. Kg4 Kd7) 53. Kg6 Kd3 54. c5 Nxc5 55. Bxc5 {KB-KP} Kc3 {[#]White mates.} 56. b4 $1 {[%cal Bb3b4,Bb4b5][%mdl 32]} Kc4 {[#]} 57. b5 $1 Kxc5 {KPP-KP} 58. Kf7 Kb6 59. Ke8 Ka7 60. Ke7 Kb7 61. Kd7 Kb6 62. Kc8 Ka7 63. Kc7 Ka8 64. Kb6 {Weighted Error Value: White=0.34/Black=0.31} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "6.1"]
[White "Dubov, Daniil"]
[Black "Nakamura, Hikaru"]
[Result "1/2-1/2"]
[ECO "E05"]
[WhiteElo "2710"]
[BlackElo "2736"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,80,7,13,12,11,2,18,18,28,24,24,7,27,30,26,0,9,0,0,7,8,0,0,-6,0,-12,0,-35,-19,-10,-10,-6,-6,-15,0,0,0,0,0,0,0,0,0,-26,-26,-26,-26,-26,-26,-26,0,0,6,6,6,6,6,6,7,0,5]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 a6 8. a4 Bd7 9. Qxc4 Bc6 10. Bg5 Nbd7 11. Nc3 h6 12. Bxf6 {E05: Open Catalan: 5 Nf3 Be7.} Nxf6 13. Rfd1 $1 {[%mdl 4] is recently more successful than 13.b4.} Bd6 $5 {[%mdl 4] Leaves trodden paths.} 14. Ne5 Bxg2 15. Kxg2 Qe7 16. Nf3 Bb4 17. Na2 Bd6 18. Rac1 a5 19. Re1 c6 20. Nc3 Bb4 21. e4 Rfd8 22. Qe2 c5 23. dxc5 Rac8 24. e5 Bxc3 25. Rxc3 Nd5 26. Rc4 Rxc5 27. Rec1 Rdc8 28. b3 Nb6 29. Rxc5 Rxc5 30. Rxc5 Qxc5 31. Qe4 Nd5 32. Nd2 Qc3 33. Nc4 Qxb3 34. Nxa5 Qb6 35. Nc4 Qc7 (35... Qc6 {is interesting.} 36. Nd2 g6 37. Nf3 Qc3 38. Qh4 Kh7) 36. Nd6 {The position is equal.} Nc3 37. Qxb7 Qxb7+ 38. Nxb7 {[#] Black must now prevent a5.} Nxa4 39. Kf3 Kf8 40. Ke4 Nc3+ {A rather calm draw. Accuracy: White = 92%, Black = 96%.} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "6.2"]
[White "Vidit, Santosh Gujrathi"]
[Black "Nepomniachtchi, Ian"]
[Result "1/2-1/2"]
[ECO "D42"]
[WhiteElo "2726"]
[BlackElo "2789"]
[Annotator "TA"]
[PlyCount "174"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,174,17,5,20,0,0,0,14,20,58,18,47,30,59,34,39,27,22,-23,-17,-16,0,0,0,0,0,0,0,-7,0,-5,-2,-2,0,0,0,-6,0,0,8,0,9,8,11,0,0,0,69,74,343,335,328,328,312,251,274,212,212,41,49,16,71,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 c5 2. c4 Nf6 3. Nc3 d5 4. cxd5 Nxd5 5. e3 e6 6. d4 Nc6 7. Bd3 Be7 8. a3 cxd4 9. exd4 O-O 10. O-O b6 11. Qc2 Nf6 12. Rd1 $1 {[%mdl 4] Threatening d5! 12.Rd1 is the recent fashion.} h6 {[#] D42: Queen's Gambit Declined: Semi-Tarrasch: 5 cxd5 Nxd5 6 e3 Nc6 7 Bd3 .} 13. Be4 $146 ({Predecessor:} 13. d5 exd5 14. Nxd5 Nxd5 15. Qxc6 Be6 16. Qa4 Qc7 17. Bd2 Rad8 18. Rac1 Qb7 19. Qe4 g6 20. Bxh6 {1-0 (32) Radjabov,T (2765)-Nepomniachtchi,I (2784) chess24.com INT 2020}) 13... Nxe4 14. Qxe4 Qe8 15. Re1 Bd7 16. d5 exd5 17. Nxd5 Bd6 18. Qh4 Qd8 {[%cal Rd8h4]} 19. Qh5 {And now Bxh6! would win.} Be6 20. Rd1 Bxd5 21. Qxd5 {[%mdl 64] Double Attack} Bc5 22. b4 Qxd5 23. Rxd5 Rad8 24. Rxd8 Rxd8 25. Bf4 (25. Kf1 {with more complications.} Bd6 26. Bb2 f6 27. g3 Bb8 28. Rc1) 25... Bd4 26. Nxd4 Nxd4 $11 {[%mdl 4096] Endgame KRB-KRN} 27. Kf1 g5 28. Bc7 Re8 29. g4 Nc2 30. Ra2 {[%cal Ra2c2]} Re1+ 31. Kg2 Re2 {Threatens to win with ...Ne1+.} 32. Kg3 b5 33. Bb8 a6 34. Ba7 Kh7 (34... Rd2 $11) 35. Be3 $1 $14 Kg6 $2 {[%mdl 8192] [#]} (35... Nd4 $16 36. Rxe2 Nxe2+ 37. Kf3 Nc3) 36. Rb2 $1 $18 Rxe3+ 37. fxe3 Nxe3 {KR-KN} 38. h3 h5 39. Kf3 Nc4 40. Ra2 (40. Re2 $18) 40... hxg4+ $14 41. hxg4 {Strongly threatening Ke4.} f5 {[#]} 42. gxf5+ ({White should try} 42. a4 $1 $16 {[%cal Ra4b5]}) 42... Kxf5 $11 {The position is equal.} 43. a4 Ke5 44. axb5 axb5 45. Rg2 Kf5 46. Re2 g4+ 47. Kg3 Ne5 48. Rd2 Ke4 49. Rd6 Nd3 50. Rb6 Nxb4 51. Rxb5 Nd5 52. Kxg4 (52. Rb7 {is interesting.} Ne3 53. Re7+ Kd4 54. Rf7 Nd5 55. Rf8) 52... Ne3+ 53. Kg5 Nd5 54. Rb8 Ke5 55. Rd8 Ke4 56. Re8+ Kd4 57. Kf5 Ne3+ 58. Kf4 Nd5+ 59. Kf3 Nc3 60. Rd8+ Nd5 61. Rd7 Ke5 62. Rh7 Kd4 63. Rh5 Nc3 64. Rh8 Nd5 65. Rd8 Ke5 66. Ke2 Ke4 67. Re8+ Kd4 68. Kf3 Nc3 69. Re1 Nd5 70. Rd1+ Ke5 71. Rd2 Nf4 72. Ra2 Nd5 73. Ra4 Nc3 74. Rc4 Nd5 75. Re4+ Kd6 76. Rh4 Ke5 77. Ke2 Nf4+ 78. Kd2 Nd5 79. Ra4 Nf4 80. Ke3 {White threatens Re4+ and mate.} Nd5+ 81. Kf3 Nf6 82. Ra5+ Nd5 83. Rb5 Kd4 84. Rb8 Ke5 85. Re8+ Kd4 86. Rd8 Ke5 87. Rxd5+ Kxd5 {Black escapes into a draw.  Weighted Error Value: White=0.15/Black=0.12} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "6.3"]
[White "Radjabov, Teimour"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2765"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,80,29,25,12,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0,0,0,0,17,6,11,3,4,3,4,3,3,3,3,4,11,0,11,0,0,0,0,0,0,0,7,6,7,7,7,7,7,7,7,7,7,0,7,0,7,0,12]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 O-O 8. Rc1 dxc4 9. Bxc4 c5 10. O-O cxd4 11. Nxd4 Bd7 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 12. Qb3 {The position is equal.} (12. Ne4 {seems wilder.} Qe5 13. Be2 Rd8 14. Qb3 a5 15. Nc3) 12... Nc6 13. Nxc6 Bxc3 14. Qxc3 {[#] Ne5 is the strong threat.} Bxc6 15. Qxf6 gxf6 16. Rfd1 Rfd8 17. f3 f5 18. Kf2 Kg7 19. Ke1 Kf6 20. Rxd8 Rxd8 $11 {[%mdl 4096] [#] Endgame KRB-KRB} 21. Be2 $146 ({Predecessor:} 21. b4 a6 22. Be2 Rg8 23. Kf2 Rd8 24. Ke1 Rg8 25. Kf1 Rd8 26. Ke1 Rg8 27. Kf2 Rd8 28. Rd1 Rc8 29. Rc1 Rd8 30. Rd1 Rc8 31. Rc1 Rd8 32. Rd1 Rc8 {½-½ (32) Rotaru,I (2261)-Stojanovic,N ICCF email 2018}) 21... Rd6 22. Rd1 (22. a3 {is interesting.} Rd5 23. b4 Re5 24. Kf2 Rd5 25. Rd1) 22... Rxd1+ 23. Kxd1 {KB-KB} e5 24. Kd2 f4 25. Bd3 b6 26. Ke2 Bd5 27. a3 Ke6 28. Kf2 Kf6 29. g3 fxg3+ 30. Kxg3 Kg5 31. h4+ Kf6 32. f4 Be6 33. Kf3 exf4 34. Kxf4 Ke7 35. Ke5 f6+ 36. Kd4 Kd6 37. Be2 Bd7 38. Bd3 Be6 39. Be2 Bd7 40. Bd3 Be6 {An uneventful encounter.  Weighted Error Value: White=0.03/Black=0.02} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "6.4"]
[White "Ding, Liren"]
[Black "Grischuk, Alexander"]
[Result "0-1"]
[ECO "A36"]
[WhiteElo "2791"]
[BlackElo "2777"]
[Annotator "TA"]
[PlyCount "147"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,147,24,15,14,0,8,14,11,22,14,18,9,5,9,4,41,-12,-10,-18,-2,-11,-16,-47,0,0,0,0,0,-41,0,0,0,0,0,0,0,4,64,64,64,64,64,64,64,64,75,0,0,0,0,0,0,0,0,0,0,0,279,285,670,670,616,390,413,397,435,336,375,365,344,251,252,250,476,505,476,460,548,537,535,536,507,447,412,132,147,67,531,501,491,449,381,249,200,136,100,-5222,195,118,95,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-12844,-12844,-12845,-12845,-12849,-12849,-12850,-12846,-12846,-12847,-12847,-12847,-12850]} 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Rb1 e6 6. a3 Nge7 7. b4 d6 8. Nf3 O-O 9. O-O b6 {A36: Symmetrical English vs ...g6: 4 Bg2 Bg7.} 10. e3 Bb7 11. Qb3 Qd7 {The position is equal.} 12. Bb2 Ne5 $5 {[%mdl 4] A promising side line.} 13. Nxe5 Bxe5 14. Bxb7 Qxb7 {[#]} 15. d3 $146 ({Predecessor:} 15. Nb5 Bxb2 16. Qxb2 Rfd8 17. Qf6 Rac8 18. d3 a6 19. Nc3 cxb4 20. axb4 b5 21. cxb5 axb5 {½-½ (39) Eljanov,P (2718)-Dominguez Perez,L (2746) Havana 2015}) 15... Nc6 16. b5 (16. f4 $14 Bxc3 17. Bxc3 (17. Qxc3 f6 $11)) 16... Na5 $11 17. Qa2 Rad8 18. Ne4 f5 19. Ng5 Qe7 (19... Rfe8 {looks sharper.} 20. f4 Bxb2 21. Rxb2 h6 22. Nf3 e5) 20. Bxe5 dxe5 21. Nf3 Qf6 22. Qc2 Rd6 23. Qc3 e4 24. Qxf6 Rxf6 25. dxe4 Rf8 26. Rfc1 h6 (26... fxe4 $11 27. Ng5 Rd3) 27. exf5 $14 exf5 28. Kf1 Rfd8 29. Ke2 Kg7 30. Rc2 g5 31. h4 (31. Ne5 $16) 31... g4 $11 32. Ne1 Kf7 33. a4 R8d7 34. Ng2 Rd3 35. Ra1 Rb3 36. Nf4 Rb4 $2 {[%mdl 8192]} (36... Rd6 $11 {and Black is okay.}) 37. Nd3 $18 Ke6 $2 (37... Rxd3 38. Kxd3 Ke6) 38. Nxb4 cxb4 {[%mdl 4096] Endgame KRR-KRN} 39. Rd1 Rc7 40. Rd4 Nb3 41. Rd5 Nc5 42. Rcd2 Ne4 43. R2d4 b3 44. Kd3 Nxf2+ $2 (44... b2 45. Kc2 b1=Q+ {[%mdl 64] Decoy} 46. Kxb1 Nc3+ 47. Kb2 Nxd5 48. cxd5+ Kd6) 45. Kc3 Ne4+ 46. Kxb3 Nxg3 {intending ...Ne4.} 47. Rd6+ Ke5 48. Rxh6 Re7 {and the idea ...Nf1 leaves Black hopeful.} 49. h5 Nf1 50. Rd5+ $2 (50. Kc3 $18 Nxe3 51. Rg6) 50... Ke4 $16 51. Rdd6 (51. a5 $16) 51... Ke5 $2 {[%mdl 8192]} ({Black should try} 51... Kf3 $1 $14) 52. Rhg6 $18 Nxe3 53. h6 $1 g3 54. Rd3 Kf4 55. Rg7 g2 56. Rd2 $2 {[%mdl 8192]} (56. Rxe7 $16 g1=Q 57. Rdxe3 Qd1+ 58. Kc3 Qc1+ 59. Kb3 Qd1+ 60. Kc3 Qc1+ 61. Kd3) 56... Re6 $4 {[%mdl 8192]} (56... Rxg7 $19 57. Rxg2 Rxg2) 57. Rf2+ (57. h7 $18 Rh6 58. a5) 57... Ke4 $16 58. Rfxg2 (58. h7 $1 $16 {[%cal Rh7h8]} Rh6 59. Re7+ Kd3 60. Rxg2 Nxg2 61. Rxa7) 58... Nxg2 $11 59. Rxg2 {Re2+ would kill now.} Rxh6 $16 {KR-KR} 60. Rg7 f4 {Hoping for ...f3.} 61. Rxa7 Rf6 62. Kc3 (62. Re7+ {is interesting.} Kd4 63. Rd7+ Ke3 64. a5 f3 65. axb6 f2 66. b7) 62... f3 63. Re7+ Kf4 {Threatens to win with ...f2.} 64. Re1 f2 65. Rf1 Ke3 {Strongly threatening ...Rf3.} 66. c5 $1 {Black must now prevent Rxf2!} bxc5 {aiming for ...Rf4.} 67. a5 Rf4 $1 {[%cal Rf4b4]} ({Don't go for} 67... Ke2 $2 68. Rxf2+ $3 {[%mdl 512]} Rxf2 69. b6 $18) 68. Ra1 $2 {[%mdl 8192] [#]} (68. b6 $11 Rb4 69. Ra1) 68... Ra4 $3 $19 {[%cal Ra4a1][%mdl 512] Black is clearly winning.} 69. Rh1 (69. Rc1 Rxa5) 69... Rb4 70. Ra1 Rxb5 71. a6 Rb8 72. Kc4 Ra8 73. Kb5 c4 74. Rb1 {Both players deserved the win here.  Weighted Error Value: White=0.40/Black=0.60} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "6.5"]
[White "Carlsen, Magnus"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "A18"]
[WhiteElo "2862"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,74,34,9,10,0,0,0,7,0,0,0,0,0,6,0,43,26,43,32,28,0,4,4,6,6,6,6,4,6,4,7,4,14,8,4,6,6,12,4,4,0,0,0,26,-13,-9,-20,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 e6 2. Nc3 Nf6 3. e4 d5 4. cxd5 exd5 5. e5 d4 6. exf6 dxc3 7. Qe2+ Be6 {A18: English Opening: Flohr-Mikenas System (1 c4 Nf6 2 Nc3 e6 3 e4).} 8. dxc3 Qxf6 9. Nf3 Nd7 10. g3 Bc5 {[#]} 11. Bg2 $146 ({Predecessor:} 11. Ng5 O-O 12. Nxe6 fxe6 13. Be3 Bxe3 14. Qxe3 Qe5 15. Qxe5 Nxe5 16. f4 Ng6 17. Bc4 {½-½ (35) Brodsky,I (2348)-Saydaliev,S (2255) Moscow 2016}) 11... O-O 12. O-O Bd5 13. Re1 c6 14. Bf4 h6 15. Rad1 Rfd8 16. Ne5 (16. Nd2 {with more complications.} g5 17. Bxd5 cxd5 18. Qg4 Qg6 19. Bc7) 16... Nxe5 17. Bxe5 Qe6 18. Bxd5 Rxd5 19. Rxd5 Qxd5 20. c4 Qe6 21. Qd3 Re8 22. Bc3 Qc8 23. Rxe8+ Qxe8 24. Kg2 a6 25. h4 Qe6 26. b4 Be7 27. a4 Qg6 28. Qe2 (28. Qxg6 {looks sharper.} fxg6 29. Kf3 g5 30. h5 Kf7 31. Ke4) 28... Bxh4 {The position is equal.} 29. b5 Bf6 30. Bxf6 Qxf6 31. bxa6 bxa6 $11 {[%mdl 4096] Endgame KQ-KQ} 32. c5 Qe6 33. Qxa6 Qd5+ 34. Kg1 Qd1+ 35. Kg2 Qd5+ 36. Kg1 Qd1+ 37. Kg2 Qd5+ {Weighted Error Value: White=0.04/Black=0.05} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "6.6"]
[White "Vachier-Lagrave, Maxime"]
[Black "Dominguez Perez, Leinier"]
[Result "1-0"]
[ECO "B45"]
[WhiteElo "2784"]
[BlackElo "2758"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 33,105,31,38,9,10,6,0,0,0,14,12,14,21,12,41,30,21,6,59,21,11,11,26,19,25,18,22,22,18,23,25,27,43,43,41,35,51,59,59,80,82,85,114,109,114,114,143,139,1095,1109,1017,1109,1077,1044,992,958,735,733,29971,29973,29976,29976,29977,29978,29977,29973,29979,29980,29982,29983,29984,29985,29985,29986]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qc7 9. f4 Qb6 10. c4 Bb4+ 11. Ke2 f5 12. Nf2 Ba6 13. Kf3 Ne7 14. Be3 Bc5 15. Bxc5 Qxc5 16. Qd6 Qb6 17. b3 c5 {[#]} 18. h4 $1 $146 {[%mdl 8] A top novelty. B45: Sicilian Four Knights.} ({Predecessor:} 18. Rd1 Bb7+ 19. Ke3 Qxd6 20. exd6 Ng6 21. h4 h5 22. Be2 Bxg2 23. Rhg1 Nxh4 24. Nd3 g5 25. fxg5 O-O 26. Kf2 Bc6 {½-½ (34) Jakovenko,D (2698)-Mamedyarov,S (2772) Jerusalem 2019}) 18... Bb7+ 19. Ke3 Nc8 20. Qxb6 {The position is equal.} axb6 21. Be2 d5 22. exd6 Nxd6 23. a4 O-O 24. Rhd1 Rfd8 25. g3 Kf8 (25... e5 $11) 26. Nd3 {Threatens to win with a5!} (26. a5 $5) 26... Be4 27. Ne5 Ke8 28. g4 Nf7 29. Nxf7 Kxf7 30. Rxd8 Rxd8 $11 {[%mdl 4096] Endgame KRB-KRB} 31. a5 bxa5 32. Rxa5 Rb8 33. Rb5 Rc8 34. g5 Rc7 35. b4 cxb4 36. Rxb4 Ke7 37. Ra4 Rb7 38. c5 Bc6 39. Ra6 Bd5 40. Rb6 Rxb6 $4 {[%mdl 8192] [#] A mistake that costs the game.} (40... Ra7 $16) 41. cxb6 $16 {KB-KB} Kd6 42. Kd4 Kc6 43. Ke5 Kxb6 44. Kd6 Bb3 45. h5 h6 46. g6 {White mates.} Bd5 47. Ke7 Kc5 48. Kf8 Kd4 49. Kxg7 e5 50. Kxh6 exf4 51. Kg5 {[%mdl 64] Double Attack} f3 {[#]} 52. Bxf3 $1 {[%mdl 576] Promotion} Bxf3 53. h6 {Weighted Error Value: White=0.03/Black=0.32} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "6.7"]
[White "So, Wesley"]
[Black "Shankland, Sam"]
[Result "1-0"]
[ECO "D11"]
[WhiteElo "2770"]
[BlackElo "2691"]
[Annotator "TA"]
[PlyCount "49"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,49,8,8,6,9,9,0,7,0,6,11,11,14,0,0,0,0,0,14,0,12,-30,0,0,0,0,0,0,0,0,31,13,85,91,119,121,135,99,118,109,880,856]} 1. c4 c6 2. Nf3 d5 3. d4 Nf6 4. g3 Bf5 5. Nc3 e6 6. Nh4 {D11: Slav Defence: 3 Nf3 sidelines and 3...Nf6 4 e3 Bg4.} dxc4 7. Nxf5 exf5 8. e3 {The position is equal.} Nbd7 9. Bxc4 {Threatens to win with Qb3!} Nb6 10. Bb3 Qd7 11. Qf3 {[#]} Bd6 $146 ({Predecessor:} 11... Nbd5 12. Nxd5 cxd5 13. Bd2 Be7 14. O-O O-O 15. Rfc1 Rac8 16. Kg2 g6 17. Qe2 a6 {1-0 (78) Lenderman,A (2640)-Krush,I (2422) Philadelphia 2019}) 12. Bd2 O-O 13. h3 Bb4 14. Bc2 g6 15. O-O-O {[%cal Ba1d1,Bd1d2,Bd2c2][%mdl 32]} Nfd5 (15... Bxc3 $5 16. Bxc3 Nbd5 $11) 16. Nxd5 Bxd2+ 17. Rxd2 {[#] Black must now prevent Nf6+.} cxd5 18. Bd3 Rac8+ 19. Kb1 Nc4 20. Rc2 Rc6 {[#]} (20... Qb5 $11 21. Ka1 Qa5) 21. g4 $1 $16 Rfc8 22. gxf5 Qc7 {Hoping for ...Na3+.} 23. Ka1 Ne5 24. Rxc6 ({But not} 24. dxe5 Rxc2 25. Bxc2 Qxc2 $11) 24... Qxc6 $4 {[%mdl 8192]} (24... Nxf3 $16 25. Rxc7 Rxc7) 25. dxe5 {Accuracy: White = 89%, Black = 76%.} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "6.8"]
[White "Aronian, Levon"]
[Black "Bluebaum, Matthias"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "2781"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "158"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,158,0,18,18,24,16,24,6,12,0,0,0,0,0,0,-25,-22,-18,-14,-31,-16,-22,-6,-29,-17,-50,-44,-46,-48,-38,-40,-64,-66,-61,-73,-46,-15,-20,18,26,36,30,26,-46,-40,-154,-160,-134,-112,-129,-121,-98,-106,-212,-222,-209,-214,-196,-160,-127,-67,-142,-137,-446,-445,-434,-435,-552,-517,-872,-850,-900,-842,-1472,-1353,-2054,-1623,-2160,-2169,-2432,-2074,-2124,-2014,-2506,-1665,-2352,-2329,-1883,-2017,-2203,-1872,-3141,-2556,-4133,-2341,-29969,-29970,-29959,-29948,-29948,-29965,-29962,-29964,-29965,-29969,-29970,-29971,-29971,-29971,-29971,-29972,-29973,-29974,-29976,-29977,-29978,-29977,-29980,-29977,-29978,-29976,-29976,-29976,-29977,-29975,-29975,-29976,-29976,-29977,-29978,-29979,-29979,-29979,-29979,0,-29979,-29979,-29979,-29980,-29980,-29981,-29981,-29981,-29981,-29982,-29982,-29983]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 a6 8. Ne2 {C11: French: Classical System: 4 e5 and 4 Bg5 dxe4.} Qb6 9. Qc1 Be7 10. c3 {White has an edge.} O-O {[#]} 11. h4 $146 ({Predecessor:} 11. g3 cxd4 12. cxd4 f6 13. Bh3 fxe5 14. Bxe6+ Kh8 15. Bxd7 Bxd7 16. dxe5 d4 17. Nexd4 Nxd4 18. Bxd4 {1-0 (45) Motylev,A (2640)-Bluebaum,M (2644) Moscow 2019}) 11... f6 12. h5 h6 13. Rh3 Qa5 (13... Rf7 {seems wilder.} 14. Rg3 Qa5 15. Qd2 cxd4 16. cxd4 Qxd2+ 17. Kxd2 Nb6) 14. Kf2 (14. Qc2 {looks sharper.} cxd4 15. Nexd4 fxe5 16. Nxc6 bxc6 17. fxe5 Qc7 18. Qg6) 14... cxd4 15. cxd4 fxe5 16. fxe5 Ndxe5 17. dxe5 Nxe5 18. Kg1 Ng4 19. Rg3 e5 20. Rxg4 {[%mdl 64] Remove Defender} Bxg4 21. Nxe5 Bxh5 22. Nf4 {[#]} Rac8 $1 23. Qe1 Qxe1 24. Rxe1 Bb4 25. Rb1 d4 26. Bc1 Bf7 27. Nxf7 Rxf7 28. g3 (28. Nd3 $11 Bd6 29. Be2) 28... g5 $15 29. Nd5 (29. Nd3 $15 Bd6 30. Bh3) 29... Bd6 $36 {[%mdl 2048] Black is really pushing.} 30. b3 Rf3 {White must now prevent ...Rc2.} 31. Bg2 Rd3 32. Bb2 Rc2 33. Nf6+ (33. Be4 $17 {was the only defense.} Rxg3+ 34. Kf1) 33... Kf7 $19 34. Ne4 Bxg3 35. Bxd4 Rxd4 36. Nxg3 Rxa2 (36... b5 $17 37. a3 Ra2 38. Rf1+ Ke6 39. Re1+ Kd7 40. Bh3+ Kc7) 37. Rf1+ {[#]} (37. Bxb7 $15 Rg4 38. Rf1+ Ke7 39. Rf3) 37... Rf4 $1 $17 {[%cal Rf4f1] ...Rxf1+ is the strong threat.} 38. Bxb7 $2 {[%mdl 8192]} (38. Bd5+ $17 Kf8 39. Bxb7) 38... Rxf1+ $19 39. Kxf1 a5 40. Nf5 h5 41. Ng3 (41. Bc6 $142 h4 42. Nd6+ Ke6 43. Ne4) 41... h4 42. Ne4 g4 43. Bc8 g3 44. Kg1 Kg6 45. Bh3 Rb2 46. Nc5 Kg5 47. Ne6+ Kf6 48. Nd4 Rf2 49. Nc6 Rh2 50. Bd7 Ra2 51. Bh3 Kg5 52. Ne5 Rb2 53. Nf3+ Kf4 54. Nxh4 Rxb3 55. Bd7 Rb1+ 56. Kg2 Rb2+ 57. Kg1 Ra2 58. Ng2+ Kg5 59. Ne3 a4 60. Nc4 Kf4 61. Bc6 a3 62. Nxa3 Rxa3 {[%mdl 4096] Endgame KR-KB} 63. Kg2 Ra2+ 64. Kg1 Rc2 65. Bd5 Rd2 66. Bb7 Ke5 67. Bc6 Rb2 68. Bf3 Ra2 69. Bc6 Kf4 70. Bd5 Rb2 71. Bc6 g2 72. Kh2 Ke3 73. Kg1 Kf4 74. Kh2 $1 Rf2 {Black mates.} 75. Bd5 g1=Q+ 76. Kxg1 {[#]} Kg3 $1 77. Bg8 Rf6 78. Bh7 Rf7 79. Bg8 Rg7 {Weighted Error Value: White=0.91/Black=0.17} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "7.1"]
[White "Bluebaum, Matthias"]
[Black "Dubov, Daniil"]
[Result "1/2-1/2"]
[ECO "D04"]
[WhiteElo "2670"]
[BlackElo "2710"]
[Annotator "TA"]
[PlyCount "146"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,145,15,24,11,25,33,68,50,75,56,60,53,135,38,40,40,45,45,82,81,104,58,80,47,48,55,61,70,65,12,21,6,15,-27,-18,-20,-32,-6,-12,-50,-15,-4,7,0,0,0,0,0,6,8,8,7,9,4,10,8,7,4,6,6,6,6,6,6,7,6,7,0,16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,226,226,262,220,95,101,385,416,398,281,288,288,288,0,0,0,295,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,29975,0,29975,29975,29976,0,0,0]} 1. d4 Nf6 2. Nf3 d5 3. e3 c5 4. Nbd2 g6 5. dxc5 Bg7 6. c3 {D04: Colle System.} O-O 7. b4 {[#]} Nfd7 $146 ({Predecessor:} 7... Ng4 8. Bb2 a5 9. a3 e5 10. h3 Nxe3 11. fxe3 e4 12. Nxe4 axb4 13. axb4 Rxa1 14. Bxa1 dxe4 15. Qxd8 Rxd8 {1-0 (41) Petr,M (2510)-Karpatchev,A (2475) Germany 2016}) 8. Bb2 {White is slightly better.} b6 9. cxb6 a5 10. b5 a4 (10... Nxb6 $14 11. Be2 Qd6) 11. Rb1 ({White should try} 11. Qc1 $16) 11... a3 $1 $14 {[%cal Ra3b2]} 12. Ba1 Nxb6 13. Be2 Bf5 14. Rc1 Na4 15. O-O Nd7 16. Nb3 {[%cal Bd2b3,Bb3d4,Bd4c6][%mdl 32]} Ndb6 17. Nbd4 $1 Bd7 18. Qb3 Nc5 19. Qb4 (19. Qc2 $14) 19... Qc7 $11 20. Nc6 Qd6 21. Qf4 Qxf4 $1 22. exf4 ({Not} 22. Nxe7+ $2 Kh8 $19) 22... Bxc6 23. bxc6 Rfc8 24. c4 Bxa1 ({Of course not} 24... dxc4 $6 25. Bxg7 Kxg7 26. Bxc4 $14) 25. Rxa1 (25. cxd5 $2 Nb3 $1 $17) 25... Nxc4 26. Bxc4 dxc4 27. Rac1 Ra4 28. Ne5 Nd3 (28... Ne4 {feels hotter.} 29. Rc2 c3 30. f3 Nd2 31. Rfc1 f6) 29. Nxd3 cxd3 {[%mdl 4096] Endgame KRR-KRR} 30. Rfd1 Rd4 31. g3 Rd6 32. Rd2 Kg7 33. Rc3 Rcxc6 34. Rxc6 Rxc6 35. Rxd3 {KR-KR} Ra6 $1 36. Kg2 Kf6 37. Re3 h6 38. g4 g5 39. fxg5+ hxg5 40. Kg3 Ra4 41. h4 gxh4+ 42. Kxh4 e6 43. Kg3 Kg5 44. f3 f5 45. Rxe6 {Strongly threatening Re5.} (45. gxf5 {with more complications.} Kxf5 46. Rb3 e5 47. Rb5 Kf6 48. Rb6+) 45... fxg4 46. Re5+ Kf6 47. f4 Rc4 48. Ra5 Rc1 49. Kxg4 {And now Ra6+ would win.} Rg1+ 50. Kf3 Rf1+ 51. Kg3 (51. Ke2 {is interesting.} Rxf4 52. Rxa3 Ke5 53. Rd3 Rg4 54. Re3+) 51... Rg1+ 52. Kf2 Rb1 (52... Rh1 $11) 53. Rxa3 $18 Kf5 54. Ra4 Rc1 (54... Rh1 $18 55. Kg3 Rg1+ 56. Kf3 Rf1+ 57. Ke3 Re1+ 58. Kd3 Rf1) 55. Ke3 $16 Rc3+ $2 {[%mdl 8192]} (55... Re1+ $16 {might work better.} 56. Kd3 Rf1) 56. Kd4 $18 Rf3 57. Kc5 Rf2 58. a3 Rf3 {[#]} 59. Ra8 $2 (59. Ra6 $1 $18) 59... Ke6 $1 $11 60. Ra4 $2 {[%mdl 8192]} (60. Kc6 $11 Rxf4 61. a4 Rc4+ 62. Kb5) 60... Kf5 $18 {[#]} 61. Ra7 $2 (61. Ra6 $1 $18) 61... Ke6 $11 62. a4 {a5 is the strong threat.} (62. Ra6+ {looks sharper.} Ke7 63. Ra4 Ke6 64. Ra8 Ke7 65. Ra4) 62... Rxf4 63. a5 Rf1 64. Rh7 {Hoping for a6.} Rc1+ 65. Kb6 Kd6 $1 66. Rh6+ Kd7 $1 67. Kb7 {aiming for a6.} Rc7+ 68. Kb6 {Threatening mate with Rh7+.} Rc1 69. Rh7+ Kc8 $2 {[%mdl 8192]} (69... Kd6 $11) 70. Rh8+ Kd7 {If Black can now play ...Rb1+ this consolidates a bit.} 71. a6 Rb1+ 72. Ka7 $2 (72. Kc5 {mates} Rc1+ 73. Kd5 Rd1+ 74. Ke4 Re1+ 75. Kd3 Rd1+ 76. Kc2 Rf1 77. a7) 72... Kc7 73. Rb8 Rxb8 {Weighted Error Value: White=0.17/Black=0.21} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "7.2"]
[White "Shankland, Sam"]
[Black "Aronian, Levon"]
[Result "0-1"]
[ECO "D38"]
[WhiteElo "2691"]
[BlackElo "2781"]
[Annotator "TA"]
[PlyCount "130"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,130,19,7,20,16,30,21,25,20,35,32,37,0,7,0,16,6,0,0,29,0,0,10,35,27,38,35,81,74,74,84,75,79,76,0,0,0,0,0,1,0,0,0,0,0,19,8,8,8,11,0,0,0,0,-52,-42,-241,-229,-313,-336,-339,-336,-345,-345,-470,-212,-205,-62,-613,-583,-919,-754,-1017,-949,-1668,-1473,-1459,-1459,-1452,-1262,-1398,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,0,-8,0,-8,0,0,0,0,0,-29980,-29981,-29981,-29982,-29982,-29983,-29983,-29984,-29984,-29985,-29987,-29988,-29988,-29989]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 O-O {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 8. e3 Bf5 9. Qb3 Bxc3+ {The position is equal.} 10. Qxc3 {The modern move.} g5 $5 {[%mdl 4] An interesting side line.} 11. Bg3 Ne4 12. Qa3 {[#]} (12. Bxc7 $2 Qe7 $19) 12... Nd7 $1 $146 {[%cal Bb8d7,Bd7f6,Bf6e4][%mdl 8] A top novelty.} ({Predecessor:} 12... Nc6 13. Bb5 Ne7 14. Nd2 c6 15. Bd3 Nxd2 16. Kxd2 Bxd3 17. Qxd3 Qa5+ 18. Ke2 f5 {0-1 (67) Carlsen,M (2876)-Firouzja,A (2702) chess24.com INT 2020}) 13. Bd3 Re8 14. Nd2 Ndf6 15. Nxe4 Bxe4 16. O-O Bxd3 17. Qxd3 Ne4 18. Be5 c6 19. f3 Nc5 20. Qf5 ({Don't play} 20. dxc5 Rxe5 21. f4 Re4 $15) 20... Qe7 21. f4 Ne4 {next ...f6 is good for Black.} 22. fxg5 hxg5 23. Rf3 (23. Qg4 $1 $16 {Rf6! is the strong threat.} f6 24. Bxf6 $1 {[%mdl 64] Remove Defender, Decoy} Nxf6 25. Qxg5+ {[%mdl 64] Double Attack} Qg7 26. Qxf6) 23... f6 $1 $11 {[%cal Rf6e5]} 24. Bxf6 Qxf6 25. Qxf6 Nxf6 26. Rxf6 Rxe3 {[%mdl 4096] Endgame KRR-KRR} 27. Rg6+ Kh7 28. Rxg5 Rg8 29. Rxg8 (29. Re5 {seems wilder.} Rd3 30. Re7+ Rg7 31. Rae1 Rxd4 32. Rxg7+ Kxg7 33. Re7+) 29... Kxg8 {KR-KR} 30. Kf2 Rd3 31. g4 Rxd4 32. Kg3 Rd3+ 33. Kh4 ({Better is} 33. Kf4 $11) 33... Rd2 $15 34. h3 (34. Kg3 $1 $15) 34... Rxb2 $19 35. Kg5 d4 36. Rd1 c5 ({Stronger than} 36... Rxa2 37. Rxd4 Rf2 38. Kg6 $11) 37. h4 Rxa2 38. h5 b5 (38... Ra6 $142 39. Kf4 Rd6) 39. h6 {intending Re1.} b4 $1 {[%cal Rb4b3] White must now prevent ...b3.} 40. Re1 $2 {[%mdl 8192]} (40. Rc1 $15) 40... b3 $1 41. Re8+ Kf7 42. h7 Rh2 (42... Kxe8 $2 {too greedy.} 43. h8=Q+ Kd7 44. Qb8 $18) 43. h8=Q Rxh8 44. Rxh8 {KR-KP} c4 45. Kf5 c3 {Strongly threatening ...c2.} 46. g5 {[#]} b2 $2 (46... c2 $1 $19 {[%cal Rc2c1]} 47. g6+ Kg7) 47. g6+ $11 Ke7 48. Rb8 $1 {White threatens g7 and mate.} c2 49. g7 b1=Q 50. g8=Q {[%csl Gf5][%cal Rg8e6]} c1=Q+ 51. Rxb1 Qxb1+ {KQ-KQ} 52. Ke5 d3 53. Qe6+ Kd8 54. Qd6+ Kc8 {( -> ...Qb8)} 55. Qc6+ (55. Qe6+ {feels hotter.} Kb8 56. Qd6+ Ka8 57. Qd5+ Qb7 58. Qxd3 Qb6 59. Qd5+) 55... Kb8 56. Kd4 (56. Qe8+ {with more complications.} Kc7 57. Kd4 Qc2 58. Qe7+ Kb6 59. Qd6+) 56... d2 57. Qd6+ Kb7 58. Qe7+ Kb6 59. Qd8+ $2 {[%mdl 8192]} (59. Qc5+ $11 Kb7 60. Qe7+ Kc8 61. Qe8+ Kc7 62. Qe7+ Kc6 63. Qe8+ Kd6 64. Qf8+ Ke6 65. Qh6+ Kf7 66. Qxd2) 59... Ka6 {Black mates.} 60. Qc8+ Ka5 61. Qc5+ {[#]} Qb5 $1 62. Qxa7+ Kb4 63. Qe7+ Ka4 64. Qa7+ Kb3 65. Qf7+ Kb2 {Weighted Error Value: White=0.65/Black=0.24} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "7.3"]
[White "Dominguez Perez, Leinier"]
[Black "So, Wesley"]
[Result "1-0"]
[ECO "C67"]
[WhiteElo "2758"]
[BlackElo "2770"]
[Annotator "TA"]
[PlyCount "91"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,91,18,23,5,20,10,24,16,0,0,0,0,0,-8,-5,4,14,15,20,19,20,20,34,28,75,78,97,101,148,118,118,87,115,113,126,126,185,178,185,192,199,198,249,254,308,269,267,189,243,233,217,225,223,225,217,226,228,217,262,235,260,217,285,318,353,345,340,338,337,329,313,234,239,191,444,433,369,357]} 1. e4 {CB} e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 O-O 9. Nc3 {[%cal Bb1c3,Bc3d5,Bd5e3,Be3f5][%mdl 32] C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} (9. d4 Bf6 10. Re1 Re8 11. c3 Rxe1 12. Qxe1 Ne8 13. Bd3 d5 14. Bf4 g6 15. Nd2 Ng7 16. Nf3 Bf5 17. Bxf5 Nxf5 18. Qe2 c6 19. Re1 Ng7 20. Be5 Bxe5 21. Nxe5 Qd6 22. Qf3 f6 23. Nd3 Re8 24. Rxe8+ Nxe8 25. Qe3 Kf7 26. Qh6 Kg8 27. Qe3 Kf7 28. Qh6 Kg8 29. Qe3 {½-½ (29) Dominguez Perez,L (2758)-So,W (2770) Lichess.org INT 2020}) 9... Ne8 10. Nd5 Bd6 11. Re2 {White has an edge.} c6 12. Ne3 Be7 13. Nf5 Bf6 14. Qe1 (14. d4 {is more complex.} d5 15. Ng3 Bg4 16. f3 Be6 17. Bf4) 14... d5 15. Ne7+ Kh8 16. Nxc8 Rxc8 17. g3 Qd7 18. d3 {[#]} Nd6 $146 ({Predecessor:} 18... Nc7 19. Qa5 Rfe8 20. Qe1 Rxe2 21. Qxe2 b5 22. c3 d4 23. c4 Re8 24. Qd1 bxc4 25. dxc4 {½-½ (45) Nakamura,H (2787)-Aronian,L (2805) Saint Louis 2014 CBM 162 [CB]}) 19. Bf4 Bxb2 20. Rb1 {[%cal Ba1b1,Bb1b7,Bb7c7][%mdl 32]} Bf6 {[#]} 21. Bh3 $1 {[%cal Rh3d7]} Nf5 (21... Qxh3 22. Bxd6) 22. Bxf5 Qxf5 23. Bd6 Rfd8 24. Rxb7 Bd4 25. Be5 $36 {[%mdl 2048] White is really pushing.} Bb6 {[#]} (25... Bc5 $16) 26. Bc7 $1 $18 {[%mdl 512]} Bxc7 {[#]} 27. Rxc7 {[%mdl 512]} h5 (27... g6 28. Rxa7) 28. Rxa7 Rb8 (28... h4 {keeps fighting.} 29. Ra4 d4) 29. h4 d4 30. Re5 Qf3 31. Kh2 Kg8 (31... Kh7 {is a better defense.} 32. Qe4+ Qxe4 33. Rxe4 (33. Rxh5+ Kg8 $16) 33... Rb2) 32. Re4 Rf8 33. Ra5 {Threatens to win with Rf4.} (33. Rxd4 $6 Rb1 $16) 33... Rb5 34. Rxb5 cxb5 35. Rxd4 {[%mdl 4096] Endgame KQR-KQR} Ra8 36. Rf4 Qd5 37. a3 {[%cal Ba2a3,Ba3a4,Ba4a5][%mdl 32]} Qc5 38. Qb4 Qxc2 39. Qxb5 Qa2 40. a4 ({Resist} 40. Qxh5 Rxa3 41. Qf5 Qe6 $18) 40... Rd8 41. Qc4 Qxc4 42. dxc4 Rc8 43. Kg2 Kf8 44. Rf3 Ke7 $2 (44... Rxc4 45. Ra3 Rc6) 45. a5 Ra8 46. Ra3 {Weighted Error Value: White=0.12/Black=0.23} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "7.4"]
[White "Duda, Jan-Krzysztof"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1/2-1/2"]
[ECO "D97"]
[WhiteElo "2743"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "130"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,130,22,11,18,19,30,18,27,31,41,38,50,33,33,54,87,14,22,22,22,14,22,27,25,32,20,0,22,0,88,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,6,31,31,19,14,14,15,15,15,15,15,31,32,31,18,34,34,34,34,34,34,34,34,34,34,36,8,8,8,8,8,8,0,0,0,8,8,8,8,8,8,57,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Nc6 8. Be2 e5 {[%cal Re5d4] 8...Bg4 is vanishing. D97: Grünfeld: Russian System: 7 e4, replies other than 7...Bg4.} 9. d5 ({Not} 9. Nxe5 Nxd4 10. O-O Nxe4 $1 $17 {[%mdl 512]}) 9... Nd4 10. Nxd4 exd4 11. Qxd4 c6 12. Qc4 b5 13. Qxc6 Bd7 14. Qd6 Re8 15. e5 (15. f3 $16) 15... Ng4 16. e6 fxe6 17. h3 ({Worse is} 17. Nxb5 Be5 $1 $19) 17... Ne5 {[#]} 18. O-O $146 ({Predecessor:} 18. dxe6 Bxe6 19. Qxd8 Raxd8 20. Bxb5 Bc4 21. Bxe8 Nd3+ 22. Kf1 Bxc3 23. bxc3 Nxc1+ 24. Kg1 {½-½ (36) Yu,Y (2763)-Vachier Lagrave,M (2774) Khanty-Mansiysk 2019}) 18... Nf7 19. Qa3 exd5 {Hoping for ...d4.} 20. Bf3 d4 21. Ne4 Bc6 {[#]} (21... Rc8 $11 {keeps the balance.}) 22. Ng5 Bxf3 $11 23. Nxf3 Qd5 24. Rd1 Nd6 25. Qd3 Rac8 26. a4 b4 {[%cal Bb5b4,Bb4b3][%mdl 32]} 27. Be3 {[%cal Re3d4]} Nc4 28. Rab1 {[%cal Re3d4]} Nxe3 29. fxe3 b3 30. exd4 Rc2 31. Rd2 Qc4 (31... Rec8 {looks sharper.} 32. Qe3 a5 33. Rf1 Qc4 34. Rff2 Qd5) 32. Qxc4+ Rxc4 33. Rd3 Rxa4 34. Rxb3 Bxd4+ 35. Nxd4 Rxd4 {[%mdl 4096] Endgame KRR-KRR} 36. Rb7 Rd2 37. Rc1 {Rcc7 is the strong threat.} Rf8 $1 38. b3 (38. b4 {is interesting.} Ra2 39. Rcc7 Rff2 40. Kh1 Rf1+ 41. Kh2) 38... Rf7 39. Rc8+ Kg7 40. Rxf7+ Kxf7 $14 {KR-KR} 41. Rc7+ Kf6 42. Rxa7 Rb2 43. Rb7 h5 44. h4 Rc2 45. Rb4 Kf5 46. Kh2 Rc3 47. Rb5+ Kg4 48. Rb4+ (48. Rg5+ {with more complications.} Kxh4 49. Rxg6 Rh3+ 50. gxh3) 48... Kf5 49. g3 Rc2+ 50. Kh3 Kf6 (50... Rc3 {feels hotter.} 51. Rb5+ Ke4 52. b4 Rb3 53. Rb6 Kf5) 51. Rf4+ Kg7 52. b4 (52. Rc4 $14 Rb2 53. Rb4) 52... Rb2 $11 {The position is equal.} 53. Rc4 Kh6 54. g4 Rb3+ 55. Kg2 {Strongly threatening g5+.} hxg4 56. Rxg4 Kh5 57. Rc4 (57. Rd4 {is interesting.} g5 58. hxg5 Kxg5 59. Kf2 Kf6 60. Ke2) 57... g5 58. hxg5 Kxg5 59. Kf2 Kf5 60. Ke2 Ke5 61. Kd2 Kd5 62. Rc5+ Kd4 63. Rh5 Rxb4 64. Rh4+ Kc5 65. Rxb4 Kxb4 {Weighted Error Value: White=0.07/Black=0.06} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "7.5"]
[White "Grischuk, Alexander"]
[Black "Carlsen, Magnus"]
[Result "1/2-1/2"]
[ECO "B30"]
[WhiteElo "2777"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "129"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,129,45,47,31,38,29,35,37,38,25,18,14,21,0,0,0,3,2,7,8,10,5,11,0,12,17,59,61,65,70,70,63,67,66,64,63,82,57,75,69,69,47,47,38,38,38,47,36,37,0,36,0,31,11,25,11,11,11,29,0,11,11,11,11,11,0,0,0,16,-21,-21,-21,-20,-16,-16,-14,-19,-32,-38,-30,-45,-94,-114,-108,-118,-113,-2,-5,0,0,0,0,0,0,-3,-6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 g6 5. d3 h6 $1 6. O-O {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} Bg7 7. a3 d6 8. b4 {White is slightly better.} Nge7 {[#]} 9. bxc5 $146 ({Predecessor:} 9. Rb1 O-O 10. Nd5 b6 11. c3 Be6 12. Be3 Kh7 13. d4 cxd4 14. cxd4 Bxd5 15. exd5 Nxd4 16. Nxd4 exd4 17. Bxd4 Bxd4 18. Qxd4 {½-½ (36) Cornette,D (2462)-Cmilyte,V (2542) Germany 2019}) 9... dxc5 10. Be3 b6 11. Nd5 (11. a4 {feels hotter.} O-O 12. Rb1 Nd4 13. Nd2 Bb7 14. Rb2) 11... Be6 {[%cal Re7d5]} 12. Nxe7 Qxe7 13. Bd5 Rc8 14. c4 O-O 15. Bd2 Rfe8 16. Re1 Qd7 17. h3 Bxd5 18. exd5 Nd4 19. Nxd4 cxd4 20. Qb3 f5 21. f3 Qc7 22. Rac1 Kh7 23. Re2 a5 24. Rb1 Rb8 25. a4 Bf8 26. Rbe1 Bc5 {[#]} 27. Bf4 $1 {[%cal Rf4e5]} Bd6 28. Bc1 Bb4 29. Bd2 Bc5 30. Bf4 {[%cal Rf4e5]} Bd6 {[#]} 31. Kh1 $1 g5 32. Bc1 Bb4 33. Bd2 Bc5 34. Bc1 Re7 35. Ba3 Qd6 36. Ra1 Kg7 37. Rb2 Rbe8 38. Bxc5 bxc5 39. Qb6 Qxb6 40. Rxb6 $11 {[%mdl 4096] Endgame KRR-KRR} e4 41. d6 Rd7 42. fxe4 fxe4 43. dxe4 Rxe4 44. Rc6 Kf6 45. Rxc5 Rxd6 {White must now prevent ...d3.} 46. Rd1 d3 47. Kg1 {[#]} d2 ({Better is} 47... Re5 $1 $17 {[%cal Re5c5]} 48. Rb5 Rd4 49. Rb6+ Kf7 50. Rb7+ Ke6 51. Rb6+ Ke7 52. Rb7+ Kf6 53. Rb6+ Kf7 54. Rb7+ Ke6 55. Rb6+ Kf7) 48. Kf2 {The position is equal.} Kg6 49. Rd5 Rf6+ 50. Kg3 Rxc4 51. R1xd2 Rxa4 52. Rd8 Re4 53. Rg8+ Kh5 54. Ra8 Rf5 55. Kh2 {g4+ is the strong threat.} g4 56. Ra2 Ree5 (56... gxh3 {is more complex.} 57. R8xa5 Rxa5 58. Rxa5+ Kg4 59. Ra6 h5) 57. Ra4 Rg5 {( -> ...g3+)} 58. hxg4+ Rxg4 59. R4xa5 Rxa5 60. Rxa5+ {KR-KR} Rg5 61. Ra3 Kg6 62. Ra6+ Kh5 63. Ra3 Kg6 64. Ra6+ Kh5 65. Ra3 {Weighted Error Value: White=0.07/Black=0.06} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "7.6"]
[White "Giri, Anish"]
[Black "Ding, Liren"]
[Result "1-0"]
[ECO "C77"]
[WhiteElo "2764"]
[BlackElo "2791"]
[Annotator "TA"]
[PlyCount "125"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,125,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-14,0,0,0,-35,0,0,0,0,0,-18,0,-6,0,0,0,0,0,0,0,0,0,7,14,0,0,0,0,0,9,0,31,14,17,10,45,52,45,53,47,16,41,36,64,65,70,75,95,52,241,215,252,246,373,368,439,407,418,387,431,428,427,422,412,401,486,478,763,492,513,456,426,369,475,446,397,404,350,15,20,27,22,29,39,41,137,131,122,0,100,0,0,0,12843,12843,12844,12844,12845,12845]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3 Bc5 6. O-O O-O {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines.} 7. Bxc6 dxc6 8. d3 Re8 {The position is equal.} 9. Be3 Bd6 10. h3 Nd7 11. Nd2 Nf8 {[#]} 12. Ne2 $146 {[%cal Bc3e2,Be2g3,Bg3f5][%mdl 32]} ({Predecessor:} 12. Nc4 Ng6 13. a4 Be6 14. Nxd6 cxd6 15. a5 d5 16. Na4 Qh4 17. Qf3 Qe7 18. Bb6 {1-0 (49) Staniszewski,J (2498)-Corbat,P (2412) ICCF email 2010}) 12... Ng6 13. Ng3 Be6 14. Nf5 Bf8 15. Qf3 Qd7 16. h4 (16. Rfd1 {is more complex.} f6 17. Qg4 Kh8 18. Qf3 Kg8) 16... Ne7 (16... Bxf5 $5 17. Qxf5 Qxf5 18. exf5 Nxh4 $15) 17. Nxe7+ Bxe7 18. Qg3 f6 19. b3 Kh8 20. Kh1 Rad8 21. f4 exf4 22. Bxf4 Bd6 23. Rae1 h6 24. Nf3 Bxf4 25. Qxf4 c5 26. Rg1 b5 27. g4 Rf8 28. Qg3 Qd6 29. Kh2 c4 30. bxc4 bxc4 31. d4 Rb8 (31... Qa3 {keeps more tension.} 32. d5 Bd7 33. Rg2 c6 34. e5 Be8) 32. d5 {Threatens to win with Qxd6.} Bd7 33. Qxd6 cxd6 34. Nd4 Rb2 35. a3 Ra2 36. Re3 $1 Re8 37. Kg3 Ba4 38. Rg2 c3 $2 (38... Bd7 $14) 39. Nf5 $18 Rxa3 40. Nxd6 Rb8 (40... Rf8 $142 41. g5 h5) 41. g5 Bd7 42. Kf4 fxg5+ 43. hxg5 Rf8+ 44. Ke5 h5 45. g6 Kg8 46. Kd4 h4 47. Rh2 h3 (47... Rf6 $142 48. Nc4 Ra4 49. Rxh4 Bb5) 48. e5 Rf4+ 49. Re4 Ra4+ 50. Ke3 Rfxe4+ 51. Nxe4 {[%mdl 4096] Endgame KRB-KRN} Bf5 52. Nd6 Bxg6 {Black wants to play ...Rh4.} 53. e6 $2 (53. Rxh3 $18 {e6 is the strong threat.} Bxc2 54. e6) 53... Rh4 $1 $11 {With the idea ...Kf8.} 54. e7 a5 $1 55. e8=Q+ Bxe8 56. Nxe8 {KRN-KR} Kf7 (56... Kf8 $1 $14 57. Nc7 Ke7) 57. Nd6+ $16 Kf6 {[#]} 58. Nb5 (58. Kf2 $1 $16) 58... a4 (58... Ke5 $11 {keeps the balance.}) 59. d6 (59. Kf2 $16) 59... Ke6 $11 60. Kd3 {Black must now prevent Re2+.} g5 $2 {[%mdl 8192]} (60... Kd7 $11) 61. Re2+ $18 {White is clearly winning.} Kd7 62. Re7+ Kc6 {[#]} 63. d7 $1 {Weighted Error Value: White=0.29/Black=0.25} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "7.7"]
[White "Nepomniachtchi, Ian"]
[Black "Radjabov, Teimour"]
[Result "1/2-1/2"]
[ECO "B32"]
[WhiteElo "2789"]
[BlackElo "2765"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,95,0,16,8,21,12,14,19,17,20,12,8,5,10,8,9,21,0,0,0,18,8,15,14,26,24,10,16,25,21,26,0,0,0,0,-8,0,0,-6,-14,-14,-14,-14,-14,-27,-14,-12,-56,-47,-51,-61,-80,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-78,-67,-56,-20,-17,-8,-8,-8,-8,0,-80,0,-8,0,-80,0,-8]} 1. e4 {Blatny,P} c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 e5 5. Nb3 Nf6 6. Bg5 Bb4+ 7. c3 {B32: Sicilian: Löwenthal and Kalashnikov Variations.} Be7 8. Bxf6 Bxf6 9. Na3 d6 {[#]} 10. Bc4 $146 ({Predecessor:} 10. Nc4 Be7 11. Ne3 O-O 12. Bc4 Bg5 13. Qd3 Bxe3 14. Qxe3 Be6 15. Qe2 Na5 16. Nxa5 Qxa5 {½-½ (23) Huebner,R (2620)-Anand,V (2635) Munich 1991 CBM 023 [Blatny,P]}) 10... O-O 11. Qd3 a6 12. Rd1 Be7 13. O-O Bg4 14. f3 Bd7 15. Kh1 Qc7 16. Nc2 {[%cal Ba3c2,Bc2e3,Be3d5][%mdl 32]} Rad8 (16... b5 $5 17. Bd5 $8 Rac8 $11) 17. Ne3 Bg5 18. Nd5 Qb8 {[#] White must now prevent ...b5.} 19. Nb6 Be8 {Hoping for ...Qa7.} 20. a4 Kh8 21. Na1 Qa7 22. Nd5 Na5 23. Nb3 Nxc4 24. Qxc4 b5 $36 {[%mdl 2048] Black is more active.} 25. Qc7 Qxc7 26. Nxc7 bxa4 27. Nxe8 Rfxe8 28. Na5 Rb8 29. Nc4 Rec8 $1 {[%cal Rc8c4]} 30. Nxd6 {[%mdl 64] Double Attack} Rc7 31. Ra1 {[#]} Rxb2 (31... Rb6 $1 $17 {[%cal Rb6d6]} 32. Rfd1 Kg8) 32. Rxa4 $11 Rb6 33. Nc4 {[%cal Rc4b6]} Re6 34. g3 g6 35. Rd1 Kg7 36. Kg2 Bf6 37. Rd5 h5 38. h4 Rec6 39. Nd6 {And now Ne8+ would win.} Kf8 {Strongly threatening ...Be7.} 40. Rb4 (40. c4 $11 {keeps the balance.}) 40... Ke7 $17 ({But not} 40... Rxc3 41. Rb8+ Ke7 42. Re8+ Kd7 43. Ra8 $11) 41. Rb7 $1 Rxb7 42. Nxb7 Rxc3 $15 {[%mdl 4096] Endgame KRB-KRN} 43. Nc5 $1 Rc2+ 44. Kf1 Rc3 45. Ke2 (45. Kg2 $1 $11 {remains equal.}) 45... Rc2+ ({Black should play} 45... a5 $17) 46. Kf1 $1 $11 Rc3 ({Black should try} 46... a5 $11) 47. Ke2 $17 Rc2+ (47... a5 $17) 48. Kf1 $1 {Weighted Error Value: White=0.11/Black=0.12} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "7.8"]
[White "Nakamura, Hikaru"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1/2-1/2"]
[ECO "A01"]
[WhiteElo "2736"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "311"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,310,0,0,2,6,-4,6,1,13,4,0,6,34,27,52,28,66,21,45,22,22,19,15,27,27,0,0,-6,-9,-6,-10,-10,-8,0,0,0,0,0,0,-6,10,0,0,0,10,16,11,-11,0,0,0,0,0,0,0,-95,-110,-173,-183,-162,-163,-198,-185,-231,-229,-227,-147,-142,90,88,90,97,137,137,276,276,260,246,300,122,122,122,122,122,122,125,145,145,154,61,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,147,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,191,147,191,191,191,147,191,147,191,0,191,0,198,159,159,159,159,159,159,159,159,159,159,159,159,159,159,159,159,159,159,159,159,159,159,0,159,159,159,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,0,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4574,4567,4567,4574,4567,4567,4574,4567,4574,4567,4574,4574,4574,4574,28,4574,4567,4574,4574,4574,32,4574,28,4574,12,28,28,28,36,4574,4574,4574,36,4566,4566,4574,40,4574,40,4574,4574,4574,612,4574,612,4574,4574,4574,4574,4574,40,612]} 1. b3 e5 2. Bb2 Nc6 3. e3 Nf6 4. Bb5 e4 5. Ne2 a6 6. Bxc6 {A01: Nimzowitsch-Larsen Opening.} dxc6 7. Ng3 h5 8. Nc3 {The position is equal.} Bg4 9. f3 exf3 10. gxf3 {[#]} Be6 $146 ({Predecessor:} 10... h4 11. Nf1 Bh5 12. Qe2 Qd7 13. d3 O-O-O 14. O-O-O Nd5 15. e4 Nxc3 16. Bxc3 Qh3 {½-½ (63) Granda Zuniga,J (2652)-Naroditsky,D (2622) Benasque 2015}) 11. Qe2 Qd7 12. O-O-O O-O-O 13. Rhg1 h4 14. Nge4 (14. Nh1 {with more complications.} Kb8 15. Nf2 Nh5 16. Kb1 c5 17. f4) 14... Nxe4 15. Nxe4 f6 16. Kb1 Kb8 17. d4 Qf7 18. Qf2 Be7 19. Nc5 Bc8 20. e4 g5 21. Nd3 Qh7 22. Qe2 Rhe8 23. a4 Qf7 24. Rdf1 Bd6 25. Qf2 Qh7 26. Re1 Qf7 27. f4 gxf4 28. Nxf4 h3 29. d5 cxd5 30. Nxd5 f5 31. Rgf1 Rg8 32. Ne3 (32. Qh4 $11 {remains equal.}) 32... f4 $17 33. Nc4 (33. Qf3 $17 {is a better defense.}) 33... Bb4 $19 34. Rc1 Rg2 35. Qf3 Rxh2 36. Be5 Rg2 37. Bxf4 Qh7 38. Ne3 Rgg8 (38... Rg6 $17 {stays on course.} 39. Nd5 Bd6 40. Bxd6 Rgxd6) 39. Nd5 $16 Rxd5 40. exd5 Ba3 {...Qh8 is the strong threat.} 41. Rce1 $1 Bb4 (41... Qg6 $16 42. Qf2 Qf7) 42. Qe4 $18 Qxe4 43. Rxe4 Bc5 44. d6 (44. b4 $18 {has better winning chances.} Bd6 45. Bxd6 cxd6 46. Rh4) 44... Bxd6 $16 45. Bxd6 cxd6 {[%mdl 4096] Endgame KRR-KRB} 46. Rh4 Kc7 47. Rf6 Rg7 48. Rhh6 Bd7 49. Rxd6 (49. Kb2 $16) 49... h2 (49... Rg1+ $14 50. Kb2 h2) 50. Rd1 $1 $18 Rg1 51. Rc1 ({But not} 51. Kc1 $2 Bg4 $19) 51... Rg2 52. Kb2 {aiming for Rh1.} Bf5 {Black hopes to continue with ...Be4.} 53. Rh1 Rxc2+ 54. Ka3 Be4 55. R1xh2 Rxh2 56. Rxh2 {KR-KB} a5 57. Kb2 b6 58. Rh4 Bd5 59. Rh7+ Kc6 60. Kc3 Kc5 61. Rh3 Be6 62. Rh6 Bd5 63. Rh8 Be6 64. Re8 $1 {[%cal Re8e6]} Bd5 65. Re7 Kd6 66. Rg7 Kc5 67. Rg4 Be6 68. Rf4 Bd5 69. Rf6 Be4 70. Rf8 Bd5 71. Rc8+ Kd6 72. Kb2 Kd7 73. Rc3 Kd6 74. Rc1 Be6 75. Rc2 Bd5 76. Ka3 Bc6 77. Rh2 Kc5 78. Rh5+ Bd5 79. Rg5 Kd6 80. Rg1 Kc5 81. Rd1 Bc6 82. Rd8 Bd5 83. Kb2 Bc6 84. Kc2 Bd5 85. Kc3 Kc6 86. Re8 Kc5 $1 87. Rc8+ Kd6 88. b4 axb4+ 89. Kxb4 Bc6 90. Rg8 Bd7 91. Rh8 Kc7 92. Rh7 Kd6 93. Rg7 Bc6 94. Ra7 Bd7 95. Rb7 Kc6 96. Rb8 Kc7 97. Rh8 Kd6 98. Ra8 Bc6 99. Ra7 Bd7 100. Kc4 Bc6 101. Ra6 ({Better is} 101. Kb3 $16) 101... Kc7 $1 $11 102. a5 bxa5 103. Kc5 Bg2 104. Ra7+ Kd8 105. Kd6 Ke8 106. Rg7 Bf1 107. Re7+ Kf8 $1 108. Ke6 {White wants to mate with Rf7+.} Kg8 $2 {[%mdl 8192]} (108... Ba6 $11) 109. Kf6 $18 Bd3 110. Rg7+ Kh8 111. Kf7 a4 112. Rg4 a3 113. Rh4+ Bh7 114. Ra4 {Intending Ra8+ and mate.} Bg8+ 115. Kf8 a2 {[#]} 116. Rh4+ $1 Bh7 117. Rh1 a1=Q 118. Rxa1 Bg8 119. Rg1 Bh7 120. Kf7 Be4 121. Rg8+ Kh7 122. Rg4 {[%cal Rg4h4]} Bd5+ 123. Kf6 Kh8 124. Rh4+ Kg8 125. Rd4 Ba2 126. Rd2 Bb1 127. Rb2 Bd3 128. Rb3 Bc2 129. Rb8+ Kh7 130. Rb2 Bd3 131. Rg2 Kh8 132. Kf7 Bh7 133. Rg7 Bd3 134. Kf8 Bh7 135. Rc7 Bg8 136. Rc8 Kh7 137. Rc3 $2 ({White has to play} 137. Ke7 $18 Kg7 138. Rc2) 137... Kh8 $2 {[%mdl 8192]} (137... Bd5 $11) 138. Rc2 Bh7 139. Rg2 Be4 140. Rg8+ Kh7 {[#]} 141. Rg4 $2 (141. Rg5 $1 $18 Kh6 142. Re5) 141... Bf5 $2 {[%mdl 8192]} (141... Bc2 $11) 142. Rf4 $2 (142. Rg5 $18 {White threatens Kf7 and mate.} Bb1 143. Kf7) 142... Bc2 143. Rf2 (143. Kf7 {looks sharper.} Kh6 144. Rg4 Kh5 145. Rg1 Kh4 146. Ke6) 143... Bd3 144. Rd2 Be4 $2 {[%mdl 8192]} (144... Bc4 $14) 145. Kf7 {[%cal Rd2h2]} Kh8 146. Rd8+ Kh7 147. Rd4 Bg6+ 148. Kf6 $2 (148. Ke7 $18 Kg7 149. Rg4) 148... Bc2 $1 $14 149. Rc4 $2 ({White should play} 149. Rd5 $18 Bb3 150. Rg5) 149... Bb1 $2 {[%mdl 8192]} (149... Bd1 $14) 150. Rc1 Bd3 151. Rd1 (151. Rc7+ $142 Kg8 152. Rg7+ Kh8 153. Rd7) 151... Bc2 152. Rg1 (152. Rd5 $142 Be4 153. Rh5+ Kg8 154. Rg5+ Kh7 155. Rg7+ Kh8 156. Ra7) 152... Kh8 $18 153. Ra1 Bh7 154. Re1 Bg8 155. Rh1+ (155. Re4 $142 Bh7 156. Re8+ Bg8 157. Rd8) 155... Bh7 156. Kf7 {White used his chance.  Weighted Error Value: White=0.14/Black=0.20} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "8.1"]
[White "Dubov, Daniil"]
[Black "Vidit, Santosh Gujrathi"]
[Result "0-1"]
[ECO "C28"]
[WhiteElo "2710"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "66"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,66,5,13,5,7,0,0,6,0,-8,-3,0,0,-10,-13,-21,-15,-47,-34,-66,-57,-79,-62,-74,-39,-205,-212,-206,-209,-208,-201,-202,-201,-198,-208,-200,-189,-487,-481,-471,-450,-445,-435,-1474,-595,-775,-748,-856,-853,-847,-839,-915,-765,-781,-756,-921,-879]} 1. e4 e5 2. Nc3 Nf6 3. Bc4 Nc6 4. d3 Na5 5. Bb3 Nxb3 6. axb3 d5 7. Nf3 {C28: Vienna Game: 2...Nf6 3 Bc4 Nc6.} dxe4 8. Nxe5 exd3 9. O-O {The position is equal.} Be7 10. Nxd3 {[#]} Bg4 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 10... O-O 11. Qf3 c6 12. h3 Re8 13. Rd1 Be6 14. Be3 Qc7 15. Bf4 Qc8 16. Be5 Nd7 {1-0 (37) Firouzja,A (2702)-Carlsen,M (2876) chess24.com INT 2020}) 11. Qe1 O-O 12. Be3 Re8 13. f3 Bf5 14. Qf2 Nd5 15. Nxd5 Qxd5 16. Rad1 Rad8 17. Rfe1 Bb4 18. Re2 {This move loses the game for White.} (18. Nxb4 $15 Qxd1 19. Nd3 Rxd3 20. cxd3 Qxb3 21. Bxa7) 18... Qb5 $19 {[%cal Rf5d3]} ({Stronger than} 18... Bxd3 19. Rxd3 Qb5 20. Rxd8 $11) 19. Bf4 Bxd3 20. cxd3 {[#]} Bc5 $1 {...Rxe2 is the strong threat.} 21. Rxe8+ Rxe8 22. d4 Qxb3 $40 {[%mdl 128] Black attacks with force.} 23. Rc1 {[#]} Bb6 24. Bxc7 $2 (24. Qd2) 24... Rc8 {Black is clearly winning.} 25. Qe1 {Black must now prevent Bxb6.} Qxb2 26. Kh1 {[#]} Ba5 $1 {[%mdl 512]} 27. Qe3 (27. Bf4 $142 Rxc1 28. Bxc1 Qxg2+ 29. Kxg2 Bxe1 30. Ba3) 27... Bxc7 (27... Bd2 $142 28. Qg1 Qxc1 29. Qxc1 Bxc1) 28. h3 {intending Rxc7.} Qb4 29. d5 Qd6 {[%csl Gc7][%cal Rd6h2]} 30. f4 Rf8 31. Rc4 Bb6 32. Qe4 h6 33. g4 Rd8 {Weighted Error Value: White=0.71/Black=0.30} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "8.2"]
[White "Radjabov, Teimour"]
[Black "Nakamura, Hikaru"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2765"]
[BlackElo "2736"]
[Annotator "TA"]
[PlyCount "34"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,34,15,23,14,13,16,29,18,14,27,17,23,33,28,27,17,21,26,21,0,16,0,22,0,13]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. a3 {D37: Queen's Gambit Declined: 5 Bf4.} c5 8. cxd5 Nxd5 9. Nxd5 {White has an edge.} exd5 10. dxc5 Nxc5 11. Be2 Bf6 12. Be5 Bf5 13. Bxf6 $1 {[%mdl 4] outshines the older 13.0-0.} Qxf6 14. Qd4 Qd6 {[#] Black wants to play ...Nb3.} 15. Qd1 $146 {The position is equal.} (15. Rd1 Rfd8 16. Qd2 Qf6 17. Qd4 Qd6 18. Qd2 Qf6 19. Qd4 Qd6 {½-½ (19) Radjabov,T (2765)-Nakamura,H (2736) chess24.com INT 2020}) ({Predecessor:} 15. Rd1 Rfd8 16. Qd2 Qf6 17. Qd4 Qd6 18. Qd2 Qf6 19. Qd4 Qd6 {½-½ (19) So,W (2770)-Radjabov,T (2765) chess24.com INT 2020}) 15... Qf6 16. Qd4 Qd6 {next ...Nb3 is good for Black.} 17. Qd1 Qf6 {A rather calm draw.  Weighted Error Value: White=0.07/Black=0.00} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "8.3"]
[White "Ding, Liren"]
[Black "Nepomniachtchi, Ian"]
[Result "1/2-1/2"]
[ECO "D73"]
[WhiteElo "2791"]
[BlackElo "2789"]
[Annotator "TA"]
[PlyCount "21"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,21,12,14,16,20,12,17,0,22,0,24,0]} 1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. cxd5 cxd5 6. Nf3 Bg7 7. Ne5 {[#] D73: Fianchetto Grünfeld: 5 Nf3 .} Ne4 $146 ({Predecessor:} 7... O-O 8. Nc3 Bf5 9. Be3 Qb6 10. Qd2 Rd8 11. O-O Ne4 12. Nxe4 Bxe4 13. Bh3 Nc6 14. Nxc6 Qxc6 15. Rfc1 Qb6 16. Rc5 e5 17. Rac1 Bf8 {1-0 (35) Ivanchuk,V (2678)-Shankland,S (2691) chess24.com INT 2020}) 8. Nd2 Nf6 9. Nb1 Ne4 10. Nd2 Nf6 11. Nb1 {A rather calm draw.  Weighted Error Value: White=0.08/Black=0.01} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "8.4"]
[White "Carlsen, Magnus"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "A13"]
[WhiteElo "2862"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "40"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,40,10,8,14,-26,-7,-10,-40,-51,0,-6,0,-19,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e3 d5 2. c4 e6 3. Nf3 Nf6 4. b3 c5 5. Bb2 Nc6 6. cxd5 exd5 7. Bb5 Bd6 8. O-O O-O {A13: English Opening: 1...e6.} 9. Bxc6 bxc6 10. Nc3 Bg4 11. Ne2 {[#]} Ne4 $146 (11... Re8 $15) ({Predecessor:} 11... Rb8 12. Qc2 Ne4 13. Ng3 Re8 14. d3 Nxg3 15. hxg3 Qd7 16. Qc3 f6 17. Nh2 h5 {0-1 (27) Gaerths,R (2251)-Kunin,V (2516) Bad Wiessee 2012}) 12. d3 {The position is equal.} Bxf3 13. gxf3 Qg5+ 14. Ng3 $1 Nxg3 15. hxg3 Bxg3 16. fxg3 Qxg3+ 17. Kh1 {[#] Hoping for Qe2.} Qh3+ 18. Kg1 Qg3+ 19. Kh1 {Threatens to win with Qe2.} Qh3+ 20. Kg1 {And now Rf2 would win.} Qg3+ {Weighted Error Value: White=0.10/Black=0.08} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "8.5"]
[White "Vachier-Lagrave, Maxime"]
[Black "Grischuk, Alexander"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2784"]
[BlackElo "2777"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,87,23,18,18,18,8,4,7,7,2,3,8,8,0,10,0,7,0,8,-11,0,0,10,0,11,8,23,14,14,11,9,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 O-O 9. Nc3 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} Ne8 10. d4 Bf6 11. Re1 d5 $1 12. Bf4 c6 13. Ne2 {[#]} g6 $146 ({Predecessor:} 13... Nc7 14. c3 Ne6 15. Bg3 h5 16. h3 Bg5 17. Nc1 h4 18. Bh2 Bf4 19. Nd3 Bxh2+ 20. Kxh2 {1-0 (48) Karjakin,S (2752)-Vidit,S (2726) Chess.com INT 2020}) 14. c3 Ng7 15. Qd2 Re8 16. Ng3 Bd7 17. Bd3 Rxe1+ 18. Rxe1 Qf8 19. Be5 Bxe5 20. Rxe5 f6 21. Re2 Re8 {The position is equal.} 22. h4 Rxe2 23. Nxe2 (23. Qxe2 {keeps more tension.} Ne6 24. Nf1 Nf4 25. Qe3 Nxd3 26. Qxd3 Qd6 27. Qf3) 23... Bf5 24. Nf4 Bxd3 25. Nxd3 Nf5 26. h5 Kf7 27. Qf4 Qd6 28. Qf3 Qe7 29. Kf1 Nd6 30. hxg6+ hxg6 31. Qh3 Kg7 32. Nf4 a5 (32... Qe8 {is interesting.} 33. Ne6+ Kg8 34. Qg4 Nc4 35. Nc5 b6) 33. Qe6 Qxe6 34. Nxe6+ $11 {[%mdl 4096] Endgame KN-KN} Kf7 35. Nc5 Ke7 36. Ke2 g5 37. f3 Kd8 38. g4 b6 39. Nd3 Kd7 40. b3 Nb5 41. Kd2 Nd6 42. Ke2 $1 Nb5 43. Kd2 Nd6 44. Ke2 {A rather calm draw.  Weighted Error Value: White=0.02/Black=0.02} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "8.6"]
[White "So, Wesley"]
[Black "Duda, Jan-Krzysztof"]
[Result "1-0"]
[ECO "D35"]
[WhiteElo "2770"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "179"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,179,29,7,31,16,19,0,0,0,0,8,8,0,12,16,20,0,5,0,0,0,0,0,0,-12,15,0,0,0,-4,-19,-5,-12,-12,-32,-31,-52,-74,-65,-11,-8,0,0,-7,-7,0,-14,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-72,0,0,214,214,563,80,563,80,80,80,80,76,80,80,80,80,101,80,80,73,73,73,80,73,73,73,80,80,80,80,80,0,80,73,73,73,73,47,52,47,62,62,64,64,67,67,62,47,67,62,29964,29965,29964,29965,29965,29966,29965,0,3068,0,29963,29966,29962,29959,29971,29972,29972,29972,29973,29972,29974,29975,29977,29978,29978,29979,29981,29982,29982,29983,29983,29983]} 1. c4 e6 2. Nc3 d5 3. d4 Nf6 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Rb1 $1 {[%mdl 4] now scores much better than the old 7.Nf3.} cxd4 {D35: Queen's Gambit Declined: Exchange Variation.} 8. cxd4 Nc6 9. Nf3 Bb4+ {The position is equal.} 10. Bd2 Bxd2+ 11. Qxd2 O-O 12. Bb5 Ne7 13. O-O b6 {[#]} 14. h4 $5 $146 {[%mdl 8] New and interesting.} ({Predecessor:} 14. Ne5 Bb7 15. Qe3 Ng6 16. Nd7 Re8 17. Nc5 bxc5 18. Bxe8 Rb8 19. Ba4 cxd4 20. Qb3 {1-0 (87) Lupulescu,C (2652)-Druska,J (2508) chess.com INT 2020}) 14... Bb7 15. Rfe1 Rc8 16. h5 h6 $1 17. Ne5 {Hoping for Nd7.} Qd6 18. Rb3 f5 19. f3 a6 20. Bf1 b5 21. Qe3 Rfd8 {White should prevent ...fxe4.} 22. Rd1 Nc6 23. Nxc6 (23. Rbd3 {with more complications.} Re8 24. Ng6 Ne7 25. Ne5 Rc2 26. R3d2) 23... Bxc6 24. a4 {[%cal Ra4b5]} fxe4 25. fxe4 {[%cal Ra4b5]} Be8 (25... bxa4 $15 26. Rb6 Qc7 27. Rxa6 Ra8) 26. axb5 $11 Bxh5 27. Rd2 {aiming for e5.} axb5 28. Rxb5 Bg6 29. Rd1 Rb8 30. e5 Qe7 31. Rxb8 Rxb8 32. Bc4 Rd8 33. Qh3 Bf7 34. Qg4 Qd7 35. Qe4 Qa4 36. Be2 Kh8 37. Kh2 (37. Qh4 {feels hotter.} Rd7 38. Qf2 Bg6 39. Kh2 Kh7 40. Qe3) 37... Bg8 38. Qg4 Qa7 39. Rd2 Qb6 40. Rd3 Qa7 41. Rd1 Qb6 42. Bf3 Qa7 43. Qf4 Qa4 44. Kg3 Qb4 45. Kh3 Rf8 46. Qe3 Rd8 47. g4 Rc8 48. Kg3 Bh7 49. g5 (49. Ra1 $11 {remains equal.}) 49... Rc3 ({Black should try} 49... h5 $1 $17) 50. Qf4 Qb7 $2 (50... Bf5 $11 {and Black stays safe.}) 51. Rc1 $1 $18 Rd3 $2 (51... Qb4 {is more resistant.}) 52. Qf8+ Bg8 53. gxh6 $2 (53. g6 $1 $18 {is the precise move to win.}) 53... Qf7 $16 54. hxg7+ Qxg7+ 55. Qxg7+ Kxg7 {[%mdl 4096] Endgame KRB-KRB} 56. Rc4 Bf7 {White must now prevent ...Bh5.} 57. Kf4 Rd2 58. Bg4 Kf8 59. Rc8+ Ke7 60. Rc7+ Kf8 61. Ke3 Rg2 62. Bf3 (62. Be2 {is interesting.} Bg6 63. Bf3 Rg1 64. Kf2 Rg5 65. Rc8+) 62... Rb2 63. Be2 Bg6 64. Bg4 Bf7 65. Kf4 (65. Rc4 $16) 65... Rb4 (65... Rd2 $11) 66. Rd7 Ke8 67. Rd6 Ke7 68. Bf3 Be8 69. Kg5 Ra4 70. Bg4 Bf7 71. Be2 {Strongly threatening Rd7+!} Rb4 72. Bf3 Be8 73. Kh6 Bf7 74. Bc6 {And now Kg7 would win.} Rb2 $2 {[%mdl 8192] [#] Black is on the road to losing.} (74... Rb1 $14) 75. Kg7 $1 Rc2 76. Rd7+ Ke8 77. Rc7+ Kd8 78. Rd7+ (78. Rxf7 $142 Rxc6 79. Kf6 Kc8 80. Ke7 Rc4 81. Rf8+ Kc7 82. Rd8 Rc6 83. Rd6) 78... Ke8 $18 79. Rc7+ (79. Rxf7+ $18 Rxc6 80. Kf6) 79... Kd8 80. Rxf7 {White mates.} Rxc6 {KR-KR} 81. Kf6 Rc4 82. Kxe6 Rxd4 83. Rf8+ Kc7 84. Ke7 Rh4 85. e6 Rh7+ 86. Kf6 Rh6+ {[#]} 87. Kf7 $1 Rh7+ 88. Kg6 Rh1 89. e7 Rg1+ 90. Kh5 {Weighted Error Value: White=0.20/Black=0.20} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "8.7"]
[White "Aronian, Levon"]
[Black "Dominguez Perez, Leinier"]
[Result "1-0"]
[ECO "B22"]
[WhiteElo "2781"]
[BlackElo "2758"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,111,8,16,12,18,19,39,0,0,0,18,0,0,0,0,0,0,-7,0,-25,-29,-31,4,-3,-14,-55,-52,-40,-40,-48,-34,-38,-11,-45,-55,-56,-31,-54,-7,0,-7,-29,0,0,0,0,4,0,16,0,31,30,42,30,35,35,35,36,55,55,84,84,108,50,102,108,152,152,151,183,185,204,195,203,185,194,195,194,203,177,422,420,408,315,368,339,355,322,662,653,8204,9675,5285,4698,12818,12802,29968,29967,29959,12374]} 1. e4 c5 2. Nf3 e6 3. c3 Nf6 4. e5 Nd5 5. d4 cxd4 6. Bc4 d6 7. cxd4 Be7 8. O-O {B22: Sicilian: 2 c3.} O-O 9. Qe2 Bd7 10. Bxd5 $5 {[%mdl 4] White is slightly better. A promising side line.} exd5 11. Nc3 {[%cal Bb1c3,Bc3b5,Bb5d4][%mdl 32]} Be6 12. Bf4 Nc6 13. Rfd1 Re8 14. h3 {[#]} h6 $146 ({Predecessor:} 14... Bf8 15. Qd2 Rc8 16. exd6 Bxd6 17. Bxd6 Qxd6 18. Re1 f6 19. Rac1 Re7 20. Re3 Rce8 {½-½ (36) Dory,J (2287)-To,N (2291) Hungary 2016}) 15. Nb5 {[%cal Re5d6]} Bf5 16. Qf1 {[%cal Re5d6]} dxe5 17. dxe5 a6 18. Nbd4 Be4 19. e6 Bf6 20. exf7+ Kxf7 21. Rac1 Rc8 22. Be3 Qd7 23. Rd2 Kg8 24. Rcd1 Kh7 25. Ne1 Nxd4 26. Bxd4 Bg5 27. Re2 Qb5 {And now ...Bxg2! would win.} 28. f3 $1 {[%cal Rf3e4]} Bg6 29. Rxe8 Qxf1+ (29... Bxe8 {with more complications.} 30. b3 Bg6 31. Qxb5 axb5 32. Nd3 Bxd3 33. Rxd3 Rc1+) 30. Kxf1 Rxe8 31. Nd3 (31. Kf2 {looks sharper.} a5 32. g3 Rc8 33. Bc3 Bf7 34. Bxa5 Ra8 35. Bc3) 31... Bxd3+ (31... Rc8 {is interesting.} 32. Nc5 Bc2 33. Ra1 Bf5 34. b3 b6) 32. Rxd3 $11 {[%mdl 4096] Endgame KRB-KRB} Rd8 33. Rc3 {Hoping for Rc7!} Rd7 34. Ke2 Kg6 35. Kd3 Bf4 36. Rc8 Kf7 37. h4 h5 38. g4 (38. Rh8 $1 $16) 38... hxg4 (38... Bg3 $14) 39. fxg4 $16 Rc7 40. Rd8 Ke6 41. h5 Bg5 42. Re8+ Kf7 43. Re5 Bf6 44. Rf5 ({Don't play} 44. Rxd5 $6 Ke6 $16) 44... Ke6 45. Bxf6 gxf6 $18 {[#] KR-KR} 46. h6 $1 Rh7 $2 (46... Rc8 {was necessary.} 47. Rh5 Rg8) 47. Rh5 Kf7 {[#]} 48. Kd4 $1 {[%cal Rd4d5]} Kg6 49. Kxd5 Rd7+ 50. Ke6 Rh7 (50... Rd8 51. Ke7 Rh8) 51. a4 b5 52. axb5 axb5 53. b4 Rh8 54. h7 Re8+ 55. Kd7 Rh8 56. Kc6 {Weighted Error Value: White=0.08/Black=0.47} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "8.8"]
[White "Bluebaum, Matthias"]
[Black "Shankland, Sam"]
[Result "0-1"]
[ECO "D04"]
[WhiteElo "2670"]
[BlackElo "2691"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,60,25,21,16,28,26,37,20,28,25,29,29,18,26,35,33,10,-23,-33,-78,-25,-44,0,-2,0,-79,-71,-90,-91,-131,-135,-128,-120,-188,-170,-417,-409,-730,-720,-723,-710,-699,-685,-1192,-1191,-2267,-2218,-1881,-1313,-1291,-1208,-1583,-1225]} 1. d4 Nf6 2. Nf3 d5 3. e3 c6 4. h3 Bf5 5. g4 {[#]} Bg6 $146 ({Predecessor:} 5... Be6 6. Nc3 g6 7. Bg2 Bg7 8. b3 a5 9. a4 Na6 10. Ba3 Qc7 11. Rc1 Rd8 {1-0 (47) Sodomski,A (2304)-Relyea,A (2340) ICCF email 2018}) 6. Ne5 {D04: Colle System.} Nfd7 7. Nxg6 hxg6 8. Bg2 {White is slightly better.} e6 9. Nd2 f5 10. c4 Nf6 11. g5 Ne4 12. Nxe4 dxe4 13. h4 (13. Qb3 $5 {[%cal Rb3b7]}) 13... c5 14. dxc5 Nc6 (14... Nd7 $1 $17) 15. a3 Bxc5 16. b4 Bd6 17. Qb3 (17. c5 $1 $11 {remains equal.} Bc7 18. Ra2) 17... Kf7 $17 18. c5 Be5 $36 {[%mdl 2048] Black is on the roll.} 19. Ra2 {[#]} Rxh4 $3 {[%mdl 576] Remove Defender, Decoy} 20. Rxh4 {Hoping for Kf1.} Qxg5 {[%mdl 64] Double Attack} 21. b5 {[#]} Na5 $1 $19 {[%cal Ra5b3]} 22. Qb4 (22. Qd1 {only move.} Qxh4 23. Qa4) 22... Qxg2 23. Bd2 {[#]} (23. Rd2 $142 Qg1+ 24. Ke2 Qxc1 25. Rd1 Qc2+ 26. Rd2) 23... g5 $1 {Black is clearly winning.} 24. Rh7 {[#]} Kg6 $1 25. Qxa5 Kxh7 26. Kd1 Qxf2 27. c6 b6 28. Qb4 Qf1+ 29. Be1 Bg3 30. c7 Bxc7 {Weighted Error Value: White=0.86/Black=0.23} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "9.1"]
[White "Shankland, Sam"]
[Black "Dubov, Daniil"]
[Result "0-1"]
[ECO "D08"]
[WhiteElo "2691"]
[BlackElo "2710"]
[Annotator "TA"]
[PlyCount "142"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,142,18,20,14,22,6,9,0,0,0,4,0,0,0,0,-10,0,-8,-1,0,22,22,13,1,37,15,31,37,46,47,60,35,43,25,54,35,56,37,33,33,33,33,34,27,35,9,3,0,7,10,4,12,7,0,0,0,7,0,0,0,0,0,0,0,0,-8,-8,-8,0,0,0,-10,0,-64,-64,-193,-192,-192,-192,-173,-191,-188,-175,-183,-171,-176,-155,-158,-77,-115,-121,-96,-81,-100,-56,-56,-58,-59,-59,-59,-59,-76,-59,-76,-76,-246,0,-76,-76,-81,-79,-81,-82,-94,-87,-328,-222,-1106,-689,-731,-720,-966,-751,-929,-938,-878,-843,-1288,-1132,-1701,-1566,-5330,-5330,-4145,-4145]} 1. d4 d5 2. c4 e5 3. dxe5 Ne7 4. Nf3 Nbc6 {[#]} 5. Nbd2 $146 ({Predecessor:} 5. cxd5 Nxd5 6. e4 Ndb4 7. a3 Na6 8. b4 Be7 9. b5 O-O 10. Qxd8 Bxd8 11. bxc6 bxc6 12. Be3 {1-0 (25) Hardy,D-Unterweger,S IECG email 2004}) 5... dxc4 6. e3 {D08: Albin Counter Gambit.} Ng6 7. Qa4 Bd7 8. e6 {The position is equal.} Bxe6 9. Bxc4 Bxc4 10. Qxc4 Be7 11. O-O O-O 12. Qb5 Rb8 13. Ne4 Qd7 14. Bd2 Nce5 15. Qxd7 Nxd7 16. Rac1 c5 17. Rfd1 Rfd8 18. Bc3 Ngf8 19. Kf1 Ne6 20. b3 f6 21. Ke2 Kf7 22. g4 Nb6 23. Ba5 Rxd1 24. Rxd1 Na8 25. h4 b6 26. Bc3 Rd8 27. Rxd8 Nxd8 28. g5 Ne6 29. gxf6 gxf6 30. Ng3 Nac7 31. Nf5 Nd5 32. Bd2 Bf8 33. a4 a6 34. Kd3 b5 35. axb5 axb5 36. Ba5 Ng7 37. Nxg7 Bxg7 $11 {[%mdl 4096] Endgame KBN-KBN} 38. h5 Ke6 39. Bd2 Bh6 40. Nh4 Bg5 41. Ng2 (41. Nf3 $11) 41... f5 $15 42. f4 (42. Ba5 $15) 42... Be7 $1 $19 43. e4 fxe4+ 44. Kxe4 Nf6+ 45. Kf3 Nxh5 46. Ne3 Nf6 47. f5+ Kd6 48. Be1 Nd5 ({Black should try} 48... Nd7 49. Bg3+ Kc6) 49. Bg3+ Kc6 {Strongly threatening ...Nxe3.} 50. Ng4 Bd6 {aiming for ...Bxg3.} 51. Bh4 h5 52. Nf2 $1 Be5 53. Ne4 Nb6 54. f6 Nd7 55. f7 Kd5 (55... Bd6 $5 56. Bg3 Be7 $17) 56. Bg3 Bg7 57. Nd6 $2 {[#]} (57. Kf4 $17 {is a better defense.}) 57... Kc6 $2 (57... b4 $1 $19 {White must now prevent ...Ke6.} 58. Nf5 Bf8) 58. Ke4 {[#]} (58. Nf5 $11 Bf6 59. Bd6) 58... h4 $1 $17 {[%cal Rh4g3][%mdl 512]} 59. Bh2 {[#]} (59. Bxh4 Kxd6) 59... Bf8 $1 {[%cal Rf8d6]} 60. Nf5 h3 61. Bg3 b4 62. Kf3 $2 (62. Bf4 $17) 62... Kd5 63. Kg4 $2 (63. Ne3+ Ke6 64. Nc4) 63... Ne5+ {Black is clearly winning.} 64. Kxh3 Nxf7 65. Ne3+ Kd4 66. Nc4 Kc3 67. Na5 Bd6 68. Bf2 Ne5 69. Be1+ Kc2 70. Bg3 Bc7 71. Nb7 c4 {Accuracy: White = 65%, Black = 83%.} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "9.2"]
[White "Dominguez Perez, Leinier"]
[Black "Bluebaum, Matthias"]
[Result "1/2-1/2"]
[ECO "C11"]
[WhiteElo "2758"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "82"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,82,4,-16,-10,-12,0,0,0,0,0,0,0,-19,0,1,13,0,4,-23,-10,-10,-10,-11,-11,-11,-19,-24,-31,-26,0,0,7,4,4,5,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 a6 8. a3 cxd4 9. Nxd4 Bc5 10. Qd2 O-O 11. O-O-O Rb8 {C11: French: Classical System: 4 e5 and 4 Bg5 dxe4.} 12. h4 Bxd4 13. Bxd4 b5 14. Rh3 Nxd4 15. Qxd4 Qe7 {[#]} 16. h5 $146 ({Predecessor:} 16. b4 Nb6 17. h5 Bd7 18. Qc5 Qd8 19. Bd3 Re8 20. g4 a5 21. g5 axb4 22. axb4 {1-0 (55) Trent,B (2380)-Haugen,A (2391) ICCF email 2018}) 16... h6 17. b4 f6 18. exf6 Qxf6 19. Rf3 Qxd4 20. Rxd4 Nf6 21. a4 {[%cal Ra4b5]} Bd7 22. axb5 axb5 23. Be2 Nxh5 24. f5 {[#] Hoping for fxe6.} exf5 (24... e5 $5 {[%cal Re5d4]} 25. Rxd5 Bc6 26. Rxe5 Bxf3 27. Bxf3 Ng3 $15) 25. Nxd5 {aiming for Ne7+.The position is equal.} Rfe8 26. Bd3 {And now Rh3 would win.} Re5 27. Rh3 Bc6 28. Rxh5 Rxd5 29. Rxd5 Bxd5 30. Rxf5 Bxg2 31. Rxb5 Rxb5 32. Bxb5 $11 {[%mdl 4096] Endgame KB-KB} h5 {[#] Strongly threatening ...h4.} 33. Kd2 h4 {...h3 is the strong threat.} 34. Ke3 g5 35. Be2 Kf8 36. c4 Ke7 37. c5 Bd5 38. Bg4 Bc6 39. Kf2 $1 Bb5 40. Be2 Bxe2 41. Kxe2 g4 {Not much happened in this game.  Weighted Error Value: White=0.03/Black=0.03} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "9.3"]
[White "Duda, Jan-Krzysztof"]
[Black "Aronian, Levon"]
[Result "1/2-1/2"]
[ECO "C78"]
[WhiteElo "2743"]
[BlackElo "2781"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,71,0,0,0,0,0,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,148,148,148,0,0,0,0,0,10,10,10,0,10,0,10,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 6. c3 b5 7. Bb3 d6 8. d4 Bb6 9. dxe5 Nxe5 10. Nxe5 {C78: Ruy Lopez: Archangelsk and Möller Defences.} dxe5 11. Qxd8+ Kxd8 12. Bxf7 Rf8 13. Bd5 Nxd5 14. exd5 Bb7 15. Be3 Bxe3 16. fxe3 Rxf1+ 17. Kxf1 Bxd5 $11 {[%mdl 4096] Endgame KRB-KRN} 18. Nd2 Ke7 19. e4 {[#]} Bc4+ $146 ({Predecessor:} 19... Bc6 20. Ke2 Rf8 21. Ke3 a5 22. g3 h6 23. Rf1 Rxf1 24. Nxf1 Bd7 25. b4 axb4 26. cxb4 Kd6 27. a3 c5 28. Nd2 cxb4 29. axb4 Be6 30. Nb1 {½-½ (30) Solak,D (2601)-Nasuta,G (2517) Skopje 2019}) 20. Nxc4 bxc4 {KR-KR} 21. Rd1 Rd8 22. Rxd8 Kxd8 {KP-KP} 23. Kf2 Ke7 24. Kg3 Kf6 25. Kh4 g6 26. g4 a5 27. g5+ Ke6 28. a4 c5 (28... Ke7 $11 {keeps the balance.}) 29. Kg4 $16 Kd6 30. h4 (30. Kf3 $16) 30... Ke6 {The position is equal.} 31. h5 (31. Kg3 {seems wilder.} Kd7 32. Kh3 Kd6 33. Kg2 Ke7 34. Kf2) 31... Kd6 32. h6 Ke6 33. Kh4 Kd6 34. Kg4 Ke6 35. Kh4 Kd6 36. Kg4 {Weighted Error Value: White=0.07/Black=0.14} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "9.4"]
[White "Grischuk, Alexander"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2777"]
[BlackElo "2770"]
[Annotator "TA"]
[PlyCount "74"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,74,27,0,-7,-9,0,0,0,0,0,-3,0,0,8,0,0,0,0,0,0,0,0,-19,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. h3 Bd7 {The position is equal. C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} 10. Rd1 Be7 {10...Kc8 injects fresh life into this line.} 11. g4 Nh4 12. Nxh4 Bxh4 13. Nd2 Kc8 14. Nf3 Be7 15. Bg5 Bc5 16. Rd3 {[#] Black must now prevent Rad1.} Be6 17. Be3 Bxe3 18. Rxe3 Kd7 19. Ng5 (19. Rd1+ {is interesting.} Ke7 20. Nd4 h5 21. Nf5+ Kf8 22. Ra3) 19... Ke7 20. Nxe6 Kxe6 $11 {[%mdl 4096] Endgame KRR-KRR} 21. f4 g6 22. Rd1 Rad8 23. Red3 Rxd3 24. Rxd3 {KR-KR} h5 {[#]} 25. g5 $146 ({Predecessor:} 25. Kg2 hxg4 26. hxg4 a5 27. Kg3 Rh1 28. Rd8 g5 29. fxg5 Rg1+ 30. Kf3 Rf1+ 31. Kg3 Rg1+ 32. Kf3 Rf1+ 33. Kg3 Rg1+ {½-½ (33) Leko,P (2737)-Adams,M (2743) Dortmund 2014}) 25... a5 26. Kf2 a4 27. Ke3 Ra8 28. Ke4 Ra5 29. c4 Ra8 30. Rf3 Rd8 31. Rd3 Ra8 32. Rd2 c5 33. Rd5 b6 34. Rd3 Rb8 35. Rd5 Ra8 36. Ke3 Rb8 37. Ke4 Ra8 {Not much happened in this game.  Weighted Error Value: White=0.02/Black=0.01} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "9.5"]
[White "Giri, Anish"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1-0"]
[ECO "B67"]
[WhiteElo "2764"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,95,23,24,20,31,15,16,22,55,62,58,66,54,62,64,50,60,37,97,85,194,109,105,104,107,103,177,184,183,174,172,181,177,177,170,182,172,32,172,148,493,471,629,322,353,350,361,345,330,0,375,364,552,541,443,562,531,501,488,158,257,130,150,149,142,135,495,589,578,513,654,231,1983,1822,29989,29990]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. Kb1 Be7 10. Nxc6 $5 {[%mdl 4] An interesting side line.} Bxc6 11. f3 b5 12. h4 {B67: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 Bd7, lines without 9 f4 Be7.} Qc7 13. Ne2 h6 14. Be3 {The position is equal.} d5 15. e5 {[%cal Re5f6]} Nd7 {[%cal Rd7e5]} ({Don't go for} 15... Qxe5 $2 16. Bf4 $18) 16. f4 Nc5 17. Nd4 Ne4 18. Qe1 Bd7 {[#]} 19. g4 $146 ({Predecessor:} 19. Bd3 b4 20. Bxe4 dxe4 21. Qg3 Rg8 22. Rd2 h5 23. Rhd1 Rd8 24. Qf2 Bc8 25. f5 exf5 26. Nxf5 Rxd2 27. Rxd2 Qxe5 28. Nxe7 Qxe7 {1-0 (32) Mutschnik,I (2414)-Martin,S (2273) Germany 2006}) 19... O-O-O (19... b4 $14) 20. Bd3 g5 (20... Kb8 $16) 21. f5 (21. fxg5 $18 hxg5 22. Rf1) 21... gxh4 $16 22. f6 Bc5 23. Rxh4 Qxe5 (23... Bb6 $16 {might work better.}) 24. Bxe4 $18 Qxe4 25. Qc3 Kb7 {[#]} 26. Nxe6 $1 {[%mdl 512]} Bxe6 27. Qxc5 d4 28. Bxd4 Qc6 29. Qa7+ Kc8 {aiming for ...Rd7.} 30. Rh5 $1 {[%cal Rh5c5] White wants to mate with Rc5!} Rd5 {[%mdl 8192]} (30... Rd7 $16 31. Rc5 Rxa7 32. Rxc6+ {[%mdl 64] Discovered Attack} Rc7 33. Rxa6 Bd5) 31. Rxd5 Bxd5 32. Bb6 {Threatens to win with Rxd5!} Re8 {intending ...Qb7.} 33. Qxa6+ Kd7 34. Qa7+ Kc8 35. Qa6+ $2 ({Better is} 35. b3 $18 {And now Rxd5! would win.} Re2 36. c4 Be4+ 37. Ka1 Qxf6+ 38. Bd4) 35... Kb8 $2 {[%mdl 8192]} (35... Kd7 $11 {and Black stays safe.} 36. Qa7+ Kc8) 36. a4 bxa4 (36... Bf3 $142 37. axb5 Qb7) 37. Ba7+ Ka8 {[#]} 38. Qa5 Bc4 {Black hopes to continue with ...Qa6.} 39. Bb6+ Kb7 40. Qa7+ (40. Bf2 $142 {Qa7+ is the strong threat.} Ba6 41. Rd5) 40... Kc8 {[#]} 41. Bc7 Qb7 $16 42. Qxa4 $40 {[%csl Gd1][%cal Ra4d7][%mdl 192] Double Attack. White wants a kill.} Bb5 43. Qa5 Be2 $2 {[%mdl 8192]} (43... Qa6 $16 44. Rh1 Qxa5 45. Bxa5 Re4 46. Rxh6 Rxg4) 44. Rd4 $18 {Black must now prevent Bg3.} ({Stronger than} 44. Qf5+ Re6 $11) 44... Qh1+ 45. Ka2 {White threatens Qc5 and mate.} Qc6 46. Bg3 $2 (46. Bb6) 46... Bc4+ $2 (46... Qa6 47. Qxa6+ Bxa6) 47. b3 Ba6 48. Kb2 {Weighted Error Value: White=0.42/Black=0.79} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "9.6"]
[White "Nepomniachtchi, Ian"]
[Black "Carlsen, Magnus"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "2789"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,69,24,18,18,20,10,5,7,8,3,23,-1,15,15,18,25,22,10,55,33,104,37,57,56,94,64,75,77,73,52,117,69,66,33,138,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. d3 Be7 8. Nc3 {[%cal Bb1c3,Bc3e2,Be2g3][%mdl 32]} O-O 9. a3 {C84: Closed Ruy Lopez: Unusual White 6th moves.} d6 10. Ne2 d5 11. exd5 Nxd5 12. Re1 Kh8 13. Ng3 f6 14. c3 Qd7 15. d4 {[#]} exd4 $146 ({Predecessor:} 15... Rad8 16. dxe5 fxe5 17. Nxe5 Nxe5 18. Rxe5 Bc5 19. Ne4 Bb6 20. Bg5 Nf6 21. Nxf6 Qxd1+ 22. Rxd1 Rxd1+ 23. Bxd1 gxf6 {0-1 (40) Jens,J (2386)-Van de Oudeweetering,A (2324) Netherlands 2011}) 16. cxd4 Rad8 17. Qd3 f5 (17... Na5 $14) 18. Bc2 (18. Bd2 $16) 18... g6 19. Bh6 Rfe8 20. Bb3 Bf6 21. Qd2 Nb6 {[%cal Rc6d4]} 22. Bg5 Qg7 ({Better is} 22... Bxg5 $14 23. Qxg5 Qg7) 23. Rxe8+ Rxe8 24. Re1 Re7 (24... Rxe1+ $14 25. Qxe1 Ne7) 25. d5 ({White should play} 25. Ne2 $1 $16 {Threatens to win with Bh6.} Nc4 26. Bxf6 Qxf6 27. Bxc4 bxc4 28. h3) 25... Nd4 {The position is equal.} 26. Bxf6 Nxf3+ 27. gxf3 Rxe1+ $1 28. Qxe1 {[%cal Re1e8]} Qxf6 29. Qe8+ Kg7 30. Qb8 $1 {[%cal Rb8c7][%mdl 64] Double Attack} Bxd5 31. Qxc7+ Kh6 32. Qf4+ Kg7 (32... Qg5 $2 33. Qd6 $1 $18 {[%mdl 512]}) 33. Qc7+ Kh6 34. Qf4+ Kg7 ({Avoid the trap} 34... Qg5 $2 {[#]} 35. Qd6 $1 $18 {[%mdl 512]}) 35. Qc7+ {Accuracy: White = 76%, Black = 77%.} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "9.7"]
[White "Nakamura, Hikaru"]
[Black "Ding, Liren"]
[Result "1-0"]
[ECO "A01"]
[WhiteElo "2736"]
[BlackElo "2791"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,103,0,6,-4,9,-15,-14,-22,12,17,36,33,58,60,70,88,93,58,79,27,67,63,85,72,83,82,89,84,83,73,100,92,121,124,127,104,120,77,106,63,70,68,59,35,33,36,17,25,40,27,33,33,33,33,33,29,55,0,39,0,0,0,0,-38,-28,-41,-15,-9,0,0,0,-14,-14,-14,-14,-96,-43,-45,-47,-58,-14,-14,-14,-14,-5,-14,0,0,113,120,175,154,526,558,578,575]} 1. b3 e5 2. Bb2 Nc6 3. e3 Nf6 4. Bb5 e4 5. Ne2 a6 6. Bxc6 {A01: Nimzowitsch-Larsen Opening.} dxc6 7. Ng3 h5 8. Nc3 {The position is equal.} Qe7 {White should prevent ...h4.} 9. h4 {[#]} Rh6 $146 ({Predecessor:} 9... Bg4 10. f3 Qe5 11. Ngxe4 Nxe4 12. Nxe4 Qxb2 13. fxg4 Qe5 14. Nf2 hxg4 15. Nxg4 Qg3+ 16. Nf2 Qxg2 17. Qg4 Qxg4 18. Nxg4 g6 {0-1 (18) Rachow,T (1802)-Wolter,U DESC email 2006}) 10. Qe2 Bg4 11. f3 exf3 12. gxf3 Bd7 13. O-O-O O-O-O 14. Qf2 ({White should play} 14. e4 $16) 14... Kb8 15. e4 Bc8 16. Kb1 c5 17. d3 Qe8 18. Rhe1 Nd7 19. Nf5 Rc6 20. Nd5 Ne5 21. Qg3 f6 22. Nfe3 b5 23. Rg1 Kb7 24. Qf2 a5 25. Qe2 Ra6 26. Rg2 a4 27. Rdg1 axb3 28. axb3 Be6 29. Rxg7 Bxg7 30. Rxg7 Bxd5 31. Nxd5 Rd7 32. Rg3 Rf7 33. Qg2 (33. f4 $14 Ng4 34. f5) 33... Ra8 (33... c6 $5 {[%cal Rc6d5]} 34. Ne3 Qd7 $11) 34. Rg7 (34. f4 $5 {[%cal Rf4e5]} Ng4 35. f5 $14) 34... Qf8 35. Rxf7 Qxf7 36. Qf2 Nd7 37. Qg3 Rc8 38. Qf4 {[%cal Rd5f6]} Qg6 39. Bc1 {[#] Ne7 is the strong threat.} Qf7 40. Qf5 c6 41. Ne3 Rg8 42. f4 (42. Qf4 $11) 42... Kc7 ({Black should try} 42... Rg1 $17) 43. Bd2 $15 Ra8 44. Qh3 Kb6 45. Bc1 Nf8 46. Nf5 (46. Qg3 {looks sharper.} Qg6 47. Qh2 Qe8 48. Nf5 Nd7 49. Qf2) 46... Ne6 {Strongly threatening ...Qa7.} 47. Qe3 Qa7 {[%csl Ga8][%cal Ra7a2]} 48. Bb2 Rf8 {[#]} (48... Qa2+ $11 {keeps the balance.} 49. Kc1 Rg8) 49. Ng3 $1 $16 {[%mdl 1024] White has strong compensation.} Qh7 (49... Nd4 $16) 50. f5 Nd4 (50... Nc7 $16 {is more resistant.}) 51. b4 $18 {[%cal Bb3b4,Bb4c5][%mdl 32]} Kb7 52. bxc5 {Weighted Error Value: White=0.12/Black=0.32} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "9.8"]
[White "Vidit, Santosh Gujrathi"]
[Black "Radjabov, Teimour"]
[Result "1/2-1/2"]
[ECO "A16"]
[WhiteElo "2726"]
[BlackElo "2765"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,78,0,11,11,10,0,10,0,6,2,13,0,0,13,25,33,46,41,34,31,33,20,17,9,0,8,16,16,8,0,34,22,50,0,18,17,11,0,0,0,18,0,0,-13,0,0,0,-18,0,0,0,0,16,23,29,0,23,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 Nf6 2. c4 g6 3. Nc3 Bg7 4. g3 c6 5. e4 d5 6. e5 {A16: English Opening: 1...Nf6 with ...d5.} Ne4 7. d4 O-O 8. cxd5 cxd5 9. Bg2 Nc6 10. O-O Nxc3 11. bxc3 {[#]} Qa5 $146 ({Predecessor:} 11... Bf5 12. Nh4 Bc8 13. f4 e6 14. Nf3 b6 15. Ba3 Re8 16. h4 Na5 17. h5 Nc4 {1-0 (35) Grischuk,A (2777)-Mamedov,R (2654) chess24.com INT 2020}) 12. Bd2 Qa6 13. Ng5 h6 14. Nh3 Na5 15. Nf4 e6 16. h4 Bd7 17. a4 Rac8 18. Re1 Qb6 19. Qg4 {With the idea Nxd5!} Nc4 {[#]} 20. Reb1 $1 Qc7 (20... Qa5 21. Be1) 21. Be1 a6 22. Bf1 b5 23. axb5 Bxb5 24. Bd3 Rfe8 25. Bc2 Qe7 26. Rd1 Nb2 27. Rdb1 Nc4 28. Rd1 Nb2 29. Rdc1 Nc4 30. Ra2 a5 31. Rca1 Ra8 32. Nd3 Rec8 33. Qd1 h5 {The position is equal.} 34. Nb2 Qc7 35. Nxc4 Bxc4 36. Ra4 Bb5 37. R4a2 Bc4 38. Ra4 Bb5 39. R4a2 Bc4 {Weighted Error Value: White=0.06/Black=0.06} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "10.1"]
[White "Dubov, Daniil"]
[Black "Radjabov, Teimour"]
[Result "1/2-1/2"]
[ECO "D24"]
[WhiteElo "2710"]
[BlackElo "2765"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,79,20,31,-6,9,8,8,14,1,25,33,31,41,45,62,36,39,31,25,9,4,4,5,0,7,0,10,4,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. Nc3 c5 (4... Be7 5. g4 O-O 6. g5 Ne4 7. Bg2 c5 8. dxc5 Nxc3 9. bxc3 Bxc5 10. h4 Nc6 11. h5 dxc4 12. Qc2 e5 13. Rb1 Bb6 14. Nh4 f5 15. gxf6 Qxf6 16. e3 {0-1 (63) Dubov,D (2702)-Radjabov,T (2765) chess24.com INT 2021}) 5. Bg5 dxc4 6. e4 {D24: Queen's Gambit Accepted: 3 Nf3 Nf6 4 Nc3.} cxd4 7. Qxd4 Qxd4 8. Nxd4 a6 9. Bxc4 Nbd7 {[#]} 10. f3 $146 ({Predecessor:} 10. O-O b5 11. Bd3 Bb7 12. Rfe1 Bb4 13. a3 Bxc3 14. bxc3 Nc5 15. Bxf6 Nxd3 16. Re3 gxf6 17. Rxd3 Bxe4 {0-1 (41) Trevis,R (1470)-Xyko,K (1399) Chessfriend.com 2003}) 10... Bc5 11. Nb3 Ba7 12. Be2 Ne5 13. Bh4 Nh5 14. Bf2 (14. g3 {seems wilder.} Ng6 15. Bg5 Bd7 16. O-O-O h6 17. Bd2) 14... Nf4 {The position is equal.} 15. Bxa7 Rxa7 16. Kf2 Bd7 17. Rhd1 Nxe2 18. Kxe2 Ke7 19. Nc5 Rc8 20. Nxd7 Nxd7 21. Rac1 Raa8 22. Na4 Rxc1 23. Rxc1 $11 {[%mdl 4096] Endgame KRN-KRN} b5 24. Nc5 Rc8 25. Nd3 Rxc1 26. Nxc1 {KN-KN} Kd6 27. Nd3 Nc5 28. Ke3 Nxd3 29. Kxd3 {KP-KP} e5 30. b4 g5 31. Ke3 Ke6 32. g3 f6 33. g4 h6 34. h3 Ke7 35. Kd3 Kd7 36. a3 Kc7 37. Kc3 Kd7 38. Kd3 Kc7 39. Kc3 Kd7 40. Kd3 {Weighted Error Value: White=0.04/Black=0.02} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "10.2"]
[White "Ding, Liren"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1-0"]
[ECO "A36"]
[WhiteElo "2791"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,101,26,22,6,-22,-29,-72,-58,-74,-75,-84,-78,-64,-69,-84,-21,-141,42,39,39,40,35,35,36,36,36,40,40,40,33,37,42,20,20,19,16,0,5,5,9,13,13,0,21,16,16,16,16,16,18,11,18,0,31,31,62,21,21,21,21,10,84,54,118,111,113,102,102,23,23,23,23,0,23,23,31,22,29,32,120,122,154,145,12841,12843,12843,12842,12842,12843]} 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 5. Rb1 Nf6 6. a3 O-O 7. b4 cxb4 8. axb4 a6 {[%cal Ba7a6,Ba6b5][%mdl 32] A36: Symmetrical English vs ...g6: 4 Bg2 Bg7.} 9. d4 $5 {[%mdl 4] A promising side line.} d6 10. Nf3 Bf5 {[#] Black is better.} 11. Rb2 $146 ({Predecessor:} 11. Rb3 Rb8 12. Nh4 Bd7 13. O-O b5 14. cxb5 axb5 15. Qd3 Na7 16. h3 e6 17. d5 {½-½ (53) Mahaffey,S (1595)-Sullivan,G (1803) San Diego 2004}) 11... Ne4 12. Nd5 b5 13. cxb5 axb5 14. O-O Ra1 (14... Be6 $17 15. Ne3 d5) 15. Qc2 {[#]} (15. Ne3 $11 {keeps the balance.}) 15... Nxd4 $2 (15... Nxg3 $1 $17 {[%mdl 512]} 16. Qxc6 Nxf1 17. Bxf1 e5) 16. Nxd4 $14 Bxd4 17. Bxe4 Rxc1 $1 18. Rxc1 Bxb2 19. Qxb2 {Bxf5 is the strong threat.} Bxe4 {[#]} 20. Rc8 $1 {[%cal Rc8d8]} Bxd5 21. Rxd8 Rxd8 {[%mdl 4096] Endgame KQ-KRB} 22. Qd4 Bc4 23. Qa7 {[%mdl 1024] White has compensation.} Kf8 24. Kf1 f6 25. f3 Kf7 26. Kf2 d5 27. e3 h5 28. h4 Bd3 29. Ke1 Bc4 30. Kd2 Rg8 31. Kc3 Be2 32. Qb7 Rd8 33. Kd4 Bc4 34. Kc5 Ke8 35. g4 hxg4 36. fxg4 Kf7 37. Qc7 Rh8 (37... Rd6 $1 $11) 38. Qg3 Rc8+ (38... Rd8 $1 $14) 39. Kb6 $16 Bd3 40. g5 Rc4 {[#]} 41. Qg2 ({White should play} 41. gxf6 $1 $16 {Hoping for Qg5.} exf6 42. Qd6) 41... Re4 $1 $11 42. Qf3 Kg7 43. Kc7 Bc4 44. Qg3 Kf7 45. Qf2 Ke6 46. Kd8 fxg5 ({Better is} 46... Kf7 $14) 47. hxg5 $16 Rg4 {[#]} 48. Ke8 $1 Rxg5 $2 {[%mdl 8192]} (48... Re4 $16 49. Qf3 (49. Qf7+ Ke5 $16) 49... Ke5) 49. Qf7+ $18 {[%mdl 64] Double Attack. White is clearly winning.} Ke5 50. Qf4+ Ke6 51. Qxg5 {Weighted Error Value: White=0.16/Black=0.22} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "10.3"]
[White "Carlsen, Magnus"]
[Black "Nakamura, Hikaru"]
[Result "1-0"]
[ECO "D37"]
[WhiteElo "2862"]
[BlackElo "2736"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,65,26,23,4,37,35,39,-7,-7,-23,-10,-6,-6,-7,-14,-14,6,-11,20,8,25,-28,-20,-16,-12,0,0,0,-11,-28,-18,-22,-10,-16,0,-61,-19,-19,0,0,0,-20,0,0,0,0,0,0,0,0,72,58,59,57,35,0,342,343]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. a3 {D37: Queen's Gambit Declined: 5 Bf4.} c5 (6... Nbd7 7. Nb5 Ne8 8. e3 dxc4 9. Bxc4 c5 10. dxc5 a6 11. Nbd4 Bxc5 12. O-O Qe7 13. Rc1 Bd6 14. Ba2 Ndf6 15. Ne5 Nd7 16. Ndc6 {1-0 (28) Carlsen,M (2863)-Nakamura,H (2736) chess24.com INT 2020}) 7. dxc5 Bxc5 8. b4 $5 {[%mdl 4] White is slightly better. Exploring less charted territory.} Be7 9. e3 a5 {[#]} 10. cxd5 $146 ({Predecessor:} 10. c5 b6 11. cxb6 Qxb6 12. Na4 Qa7 13. b5 Nbd7 14. Nd4 Bb7 15. b6 Nxb6 16. Nb5 {½-½ (48) Luba,L (2130)-Zaskalski,A (2186) Jastrzebia Gora 2018}) 10... Nxd5 11. Nxd5 exd5 12. b5 Nd7 {[%cal Bb8d7,Bd7c5,Bc5b3][%mdl 32]} 13. Be2 Nc5 14. O-O a4 15. Be5 ({Better is} 15. Nd4) 15... Nb3 $11 16. Ra2 Be6 17. Nd4 Bd6 18. Nxe6 fxe6 19. Bb2 Rc8 20. g3 Qd7 21. Bd3 {White wants to play Qh5.} Qf7 22. e4 (22. Bc2 $11) 22... Bc5 {[#] Strongly threatening ...dxe4.} 23. exd5 exd5 {[%cal Rc5f2]} 24. Be5 Rce8 25. Bf4 h6 26. Qg4 Re6 27. h4 $40 {[%mdl 128] White has some attack.} h5 28. Qd1 Rf6 29. Kg2 g6 (29... Rxf4 $11 30. gxf4 Nd4) 30. Bh6 Re8 31. Bg5 Rfe6 32. Bc2 Re1 $2 {[%mdl 8192] [#]} 33. Bxg6 $1 {[%mdl 512] Weighted Error Value: White=0.14/Black=0.38} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "10.4"]
[White "Vachier-Lagrave, Maxime"]
[Black "Nepomniachtchi, Ian"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "2784"]
[BlackElo "2789"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,80,20,23,21,31,39,31,35,32,42,43,38,46,16,33,26,14,0,0,0,0,0,33,0,0,0,0,0,21,33,37,26,45,51,51,30,52,60,48,49,86,52,54,40,42,31,48,0,45,0,0,0,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 {[%cal Bb8d7,Bd7e5,Be5f3][%mdl 32]} 4. O-O a6 5. Bd3 Ngf6 6. Re1 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7.} g6 7. c3 Ne5 8. Be2 {White is slightly better.} Bg7 9. d4 Nxf3+ 10. Bxf3 O-O {[#]} 11. dxc5 $146 ({Predecessor:} 11. Nd2 Nd7 12. Nb3 Rb8 13. Bf4 e5 14. Be3 c4 15. Nd2 b5 16. a4 Qc7 17. axb5 axb5 {1-0 (36) Gao,R (2543)-Peng,H (2207) Beijing 2017}) 11... dxc5 12. Qxd8 Rxd8 13. e5 Nd5 14. a4 Bf5 15. a5 Rd7 16. Na3 Bd3 17. e6 fxe6 18. Rxe6 Rad8 {Black wants to play ...Nxc3!} 19. Re1 Bf6 20. g3 Kg7 21. h4 h6 22. Kg2 c4 23. Nb1 {[%cal Ba3b1,Bb1d2,Bd2e4][%mdl 32]} Rc7 24. Nd2 Rc5 25. Ne4 Rb5 26. Ra2 Rd7 27. Nd2 Rc7 28. Ra4 Rcc5 29. Bxd5 (29. Ne4 {with more complications.} Rc7 30. Bg4 Bc2 31. Ra2 Bd3 32. Be6) 29... Rxd5 {The position is equal.} 30. Nxc4 Rdc5 31. Ne3 Rxa5 32. Rxa5 Rxa5 33. Ng4 g5 34. hxg5 hxg5 35. Be3 Bf5 (35... Be4+ {seems wilder.} 36. f3 Bc6 37. Nxf6 exf6 38. g4 Ra2) 36. Nxf6 exf6 37. f3 g4 38. fxg4 Bxg4 39. Rf1 Rf5 {[#] White must now prevent ...Bh3+!} 40. Rxf5 Bxf5 {Weighted Error Value: White=0.07/Black=0.07} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "10.5"]
[White "So, Wesley"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2770"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "36"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,36,14,13,18,0,4,0,8,0,0,0,0,-4,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. e3 O-O 8. Rc1 dxc4 9. Bxc4 c5 10. O-O cxd4 11. Nxd4 {The position is equal.} Bd7 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 12. Qb3 Nc6 13. Nxc6 (13. Nf3 {seems wilder.} Rfd8 14. a3 Ba5 15. Rfd1 Be8 16. Be2) 13... Bxc3 14. Rxc3 Bxc6 15. Bb5 Bd5 16. Bc4 Bc6 17. Bb5 {[#]} Bd5 $146 ({Predecessor:} 17... Be4 18. Bd3 Bxd3 19. Rxd3 b6 20. Rfd1 Rad8 21. Rxd8 Rxd8 22. Rxd8+ Qxd8 23. g3 h5 24. h4 Qd7 25. Qc2 {½-½ (31) Xu,Y (2557)-Xu,Y (2454) Xinghua 2017}) 18. Bc4 Bc6 {An uneventful encounter.  Weighted Error Value: White=0.05/Black=0.02} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "10.6"]
[White "Aronian, Levon"]
[Black "Grischuk, Alexander"]
[Result "1/2-1/2"]
[WhiteElo "2781"]
[BlackElo "2777"]
[Annotator "TA"]
[PlyCount "45"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,18,0,35]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 {[#]} 6. Be3 $146 ({Predecessor:} 6. h3 e5 7. Nf3 Be7 8. g4 O-O 9. g5 Nh5 10. Bc4 Be6 11. Bb3 g6 12. Be3 Nd7 13. Qd2 Rc8 14. O-O-O Nc5 15. Bxc5 Rxc5 16. h4 {1-0 (70) Giri,A (2764)-Vachier Lagrave,M (2784) Wijk aan Zee 2021}) 6... Ng4 7. Bc1 Nf6 8. Be3 Ng4 9. Bc1 Nf6 10. f3 {10.Nd5 is setting a new trend. B80: Sicilian Scheveningen: 6 g3 and 6 Be3, including English Attack.} e6 11. Be3 b5 12. Qd2 Nbd7 13. g4 b4 14. Nd1 h6 15. c4 bxc3 16. Nxc3 Bb7 17. h4 d5 18. Rg1 dxe4 19. g5 hxg5 20. hxg5 Nd5 21. g6 Nxe3 22. gxf7+ Kxf7 23. Qxe3 {0-1 (30) Aronian,L (2767)-Grischuk,A (2766) Saint Louis 2018} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "10.7"]
[White "Bluebaum, Matthias"]
[Black "Duda, Jan-Krzysztof"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "2670"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "158"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,158,2,0,0,11,11,11,22,20,22,11,47,15,30,11,20,5,0,-14,0,0,0,0,0,0,0,0,0,-3,-3,-8,-2,-9,-2,-14,0,0,0,-4,-6,-16,-20,-25,-20,-89,-67,-41,-50,-77,-79,-81,-60,-60,-36,-63,-45,-43,-41,-39,-46,-72,-61,-44,-2,-8,0,-8,-5,-6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-24,-20,-42,-32,-27,-50,-34,-28,-33,-27,-35,0,0,0,-1,-2,-2,-8,-6,-8,-4,-8,-8,-8,-8,0,-56,0,0,0,0,0,0,0,-67,0,0,0,0,0,0,0,-29974,-29975,-29975,-29976,-29976,-29977,-29977,-29978,-29978,-29979,-29984,-29982,-29984,-29985,-29985,-29986,-29986,-29987,-29987,-29988,-29989,-29990]} 1. d4 Nf6 2. Nf3 e6 3. e3 b6 4. Bd3 Bb7 5. O-O d5 6. b3 Nbd7 {D05: Colle System with ...e6.} 7. c4 dxc4 $5 {[%mdl 4] A promising side line.} 8. bxc4 c5 {[#] The position is equal.} 9. Nc3 $146 ({Predecessor:} 9. Bb2 cxd4 10. exd4 Be7 11. Nbd2 O-O 12. Qe2 Rc8 13. Rac1 Qc7 14. Ne4 Nxe4 15. Bxe4 Bxe4 16. Qxe4 Nf6 17. Qe2 Qb7 18. Qd3 Rfd8 19. Qb3 Rc7 20. Rc2 {0-1 (76) Terry,R (2504)-Dubov,D (2699) chess.com INT 2020}) 9... cxd4 10. exd4 Be7 11. Re1 O-O 12. Bb2 Re8 13. Rc1 Qc7 14. d5 exd5 15. Nxd5 Nxd5 16. cxd5 Qd6 17. Bb5 {And now Ne5 would win.} Bf8 $1 18. Rxe8 Rxe8 19. Bc6 Bxc6 20. dxc6 Nc5 21. Qxd6 Bxd6 22. Rd1 Bb8 23. Nd4 Rd8 24. Rb1 (24. Kf1 {with more complications.} f6 25. Ke2 Rc8 26. g3 Kf7 27. f4) 24... f6 25. Nb5 Ne6 26. g3 a6 27. Nc3 (27. Re1 $11) 27... Rd6 28. Ba3 Rd3 29. Bb2 b5 30. Rc1 Kf7 31. Ne4 Bc7 32. Rc2 Rd5 33. Kg2 f5 34. Nd2 g5 35. h3 h5 36. Nf1 f4 37. g4 Rd3 38. f3 (38. gxh5 {looks sharper.} f3+ 39. Kh1 Nf4 40. Rd2 Nxh3 41. Bd4) 38... hxg4 39. hxg4 Ba5 (39... a5 {seems wilder.} 40. Nd2 Nc5 41. Nb1 Na6 42. Nc3 Nb4) 40. Be5 $1 Bc7 41. Bxc7 Nxc7 $11 {[%mdl 4096] Endgame KRN-KRN} 42. Nd2 Rd5 43. Ne4 Ke7 44. Kf1 Kd8 45. Rh2 Ne6 46. Rh6 Nc5 47. Nf6 Rd3 48. Ke2 Re3+ 49. Kf2 {Black must now prevent Rh8+.} Re6 {Strongly threatening ...Kc7.} 50. Rg6 $1 Nd3+ 51. Kg2 Rxc6 52. Rxg5 ({But not} 52. Rg8+ $2 Ke7 $19) 52... Rc2+ 53. Kh3 Ne1 54. Rf5 Nxf3 {[%csl Gf3][%cal Rc2h2]} 55. Rxf4 Ng1+ 56. Kh4 Rh2+ 57. Kg3 Rxa2 58. Re4 Ra3+ 59. Kf4 Nh3+ 60. Ke5 Kc7 61. Kd5 (61. Nd5+ $11 Kd7 62. Rd4) 61... Ng5 (61... Ra1 $15) 62. Re5 Rf3 63. Ne8+ Kd7 64. Rxg5 {Nd6 is the strong threat.} Kxe8 {KR-KR} 65. Kc5 ({White should try} 65. Rg6 $11) 65... Rc3+ (65... Kf7 $15) 66. Kb6 Ra3 67. Rf5 $1 b4 {[%cal Bb5b4,Bb4b3,Bb3b2][%mdl 32] Hoping for ...b3.} 68. Rf1 b3 69. g5 $2 {[%mdl 8192]} (69. Kc5 $11) 69... b2 {Black mates.} 70. Rb1 Ra2 $1 71. g6 Kf8 72. Kc5 {[#]} a5 $1 {[%cal Ba6a5,Ba5a4,Ba4a3][%mdl 32]} 73. Kd4 {[#]} a4 $1 74. Ke5 Kg7 75. Kf5 a3 76. Rd1 Ra1 77. Rd7+ Kf8 78. g7+ Kg8 79. Kf6 Rf1+ {Weighted Error Value: White=0.07/Black=0.06} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "10.8"]
[White "Shankland, Sam"]
[Black "Dominguez Perez, Leinier"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2691"]
[BlackElo "2758"]
[Annotator "TA"]
[PlyCount "87"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,87,12,14,19,19,21,24,25,8,43,33,28,0,0,0,16,7,7,11,20,12,6,0,7,8,8,8,6,0,0,3,3,3,2,3,3,-16,-27,-32,-30,-14,-21,-56,-35,-43,-39,-54,-29,-31,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,3,4,4,4,4,4,4,4,4,4,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 O-O {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 8. e3 Bf5 9. Qb3 Bxc3+ {White has an edge.} 10. Qxc3 {is cutting edge theory.} g5 11. Bg3 Ne4 12. Qa3 ({Avoid the trap} 12. Bxc7 $2 Qe7 $19) 12... Re8 13. Bd3 h5 {[#]} 14. Ne5 $146 ({Predecessor:} 14. Rc1 Nc6 15. O-O h4 16. Bxc7 Qxc7 17. Nxg5 Qd7 18. Nxe4 Bxe4 19. Bxe4 Rxe4 20. h3 {0-1 (39) Shankland,S (2713)-Vidit,S (2703) Biel 2019}) 14... Qe7 15. Qxe7 Rxe7 16. O-O-O f6 {[#]} 17. f3 $1 fxe5 18. fxe4 Bxe4 19. Bxe4 dxe4 20. h4 exd4 21. Rxd4 Nc6 22. Rd5 Nb4 23. Rxg5+ Rg7 $1 24. Kd2 Rd8+ 25. Ke2 Nd3 26. Bf4 c6 27. g4 Rxg5 28. hxg5 hxg4 $15 {[%mdl 4096] Endgame KRB-KRN} 29. Rg1 Kg7 30. Rxg4 Kg6 31. Rh4 {The position is equal.} Kf5 32. Rh7 Nxf4+ 33. exf4 Kxf4 $11 {KR-KR} 34. g6 Kf5 35. Rxb7 {[#] aiming for g7.} Kxg6 36. Rxa7 Kf5 37. Rc7 Ra8 38. Rxc6 Rxa2 39. Ke3 Rxb2 40. Rc5+ Ke6 41. Kxe4 Rb4+ 42. Kd3 Kd6 43. Rc4 Rxc4 44. Kxc4 {Weighted Error Value: White=0.04/Black=0.03} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "11.1"]
[White "Dominguez Perez, Leinier"]
[Black "Dubov, Daniil"]
[Result "0-1"]
[ECO "B60"]
[WhiteElo "2758"]
[BlackElo "2710"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,98,44,35,36,42,51,37,50,54,31,35,50,31,37,32,26,31,29,37,37,27,30,24,22,44,44,42,32,34,0,0,0,0,0,8,6,6,6,9,-61,85,55,68,-36,-37,-50,-36,-65,-22,-127,-132,-278,-269,-329,-328,-321,-277,-560,-547,-509,-484,-624,-608,-1425,-1389,-4134,-4134,-4133,-1502,-29965,-29966,-29967,-29969,-29970,-29971,-29969,-29972,-29973,-29971,-29971,-29971,-29975,-29976,-29976,-29977,-29973,-29974]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 g6 7. Bxf6 exf6 8. Bb5 {B60: Sicilian: Richter-Rauzer: Unusual Black 6th moves and 6...Bd7 without 7 Qd2.} Bd7 9. Qd2 Bg7 10. O-O-O {White is slightly better.} O-O $1 11. Bxc6 bxc6 12. Nb3 Be6 13. Qxd6 Qb6 14. Qc5 f5 15. Qxb6 axb6 {[#]} 16. exf5 $146 ({Predecessor:} 16. Nd4 Bxa2 17. b3 b5 18. Rhe1 b4 19. Nce2 c5 20. Nf3 fxe4 21. Nd2 f5 22. Nf4 {0-1 (32) Halfhide,S (2102)-Bitalzadeh,A (2400) Netherlands 2015}) 16... Bxf5 17. Nd4 Bd7 18. a3 Rfe8 19. Rd3 h5 20. Rhd1 Rac8 21. f3 c5 22. Ndb5 Bxb5 23. Nxb5 {Threatens to win with Nd6.} Bh6+ 24. Kb1 {Black must now prevent Nd6.} Re2 $1 25. Rg1 Be3 $36 {[%mdl 2048] [#] Black is more active.} 26. Rh1 (26. Nc3 $1 $11 Bxg1 27. Nxe2 Bxh2 28. c4) 26... Re8 (26... c4 $15 {keeps the upper hand.} 27. Rd5 Rxg2) 27. Nd6 Re6 28. Ne4 ({White should try} 28. Nc4 $14) 28... f5 $15 29. Nc3 Rxg2 30. Re1 f4 31. Nd5 (31. h4 $11) 31... Kf7 $17 ({Wrong is} 31... Rxh2 $2 {[#]} 32. Nxf4 $1 {[%mdl 512]} Rh1 33. Rxh1 $18) 32. Nxe3 {Loses the game.} (32. h4 $17 {might work better.}) 32... fxe3 $19 ({But not} 32... Rxe3 33. Rdxe3 fxe3 34. h3 $19) 33. Rdxe3 Rxe3 34. Rxe3 Rxh2 $17 {[%mdl 4096] Endgame KR-KR} 35. b4 $2 (35. Re4) 35... cxb4 $19 36. axb4 Rf2 37. Kb2 h4 38. b5 h3 39. f4 h2 40. Rh3 Kf6 (40... g5 $142 41. fxg5 Kg6) 41. Rh4 g5 {Black mates.} 42. Rh6+ Kf5 43. fxg5 Kxg5 44. Rh7 Kg4 45. Rh6 Kg3 46. Rg6+ Kf3 47. Rf6+ Kg2 48. Rg6+ Kf1 49. Rh6 Kg1 {Weighted Error Value: White=0.64/Black=0.17} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "11.2"]
[White "Duda, Jan-Krzysztof"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "D87"]
[WhiteElo "2743"]
[BlackElo "2691"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,119,29,40,25,35,2,13,-18,-17,-58,-20,-89,-89,-53,-65,-52,-47,-51,-52,-54,-49,-27,-32,-93,-75,-102,0,-4,-4,-4,0,-17,208,-60,0,0,0,0,51,51,51,45,51,51,51,16,51,51,51,51,51,51,51,45,51,0,16,0,51,51,51,51,51,51,51,0,51,0,51,0,51,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 O-O 8. Ne2 c5 9. O-O Nc6 10. Be3 Bg4 11. f3 Bd7 $1 {[%mdl 4] now scores much better than the old 11...Na5.} 12. Rb1 Qc7 13. Qd2 {D87: Exchange Grünfeld: Classical Line: Variations without ...cxd4.} Rfd8 {[#]} 14. Bd5 $146 ({Predecessor:} 14. Rfc1 Be8 15. h4 e5 16. Bd5 cxd4 17. cxd4 exd4 18. Nxd4 Qe5 19. Ne2 b6 20. Bf4 Qe7 {½-½ (40) Giri,A (2764)-Nepomniachtchi,I (2784) chess24.com INT 2020}) 14... e6 15. Bxc6 Bxc6 16. Rb3 b5 17. Bh6 (17. Rbb1 $11) 17... Bxh6 $1 $17 18. Qxh6 b4 19. Rc1 Ba4 20. Rb2 cxd4 21. cxd4 Qb6 22. Qg5 a5 23. Rc5 (23. Qc5 $15 Qa6 24. Qe5) 23... Bd1 24. Qe5 Qd6 (24... Bxe2 $17 25. Rxe2 a4) 25. Qxd6 $11 Rxd6 26. d5 $1 exd5 27. e5 Rb6 {[#]} (27... Re6 $11 {and Black has nothing to worry.}) 28. Nf4 $2 ({And not} 28. Rxd5 Bxe2 29. Rxe2 a4 $17) (28. Nc3 $1 $18 {[%mdl 512]}) 28... b3 (28... d4 $15) 29. Rc1 ({But not} 29. Rxd5 Bc2 $17) 29... Bc2 30. Nxd5 Rb7 (30... Rbb8 $1 $11) 31. Ne3 $36 {[%mdl 2048] White has some pressure.} a4 {And now ...a3 would win.} 32. Nxc2 {[%mdl 64] axb3 is the strong threat. Pin} Rc8 33. axb3 axb3 34. f4 Rc3 {[%mdl 64] [#] Pin} 35. Rcb1 $1 {Hoping for Na1.} Rxc2 (35... bxc2 36. Rxb7) 36. Rxb3 Rxb3 37. Rxb3 {[%mdl 4096] Endgame KR-KR} h5 38. Re3 Kf8 39. g3 (39. Ra3 $14) 39... Ke7 40. Ra3 Rb2 ({Better is} 40... h4 $11) 41. Ra6 Rc2 42. Rd6 Rb2 43. Rc6 Ra2 44. Rd6 Rb2 $1 45. h3 (45. Rf6 $14) 45... Ra2 (45... Rb3 $11) 46. Kf1 ({White should play} 46. h4 $1 $14) 46... Rb2 (46... Ra3 $11) 47. Ke1 (47. h4 $1 $14) 47... Rb3 $11 {The position is equal.} 48. Kf2 h4 $1 49. g4 Rxh3 50. f5 gxf5 51. gxf5 Ra3 52. f6+ Ke8 53. Kg2 Ra5 54. e6 fxe6 55. Rxe6+ Kf7 56. Re4 Kxf6 57. Rxh4 Rg5+ 58. Kf3 Kg6 59. Rg4 Rxg4 60. Kxg4 {Weighted Error Value: White=0.25/Black=0.24} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "11.3"]
[White "Grischuk, Alexander"]
[Black "Bluebaum, Matthias"]
[Result "1/2-1/2"]
[ECO "C11"]
[WhiteElo "2777"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,70,14,22,18,5,6,1,4,4,12,8,10,14,29,20,25,22,18,2,33,27,33,27,32,0,27,27,35,27,36,36,36,36,35,20,35,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 a6 8. Qd2 (8. a3 cxd4 9. Nxd4 Bc5 10. Qd2 O-O 11. h4 Rb8 12. h5 h6 13. g3 Qe7 14. Bg2 Nxd4 15. Bxd4 b5 16. b4 Bxd4 17. Qxd4 f6 18. exf6 Qxf6 19. Ne2 Nb6 20. Qxf6 gxf6 {1-0 (50) Grischuk,A (2777)-Bluebaum,M (2644) Moscow 2019}) 8... b5 9. a3 Qa5 {9...g5 is a critical line. C11: French: Classical System: 4 e5 and 4 Bg5 dxe4.} 10. dxc5 Bxc5 11. Bxc5 Nxc5 12. Nd4 Nxd4 13. Qxd4 Na4 14. b4 {[#]} Qc7 $5 $146 {[%mdl 8] An interesting novelty.} (14... Qb6 {with more complications.} 15. Qxb6 Nxb6 16. a4 d4 17. a5 dxc3 18. axb6 Bb7) ({Predecessor:} 14... Qb6 15. Qxb6 Nxb6 16. Bd3 Bd7 17. Ne2 Ke7 18. Nd4 g6 19. Kf2 h5 20. g3 Rac8 {½-½ (74) Frolyanov,D (2569)-Potkin,V (2599) Sochi 2015}) 15. Nxa4 bxa4 16. c4 dxc4 17. Qxc4 Qxc4 18. Bxc4 Bd7 19. Kf2 Ke7 20. Rhd1 Rhc8 21. Rac1 Bb5 22. Be2 h6 23. Ke3 g5 24. g3 f6 25. Bf3 Rab8 26. Be4 (26. exf6+ {is more complex.} Kxf6 27. Rc5 a5 28. fxg5+ hxg5 29. Rxc8 Rxc8 30. bxa5 Rc3+ 31. Kf2) 26... gxf4+ {The position is equal.} 27. gxf4 fxe5 28. fxe5 Rxc1 29. Rxc1 $11 {[%mdl 4096] Endgame KRB-KRB} Rg8 30. Kf4 Kd7 31. h4 Rf8+ 32. Ke3 Rg8 33. Kf4 Rf8+ 34. Ke3 Rg8 35. Kf4 Rf8+ {Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "11.4"]
[White "Giri, Anish"]
[Black "Aronian, Levon"]
[Result "1/2-1/2"]
[ECO "C78"]
[WhiteElo "2764"]
[BlackElo "2781"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,53,36,0,0,0,14,4,21,11,26,17,23,24,31,31,32,17,22,23,18,17,43,25,28,16,15,25,22,0,0,5,0,0,13,0,0,-4,12,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 6. c3 b5 7. Bb3 d6 8. d4 Bb6 9. Be3 O-O {C78: Ruy Lopez: Archangelsk and Möller Defences.} 10. Nbd2 Re8 11. a4 {axb5 is the strong threat.} Rb8 12. axb5 axb5 {[#]} 13. Qe2 $146 ({Predecessor:} 13. d5 Ne7 14. Bxb6 Rxb6 15. Ne1 Ng6 16. Nd3 Bg4 17. f3 Bd7 18. Nb4 Nf4 19. g3 {½-½ (103) Samunenkov,I (2142)-Balaji,A (2206) Chess.com INT 2020}) 13... Bd7 14. Ng5 (14. Qxb5 $2 {[#]} Nxd4 $1 {[%mdl 512]} 15. Bxf7+ Kxf7 $19) 14... Rf8 {[%cal Re5d4]} 15. dxe5 ({But not} 15. Qxb5 $2 exd4 16. Bxf7+ Rxf7 $19) 15... dxe5 16. Ngf3 Qe7 17. Rfd1 Bxe3 18. Qxe3 Rfd8 19. h3 Be8 20. Nf1 Rxd1 21. Rxd1 b4 22. Ba4 {The position is equal.} bxc3 23. bxc3 Ra8 24. Bb5 Rb8 25. Ba4 Ra8 26. Bb5 Rb8 27. Ba4 {Weighted Error Value: White=0.07/Black=0.05} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "11.5"]
[White "Nepomniachtchi, Ian"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2789"]
[BlackElo "2770"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,84,37,42,39,40,0,27,24,28,22,16,6,16,7,11,0,4,0,0,0,0,5,6,2,6,0,10,18,11,0,0,0,0,3,0,0,0,2,7,0,4,5,3,4,4,3,9,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. e4 {[%cal Re4d5] D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} dxe4 $1 {[%mdl 4] now scores much better than the old 7...Nc6.} 8. Qxd8+ Kxd8 9. Ng5 {White has an edge.} Be6 10. g3 Bb4 {[#] The position is equal.} 11. Bd2 $146 ({Predecessor:} 11. Bg2 Bxc3+ 12. bxc3 Nbd7 13. O-O Nc5 14. Ba3 Rc8 15. Rad1+ Ke8 16. Rd4 b6 17. Rfd1 Bxa2 {1-0 (28) Jean,P (2154)-Shubin,V (2076) ICCF email 2015}) 11... Ke7 12. Bg2 Nc6 13. Nxe6 Kxe6 14. Nxe4 Nxe4 15. Bxe4 Bxd2+ 16. Kxd2 Rad8+ 17. Ke3 Ne5 18. Rac1 Rd7 19. f4 f5 20. Bxf5+ Kxf5 21. Rc5 {[%mdl 64] [#] Pin} Re8 22. Rf1 b6 23. Rb5 {[%mdl 64] Pin} Rd3+ 24. Ke2 Rd7 25. Rf3 Kf6 26. fxe5+ $11 {[%mdl 4096] Endgame KRR-KRR} Ke6 27. Rc3 Kf5 28. Re3 {[#] And now e6+ would win.} Rde7 29. Rf3+ Kg6 30. Re3 Kf5 31. Rf3+ Kg6 32. Kd3 Rxe5 33. Rxe5 Rxe5 {KR-KR} 34. a4 h5 35. b4 Re1 36. Kc4 a6 37. Rd3 {Hoping for Rd6+.} Kf5 38. Rd6 Re4+ 39. Kc3 Re3+ 40. Kc4 Re4+ 41. Kc3 Re3+ 42. Kc4 Re4+ {Weighted Error Value: White=0.02/Black=0.01} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "11.6"]
[White "Nakamura, Hikaru"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2736"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "231"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,231,25,2,8,0,0,0,0,0,0,0,0,0,0,-23,-16,-71,-75,-80,21,13,24,36,37,20,24,5,85,95,89,83,92,92,94,93,92,92,91,70,64,64,66,61,61,61,67,66,65,65,69,65,64,65,77,77,77,79,90,87,95,93,106,110,94,68,68,68,68,60,75,50,75,57,71,71,75,55,55,37,52,52,66,37,37,37,37,32,32,32,32,35,37,24,24,8,8,8,8,8,8,8,24,8,17,8,16,8,9,0,8,8,8,8,8,8,9,9,16,19,36,8,8,8,8,8,8,8,8,8,8,0,0,0,8,8,8,8,8,0,8,8,8,0,8,0,0,0,8,7,8,8,8,8,8,8,8,8,8,0,8,8,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. a3 e5 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 7. Nf5 $1 {The main line 7.Nf5 scores better than 7.Nf3.} d5 8. Bg5 {[%cal Rc3d5]} d4 9. Bxf6 gxf6 10. Nb1 {[%cal Bc3b1,Bb1d2,Bd2e4][%mdl 32]} Bxf5 11. exf5 Qd5 {[#]} 12. Qg4 $146 ({Predecessor:} 12. Qd3 Nd7 13. b4 e4 14. Nc3 Qxf5 15. Qxe4+ Qe5 16. f4 Qxe4+ 17. Nxe4 O-O-O 18. O-O-O {0-1 (37) Saric,I (2667)-Cheparinov,I (2670) chess24.com INT 2020}) 12... h5 13. Qh4 (13. Qf3 $11 Qxf3 14. gxf3) 13... Nd7 $17 14. Nd2 Rg8 (14... Rc8 $17 15. Bd3 Qxg2) 15. Qe4 $11 Qxe4+ 16. Nxe4 Rc8 17. O-O-O h4 18. g3 Bh6+ (18... b5 $11) 19. Kb1 $16 {aiming for Nd6+.} Ke7 20. Bg2 b6 21. c3 Nc5 22. cxd4 Nxe4 23. Bxe4 a5 24. Rhe1 Rgd8 25. Bc2 Rc4 26. dxe5 Rxd1+ 27. Rxd1 fxe5 $14 {[%mdl 4096] Endgame KRB-KRB} 28. f6+ {[%mdl 64] [#] Decoy} Kxf6 29. Rd6+ Kg7 30. Rxb6 Bd2 31. Rb5 hxg3 32. hxg3 e4 33. Rb7 e3 34. fxe3 Rg4 35. e4 Rxg3 36. Bb3 Rf3 37. e5 {Threatens to win with e6.} Kf8 38. Kc2 Be3 39. Bd5 Rf2+ 40. Kc3 Bd2+ 41. Kc4 Bc1 42. b4 axb4 43. axb4 Bb2 44. e6 fxe6 45. Bxe6 Re2 46. Kd5 Rd2+ 47. Kc6 Be5 48. Bd5 Ke8 49. Be4 Rd6+ 50. Kc5 Kd8 51. Rh7 Rd7 52. Rh5 Bd4+ 53. Kc4 Be3 54. Bd5 Kc7 55. Re5 Bb6 56. Kb5 Bd4 57. Rg5 (57. Rf5 {with more complications.} Rd6 58. Bg2 Be3 59. Re5 Bd2 60. Re7+) 57... Rd6 58. Rh5 Be3 59. Kc4 Rh6 60. Re5 Rh4+ 61. Kb5 Bd2 62. Bc4 Bc3 63. Rc5+ Kd6 64. Rc6+ Ke5 65. Ka4 Bd2 {The position is equal.} 66. b5 Rh6 67. Rc5+ Kf4 68. Bd5 Be3 69. Rc4+ Kf5 70. Ka5 Bd2+ 71. Ka4 Be3 72. Re4 Bb6 73. Re8 Rd6 74. Bc6 Rd4+ 75. Kb3 Rd8 76. Re7 Rd3+ 77. Kc2 Rd6 78. Rb7 Bg1 79. Kc3 Ke5 80. Kb4 Rd2 81. Re7+ Kf6 82. Re8 Rb2+ 83. Kc3 Rb1 84. Re2 (84. Kc2 {is more complex.} Rb4 85. Bd7 Bd4 86. Kd3 Bb2 87. Re6+) 84... Bb6 85. Bd7 Re1 86. Rh2 Ke7 87. Bf5 Re5 88. Bd3 Kd6 89. Kc4 Rc5+ 90. Kb4 Re5 91. Rh6+ Re6 92. Rh8 Rf6 93. Be4 (93. Bb1 {keeps more tension.} Rf4+ 94. Kb3 Kc7 95. Rh6 Rd4 96. Rh7+) 93... Ke5 94. Bc6 Rf4+ 95. Kb3 Kd6 (95... Ba5 {looks sharper.} 96. Rh5+ Kd6 97. Rh6+ Kc5 98. Rh7 Rb4+) 96. Rh6+ (96. Bh1 {is more complex.} Rd4 97. Rh7 Kc5 98. Rh5+ Kd6 99. Bg2) 96... Ke5 97. Bg2 Rf6 98. Rh1 Rg6 99. Re1+ Kd6 100. Rd1+ Ke5 101. Ba8 Rg3+ 102. Kc2 Rg8 103. Bf3 Rd8 104. Rh1 Rf8 105. Rh3 Rf6 106. Kb3 Kd6 107. Be4 Ke5 108. Bd3 Kd4 109. Bc4 Ke5 110. Kb4 Rf5 111. Rd3 Rf6 112. Rd5+ Ke4 113. Rh5 Rd6 114. Rh8 Kd4 115. Rc8 Ke5 116. Rc6 {Weighted Error Value: White=0.08/Black=0.09} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "11.7"]
[White "Vidit, Santosh Gujrathi"]
[Black "Carlsen, Magnus"]
[Result "0-1"]
[ECO "A84"]
[WhiteElo "2726"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,84,45,31,45,34,49,41,43,29,32,21,21,18,21,19,20,17,46,47,44,37,107,113,141,15,15,15,15,15,15,0,0,-7,-2,-130,-134,-138,-137,-229,-122,-105,-118,-116,-120,-152,-169,-163,-116,-239,-45,-41,-33,-454,-454,-480,-455,-427,-438,-768,-733,-640,-633]} 1. d4 d5 2. c4 e6 3. Nf3 c6 4. e3 f5 5. Bd3 Nf6 6. O-O Bd6 7. b3 Qe7 8. Bb2 O-O 9. Qc1 b6 10. Ba3 Bb7 11. Bxd6 Qxd6 12. Qa3 Qxa3 13. Nxa3 g6 {A84: Dutch Defence: 2 c4 Miscellaneous.} 14. Rfc1 Nbd7 {[#]} 15. cxd5 $146 ({Predecessor:} 15. Nb1 Kf7 16. Nc3 Ke7 17. b4 a5 18. a3 axb4 19. axb4 Rxa1 20. Rxa1 Ra8 21. Rxa8 Bxa8 {½-½ (44) Santos Latasa,J (2541)-Gonzalez de la Torre,S (2440) San Sebastian 2016}) 15... exd5 {White is slightly better.} 16. Nc2 {[%cal Ba3c2,Bc2e1,Be1d3][%mdl 32]} a5 17. a4 Ne4 18. g3 Kg7 19. Nce1 Rfc8 20. Rc2 c5 21. Bb5 Nf8 22. Rac1 Kf6 ({Black should try} 22... cxd4 $1 $14 23. Rc7+ (23. exd4 Rxc2 24. Rxc2 Rc8 $11) 23... Kf6) 23. Nd3 $1 $16 cxd4 24. Nxd4 (24. Bc6 $1 $16 {[%cal Rc6b7]} Rab8 25. Bxb7 (25. exd4 Ne6 $11) 25... Rxc2 26. Rxc2 Rxb7 27. Rc6+ (27. exd4 Ne6 $11) (27. Nxd4 Nd7 $16) 27... Kf7 28. Nxd4) 24... Rxc2 $1 $11 25. Rxc2 {Strongly threatening Bc6.} Rc8 26. Rxc8 Bxc8 27. Bc6 Nc3 28. b4 Ne6 29. Nb3 (29. bxa5 $11 {remains equal.} Nxd4 30. exd4 Ne2+ 31. Kf1 Nxd4 32. Bxd5 bxa5 33. Ke1) 29... Nd8 $17 30. Ba8 Ba6 $1 {[%cal Ra6d3]} 31. Nf4 (31. Nbc1 $17) 31... axb4 ({Better is} 31... Bc4 $19 32. bxa5 Bxb3 33. axb6 Nxa4 34. Nxd5+ Bxd5 35. Bxd5 Nxb6) 32. Nxd5+ Nxd5 33. Bxd5 $19 {[%mdl 4096] Endgame KBN-KBN} Ne6 34. a5 bxa5 35. Nxa5 {[#]} Nc5 $1 36. f4 {[#]} (36. f3 $17) 36... Bb5 $2 (36... Bc8 $1 $19 {Hoping for ...Be6.} 37. Kf2 Be6 38. Bxe6 Kxe6) 37. Kf2 $15 Bd7 38. e4 $2 {[%mdl 8192]} (38. Ke2 $15) 38... fxe4 $19 {Black is clearly winning.} 39. Ke3 Be6 40. Bxe6 Kxe6 ({Inferior is} 40... Nxe6 41. Kxe4 g5 42. Nb3 $11) 41. Kd4 {[#]} (41. Nc4 $142 b3 42. Kd2) 41... b3 $1 42. Nc4 Na4 {Weighted Error Value: White=0.62/Black=0.16} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "11.8"]
[White "Radjabov, Teimour"]
[Black "Ding, Liren"]
[Result "1/2-1/2"]
[ECO "E15"]
[WhiteElo "2765"]
[BlackElo "2791"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,79,0,0,0,0,0,0,0,0,0,0,0,3,-4,-6,-14,0,0,0,0,0,0,0,0,0,0,0,0,0,-6,-14,-9,-7,-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]} 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Ba6 5. Qa4 Bb7 6. Bg2 c5 7. O-O cxd4 8. Nxd4 Bxg2 9. Kxg2 Qc7 10. Nc3 Be7 11. Rd1 O-O 12. Bf4 Qb7+ {The position is equal.} 13. Kg1 {E15: Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations.} a6 14. Rac1 Rc8 15. Nf3 Nc6 16. Bg5 Rc7 {[#]} 17. Qc2 $146 ({Predecessor:} 17. Bf4) 17... h6 18. Bf4 Rcc8 19. Ne4 d5 20. Nxf6+ Bxf6 21. cxd5 Nb4 22. Qb3 Nxd5 23. Be5 Be7 24. Bd4 b5 25. Ne5 Bf6 26. Nf3 Bxd4 27. Nxd4 Rxc1 28. Rxc1 Rc8 29. Rc2 Nb6 30. Qf3 Nd5 31. Qe4 Qd7 32. e3 Rxc2 33. Qxc2 Nb4 34. Qb3 Nc6 35. Nxc6 Qxc6 36. Qb4 Qc1+ 37. Kg2 Qc6+ 38. Kg1 Qc1+ 39. Kg2 Qc6+ 40. Kg1 {An uneventful encounter.  Weighted Error Value: White=0.00/Black=0.01} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "12.1"]
[White "Dubov, Daniil"]
[Black "Ding, Liren"]
[Result "1-0"]
[ECO "E04"]
[WhiteElo "2710"]
[BlackElo "2791"]
[Annotator "TA"]
[PlyCount "35"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,35,0,-29,0,4,4,-4,26,0,0,0,5,0,0,0,54,48,50,45,226,218,214,233,216,204,496,489]} 1. d4 Nf6 2. Nf3 d5 3. c4 e6 4. g3 Bb4+ 5. Nbd2 (5. Bd2 Be7 6. Bg2 O-O 7. Qc2 c6 8. h4 Nbd7 9. Nc3 dxc4 10. Rd1 b5 11. Ne5 Nxe5 12. dxe5 Nd5 13. Ne4 f5 14. exf6 gxf6 15. b3 cxb3 16. axb3 Qb6 17. O-O a5 {1-0 (47) Dubov,D (2699)-Ding,L (2791) chess24.com INT 2020}) 5... dxc4 6. Bg2 a5 {E04: Open Catalan: 5 Nf3.} (6... b5 {looks sharper.} 7. Ne5 Nd5 8. a3 Be7 9. O-O O-O) 7. a3 $1 {[%cal Ba2a3,Ba3a4,Ba4b5][%mdl 4] is more profitable than 7.0-0 at the moment.} Bxd2+ 8. Bxd2 O-O {The position is equal.} 9. Qc2 b5 10. a4 c6 11. h4 {[#]} Nbd7 $146 ({Predecessor:} 11... Na6 12. Ne5 Nb4 13. Bxb4 axb4 14. Nxc6 Qd6 15. Ne7+ Qxe7 16. Bxa8 b3 17. Qc3 Qa7 {½-½ (31) Xu,X (2581)-Wei,Y (2734) Hangzhou 2018}) 12. h5 h6 (12... Bb7 $11) 13. g4 $14 Nxg4 14. axb5 Bb7 $2 {[#] Loses the game.} (14... Qb6 $14) 15. Nh2 $1 $18 Nxf2 16. Kxf2 Qh4+ 17. Kf1 Qf6+ $2 (17... Rfc8 18. Nf3 Qe7 19. bxc6 (19. Rxa5 Rxa5 20. Bxa5 cxb5 $14) (19. Qxc4 cxb5 20. Qxb5 Nf6 $18) 19... Bxc6) 18. Bf3 {Weighted Error Value: White=0.04/Black=0.59} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "12.2"]
[White "Carlsen, Magnus"]
[Black "Radjabov, Teimour"]
[Result "1/2-1/2"]
[ECO "E58"]
[WhiteElo "2862"]
[BlackElo "2765"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,112,0,0,0,0,0,0,0,0,0,0,0,0,0,-13,-43,-42,-118,-62,-63,-43,-41,-40,-41,0,0,0,0,0,0,0,0,0,-3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,10,-6,-5,-5,-4,-3,-3,-8,-8,-8,0,-8,0,0,0,0,0,-4,-2,-3,0,-8,-8,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,-7,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. e3 d5 6. a3 Bxc3+ 7. bxc3 Nc6 8. Bd3 O-O 9. O-O b6 10. cxd5 exd5 11. Nd2 {E58: Nimzo-Indian: Rubinstein: Main Line: 7...Nc6 8 a3 Bxc3.} Re8 12. Re1 Bg4 13. f3 Bh5 {[#]} 14. Bb2 $146 ({Predecessor:} 14. Nf1 Bg6 15. Ra2 Qc7 16. Ng3 Rac8 17. Rd2 Bxd3 18. Rxd3 h5 19. e4 cxd4 20. cxd4 {1-0 (39) Veisi,B (2203)-Rastbod,A (2296) Hamedan 2017}) 14... Bg6 15. Bb5 Re6 16. c4 {And now e4! would win.} (16. e4 {seems wilder.} cxd4 17. cxd4 dxe4 18. Nxe4 Nd5 19. Qa4) 16... cxd4 17. Bxc6 (17. exd4 $5 {[%cal Re1e6]} Na5 18. Rxe6 fxe6 19. cxd5 $11) 17... Rxc6 18. cxd5 {[#]} (18. Qa4 $1 $15 Rac8 19. cxd5) 18... Nxd5 ({Black should play} 18... Bc2 $1 $17 {[%cal Rc2d1][%mdl 512]} 19. dxc6 Bxd1 20. Raxd1 Qd5) 19. Bxd4 $15 Nc3 20. Qb3 Rac8 21. Nf1 Qd5 (21... h5 {looks sharper.} 22. Kh1 Bd3 23. Rac1 Qg5 24. e4 Qb5) 22. Qxd5 {The position is equal.} Nxd5 23. e4 Nf4 24. Ne3 f6 25. Red1 Rd8 {Hoping for ...Rxd4!} 26. Bb2 Rcd6 27. Rxd6 Rxd6 28. Rd1 Rxd1+ 29. Nxd1 $11 {[%mdl 4096] Endgame KBN-KBN} Kf7 30. Ne3 Ke6 31. g3 Nd3 32. Bc3 Kd6 33. Kf1 Kc6 34. Ke2 Nc5 35. g4 a5 36. e5 fxe5 37. Bxe5 Bd3+ 38. Kd2 g6 39. Kc3 Be2 40. f4 b5 41. f5 gxf5 42. gxf5 b4+ 43. axb4 axb4+ 44. Kd2 Bh5 45. Bb2 Kd6 46. f6 Ke6 47. Nc2 Ne4+ 48. Ke3 Nxf6 49. Bxf6 b3 50. Nd4+ Kxf6 51. Nxb3 {KB-KN} Bf7 52. Nd4 Ke5 53. Nf3+ Kf5 54. Nd4+ Ke5 55. Nf3+ Kf5 56. Nd4+ Ke5 {Weighted Error Value: White=0.04/Black=0.04} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "12.3"]
[White "Vachier-Lagrave, Maxime"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1/2-1/2"]
[ECO "C77"]
[WhiteElo "2784"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,98,18,18,20,0,10,0,0,0,0,0,0,0,0,-9,0,-4,0,-11,-12,-22,-12,-29,0,-4,0,0,19,12,8,18,29,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,14,47,14,13,12,11,8,8,8,8,8,8,8,8,0,0,0,0,0,0,0,0,0,8,8,8,8,8,8,8,8,8,0,0,0,8,0,8,0,8]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. Nc3 b5 6. Bb3 Bc5 7. d3 h6 {C77: Ruy Lopez: 3...a6 4 Ba4 Nf6, unusual lines.} 8. a4 Rb8 9. axb5 axb5 10. Nd5 d6 11. c3 Nxd5 12. Bxd5 Ne7 13. Bb3 Ng6 14. O-O O-O 15. d4 Bb6 16. Be3 Qf6 17. h3 Bb7 18. Bc2 Rfe8 19. Re1 {[#]} Re7 $146 ({Predecessor:} 19... Nf4 20. dxe5 dxe5 21. Bxf4 Qxf4 22. Qd7 Qf6 23. Rad1 Red8 24. Qg4 Rd6 25. Rxd6 cxd6 {1-0 (58) Safarli,E (2681)-Brown,M (2524) chess.com INT 2019}) 20. Qd2 exd4 21. Bxd4 Bxd4 22. cxd4 Rbe8 {[%cal Rb7e4]} 23. d5 c6 24. dxc6 Bxc6 25. Ra6 Bxe4 26. Bxe4 Rxe4 27. Rxe4 Rxe4 28. Rxd6 Qf4 29. Qd3 Rc4 {[#] ...Rc1+ is the strong threat.} 30. g3 Qe4 (30... Qc1+ {keeps more tension.} 31. Kg2 Qxb2 32. Rd8+ Kh7 33. Qf5 Qf6) 31. Rd8+ (31. Qxe4 {seems wilder.} Rxe4 32. Rd4 Re7 33. Rd5 b4 34. Rb5) 31... Kh7 {The position is equal.} 32. Qxe4 Rxe4 $11 {[%mdl 4096] Endgame KRN-KRN} 33. Rd4 Re2 34. Rb4 Ne5 {[#]} 35. Kf1 $1 Rxf2+ {[%mdl 64] Decoy} 36. Kxf2 Nd3+ {[%mdl 64] Double Attack} 37. Ke2 Nxb4 {KN-KN} 38. Nd4 g5 39. Nxb5 f5 40. Nc3 Kg6 41. Ke3 f4+ 42. gxf4 gxf4+ 43. Ke4 Kg5 44. Ne2 Kh4 45. Nxf4 Kg3 46. Nd3 Nc2 47. Nf4 Nb4 48. Kf5 Nc2 49. Ke4 Nb4 {A rather calm draw.  Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "12.4"]
[White "So, Wesley"]
[Black "Nakamura, Hikaru"]
[Result "1/2-1/2"]
[ECO "E32"]
[WhiteElo "2770"]
[BlackElo "2736"]
[Annotator "TA"]
[PlyCount "54"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,54,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qc2 O-O 5. e4 d5 6. e5 Ne4 7. Bd3 c5 {The position is equal.} 8. Nf3 {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. Bxe4 dxe4 16. e6 gxf4 17. exd7 Bxd7 18. Qxe4 {[%mdl 64] [#] Double Attack} fxg3 19. fxg3 b6 20. Nf5 {Strongly threatening Ne7+.} Rae8 21. Qd5 Bxf5 ({Avoid the trap} 21... Re2 $2 {[#]} 22. Ne7+ $1 {[%mdl 512]} Rxe7 23. Qxh5 $18) 22. Rxf5 Qe2 23. Raf1 {And now Rg5+ would win.} Qe3+ 24. R1f2 {[%cal Rf5f7]} Qe1+ {[#]} 25. Rf1 $146 ({Predecessor:} 25. Kg2 Qe4+ 26. Qxe4 Rxe4 27. Rg5+ Kh8 28. Rgf5 Kg8 29. Rg5+ Kh8 30. Rgf5 Kg8 {½-½ (30) So,W (2770)-Nakamura,H (2736) Lichess.org INT 2020}) 25... Qe3+ 26. R1f2 {[%cal Rf5f7]} Qe1+ 27. Rf1 Qe3+ {Not much happened in this game.  Weighted Error Value: White=0.00/Black=0.00} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "12.5"]
[White "Aronian, Levon"]
[Black "Nepomniachtchi, Ian"]
[Result "1-0"]
[ECO "D80"]
[WhiteElo "2781"]
[BlackElo "2789"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,53,14,12,25,0,2,1,10,10,10,7,19,22,15,13,31,25,23,13,27,24,28,26,59,72,79,74,97,100,97,97,110,102,115,102,106,102,227,192,357,345,333,338,305,335]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bg5 Ne4 5. Bf4 Nxc3 6. bxc3 c5 {D80: Grünfeld: Unusual White 4th moves and 4 Bg5.} 7. cxd5 Qxd5 8. e3 cxd4 {The position is equal.} 9. Qxd4 Qxd4 10. cxd4 Nc6 11. Nf3 Bg7 {[#]} 12. Bd3 $146 ({Predecessor:} 12. Bb5 Bd7 13. O-O O-O 14. Rab1 Bf5 15. Rb2 Na5 16. Bc7 b6 17. Ba6 Bc8 18. Bxc8 Rfxc8 19. Rc1 {½-½ (30) Maric,A (2457)-Zhukova,N (2441) Leon 2001}) 12... O-O 13. Be4 Bd7 14. Kd2 Rac8 15. Rhc1 b6 16. Rc3 Na5 17. Rac1 $36 {[%mdl 2048] Black is under strong pressure.} Rxc3 18. Rxc3 Rc8 19. Rxc8+ Bxc8 20. Bb8 Nc4+ 21. Kc3 Nd6 22. Bc6 a6 23. a4 Bf5 {[#] This move loses the game for Black.} (23... f5 $16) 24. Nd2 $1 $18 Bf8 $2 (24... Kf8 25. Bxd6 exd6) 25. e4 Bc8 26. Bxd6 exd6 27. Nc4 {Weighted Error Value: White=0.03/Black=0.24} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "12.6"]
[White "Bluebaum, Matthias"]
[Black "Giri, Anish"]
[Result "0-1"]
[ECO "D02"]
[WhiteElo "2670"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "98"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,98,0,43,41,41,31,31,25,31,39,49,1,14,0,0,0,0,0,0,0,11,11,53,46,81,-8,-1,-8,0,-108,0,-91,-121,-118,-128,-137,-49,-176,-133,-129,-124,-133,-75,-148,-148,-197,-130,-130,-143,-133,-139,-187,-188,-260,-243,-312,-317,-295,-281,-271,-258,-264,-260,-265,-236,-247,0,-250,-246,-262,-254,-294,-293,-360,-340,-437,-458,-445,-354,-691,-691,-681,-592,-12831,-12831,-12831,-12832,-12834,-12835,-12835,-12835]} 1. d4 Nf6 2. Nf3 d5 3. Bf4 Bf5 4. c4 e6 5. Qb3 dxc4 6. Qxb7 {[#] D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Be4 $146 ({Predecessor:} 6... Nbd7 7. Bxc7 Qc8 8. Qxc8+ Rxc8 9. Ba5 Be7 10. Nbd2 Be4 11. Rc1 Bd5 12. h3 O-O {½-½ (44) Kadukowski,P (1813)-Malek,P Poland 2011}) 7. Qxc7 Bb4+ 8. Nbd2 {Qxd8+ is the strong threat.White is slightly better.} Qxc7 9. Bxc7 Ke7 10. a3 {[%cal Ba2a3,Ba3b4,Bb4b5][%mdl 32]} c3 $1 {[%cal Rc3b2]} 11. axb4 cxb2 12. Ra2 Rc8 13. Rxb2 Rxc7 $40 {[%cal Rc7c1][%mdl 128] Black attacks.} 14. Nb3 Nc6 {[%cal Bb8c6,Bc6b4,Bb4d3][%mdl 32]} 15. b5 Nb4 (15... a5 $5 {[%cal Ra5a4]}) 16. e3 Nd7 17. Be2 (17. Kd2 $16) 17... Nd3+ $11 18. Bxd3 Bxd3 19. Na5 (19. Kd2 $11 Bxb5 20. Ra1) 19... Bxb5 20. Rxb5 (20. Kd2 $11 {keeps the balance.} Rb8 21. Rc1 Rxc1 22. Kxc1) 20... Rc1+ $17 21. Ke2 Rxh1 22. Rb7 {[#]} f6 (22... Ke8 $1 $17 {Threatens to win with ...Ra1.} 23. Nc4 f6 24. Nd6+ Ke7) 23. Ne1 (23. Nd2 $1 $15) 23... Kd8 ({Don't do} 23... Rxh2 24. Nd3 $17) 24. h3 Kc8 25. Rb2 Nb6 (25... g5 $142 26. Nd3 Kd8) 26. Rc2+ (26. Nd3 $142) 26... Kd7 27. Nb7 Rc8 ({Black should try} 27... Nd5 $19 28. Nc5+ Kd6) 28. Nc5+ {[#]} Ke7 $1 29. Ra2 Rc7 30. Ra6 e5 31. f3 (31. Ne4 {keeps fighting.}) 31... Nd5 32. Ra3 Kf7 {Hoping for ...exd4.} 33. Ned3 exd4 34. exd4 Rb1 35. Kf2 g5 36. Kg3 Ne3 37. Kf2 Nd5 38. Kg3 Rd1 39. h4 h6 40. hxg5 hxg5 41. Ra2 Re7 42. Kf2 Nc3 43. Rc2 {[#]} Na4 {[%mdl 512]} 44. g4 $2 (44. Ra2 Nxc5 45. Nxc5) (44. Nxa4 Rxd3) 44... Nxc5 $19 {Black is clearly winning.} 45. Nxc5 Rxd4 46. Ne4 Rdxe4 47. fxe4 Rxe4 48. Kf3 Rf4+ 49. Kg3 a5 {Weighted Error Value: White=0.51/Black=0.23} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "12.7"]
[White "Shankland, Sam"]
[Black "Grischuk, Alexander"]
[Result "1/2-1/2"]
[ECO "B33"]
[WhiteElo "2691"]
[BlackElo "2777"]
[Annotator "TA"]
[PlyCount "145"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,145,19,11,20,15,36,7,47,44,43,44,112,114,131,105,109,68,128,127,122,120,112,92,88,97,100,103,114,102,108,114,114,104,94,123,138,139,127,78,164,125,124,143,131,18,127,94,74,0,127,134,111,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Nd5 Nxd5 8. exd5 Ne7 9. c4 Ng6 10. Qa4 Bd7 11. Qb4 Qb8 {11...Bf5 is more advanced technology. B33: Sicilian: Pelikan and Sveshnikov Variations.} 12. h4 h5 13. Be2 Be7 (13... a6 $5 {[%cal Ra6b5]} 14. Nc3 f5 $14) 14. g3 {[#]} e4 $146 ({Predecessor:} 14... f5 15. Bg5 a6 16. Nc3 e4 17. f4 exf3 18. Bxf3 Ne5 19. Be2 Bxg5 20. hxg5 g6 {1-0 (35) Gavilan Diaz,M (2334)-Gonzalez Gonzalez,A (2183) Marbella 2018}) 15. Bg5 f5 (15... a6 $14 16. Nd4 f6) 16. O-O-O $16 Bxb5 17. Qxb5+ Kf7 18. Kb1 (18. Qd7 $6 Qc8 $11) 18... b6 {[#]} (18... Qc7 $14) 19. Bxe7 $1 ({Of course not} 19. Qd7 $6 Qc8 $11) 19... Kxe7 20. f3 Qe8 21. fxe4 Qxb5 22. cxb5 f4 23. Rhg1 Raf8 {and if ...f3 works, Black does fine.} 24. gxf4 Nxf4 25. Bf3 ({Don't play} 25. Rxg7+ $6 Kf6 $11) 25... Rf7 26. e5 dxe5 27. d6+ Kf6 28. Bc6 Rd8 29. d7 Re7 (29... Ne6 $16 {was worth a try.}) 30. Kc2 g6 31. Rg3 Re6 32. Ra3 (32. Rd2 $16) 32... a5 (32... Ne2 $1 $11 {remains equal.}) 33. b4 axb4 {[#]} 34. Ra6 ({Better is} 34. Re3 $1 $16) 34... Ke7 (34... Ne2 $1 $11) 35. Rxb6 e4 36. Ra6 (36. Rd4 $16) 36... e3 $11 {The position is equal.} 37. Ra4 e2 38. Re1 Rxd7 39. Bxd7 Kxd7 40. Rxb4 {[%mdl 4096] Endgame KRR-KRN} Ng2 41. Rd4+ Kc7 42. Kd2 Nxe1 43. Kxe1 {KR-KR} Kb6 44. Rb4 Re5 45. a4 Ka5 46. Rb2 Kxa4 47. b6 Re8 $1 48. b7 Rb8 49. Kxe2 Ka5 50. Ke3 {Hoping for Kd4.} Ka6 51. Kf4 {Kg5 is the strong threat.} Rxb7 52. Ra2+ Kb6 53. Kg5 Kc7 54. Kxg6 Kd7 55. Ra5 ({But not} 55. Kxh5 $6 Ke8 $16) 55... Rb4 56. Rxh5 Ke7 57. Rh7+ Ke6 58. h5 Rg4+ 59. Kh6 Kf6 60. Ra7 Rh4 61. Ra5 Kf7 62. Kh7 (62. Rg5 {is more complex.} Kf6 63. Rg3 Kf5 64. Rg7 Ra4 65. Rg1) 62... Rg4 63. Rf5+ (63. Ra7+ {looks sharper.} Kf6 64. Ra6+ Kg5 65. Ra5+ Kf6 66. Ra8) 63... Ke7 64. Kh6 {aiming for Kh7.} Rg1 65. Rf2 Rg3 66. Kh7 {And now h6 would win.} Rg5 67. h6 {Black must now prevent Rf3.} (67. Rh2 {seems wilder.} Kf7 68. Kh6 Rf5 69. Rg2 Kf8 70. Rg3) 67... Rg1 68. Ra2 Kf7 69. Ra7+ Kf8 70. Rg7 Rf1 71. Rg4 Kf7 72. Rg3 Rf2 73. Rg4 {Weighted Error Value: White=0.14/Black=0.13} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "12.8"]
[White "Dominguez Perez, Leinier"]
[Black "Duda, Jan-Krzysztof"]
[Result "1-0"]
[ECO "C42"]
[WhiteElo "2758"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,55,29,27,13,8,12,18,8,29,23,43,33,33,30,31,17,37,11,8,8,52,45,171,165,242,249,239,227,355,351,494,490,489,482,596,486,944,915,1739,853,786,566]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bf5 7. O-O Be7 8. Re1 O-O 9. Nbd2 {[%cal Rd2e4,Bb1d2,Bd2f1,Bf1e3,Be3f5][%mdl 32] C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} Nd6 $1 10. Nf1 Bxd3 11. Qxd3 {The position is equal.} Nd7 12. Bf4 Re8 {[#]} 13. Qb3 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 13. Re2 Bf8 14. Ne3 c6 15. Rae1 Ne4 16. Ng4 Bd6 17. Bxd6 Nxd6 18. Rxe8+ Nxe8 19. Qa3 Nf8 20. h4 Nd6 21. h5 h6 22. Qe3 Qd7 23. Qf4 Re8 24. Rxe8 {½-½ (24) Adams,M (2736)-Li,C (2735) Geneva 2017}) 13... Nb6 14. Ne3 $36 {[%mdl 2048] White is pushing.} c6 15. a4 a5 16. h4 Ndc4 17. Nf5 Bf8 18. h5 Qd7 {[#] A mistake that costs the game.} ({Better is} 18... Re4 $14 19. Rxe4 dxe4) 19. N3h4 $1 $18 Re6 {[#]} (19... g6 {was necessary.}) 20. Qg3 $1 {Hoping for Nxg7!} Rae8 21. Rxe6 Qxe6 (21... Rxe6 {was called for.} 22. Nxg7 (22. b3 Nd6 $18) 22... Bxg7) 22. b3 Nb2 (22... g6 $142 23. bxc4 Nxc4 24. Nh6+ Bxh6) 23. Rb1 {White is clearly winning.} g6 24. Rxb2 ({Don't take} 24. hxg6 hxg6 25. Rxb2 Qe1+ 26. Kh2 Qe6 $18) 24... Qe1+ 25. Kh2 {[%cal Rh5g6]} Qd1 (25... Qe6 $142 26. c4 Ra8 27. hxg6 fxg6) 26. hxg6 Re1 27. gxf7+ Kxf7 28. Qf3 {Weighted Error Value: White=0.05/Black=0.45} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "13.1"]
[White "Duda, Jan-Krzysztof"]
[Black "Dubov, Daniil"]
[Result "1-0"]
[ECO "D48"]
[WhiteElo "2743"]
[BlackElo "2710"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 22,111,0,0,31,28,36,0,0,0,94,111,112,107,102,105,106,99,94,0,0,0,87,80,76,52,54,53,45,25,100,36,10,-87,0,0,0,0,0,-38,0,0,0,0,453,435,1065,1065,810,360,370,370,362,361,339,325,340,323,550,389,887,887,794,479,664,602,667,0,0,0,0,0,0,0,0,0,976,935,837,671,7546,0,0,0,7634,6679,8306,7056,6130,6127,6079,1469]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bb7 9. O-O a6 10. e4 c5 11. e5 Nd5 12. Ng5 Nxc3 {D48: Semi-Slav: Meran System: 7...b5 8 Bd3 a6.} 13. bxc3 Be7 {[#]} 14. Nxe6 $146 ({Predecessor:} 14. f4 Bxg5 15. fxg5 Nb6 16. Rf2 Na4 17. Qh5 g6 18. Qh6 Qd5 19. Bd2 O-O-O 20. Bf1 {1-0 (46) Kozul,Z (2595)-Gurevich,D (2575) Biel 1993}) 14... fxe6 {The position is equal.} 15. Qh5+ $40 {[%mdl 128] White attacks.} g6 (15... Kf8 $11 {remains equal.} 16. f4 Kg8) 16. Bxg6+ $1 $16 hxg6 17. Qxg6+ (17. Qxh8+ $6 Nf8 $11) 17... Kf8 18. Bh6+ Rxh6 19. Qxh6+ Kg8 20. Qg6+ Kh8 21. Qh6+ Kg8 22. Qxe6+ Kg7 23. Rad1 {[%mdl 1024] White has strong compensation.} Nf8 $1 {[%cal Rf8e6]} 24. Qg4+ Kh8 $1 25. d5 {Threatens to win with d6.} Nh7 (25... Bxd5 $2 26. e6 $18) (25... Qd7 $1 $11 26. Qxd7 Nxd7) 26. d6 (26. Rfe1 $16) 26... Bh4 27. e6 (27. f4 $11) 27... Qf6 ({Black should try} 27... Qg5 $1 $17 {[%cal Rg5g4]} 28. Qxg5 Nxg5) 28. e7 $11 Bc6 29. g3 Rg8 30. Qh5 {Black must now prevent Rfe1.} Qxc3 {[%cal Rh4g3] Strongly threatening ...Bxg3!} 31. Rd5 Bxd5 32. Qxd5 Nf6 {[%mdl 8192] [#]} (32... Bxe7 $11 33. dxe7 Re8) 33. Qxg8+ $3 $18 {[%mdl 576] Remove Defender, Deflection, Promotion} Nxg8 (33... Kxg8 $142 34. d7 {[%mdl 64] Deflection, Decoy, Promotion} Nxd7 35. e8=Q+ {[%mdl 64] Double Attack} Nf8 36. gxh4 Qc4) 34. e8=Q Bf6 35. Qh5+ (35. Rd1 $142) 35... Kg7 36. Rd1 Nh6 37. d7 Nf7 38. Qg4+ Kf8 39. Qe6 c4 $2 (39... Be7 40. Qxa6 Qc2) 40. Rd5 b4 $2 (40... Nd8 41. Qe8+ (41. Qxa6 Qe1+ 42. Kg2 Qe4+ 43. Kf1 Qxd5 $17) 41... Kg7) 41. Rf5 Kg7 42. Kg2 (42. Qxf7+ Kxf7 43. d8=Q Qe1+ 44. Kg2 Qe4+ 45. Kg1 Qb1+ 46. Kg2 Qe4+ 47. Kg1 Qxf5 $17) 42... b3 43. axb3 cxb3 {Threatening ...b2.} 44. Qxa6 $2 (44. Rf4 $18) 44... b2 $11 45. Qb6 Bd8 46. Rxf7+ Kxf7 47. Qxd8 {[%mdl 4096] Endgame White wants to mate with Qe8+. KQ-KQ} Qc6+ 48. f3 {Qe8+ is the strong threat.} b1=Q $4 {[%mdl 8192]} (48... Qc2+ $11 49. Kh3 Qh7+ 50. Kg2 Qc2+ 51. Kh3 Qh7+ 52. Kg2 Qc2+) 49. Qe8+ $1 $18 Kg7 50. Qe5+ Kh7 {[#]} 51. Qh5+ $2 (51. d8=Q $1 $18 {[%cal Rd8e7] Qde7+ would kill now.} Qa2+ 52. Kh3 Qce6+ 53. Qxe6 Qxe6+ 54. Kh4) 51... Kg7 $1 $11 {( -> ...Qcc2+)} 52. Qg4+ Kh6 $2 {[%mdl 8192]} (52... Kh7 $11 53. Qh5+ Kg7 54. Qg5+ (54. d8=Q Qcc2+ 55. Kh3 Qf1+ 56. Kg4 Qfc4+ 57. Kh3 Qf1+ 58. Kg4 Qfc4+ 59. Kh3 Qf1+ $11) 54... Kh7 55. Qh4+ Kg6 56. Qg4+ Kh7 57. Qh5+) 53. Qf4+ $18 {White is clearly winning.} (53. d8=Q {leads to mate.} Qcc2+ 54. Qd2+ Qxd2+ 55. Kh3 Qf1+ 56. Kh4 Qxh2+ 57. Qh3 Qhxh3#) 53... Kh5 54. g4+ Kg6 55. d8=Q {[%cal Rd8g8]} Qcc2+ 56. Qdd2 {Weighted Error Value: White=0.63/Black=0.56} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "13.2"]
[White "Grischuk, Alexander"]
[Black "Dominguez Perez, Leinier"]
[Result "0-1"]
[ECO "C28"]
[WhiteElo "2777"]
[BlackElo "2758"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,76,0,-14,-19,12,19,10,-24,-25,-27,-20,-113,-110,-119,-110,-136,-136,-127,-130,-137,-133,-212,-221,-219,-205,-214,-214,-225,-222,-222,-223,-228,-230,-225,-232,-231,-224,-225,-229,-234,-231,-229,-234,-241,-241,-363,-353,-352,-354,-332,-286,-272,-266,-264,-252,-320,-302,-352,-351,-348,-343,-397,-387,-397,-290,-275,-250,-576,-333]} 1. e4 e5 2. Bc4 Nf6 3. Nc3 Nc6 4. d3 Bc5 5. f4 O-O 6. Nf3 {C28: Vienna Game: 2...Nf6 3 Bc4 Nc6.} exf4 7. Bxf4 d6 8. Na4 {[#]The position is equal.} d5 $1 9. Nxc5 {And now exd5 would win.} dxc4 {[#]} 10. Qd2 $146 ({Reject} 10. dxc4 Qe7 $17) (10. O-O $11 {remains equal.}) ({Predecessor:} 10. O-O Qe7 11. Na4 cxd3 12. cxd3 Bg4 13. h3 Bxf3 14. Qxf3 Qb4 15. b3 Nd4 16. Qf2 {0-1 (34) Valcarcel,V (1856)-Carvalho,G (2198) Florianopolis 2020}) 10... Qe7 $17 {Black keeps a firm grip on the game.} 11. Na4 cxd3 12. cxd3 Nxe4 13. dxe4 Qxe4+ {[%mdl 64] [#] Double Attack} 14. Qe3 Re8 15. Nc3 (15. Kf2 $17 Qc2+ 16. Qd2 Qxa4 17. Rhe1) 15... Qxe3+ $19 16. Bxe3 Rxe3+ 17. Kf2 Rd3 18. Rhd1 Rxd1 19. Rxd1 Be6 20. Nb5 Rc8 21. a3 a6 22. Nc3 Rd8 23. Rc1 Bd5 24. Ne1 Kf8 25. b4 Bc4 26. Nf3 Rd3 27. Ne4 (27. Rc2 $142) 27... Bd5 28. Nc5 Rxa3 29. Nxb7 Bxf3 30. gxf3 {[%mdl 4096] Endgame KRN-KRN} Ne5 {Strongly threatening ...Nd3+.} 31. Rxc7 Rxf3+ 32. Ke2 Rb3 33. Nd6 Rxb4 34. Nf5 {[%cal Rc7c8]} Rb8 35. Ke3 g6 36. Ke4 {If White can now play Nd6 this consolidates a bit.} gxf5+ 37. Kxe5 Ra8 38. Kf6 $2 (38. Rc4) 38... Kg8 {Weighted Error Value: White=0.37/Black=0.06} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "13.3"]
[White "Giri, Anish"]
[Black "Shankland, Sam"]
[Result "1/2-1/2"]
[ECO "D42"]
[WhiteElo "2764"]
[BlackElo "2691"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 21,90,5,1,0,-20,-36,-33,-43,-41,-56,-22,-47,-66,-31,0,0,0,0,0,0,0,0,8,8,9,12,10,10,10,10,10,9,11,11,87,0,0,0,0,0,0,0,0,0,0,0,0,0,37,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. Nf3 c5 2. c4 Nc6 3. Nc3 Nf6 4. e3 e6 5. d4 d5 6. cxd5 Nxd5 7. Bd3 Be7 8. O-O O-O 9. a3 cxd4 10. exd4 Bf6 11. Be4 Nce7 12. h4 {D42: Queen's Gambit Declined: Semi-Tarrasch: 5 cxd5 Nxd5 6 e3 Nc6 7 Bd3 .} Bd7 13. Ng5 g6 {[#]} 14. Nf3 $146 {Black is slightly better.} ({Predecessor:} 14. h5 Bc6 15. Qg4 Bxg5 16. Bxg5 f5 17. Qh4 fxe4 18. Nxd5 Qxd5 19. Bxe7 Rf7 20. hxg6 hxg6 {½-½ (30) Megaranto,S (2528)-Wang,Y (2699) Ashkhabad 2017}) 14... Bc6 {Threatens to win with ...Nxc3.} 15. Re1 Rc8 16. Bh6 Nxc3 17. bxc3 Bxe4 18. Bxf8 Nd5 {And now ...Bxf3 would win.} 19. Bb4 (19. Rxe4 Nxc3 20. Qe1 Nxe4 $17) 19... Bxf3 20. Qxf3 Bxh4 21. a4 a5 22. Bc5 b6 {[#]} 23. c4 $1 Nf6 {[#]} 24. Bxb6 Qxb6 25. Qf4 Rxc4 26. Qxh4 Nd5 (26... Qxd4 27. Qxd4 Rxd4 28. Reb1 $16) 27. Reb1 Qc7 {[#]} ({Much worse is} 27... Rxd4 $6 28. Rxb6 Rxh4 29. Rb8+ Kg7 30. g3 $16) ({Not} 27... Qxd4 $2 28. Qxd4 Rxd4 29. Rb5 $18) (27... Qd6 $1 $11 {keeps the balance.}) 28. Qe4 ({White should play} 28. Qg3 $1 $16) 28... Nc3 $1 $11 {[%cal Rc3e4]} 29. Qa8+ Kg7 30. Rb8 Ne2+ {[%mdl 64] Double Attack} ({Don't blunder} 30... Rxa4 $2 31. Rxa4 Nxa4 32. Rg8+ Kf6 33. Qf3+ Ke7 34. Qa3+ Kf6 35. Qxa4 $18) 31. Kf1 {aiming for Rg8+.} Nf4 32. Rg8+ Kh6 $1 33. Qe4 {Hoping for g3.} Rc1+ 34. Rxc1 Qxc1+ {[%mdl 4096] Endgame KQR-KQN} 35. Qe1 Qc6 {[%csl Gf4][%cal Rc6g2] The position is equal.} 36. f3 Qc4+ 37. Kg1 {Strongly threatening Qd2!} Qxd4+ 38. Kh2 {Qh4+ would kill now.} Qf6 39. Kh1 Qg5 {[%csl Gf4][%cal Rg5g2]} 40. Qg1 {Black should prevent Qh2+.} Nh5 {( -> ...Ng3+)} 41. g4 Qh4+ 42. Qh2 Qe1+ 43. Qg1 {[%cal Rg4g5]} Qh4+ 44. Qh2 Qe1+ 45. Qg1 {[%cal Rg4g5]} Qh4+ {Weighted Error Value: White=0.06/Black=0.05} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "13.4"]
[White "Nepomniachtchi, Ian"]
[Black "Bluebaum, Matthias"]
[Result "0-1"]
[ECO "C11"]
[WhiteElo "2789"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "118"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,118,22,7,31,0,0,-14,-16,-72,-72,-74,-71,-72,-69,-71,-77,-78,-67,-108,-107,-108,-101,-116,-101,-111,-79,-85,-66,-81,-71,-69,-75,-69,-69,-91,-74,-101,-106,-125,-124,-152,-109,-135,-116,-355,-312,-475,-464,-1091,-974,-904,-798,-2198,-1973,-1763,-2148,-2249,-2190,-2035,-2028,-1775,-460,-1727,-1720,-1720,-1416,-1179,-1059,-29975,-29976,-29976,-29977,-29977,-29978,-29978,-29977,-29978,-29979,-29980,-29974,-29989,-29968,-29970,-29971,-29970,-29971,-29970,-29972,-29970,-29970,-29954,-12492,-5273,-2526,-2250,-2139,-29984,-29985,-29987,-29984,-29987,-29988,-29988,-29989,-29989,-29990]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6. Nf3 Nc6 7. Be3 a6 8. a3 Qb6 {C11: French: Classical System: 4 e5 and 4 Bg5 dxe4.} 9. Na4 Qa5+ 10. c3 c4 $1 {The position is equal.} 11. Be2 {[#]} (11. b4 $11 cxb3 12. Qxb3) 11... b5 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 11... Be7 12. O-O O-O 13. b4 cxb3 14. Qxb3 Qc7 15. Bd3 f5 16. exf6 Nxf6 17. Nb6 Rb8 {1-0 (45) Nepomniachtchi,I (2751)-Morozevich,A (2665) Moscow 2018}) 12. Nc5 Nxd4 {[%mdl 64] Pin} 13. Nxd7 Nxf3+ 14. Bxf3 Bxd7 15. f5 {[#]} Qc7 $1 16. Bd4 Bc5 17. fxe6 fxe6 18. Bh5+ g6 {Hoping for ...Bxd4.} 19. Bg4 Bxd4 20. Qxd4 O-O 21. Kd2 Rf7 22. Raf1 Raf8 $36 {[%mdl 2048] Black has strong initiative.} 23. Rxf7 Rxf7 24. h4 Qd8 25. Kc2 a5 26. Kb1 Qb8 27. g3 b4 28. cxb4 axb4 29. a4 $2 (29. axb4 $17 Qxb4 30. h5) 29... h5 $19 30. Bh3 (30. Bd1 {was forced.} b3 31. g4 hxg4 32. Rg1) 30... Qa8 31. g4 (31. Rf1 $142 Rxf1+ 32. Bxf1 Qxa4 33. Be2) 31... Qxa4 32. gxh5 b3 33. Rg1 Rf3 34. Rxg6+ Kh7 35. Rg7+ Kxg7 36. Qg4+ Kh8 37. Qxf3 Qa2+ 38. Kc1 {Strongly threatening Qf6+.} Qa1+ 39. Kd2 Qxb2+ {[%mdl 64] Double Attack} 40. Ke1 Qxe5+ 41. Kf2 b2 42. Qf8+ Kh7 43. Qe7+ Qg7 44. Qb4 Qd4+ 45. Kg2 Qe4+ 46. Kh2 Qe5+ 47. Kg2 Qe2+ 48. Kg3 Qd3+ 49. Kh2 Qc2+ 50. Bg2 b1=Q 51. Qe7+ Kg8 52. Qd8+ {[#]} Kf7 $1 53. Qxd7+ Kf6 {( -> ...Qb8+)} 54. Qd8+ Ke5 55. h6 Qh7 {Black mates.} 56. Qf8 Qbb7 57. Kg3 Qbf7 58. Qb8+ Qc7 59. Qf8 Kd4+ {White did not feel at home in the position after the opening. Accuracy: White = 54%, Black = 92%.} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "13.5"]
[White "Nakamura, Hikaru"]
[Black "Aronian, Levon"]
[Result "1/2-1/2"]
[ECO "C28"]
[WhiteElo "2736"]
[BlackElo "2781"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,80,-22,-27,-28,-31,0,-22,-16,-35,-26,-22,-27,-14,-8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,18,20,60,52,57,0,-10,-92,-83,-67,-84,-85,-81,-70,-51,-95,-80,-91,-87,-106,-80,-83,-87,-78,-72,-76,-76,-68,0,0,0,-85,0,0,0]} 1. e4 e5 2. Bc4 Nf6 3. d3 Nc6 4. Nc3 Na5 5. Nf3 Nxc4 6. dxc4 Bb4 7. Qd3 d6 {C28: Vienna Game: 2...Nf6 3 Bc4 Nc6.} 8. Bd2 Bg4 {[#]} 9. Ng1 $146 ({Predecessor:} 9. O-O-O Qe7 10. h3 Bh5 11. g4 Bg6 12. Rhe1 Bxc3 13. Bxc3 O-O-O 14. Qe3 Kb8 15. Nd2 {½-½ (65) Reitinger,P (2114)-Plesek,J (2150) Czechia 2010}) 9... O-O 10. f3 Be6 11. a3 Bxc3 12. Qxc3 Nd7 13. Ne2 Qh4+ 14. Ng3 f5 15. exf5 Rxf5 16. O-O-O Rf7 17. b3 a5 18. a4 b6 19. Be3 Raf8 20. Ne4 h6 21. Qd2 Nf6 22. Nc3 Rd7 23. Qe2 Rfd8 24. Kb2 d5 25. Bf2 Qh5 26. g4 (26. cxd5 $14 Nxd5 27. Bg3) 26... Nxg4 27. fxg4 (27. Rxd5 $11 {keeps the balance.} Nxf2 28. Rxd7 Rxd7 29. Qxf2) 27... Bxg4 $17 28. Qe1 {[%cal Rd1d5]} Bxd1 29. Qxd1 Qxd1 30. Rxd1 {[%cal Rc3d5]} dxc4 31. Re1 cxb3 32. Kxb3 Re8 33. Bg3 e4 34. Rxe4 Rxe4 35. Nxe4 Rd4 36. Nf2 Rb4+ 37. Ka3 Rc4 38. Kb3 Rb4+ 39. Ka3 $1 {[#]} Rc4 (39... c6 $1 $17 40. Nd1 Re4) 40. Kb3 $11 Rb4+ {Weighted Error Value: White=0.09/Black=0.10} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "13.6"]
[White "Vidit, Santosh Gujrathi"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "E51"]
[WhiteElo "2726"]
[BlackElo "2770"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,81,0,0,0,4,-4,2,4,15,0,11,0,-8,-21,0,0,0,0,0,0,0,-7,0,0,-4,-28,-12,-18,-7,-18,-16,-17,-17,-17,-17,-16,-18,-17,-17,-29,-28,-32,-14,-31,0,-17,0,0,0,-157,-157,-157,-157,-157,-157,-157,-157,-157,0,-157,-157,-157,-2,-33,-39,-54,-54,-62,-68,-68]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Rc1 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} Bb7 9. Bd3 Be7 $1 {[%mdl 4] is now more promising than 9...a6.} 10. O-O {The position is equal.} c5 11. Ne5 Nc6 12. Ne2 Rc8 {[#]} 13. Bc3 $146 (13. Ng3 {looks sharper.} g6 14. b3 Bd6 15. Bc3 Nb4 16. Bxb4 cxb4 17. Rxc8 Qxc8 18. Qa1) ({Predecessor:} 13. Ng3 cxd4 14. Nxc6 Rxc6 15. exd4 Rxc1 16. Bxc1 Ne4 17. Qa4 Qc7 18. Be3 Bd6 19. Rc1 {1-0 (43) Fedoseev,V (2664)-Ganguly,S (2658) Khanty-Mansiysk 2019}) 13... Ne4 (13... Bd6 {keeps more tension.} 14. f4 Rc7 15. Qe1 Ne4 16. Bxe4 dxe4 17. Rd1 cxd4 18. Nxc6 Rxc6 19. Nxd4 Rc5) 14. Nxc6 Bxc6 15. Bxe4 dxe4 16. dxc5 Qxd1 17. Rfxd1 Bxc5 18. Nd4 Ba4 19. Re1 Bd7 20. h3 f6 21. Rcd1 Kf7 22. Nb3 Ba4 23. Rd2 Bxb3 24. axb3 Rfd8 25. Rxd8 Rxd8 $11 {[%mdl 4096] Endgame KRB-KRB} 26. Ra1 a5 27. Kf1 f5 28. Ke2 g5 29. Ra4 Ke6 30. g4 Rc8 31. b4 $2 ({White should play} 31. Kf1 $11) 31... Bxb4 $17 32. Bxb4 {[#] Strongly threatening Bc3. KRB-KR} Rc4 {[%mdl 64] Pin} 33. b3 Rxb4 34. Rxb4 axb4 {KP-KP} 35. Kf1 h5 $2 (35... Kf6 $17 36. Kg2 Kg6) 36. Kg2 $2 ({White must play} 36. gxh5 $11 Kf6 37. Kg2) 36... fxg4 37. hxg4 {[#]} hxg4 ({Black should try} 37... h4 $1 $17 38. Kh2 Ke5) 38. Kh2 $11 Kf6 {Black is slightly better.} 39. Kg2 $1 Kg6 40. Kh2 $1 Kh6 $1 41. Kg2 $1 {Weighted Error Value: White=0.18/Black=0.17} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "13.7"]
[White "Radjabov, Teimour"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1/2-1/2"]
[ECO "A30"]
[WhiteElo "2765"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "129"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,129,32,20,14,32,21,18,11,19,22,19,25,10,10,25,18,20,14,24,4,10,0,58,72,103,127,83,23,121,141,139,128,136,69,43,60,118,114,125,77,79,78,82,71,83,86,77,47,41,41,50,37,82,79,79,67,203,210,216,204,279,296,310,102,102,70,70,70,73,70,87,74,108,90,89,89,89,79,81,79,83,82,150,125,124,97,95,96,126,126,126,126,190,205,200,199,187,189,195,206,188,8,8,8,8,8,8,8,8,8,8,8,8,8]} 1. Nf3 {Quintiliano,R} Nf6 2. b3 g6 3. Bb2 Bg7 4. c4 c5 5. g3 b6 6. Bg2 Bb7 7. O-O O-O 8. d4 cxd4 9. Qxd4 Nc6 10. Qc3 {A30: Symmetrical English: Double Fianchetto and Hedgehog.} Qc7 11. Rd1 Rad8 12. Na3 {[%cal Bb1a3,Ba3c2,Bc2e3][%mdl 32]} Rfe8 13. Rac1 Qb8 14. Qe1 a6 15. Nc2 b5 {[#]} 16. Ne3 $146 ({Predecessor:} 16. c5 d5 17. cxd6 Rxd6 18. Rxd6 Qxd6 19. Nfd4 Nd5 20. Ba3 Qd7 21. Nxc6 Bxc6 22. e4 {0-1 (46) Hou,Y (2654)-Vachier Lagrave,M (2789) Karlsruhe/Baden-Baden 2018 CBM 184 [Quintiliano,R]}) 16... bxc4 17. bxc4 d6 18. Ba1 Qa7 19. Nd5 e5 (19... Ne4 $11) 20. e3 $14 Nxd5 21. cxd5 Ne7 22. Nd2 ({Better is} 22. Qa5 $16) 22... Nxd5 (22... Bxd5 $11 {keeps the balance.} 23. Bxd5 Nxd5) 23. Nc4 $16 e4 24. Bxg7 Kxg7 25. Qa5 (25. Rd4 $16) 25... Qc5 $14 26. Qd2 {[%mdl 1024] White has compensation.} Qa7 ({Black should try} 26... Ba8 $1 $14) 27. Qb2+ $16 Kg8 28. Na5 Ba8 29. Nc6 Bxc6 30. Rxc6 Rb8 31. Qd2 $36 {[%mdl 2048] White is on the roll.} Nb4 32. Rxd6 (32. Rc4 $5 {[%cal Rc4b4]} Nd3 33. Rxe4 Rxe4 34. Bxe4 $14) 32... Nd3 $1 33. Qc3 Qe7 34. Rxa6 Rec8 {[#]} 35. Rc6 {[%cal Rc6c8]} Rxc6 36. Qxc6 f5 {[#]} (36... Rb2 $14) 37. Bf1 $1 $18 Ne5 38. Qc3 Nf3+ 39. Kg2 {Threatening mate with Bc4+.} Qe5 40. Bc4+ $2 (40. Qc6 $18 {has better winning chances.}) 40... Kg7 $16 41. Qxe5+ (41. Qa3 {is more complex.} Kh6 42. Be2 Qb2 43. Qxb2 Rxb2 44. Bxf3 exf3+ 45. Kxf3 Rxa2 46. h3) 41... Nxe5 {[%mdl 4096] Endgame KRB-KRN} 42. Bb3 Nd3 43. h4 h6 44. Rb1 Nc5 45. Bc2 Ra8 46. Rb5 Nd3 47. Rb7+ Kf6 {Hoping for ...Ne1+.} 48. Rb6+ Kg7 {Strongly threatening ...Ne1+.} 49. Bb3 Rc8 ({Black should play} 49... Ne1+ 50. Kf1 Nf3) 50. Rb7+ Kf6 51. f4 {[%csl Gb3][%cal Rb7f7]} exf3+ 52. Kxf3 Rc6 53. a4 {[%cal Ba2a4,Ba4a5][%mdl 32]} Nc5 54. Rb5 g5 (54... Nxb3 $16 55. Rxb3 Ra6) 55. hxg5+ hxg5 56. Bd5 Rc7 57. a5 g4+ 58. Ke2 Ke7 {intending ...Na4.} 59. e4 $2 (59. Ba8 $18) 59... Nxe4 $11 {The position is equal.} 60. Bxe4 fxe4 {KR-KR} 61. Re5+ Kf6 62. Rxe4 Rc2+ $1 63. Ke3 $1 {Threatens to win with Ra4.} Ra2 64. Kf4 Rxa5 65. Kxg4 {Black defended with fortune.  Weighted Error Value: White=0.17/Black=0.14} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "13.8"]
[White "Ding, Liren"]
[Black "Carlsen, Magnus"]
[Result "1-0"]
[ECO "E10"]
[WhiteElo "2791"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,71,37,35,33,59,38,56,49,38,56,47,47,47,47,49,57,48,36,13,29,67,56,53,66,154,141,146,135,162,103,129,93,99,91,158,76,98,-5,140,125,238,0,191,168,174,133,133,129,307,297,529,552,534,548,547,544,507,510,896,885,939,925,1037,1051]} 1. d4 Nf6 2. c4 e6 3. Nf3 a6 (3... d5 4. Nc3 h6 5. Bf4 Bd6 6. Bxd6 Qxd6 7. e3 O-O 8. Rc1 b6 9. cxd5 Nxd5 10. Nxd5 Qxd5 11. a3 Qd6 12. Qc2 c6 13. Qe4 Qd5 14. Bd3 Qxe4 15. Bxe4 {½-½ (49) Ding,L (2791)-Carlsen,M (2862) chess24.com INT 2020}) 4. Nc3 Bb4 5. Bg5 h6 6. Bh4 {E10: Blumenfeld Gambit.} b6 7. e3 Bb7 8. Bd3 {[#] White is slightly better.} Bxc3+ $146 ({Predecessor:} 8... g5 9. Bg3 d5 10. Qa4+ Nc6 11. cxd5 Nxd5 12. Rc1 O-O 13. O-O Nxc3 14. bxc3 Bd6 {1-0 (42) Rocabado,F (2187)-Sipos,S (2006) Douglas 2016}) 9. bxc3 d6 10. O-O Nbd7 11. Nd2 g5 12. Bg3 h5 13. h3 h4 14. Bh2 g4 15. hxg4 h3 16. g3 Rg8 (16... Bg2 $14) 17. f3 $16 Qe7 18. e4 O-O-O 19. Rf2 (19. Kh1 $18) 19... Nh7 20. a4 a5 21. Rb1 Rde8 ({Black should play} 21... e5) 22. Nf1 (22. e5 $142 f6 23. exd6 cxd6 24. f4) 22... f5 23. exf5 ({White should try} 23. gxf5 $16 {Strongly threatening Ne3.} exf5 24. exf5) 23... exf5 (23... e5 $1 $11 {remains equal.}) 24. Bxf5 Ng5 (24... Kb8 $16 25. Rbb2 Ndf6) 25. c5 $2 (25. f4 $18) 25... Kb8 $2 {[#]} (25... dxc5 $11 26. d5 Nf7) 26. cxb6 $1 $18 Nxb6 27. d5 Ba6 {and if ...Be2 works, Black does fine.} 28. Qd4 {Hoping for f4.} Ka7 $2 {This move loses the game for Black.} (28... Qe5 $16 {was called for.} 29. Qxe5 Rxe5) 29. f4 Ne4 $2 {[#]} (29... Qg7 30. fxg5 Qxd4 31. cxd4 Nxd5) 30. Re1 {White is clearly winning.} Nxf2 31. Rxe7 Rxe7 32. Kxf2 ({Not} 32. Qxf2 Re2 $16) 32... Re2+ 33. Kf3 Rge8 (33... Ra2 $142) 34. Bd3 Bxd3 35. Qxd3 Rg2 36. g5 {Weighted Error Value: White=0.30/Black=0.51} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "14.1"]
[White "Dubov, Daniil"]
[Black "Carlsen, Magnus"]
[Result "1/2-1/2"]
[ECO "E07"]
[WhiteElo "2710"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "244"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,244,21,15,22,13,43,10,9,16,44,44,73,70,70,73,71,62,72,86,81,60,65,80,182,156,137,140,130,125,125,129,127,125,134,89,157,40,106,93,59,80,97,48,114,114,114,114,116,116,147,147,147,147,147,147,144,144,147,147,154,152,190,190,199,199,199,199,220,220,220,220,220,220,220,220,220,220,220,220,220,220,220,220,220,0,220,220,220,220,220,220,220,163,163,163,163,163,163,163,163,163,163,163,163,163,163,163,163,163,163,163,163,163,163,129,129,129,163,163,163,129,129,129,129,129,129,129,129,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,12841,12842,12840,12840,12841,12841,12845,12845,12846,0,0,0,0,0,12848,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. g3 Nbd7 6. Bg2 Be7 7. O-O O-O 8. b3 b6 9. Bb2 a5 {Recently 9...Ba6 got a lot of attention. E07: Closed Catalan: Main Line (5 Nf3 0-0 6 0-0 Nbd7).} 10. e4 Ba6 {[#]} 11. Ne5 $146 ({Predecessor:} 11. Nd2 Rc8 12. Re1 dxe4 13. Ndxe4 b5 14. d5 cxd5 15. cxd5 exd5 16. Nxd5 Nxd5 17. Qxd5 Rc2 18. Qd4 Nf6 19. Rec1 Qxd4 20. Bxd4 Rxc1+ 21. Rxc1 Nxe4 22. Bxe4 {1-0 (59) Predojevic,B (2617)-Saric,I (2637) Sarajevo 2011}) 11... Rc8 12. Re1 {[%cal Rc4d5]} dxc4 13. Nxc4 ({Inferior is} 13. bxc4 Nxe5 14. dxe5 Nd7 $17) 13... Bxc4 14. bxc4 e5 $1 15. Ne2 Bb4 16. Rf1 Re8 17. Qc2 Qe7 18. c5 exd4 19. cxb6 c5 (19... d3 $16 {was called for.} 20. Qxd3 Nxb6) 20. a3 Nxb6 21. axb4 axb4 {[%cal Rf6e4]} 22. Nf4 Qd6 23. Rfd1 Nbd7 24. Rac1 Qa6 25. Nd3 h5 (25... Nxe4 $142 26. Bxe4 Rxe4) 26. h3 (26. Bh3 $16) 26... b3 (26... Nxe4 $14 27. Bxe4 Rxe4) 27. Qc4 (27. Qxb3 {looks sharper.} c4 28. Nb4 Qb5 29. Bf1 d3 30. Qc3) 27... Qxc4 28. Rxc4 Nxe4 29. Bxd4 Nb6 ({Black should play} 29... f5 $1 $14) 30. Rxc5 $16 ({Not} 30. Nxc5 Nxc4 31. Nxe4 Rb8 $17) 30... Nxc5 31. Nxc5 ({Stronger than} 31. Bxc5 Na4 $15) 31... b2 32. Nd3 {[%mdl 64] Discovered Attack} Nc4 33. Nxb2 Red8 34. Bc3 Nxb2 35. Rxd8+ Rxd8 36. Bxb2 Rd1+ 37. Bf1 $1 Rb1 38. Bd4 Rd1 39. Be3 Ra1 40. Kg2 Ra5 41. Kf3 Rf5+ 42. Ke4 Ra5 43. Bc4 Ra4 44. Kd5 Ra1 45. Kd6 Kf8 46. Bc5 Rd1+ 47. Kc6+ Kg8 48. Bd5 Rd3 49. Be4 Rd2 50. Bd5 Rd3 $1 51. Be3 g6 52. Kd6 Kg7 53. Ke5 Rd1 54. g4 hxg4 55. hxg4 Rd3 56. Bg5 Rd1 57. Bf6+ Kf8 58. Kd6 Rd2 59. f3 Rd1 60. Bc3 Rd3 61. Be5 Rd1 62. f4 Rg1 {[#]} 63. g5 $1 Rd1 64. Kc6 Rd2 65. Bd6+ Kg7 66. Bb3 Rd3 67. Bc4 Rd1 68. Kd7 Rd4 69. Bb5 f6 70. Ke6 Re4+ 71. Kd5 Re1 72. gxf6+ (72. Bc5 $16 Kf7 73. Bc4 fxg5 74. fxg5) 72... Kxf6 $11 73. Be5+ (73. f5 {keeps more tension.} gxf5) 73... Ke7 74. Bd3 Kf7 75. Bc4 Ke7 76. Kd4 Ra1 77. Bd3 (77. f5 {is more complex.} gxf5) 77... Kf7 78. Kd5 (78. f5 {seems wilder.} gxf5 79. Bxf5) 78... Rd1 79. Ke4 (79. Kc4 {with more complications.} Rc1+ 80. Bc3 Rg1 81. Bb4 Kg7 82. Kd4) 79... Re1+ 80. Kd4 Rd1 81. Bc7 Ke7 82. Ke3 Rc1 83. Bb6 Rg1 $2 {[%mdl 8192]} (83... Rc6 $11) 84. Kf3 $18 Rc1 85. Kg4 Rc3 86. Be4 Kf7 87. Bd5+ Ke7 {[#]} 88. Ba5 $2 (88. Bf2 $1 $18 Rd3 89. Be4) 88... Rc1 $11 89. Bb6 Rd1 90. Bf3 (90. Bc5+ {with more complications.} Kf6 91. Be7+ Kxe7) 90... Rf1 $2 {[%mdl 8192]} (90... Rb1 $11) 91. Bg2 $2 (91. Be4 $18 Kf6 92. Bd4+ Ke6 93. Bxg6) 91... Rb1 {The position is equal.} 92. Bc5+ Kf7 93. Be4 Re1 94. Bd5+ Kg7 95. Bf3 (95. f5 {with more complications.} gxf5+ 96. Kxf5) 95... Rc1 96. Be3 (96. Bg2 {is more complex.} Rxc5) 96... Rb1 (96... Re1 {seems wilder.} 97. f5 Rxe3) 97. Bd4+ Kh6 98. Bc5 Kg7 99. Be2 Rc1 100. Be3 (100. Bd3 {is interesting.} Rxc5) 100... Re1 101. Bd4+ (101. f5 {looks sharper.} Rxe2) 101... Kh6 102. Bf3 (102. f5 {feels hotter.} Rxe2) 102... Rb1 103. Bf6 Rg1+ 104. Kh4 Rb1 105. Bg5+ (105. f5 {seems wilder.} gxf5) 105... Kg7 106. Kg3 Rb3 107. Kf2 {And now Be4 would win.} Ra3 108. Ke2 Rb3 109. Be4 Ra3 110. Bd3 Rb3 111. Ke3 Rb4 112. Be4 Ra4 113. Bd5 Rb4 114. Kd3 {Black must now prevent Ke3.} (114. f5 {keeps more tension.} gxf5) 114... Ra4 115. Bc4 Ra1 116. Kd4 Re1 117. Kd5 {Threatens to win with Bh4.} Rd1+ 118. Ke5 {Hoping for Bf6+.} Re1+ 119. Kd6 {Strongly threatening Kc5.} Rd1+ 120. Ke7 Re1+ 121. Be6 {aiming for Kd6.} Re4 122. Kd6 {Bd7 is the strong threat.} Re1 {Weighted Error Value: White=0.14/Black=0.11} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "14.2"]
[White "Vachier-Lagrave, Maxime"]
[Black "Ding, Liren"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2784"]
[BlackElo "2791"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,47,5,0,-37,-26,-25,-7,-10,0,0,-1,0,0,0,0,0,0,0,33,22,8,17,9,22,21,8,18,41,76,89,83,91,110,125,275,255,331,177]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Rg1 b5 {[%cal Bb7b5,Bb5b4][%mdl 32]} 7. a4 $5 {[%mdl 4] Exploring less charted territory. B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} b4 8. Nd5 {[#]} Nxe4 $146 ({Predecessor:} 8... e6 9. Nxf6+ Qxf6 10. Be3 Bb7 11. Qd2 Bxe4 12. f3 Bb7 13. Qxb4 Qe7 14. Qb6 Qd7 {1-0 (76) Nepomniachtchi,I (2784)-Giri,A (2764) chess24.com INT 2020}) 9. Bc4 {[#] Black must now prevent Qf3.The position is equal.} e6 {Hoping for ...Bb7.} 10. Qe2 Nc5 11. c3 Be7 12. Nxe7 Qxe7 13. cxb4 Ncd7 14. Bd2 $36 {[%mdl 2048] White has some pressure.} Ne5 15. Bb3 O-O 16. O-O-O Nbc6 17. Nc2 Rb8 18. Bc3 Ng6 19. g3 e5 20. Bd5 Qd7 21. f4 Bb7 22. Bb3 exf4 (22... Bc8 $16) 23. gxf4 $18 Qf5 24. Qd2 {Weighted Error Value: White=0.03/Black=0.15} ({Not} 24. Rxd6 Qxf4+ {[%mdl 64] Double Attack} 25. Qd2 Qxd2+ 26. Rxd2 (26. Bxd2 Nce5 $14) (26. Kxd2 Kh8 $14) 26... Kh8 $16) (24. Qf1 $142) 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "14.3"]
[White "So, Wesley"]
[Black "Radjabov, Teimour"]
[Result "1/2-1/2"]
[ECO "D37"]
[WhiteElo "2770"]
[BlackElo "2765"]
[Annotator "TA"]
[PlyCount "38"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,38,23,27,26,27,30,23,29,20,32,23,16,28,13,28,17,20,11,10,13,16,30,15,0,24,0,26,0,23]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. a3 {D37: Queen's Gambit Declined: 5 Bf4.} c5 8. cxd5 Nxd5 9. Nxd5 {White has an edge.} exd5 10. dxc5 Nxc5 11. Be5 Bf5 12. Be2 Bf6 13. Bxf6 $1 {[%mdl 4] is now more promising than 13.0-0.} Qxf6 14. Qd4 Qd6 {next ...Nb3 is good for Black.} 15. Rd1 Rfd8 {Threatening ...Bc2.} 16. Qd2 {[#]} Qf6 $5 $146 {[%mdl 8] An interesting novelty.} ({Predecessor:} 16... Nb3 17. Qc3 Qb6 18. Nd4 Nxd4 19. Qxd4 Qxd4 20. Rxd4 Rac8 21. g4 Rc1+ 22. Rd1 Rxd1+ 23. Bxd1 Be6 24. f4 f5 25. gxf5 Bxf5 26. Bb3 {½-½ (66) Nepomniachtchi,I (2784)-Nakamura,H (2736) chess24.com INT 2020}) 17. Qd4 Qd6 18. Qd2 Qf6 19. Qd4 Qd6 {A rather calm draw.  Weighted Error Value: White=0.06/Black=0.00} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "14.4"]
[White "Aronian, Levon"]
[Black "Vidit, Santosh Gujrathi"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2781"]
[BlackElo "2726"]
[Annotator "TA"]
[PlyCount "95"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,94,25,35,33,30,-12,30,39,31,31,36,29,37,29,29,29,27,38,38,37,36,31,31,29,22,10,12,8,3,10,9,27,20,10,15,15,32,40,45,41,40,0,0,0,0,0,0,0,0,0,24,0,57,57,91,91,91,9,9,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. e4 {D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} (7. e3 Nc6 8. Qd3 Bc5 9. Be2 d4 10. exd4 Nxd4 11. O-O O-O 12. Nxd4 Qxd4 13. Qg3 Ne4 14. Nxe4 Qxe4 15. Bf3 Qb4 16. Bf4 Bf5 17. a3 Qb6 18. Bc7 Qb5 19. b4 Be7 {1-0 (53) Aronian,L (2781)-Vidit,S (2726) chess24.com INT 2020}) 7... dxe4 $1 {[%mdl 4] now scores much better than the old 7...Nc6.} 8. Qxd8+ Kxd8 9. Ng5 {White has an edge.} Be6 10. Nxe6+ fxe6 11. Bg5 Nc6 12. Bc4 Ke7 13. Nxe4 {[#]} Kf7 $146 ({Predecessor:} 13... Rd8 14. Nxf6 gxf6 15. Be3 Bg7 16. O-O Kf7 17. Rfe1 Rhe8 18. h4 Nd4 19. Rac1 f5 {1-0 (103) Kopeikin,V (2426)-Liskevich,V (2401) ICCF email 2013}) 14. Bxf6 gxf6 15. O-O-O Rd8 16. Rxd8 Nxd8 17. Rd1 Be7 18. f4 f5 19. Ng5+ Bxg5 20. fxg5 $11 {[%mdl 4096] Endgame KRB-KRN} Ke7 21. Bb5 {[#] Threatens to win with Rd7+.} Nc6 22. Bxc6 bxc6 {KR-KR} 23. Rd4 Rg8 24. h4 h6 25. gxh6 {And now h7 would win.} Rh8 26. g4 (26. Ra4 {is interesting.} Rxh6 27. Rxa7+ Kd6 28. g3 e5 29. Rf7) 26... fxg4 27. Rxg4 Rxh6 28. Kd2 a5 29. Ke3 Kf6 30. Rf4+ Kg6 31. Rc4 Rh5 (31... Kf5 $11) 32. Rxc6 $14 Rxh4 33. Rxe6+ Kf7 {[#]} 34. Re5 (34. Rb6 $1 $16) 34... Rb4 $1 $11 {The position is equal.} 35. b3 a4 36. Re4 (36. bxa4 {is more complex.} Rxa4 37. Rf5+ Ke6 38. Rf2 Kd5 39. Rc2) 36... Rxe4+ 37. Kxe4 {White threatens Kd5 and mate.} axb3 38. axb3 {White wants to mate with Kd5. KP-K} Ke6 39. b4 {[%cal Bb3b4,Bb4b5,Bb5b6,Bb6b7][%mdl 32]} Kd6 40. Kd4 (40. b5 {looks sharper.} Kc7 41. Kd4 Kb7 42. Kc5 Kc7 43. Kb4) 40... Kc6 41. Kc4 Kb6 42. b5 Kb7 43. Kc5 Kc7 44. b6+ Kb7 45. Kb5 Kb8 46. Kc6 Kc8 47. b7+ Kb8 48. Kb6 {Weighted Error Value: White=0.07/Black=0.05} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "14.5"]
[White "Bluebaum, Matthias"]
[Black "Nakamura, Hikaru"]
[Result "0-1"]
[ECO "D05"]
[WhiteElo "2670"]
[BlackElo "2736"]
[Annotator "TA"]
[PlyCount "172"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,172,0,0,0,0,0,5,7,18,16,14,8,19,9,53,54,61,47,55,38,40,43,41,44,42,43,45,31,54,48,49,35,58,23,27,22,34,0,0,0,0,0,10,0,0,0,6,0,0,-26,19,14,13,5,7,6,31,25,79,15,0,0,33,-4,-9,-31,0,0,0,-39,-36,-26,-32,-96,-97,-110,-36,-86,-44,-43,-41,-53,-54,-73,-69,-76,-74,-72,-47,-47,-31,-31,-16,-25,0,0,0,-54,-23,-28,-28,-171,-164,-188,-184,-168,-194,-181,-185,-193,-193,-184,-182,-195,-195,-215,-212,-212,-203,-176,-130,-206,-206,-206,-206,-206,-206,-208,-225,-228,-220,-296,-297,-304,-289,-654,-655,-622,-614,-387,-287,-1516,-2075,-1572,-1438,-29972,-29973,-29973,-29974,-29974,-29975,-29975,-29976,-29976,-29976,-29976,-29977,-29977,-29977,-29978,-29978,-29978,-29979,-29979,-29980]} 1. d4 Nf6 2. Nf3 d5 3. e3 c5 4. Nbd2 Nc6 5. c3 cxd4 6. exd4 {D05: Colle System with ...e6.} Bf5 7. Nh4 Bg4 8. Ndf3 {[#] The position is equal.} e6 $146 ({Predecessor:} 8... Ne4 9. Qb3 a6 10. h3 Bc8 11. Bd3 h6 12. g3 g5 13. Ng2 Bg7 14. h4 g4 {½-½ (53) Krainski,J (2229)-Korkus,M (2249) ICCF email 2011}) 9. h3 Bh5 10. Bd3 Bd6 11. Qe2 Bg6 12. Nxg6 hxg6 13. Bg5 Qc7 14. g3 O-O-O 15. O-O-O Kb8 16. Kb1 Rc8 17. h4 Na5 18. Ne5 Ka8 19. Bf4 Rhd8 20. Rc1 Nc6 21. Rhe1 Bxe5 22. dxe5 Nd7 23. h5 gxh5 24. Qxh5 g6 25. Qe2 Rh8 26. c4 d4 27. c5 Nb4 28. a3 Nd5 29. Rc4 Nb8 30. Rxd4 Qxc5 31. Rc4 Qb6 32. Bd2 Nc6 33. Rec1 Rh2 (33... Rc7 $11) 34. Be1 (34. Rc5 $16) 34... Rd8 $11 35. Be4 a6 36. Rd1 Nxe5 37. Rcc1 Nc6 38. Qf3 Ne5 39. Qe2 f6 40. Ka1 g5 41. Qd2 (41. Rd2 $15) 41... Nc6 42. Qd3 Rhh8 (42... Ka7 $17 43. Kb1 f5 44. Bxd5 Rxd5) 43. Kb1 Ne5 44. Qe2 g4 45. Bg2 Rhe8 46. Qe4 Qb3 47. Qc2 Qxc2+ 48. Kxc2 f5 49. Kb1 Nc6 50. Bd2 Rg8 51. Rh1 Nd4 52. Ba5 Rd7 {...Nb3 is the strong threat.} 53. Ka2 (53. Bxd5 $11 Rxd5 54. Bb6) 53... Ka7 54. Rh6 Re8 55. Rd1 {White does not recover from this.} (55. Bxd5 $11 {and White stays safe.} Rxd5 56. Bd2) 55... Nc6 $1 $19 {[%cal Rc6a5]} 56. Bd2 Nb6 57. Bxc6 bxc6 58. Kb1 Red8 59. Kc1 Rd6 60. b3 R8d7 61. a4 Kb7 62. Kc2 c5 $1 63. Rhh1 Kc6 64. Rhe1 Nd5 65. Re2 (65. Rc1 $17) 65... Nb4+ 66. Kc1 e5 {White must now prevent ...f4!} 67. Rh1 {intending Bxb4.} Nd3+ 68. Kc2 f4 $1 {[%cal Rf4f3] Hoping for ...f3.} 69. gxf4 exf4 {Strongly threatening ...f3.} 70. Bc3 {[#]} Nb4+ $1 71. Bxb4 cxb4 {[%mdl 4096] Endgame KRR-KRR} 72. Rg1 $2 (72. Rc1) 72... f3 73. Re4 Rd2+ 74. Kc1 R7d4 75. Rexg4 $2 (75. Rxd4 Rxd4 76. Kc2) 75... Rxg4 76. Rxg4 Rxf2 77. Rxb4 {[#] KR-KR} Ra2 $1 {Black mates.} 78. Rf4 f2 79. Kd1 a5 80. Rf5 Kd6 81. Rf3 Kd5 82. Rf4 Ke5 83. Rf8 Kd4 84. Rf3 Ke4 85. Rf8 Ke3 86. Re8+ Kd3 {[%cal Ra2a1] Weighted Error Value: White=0.16/Black=0.10} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "14.6"]
[White "Shankland, Sam"]
[Black "Nepomniachtchi, Ian"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2691"]
[BlackElo "2789"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,70,18,27,7,35,33,57,35,30,34,42,29,34,34,40,4,90,83,75,48,81,70,84,67,68,80,133,104,102,106,124,85,79,38,81,80,77,34,34,29,32,29,33,29,61,50,62,48,44,16,16,16,16,16,16,16,16,16,16]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nb3 Be7 8. h3 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} Nc6 {[%cal Bb8c6,Bc6a5,Ba5c4][%mdl 32]} 9. g4 h6 10. Qf3 {White is slightly better.} Be6 11. O-O-O Rc8 12. Kb1 Na5 {[#]} 13. Bc1 $146 ({Predecessor:} 13. Nc5 O-O 14. Rg1 Nh7 15. g5 Bxg5 16. Qg2 Kh8 17. h4 Bf6 18. Qg3 Rc6 19. Be2 {½-½ (71) Ibermax (2461)-Jazzled,R (2553) playchess.com INT 2006}) 13... Nc4 14. Nd5 Nxd5 (14... Nd7 $11 {remains equal.}) 15. exd5 $16 Bd7 16. Bd3 a5 17. Qe4 b5 18. f4 a4 19. Nd2 {[%cal Rd2c4]} Qc7 (19... exf4 $142 20. Nxc4 (20. Bxc4 bxc4 21. Nxc4 O-O $11) 20... bxc4 21. Bxc4 O-O) 20. Rhe1 Bf6 21. Nf3 Kd8 22. Bxc4 Qxc4 23. fxe5 (23. Bd2 {is more complex.} Qxe4 24. Ba5+ Ke7 25. Rxe4 Rc4 26. Rxc4 bxc4 27. Re1) 23... Bxe5 24. Nxe5 dxe5 25. Qxc4 (25. Qg2 {feels hotter.} f6 26. a3 Be8 27. Rd3 Qc7 28. d6) 25... Rxc4 26. Rxe5 f6 27. Re3 {And now b3 would win.} Re8 28. b3 axb3 29. axb3 Rxe3 30. Bxe3 $11 {[%mdl 4096] Endgame KRB-KRB} Re4 31. Bc5 f5 {The position is equal.} 32. Rd4 Rxd4 33. Bxd4 fxg4 34. hxg4 Bxg4 35. Bxg7 Bf3 {Weighted Error Value: White=0.10/Black=0.14} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "14.7"]
[White "Dominguez Perez, Leinier"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2758"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "47"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,47,17,39,0,14,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. Rd1+ {9.h3 is becoming the main line.} Ke8 10. Nc3 (10. Bf4 Ne7 11. h3 Ng6 12. Bh2 Be7 13. Nc3 Bd7 14. Nd4 Nf8 15. Rd2 h5 16. Rad1 Rd8 17. a3 h4 18. Nce2 c5 19. e6 Nxe6 20. Nxe6 Bxe6 21. Bxc7 Rxd2 22. Rxd2 {½-½ (31) Dominguez Perez,L (2754)-Giri,A (2734) Wijk aan Zee 2014}) 10... Ne7 11. a4 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} (11. h3 {seems wilder.} Bf5 12. Nd4 Bg6 13. Bf4 Nf5 14. Nf3) 11... Ng6 {The position is equal.} (11... Bg4 {is interesting.} 12. Bf4 h6 13. e6 fxe6 14. Bxc7 Bxf3 15. gxf3 Nd5) 12. a5 (12. h3 {keeps more tension.} Be7 13. b3 Bd7 14. Be3 a6 15. Rdb1) 12... Bg4 13. Ra4 Bxf3 14. gxf3 Be7 15. f4 {[#]} Rd8 $146 ({Predecessor:} 15... f5 16. exf6 Bxf6 17. Ne4 Rd8 18. Rxd8+ Kxd8 19. Be3 b6 20. axb6 axb6 21. f5 Ne7 {½-½ (49) Dominguez Perez,L (2758)-Nakamura,H (2736) Lichess.org INT 2020}) 16. Rxd8+ Kxd8 17. Be3 a6 18. Ne4 Kc8 19. Kf1 Rd8 20. Ke2 Rd5 21. Nc3 Rd8 22. Ne4 Rd5 23. Nc3 Rd8 24. Ne4 {An uneventful encounter.  Weighted Error Value: White=0.04/Black=0.03} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "14.8"]
[White "Duda, Jan-Krzysztof"]
[Black "Grischuk, Alexander"]
[Result "1-0"]
[ECO "E60"]
[WhiteElo "2743"]
[BlackElo "2777"]
[Annotator "TA"]
[PlyCount "55"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,55,44,30,32,20,36,10,8,15,21,0,-5,0,0,-8,7,10,21,7,52,41,43,0,50,44,54,52,80,0,77,87,114,110,145,135,200,208,412,416,417,427,426,410,378,394,897,920]} 1. Nf3 Nf6 2. c4 g6 3. g3 Bg7 4. Bg2 O-O 5. d4 d6 6. O-O Ne4 {E60: King's Indian: Unusual lines and Fianchetto Variation without Nc3.} 7. b3 a5 8. Qc2 f5 {The position is equal.} 9. Bb2 Nc6 {[#]} 10. Nbd2 $146 ({Predecessor:} 10. a3 e5 11. dxe5 dxe5 12. Rd1 Qe7 13. Nbd2 Nc5 14. Ne1 Nd4 15. Bxd4 exd4 16. Nd3 {0-1 (35) Jovanic,O (2447)-Pogosian,V (2168) Pardubice 2005}) 10... Nxd2 11. Qxd2 e5 $1 12. d5 Nb4 13. a3 $36 {[%cal Ba2a3,Ba3a4,Ba4a5][%mdl 2080] White has the initiative.} Na6 14. Qxa5 Bd7 15. Qc3 Nc5 16. Nd2 Qe7 17. a4 Rf7 18. Qc2 f4 19. Ne4 ({Better is} 19. a5 $16) 19... Bf5 (19... Nxe4 $1 $11 {keeps the balance.} 20. Bxe4 Qg5) 20. b4 $16 Nd7 21. a5 Kh8 22. Qb3 g5 (22... Rb8 $16 23. c5 Bxe4 24. cxd6 (24. Bxe4 dxc5 25. b5 Rff8 $16) 24... cxd6 25. Bxe4 fxg3 26. hxg3 (26. fxg3 Nf6 $16) 26... Nf6) 23. c5 $18 dxc5 $2 {[#]} (23... Bxe4 {keeps fighting.} 24. Bxe4 Rb8 25. cxd6 Qxd6) 24. d6 $1 {[%mdl 576] Deflection} cxd6 {[#]} 25. Nxd6 $1 {[%mdl 576] Discovered Attack} Qxd6 26. Qxf7 Be6 27. Rad1 Qa6 $2 (27... Qxd1 28. Rxd1 Bxf7) 28. b5 {Accuracy: White = 82%, Black = 50%.} 1-0

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "15.1"]
[White "Grischuk, Alexander"]
[Black "Dubov, Daniil"]
[Result "1/2-1/2"]
[ECO "A67"]
[WhiteElo "2777"]
[BlackElo "2710"]
[Annotator "TA"]
[PlyCount "174"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,174,33,35,118,55,57,55,71,64,54,54,63,43,68,23,27,19,25,54,30,0,2,-30,-57,-68,0,0,0,0,4,-40,-40,-39,-37,-36,-37,-37,-41,-39,-39,-45,-53,-66,-61,-72,-69,-68,-54,-56,-54,-64,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-8,0,-8,0,0,0,-8,0,0,0,-7,-7,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-8,-7,-7,-7,-8,-8,-8,-8,-8,-8,-8,0,-8,-8,-8,-8,-8,-8,-8,0,-8,0]} 1. d4 Nf6 2. c4 c5 3. d5 e6 4. Nc3 exd5 5. cxd5 d6 6. e4 g6 7. f4 Bg7 8. Bb5+ Nfd7 9. a4 O-O 10. Nf3 {[#]} c4 $146 {[#] A67: Modern Benoni: Taimanov Variation.} (10... f5 $14) ({Predecessor:} 10... Na6 11. O-O Nb4 12. Kh1 a6 13. Be2 Nf6 14. Bc4 Bg4 15. Bd2 Re8 16. h3 Bxf3 17. Qxf3 Nc2 18. Rad1 Nd4 19. Qd3 b5 20. axb5 axb5 21. Bxb5 Nxb5 22. Qxb5 Nxe4 23. Nxe4 Rxe4 {0-1 (56) Moiseenko,A (2635)-Cheparinov,I (2670) chess24.com INT 2020}) 11. O-O ({White should try} 11. Be3 $1 $16) 11... Nc5 $1 $14 12. Bxc4 Bg4 {White is slightly better.} 13. h3 Bxf3 14. Qxf3 Nbd7 15. Be3 Rc8 16. Rac1 {White wants to play Nb5.} Nb6 17. Be2 {With the idea a5.} Ncxa4 18. Nxa4 Rxc1 19. Bxc1 {Black must now prevent Nc3.} Nxa4 20. e5 dxe5 21. f5 e4 ({Better is} 21... Nb6 $15) 22. Qxe4 $11 Nb6 23. d6 Nc8 24. d7 ({Don't play} 24. Qxb7 Nxd6 25. Qf3 Nxf5 $17) (24. f6 {is more complex.} Bxf6 25. d7 Nb6 26. Bh6 Nxd7 27. Bxf8 Qb6+ 28. Kh1) 24... Qxd7 25. f6 {[#]} Re8 $1 26. Qg4 Qxg4 27. Bxg4 Bf8 28. Bf3 Bc5+ 29. Kh2 Nd6 30. g4 Bd4 31. Bf4 Ne4 32. g5 h6 33. h4 hxg5 34. hxg5 Bxb2 ({Black should play} 34... Nc5 $15 35. b4 Ne6) 35. Re1 $1 {[%cal Re1e4] The position is equal.} Nxf6 36. Rb1 Nh5 37. Bxh5 Be5 38. Bxe5 Rxe5 {[%mdl 4096] Endgame KRB-KR} 39. Bf3 b6 40. Rg1 a5 41. Kh3 a4 42. Kg4 a3 43. Ra1 Ra5 44. Bd1 b5 45. Bb3 b4 46. Rf1 Ra7 47. Rf4 Rb7 48. Rd4 Kf8 49. Re4 Rb8 50. Rf4 Rb7 51. Re4 Ra7 52. Rxb4 a2 53. Bxa2 Rxa2 {KR-KR} 54. Rb8+ Kg7 55. Rc8 (55. Kf4 {looks sharper.} Rf2+ 56. Kg3 Rf1 57. Kg4 Rf5 58. Rc8) 55... Ra4+ 56. Kg3 Rd4 (56... f5 $5 {[%cal Ra4g4]} 57. gxf6+ Kf7 $11) 57. Rb8 (57. Ra8 {seems wilder.} Rd3+ 58. Kg4 Rd2 59. Ra7 Rd4+ 60. Kf3) 57... Rd1 58. Kg4 Rh1 59. Ra8 Rh5 (59... Rh2 {with more complications.} 60. Ra7 Rd2 61. Kf3 Rd3+ 62. Kg4 Rc3) 60. Rb8 (60. Ra6 {is more complex.} Rh2 61. Ra8 Rg2+ 62. Kf4 Rf2+ 63. Kg4) 60... Rh8 61. Rb7 Rd8 62. Ra7 $1 Kf8 63. Rb7 Rd4+ 64. Kg3 Ke8 65. Ra7 Rd7 66. Ra1 Rd3+ 67. Kg4 Rd4+ 68. Kg3 $1 Rd5 69. Kg4 Ke7 70. Ra7+ Ke6 71. Ra6+ Rd6 72. Ra4 Ke5 {...Rd4+ is the strong threat.} 73. Ra7 Rd4+ 74. Kg3 Ke6 75. Ra6+ Rd6 76. Ra7 Rd7 77. Ra6+ Kf5 78. Ra5+ Ke4 79. Ra4+ Ke5 80. Ra5+ Rd5 81. Ra7 Ke6 82. Ra6+ Rd6 83. Ra7 Rb6 84. Kg4 Rc6 85. Kf4 Rc4+ 86. Kg3 Rd4 87. Ra6+ Rd6 {Weighted Error Value: White=0.06/Black=0.07} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "15.2"]
[White "Giri, Anish"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "E42"]
[WhiteElo "2764"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "143"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,143,18,18,10,27,19,73,31,39,44,37,40,45,42,40,37,35,29,37,30,67,70,68,72,70,71,71,79,100,90,118,103,104,70,63,60,68,60,69,78,95,63,108,108,103,94,97,74,58,27,74,66,72,80,97,16,16,10,10,10,14,8,8,8,11,0,0,0,0,0,1,4,56,56,56,23,38,23,23,17,29,28,33,23,32,33,32,33,31,31,68,68,72,68,70,70,70,70,72,14,14,8,8,4,8,4,4,4,4,4,4,4,4,4,4,4,4,4,4,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 c5 5. Nge2 cxd4 6. exd4 d5 7. a3 Bxc3+ 8. Nxc3 dxc4 9. Bxc4 O-O 10. O-O Nc6 11. Be3 b6 {11...h6 is vanishing.} 12. Ba2 Bb7 13. Re1 {E42: Nimzo-Indian: Rubinstein: 4...c5 5 Ne2.} Ne7 14. Bg5 Ng6 (14... Kh8 $11) 15. d5 {[#] White is better.} exd5 $146 ({Predecessor:} 15... h6 16. Bxf6 Qxf6 17. Ne4 Qxb2 18. dxe6 fxe6 19. Bxe6+ Kh8 20. Rb1 Qxa3 21. Nd6 Bxg2 22. Kxg2 {½-½ (39) Ragger,M (2646)-Luther,T (2556) Austria 2014}) 16. Qd4 h6 17. Bxf6 Qxf6 18. Qxf6 gxf6 19. Rad1 Rfe8 20. Bxd5 Bxd5 21. Nxd5 Kg7 22. Rxe8 Rxe8 $14 {[%mdl 4096] Endgame KRN-KRN} 23. Ne3 Re5 24. g3 f5 25. Rd4 Nf8 26. Rd3 Rb5 27. b4 {[#] And now Nd5 would win.} a5 28. Nd5 axb4 29. axb4 Nh7 30. Rd4 {aiming for f4.} Nf6 $1 31. Ne3 Re5 32. Kf1 Kg6 33. Ke2 Re6 34. f3 b5 35. Rd2 Ra6 36. Rc2 Nd7 37. f4 Nf8 38. Rd2 Ne6 39. Nd5 (39. Rd5 $16) 39... Ra3 $11 40. Ne7+ Kf6 41. Nc6 h5 42. Ne5 Ke7 43. Rd7+ Ke8 44. Rxf7 Nd4+ 45. Kf2 Ra2+ 46. Ke3 Nc2+ 47. Kd3 Ne1+ ({Black should try} 47... Nxb4+ $11 48. Kc3 Nd5+ 49. Kd4 Rd2+ 50. Kc5 Nc3) 48. Kc3 $14 Rc2+ $1 49. Kb3 Rxh2 50. Rxf5 Rh3 51. Kb2 {Strongly threatening Rg5.} Rxg3 52. Rxh5 Re3 53. Rh6 {[#] Black must now prevent Re6+.} Kd8 54. Rd6+ Kc7 55. Rc6+ Kb7 56. Rc5 Re4 57. Rxb5+ Ka6 58. Ra5+ Kb6 59. Kc3 {f5 is the strong threat.} Rxf4 60. Nc4+ Kb7 61. b5 (61. Rd5 $16) 61... Rf3+ $1 $11 {The position is equal.} 62. Kd4 Nc2+ 63. Ke4 Rh3 64. Nd6+ Kc7 65. Ra6 Rh4+ 66. Kf3 Rb4 67. Rc6+ (67. Ke2 {with more complications.} Rb3 68. Kd2 Nd4 69. Ne8+ Kb7 70. Rf6) 67... Kd7 {Hoping for ...Nd4+.} 68. Rxc2 {Threatens to win with Rd2.} Kxd6 69. Rd2+ Kc5 70. Ke3 Kxb5 71. Rd4 Rxd4 72. Kxd4 {Weighted Error Value: White=0.09/Black=0.10} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "15.3"]
[White "Nepomniachtchi, Ian"]
[Black "Dominguez Perez, Leinier"]
[Result "0-1"]
[ECO "E48"]
[WhiteElo "2789"]
[BlackElo "2758"]
[Annotator "TA"]
[PlyCount "126"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,126,-10,-7,-7,-6,0,0,0,4,3,8,10,38,-76,-19,-49,-44,-42,8,28,28,-1,42,20,53,69,52,40,60,17,35,0,40,-81,29,16,41,0,0,-18,20,-85,-77,-72,0,-99,-93,-106,0,0,10,0,99,87,101,12,35,4,12,0,12,9,14,0,0,-20,-12,-301,-305,-441,-423,-445,-438,-472,-294,-460,-326,-286,-239,-246,-143,-135,-37,-337,-316,-422,-269,-267,-265,-272,-258,-996,-979,-1056,-1002,-5520,-1549,-3661,-1569,-606,0,-2661,-1142,-5110,-2664,-1543,0,-1892,-1970,-1796,-1660,-1122,-1080,-29998,-29999]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Bd3 d5 6. cxd5 exd5 7. Nge2 Re8 8. Bd2 {E48: Nimzo-Indian: Rubinstein: 5 Bd3 d5 including 6 Ne2, but excluding 6 a3.} Bd6 9. Rc1 c6 10. O-O {[#] The position is equal.} Na6 $1 $146 {[%mdl 8] A top novelty.} ({Predecessor:} 10... Nbd7 11. f3 c5 12. dxc5 Bxc5 13. Nd4 Ne5 14. Be1 Bd7 15. Bh4 Nxd3 16. Qxd3 Qb6 17. Bxf6 Qxf6 18. Nxd5 {1-0 (60) Yu,Y (2709)-Abdusattorov,N (2627) chess.com INT 2020}) 11. f3 c5 12. Kh1 Nc7 13. g4 (13. Nb5 $14 {keeps the upper hand.}) 13... b6 ({Black should play} 13... c4 $17 14. Bc2 b5) 14. Ng3 g6 15. Nce2 Bb7 16. g5 Nd7 17. h4 Nf8 18. Kg2 Ba6 19. Bxa6 Nxa6 20. dxc5 bxc5 21. e4 d4 22. Qa4 Nc7 23. b4 (23. f4 $14 {stays ahead.}) 23... Nce6 (23... d3 $17 24. Nf4 Nfe6 25. Nxe6 Nxe6) 24. bxc5 $11 Bxc5 25. Rfd1 (25. f4 $5 {[%cal Rf4f5]}) 25... Rb8 26. Bc3 Qb6 (26... Qe7 {looks sharper.} 27. Nxd4 Bxd4 28. Rxd4 h6 29. Rdd1 hxg5 30. h5 g4) 27. Ba1 (27. Nxd4 $11 {keeps the balance.} Nxd4 28. Bxd4 Bxd4 29. Qxd4) 27... Red8 $17 {...d3 is the strong threat.} 28. Rd3 Qb7 (28... Qd6 $17 29. f4 Qxf4 $1 30. Nxf4 Nxf4+ 31. Kh1 Nxd3) 29. Rcd1 (29. f4 $11 {remains equal.}) 29... Bb6 30. Qb4 {[#]} (30. Bxd4 $2 Bxd4 31. Rxd4 Nxd4 $19) 30... Qa6 (30... Qc7 $1 $17 31. Qa3 Nf4+ 32. Nxf4 Qxf4) 31. Qa3 $11 Qc4 32. f4 Qc6 (32... Bc5 $11 33. Qc1 Qxa2) 33. Qc1 $16 Qb7 34. Kh2 ({But not} 34. Nxd4 $6 Rbc8 $11) (34. Rf3 $16) 34... Rbc8 35. Qb2 {[%cal Re2d4]} Qc7 36. Rc1 Qb8 37. Rf1 Bc7 {[%cal Rc7f4]} 38. Qd2 (38. Qxb8 {is more complex.} Bxb8 39. Kh3 Rc4 40. f5 Nc5 41. Rxd4 Rdxd4 42. Bxd4 Bxg3 43. Bxc5 Be5 44. Bxa7 Rxe4 45. Ng3) 38... Qb5 39. Rb3 Qa6 40. f5 $2 {[%mdl 8192]} (40. Qb2 $11 {and White stays safe.}) 40... Nc5 $19 41. fxg6 (41. Rbf3 $142 Nxe4 42. Qd3 Bxg3+ 43. Nxg3 Qxa2+ 44. Kh3 Nxg3 45. R3f2 Qxf2 {[%mdl 64] Remove Defender} 46. Rxf2 Nxf5 47. Qa3) 41... hxg6 42. Rbf3 Nxe4 43. Qb2 Be5 44. Kg2 (44. Kg1 {only move.} Rb8 45. Qa3 Qxa3 46. Rxa3) 44... Nxg3 45. Nxg3 Qc6 46. Kg1 Rb8 (46... Ne6 $19 47. Qg2 {[#]} Nf4 $1 {[%mdl 512]}) 47. Qf2 $17 Qd5 (47... Qe6 $17 {White must now prevent ...Rb7.} 48. Rd3 Rb4) 48. h5 $2 {[%mdl 8192]} (48. Rxf7 $15 Ne6 49. Qf3) 48... Ne6 $19 49. Qd2 d3 {And now ...Bxa1 would win.} 50. Bxe5 Qxe5 51. hxg6 fxg6 52. Re3 $2 (52. Qe3 Qxe3+ 53. Rxe3 Nxg5 54. Ne4 Nxe4 55. Rxe4) 52... Qxg5 53. Rfe1 Nf4 54. Kh2 Qh4+ 55. Kg1 Nh3+ (55... Rbc8 $142 56. Nf5 gxf5) 56. Kg2 Nf4+ (56... Ng5 $142 57. Rf1 Qd4 58. Rxd3 Qxd3 59. Qxg5 Rb2+ 60. Kh3 Rd7 61. Rf8+ {[%mdl 64] Decoy} Kxf8 62. Qf6+ Kg8 63. Qxb2 Qe3) 57. Kg1 Rf8 (57... Rbc8 $142 58. Qb2 Rc2 59. Qb3+ Nd5 60. Qxc2 dxc2) 58. Rf1 Nh3+ 59. Kg2 Nf4+ 60. Kg1 Ne2+ 61. Nxe2 Rxf1+ 62. Kxf1 Rf8+ 63. Kg2 Rf2+ {[%mdl 64] Double Attack, Pin.  Weighted Error Value: White=0.87/Black=0.67} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "15.4"]
[White "Nakamura, Hikaru"]
[Black "Shankland, Sam"]
[Result "0-1"]
[ECO "B67"]
[WhiteElo "2736"]
[BlackElo "2691"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,115,44,13,28,14,25,9,19,19,17,0,14,17,22,33,102,0,22,0,0,0,29,27,62,38,76,55,46,43,98,91,113,113,108,102,126,118,155,116,137,82,80,0,423,385,383,363,381,235,216,93,100,0,0,-17,-19,-44,-31,-25,-10,-562,-542,-689,-683,-643,-624,-889,-566,-563,-550,-831,-829,-793,-786,-1216,-1216,-5150,-967,-1027,-995,-1375,-1085,-1372,-1277,-1191,-1113,-937,-842,-1335,-1262,-2047,-937,-6043,-5214,-29975,-29976,-6408]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bg5 e6 7. Qd2 a6 8. O-O-O Bd7 9. f3 Nxd4 10. Qxd4 Be7 11. h4 Qc7 {B67: Sicilian: Richter-Rauzer: 7...a6 8 0-0-0 Bd7, lines without 9 f4 Be7.} 12. Qd2 b5 13. Kb1 b4 {The position is equal.} 14. Ne2 a5 15. c4 {[#]} bxc3 $146 ({Don't play} 15... Qxc4 $6 16. e5 $16) ({Predecessor:} 15... h6 16. Bxf6 Bxf6 17. Qxd6 Qa7 18. e5 Be7 19. Qd4 Qc7 20. Qf4 O-O 21. Nd4 a4 {½-½ (34) Nakamura,H (2736)-Dubov,D (2699) chess24.com INT 2020}) 16. Nxc3 {White wants to play Nb5.} Rb8 17. a4 h6 {[#]} (17... O-O $14) 18. Be3 (18. Nb5 $1 $16 {[%cal Rb5c7]} Qd8 19. Bf4) 18... O-O 19. Nb5 Qb7 20. Bd3 Rfc8 21. Rc1 $36 {[%mdl 2048] White fights for an advantage.} ({Much worse is} 21. Qxa5 Ra8 $17) 21... d5 {[%cal Rd5e4]} 22. e5 Bb4 23. Qf2 Ne8 24. Ba7 Rxc1+ ({Black should play} 24... Ra8 $14) 25. Rxc1 $16 Rc8 {[#]} 26. Rxc8 $1 Qxc8 27. h5 Kf8 28. g4 Qc6 29. Bb6 Bc8 30. Na7 (30. f4 $142) 30... Qxa4 31. Qe2 ({White should try} 31. Bc2 $16 Qd7 32. Nxc8 Qxc8 33. f4) 31... Qd7 {[%mdl 8192]} (31... Bb7 $11 {and Black stays safe.}) 32. Qc2 $18 {Threatens to win with Bb5.} Bb7 33. Bb5 Qe7 34. Qh7 {[%cal Rh7h8]} f6 35. Qh8+ (35. Bd3 $18 {is more deadly. Threatening mate with Qh8+.} fxe5 36. Qh8+ Kf7 37. Bg6+ Kf6 38. Bxe8) 35... Kf7 $16 36. Bd3 (36. f4 $16) 36... Qf8 $11 37. Qh7 {Hoping for Bd8.} fxe5 38. Bd8 {[%csl Gh5,Gh7][%cal Rd3g6]} e4 $1 {[%cal Re4d3]} 39. fxe4 Qd6 40. Bh4 {[%mdl 8192] [#]} (40. g5 $1 $11 {and White has nothing to worry.} Qxd8 41. Qg6+ Ke7 42. gxh6 gxh6 43. Qh7+ Kf6 44. Qh8+ Kg5 45. Qe5+ Kg4 46. Be2+ Kh3 47. Bf1+ Kg4 48. Be2+ Kh3 49. Bf1+ Kg4 50. Be2+) 40... dxe4 $1 $19 41. Bc2 Qa6 {Strongly threatening ...Bd5.} 42. g5 {g6+ would kill now.} hxg5 {aiming for ...Bd5.} 43. Bxg5 Qxa7 44. Qg6+ Kf8 45. h6 {And now Bc1 would win.} Qg1+ 46. Ka2 Bd5+ 47. b3 Qf2 48. Kb1 Bc3 {( -> ...Qg1+)} 49. Bc1 gxh6 50. Qxh6+ Kg8 51. Qg5+ Ng7 52. Qd8+ Qf8 53. Qc7 Bf6 54. Qxa5 Nf5 55. Ba3 Qc8 56. Bc5 Nd4 57. Bd1 Nxb3 58. Bxb3 {Black used his chance.  Weighted Error Value: White=0.89/Black=0.41} 0-1

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "15.5"]
[White "Vidit, Santosh Gujrathi"]
[Black "Bluebaum, Matthias"]
[Result "1/2-1/2"]
[ECO "D24"]
[WhiteElo "2726"]
[BlackElo "2670"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,99,29,46,39,47,35,58,54,60,20,33,29,30,25,30,0,0,34,68,79,83,89,106,50,64,28,98,87,97,34,156,118,120,125,171,183,185,175,143,127,174,122,164,144,135,130,104,43,74,35,104,106,89,72,94,85,105,24,82,97,73,72,114,21,33,21,18,21,19,33,41,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 dxc4 5. e4 b5 6. e5 {D24: Queen's Gambit Accepted: 3 Nf3 Nf6 4 Nc3.} Nd5 7. Nxb5 Nb6 8. Be2 {White is slightly better.} Nc6 9. a3 Be7 10. Be3 O-O 11. Qc2 Rb8 12. h4 {[#]} f5 $146 ({Predecessor:} 12... h6 13. Rd1 Ba6 14. Nc3 Nd5 15. Bc1 Nxc3 16. bxc3 Qd5 17. Rh3 f5 18. exf6 Rxf6 {½-½ (46) Sarana,A (2655)-Korobov,A (2679) Douglas 2019}) 13. exf6 gxf6 14. Nc3 Rf7 15. Rd1 Na5 16. Ne4 (16. h5 $16) 16... Bb7 $14 17. Rg1 Nd5 (17... Bc6 $11) 18. Bd2 $16 Nb3 19. Bh6 ({But not} 19. Qxc4 Nxd2 20. Nexd2 Nf4 $11) ({White should play} 19. Bxc4 $16 Nxd2 20. Rxd2) 19... Ba6 (19... c5 $14) 20. Bxc4 Bxc4 21. Qxc4 Bf8 22. Bxf8 Qxf8 23. Rd3 Na5 24. Qc2 Rb6 25. g3 (25. g4 $18) 25... Qe8 26. Nc5 Qb5 27. b3 Nb7 28. Nd2 ({Better is} 28. Kf1 $16) 28... Rc6 29. Qc4 Qb6 (29... Qxc4 $14 30. Nxc4 (30. bxc4 Nxc5 31. dxc5 Rxc5 $11) 30... Nxc5 31. dxc5 Rxc5) 30. b4 a5 {[%cal Ra5b4] [#]} 31. Rb3 {aiming for bxa5.} axb4 32. axb4 Nd6 33. Qd3 ({White should try} 33. Qe2 $16) 33... Re7 (33... Qb5 $11 {keeps the balance.}) 34. b5 Rxc5 35. dxc5 Qxc5 {[#] White must now prevent ...Qc1+.} 36. Ke2 (36. Rb1 $1 $16) 36... e5 $11 37. Ne4 Nxe4 38. Qxe4 {Hoping for Kf1.} Nc3+ {[#]} 39. Rxc3 $1 Qxc3 {[%mdl 4096] Endgame KQR-KQR} 40. Rd1 Qb2+ {The position is equal.} 41. Kf3 {Strongly threatening Qg4+.} Qxb5 42. Rd8+ Re8 43. Qg4+ Kh8 44. Rd7 {[%csl Gd7][%cal Rg4g7]} Qc6+ 45. Ke2 {[%csl Gd7][%cal Rg4g7]} Rg8 46. Qf5 {[%csl Gf5][%cal Rd7h7]} Rg7 47. Rd8+ Rg8 48. Rd7 {[%csl Gf5][%cal Rd7h7]} Rg7 49. Rd8+ Rg8 50. Rd7 {[%csl Gf5][%cal Rd7h7] Black escapes into a draw.  Weighted Error Value: White=0.21/Black=0.20} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "15.6"]
[White "Radjabov, Teimour"]
[Black "Aronian, Levon"]
[Result "1/2-1/2"]
[ECO "E46"]
[WhiteElo "2765"]
[BlackElo "2781"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,73,-12,-11,-12,-4,-14,-14,-10,-9,-18,-7,-41,-25,-20,-20,-18,-8,0,-7,-8,-8,-8,-8,-11,-12,-12,-6,-6,0,-11,-9,-8,0,-5,0,0,0,0,0,-4,0,0,0,-4,-4,-4,-4,-4,-4,-4,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 O-O 5. Nge2 Re8 6. a3 Bf8 7. Ng3 d5 8. Bd3 {E46: Nimzo-Indian: Rubinstein: 4 e3 0-0 5 Ne2 without early Bd3.} c5 9. dxc5 dxc4 10. Bxc4 Qxd1+ 11. Kxd1 Bxc5 12. Nge4 (12. Ke2 {looks sharper.} Be7 13. Rd1 a6 14. Nce4 Nbd7 15. a4) 12... Nxe4 13. Nxe4 Be7 {[#] The position is equal.} 14. Bd2 $146 ({Predecessor:} 14. Ke2 Bd7 15. Nc3 Rc8 16. Bd3 Na6 17. Bd2 Nc5 18. Bc2 Bc6 19. f3 Bf6 20. Rac1 a5 21. b4 axb4 22. axb4 Bxc3 23. Bxc3 Bb5+ 24. Kf2 Nd3+ {½-½ (24) Werle,J (2527)-Sadler,M (2684) Haarlem 2017}) 14... b6 15. Bc3 Bb7 16. Bd3 Rd8 17. Ke2 Na6 {Hoping for ...Rxd3!} 18. f3 f5 19. Nf2 Nc5 {Strongly threatening ...Rxd3!} 20. Bc4 Kf7 21. Nd3 Nxd3 22. Bxd3 Rac8 23. Rac1 Bf6 24. Bxf6 Kxf6 25. h4 g6 26. Rhd1 h6 27. Rxc8 Rxc8 $11 {[%mdl 4096] Endgame KRB-KRB} 28. Rd2 g5 29. hxg5+ hxg5 30. Rc2 Rxc2+ 31. Bxc2 {KB-KB} f4 32. Kf2 e5 33. g3 Bc6 34. Bd1 Bb7 35. Bc2 Bc6 36. Bd1 Bb7 37. Bc2 {A rather calm draw.  Weighted Error Value: White=0.03/Black=0.02} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "15.7"]
[White "Ding, Liren"]
[Black "So, Wesley"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2791"]
[BlackElo "2770"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,51,51,44,24,22,17,18,28,23,32,32,20,1,4,11,13,12,29,36,36,30,27,33,24,31,19,17,0,0,0,6,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 O-O 6. O-O d5 7. exd5 Nxd5 8. a4 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} a5 9. Nbd2 Nb6 10. Bb5 Bd6 11. Ne4 Bg4 12. h3 Bh5 13. Re1 Na7 14. d4 exd4 15. Nxd6 ({Much weaker is} 15. cxd4 Nxb5 16. axb5 Bb4 $15) 15... Qxd6 16. Qxd4 Nxb5 17. axb5 Qxd4 18. Nxd4 Bg6 {[#]} 19. f4 $146 {[#] Strongly threatening f5.} ({Predecessor:} 19. Bf4 Rfc8 20. Bg3 a4 21. Re7 Nc4 22. b3 axb3 23. Rxa8 Rxa8 24. Nxb3 Rc8 25. Rxc7 Rxc7 26. Bxc7 {½-½ (35) Nepomniachtchi,I (2784)-Leko,P (2663) chess24.com INT 2020}) 19... f5 {The position is equal.} 20. Re5 a4 21. Rc5 Rac8 22. Be3 Nd7 23. Rd5 Nb6 {[%cal Rb6d5]} 24. Rc5 Nd7 25. Rd5 Nb6 {[%cal Rb6d5]} 26. Rc5 {Weighted Error Value: White=0.04/Black=0.01} 1/2-1/2

[Event "Opera Euro Rapid Prelims 2021"]
[Site "Online"]
[Date "2021.02.03"]
[Round "15.8"]
[White "Carlsen, Magnus"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1/2-1/2"]
[ECO "D79"]
[WhiteElo "2862"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.02.02"]
[EventType "tourn"]
[EventCountry "NET"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,64,0,14,0,0,0,0,-8,0,-15,0,-37,-22,-22,-22,-22,-22,-19,-22,-54,-46,-50,-50,-50,-54,-45,-58,-65,-32,-69,-43,-69,-30,-38,-29,-29,-29,-29,-29,-29,-29,-29,0,-29,0,-29,0]} 1. d4 Nf6 2. c4 g6 3. g3 c6 4. Bg2 d5 5. cxd5 cxd5 6. Nf3 Bg7 7. Ne5 Ne4 8. Nd2 Nd7 9. Nxe4 dxe4 10. O-O O-O 11. Nxd7 {D79: Fianchetto Grünfeld: Symmetrical Variation (6 0-0 c6 7 cxd5 cxd5).} Bxd7 12. Bxe4 Bh3 13. Re1 {The position is equal.} Bxd4 {[#]} 14. Qb3 $146 ({Not} 14. Bxb7 $2 Qb6 $19) ({Predecessor:} 14. Bh6 Re8 15. Rb1 Qb6 16. e3 Bg7 17. Bxg7 Kxg7 18. Qf3 Rab8 19. Rbc1 Red8 20. Bd5 {0-1 (44) Jones,B (2228)-Adam,C (2310) ICCF email 2006}) 14... Be6 15. Qf3 Qb6 16. Be3 Bxe3 ({Wrong is} 16... Qxb2 $2 17. Rab1 $18) 17. Qxe3 Qxe3 18. fxe3 Rac8 19. Rac1 b6 20. a3 Rxc1 21. Rxc1 Rc8 22. Rxc8+ Bxc8 $15 {[%mdl 4096] Endgame KB-KB} 23. Kf2 Bd7 24. Bd5 e6 25. Bc4 Kf8 26. e4 e5 27. Ke3 f6 28. b4 g5 29. Bd3 Be8 30. Bc4 Bd7 31. Bd3 Be8 32. Bc4 Bd7 {Weighted Error Value: White=0.09/Black=0.09} 1/2-1/2

