[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {
1/2-1/2 (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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {
1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {
1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2
(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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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
{1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {
1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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+ {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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"]
[Tiebreak "Koya+Number of black wins+Number of wins"]
[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 {1/2-1/2 (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

