[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.16"]
[Round "1.1"]
[White "Carlsen, Magnus"]
[Black "Firouzja, Alireza"]
[Result "1-0"]
[ECO "D53"]
[WhiteElo "2862"]
[BlackElo "2749"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,79,14,13,17,17,17,17,15,16,10,16,25,24,19,10,20,8,13,14,13,20,15,27,
20,22,33,19,10,15,9,31,32,16,20,10,0,0,0,0,0,0,0,0,-1,2,-12,-16,-33,-27,-118,
-130,-133,-122,-126,-55,-70,-75,-128,-74,-62,1057,1057,898,863,29994,29995,
29995,29996,29996,29997]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Bg5 h6 6.
Bh4 Be7 7. cxd5 {D53: Queen's Gambit Declined: 4 Bg5 Be7: Early deviations.}
Nxd5 8. Bxe7 Qxe7 9. e4 {The position is equal.} Nxc3 10. bxc3 O-O 11. Bd3 c5
12. O-O cxd4 13. cxd4 b6 {[#]} 14. a4 $146 ({Predecessor:} 14. Rc1 Nf6 15. Qe2
Bb7 16. Rfd1 Rac8 17. h3 Rfd8 18. Rxc8 Rxc8 19. e5 {1-0 (35) Obolentseva,A 
(2324)-Girya,O (2456) Moscow 2019}) 14... Bb7 15. a5 bxa5 16. Rxa5 Nf6 17. Re1
Rfd8 18. Qa1 Qc7 19. h3 a6 20. Rc5 Qf4 {[%cal Rb7e4]} 21. Re5 Nd7 22. Ra5 Nf6 {
[%cal Rb7e4]} 23. d5 exd5 24. e5 Ne4 25. Qd4 Rdc8 26. Raa1 a5 27. Rab1 Bc6 28.
e6 fxe6 {Threatens to win with ...a4.} 29. Ne5 {Black must now prevent f3.} Qf6
30. f3 (30. Bxe4 $11 {remains equal.} dxe4 31. Nxc6 Rxc6 32. Qxe4) 30... Ng5 $1
$17 31. Rb6 Be8 32. Qe3 a4 (32... h5 $17 33. f4 Ne4 34. Bxe4 dxe4 35. Qxe4 a4)
33. Ng4 $1 $15 {[%cal Rg4f6]} Qd8 {Strongly threatening ...d4.} 34. Rxe6 ({
White should play} 34. f4 d4 35. Qe2 Qxb6 36. fxg5) 34... Nxe6 ({Better is} 
34... a3 $1 {...a2 is the strong threat.} 35. Re7 Bf7) 35. Qxe6+ $17 Bf7 $2 {
[%mdl 8192] This costs Black the game.} (35... Kh8 $15 36. Qf5 Qb6+ 37. Kf1 Bg6
$1 38. Qxg6 Qxg6 39. Bxg6 a3) 36. Nxh6+ $1 $18 gxh6 37. Qxh6 {Bh7+ would kill
now.} Qc7 38. Qh7+ {White mates.} Kf8 {[#]} 39. Qh8+ $1 Bg8 40. Qh6+ {Weighted
Error Value: White=0.07/Black=0.31} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.16"]
[Round "1.2"]
[White "Wojtaszek, Radoslaw"]
[Black "Anton Guijarro, David"]
[Result "1/2-1/2"]
[ECO "E15"]
[WhiteElo "2705"]
[BlackElo "2679"]
[Annotator "TA"]
[PlyCount "134"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,134,16,7,20,4,17,0,2,-16,29,22,22,19,20,20,19,31,25,20,82,72,81,55,
44,36,42,50,62,56,59,64,81,78,78,77,83,85,81,81,92,92,92,92,92,92,92,92,92,92,
92,92,92,92,92,92,92,92,92,92,92,92,92,51,51,51,51,41,41,41,41,41,41,41,42,41,
41,41,63,63,63,63,63,63,63,63,63,63,63,63,63,63,63,63,63,63,63,37,63,37,37,0,0,
0,49,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2
Be7 6. Bg2 Nbd7 7. Qc2 c6 8. O-O b6 9. Rd1 Ba6 10. b3 O-O 11. a4 h6 {E15:
Queen's Indian: 4 g3 sidelines, 4 g3 Ba6 and 4 g3 Bb7 early deviations.} 12. a5
Qc8 13. Na3 c5 14. Qb2 {[#]} bxa5 $146 ({Predecessor:} 14... Rd8 15. Rac1 Qb7
16. Nc2 Ne4 17. Be1 Rac8 18. Ne3 Ndf6 19. axb6 axb6 20. cxd5 Nxd5 {1/2-1/2 (40)
Bescos Anzano,M (2522)-Sokolov,V (2465) ICCF email 2009}) 15. Bxa5 Rb8 16. Qa2
dxc4 17. Nxc4 Bb7 $1 18. Rdc1 Bd5 19. Bd2 Ne4 (19... cxd4 $11 {remains equal.}
20. Nb6 Qb7 21. Nxd5 Nxd5) 20. Bf4 $16 ({Of course not} 20. Qxa7 Bf6 $15) 20...
Rb7 21. Nfd2 Nxd2 22. Bxd5 exd5 23. Nxd2 Qd8 24. Qa6 Qb6 25. Be3 Rfb8 26. Qd3
cxd4 27. Bxd4 Bc5 28. Bxc5 Nxc5 29. Qxd5 Nxb3 30. Nxb3 Qxb3 31. Qxb3 Rxb3 32.
Rxa7 Rb1 33. Rxb1 Rxb1+ {[%mdl 4096] Endgame KR-KR} 34. Kg2 h5 35. Kf3 g6 36.
h4 Kg7 37. e4 Rb3+ 38. Kf4 Rb2 39. f3 Rb4 40. Ra5 Kf6 41. g4 hxg4 42. Kxg4 Rb1
43. h5 Rg1+ 44. Kf4 gxh5 45. Rxh5 Ra1 46. Rh6+ Kg7 47. Rd6 Ra3 48. e5 Ra4+ 49.
Kf5 Ra3 50. f4 Ra5 51. Kg5 Rb5 52. Rd7 Ra5 53. Kg4 Kf8 54. Kf5 Kg7 55. Ke4 Kf8
56. f5 Ke8 57. Rc7 Ra1 58. Kf4 {[#] Strongly threatening Kg5.} Rg1 59. Rb7 f6
60. Rb8+ Ke7 61. Rb7+ Ke8 62. e6 Rf1+ $1 {The position is equal.} 63. Ke4 {
[#] Rf7 is the strong threat.} Re1+ 64. Kd5 {Threatens to win with Rf7.} Rd1+
65. Kc4 {aiming for Rf7.} Rc1+ $1 66. Kd3 {Hoping for Rf7.} Rd1+ $1 67. Kc4 {
Black must now prevent Rf7.} Rc1+ $1 {Weighted Error Value: White=0.05/Black=0.
06} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.16"]
[Round "1.3"]
[White "Harikrishna, Pentala"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2732"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "127"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,127,15,15,15,0,18,19,19,10,22,16,29,24,18,20,35,31,29,29,38,37,46,37,
37,39,88,50,95,57,85,85,89,87,84,62,58,58,53,64,64,61,68,65,68,68,66,64,69,0,
50,0,71,51,51,56,58,41,45,27,26,26,24,7,20,30,20,4,18,18,73,68,73,70,74,73,128,
128,128,128,128,128,128,128,129,129,129,129,136,136,136,136,136,136,136,136,
136,136,136,136,136,136,136,136,136,136,136,0,136,136,136,136]} 1. e4 c5 2. Nf3
d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 e5 7. Nf3 Be7 8. Bc4 O-O 9. O-O Be6
10. Bb3 b5 $1 {[%mdl 4] is now more promising than 10...Nc6. B90: Sicilian
Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 11. Re1 Qc7 12. Nh4
{[#]} Nbd7 $146 {The position is equal.} ({Predecessor:} 12... g6 13. Bh6 Re8
14. Re3 b4 15. Nd5 Nxd5 16. Bxd5 Bxd5 17. Qxd5 Qc6 18. Nf5 Qxd5 19. exd5 {
1/2-1/2 (28) Nisipeanu,L (2667)-Gopal,G (2578) Tegernsee 2018}) 13. Nf5 Bxf5
14. exf5 b4 15. Nd5 Nxd5 16. Bxd5 Rab8 17. Bb3 a5 18. Qf3 Nb6 19. Rad1 Bf6 20.
Bxb6 Rxb6 21. Rd5 Rc6 22. Red1 h6 23. Ba4 Rc4 24. Rxd6 Rf4 25. Qe2 Rxf5 26. g3
{Strongly threatening Qe4.} e4 27. Qxe4 Qc5 28. Qe2 Bxb2 29. Bb3 Bc3 30. R1d5
Rxd5 31. Rxd5 Qa7 32. Qd3 Be1 33. Qe2 (33. Qd4 {is interesting.} Qxd4 34. Rxd4
Kh7 35. Rd5 f5 36. Kf1) 33... Bc3 34. Qd3 Be1 $1 35. Qe3 Qxe3 36. fxe3 $14 {
[%mdl 4096] Endgame KRB-KRB} Re8 37. Rxa5 Kf8 38. Rf5 f6 39. Rf3 Bc3 40. h3 Be5
41. Kg2 Rd8 42. Rf2 Ke7 43. g4 Rd1 {[#]} (43... g5 $11 {remains equal.}) 44. c3
$1 $16 Rd3 45. cxb4 Rxe3 46. Rf3 Rxf3 ({Better is} 46... Re4) 47. Kxf3 {KB-KB}
Bc3 48. a3 {[%cal Ba2a3,Ba3a4][%mdl 32]} Bb2 49. a4 Bc3 50. b5 Kd6 51. Ke4 Kc5
52. Kf5 g5 53. Kg6 Kb6 54. Kxh6 Bb2 55. Kg6 Bc3 56. Kf5 Bd4 57. Bc2 Bb2 58. Ke6
Bc3 59. Kd5 Bd2 60. Bd3 Bc3 61. Ke6 Bb2 62. Kd5 Bc3 $1 63. Be2 Bd2 64. Ke4 {
Weighted Error Value: White=0.09/Black=0.07} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.16"]
[Round "1.4"]
[White "Esipenko, Andrey"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2677"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,60,36,34,13,19,10,11,19,25,14,28,30,27,27,24,0,0,0,5,0,18,10,8,0,4,2,
17,16,22,19,26,16,26,25,27,20,27,8,8,0,0,0,4,0,4,7,8]} 1. e4 e5 2. Nf3 Nf6 3.
Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bf5 7. O-O Be7 8. Re1 O-O 9. Nbd2 {[%cal
Rd2e4] C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} Nd6 $1 10.
Nf1 c6 11. Bf4 {[#] Threatens to win with Bxd6.} Bxd3 12. Qxd3 Nd7 {[#]} 13.
Qb3 $146 ({Predecessor:} 13. Ng3 Re8 14. h4 Nf8 15. h5 Ne6 16. Bd2 Ng5 17. Bxg5
Bxg5 18. Rxe8+ Nxe8 19. Qf5 {1-0 (52) Chittka,J (2319)-Fistoul,B (1938)
Dortmund 2019}) 13... Nb6 14. a4 Nbc4 15. Ne5 Nxe5 16. dxe5 Ne4 17. Ng3 Nxg3
18. Qxg3 {Bh6! is the strong threat.} Re8 19. Rad1 Qd7 20. c4 Bb4 21. Bh6 {
[%csl Gh6][%cal Rg3g7] [#]} Bf8 22. Be3 Qf5 23. cxd5 Rxe5 24. dxc6 $1 bxc6 25.
Rc1 Rae8 26. Red1 Qe4 {The position is equal.} 27. Qf4 Qxf4 $1 28. Bxf4 Re4 29.
Be3 Rxa4 30. Rxc6 Rb4 {A rather calm draw.  Weighted Error Value: White=0.05/
Black=0.03} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.16"]
[Round "1.5"]
[White "Grandelius, Nils"]
[Black "Donchenko, Alexander"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2663"]
[BlackElo "2668"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,93,16,31,14,25,16,24,8,8,8,8,10,10,2,11,17,22,22,37,31,50,47,45,35,
48,42,28,33,44,16,18,14,31,26,26,32,33,0,0,0,72,63,76,80,62,10,10,10,62,0,15,0,
58,16,16,16,16,25,75,55,55,54,75,88,85,73,73,79,278,264,1125,1129,1110,1026,
831,711,29977,29979,29978,29980,29980,29981,29980,29981]} 1. e4 e5 2. Nf3 Nc6
3. Bc4 Nf6 4. d3 Bc5 5. O-O d6 6. c3 a6 7. Re1 {C54: Giuoco Piano: 4 c3 Nf6,
main lines with 5 d4 and 5 d3.} Ba7 8. Nbd2 O-O 9. Nf1 {White has an edge.
seems to push 9.Bb3 aside.} Na5 10. Bb3 Nxb3 11. axb3 c6 12. Ng3 h6 13. h3 Be6
{[#]} 14. d4 $146 ({Predecessor:} 14. Be3 Bb8 15. b4 Bc7 16. Qd2 Kh7 17. c4 Re8
18. Rac1 a5 19. b5 a4 20. Qe2 {1-0 (51) Nurmanova,A (2026)-Mohammad Fahad,R 
(2319) chess.com INT 2020}) 14... Re8 15. Be3 d5 16. exd5 exd4 17. Bxd4 ({
Much weaker is} 17. dxe6 dxe3 18. exf7+ Kxf7 $15) 17... Qxd5 18. Bxf6 Qxd1 19.
Raxd1 {[#] aiming for Be5.} gxf6 20. b4 Red8 21. Ne4 Kg7 22. Nc5 Bxc5 23. bxc5
f5 24. Nd4 Kf6 $1 25. Ra1 a5 (25... Rd5 $11 {remains equal.}) 26. Ra4 $16 Rd5
27. b4 Ra6 28. Nxe6 (28. Rea1 $1 $14) 28... fxe6 $14 {[%mdl 4096] Endgame
KRR-KRR} 29. Rea1 Ke5 (29... e5 $11) 30. Re1+ (30. f4+ $5 Kf6 31. Rxa5 Rxa5 32.
Rxa5 $14) 30... Kf6 31. Rea1 Ke5 32. Rxa5 Rxa5 33. Rxa5 {KR-KR} Ke4 34. Ra7
Rd1+ 35. Kh2 Rd7 36. Ra1 $1 {[%cal Ra1e1] Threatens to win with Re1+.} Rd2 37.
Re1+ Kd3 38. Re3+ Kc4 39. f4 h5 $2 {A mistake that costs the game.} (39... Rf2
$16 {was called for.}) 40. Kg3 $18 ({Less strong is} 40. Rxe6 Kxc3 41. Re5 Kxb4
$16) 40... Rd3 $2 (40... Kb3 41. Rxe6 Kxc3) 41. Rxd3 Kxd3 {KP-KP} 42. Kh4 Ke3
43. g3 Kf2 44. g4 {White mates.} hxg4 45. hxg4 fxg4 46. Kxg4 Ke3 {[#]} 47. Kg5
$1 {Weighted Error Value: White=0.10/Black=0.38} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.16"]
[Round "1.6"]
[White "Caruana, Fabiano"]
[Black "Van Foreest, Jorden"]
[Result "1/2-1/2"]
[ECO "D40"]
[WhiteElo "2823"]
[BlackElo "2671"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,112,28,22,26,19,22,30,20,16,17,21,20,47,0,0,0,0,0,0,2,0,-3,-3,-7,14,
0,-11,-12,-8,0,-3,-18,-17,-22,5,4,5,0,0,0,50,41,46,42,60,8,10,13,10,4,5,5,5,5,
30,18,18,0,18,18,18,18,18,18,3,2,3,0,72,77,511,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-28000]} 1. c4 e6 2. Nc3 d5 3. d4 c5 4. e3 Nf6 5.
Nf3 a6 6. cxd5 exd5 7. g3 {D40: Queen's Gambit Declined: Semi-Tarrasch with 5
e3.} c4 8. Bg2 Bb4 {[#]} 9. Bd2 $146 {White has an edge.} ({Predecessor:} 9.
O-O O-O 10. Bd2 Nc6 11. b3 Bxc3 12. Bxc3 Ne4 13. Qe1 b5 14. bxc4 bxc4 15. Ne5
Nxe5 16. dxe5 {1-0 (38) Zhukova,N (2338)-Barrionuevo,P (2259) Chess.com INT
2020}) 9... O-O 10. b3 Bf5 11. O-O Bd3 12. Re1 Nc6 13. Ne5 Nxe5 14. dxe5 Bxc3
15. Bxc3 Ne4 16. Bb4 Re8 17. f3 {[#]} a5 $1 18. Ba3 (18. fxe4 axb4) 18... Nc3
19. Qd2 Nb5 20. Bb2 a4 21. f4 a3 22. Bc3 Qb6 23. Bb4 Red8 24. Rac1 Be4 25. Be7
Re8 {And now ...c3 would win.} 26. Bxe4 {[%mdl 64] Overworked Piece} dxe4 27.
bxc4 Rxe7 28. Qb4 ({White should play} 28. cxb5 $14 Qxb5 29. Qd4) 28... Rc7 $11
29. Qxb5 Qxb5 30. cxb5 Rac8 31. Rxc7 Rxc7 {[%mdl 4096] Endgame KR-KR} 32. Rd1 {
[%cal Rd1d8]} g5 (32... Kf8 {with more complications.} 33. Rd8+ Ke7 34. Rb8 Ke6
35. b6 Rc1+) 33. b6 Rc6 34. Rd8+ Kg7 35. Ra8 Rc1+ 36. Kg2 Rc2+ $1 37. Kh3 gxf4
$1 ({Much worse is} 37... Rxa2 $6 38. fxg5 h6 39. gxh6+ Kxh6 40. Kg4 $18) 38.
gxf4 Rxa2 39. Kg4 Rxh2 (39... Rg2+ $11 40. Kf5 a2) 40. Rxa3 $16 {aiming for
Ra7.} Rb2 $2 {[%mdl 8192] [#]} (40... Rg2+ $16 {is more resistant.} 41. Kf5 Rb2
) 41. f5 $2 (41. Ra8 $1 $18) 41... Rg2+ $1 $11 {The position is equal.} 42. Kf4
h5 $1 {[%csl Gh5][%cal Rg2g4]} 43. Kxe4 {Strongly threatening Ra8.} h4 $1 44.
Ra1 {Rh1 is the strong threat.} h3 $1 45. Kf3 Rb2 46. Rh1 h2 47. Kg3 Rb5 $1 48.
Kf4 Rb2 49. Kf3 Kh6 50. Kf4 Rf2+ 51. Kg4 Re2 52. Kf3 Rb2 53. Kg3 Kg5 54. e6 ({
Avoid the trap} 54. Rxh2 $2 Rxh2 55. Kxh2 Kxf5 $19) 54... fxe6 55. fxe6 {
Black must now prevent e7.} Rxb6 56. Rxh2 $2 {[%mdl 8192]} (56. e7 $11 Re6 {
[%mdl 64] Double Attack} 57. Kf3) 56... Rxe6 {[%mdl 32768] Black used his
chance.  Weighted Error Value: White=0.25/Black=0.23. An unexpected result.}
1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.16"]
[Round "1.7"]
[White "Giri, Anish"]
[Black "Tari, Aryan"]
[Result "1-0"]
[ECO "C65"]
[WhiteElo "2764"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,93,25,22,31,29,30,28,27,30,19,22,12,43,43,52,52,52,52,52,52,54,46,54,
56,58,52,52,54,59,38,57,38,38,38,52,37,59,44,79,79,79,38,38,38,69,66,63,73,98,
70,124,103,108,62,115,123,180,112,105,66,58,45,60,54,120,106,137,133,133,133,
187,208,198,182,278,278,428,278,455,453,946,930,1352,1335,29993,29994]} 1. e4
e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 Bc5 5. Bxc6 dxc6 6. O-O {C65: Ruy Lopez: Berlin
Defence (3...Nf6), unusual lines and 4 0-0 Bc5.} Bg4 7. h3 Bh5 8. g4 {White
has an edge.} Nxg4 9. hxg4 Bxg4 10. Be3 Be7 {[#] next ...f5 is good for Black.}
11. Kg2 $146 ({Predecessor:} 11. Kh1 f5 12. Rg1 h5 13. Nc3 f4 14. Bd2 g5 15.
Nb1 Bc5 16. Bc3 Bxf2 17. Nbd2 {1-0 (33) Nakamura,H (2736)-Carlsen,M (2863)
chess24.com INT 2020}) 11... f5 12. Qe1 Bxf3+ 13. Kxf3 f4 14. Bd2 g5 15. Bc3
Bf6 16. Nd2 Qe7 17. Rh1 h5 $1 18. Ke2 g4 19. f3 g3 20. Kf1 h4 {And now ...h3
would win.} 21. Rh3 a5 22. a4 $1 b6 23. Kg2 c5 24. Qb1 Kf7 25. b3 Rad8 26. Nc4
Kg6 27. Qb2 Rh5 28. Rah1 Rdh8 29. Qa1 Kg7 ({Better is} 29... Qg7 $14) 30. Bb2
$16 Kg6 31. Qb1 Rd8 (31... Qd8 $14) 32. Qe1 Kg7 (32... Bg7 $16 {was called for.
}) 33. Qa1 ({White should try} 33. Qc1 $18) 33... Rdh8 34. Na3 {[%cal Bc4a3,
Ba3b5,Bb5c3,Bc3e2][%mdl 32]} Kg6 35. Nb5 Bg7 36. Nc3 Qd8 {[#]} (36... Qd6 $14)
37. Ne2 $1 {Hoping for Nxf4+!} R8h7 38. Qe1 Qd6 39. Qc3 c6 (39... Bf6 $16 {
is a better defense.}) 40. Qc4 $18 Rh8 41. Ba3 Qf6 (41... Qd7 $142 42. Bc1 R5h6
) 42. Qa6 Rb8 (42... Qd8 $142 43. Qb7 R5h6) 43. Bc1 Bh6 $2 (43... Bf8 {keeps
fighting.} 44. Qa7 Bd6) 44. Qa7 Qd8 (44... Rg8 $142 45. Qxb6 Bf8 46. Qxa5 Be7)
45. Bb2 Qc8 46. Qe7 {[%mdl 64] Double Attack} Bf8 {[#]} 47. Nxf4+ $1 {[%mdl
512] Weighted Error Value: White=0.11/Black=0.43} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.17"]
[Round "2.1"]
[White "Anton Guijarro, David"]
[Black "Carlsen, Magnus"]
[Result "1/2-1/2"]
[ECO "B34"]
[WhiteElo "2679"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "137"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,137,18,8,12,6,16,9,8,0,0,0,0,-2,-8,-9,-11,-39,-39,-40,-39,-46,-40,
-38,-18,-30,-20,-39,0,0,-4,-12,0,-6,0,0,0,0,-7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-5,-5,-8,-8,-8,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,-83,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-28000,-28000,-28000,
-28000,-28000,-28000,-28000,-28000]} 1. e4 c5 2. Nf3 Nc6 3. Nc3 g6 4. d4 cxd4
5. Nxd4 Bg7 6. Be3 Nf6 7. Nb3 d6 {B34: Sicilian: Accelerated Dragon with 5 Nc3:
sidelines.} 8. f3 Be6 9. Qd2 d5 {[#] The position is equal.} 10. Bb5 $146 ({
Predecessor:} 10. exd5 Nxd5 11. Nxd5 Qxd5 12. Qxd5 Bxd5 13. O-O-O O-O-O 14. Be2
f5 15. c3 b6 16. Ba6+ {1/2-1/2 (44) Erdogan,A (1932)-Trubchaninov,T (2183)
Kallithea 2016}) 10... dxe4 11. Qxd8+ Rxd8 12. fxe4 Bd7 13. O-O-O Ng4 14. Bc5
Bxc3 15. bxc3 b6 16. Bg1 Nce5 17. Bd3 Ba4 18. Bd4 Nxd3+ 19. cxd3 Rxd4 20. cxd4
Nf2 21. Kd2 {[#] Black must now prevent Rc1.} Nxh1 (21... Kd7 {seems wilder.}
22. d5 f6 23. Rdf1 Nxh1 24. Rxh1 Rc8) 22. Rxh1 $11 {[%mdl 4096] Endgame KRB-KRN
} e6 23. Nc1 Ke7 24. Ne2 Bd7 25. a4 Rc8 26. Nc3 f5 27. Rb1 fxe4 28. dxe4 e5 29.
Kd3 exd4 30. Kxd4 Rc5 31. Nd5+ Kf7 32. Rf1+ Kg7 33. Nc3 Be6 34. Nb5 Rc2 35. Ke5
Bg8 (35... Bc4 {feels hotter.} 36. Rd1 Rxg2 37. Nxa7 Rxh2 38. Nc8 Rb2) 36. Rg1
a5 37. Nd6 Bb3 38. Rb1 Bxa4 39. Rxb6 Rxg2 40. h4 Rh2 41. Ra6 Rxh4 42. Rxa5 Bd1
(42... Bb3 {is more complex.} 43. Ra7+ Kh6 44. Ra3 Rh3 45. Ra1 Kh5) 43. Ra1 Rh1
44. Ne8+ Kh6 45. Nf6 Kg5 46. Ra7 h5 {With the idea ...Rf1.} 47. Nh7+ Kh6 {
White should prevent ...Rf1.} 48. Nf8 $1 Rf1 (48... Re1 {with more
complications.} 49. Rh7+ Kg5 50. Ne6+ Kh4 51. Nf4 Rg1) 49. Rh7+ Kg5 50. Ne6+
Kh4 51. Rg7 Rg1 52. Nd4 g5 53. Nf5+ Kh3 54. Ne3 Bf3 {[#] Strongly threatening .
..h4.} 55. Kf5 Kh4 {Hoping for ...Re1.} 56. Ke5 Bg4 57. Kd4 (57. Nf5+ $11 Bxf5
58. exf5) 57... Bh3 (57... Ra1 $17 58. Rg6 Ra4+ 59. Kd3 Bf3 60. Nf5+ Kg4 61.
Ne3+ Kg3 62. Rxg5+ Kf2) 58. e5 Ra1 59. Rg6 Ra4+ 60. Kd5 Ra5+ 61. Kd4 Ra8 (61...
Bc8 {is interesting.} 62. e6 g4 63. e7 Bd7 64. Nd5 Be8) 62. e6 Re8 63. Ke5 Bg4
64. Kd6 {White wants to play e7.} Rxe6+ $2 {[%mdl 8192]} 65. Rxe6 Bxe6 66. Kxe6
{Mate.} Kg3 67. Kf5 Kf3 68. Kxg5 Kxe3 69. Kxh5 {[%mdl 32768] Weighted Error
Value: White=0.04/Black=0.03. An unexpected result.} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.17"]
[Round "2.2"]
[White "Vachier-Lagrave, Maxime"]
[Black "Firouzja, Alireza"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2784"]
[BlackElo "2749"]
[Annotator "TA"]
[PlyCount "70"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,70,16,20,31,26,15,14,2,25,14,15,6,2,0,31,13,41,21,15,13,16,6,43,72,
71,76,79,63,73,47,74,65,119,117,132,95,126,123,144,112,102,105,115,86,81,58,66,
0,0,0,0,0,0,-10,0,-2,-2,-2,-5]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2
Ne7 6. O-O c5 {6...h6 is setting a new trend.} 7. c4 Nbc6 8. dxc5 {B12:
Caro-Kann: Advance Variation.} dxc4 9. Bxc4 Ng6 10. Be3 Be7 11. Bb5 O-O 12.
Bxc6 bxc6 {[#]} 13. Na3 $5 $146 {[%cal Bb1a3,Ba3c4,Bc4d6][%mdl 8] New and
interesting.} ({Predecessor:} 13. Qxd8 Rfxd8 14. Nbd2 Rd5 15. Nc4 Bd3 16. Rfc1
Bxc4 17. Rxc4 Nxe5 18. Nxe5 Rxe5 19. Rd1 {0-1 (80) Abdusattorov,N (2627)
-Kobalia,M (2614) chess.com INT 2020}) 13... Qb8 14. Nc4 Be4 (14... Rd8 $5 {
[%cal Rd8d1]} 15. Nd6 Qxb2 $11) 15. Nd6 $36 {[%mdl 2048] Black is under
pressure.} Bd5 16. b3 f6 17. exf6 Bxf6 18. Rc1 Qb4 19. Nc4 Be7 20. Ne1 Rad8 21.
Qe2 Qb8 22. Nd3 Rf5 (22... e5 $14) 23. f3 $16 Nh4 24. Rf2 Kh8 25. f4 Ng6 26.
Nce5 Nxe5 27. Nxe5 ({Much weaker is} 27. fxe5 $6 Be4 $11) 27... Qb4 28. Qc2 Kg8
29. Rd1 Bf6 30. Nc4 (30. Ng4 $14) 30... Bxc4 $11 {The position is equal.} 31.
bxc4 {Strongly threatening Rb1.} Rxd1+ 32. Qxd1 Be7 33. Qb3 Qe1+ 34. Rf1 {[#]}
Qxe3+ {[%mdl 64] Remove Defender} 35. Qxe3 Bxc5 {Weighted Error Value: White=0.
11/Black=0.09} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.17"]
[Round "2.3"]
[White "Donchenko, Alexander"]
[Black "Caruana, Fabiano"]
[Result "0-1"]
[ECO "D12"]
[WhiteElo "2668"]
[BlackElo "2823"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,64,27,31,34,17,43,26,23,21,17,9,20,0,0,0,0,0,0,0,-11,0,0,-17,0,-54,0,
-100,-39,-129,-167,-190,-171,-229,-159,-403,-409,-491,-485,-489,-511,-503,-500,
-525,-523,-491,-492,-921,-917,-1169,-1088,-5273,-3381,-2406,-1555]} 1. d4 d5 2.
c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 {D12: Slav Defence:
3 Nf3 Nf6 4 e3 Bf5.} 8. Bd2 Be7 9. Nxg6 hxg6 {White has an edge.} 10. Qc2 Nbd7
11. O-O-O a6 {[#]} 12. g4 $146 ({Predecessor:} 12. Be1 b5 13. c5 Qc8 14. g4 Bd8
15. h4 Bc7 16. Bd3 Qb7 17. h5 gxh5 18. g5 {1-0 (36) Adly,A (2637)-Ibrahimov,R 
(2518) Riadh 2017}) 12... dxc4 13. Bxc4 b5 14. Be2 c5 15. d5 Nxd5 16. Nxd5 exd5
17. f4 b4 18. e4 (18. Kb1 $11) 18... d4 ({Black should play} 18... c4 $15) 19.
e5 (19. Kb1 $11) 19... Nb6 $36 {[%mdl 2048] Black fights for an advantage.} ({
Better is} 19... c4 $17 {White must now prevent ...d3.} 20. Bxc4 Nb6) 20. e6 (
20. Qe4 $1 $15) 20... Qd5 $17 21. exf7+ {[#]} Kf8 $1 (21... Kxf7 22. Bd3 $17) (
21... Qxf7 22. b3 $11) 22. h4 (22. Qxg6 {was necessary.} Rb8 23. b3 (23. Bxa6
$2 Qxa2 24. Bb5 c4 $19)) 22... Qxa2 {And now ...b3 would win.} ({Stronger than
} 22... Qxf7 23. b3 $11) 23. Qxg6 $2 {[#] White does not recover from this.} (
23. Qb1 $17 {was worth a try.} Qxb1+ 24. Kxb1) 23... b3 $1 $19 {[%cal Bb4b3,
Bb3a2][%mdl 32]} 24. Be1 {[#]} (24. Qb1 c4) 24... c4 $1 {...c3! is the strong
threat.Black is clearly winning.} 25. Rxd4 {[#] Strongly threatening Bc3.} Na4
26. Qb1 {[#]} Ba3 $1 {[%cal Ra3b2][%mdl 512]} 27. Qxa2 (27. Bb4+ Bxb4) 27...
bxa2 28. Kc2 {[#]} Rb8 $1 29. Rd8+ (29. Bb4+ $142 Rxb4 30. Bxc4 Rxb2+ 31. Kd3)
29... Rxd8 30. bxa3 c3 31. Bg3 Rd2+ 32. Kb3 Nc5+ {Weighted Error Value:
White=0.78/Black=0.09} 0-1

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.17"]
[Round "2.4"]
[White "Duda, Jan-Krzysztof"]
[Black "Grandelius, Nils"]
[Result "0-1"]
[ECO "A30"]
[WhiteElo "2743"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "80"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,80,0,7,0,0,0,0,0,-3,0,0,-10,-12,-10,3,-32,-22,-43,-38,-38,-43,-55,-53,
-68,-62,-63,-63,-63,-50,-52,-52,-71,-79,-57,-81,-81,-62,-66,0,-235,-245,-250,
-246,-242,-246,-222,-236,-295,-278,-409,-430,-428,-424,-421,-415,-466,-462,
-448,-446,-412,-279,-421,-407,-391,-299,-468,-459,-436,-391,-520,-525,-604,
-508]} 1. c4 c5 2. Nf3 Nc6 3. b3 e5 4. Bb2 d6 5. Nc3 g6 6. g3 {A30:
Symmetrical English: Double Fianchetto and Hedgehog.} Bg7 7. Bg2 Nge7 8. O-O {
The position is equal.} O-O 9. d3 Rb8 10. Ne1 Be6 11. Nd5 Qd7 12. Nc2 Bh3 13.
Qd2 Bxg2 14. Kxg2 f5 15. b4 {[#]} f4 $146 ({Predecessor:} 15... cxb4 16. Ncxb4
b5 17. Nxc6 Nxc6 18. Bc3 Ne7 19. Nxe7+ Qxe7 20. Rab1 Qd7 21. Kg1 f4 22. Rxb5
Rxb5 23. cxb5 Qxb5 {1/2-1/2 (30) Xu,Y (2532)-Li,Y (2432) China 2019}) 16. bxc5
dxc5 17. e4 f3+ 18. Kh1 Nd4 19. Nxe7+ Qxe7 20. Ne3 Qd7 21. Bxd4 exd4 22. Nd5
Rbe8 {Strongly threatening ...Re5.} 23. Rg1 Qg4 (23... Rf7 $15) 24. Qd1 $2 {
[#] Black keeps a firm grip on the game.} (24. Qa5 $11 {and White has nothing
to worry.}) 24... Re5 $1 $19 {[%cal Re5h5] ...Rh5! is the strong threat.} 25.
Nf4 {[#]} g5 $1 {[%cal Rg5f4]} 26. h3 Qd7 27. Qxf3 Re7 (27... gxf4 28. gxf4 Re7
29. Rg4 $17) 28. Rg2 Qc7 {[%mdl 64] Pin} ({Not} 28... gxf4 29. gxf4 Kh8 30. Rg4
$17) 29. Qh5 (29. a4 $142) 29... gxf4 30. gxf4 Qxf4 31. Qxc5 Qh4 32. Rg3 Kh8
33. Rag1 b6 34. Qd5 Qf4 35. c5 (35. R1g2 {was the only defense.}) 35... bxc5
36. Qxc5 Qe5 37. Qc6 (37. Qxe5 $142 Bxe5 38. Rg5) 37... Ref7 ({Less strong is} 
37... Rc7 38. Qd5 $19) 38. Rg5 Qf4 39. e5 Qxf2 {Threatens to win with ...Qe3!}
({And not} 39... Bxe5 40. Qg2 $11) 40. Qe4 Re7 {Weighted Error Value: White=0.
39/Black=0.10} 0-1

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.17"]
[Round "2.5"]
[White "Van Foreest, Jorden"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2671"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,86,11,16,0,21,0,9,0,8,18,21,10,13,10,14,4,6,6,12,0,0,-12,-18,93,-21,
-22,0,0,0,-28,0,-6,-6,-6,-13,-8,-11,-11,-4,-16,-17,-18,-6,-8,-3,-51,-43,-33,-9,
-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-4,-14,12,12,12,
12,12]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7.
Bf4 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} Nc6 8. Bc4 Bf5
9. Qd2 Qd7 10. O-O-O Be6 11. Bxe6 {[#]} Qxe6 $146 ({Predecessor:} 11... fxe6
12. Rhe1 O-O 13. h4 a5 14. h5 h6 15. Bg3 a4 16. a3 Ra5 17. Qe2 Bf6 18. Qxe6+
Qxe6 19. Rxe6 Rxh5 20. Re4 b5 21. Rde1 Kf7 {1/2-1/2 (21) Blecha,M (2387)-Bucek,
J (2379) ICCF email 2009}) 12. Kb1 O-O-O 13. Nd4 (13. Rhe1 {is interesting.}
Qd7 14. Be3 Bf6 15. Qd5 Rhe8 16. h3) 13... Qd7 14. Nxc6 Qxc6 15. Qe3 Bf6 16.
Qxa7 Qxg2 17. Qa8+ Kd7 18. Qa4+ Kc8 19. Qa8+ Kd7 20. Qa4+ Kc8 (20... Qc6 {
with more complications.} 21. Qb3 Rhf8 22. Rhe1 Kc8 23. Bc1 b6) 21. Rhe1 Qc6
22. Qxc6 bxc6 23. c4 Kb7 24. c3 c5 25. Kc2 Ra8 26. Ra1 g5 27. Bd2 Rhg8 28. Re3
g4 $1 29. h3 h5 30. hxg4 {The position is equal.} hxg4 31. Rg3 Be5 32. f4 gxf3
33. Rxf3 f6 34. a3 Rg4 35. Kd3 c6 36. Raf1 d5 37. Bf4 dxc4+ 38. Kc2 Rd8 39.
Bxe5 fxe5 40. Rf7+ Kb6 41. Re7 Rf4 42. Rxf4 exf4 43. Rf7 Rh8 {Weighted Error
Value: White=0.04/Black=0.05} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.17"]
[Round "2.6"]
[White "Harikrishna, Pentala"]
[Black "Esipenko, Andrey"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2732"]
[BlackElo "2677"]
[Annotator "TA"]
[PlyCount "94"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,94,0,12,10,0,12,12,4,0,-6,16,9,14,0,22,0,0,0,6,-2,0,-18,0,-12,-14,-17,
0,0,0,-17,-5,-18,-11,-10,-10,-14,-14,-12,-10,-10,-10,-7,-9,-27,-21,-43,-35,-59,
-59,-46,-41,-46,-16,-24,0,-55,-22,-29,-24,-25,-25,-29,-10,-10,-8,-14,-10,-10,
-10,-31,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c6 2. d4 d5 3. e5 c5 4. Nf3
cxd4 5. Nxd4 Nc6 6. c4 {B12: Caro-Kann: Advance Variation.} e6 7. Nc3 Bb4 8.
Be2 Nge7 9. O-O dxc4 10. Nxc6 {[%csl Gc6][%cal Rd1d8] [#]} Qxd1 11. Rxd1 {
[%csl Gc6][%cal Rd1d8]} Nxc6 {[#]} 12. Nb5 $146 {Black must now prevent Nc7+.}
({Predecessor:} 12. f4) 12... O-O 13. Bf4 a6 14. Nc3 Bc5 15. Bf3 Rb8 16. Bxc6
bxc6 17. Rd2 Be7 18. Rad1 a5 19. Be3 f6 20. exf6 gxf6 21. Rd4 Rxb2 22. Rxc4 Rd8
23. Rxd8+ Bxd8 24. Rxc6 Bd7 25. Rd6 Rb7 26. h3 f5 27. Rd1 Be7 28. Bd4 Kf7 29.
Be5 Bc6 30. Ne2 Bd5 31. Nc3 Bc6 32. Ne2 a4 33. Rc1 $1 {[%cal Rc1c6]} Bd5 34.
Nc3 Ba3 35. Rd1 Bc6 36. Rd8 Bf8 37. Rc8 Bd7 38. Ra8 a3 39. Ra6 (39. h4 {
looks sharper.} h5 40. Kh2 Rb2 41. Ra7 Rd2 42. f3) 39... Bb5 (39... h5 {
seems wilder.} 40. Ra5 h4 41. Ra6 Be7 42. Ra8 Bc5) 40. Nxb5 {The position is
equal.} Rxb5 $11 {[%mdl 4096] Endgame KRB-KRB} 41. f4 h5 (41... Rd5 {keeps
more tension.} 42. Ra7+ Kg6 43. Ra8 Bc5+ 44. Kf1 Rd2) 42. Ra7+ Kg6 {[#] And
now ...Bc5+ would win.} 43. Kh2 (43. Ra8 {with more complications.} Be7 44.
Rg8+ Kf7 45. Rg7+ Kf8 46. Rh7) 43... Rd5 44. Ra6 Kf7 45. Ra7+ Kg6 46. Ra6 Kf7
47. Ra7+ Kg6 {Weighted Error Value: White=0.04/Black=0.06} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.17"]
[Round "2.7"]
[White "Tari, Aryan"]
[Black "Wojtaszek, Radoslaw"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "2625"]
[BlackElo "2705"]
[Annotator "TA"]
[PlyCount "136"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,136,6,5,5,27,10,25,19,24,17,27,24,24,24,22,25,42,37,23,11,17,18,43,30,
31,-8,-20,0,-12,-25,-23,-40,15,8,36,18,41,0,12,14,12,0,0,0,27,0,9,8,112,112,
112,112,108,110,110,110,109,103,103,103,116,118,117,103,110,103,103,110,110,95,
116,116,160,156,160,95,98,31,31,8,119,110,110,118,174,174,174,174,174,183,178,
178,179,113,113,113,113,113,113,56,63,56,56,56,56,56,56,56,56,56,56,8,8,8,8,8,
8,0,56,0,56,56,56,56,58,8,8,8,8]} 1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. a4 Ngf6 5.
Nc3 a6 6. Be2 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7.} b6 7.
d4 cxd4 8. Qxd4 {White has an edge.} e5 9. Qe3 Bb7 10. O-O Be7 11. Nd2 O-O 12.
Rd1 Qc7 13. b3 Nc5 14. Bb2 h6 15. b4 {[#]} Ne6 $146 ({Predecessor:} 15... Ncxe4
16. Ncxe4 Nxe4 17. Nxe4 Qxc2 18. Nc3 Bg5 19. Qh3 Qxb2 20. Rab1 Qa3 21. Bc4 Bc8
{1/2-1/2 (41) Wharrier,J (2399)-Mirkowski,P (2383) ICCF email 2017}) 16. Nc4
Nd7 17. a5 {[%cal Ra5b6]} b5 18. Nb6 Nxb6 19. axb6 Qb8 20. Qg3 Kh8 ({Black
should try} 20... Qd8 $15) 21. Bc1 $11 Bc6 22. Be3 Nf4 23. Bxf4 exf4 24. Qxf4
Qxb6 25. Nd5 $36 {[%mdl 2048] White fights for an advantage.} Bxd5 26. Rxd5 Qc6
27. Bd3 Qc3 28. Rb1 a5 (28... Kg8 $11 {remains equal.}) 29. bxa5 $16 ({Don't
play} 29. Rxb5 $6 a4 $11) 29... Rxa5 30. g3 Kg8 31. Rdxb5 Rxb5 32. Rxb5 Qc7 33.
h4 Bf6 34. Qf5 Be5 35. h5 Rb8 36. Rxb8+ Qxb8 37. Bc4 Qc7 38. Bd5 Bf6 39. c4 Bd4
40. Kg2 Bc3 41. f4 Bd4 42. Kh3 (42. g4 $142) 42... Kf8 43. g4 (43. Kg4 $16)
43... Qa7 $1 $14 {[%cal Ra7a3] [#] ( -> ...Qa3+)} 44. g5 {Hoping for Qc8+.}
hxg5 (44... g6 $1 $11 45. Qg4 (45. hxg6 {gets mated.} Qa3+ 46. Kh2 Qb2+ 47. Kh3
Qc3+ 48. Kh2 Qd2+ 49. Kh3 Qe3+ 50. Kh4 Qf2+ 51. Kh3 Qf1+ 52. Kh2 Bg1+ 53. Kg3
Bf2+ 54. Kf3 Be1+ 55. Kg4 Qg2+ 56. Kh5 Qh1+ 57. Kg4 h5#) 45... Qa3+ 46. Qg3
Qxg3+ 47. Kxg3 hxg5) 45. fxg5 $16 Be5 46. Kh4 {c5! is the strong threat.} Ke8 {
[#]} (46... Bc3 $16 {was necessary.} 47. c5 dxc5) 47. c5 $1 $18 {[%mdl 64]
Deflection} Qxc5 48. Qxf7+ Kd8 49. Be6 {[%csl Ge6][%cal Rf7d7]} Qc6 50. Bf5 Qb5
51. h6 (51. Qe6 $18 Kc7 52. h6 gxh6 53. gxh6) 51... gxh6 $16 52. gxh6 {
Strongly threatening h7.} Qe8 53. Qc4 Ke7 54. h7 (54. Qc7+ $16 Kf8 55. Kg4)
54... Qf7 $14 55. Qc1 Qf6+ 56. Kh3 Qg7 {[%csl Ge5][%cal Rg7g3]} 57. Qc7+ Ke8 {
[%csl Ge5][%cal Rg7g3]} 58. Qc8+ Ke7 {[%csl Ge5][%cal Rg7g3]} 59. Qd7+ Kf8 {
[%csl Ge5][%cal Rg7g3]} 60. Qd8+ Kf7 {[%csl Ge5][%cal Rg7g3]} 61. Qg8+ Ke7 62.
Qe6+ Kf8 {[%csl Ge5][%cal Rg7g3]} 63. Qc8+ Ke7 $1 {[%csl Ge5][%cal Rg7g3]} 64.
Qc7+ Ke8 {[%csl Ge5][%cal Rg7g3]} 65. Qb8+ Ke7 {[%csl Ge5][%cal Rg7g3]} 66.
Qa7+ Kf8 {[%csl Ge5][%cal Rg7g3]} 67. Qf2 Qh6+ 68. Kg4 {Black must now prevent
Bg6+.} Kg7 {White really could win this.  Weighted Error Value: White=0.10/
Black=0.11} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.18"]
[Round "3.1"]
[White "Carlsen, Magnus"]
[Black "Tari, Aryan"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2862"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,110,29,27,38,31,-7,30,35,31,30,30,30,33,27,27,27,25,20,15,15,16,14,
22,22,18,15,14,15,15,15,10,8,8,8,14,8,10,13,8,13,12,0,0,0,39,23,23,23,23,23,24,
24,24,20,25,21,25,25,23,25,35,17,33,17,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5.
cxd5 cxd4 6. Qxd4 exd5 7. e4 {D41: Queen's Gambit Declined: Semi-Tarrasch with
5 cxd5.} dxe4 $1 {[%mdl 4] is now more promising than 7...Nc6.} 8. Qxd8+ Kxd8
9. Ng5 {White has an edge.} Be6 10. Nxe6+ fxe6 11. Bg5 Nc6 12. O-O-O+ Ke8 13.
Bb5 Rc8 14. Kb1 {[#]} Bb4 $146 ({Predecessor:} 14... a6 15. Ba4 Be7 16. Bxf6
gxf6 17. Nxe4 Rg8 18. g3 f5 19. Bb3 Rg6 20. Nd6+ Bxd6 21. Rxd6 {1/2-1/2 (52)
Duda,J (2743)-Le,Q (2709) chess24.com INT 2020}) 15. Bxf6 gxf6 16. Nxe4 f5 17.
Ng5 Ke7 $1 18. a3 Ba5 19. f4 h6 20. Nf3 Rhd8 21. Rxd8 Nxd8 22. Rd1 Rc7 23. Ne5
a6 24. Be2 {Black should prevent Nc4.} Bb6 25. Ng6+ Ke8 26. Bh5 Nc6 27. g4 fxg4
28. Rd6 Kf7 29. f5 $1 Kf6 30. fxe6 Kg5 31. Rd5+ Kf6 32. Nf4 Be3 33. Ng2 Bg5 34.
Bxg4 {h4 is the strong threat.} Ne5 35. Bh3 h5 36. Ka2 Re7 37. Ne1 Bf4 {
The position is equal.} 38. Nf3 Nxf3 39. Rf5+ {[%mdl 64] [#] Double Attack} Kg6
{Hoping for ...Ng5.} 40. Rxf4 Nxh2 $11 {[%mdl 4096] Endgame KRB-KRN} 41. Kb3 {
next Kc4 is good for White.} Ng4 $1 42. Bxg4 hxg4 43. Rxg4+ {KR-KR} Kf5 44. Rb4
(44. Rc4 {feels hotter.} Kxe6 45. a4 Kd6 46. Rc3 Rc7 47. Rh3) 44... Kxe6 45.
Rb6+ Kf7 46. Kb4 Ke8 47. Rd6 Rd7 48. Kc5 (48. Rg6 {keeps more tension.} Kd8 49.
Rg3 Kc7 50. Ka5 Rd5+ 51. Ka4) 48... Rxd6 49. Kxd6 {[#] aiming for Kc7. KPP-KPP}
Kd8 50. b4 (50. a4 {is more complex.} Kc8 51. Kc5 Kc7 52. a5 Kd7 53. Kb6) 50...
Kc8 51. a4 {[%cal Ba3a4,Ba4b5,Bb5b6][%mdl 32]} (51. b5 {with more
complications.} axb5 52. Kc5 b4 53. axb4 Kc7 54. b5) 51... Kd8 52. b5 axb5 53.
axb5 Kc8 54. b6 $1 Kb8 55. Kd7 Ka8 56. Kc7 {Weighted Error Value: White=0.02/
Black=0.01} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.18"]
[Round "3.2"]
[White "Giri, Anish"]
[Black "Donchenko, Alexander"]
[Result "1/2-1/2"]
[ECO "E21"]
[WhiteElo "2764"]
[BlackElo "2668"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,84,10,11,14,9,10,10,17,0,0,0,0,0,0,-12,-16,-14,-10,-13,-2,-8,-6,-21,
-22,-40,-10,-13,0,-12,0,-25,-20,-11,0,-46,0,0,0,7,33,32,30,40,22,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,8,8,8,8,8,0,0,0,4,0,2]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3
O-O 5. Bd2 b6 6. e3 Bxc3 7. Bxc3 Ne4 8. Rc1 Bb7 9. Bd3 d6 {E21: Nimzo-Indian:
4 Nf3.} 10. O-O Nxc3 $1 {[%mdl 4] now scores much better than the old 10...Nd7.
} 11. Rxc3 Nd7 12. d5 e5 13. e4 a5 14. Bc2 Nc5 {[#]} 15. g3 $146 ({Predecessor:
} 15. Qd2 Bc8 16. Qe3 Bg4 17. Nd2 Bd7 18. g3 Qe7 19. Kg2 c6 20. dxc6 Bxc6 21.
f3 {0-1 (28) Reich,T (2373)-Istratescu,A (2583) Aschach 2017}) 15... c6 16.
dxc6 Bxc6 17. Qe2 Qe7 18. Qe3 g6 19. Re1 Rae8 20. b3 Kh8 21. Nh4 Rb8 22. a3 Ne6
23. b4 axb4 24. axb4 Nd4 25. Bd1 Ba8 26. Nf3 Ne6 27. Ra3 f5 28. exf5 Rxf5 29.
Nd2 Rf7 ({Of course not} 29... Qb7 $6 30. Bf3 $16) 30. f4 {The position is
equal.} Nd4 (30... Qb7 $2 31. Bf3 $18) 31. fxe5 dxe5 ({Avoid the trap} 31...
Qb7 $2 {[#]} 32. Rxa8 $1 {[%mdl 512]} Qxa8 33. Qxd4 $18) 32. Qxe5+ Qxe5 33.
Rxe5 Nc6 34. Re1 (34. Ree3 {feels hotter.} Nxb4 35. Reb3 Re7 36. Nf3 Rd8 37.
Ra1) 34... Nxb4 35. Nf3 Bxf3 36. Rxf3 Rxf3 37. Bxf3 $11 {[%mdl 4096] Endgame
KRB-KRN} b5 38. cxb5 Rxb5 39. Rb1 Rb8 40. Rd1 Rf8 41. Be4 Na6 42. Rc1 Rf7 {
Weighted Error Value: White=0.06/Black=0.05} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.18"]
[Round "3.3"]
[White "Wojtaszek, Radoslaw"]
[Black "Van Foreest, Jorden"]
[Result "1/2-1/2"]
[ECO "D50"]
[WhiteElo "2705"]
[BlackElo "2671"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,79,18,20,15,13,18,14,8,9,5,2,4,14,19,26,14,8,21,18,34,34,34,34,34,34,
35,27,33,39,61,60,119,42,66,45,47,48,41,42,45,41,49,14,43,41,45,31,36,36,28,34,
31,30,31,8,12,-18,-18,-18,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 e6 3. Nf3 Nf6 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. Rd1 Be6 10. Bd3 h6 11. Bh4 Nc6 12. Qa4 Qb6
13. Rd2 {[#]} Rfd8 $146 ({Predecessor:} 13... Rac8 14. O-O Na5 15. Ne5 Nc4 16.
Nxc4 dxc4 17. Bb1 Rfd8 18. Rfd1 Rxd2 19. Rxd2 g5 {1-0 (36) Avetisyan,M (2079)
-Golub,N (1870) Prague 2016}) 14. O-O Rac8 15. h3 a6 16. Rc1 Kf8 17. Bb1 Na5
18. Qd4 Qxd4 19. Nxd4 ({Reject} 19. exd4 g5 $15) 19... Nc4 20. Rdc2 b5 21. Nce2
Bd7 22. b3 Ne5 (22... Na3 $14) 23. Rxc8 ({White should try} 23. Rc7 $16) 23...
Rxc8 $14 24. Rxc8+ (24. Rd1 {seems wilder.} Rc5 25. Bxf6 Bxf6 26. Nf4 Be7 27.
b4) 24... Bxc8 25. Bg3 Ng6 26. f3 Bc5 27. Kf2 Ne7 28. Nc1 Ba3 29. Nd3 Nf5 30.
Nc2 Nxg3 31. Nxa3 Nh1+ 32. Ke1 Ng3 33. Nc2 Ke7 34. Nd4 Nf5 {The position is
equal.} 35. Nf4 Nxd4 36. exd4 b4 37. g4 a5 38. Bd3 Kd6 39. h4 Bd7 40. Kd2 {
Weighted Error Value: White=0.06/Black=0.05} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.18"]
[Round "3.4"]
[White "Caruana, Fabiano"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2823"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "101"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,101,14,20,17,14,11,19,22,25,-22,-4,-17,-27,-45,-24,-40,0,-29,71,35,
67,74,169,166,160,166,162,161,166,171,168,154,168,161,172,160,177,168,156,170,
180,187,180,193,191,199,188,169,154,0,0,0,154,162,164,160,161,168,161,145,148,
154,139,102,109,112,109,111,97,6,6,6,20,20,20,20,20,20,20,20,20,20,20,0,0,0,18,
0,0,0]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. Nc3 Nxc3 6. dxc3 Be7 7.
Be3 Nd7 8. Qd2 {C42: Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} O-O
9. O-O-O Nf6 {seems to push 9...Ne5 aside.} 10. Bd3 c5 {[#]} 11. Rhg1 $1 $146 {
[%mdl 8] An important novelty.} ({Predecessor:} 11. Rhe1 Be6 12. a3 c4 13. Bf1
Ne4 14. Qe2 d5 15. Bd4 b5 16. Nd2 Nd6 17. g3 {1/2-1/2 (85) Caruana,F (2823)
-Duda,J (2743) Chess.com INT 2020}) 11... b5 12. g4 Bb7 13. Qe2 c4 14. Bf5 Re8
15. Nd4 Nd5 {[#]} (15... g6 $11) 16. Ne6 $1 $36 {[%cal Re6d8][%mdl 2048] White
is more active.} Qa5 {[#]} 17. Qf3 $1 Bf6 {[#]} (17... Qxa2 $2 18. Bxh7+ $1 {
[%mdl 512]} Kxh7 19. Qxf7 $18) (17... g6 $16 {was necessary.} 18. Rxd5 Qxa2) (
17... g6 18. Rxd5) 18. g5 $1 $18 Bxc3 {[#]} 19. Bxh7+ $1 {[%mdl 512]} Kxh7 20.
g6+ $1 (20. Qxf7 Qxa2 21. bxc3 (21. g6+ Kh8 $17) 21... Qa3+ 22. Kd2 Qxc3+ 23.
Kc1 Qa1+ 24. Kd2 Qc3+ 25. Kc1 Qa3+ 26. Kd2 Qc3+ $17) 20... fxg6 21. Ng5+ Kh8
22. Bd4 $1 Bxd4 23. Rxd4 {White threatens Rh4+ and mate.} Nf6 (23... Re1+ $2
24. Rxe1 Qxe1+ 25. Rd1 $18) 24. Qxb7 {Hoping for Rh4+.} Rab8 {[#]} ({Avoid the
trap} 24... Qxa2 $2 25. Rh4+ Nh5 26. Ne6 $1 $18 {[%mdl 512]}) 25. Qf7 ({And not
} 25. Rh4+ Nh5 $11) 25... Re1+ 26. Rd1 Rxg1 27. Rxg1 Re8 {( -> ...Re1+)} ({
Don't go for} 27... Qxa2 $2 28. Rg3 $18) 28. Ne6 Rxe6 29. Qxe6 Qxa2 {[%mdl
4096] Endgame ...Qa1+ is the strong threat. KQR-KQN} 30. Qh3+ Kg8 31. Qe6+ $2 (
31. Qa3 $16 Qxa3 32. bxa3) 31... Kh7 $11 {aiming for ...Qa1+.} 32. Qh3+ $2 (32.
Re1 $11) 32... Kg8 $16 33. Qa3 Qxa3 34. bxa3 $18 {KR-KN} Kf7 35. Kd2 {[%mdl
1024] White has strong compensation.} a6 36. Ke3 Nd5+ 37. Kd4 Ne7 38. Re1 Ke8
39. a4 {And now axb5 would win.} Kd7 40. axb5 axb5 41. Rg1 (41. Kc3 $16) 41...
Kc6 $1 $11 {The position is equal.} 42. h4 Nf5+ 43. Kc3 Nxh4 44. Kb4 Nf3 45.
Rxg6 Nd4 $1 46. c3 Ne2 47. Rxg7 Nf4 48. Ka5 Ne2 49. Kb4 Nf4 50. Ka5 Ne2 51. Kb4
{Black escapes into a draw.  Weighted Error Value: White=0.12/Black=0.08}
1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.18"]
[Round "3.5"]
[White "Grandelius, Nils"]
[Black "Harikrishna, Pentala"]
[Result "0-1"]
[ECO "C02"]
[WhiteElo "2663"]
[BlackElo "2732"]
[Annotator "TA"]
[PlyCount "76"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,76,6,0,15,13,23,0,53,58,47,25,25,21,28,13,20,0,0,-27,-20,-17,-28,-26,
-18,-25,-25,-39,-37,-32,-22,-34,-21,-86,-86,-86,-86,-86,-86,-119,-115,-121,
-117,-261,-247,-315,-310,-577,-569,-561,-559,-543,-516,-524,-500,-454,-441,
-459,-470,-828,-820]} 1. e4 e6 2. d4 d5 3. e5 c5 4. c3 Qb6 5. Nf3 Bd7 6. Be2
cxd4 7. cxd4 Bb5 8. O-O Bxe2 9. Qxe2 Nc6 10. Nc3 Nge7 {C02: French: Advance
Variation.} 11. Qd3 Rc8 $5 {[%mdl 4] [#] A promising side line.} 12. Rd1 $146 (
{Predecessor:} 12. Bg5 Ng6 13. Qb5 Qxb5 14. Nxb5 a6 15. Nc3 h6 16. Bd2 Bb4 17.
a3 Bxc3 18. Bxc3 O-O 19. Rac1 {0-1 (49) Huerga,J (2253)-Dyakov,A (2250) IECG
email 2001}) 12... h6 (12... Nb4 $11 13. Qb5+ Qxb5 14. Nxb5 Nec6) 13. Bd2 $14
Ng6 14. h4 Bb4 ({Wrong is} 14... Qxb2 $2 15. h5 $18) 15. Na4 Qc7 16. h5 Nge7
17. Bf4 Qa5 18. b3 {[#] Strongly threatening a3.} b5 19. Nb2 Ba3 20. Qe2 O-O
21. Rab1 Rc7 22. Nd3 Qb6 23. b4 {Black must now prevent Rb3.} a5 ({Stronger
than} 23... Nxd4 24. Nxd4 Qxd4 25. Be3 $16) 24. bxa5 Nxa5 25. Bc1 (25. Nde1 $11
{keeps the balance.}) 25... Bxc1 $17 26. Rdxc1 Rxc1+ 27. Nxc1 Nc4 28. Nb3 Ra8
29. Rc1 Nc6 30. g3 {Loses the game.} (30. Ra1 $17) 30... Ra3 $19 31. Kg2 Qa7
32. Rc2 $2 (32. Qd3 {is a better defense.}) 32... Nb4 {[%mdl 64] Double Attack.
Black is clearly winning.} 33. Rc3 Nxa2 34. Rd3 {[#]} Rxb3 $1 {[%mdl 576]
Remove Defender, Decoy} 35. Rxb3 Nc1 $1 {[%csl LRb3,LRe2][%mdl 64] Double
Attack} 36. Qc2 Nxb3 37. Qxb3 Qa4 38. Qb1 (38. Qxa4 $142 bxa4 39. Ne1) 38... b4
{Weighted Error Value: White=0.41/Black=0.06} 0-1

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.18"]
[Round "3.6"]
[White "Esipenko, Andrey"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1/2-1/2"]
[ECO "B53"]
[WhiteElo "2677"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,65,7,14,8,8,15,0,7,25,9,14,16,16,9,20,12,22,-27,-16,-19,-25,-22,-14,
-14,-13,-23,-16,-15,-24,-10,-19,-11,-14,-25,-20,-43,-38,-27,-41,-78,-34,-78,0,
-95,0,-71,-68,-78,-38,-38,0,-73,0,-49,0,-56,0,-51]} 1. e4 c5 2. Nf3 d6 3. d4
cxd4 4. Qxd4 Nc6 5. Qe3 Nf6 6. Be2 {B53: Sicilian: 2...d6: Lines with Qxd4.} g6
7. O-O Bg7 8. Rd1 O-O 9. Nc3 {[#]} Be6 $146 ({Predecessor:} 9... Ng4 10. Qg5
Bf6 11. Qf4 Qb6 12. Qg3 Bxc3 13. bxc3 Qc5 14. Rb1 Qxc3 15. Bb2 Qxc2 {1-0 (55)
Druska,J (2443)-Martinovic,S (2563) Slovakia 2019}) 10. Nd5 Rc8 11. c3 Re8 12.
Qf4 Qa5 {[%cal Re6d5]} 13. Qh4 (13. Ng5 {keeps more tension.} Bxd5 14. exd5 Ne5
15. Qh4 Qb6 16. Nf3) 13... Nxd5 14. exd5 Bxd5 15. b4 Bxf3 16. bxa5 Bxe2 17. Rd5
Bxc3 18. Rb1 {[#]} Nb4 $1 {[%mdl 64] Double Attack} 19. Rd4 Bxd4 20. Qxd4 {
[%mdl 64] Strongly threatening Bh6. Double Attack} Nc6 21. Qd5 Ba6 22. Bg5 Ne5
23. Be3 Rc3 24. Rb3 Rc2 25. Rb1 Rc3 26. Rb3 Rc2 27. Rb1 Rec8 28. h3 R2c3 {
[#] Hoping for ...Rd3.} 29. Rb3 Rc2 30. Rb4 (30. Rb1 $11) 30... R2c3 31. Rb3 $1
Rc2 32. Rb4 ({White should play} 32. Rb1 $11) 32... R2c3 33. Rb3 $1 {Weighted
Error Value: White=0.14/Black=0.19} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.18"]
[Round "3.7"]
[White "Firouzja, Alireza"]
[Black "Anton Guijarro, David"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2749"]
[BlackElo "2679"]
[Annotator "TA"]
[PlyCount "121"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,121,-6,0,6,10,0,13,0,0,0,0,0,14,0,0,0,0,0,0,0,15,14,22,20,20,22,22,28,
35,22,43,31,32,15,26,26,26,26,26,26,45,40,56,53,53,33,60,34,41,41,46,41,51,49,
49,0,56,0,61,46,44,45,45,0,0,0,0,0,0,13,27,0,82,68,77,77,108,122,131,127,167,
160,135,158,126,93,89,93,93,93,154,182,321,323,530,522,518,503,455,449,426,420,
877,877,879,881,870,862,862,862,854,846,752,743]} 1. d4 Nf6 2. Nf3 d5 3. Bf4 c5
4. e3 Nc6 5. Nbd2 cxd4 6. exd4 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...
Nf6 3 g3 and 2...Nf6 3 Bf4.} Bf5 {6...Qb6 is the modern continuation.} 7. Bb5
Rc8 8. c3 {The position is equal.} e6 {[#]} 9. Qe2 $146 ({Predecessor:} 9. Qa4
Qb6 10. Bxc6+ bxc6 11. b4 Bd3 12. Ne5 Bb5 13. Qb3 Bd6 14. Nxf7 Bxf4 15. Nxh8 {
0-1 (35) Montoya Quintero,S-De la Hoz Paternina,F (1362) Antioquia 2020}) 9...
Nd7 10. h4 a6 11. Bd3 {[#] Strongly threatening Bxf5.} Bxd3 12. Qxd3 Be7 13.
Kf1 Qb6 14. Rb1 Qb5 15. Qxb5 axb5 16. a3 h5 17. Nb3 f6 18. Re1 Kf7 19. Nc1 Nf8
20. Nd3 Ng6 21. Bg3 Na5 22. Kg1 Nc4 23. Re2 Rhe8 24. Kh2 Bf8 25. Rhe1 b6 26.
Kg1 Ra8 27. Bf4 Rac8 28. g3 Rc6 29. Kg2 Be7 30. Ng1 Bf8 31. Nh3 Be7 32. Ng1 Bf8
$1 33. Nf3 Be7 34. Kh3 Ra8 35. Bc1 Re8 36. g4 hxg4+ 37. Kxg4 Rh8 38. h5 $36 {
[%mdl 2048] Black is under pressure.} Nf8 39. Nf4 Bd8 $1 40. Rh1 Rg8 (40... Bc7
$11 {keeps the balance.}) 41. Nh4 $16 Bc7 42. Nfg6 Nd7 43. Rhe1 Re8 44. Bf4
Bxf4 45. Nxf4 Rd6 46. Kh3 Nf8 47. Nfg6 Nh7 48. f4 Rdd8 49. Rg1 Nd6 (49... Rd7
$142) 50. Reg2 {White threatens Ne5+! and mate.} Rg8 {[#]} (50... Kg8 $142 51.
Ne5 Ng5+ 52. Kh2 (52. fxg5 fxe5 53. dxe5 Nb7 $16) 52... Nf5) 51. Ne7 $1 $18 {
[%mdl 512]} Ng5+ $2 (51... Rde8) 52. fxg5 Kxe7 53. gxf6+ Kxf6 54. Rg6+ Kf7 55.
Nf3 Rdf8 (55... Rde8 $142 56. Ng5+ Ke7 57. Nxe6 Kd7) 56. Ne5+ {White is
clearly winning.} Ke7 57. Rxg7+ Rxg7 58. Rxg7+ Kf6 59. h6 {Nd7+ is the strong
threat.} Rh8 60. Kg4 {[%cal Re5d7]} Rxh6 61. Rd7 {Weighted Error Value:
White=0.06/Black=0.14} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.19"]
[Round "4.1"]
[White "Van Foreest, Jorden"]
[Black "Carlsen, Magnus"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "2671"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "116"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,116,18,32,17,21,3,11,2,10,-7,-13,-12,-13,-8,-10,-13,-6,-2,-10,-18,0,
-29,-29,-35,-12,-12,-12,-11,-11,-8,-8,-12,-8,-9,-16,-13,-9,-21,-5,-14,-7,-90,
-87,-92,-102,-102,-102,-102,-102,-102,-102,-102,-99,-109,-109,-109,-109,-109,
-109,-109,-83,-109,-96,-109,-96,-109,-109,-109,-109,-109,-109,-109,-109,-109,
-102,-102,-102,-102,-102,-116,-116,-116,-14,-15,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bb7 7. d3
Be7 $1 {The main line 7...Be7 scores better than 7...Bc5.} 8. Nc3 O-O 9. a3 {
C84: Closed Ruy Lopez: Unusual White 6th moves.} Nd4 10. Nxd4 exd4 11. Ne2 c5 {
[#]} 12. Bg5 $146 ({Predecessor:} 12. Ng3 d5 13. e5 Nd7 14. f4 Re8 15. Qf3 Rb8
16. Bd2 c4 17. Ba2 Bf8 18. Rae1 {0-1 (56) Tabatabaei,M (2635)-Puranik,A (2580)
Sitges 2019}) 12... d5 13. Bxf6 Bxf6 14. Bxd5 Bxd5 15. exd5 Qxd5 16. Ng3 c4 17.
Re1 Rae8 18. a4 Rxe1+ 19. Qxe1 cxd3 20. cxd3 bxa4 21. Qd1 Qb5 22. Ne4 Be7 23.
Qc2 Rb8 24. Rxa4 Qxb2 $40 {[%mdl 128] Black mounts an attack.} (24... h6 {
with more complications.} 25. h3 Bb4 26. Ra1 Rb6 27. Nd2 Bxd2 28. Qxd2 Qxb2 29.
Qxb2 Rxb2 30. Kf1 Rb6) 25. Qxb2 Rxb2 $11 {[%cal Rb2b1][%mdl 4096] [#] Endgame
KRB-KRN} 26. g4 Rb6 27. Rxd4 Kf8 28. Rd7 {[#]} (28. Rc4 $11 Rb8 29. Ra4) 28...
Rg6 $1 $17 29. Kf1 Rxg4 30. Ra7 {Ra8+ is the strong threat.} f5 31. Ng3 g6 32.
Rxa6 Rh4 33. Kg2 Rd4 34. Ne2 Rxd3 35. Ng1 Rd7 36. Nf3 Kg7 37. h3 Bf6 38. Kg3
Rb7 39. Kg2 Re7 40. Ra5 Rc7 41. Rd5 Ra7 42. Rb5 Be7 43. Nd4 Rd7 44. Nf3 Rd6 45.
Rb7 Kf6 46. Ra7 h6 47. Nh4 Bd8 48. Rh7 Rd2 (48... Kg5 $17 49. Nf3+ Kh5) 49.
Rxh6 $11 {The position is equal.} Kg7 50. Rxg6+ Kh7 51. Nf3 Rxf2+ 52. Kxf2 Kxg6
{KB-KN} 53. Kg2 Kh5 54. Nd4 f4 55. Ne6 Bg5 56. Nxg5 Kxg5 57. Kf3 Kh4 58. Kxf4
Kxh3 {Weighted Error Value: White=0.07/Black=0.07} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.19"]
[Round "4.2"]
[White "Vachier-Lagrave, Maxime"]
[Black "Anton Guijarro, David"]
[Result "1/2-1/2"]
[ECO "C89"]
[WhiteElo "2784"]
[BlackElo "2679"]
[Annotator "TA"]
[PlyCount "159"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 31,159,58,56,20,22,22,22,17,16,12,14,-11,13,0,0,0,-4,-31,-16,-20,-21,
-25,0,0,0,0,-9,-31,0,0,0,-1,0,0,12,12,8,9,18,8,35,44,31,8,4,16,50,18,25,0,8,0,
0,0,6,0,34,18,28,18,43,47,42,44,73,50,58,58,51,58,60,64,72,72,72,41,41,41,41,
41,41,41,41,41,41,41,41,41,41,0,41,41,41,41,52,18,18,8,11,11,18,18,18,18,18,18,
25,25,28,25,25,32,39,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3.
Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. Re1 b5 7. Bb3 O-O 8. c3 d5 9. exd5 Nxd5 10.
Nxe5 Nxe5 11. Rxe5 c6 12. Re1 Bd6 13. d3 Qh4 14. g3 Qh3 15. Re4 Qf5 {15...Nf6
is more advanced technology.} 16. Nd2 {[%cal Bb1d2,Bd2f3,Bf3h4][%mdl 32]} Qg6
17. Nf3 {C89: Closed Ruy Lopez: Marshall Attack.} Bg4 $1 18. h3 Bxh3 19. Nh4 $1
{[%cal Rh4g6]} Qf6 20. Qh5 g6 {[#]} 21. Qe2 $146 ({Of course not} 21. Nxg6 fxg6
22. Qxh3 Qxf2+ 23. Kh1 Bxg3 $17) ({Predecessor:} 21. Qg5 Qg7 22. Qh6 Rfe8 23.
Qxg7+ Kxg7 24. Bd2 Rxe4 25. dxe4 Nf6 26. Re1 Re8 27. Bc2 {0-1 (54) Jobava,B 
(2658)-Sammour Hasbun,J (2463) ICC INT 2008}) 21... Qg7 22. Be3 Nxe3 23. Qxe3
Qf6 24. Re1 Kg7 25. g4 {aiming for g5.} Qxh4 26. g5 {[#]} Bf4 $1 27. Qxf4 Qxf4
28. Rxf4 Bf5 29. Re7 c5 30. Bd5 Rae8 31. Rc7 Re5 32. c4 h6 33. gxh6+ Kxh6 34.
Rf3 Re2 35. Rxc5 Rxb2 36. Rc6 {Strongly threatening Rxf5.} Kg5 37. Rxa6 bxc4
38. Bxc4 Rb1+ 39. Kg2 Bc8 40. Ra5+ f5 41. Rg3+ Kf6 42. d4 Rc1 43. Be2 Re1 44.
Ba6 f4 45. Rf3 Bf5 46. Rxf4 {Hoping for Bd3.} Ra8 47. d5 $1 Ke5 48. Rfa4 (48.
Rb4 {is interesting.} Rb1 49. Rba4 Rab8 50. d6+ Kxd6 51. Bd3) 48... Rb8 {
Threatening ...Be4+.} 49. d6+ Kxd6 {[#]} 50. Bd3 $1 {[%mdl 64] Decoy} Bxd3 51.
Rd4+ {[%mdl 64] Double Attack} Ke6 52. Rxd3 $16 {[%mdl 4096] Endgame KRR-KRR}
Rb6 53. Rg3 Kf6 54. Rf3+ Kg7 55. Ra7+ Kh6 56. Rh3+ Kg5 57. Rf7 {f4+ would kill
now.} (57. Rg3+ {is more complex.} Kf6 58. Rf3+ Kg5 59. Ra5+ Kh6 60. Re3) 57...
Re2 58. Ra3 Rc2 59. Kg3 {f4+ is the strong threat.} Rb1 60. Kg2 (60. Ra5+ {
keeps more tension.} Kh6 61. Rf3 Ra1 62. a3 Rg1+ 63. Kh2) 60... Rb6 61. Ra5+
Kh6 62. Ra8 Kg5 63. a4 {next a5 is good for White.} (63. Kg3 {seems wilder.}
Rc3+ 64. Rf3 Rc1 65. Kg2 Rc2 66. Rg3+) 63... Ra2 64. Ra5+ Kh6 65. Rf4 Rc6 66.
Rh4+ Kg7 67. Kg3 Ra3+ 68. f3 Rd6 69. Ra7+ Kf6 70. Rb4 Kg5 71. Ra8 Rc6 72. a5
Kh6 {The position is equal.} 73. Rh4+ Kg5 74. Rf4 Rd6 75. Rf7 Rc6 76. Rb8 {
And now Rb5+ would win.} Ra6 77. Rb6 R3xa5 78. f4+ Kh6 79. Rbb7 {[%csl Gb7]
[%cal Rf7h7]} g5 80. Kg4 {Weighted Error Value: White=0.08/Black=0.06} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.19"]
[Round "4.3"]
[White "Duda, Jan-Krzysztof"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "D87"]
[WhiteElo "2743"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 19,77,22,13,27,24,8,15,7,46,22,22,8,8,10,14,8,5,0,1,0,4,13,10,12,16,13,
11,0,36,29,33,32,25,20,43,27,31,21,21,22,23,23,26,21,46,42,50,47,46,21,21,8,13,
18,41,21,30,21,21,21]} 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 {is now debated instead of
10...Qc7.} 11. dxc5 {D87: Exchange Grünfeld: Classical Line: Variations
without ...cxd4.} Qc7 12. Nd4 {Black must now prevent Nxc6.} Ne5 {[#]} 13. Nb5
$1 Qb8 14. Be2 bxc5 15. Bxc5 a6 16. Na3 Qc7 17. Bd4 Rd8 18. Qc1 Ng4 19. Bxg4
Bxg4 20. Qe3 {[#]} Rac8 $146 ({Predecessor:} 20... Rab8 21. Bxg7 Kxg7 22. Nc2
Rbc8 23. Qg5 Be2 24. Rfe1 h6 25. Qc1 Bd3 26. Nb4 Qxc3 27. Qxc3+ Rxc3 28. Nxd3
Rcxd3 {1/2-1/2 (66) Bacrot,E (2714)-Vachier Lagrave,M (2719) Biel 2013}) 21. e5
Qc6 22. Nc2 Bf5 23. Nb4 Qe4 24. Qxe4 Bxe4 25. Rfe1 Bb7 26. Rab1 e6 27. Nd3 Bd5
28. Nc5 Bf8 29. Nxa6 Bxa2 30. Rb6 Bc4 31. h3 (31. Nb4 {with more complications.
} h5 32. Ra1 Rb8 33. Rxb8 Rxb8 34. Nc6) 31... Bxa6 32. Rxa6 Bc5 33. Ra4 Bxd4
34. cxd4 $14 {KRR-KRR} Rc2 35. g3 Rd2 36. Re4 Rd7 37. Kg2 Kg7 38. h4 h6 39. Kf3
{Weighted Error Value: White=0.04/Black=0.04} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.19"]
[Round "4.4"]
[White "Esipenko, Andrey"]
[Black "Grandelius, Nils"]
[Result "1/2-1/2"]
[ECO "B92"]
[WhiteElo "2677"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,88,26,11,10,0,16,-16,-13,-14,-13,-19,-14,-10,-6,-24,-27,-66,-34,-49,
-34,-70,-65,-96,-67,-77,-86,-98,-54,-100,-106,-93,-79,-123,-103,-139,-147,-127,
-56,-69,-73,-96,-99,-104,-104,-114,-117,-120,-118,-125,-61,-84,-33,-45,-25,-47,
-25,-33,-13,-28,-33,-36,-29,-95,-119,-165,0,-86,-56,-47,-56,-63,0,0,0]} 1. e4
c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e5 7. Nb3 Be6 8. f4 Be7 {
was the old line (8...exf4).} 9. O-O O-O {B92: Sicilian Najdorf: 6 Be2.} 10.
Kh1 Re8 {[#]} 11. Qd3 $146 ({Predecessor:} 11. f5 Bd7 12. Bf3 Bc6 13. g4 h6 14.
g5 hxg5 15. Bxg5 Nxe4 16. Bxe4 Bxg5 17. Rg1 {1/2-1/2 (44) Vozda,J (2451)
-Hladecek,M (2412) ICCF email 2011}) 11... b5 12. Nd5 Nc6 13. c3 exf4 14. Bxf4
Ne5 15. Nxe7+ Qxe7 16. Qc2 Qb7 17. Nd2 Rac8 18. Bg5 Nfd7 19. Rf2 d5 20. exd5
Bxd5 21. Rg1 Re6 ({Stronger than} 21... Bxa2 22. b3 $16) 22. Nf1 h6 23. Bf4 Nf6
24. Ne3 Be4 25. Qd1 Ng6 26. Bg3 Bc6 ({Black should try} 26... Qe7 $17 27. Ng4
Ne8) 27. Nf5 $15 Ne4 28. Rff1 Nxg3+ 29. hxg3 Qc7 {aiming for ...Rd8.} 30. Qd4 {
[%csl Gf5][%cal Rd4g7] [#]} Re5 $1 31. Bg4 Rd8 32. Qf2 Rdd5 (32... Bd5 $17 33.
Ra1 Be6) 33. Rd1 Qd8 (33... Ne7 $17 {[%cal Re5f5] Hoping for ...Rxf5.} 34.
Nxe7+ Qxe7) 34. Rgf1 Qg5 {[#] Strongly threatening ...Rxf5.} 35. Rd4 f6 36. Bh3
Bd7 {[%cal Re5f5]} 37. Rxd5 Rxd5 38. Qf3 Rd2 39. Qa8+ (39. b3 $11) 39... Kh7
$17 40. Qe4 Kh8 $2 (40... Rxb2 $19 41. c4 bxc4 42. Qxc4 a5) 41. Nh4 (41. Qa8+
$11 {remains equal.} Kh7 42. b4) 41... Ne5 42. Qa8+ Kh7 {White must now
prevent ...Bxh3.} 43. Qe4+ Kh8 (43... Kg8 $1 $15 44. Qa8+ Kf7) 44. Qa8+ $1 $11
Kh7 {Weighted Error Value: White=0.18/Black=0.23} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.19"]
[Round "4.5"]
[White "Harikrishna, Pentala"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "C78"]
[WhiteElo "2732"]
[BlackElo "2823"]
[Annotator "TA"]
[PlyCount "88"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,88,33,34,0,0,0,18,0,0,-21,-28,-22,19,0,30,29,33,28,26,20,22,-22,0,
-35,-27,-20,-27,-8,-11,-58,-49,-46,-16,-19,-9,-26,-19,-19,-14,-16,0,-4,-2,-11,
0,-79,-86,-81,-87,-85,-78,-97,-44,-45,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O b5 6. Bb3 Bc5 7. a4 Rb8 8. c3
d6 9. d4 Bb6 10. a5 {C78: Ruy Lopez: Archangelsk and Möller Defences.} (10.
axb5 axb5 11. Na3 O-O 12. Nxb5 Bg4 13. Bc2 exd4 14. Nbxd4 Nxd4 15. cxd4 Bxf3
16. gxf3 Nh5 17. Kh1 Qf6 18. Be3 Nf4 19. Ra4 Ne6 20. Rg1 Ra8 21. Rb4 Ba7 22.
Rc4 Bb6 23. Rb4 Ba7 24. f4 c5 25. e5 {1/2-1/2 (132) Harikrishna,P (2706)
-Caruana,F (2782) Wijk aan Zee 2014 CBM 159 [Szabo,Kr]}) 10... Ba7 (10... Bxa5
$2 11. dxe5 (11. d5 Ne7 $18) 11... dxe5 12. Qxd8+ Kxd8 13. Bd5 $18 (13. Bxf7
Bb6 $16)) 11. h3 Bb7 12. Re1 O-O 13. Be3 exd4 ({Of course not} 13... Nxe4 $6
14. d5 $16) 14. cxd4 {With the idea d5.} Ne7 $1 {[%mdl 4] is more profitable
than 14...Nb4 at the moment.} ({Not} 14... Nxe4 15. d5 $18) 15. Nbd2 Ng6 ({
Much worse is} 15... Nxe4 $6 16. Nxe4 Bxe4 17. Bg5 $16) 16. d5 Bxe3 17. Rxe3 c6
18. dxc6 Bxc6 {[#]} 19. Bc2 $146 ({Predecessor:} 19. Nd4 Bb7 20. Nf5 Re8 21.
Qf3 Bc8 22. Nd4 Bb7 23. Nf5 Bc8 24. Ng3 Be6 25. Bxe6 Rxe6 {1/2-1/2 (75)
Kobalia,M (2637)-Ragger,M (2572) Rijeka 2010}) 19... Re8 20. Re1 Bb7 21. b4 Nh5
22. Ra3 Nhf4 23. Nf1 Qf6 24. Ng3 Rbd8 25. Rae3 Ne5 26. Bb3 g6 27. Nh2 $1 h5 {
And now ...d5 would win.} 28. Ne2 Nc4 29. Bxc4 bxc4 30. Nxf4 Qxf4 31. Qc2 {[#]}
(31. Nf3 $11 {keeps the balance.}) 31... d5 $1 $17 {[%cal Rd5d4]} 32. exd5 Rxe3
33. Rxe3 Bxd5 34. Nf3 Be6 (34... Bxf3 $17 35. Rxf3 Qb8) 35. Ne5 $15 Qd4 (35...
Rd6 {feels hotter.} 36. Nf3 Qf5 37. Qxf5 Bxf5 38. Ne5 Be6) 36. Nxg6 $1 {
The position is equal.} Qd1+ 37. Qxd1 Rxd1+ $11 {[%mdl 4096] Endgame KRB-KRN}
38. Kh2 c3 39. Rxc3 {Hoping for Nf4.} fxg6 {KRB-KR} 40. Rc6 {[%mdl 64] [#]
Double Attack} Kf7 {...Rb1 is the strong threat.} 41. Rxa6 Rd2 42. Kg1 Rd1+ 43.
Kh2 Rd2 44. Kg1 Rd1+ {Weighted Error Value: White=0.12/Black=0.07} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.19"]
[Round "4.6"]
[White "Donchenko, Alexander"]
[Black "Wojtaszek, Radoslaw"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2668"]
[BlackElo "2705"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,99,15,4,20,23,31,22,30,29,35,29,29,14,20,5,32,17,40,12,22,20,14,22,9,
8,51,26,27,0,4,0,18,0,0,0,0,0,0,2,2,0,9,9,9,9,81,81,88,0,52,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3
d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. h3 e5 7. Nde2 h5 {B90: Sicilian Najdorf:
Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 8. g3 Be7 9. Bg2 b5 10. Nd5
Nxd5 11. Qxd5 Ra7 12. Be3 Rb7 {[#]} 13. g4 $146 ({Predecessor:} 13. a3 Qc7 14.
Qd2 Nd7 15. Nc3 Nf6 16. Bg5 Be6 17. f4 Ng8 18. h4 f6 19. f5 fxg5 20. fxe6 {
1/2-1/2 (41) Alekseenko,K (2668)-Sarana,A (2655) Izhevsk 2019}) 13... h4 14. f4
Nd7 15. f5 Nb6 16. Qc6+ Qd7 17. Qxd7+ Bxd7 18. b3 g5 19. O-O-O f6 20. Bd2 Bc6
21. Bb4 Rd7 22. Nc3 Kf7 23. Rd2 Ra8 {[#] Hoping for ...a5.} 24. Rhd1 a5 25.
Bxd6 b4 26. Bxe7 Rxd2 27. Rxd2 Kxe7 28. Nd1 Rd8 (28... Nc8 $11 {remains equal.}
) 29. Rxd8 $16 Kxd8 {[%mdl 4096] Endgame [#] KBN-KBN} 30. Nf2 (30. Ne3 $1 $16)
30... Ke7 ({Better is} 30... Nc8 $11) 31. Kb2 (31. c3 $14) 31... Kd6 $11 {
The position is equal.} 32. a3 bxa3+ 33. Kxa3 Kc5 34. c3 $1 Bb5 35. Nd1 Be2 36.
Ne3 Bd3 37. Kb2 a4 $1 38. Ka3 axb3 39. Kxb3 Nc4 40. Nxc4 Bxc4+ {KB-KB} 41. Kc2
Kb5 42. Kd2 $1 Ka4 43. Bf3 Kb3 {White must now prevent ...Bf1.} (43... Bf1 $5)
44. Bd1+ Kb2 {Threatening ...Bf1.} (44... Ka3 $5) 45. Bc2 Ka3 {Threatens to
win with ...Bf1.} (45... Bf1 46. Bd3 $18) 46. Bd3 Ba2 47. Bb5 Bb1 48. Bd3 Ba2
49. Bb5 Bb1 50. Bd3 {Weighted Error Value: White=0.07/Black=0.09} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.19"]
[Round "4.7"]
[White "Tari, Aryan"]
[Black "Firouzja, Alireza"]
[Result "1/2-1/2"]
[ECO "B12"]
[WhiteElo "2625"]
[BlackElo "2749"]
[Annotator "TA"]
[PlyCount "59"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,59,26,23,29,38,34,42,47,48,41,34,21,34,22,45,0,0,0,0,0,0,0,26,21,36,
27,52,47,84,-12,0,0,0,0,0,-78,0,-92,-94,-145,-32,-101,-99,-85,-16,-14,212,-493,
-485,-488,41,45]} 1. e4 c6 2. d4 d5 3. e5 Bf5 4. Nf3 e6 5. Be2 Ne7 6. c3 {
B12: Caro-Kann: Advance Variation.} Ng6 7. O-O Nd7 8. Ne1 h5 9. Be3 Qb6 10. b3
{[#]} f6 $146 ({Predecessor:} 10... h4 11. Nd3 c5 12. dxc5 Qc7 13. b4 Ngxe5 14.
Nxe5 Qxe5 15. Bd4 Qc7 16. c4 dxc4 17. Bxc4 h3 18. g3 Qc6 19. f3 {1/2-1/2 (19)
Khairullin,I (2543)-Grigoriants,S (2582) Moscow 2006}) 11. Bxh5 fxe5 12. g4
Rxh5 13. gxh5 Nf4 14. dxe5 Nh3+ 15. Kg2 c5 (15... Bc5 $5 {[%cal Rc5e3]} 16. Nc2
Nxe5 $14) 16. f4 Qc6 17. Nf3 O-O-O 18. Nbd2 Nb6 {Black wants to play ...d4.}
19. Qe1 (19. Kg3 $1 $16 {Nh4 is the strong threat.} d4 20. cxd4) 19... Be7 20.
Rc1 d4 21. cxd4 {aiming for Nc4.} Nd5 22. Nc4 (22. dxc5 $2 Bh4 $1 $19 {[%mdl
512]}) (22. Kh1 $11) 22... Ndxf4+ (22... Nhxf4+ $17 23. Kg1 Bd3 24. Nd6+ Bxd6
25. Bxf4 Nxf4 26. exd6 Ne2+ {[%mdl 64] Double Attack} 27. Kg2 Nxd4) 23. Bxf4 (
23. Kh1 $11 {remains equal.}) 23... Nxf4+ $17 24. Kg1 (24. Kg3 $142 Nxh5+ 25.
Kf2) 24... Bg4 ({Better is} 24... Rxd4 $17 25. Nd6+ Bxd6 26. exd6 Nh3+ 27. Kh1
Be4) 25. Rc3 (25. Qe3 $15 Bg5 26. d5 (26. Nd6+ Rxd6 27. Rxc5 Nh3+ {[%mdl 64]
Discovered Attack} 28. Kg2 Bxe3 $17) 26... Qxd5 27. Rcd1 (27. Nd6+ Kb8 $17)
27... Nh3+ {[%mdl 64] Discovered Attack} 28. Kg2 Bxe3 29. Rxd5 Nf4+ 30. Kg3
Nxd5 31. Kxg4) 25... Rxd4 26. Nd6+ Kb8 (26... Kd7 $1 $17 {White must now
prevent ...Nh3+.} 27. h4 Bxh5) 27. Qe3 $11 Bg5 $2 28. Rxc5 $4 {[%mdl 8192]}
Qxc5 $19 29. Nxg5 {[#] And now Nge4 would win.} Ne2+ $2 ({Black should try} 
29... Be2 $1 $19 {( -> ...Rd1)} 30. Re1 {[#]} (30. Rxf4 $2 Rd1+ {[%mdl 64]
Discovered Attack} 31. Kf2 Rf1+ 32. Kxe2 Re1+ {[%mdl 64] Skewer, Deflection}
33. Kxe1 Qxe3+ 34. Kd1 Qxf4 $19 {[%mdl 64] Double Attack}) 30... Rd1 $1 {
[%mdl 576] Discovered Attack} 31. Qxc5 Rxe1+ 32. Kf2 Nd3+ {[%mdl 64] Double
Attack} 33. Ke3 Nxc5) 30. Kg2 {Weighted Error Value: White=0.54/Black=0.53}
1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.21"]
[Round "5.1"]
[White "Carlsen, Magnus"]
[Black "Donchenko, Alexander"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2862"]
[BlackElo "2668"]
[Annotator "TA"]
[PlyCount "137"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,137,18,26,10,10,10,14,13,16,20,10,15,19,7,16,22,35,33,39,9,0,4,6,0,
36,33,32,25,25,25,30,25,32,20,35,0,0,0,0,0,0,0,0,0,0,0,24,0,9,10,23,0,0,0,22,0,
0,0,41,0,0,0,0,0,90,0,0,0,0,-1,9,0,9,9,13,9,13,16,24,24,16,18,15,16,17,16,70,
70,70,70,66,43,40,0,0,0,0,0,0,0,9,9,9,0,9,0,0,0,0,0,0,0,0,0,0,-8,-8,-8,-8,-8,
-8,-8,-8,-8,-8,-8]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3
e5 7. Nb3 Be6 8. h3 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4
and 6 Be3 e5.} Nc6 9. Qf3 Rc8 10. O-O-O Na5 11. Bg5 Be7 12. Bxf6 Bxf6 13. Nd5 {
[#]} Bg5+ $146 ({Predecessor:} 13... b5 14. Nxa5 Qxa5 15. Kb1 O-O 16. Be2 Bd8
17. c3 Rb8 18. h4 Qa4 19. Rd2 a5 {1/2-1/2 (42) Roubaud,D (2559)-Jonsson,D 
(2550) ICCF email 2016}) 14. Kb1 h5 15. Be2 h4 16. Nxa5 Qxa5 17. Qb3 Qc5 18.
Bg4 Qc4 ({Wrong is} 18... Qxf2 $2 19. Bxe6 fxe6 20. Nb6 $18) 19. Bxe6 fxe6 20.
Nb6 Qxb3 21. axb3 Rc6 22. Nc4 Ke7 23. Rd3 Rf8 24. f3 Bf4 25. Rhd1 {[%cal Rc4d6]
} Rd8 26. c3 Rd7 27. Kc2 Rd8 28. Na5 Rc7 29. b4 Rdd7 (29... b6 $5 30. Nb3 $8 g5
$11) 30. Kb3 Rd8 31. Nc4 {[%cal Rc4d6]} Rc6 32. Na3 d5 33. b5 Rcd6 34. bxa6
bxa6 35. Ka4 Rb8 36. b4 {[%cal Re4d5]} (36. Nc4 $5 {[%cal Rc4d6]} Rc6 37. Na5
$11) 36... Rc6 37. Kb3 Rbc8 38. Ra1 Rc4 39. Ra2 (39. exd5 $16 exd5 40. Nb1)
39... a5 $11 40. bxa5 Rb8+ 41. Kc2 $132 {[%mdl 2048] White puts up resistance}
Rc5 42. Nb1 Rbb5 43. exd5 exd5 44. a6 Ra5 $1 {[%cal Ra5a2]} 45. Rxa5 Rxa5 {
[%mdl 4096] Endgame KRB-KRN} 46. c4 $1 Rxa6 47. cxd5 Ra2+ 48. Kb3 Rxg2 49. Nc3
Rg3 (49... Kd7 $11) 50. d6+ Kd7 51. Ne4 Rxh3 52. Kc4 {[#] Threatens to win
with Kd5.} (52. Nc5+ {is more complex.} Kc6 53. d7 Bg5 54. Ne6 Be7 55. Kc4)
52... Rh1 $1 {[%cal Rh1c1] aiming for ...Rc1+.} 53. Kd5 {Nc5+ is the strong
threat.} (53. Nc5+ {with more complications.} Kc6 54. d7 Rc1+ 55. Kb3 Bg5 56.
Ne6) 53... Rc1 {Strongly threatening ...h3.The position is equal.} 54. Nc5+ Ke8
55. Ke6 Rxc5 {KRB-KR} 56. Ra3 {White wants to mate with Ra8+.} Rc8 57. d7+ {
[%mdl 64] [#] Double Attack} Kd8 58. dxc8=Q+ Kxc8 {KR-KB} 59. Ra1 h3 60. Rh1 h2
61. Kf5 g5 62. Kg4 Kd7 63. Kh3 Ke6 64. Kg2 Kf5 65. Kh3 e4 66. fxe4+ Kxe4 67.
Kg4 Ke3 68. Rxh2 Bxh2 69. Kxg5 {Weighted Error Value: White=0.08/Black=0.11}
1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.21"]
[Round "5.2"]
[White "Firouzja, Alireza"]
[Black "Van Foreest, Jorden"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2749"]
[BlackElo "2671"]
[Annotator "TA"]
[PlyCount "105"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,105,20,46,10,20,12,12,0,27,16,17,25,26,16,19,15,20,13,15,11,36,0,13,
13,6,16,8,0,7,0,1,-16,0,-50,0,-3,0,0,0,0,0,0,0,0,0,0,44,0,11,0,6,0,0,-16,0,0,
13,0,23,14,17,14,14,13,17,17,21,16,17,16,15,19,20,15,15,15,15,20,27,27,27,7,20,
3,3,4,4,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. Nf3 Nf6 3. g3 Bf5 4. c4 e6 5. Nc3
Nbd7 {[#]} 6. Nh4 $146 {D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3
and 2...Nf6 3 Bf4.} ({Predecessor:} 6. Bg2 c6 7. cxd5 exd5 8. O-O Bd6 9. Re1
O-O 10. Nh4 Be6 11. Qd3 c5 12. dxc5 Nxc5 13. Qd4 Ncd7 14. Nxd5 Nxd5 15. Bxd5
Bc5 16. Qc4 Rc8 {0-1 (25) Hellwege,W (1845)-Poeltelt,H (1711) Radebeul 2019})
6... dxc4 7. Nxf5 exf5 8. Qa4 Bd6 9. Qxc4 O-O 10. Bg2 c6 11. Qd3 g6 12. O-O Re8
13. Rb1 Nb6 14. b4 a6 15. a3 Qd7 16. Bg5 Nfd5 17. Nxd5 Nxd5 18. Rbe1 Bc7 19.
Bd2 h5 20. Bg5 Kg7 21. Rc1 Bd8 (21... h4 {with more complications.} 22. Bxh4 f6
23. Bh3 Qf7 24. e3 Rad8) 22. Bd2 Bf6 23. e3 h4 24. a4 Nc7 25. Rfd1 Rad8 26. Be1
Rh8 27. Qb3 Qe6 28. Rd3 Rd7 29. Rb1 Rhd8 30. Qc2 Rh8 31. Rdd1 Rhd8 32. Qb3 Rh8
33. Rdc1 Re8 34. Qxe6 fxe6 35. b5 axb5 36. Ba5 hxg3 37. hxg3 e5 38. axb5 Nxb5
39. d5 {[%cal Rd5c6]} e4 40. dxc6 bxc6 41. Rxc6 Re5 42. Bb4 {With the idea Bf1.
} Rc7 43. Ra6 {next Bf1 is good for White.} Re8 44. Bf1 Nc3 {[%cal Rc3b1]} 45.
Rb3 {aiming for Bd6.} Rec8 {The position is equal.} 46. Ba5 Rc6 47. Ra7+ Kh6 $1
48. Kg2 Nd5 49. Ba6 Rh8 50. Bb7 Rh7 51. Bxc6 Rxa7 52. Ra3 Bc3 53. Bxd5 {
Not much happened in this game.  Weighted Error Value: White=0.07/Black=0.07}
1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.21"]
[Round "5.3"]
[White "Anton Guijarro, David"]
[Black "Tari, Aryan"]
[Result "1/2-1/2"]
[ECO "C67"]
[WhiteElo "2679"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,119,27,0,27,22,25,25,18,24,35,27,28,6,12,8,33,8,3,18,52,47,47,49,38,
34,33,33,64,72,71,71,71,75,68,70,55,84,91,85,127,130,140,121,142,143,143,149,
147,143,124,125,177,132,179,177,211,211,252,242,233,173,170,0,47,47,48,48,48,
49,49,49,51,45,45,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-29977,-29978,-29978,-29978,
-29974,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. O-O Nxe4 5.
d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. h3 {is the new trend.} Be7 {
C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} (9... Ke8 {feels hotter.} 10. Rd1
Be7 11. Nc3 Be6 12. b3 Rd8) 10. Nc3 Nh4 {Black wants to play ...Nxf3+.} 11.
Nxh4 Bxh4 {White has an edge.} 12. Be3 h5 13. Rad1+ Ke8 $1 {[#]} 14. Ne4 $5
$146 {[%mdl 8] New and interesting.} (14. Ne2 {looks sharper.} b6 15. c4 Bb7
16. c5 Be7 17. f4) ({Predecessor:} 14. Ne2 Bf5 15. Nd4 Bh7 16. f4 Rd8 17. f5
Rd5 18. Bf4 Be7 19. g4 Bc5 20. c3 {1/2-1/2 (33) Karjakin,S (2752)-Ding,L (2791)
chess24.com INT 2020}) 14... Bf5 15. Ng5 Rf8 16. Rd4 (16. Nf3 {with more
complications.} Be7 17. Nd4 Bh7 18. f4 Rd8 19. f5) 16... Bxg5 17. Bxg5 f6 18.
exf6 gxf6 19. Bh4 $36 {[%mdl 2048] White has the initiative.} Kf7 20. Rf4 Kg6
21. Re1 Bxc2 22. Re6 Bf5 23. Re3 {[%cal Re3g3]} Bb1 24. Rg3+ Kh7 25. Bxf6 {
And now Rg7+ would win.} Rf7 26. Rg5 Kh6 {[#] aiming for ...Rxf6!} 27. Be5 Raf8
(27... Bxa2 28. Rxf7) 28. Rxf7 Rxf7 $16 {[%mdl 4096] Endgame KRB-KRB} 29. f4 h4
30. Rg4 $1 Kh5 31. Bg7 $1 {[%csl Gf4][%cal Rg4g5]} Rf5 32. Bc3 $1 Bxa2 33. Be1
a5 (33... Rf7 $16 {keeps fighting.}) 34. Rxh4+ $18 Kg6 35. Bc3 a4 36. Be5 $1 b5
37. Rh8 (37. Bxc7 Rd5 $14) 37... b4 38. Rb8 ({Less strong is} 38. Bxc7 Rc5 $14)
38... c5 39. Rb5 $2 ({Don't do} 39. Bxc7 $6 Rd5 $14) (39. Kf2 $1 $18) 39... b3
(39... Rxe5 $5 40. fxe5 b3 $11) 40. Rxc5 {Threatens to win with Rc6+.} Rxe5 41.
Rxe5 $14 {KR-KB} a3 $1 {[%cal Ra3b2]} 42. bxa3 b2 43. Rb5 b1=Q+ 44. Rxb1 Bxb1 {
KB-KP} 45. Kf2 {Black should prevent a4.} (45. a4 {seems wilder.} c5 46. Kf2
Be4 47. g4 Bc6 48. a5) 45... Bc2 46. g4 c5 47. Ke3 Kf6 48. Kd2 Ba4 49. h4 {
h5 is the strong threat.} Bd7 50. f5 Ba4 51. Ke3 c4 52. Kf4 $2 {[%mdl 8192]} (
52. Kd2 $11) 52... c3 53. g5+ Kf7 54. Ke3 {[#]} c2 $2 (54... Bb5 $1 {mates} 55.
a4 Bf1 56. a5 Bc4 57. h5 Kg7 58. f6+ Kf7 59. h6 Kg6 60. f7 Kxf7 61. Kd4 {[#]}
c2 $1 62. Kxc4 c1=Q+ {[%mdl 64] Double Attack} 63. Kb4 Qc6 64. Ka3 Qb5 65. a6
Qxa6+ 66. Kb4 Kg6 67. Kc3 Kxg5 68. h7 Qh6 69. Kc4 Qxh7 70. Kd5 Qd3+ 71. Kc5 Kf5
72. Kc6 Ke5 73. Kc5 Qc3+ 74. Kb6 Kd6 75. Kb5 Qb3+ 76. Ka5 Kc7 77. Ka6 Qb6#) 55.
Kd2 $11 {The position is equal.} Kg7 56. h5 Bb3 57. Kc1 Ba4 58. Kb2 Bb3 59. Kc1
Ba4 60. Kb2 {Never resign too early!  Weighted Error Value: White=0.16/Black=0.
18} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.21"]
[Round "5.4"]
[White "Giri, Anish"]
[Black "Harikrishna, Pentala"]
[Result "1/2-1/2"]
[ECO "D20"]
[WhiteElo "2764"]
[BlackElo "2732"]
[Annotator "TA"]
[PlyCount "51"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,51,31,21,30,5,33,25,44,39,43,29,18,0,0,0,5,0,0,-17,0,9,40,24,15,0,10,
10,74,42,105,104,96,101,86,88,96,102,113,121,117,8,2,0]} 1. d4 d5 2. c4 dxc4 3.
e4 e5 4. Nf3 exd4 5. Bxc4 Nc6 6. O-O Be6 {D20: Queen's Gambit Accepted: 3 e3
and 3 e4.} 7. Nbd2 {7.Bxe6 is becoming the main line.} Bd6 8. Qb3 Qd7 {White
has an edge.} 9. Qxb7 Rb8 10. Qa6 Nge7 11. a3 O-O 12. b4 {[#]} Bg4 $146 ({
Predecessor:} 12... Ng6 13. Bb2 Bh3 14. Rfc1 Bxg2 15. Kxg2 Nce5 16. Nxe5 Bxe5
17. Kf1 Rb6 18. Qxa7 {0-1 (78) Neelash,S (2334)-Donoso Diaz,S (2203) New Delhi
2019}) 13. Bb2 Bf4 (13... Rb6 $5 14. Qa4 $8 Bf4 $11) 14. Rfe1 Qd6 15. g3 Bh6 (
15... Rb6 $5 16. Qa4 $8 Bh6 $14) 16. e5 Qd7 17. Bf1 Ng6 18. Bg2 Rb6 {[#]} (
18... d3 $11 {remains equal.}) 19. Qf1 $1 $16 a5 (19... Rd8 $14) 20. b5 Bxd2
21. Nxd2 Ncxe5 22. a4 Bf5 {[#]} 23. Ne4 $1 {[%mdl 1024] White has strong
compensation.} d3 24. Rad1 Rd8 25. Bc3 (25. Re3 $16) 25... Nc4 $11 26. Nd2 {
Weighted Error Value: White=0.13/Black=0.13} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.21"]
[Round "5.5"]
[White "Caruana, Fabiano"]
[Black "Esipenko, Andrey"]
[Result "1/2-1/2"]
[ECO "A29"]
[WhiteElo "2823"]
[BlackElo "2677"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,79,0,0,8,0,0,-8,-17,-14,-5,0,0,0,3,0,0,17,12,9,9,9,17,32,26,25,19,12,
27,9,15,22,11,12,14,9,10,12,23,26,-17,-4,-19,-17,-16,-12,-21,-28,-12,-12,-26,
-26,-40,-12,-11,-9,-18,-28,-28,-9,-28,-28,-28,-28,-28,-28,-28,7,7,1,1]} 1. c4
Nf6 2. Nc3 e5 3. Nf3 Nc6 4. g3 Bb4 5. Nd5 e4 6. Nh4 d6 7. Bg2 {A29: English
Opening: Four Knights Variation with 4 g3.} O-O {And now ...g5 would win.} 8.
O-O g5 9. d4 $1 h6 ({Wrong is} 9... gxh4 $2 10. Bg5 $18) 10. Ne3 {Strongly
threatening Nhf5.} gxh4 11. a3 Ba5 {[#] Hoping for ...h3.} 12. b4 Bb6 13. c5 {
[#]} h3 $146 ({Predecessor:} 13... d5 14. gxh4 Kh8 15. Kh1 Rg8 16. f3 exf3 17.
Rxf3 Be6 18. Qf1 Nh5 19. Qf2 Ne7 {1/2-1/2 (28) Sikorsky,H (2529)-Helbich,J 
(2521) ICCF email 2018}) 14. Bh1 dxc5 15. dxc5 Qxd1 16. Rxd1 Bxc5 $1 17. bxc5
Re8 18. Bb2 Ne5 $1 19. Rd4 Neg4 20. Rf1 a5 21. a4 Ra6 22. Nxg4 Bxg4 23. f3 Be6
24. fxe4 Nd7 25. Ba3 (25. e5 $5 {[%cal Rh1b7]} Nxc5 26. Rh4 $11) 25... Ne5 26.
Rb1 (26. Bb2 {keeps more tension.} Rc6 27. Rc1 Kg7 28. Bf3 Kg6 29. Kf2) 26...
b6 27. cxb6 Rxb6 28. Rxb6 cxb6 29. Bd6 Bb3 30. Bc7 Re6 31. Bf3 Nxf3+ (31... f6
{looks sharper.} 32. Kf2 Rc6 33. Bb8 Kf7 34. Ba7 Be6) 32. exf3 $15 {[%mdl 4096]
Endgame KRB-KRB} Rc6 33. Bf4 h5 34. Kf2 Rc2+ 35. Rd2 Bxa4 36. Rxc2 Bxc2 37. Bc7
a4 38. Bxb6 Bd1 39. Bc5 Kg7 40. Ke3 {An uneventful encounter.  Weighted Error
Value: White=0.03/Black=0.03} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.21"]
[Round "5.6"]
[White "Grandelius, Nils"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1-0"]
[ECO "B97"]
[WhiteElo "2663"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,69,0,0,27,24,24,27,24,30,34,31,22,0,0,0,0,0,0,0,5,4,131,131,131,135,
136,133,131,121,117,97,106,77,131,124,118,129,184,184,162,157,209,194,530,507,
627,612,1362,1362,1120,1155,1079,978]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4
Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Rb1 Qa3 10. f5 Be7 {B97:
Sicilian Najdorf: Poisoned Pawn.} 11. fxe6 Bxe6 12. Nxe6 fxe6 {White has an
edge.} 13. Bc4 $1 {[%cal Rc4e6]} Nbd7 {...Nc5 is the strong threat.} 14. Bxe6 (
{Don't play} 14. Rxb7 Nc5 $17) 14... Nc5 15. Bb3 Rc8 16. O-O {Threatens to win
with Bxf6.} Nxb3 17. Rxb3 {[%mdl 64] Double Attack} Qc5+ 18. Be3 Qc4 19. Rf4 {
[#] Hoping for e5!} Qe6 $146 (19... Nh5 $1 $11 {keeps the balance.} 20. Rf5 Nf6
) ({Predecessor:} 19... Nh5 20. Rf1 Rf8 21. Re1 b5 22. Nd5 Qxc2 23. Qd4 Nf6 {
1/2-1/2 (48) Rothman,I (2158)-Pessoa,F (2525) ICCF email 2010}) 20. Rxb7 $16
O-O 21. h3 $36 {[%mdl 2048] Keeping Black busy.} Rb8 22. Ra7 Ra8 23. Rxa8 Rxa8
24. Nd5 Rb8 25. c4 Bd8 (25... Nxd5 $142 26. exd5 (26. cxd5 Qe5 $14) (26. Qxd5
Qxd5 27. exd5 Rb1+ 28. Rf1 Rb4 $14) 26... Rb1+ 27. Kh2 Qe5) 26. Qf2 Nd7 27. Bd4
Bg5 {[#]} (27... h6 $16) 28. Rf5 $1 $18 {[%cal Rf5g5]} Bh6 29. Kh2 Rc8 (29...
Rf8 $16) 30. Qg3 g6 $2 {[#]} (30... Re8 {is more resistant.} 31. Bc3 Rf8 32.
Rxf8+ Kxf8) 31. Qh4 $1 {[%cal Rh4h6][%mdl 512] White is clearly winning.} Bf8 {
[#]} (31... Bg7 32. Qe7) 32. Rf6 {[%mdl 512]} Qe8 {[#]} (32... Nxf6 33. Nxf6+)
33. Rxf8+ $1 {[%mdl 576] Remove Defender} Qxf8 34. Ne7+ {[%mdl 64] Double
Attack} Kf7 35. Nxc8 {Weighted Error Value: White=0.03/Black=0.41} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.21"]
[Round "5.7"]
[White "Wojtaszek, Radoslaw"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "D41"]
[WhiteElo "2705"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "53"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 25,53,18,37,10,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0]} 1.
d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8.
cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 Nc6 12. O-O b6 13. Rad1 Bb7 14. Qf4
{D41: Queen's Gambit Declined: Semi-Tarrasch with 5 cxd5.} Qf6 {[#] The
position is equal.} 15. Qg4 $146 ({Predecessor:} 15. Qe3 Rac8 16. d5 Ne5 17.
Nxe5 Qxe5 18. f4 Qc7 19. Bb3 exd5 20. exd5 Rfe8 21. d6 Rxe3 22. dxc7 {1-0 (54)
Santiago,Y (2460)-Rodriguez,J (2395) Villa Martelli 2018}) 15... Rfd8 {[%cal
Rc6d4]} 16. d5 exd5 17. Bxd5 Ne5 18. Nxe5 Bxd5 19. Rxd5 Rxd5 20. exd5 Qxe5 $11
{[%mdl 4096] Endgame KQR-KQR} 21. Qd7 Qe8 22. Qc7 Qb8 23. Qe7 Qf8 24. Qb7 Qc8
25. Qe7 Qf8 26. Qb7 Qc8 27. Qe7 $1 {Not much happened in this game.  Weighted
Error Value: White=0.04/Black=0.01} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.22"]
[Round "6.1"]
[White "Duda, Jan-Krzysztof"]
[Black "Carlsen, Magnus"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2743"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,100,16,11,11,8,12,16,17,10,16,10,9,0,0,-14,0,-10,-6,0,-5,-25,-9,-11,
-6,-63,-57,-29,-40,-61,-29,-50,-30,-29,-17,-13,0,0,0,0,0,0,0,0,0,0,0,-12,-12,
-7,-2,-16,-8,-14,-6,-37,-28,-22,-12,-37,-33,-87,-85,-119,-58,-45,-47,-28,-31,
-28,-10,-12,0,-22,-22,-22,-22,-32,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e5 2.
Nf3 Nc6 3. Bc4 Nf6 4. d3 Bc5 5. O-O d6 6. c3 a5 {C54: Giuoco Piano: 4 c3 Nf6,
main lines with 5 d4 and 5 d3.} 7. Re1 O-O 8. Nbd2 Ba7 9. Nf1 Be6 10. Bb5 Ne7
11. Ng3 Ng6 12. h3 c6 13. Ba4 d5 14. exd5 Nxd5 {[#]} 15. d4 $146 ({Predecessor:
} 15. Bc2 Qc7 16. d4 exd4 17. Nxd4 Rae8 18. Bg5 Ndf4 19. Qd2 Bd5 20. Rxe8 Rxe8
21. Re1 {0-1 (98) Alekseenko,K (2698)-Giri,A (2763) Ekaterinburg 2020}) 15...
exd4 16. Nxd4 Qc7 17. Qf3 (17. Bc2 $11) 17... Bxd4 18. cxd4 Qb6 19. Rd1 Rad8
20. Bb3 Nc7 21. Nf5 Bxb3 22. axb3 Qb5 23. h4 h5 24. Bd2 (24. Qxh5 Rd5 $17)
24... b6 25. Bg5 $1 {[%cal Rg5d8]} (25. Qxh5 Rd5 $17) 25... f6 26. Bh6 Rf7 $1 (
{Avoid the trap} 26... gxh6 $2 27. Qxh5 Qxf5 28. Qxf5 $18) 27. Qxh5 Ne7 28.
Nxe7+ Rxe7 29. Qxb5 cxb5 30. Bd2 Re4 {[%mdl 64] [#] Double Attack} 31. d5 Nxd5
32. Be3 {next Bxb6! is good for White.} Rd7 ({Much weaker is} 32... Rxh4 $6 {
[#]} 33. Bxb6 $1 {[%mdl 512]} Rb8 34. Bxa5 $16 (34. Rxd5 Rxb6 35. Rxa5 Rb4 $14)
) 33. g3 Ree7 34. Bd4 Re6 35. Rac1 (35. Rd2 $15) 35... Red6 $17 36. Re1 Nb4 (
36... Kf7 $17 {Strongly threatening ...Nb4.} 37. Rb1 Nb4) 37. Rc8+ Kf7 38. Be3
Nd5 39. Rb8 b4 40. Kf1 Kg6 41. g4 (41. Bd4 {looks sharper.} Kf5 42. f3 Ne7 43.
Bxb6 Rd3 44. Kg2) 41... Nxe3+ 42. Rxe3 $11 {[%mdl 4096] Endgame KRR-KRR} Rd4
43. g5 f5 44. Rh8 $1 {The position is equal.} Re4 {White must now prevent ...
Rxe3.} 45. Ke2 Rxe3+ 46. Kxe3 {With the idea f4.} Re7+ 47. Kd3 {aiming for f4.}
Rd7+ 48. Ke3 {White wants to play f4.} Re7+ 49. Kd3 {And now f4 would win.}
Rd7+ 50. Ke3 {Threatening f4.} Re7+ {Weighted Error Value: White=0.08/Black=0.
05} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.22"]
[Round "6.2"]
[White "Vachier-Lagrave, Maxime"]
[Black "Tari, Aryan"]
[Result "1/2-1/2"]
[ECO "D78"]
[WhiteElo "2784"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,52,0,26,0,0,0,0,2,18,-1,0,-17,-26,-27,-20,-14,-18,-12,-12,-15,-14,
-19,-13,-37,-36,-22,-19,-54,-10,-16,-3,-3,-10,-22,-16,-24,-6,-25,-27,-61,-55]} 
1. Nf3 d5 2. g3 g6 3. Bg2 Bg7 4. d4 Nf6 5. O-O O-O 6. c4 c6 {The main line 6...
c6 scores better than 6...dxc4.} 7. Qb3 a5 {[%cal Ba7a5,Ba5a4][%mdl 32]} 8. Bf4
{D78: Fianchetto Grünfeld: 6 0-0 c6.} a4 9. Qb4 dxc4 10. Qxc4 {The position is
equal.} Qa5 {[#]} 11. Na3 $146 ({Predecessor:} 11. h3 Be6 12. Qc1 Rd8 13. Na3
Na6 14. Be5 Nb4 15. Nc4 Qb5 16. b3 axb3 17. axb3 Rxa1 18. Qxa1 Bxc4 19. bxc4
Qxc4 {1-0 (61) Dreev,A (2670)-Corrales Jimenez,F (2559) chess.com INT 2019})
11... Be6 12. Qc1 Bd5 13. Re1 Nbd7 14. Nc4 Qa7 15. Nce5 Nxe5 16. Bxe5 Qb6 17.
h4 Rfd8 18. Bf1 Ne4 {White must now prevent ...Bxe5.} 19. Bxg7 Kxg7 20. Rd1 c5
(20... Ra5 {keeps more tension.} 21. Qf4 f6 22. Qe3 Qxb2 23. Ne1 Re8) 21. dxc5
Qxc5 22. Qxc5 Nxc5 23. Nd4 Rac8 24. Nc2 e5 25. Nb4 Be6 26. e3 Bg4 {Weighted
Error Value: White=0.10/Black=0.07} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.22"]
[Round "6.3"]
[White "Van Foreest, Jorden"]
[Black "Anton Guijarro, David"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2671"]
[BlackElo "2679"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,73,12,6,15,44,14,24,6,14,13,18,0,0,0,14,0,0,8,4,-22,-6,0,35,7,43,27,
61,35,67,52,55,63,50,52,81,78,117,93,132,132,117,131,118,147,141,146,117,149,
140,129,170,170,163,106,106,99,95,81,2368,2014]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6
4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. c3 O-O 9. h3 {C84: Closed Ruy
Lopez: Unusual White 6th moves.} h6 10. a4 $5 {[%mdl 4] White wants to play
axb5. An interesting side line.} Bd7 11. Bc2 {White has an edge.} b4 12. Nbd2
Re8 {[#]} 13. a5 $146 ({Predecessor:} 13. Nc4 Be6 14. Re1 bxc3 15. bxc3 Bxc4
16. dxc4 Na5 17. Nh4 Rb8 18. Nf5 Bf8 19. Rb1 Rxb1 20. Bxb1 {1/2-1/2 (51)
Sukhanitskij,S (2059)-Parente,A (1588) LSS email 2014}) 13... Bf8 14. Re1 Rb8
15. d4 bxc3 16. bxc3 exd4 17. cxd4 Nb4 18. Bb1 g6 19. Ra3 Bg7 20. Nf1 Rb5 21.
Ng3 Nh5 22. Nxh5 Rxh5 23. d5 c5 24. Bf4 Bb2 25. Rae3 Qf6 26. Bg3 c4 27. Qe2 Bb5
28. e5 Bxe5 29. Nxe5 dxe5 30. Bxe5 Rexe5 31. Rxe5 c3 32. Qe3 c2 {White must
now prevent ...Rxe5.} 33. Rxh5 gxh5 {[#]} 34. Bxc2 {[%mdl 512]} Nxc2 $16 35.
Qe5 Kg7 36. Re4 {[%mdl 1024] Hoping for d6. White has strong compensation.} Bd3
$2 {[%mdl 8192]} (36... Qxe5 $16 37. Rxe5 Nd4) 37. Qg3+ {[%mdl 64] Double
Attack.  Weighted Error Value: White=0.10/Black=0.15} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.22"]
[Round "6.4"]
[White "Grandelius, Nils"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "B30"]
[WhiteElo "2663"]
[BlackElo "2823"]
[Annotator "TA"]
[PlyCount "124"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,124,40,54,47,36,41,31,0,20,1,10,0,15,10,0,0,0,0,0,-7,-8,-21,0,0,-6,-8,
0,-14,-8,-7,0,-12,-12,-12,-12,-12,-12,-12,-5,-15,-9,-19,-7,-12,-8,-21,-5,-27,
-20,-25,-13,-37,-37,-37,-37,-37,-37,-37,-37,-37,-22,-37,-37,-37,-37,-37,-15,
-37,-37,-37,-37,-37,-37,-37,-33,-33,-33,-33,-23,-34,-27,-35,-33,-33,-33,-40,
-39,-40,-40,-45,-40,-41,-38,-40,-35,-58,-58,-58,-58,-58,-21,-58,-58,-58,-58,
-58,-58,-66,-58,-65,-65,-65,-58,-58,-16,-16,-16]} 1. e4 c5 2. Nf3 Nc6 3. Bb5 e5
4. O-O Bd6 5. c3 a6 6. Ba4 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.}
b5 7. Bc2 Nge7 8. d4 {White is slightly better.} cxd4 9. cxd4 exd4 {[#]} 10.
Nbd2 $146 ({Predecessor:} 10. Nxd4 Nxd4 11. Qxd4 Qc7 12. Qd3 Bxh2+ 13. Kh1 Bf4
14. Nc3 Bxc1 15. Raxc1 Qe5 16. f4 {1-0 (29) Jones,G (2702)-Vidit,S (2707)
Hengshui 2019}) 10... Bb7 11. Nb3 Qc7 12. h3 Rc8 13. Nbxd4 Nxd4 14. Qxd4 O-O
15. Bb3 Nc6 16. Qd1 Ne5 17. Nxe5 Bxe5 18. Re1 Rfe8 19. f4 Bxf4 20. Bxf7+ Kxf7
21. Bxf4 Qb6+ ({Much worse is} 21... Qxf4 $6 22. Rf1 $16) 22. Kh2 Qe6 23. e5
Kg8 {And now ...Qf5 would win.} 24. Bg3 Rc4 25. Rf1 a5 26. Rf2 a4 27. a3 Rec8
28. Qd6 h5 29. Raf1 h4 {[#] Strongly threatening ...Qxd6.} (29... Qxd6 {
with more complications.} 30. exd6 Re4 31. Rd2 Rc5 32. Rf4 Rxf4 33. Bxf4 Bc6)
30. Qxe6+ (30. Bf4 {seems wilder.} Qxd6 31. exd6 b4 32. axb4 Rxb4 33. Be5)
30... dxe6 31. Bf4 b4 32. axb4 Rxb4 33. Bg5 Bd5 34. Be7 Rbc4 (34... Re4 {
is interesting.} 35. Rf8+ Rxf8 36. Rxf8+ Kh7 37. Rf2 Kh6) 35. Rf8+ Rxf8 36.
Rxf8+ $15 {[%mdl 4096] Endgame KRB-KRB} Kh7 {[#] aiming for ...Rc2.} 37. Rf2
Kg6 38. Bd8 Re4 39. Bc7 Kh5 40. Bd6 g5 41. Bc7 g4 42. hxg4+ Kxg4 43. Bd6 Bb3
44. Kg1 Bc4 45. Kh1 h3 46. Kh2 hxg2 47. Kxg2 Bd5 48. Kf1 Re3 49. Kg1 Re1+ 50.
Rf1 Re2 {( -> ...Rg2+)} 51. Rf2 {[%cal Rf2e2]} Re3 52. Rf1 Rg3+ 53. Kf2 Rb3 54.
Ra1 Bc6 (54... Rxb2+ {keeps more tension.} 55. Ke3 Bc6 56. Rc1 Rb3+ 57. Kd2 Rb6
) 55. Ke2 Rxb2+ 56. Ke3 Bb5 57. Kd4 Kf4 58. Ra3 Be8 59. Kc3 Rb1 60. Kd4 Bd7 61.
Rc3 Rb5 62. Rc7 Rd5+ {Weighted Error Value: White=0.05/Black=0.05} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.22"]
[Round "6.5"]
[White "Harikrishna, Pentala"]
[Black "Wojtaszek, Radoslaw"]
[Result "1/2-1/2"]
[ECO "D38"]
[WhiteElo "2732"]
[BlackElo "2705"]
[Annotator "TA"]
[PlyCount "85"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,85,16,25,18,20,29,8,12,9,25,13,27,19,27,0,5,9,16,8,25,0,9,0,11,2,24,
11,19,23,30,0,0,0,35,27,35,27,31,24,22,25,33,25,38,38,43,27,43,43,43,43,43,43,
43,43,43,43,43,43,43,43,43,0,1,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3.
Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 O-O {D38: Queen's Gambit
Declined: Ragozin Defence (4 Nf3 Bb4).} 8. e3 Bf5 9. Be2 $1 {[%mdl 4] is
currently scoring better than 9.Qb3.} Nbd7 10. Qb3 Qe7 11. O-O c6 12. a3 Bxc3
13. Bxf6 Nxf6 14. bxc3 b5 15. a4 a6 {[#]} 16. Qa3 $146 ({Predecessor:} 16. Ne5
Qc7 17. Ra3 c5 18. axb5 c4 19. Qa2 a5 20. Ra1 Ne4 21. Bf3 Rab8 22. Bxe4 Bxe4
23. Rxa5 {1-0 (40) Grischuk,A (2777)-Aronian,L (2781) Lichess.org INT 2020})
16... Qb7 17. Ra2 Rfc8 18. Ne5 Rab8 19. Rb2 Nd7 (19... Qc7 {feels hotter.} 20.
Ra1 Ne4 21. Bd3 Rb6 22. f3 Nd6) 20. Nxd7 Qxd7 21. h3 Qd8 22. Ra1 Qf8 23. Qxf8+
Kxf8 24. axb5 axb5 25. Ra7 Ra8 26. Rba2 Rxa7 27. Rxa7 $11 {[%mdl 4096] Endgame
KRB-KRB} Rb8 28. g4 Be6 29. Bd3 b4 30. cxb4 Rxb4 31. Rc7 Rb6 32. Bf5 Bxf5 33.
gxf5 $14 {KR-KR} Rb1+ 34. Kg2 Rc1 35. Kg3 h5 36. Kf4 f6 37. f3 Rc4 {The
position is equal.} 38. h4 (38. Rd7 {looks sharper.} Ra4 39. Rd6 Rc4 40. Rd8+
Kf7 41. Rc8) 38... Rc3 39. e4 dxe4 40. fxe4 Rd3 41. Rc8+ Kf7 42. Rc7+ Kf8 43.
Rc8+ {Weighted Error Value: White=0.06/Black=0.05} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.22"]
[Round "6.6"]
[White "Esipenko, Andrey"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "D45"]
[WhiteElo "2677"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 23,84,0,0,0,12,16,19,16,16,9,14,0,12,6,10,8,4,16,34,29,30,0,10,0,6,0,0,
0,0,0,0,0,0,0,0,6,6,6,9,0,1,0,6,0,0,0,0,0,0,0,0,0,4,4,6,0,0,0,0,0,0,0,0]} 1. d4
d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Qc2 Bd6 7. b3 O-O 8. Be2 b6 9.
O-O Bb7 10. Bb2 Qe7 11. Rad1 Rad8 12. Rfe1 Rfe8 13. Bf1 {D45: Semi-Slav: 5 e3.}
c5 14. cxd5 exd5 15. g3 Rc8 16. Bh3 c4 {[#]} 17. bxc4 $146 ({Predecessor:} 17.
Nd2 cxb3 18. Qxb3 a6 19. a4 h5 20. Nf3 a5 21. Rc1 Bb4 22. Red1 Ng4 23. Rf1 {
1/2-1/2 (54) Piccardo,V (2511)-Persson,C (2578) ICCF email 2010}) 17... Rxc4
18. Nd2 Rc7 19. Qb3 a6 $1 20. a4 h5 21. Rc1 h4 22. Ncb1 Rec8 {The position is
equal.} 23. Rxc7 Rxc7 24. Rc1 Rxc1+ 25. Bxc1 hxg3 26. hxg3 Bb4 27. Nc3 Qd6 28.
Ndb1 Nf8 (28... a5 {with more complications.} 29. Ba3 Nb8 30. Bb2 Qc6 31. Nd2
Ba6) 29. Ba3 Bxa3 30. Qxa3 Qc7 31. Nd2 N8h7 32. Bg2 Ng5 33. Nf3 Nge4 34. Nxe4
Nxe4 35. Ne5 Bc8 36. Qb2 Be6 37. Kh2 a5 38. Bxe4 dxe4 39. Qb5 Kf8 40. Nc6 Bd7
41. d5 f5 42. Kg2 Bxc6 {Weighted Error Value: White=0.02/Black=0.02} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.22"]
[Round "6.7"]
[White "Donchenko, Alexander"]
[Black "Firouzja, Alireza"]
[Result "0-1"]
[ECO "D31"]
[WhiteElo "2668"]
[BlackElo "2749"]
[Annotator "TA"]
[PlyCount "86"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 28,86,7,10,31,12,33,20,38,0,0,-16,-27,-24,-6,-6,0,-47,-35,-65,-23,-23,
-25,-18,40,54,95,-116,0,0,75,-85,-70,-118,-123,-103,-116,-107,-7,-440,-416,
-409,-400,-29984,-29985,-29985,-29986,-29986,-29987,-29987,-29988,-29988,
-29989,-29989,-29990,-29990,-29991,-29991,-29992,-29992,-29993]} 1. d4 d5 2. c4
e6 3. Nc3 Bb4 4. Nf3 dxc4 5. e3 b5 6. a4 c6 7. Bd2 a5 8. axb5 Bxc3 9. Bxc3 cxb5
10. b3 Bb7 11. bxc4 b4 12. Bb2 Nf6 13. Bd3 O-O $1 {[%mdl 4] is now more
promising than 13...Nbd7.} 14. O-O Nbd7 15. Nd2 e5 {D31: Queen's Gambit
Declined: Semi-Slav without ...Nf6 (+ Marshall Gambit and Noteboom) and
Exchange Variation lines without ...Nf6.} 16. Bc2 Qc7 17. h3 Rfe8 {The
position is equal.} 18. Bb3 {[#]} h6 $146 ({Predecessor:} 18... Ne4 19. Nxe4
Bxe4 20. Re1 Ra6 21. f3 Bf5 22. c5 Rg6 23. Kh1 Rh6 24. Bc4 Bxh3 25. gxh3 exd4 {
1/2-1/2 (35) Rudolf,M (2129)-Ress,J (2179) LSS email 2013}) 19. Nf3 Ra6 20.
Nxe5 Nxe5 21. dxe5 Nd7 22. f4 Nc5 {[%mdl 1024] And now ...Rg6 would win. Black
has compensation.} 23. Bc2 a4 {White should prevent ...Rd8.} (23... Rd8 $5 {
[%cal Rd8d1]} 24. Qg4 b3 $11) 24. f5 $1 b3 25. Bb1 Raa8 ({Black should try} 
25... a3 $11 26. Rxa3 Rxa3 27. Bxa3 Qxe5) 26. e6 $1 $14 {Qg4! is the strong
threat.} Qg3 {[%csl Gb7][%cal Rg3g2][%mdl 64] Double Attack} (26... fxe6 $2 27.
f6 $18) 27. Rf2 (27. Qe2 $16 {stays on course. Strongly threatening Bd4.} f6
28. Rf4) 27... f6 $40 {[%mdl 128] Black mounts an attack.} ({Wrong is} 27...
Qxe3 $2 28. exf7+ Kxf7 29. Qh5+ Ke7 30. f6+ gxf6 31. Bg6 $18) (27... fxe6 $17
28. f6 gxf6) 28. Bd4 Ne4 {[#]} (28... Rec8 $11 {remains equal.}) 29. Bxe4 $2 (
29. Rf3 $1 $16 {[%cal Rf3g3]} Qb8 30. Rf4) 29... Bxe4 $17 30. Ra3 Rec8 31. c5
Kh7 32. Qd2 b2 (32... Rd8 $17) 33. Qxb2 $4 {[%mdl 8192] This costs White the
game.} (33. Bxb2 $11 Rxc5 34. Qb4 Rxf5 35. Qxe4 Qxf2+ {[%mdl 64] Double Attack}
36. Kh2) 33... Rab8 34. Qa2 {With the idea Rf1.} Rb1+ 35. Rf1 (35. Qxb1 $19
Bxb1 36. Rxa4) 35... Rcb8 {Black mates.} 36. Qf2 Rxf1+ 37. Kxf1 {[#]} Rb1+ $1
38. Ke2 Qb8 39. Qf4 Qb5+ 40. Kd2 Qb4+ {[%mdl 64] Double Attack} 41. Bc3 Qxa3
42. Qxe4 Qc1+ 43. Kd3 Qf1+ {Weighted Error Value: White=0.58/Black=0.22} 0-1

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.23"]
[Round "7.1"]
[White "Carlsen, Magnus"]
[Black "Harikrishna, Pentala"]
[Result "1/2-1/2"]
[ECO "B46"]
[WhiteElo "2862"]
[BlackElo "2732"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,60,13,0,0,0,35,37,36,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 Qc7
6. f4 a6 7. Nxc6 bxc6 8. Bd3 d5 9. O-O Nf6 10. Qe2 Be7 {B46: Sicilian:
Taimanov: 5 Nc3 a6.} 11. Bd2 c5 {[#] ...c4 is the strong threat.} 12. b3 {
[%cal Bb2b3,Bb3c4][%mdl 32]} Bb7 {White is slightly better.} 13. Rae1 c4 {
The position is equal.} 14. bxc4 {aiming for exd5.} dxe4 15. Nxe4 Nxe4 16. Bxe4
Bxe4 17. Qxe4 Rc8 18. f5 Qxc4 {[%mdl 64] [#] Double Attack} 19. fxe6 f6 20. Qb7
{[#]} Qc6 $146 ({Predecessor:} 20... Rc7 21. Qb8+ Rc8 22. Qg3 g6 23. Bh6 Qd4+
24. Kh1 Bd6 25. Qh3 Rc3 26. Be3 Qe5 27. Qh4 Rxe3 28. Rxe3 Qxe3 29. Qa4+ Kf8 30.
Qd7 Be7 31. Rxf6+ {1-0 (31) Maltsevskaya,A (2273)-Zhemchuzhina,E (1909) Moscow
2017}) 21. Rb1 {Black must now prevent Qxc6+.} Bc5+ 22. Kh1 {Intending Qf7+
and mate.} Qxb7 23. Rxb7 O-O 24. Re1 Rfe8 25. g3 $36 {[%mdl 2048] White is
pushing.} Rc6 26. e7 Kf7 27. c4 Bd6 28. Bb4 Bxb4 29. Rxb4 Rxe7 30. Rxe7+ Kxe7 {
Weighted Error Value: White=0.03/Black=0.01} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.23"]
[Round "7.2"]
[White "Anton Guijarro, David"]
[Black "Donchenko, Alexander"]
[Result "1/2-1/2"]
[ECO "B70"]
[WhiteElo "2679"]
[BlackElo "2668"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,69,22,18,24,12,26,32,32,39,41,35,37,25,50,37,47,27,32,47,72,72,85,75,
104,117,120,41,41,41,37,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,-14,0,0]} 1. e4
c5 2. Nc3 d6 3. Nge2 Nf6 4. g3 Nc6 5. Bg2 g6 6. d4 cxd4 7. Nxd4 Nxd4 8. Qxd4
Bg7 9. O-O O-O 10. a4 Be6 {With the idea ...Nd5. B70: Sicilian Dragon: 6 g3
and 6 Be2 (without a later Be3).} 11. Qd1 Rc8 12. Nd5 Qd7 {White is slightly
better.} 13. Re1 Rfe8 14. c3 Bh3 {[#]} 15. Bf3 $146 ({Predecessor:} 15. Bh1 Nh5
16. a5 e6 17. Ne3 Nf6 18. Qa4 Rc7 19. Qxd7 Nxd7 20. Rd1 Nc5 21. Ra3 {1/2-1/2 
(67) Fakhiridou,E (2196)-Akshayraj,K (2454) Kavala 2012}) 15... Nxd5 16. exd5
a6 17. a5 h5 18. Be3 Bf6 19. Ra4 Kg7 20. Rb4 Rh8 21. Qd2 Bg4 22. Bxg4 (22. Be4
$16) 22... hxg4 $14 23. Qd1 Rh5 24. Bd4 (24. h3 {looks sharper.} Rxh3 25. Qxg4
Qxg4 26. Rxg4 Rch8 27. Kg2) 24... Rch8 {The position is equal.} 25. Bxf6+ exf6
26. Qxg4 Qxg4 27. Rxg4 Rxh2 $11 {[%mdl 4096] [#] Endgame Strongly threatening .
..Rh1+. KRR-KRR} 28. Re7 Rh1+ 29. Kg2 R8h2+ 30. Kf3 {aiming for Rd4.} Rf1 31.
Re2 Rd1 32. Rd4 Rxd4 33. cxd4 {Re7 is the strong threat.} Rh5 34. Ke4 Rh1 35.
Kd3 {Weighted Error Value: White=0.08/Black=0.06} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.23"]
[Round "7.3"]
[White "Tari, Aryan"]
[Black "Van Foreest, Jorden"]
[Result "0-1"]
[ECO "C64"]
[WhiteElo "2625"]
[BlackElo "2671"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,64,85,41,43,29,36,38,37,38,46,19,13,0,0,0,0,0,0,0,0,-26,-31,-27,-35,
-16,-44,-47,-39,-53,-8,-170,-172,-319,-309,-301,-313,-439,-435,-394,-454,-440,
-452,-441,-439,-557,-529,-534,-520,-518,-516,-493,-495,-1040,-1052,-5581,-4890]
} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Bc5 5. O-O Nge7 6. c3 Ba7 {6...Ng6 is
the modern continuation. C64: Ruy Lopez: Classical Defence (3...Bc5) except 4
0-0 Nf6.} 7. d4 Ng6 8. Bg5 f6 {White is slightly better.} 9. Be3 O-O 10. d5 {
[#]} Nce7 $146 ({Predecessor:} 10... Nb8 11. Bxa7 Rxa7 12. d6 b5 13. Bb3+ Kh8
14. c4 Bb7 15. Re1 c5 16. Nc3 b4 {1-0 (40) Paravyan,D (2629)-Krysa,L (2522)
Caleta 2020}) 11. Bxa7 Rxa7 {[%cal Ba8a7,Ba7b7,Bb7b6][%mdl 32]} 12. d6 cxd6 13.
Qxd6 b5 14. Bb3+ Kh8 15. a4 Rb7 16. axb5 Rb6 17. Qd1 axb5 18. Nbd2 Bb7 19. c4
f5 20. Bc2 {White does not recover from this.} (20. c5 $11 {and White is okay.}
Rbf6 21. Re1) 20... fxe4 $1 $19 21. Ng5 (21. Bxe4 {was worth a try.} Bxe4 22.
Nxe4 bxc4 {[%mdl 64] Discovered Attack} 23. Nc5) 21... Nf5 $1 {[%cal Be7f5,
Bf5d4,Bd4c2][%mdl 32]} 22. Ngxe4 Nf4 $1 {Strongly threatening ...Rg6!} 23. Nf3
(23. Kh1 $142) 23... bxc4 24. Nxe5 {[#]} Nd4 $1 {[%mdl 512]} 25. Re1 {Black is
clearly winning.} Nxc2 26. Qxc2 {Black must now prevent Ng5!} Re6 ({But not} 
26... Nxg2 $2 27. Ng5 $1 $18 {[%mdl 512]}) 27. Qc3 Qe7 28. Ra5 {and the idea
Ng5 leaves White hopeful.} d6 29. Ng5 {aiming for Ng6+!} Rxe5 ({Not} 29... Qxg5
$2 {[#]} 30. Nf7+ $1 Rxf7 31. Rxg5 $18) 30. Raxe5 dxe5 31. Rxe5 (31. Qxe5 $142
Qxe5 32. Rxe5) 31... Qf6 {Hoping for ...Nd3.} 32. Qc2 Nd3 {[%mdl 64] Double
Attack, Discovered Attack.  Weighted Error Value: White=0.78/Black=0.02} 0-1

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.23"]
[Round "7.4"]
[White "Caruana, Fabiano"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1-0"]
[ECO "B97"]
[WhiteElo "2823"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "73"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,73,0,-49,8,17,12,2,12,-3,143,151,208,194,200,210,187,146,144,120,132,
142,139,144,130,118,149,153,206,204,240,246,345,193,255,257,506,501,538,537,
485,537,532,508,575,460,977,941,885,760,4614,4586,1650,4132,2835,2191,1294,885]
} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8.
Qd2 Qxb2 9. Rb1 Qa3 10. Be2 Nc6 {B97: Sicilian Najdorf: Poisoned Pawn.} ({
Black should play} 10... Nbd7 $15) 11. Nxc6 $11 bxc6 12. e5 {aiming for Rb3.}
Nd5 {The position is equal.} 13. Nxd5 exd5 {[#]} (13... cxd5 $11 {keeps the
balance.} 14. Rb3 Qc5) 14. e6 $146 ({Predecessor:} 14. O-O dxe5 15. fxe5 Be7
16. Rb3 Bxg5 17. Qxg5 Qc5+ 18. Kh1 O-O 19. Rg3 g6 20. Bd3 {1/2-1/2 (35)
Tsaturian,V-Perfanov,B corr 1985}) 14... f6 (14... Qxa2 15. O-O $18) (14...
fxe6 15. Rb3 $11) (14... Bxe6 $16 15. O-O Qc5+ 16. Kh1 d4) 15. Bh5+ $18 {
[%mdl 1024] White has strong compensation.} Kd8 {[#]} 16. Bh4 d4 (16... Bxe6 $6
17. O-O $14) 17. Bf2 (17. Qxd4 Qa5+ 18. Kf1 Qxh5 $11) 17... Qc3 (17... Qxa2 $2
18. O-O $18) 18. f5 Qxd2+ 19. Kxd2 c5 20. Bf3 Ra7 21. g4 $36 {[%mdl 2048]
White is in control.} g6 22. Bh4 Be7 {[#]} (22... Ke7 $16 {might work better.})
23. Rb6 $1 h5 {White must now prevent ...hxg4.} 24. h3 (24. fxg6 hxg4 25. Bd5 (
25. g7 Rg8 $11) 25... Rg8 $14) 24... Ke8 (24... Rh6 $142 25. Bg3 Rc7) 25. Bg3 (
25. fxg6 Kf8 $18) (25. gxh5 $142 gxf5 26. Rg1) 25... Rc7 (25... Kf8 {was worth
a try.} 26. Bxd6 (26. fxg6 hxg4 27. Bxg4 Kg7 $16) 26... hxg4 27. hxg4 (27. Bxg4
Rb7 $16) 27... Rxh1) 26. Kd3 ({But not} 26. fxg6 $6 h4 $18) 26... hxg4 $2 (
26... Kf8 27. Rxd6 (27. fxg6 hxg4 28. Bxg4 Kg7 $16) (27. Bxd6 Bxd6 28. Rxd6 Ke7
$16) 27... Ra7) 27. hxg4 {White is clearly winning.} Rxh1 28. Bxh1 gxf5 29.
gxf5 Bf8 30. Kc4 Rh7 31. Be4 Be7 (31... Rh3 $142) 32. Bxd6 {And now Rb8! would
win.} Bxd6 33. Rxd6 Bb7 34. Bxb7 Rxb7 35. Rxa6 Rb2 36. Kxc5 Rxc2+ 37. Kxd4 {
Weighted Error Value: White=0.17/Black=0.48} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.23"]
[Round "7.5"]
[White "Giri, Anish"]
[Black "Grandelius, Nils"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2764"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "77"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,77,19,23,27,16,15,16,16,30,31,20,40,34,61,52,43,52,41,47,80,13,13,7,
20,7,6,0,8,6,12,0,16,12,13,13,14,15,12,4,3,0,0,0,27,29,41,29,68,59,139,144,143,
143,181,181,562,526,524,524]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3
a6 6. f3 e5 7. Nb3 Be6 8. Be3 Be7 9. Qd2 h5 10. Nd5 Nxd5 11. exd5 Bf5 {B90:
Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 12. Be2 a5
13. a4 O-O {The position is equal.} 14. O-O Nd7 15. f4 {Threatening fxe5.} exf4
16. Bxf4 {[#]} Rc8 $146 ({Predecessor:} 16... Bg6 17. Bb5 Bf6 18. c4 Qc7 19.
Rae1 Rfd8 20. Bg3 h4 21. Rxf6 hxg3 22. Rff1 gxh2+ {1/2-1/2 (32) Brodda,W (2596)
-Acevedo Villalba,A (2515) ICCF email 2015}) 17. c3 Nf6 18. Be3 Be4 19. Bd4
Nxd5 20. Bf3 (20. Bxh5 $16 Nf6 21. Bf3) 20... Bg5 $11 21. Qe2 Bxf3 22. Qxf3 {
[%mdl 64] [#] Double Attack} Nf6 23. Qf5 ({Of course not} 23. Qxb7 Rb8 $17)
23... Ng4 {And now ...Be3+ would win.} 24. Qxa5 Re8 25. Qxd8 Bxd8 26. Rfe1 Ne5
27. Nd2 Re6 28. Red1 Kf8 29. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} Nc6 30. Bf2 Ne5
31. a5 Rxc3 32. b5 Ng4 33. Bd4 Rd3 34. Nc4 Rxd4 35. Rxd4 $16 Bf6 {[#]} 36. Rdd1
{Black must now prevent a6.} d5 37. Nb6 Ne3 $2 (37... Bxa1 {is a better chance.
} 38. Rxa1 Ne5) 38. Nd7+ $18 Ke7 39. Nxf6 {Weighted Error Value: White=0.06/
Black=0.29} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.23"]
[Round "7.6"]
[White "Firouzja, Alireza"]
[Black "Duda, Jan-Krzysztof"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2749"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,111,0,0,0,0,-7,3,-10,-6,-12,0,-8,0,0,19,0,50,56,65,63,49,55,95,85,
100,60,58,63,68,64,64,59,60,54,74,65,85,87,79,88,91,84,87,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,33,51,52,37,45,2,4,0,0,0,0,0,0,13,21,13,13,13,27,12,17,0,0,0,4,0,21,
9,281,254,211,172,291,273,289,280,531,568,547,397,3211,2270,12845,12845]} 1. d4
Nf6 2. Nf3 d5 3. Bf4 e6 4. e3 Bd6 5. Nbd2 O-O 6. Ne5 c5 7. c3 {D02: 1 d4 d5 2
Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Qc7 8. Bd3 b6 9. h4
$5 {[%mdl 4] The position is equal. Leaves trodden paths.} Ba6 10. Bxa6 Nxa6
11. h5 Nd7 {[#]} 12. Ndf3 $146 ({Predecessor:} 12. h6 g6 13. Nxd7 Qxd7 14. Bxd6
Qxd6 15. Qe2 Nb8 16. Rd1 cxd4 17. exd4 Nc6 18. Nf3 {1/2-1/2 (34) Demchenko,A 
(2655)-So,W (2767) Khanty-Mansiysk 2019}) 12... f6 13. Nd3 cxd4 14. Nxd4 e5 {
[%cal Re5f4]} 15. Ne6 Qc4 16. Nxf8 Bxf8 17. Bg3 Ndc5 18. Nxc5 Nxc5 19. Rh4 e4
20. Qe2 Nd3+ 21. Kf1 f5 22. Kg1 Rc8 23. Rh1 Kf7 24. Kh2 Be7 25. a3 b5 26. Rad1
Ke6 27. Rxd3 Qxd3 $11 28. Qxd3 exd3 29. Rd1 Bxa3 30. bxa3 Rxc3 {[%mdl 4096]
Endgame KRB-KR} 31. Kg1 Rxa3 {Strongly threatening ...b4.} 32. Kf1 b4 {aiming
for ...b3.} 33. Ke1 b3 34. Kd2 {Threatens to win with Kc3.} (34. Rxd3 $2 b2 $1
$19 {[%mdl 512]}) 34... b2 {And now ...Ra1 would win.} (34... a5 $5 {[%cal
Rb3b2]} 35. Rc1 (35. Kxd3 a4 $11) 35... d4 $11) 35. Rb1 Rb3 {...a5 is the
strong threat.} 36. Bc7 d4 $1 37. exd4 {Black must now prevent Ba5.} Kd5 38. f4
g6 39. h6 Kxd4 40. Be5+ Ke4 41. Bxb2 Rb7 42. Re1+ Kxf4 43. Be5+ Kg4 44. Kxd3 {
White wants to play Ra1.} g5 45. Bd4 Rd7 46. Re6 Kg3 47. Rf6 Kg4 48. Ra6 {
Threatening Kc4.} f4 $2 {[%mdl 8192] This move loses the game for Black.} (
48... Kg3 $11) 49. Ke4 $1 $18 (49. Rxa7 Rxa7 50. Bxa7 Kh5 $11) 49... Re7+ 50.
Be5 $1 Rb7 (50... Kg3 {is a better defense.} 51. Ra5 Kxg2 52. Ra2+ Kg3) 51. Bf6
$1 Rb4+ {[#]} 52. Bd4 $1 Kh5 $2 {[#]} (52... Rb7 {was necessary.} 53. Ke5 (53.
Bxa7 Rb2 $11) (53. Rxa7 Rxa7 54. Bxa7 Kh5 $11) 53... Rd7) 53. Rd6 $1 Ra4 54.
Kf5 Ra2 $2 (54... f3) 55. Bf6 Kxh6 56. Rd1 {[%cal Rd1h1] Weighted Error Value:
White=0.05/Black=0.22} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.23"]
[Round "7.7"]
[White "Wojtaszek, Radoslaw"]
[Black "Esipenko, Andrey"]
[Result "0-1"]
[ECO "E20"]
[WhiteElo "2705"]
[BlackElo "2677"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,84,3,0,8,5,12,11,10,-14,24,14,86,88,89,11,15,0,0,0,0,0,0,-21,-21,-24,
-13,-20,-13,-19,-14,-12,-20,-17,-20,-18,-20,-14,0,0,0,-48,-51,-69,-68,-75,-66,
-74,-79,-114,-112,-103,-91,-141,-137,-175,-182,-187,-159,-166,-160,-175,-130,
-139,-87,-69,-69,-504,-447,-531,-520,-532,-540,-522,-517,-475,-466]} 1. d4 Nf6
2. c4 e6 3. Nc3 Bb4 4. f3 d5 5. a3 Be7 6. e4 dxc4 {E20: Nimzo-Indian: 4 g3 and
4 f3.} 7. Be3 {[#]} b5 $146 ({Predecessor:} 7... c5 8. dxc5 Nbd7 9. Bxc4 Bxc5
10. Bxc5 Nxc5 11. Qxd8+ Kxd8 12. Kf2 Ke7 13. Nge2 Nfd7 14. b4 Ne5 15. bxc5 Nxc4
16. Rhb1 b6 17. cxb6 axb6 18. Rb4 Rxa3 19. Rxa3 Nxa3 20. Rxb6 Rd8 {1/2-1/2 (20)
Gyimesi,Z (2586)-Timman,J (2562) Antwerp 2008}) 8. Nxb5 Ba6 $1 {[%cal Ra6b5]
The position is equal.} 9. a4 (9. Qa4 {is interesting.} Nfd7 10. Nc3 O-O 11.
Rd1 c5 12. d5) 9... c6 10. Na3 Bxa3 (10... O-O $11 {remains equal.}) 11. Rxa3
$16 Nbd7 12. Ne2 (12. Qc2 $16) 12... Rb8 $11 13. Ra2 O-O 14. Nc3 Qa5 15. Be2
Rfd8 16. Qc2 c5 17. O-O cxd4 18. Bxd4 Nc5 {[%cal Bd7c5,Bc5b3,Bb3a1][%mdl 32]}
19. Nb5 {[#]} Rxd4 20. Nxd4 Nb3 $1 {[%cal Rb3d4]} 21. Nb5 Bxb5 22. axb5 Qxa2
23. Bxc4 Na1 24. Qc3 Qa4 25. b3 {[#]} Nxb3 {And now ...Nd2! would win.} 26.
Qxb3 (26. Rd1 h5) 26... Qxb3 27. Bxb3 Rxb5 $15 {[%mdl 4096] Endgame KRB-KRN}
28. Rc1 {White threatens Rc8+ and mate.} g5 29. Rc3 Kg7 30. Kf2 h5 31. Ke3 h4
32. g3 h3 $1 33. Bd1 Rb2 34. Be2 g4 35. fxg4 {[#]} Nxe4 $1 {[%mdl 512]} 36. Ra3
{[#]} Ng5 ({Better is} 36... Kf6 $1 37. Kd3 Nc5+ 38. Ke3 a6) 37. Rxa7 $17 Rb3+
38. Kd4 $2 {[%mdl 8192] [#] This costs White the game.} ({White has to play} 
38. Bd3 $1 $15) 38... Rb1 $1 $19 {[%cal Rb1h1] Black is clearly winning.} 39.
Ke3 {[#]} Rh1 $1 {[%cal Rh1h2]} 40. Ra5 Kf6 41. Bf3 Rxh2 42. Ra1 Rb2 {Weighted
Error Value: White=0.30/Black=0.07} 0-1

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.24"]
[Round "8.1"]
[White "Esipenko, Andrey"]
[Black "Carlsen, Magnus"]
[Result "1-0"]
[ECO "B84"]
[WhiteElo "2677"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "75"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,75,26,26,21,22,11,0,0,0,12,0,66,46,53,67,73,50,60,46,139,133,131,130,
127,129,122,125,133,138,186,185,175,189,185,176,178,151,300,305,305,301,311,
319,310,293,357,339,379,372,604,616,568,582,1020,568,943,910,2606,2185,7154,
206,6133,5804]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be2 e6
7. Be3 {7.f4 is becoming the main line.} Be7 8. g4 b5 {B84: Sicilian
Scheveningen: 6 Be2 a6, lines without early Be3.} 9. g5 Nfd7 10. a3 Bxg5 {
The position is equal.} 11. Qd2 Bxe3 12. Qxe3 {[#]} Qh4 $146 (12... Qe7 $11) ({
Predecessor:} 12... Bb7 13. O-O-O Qe7 14. Nb3 Nc6 15. Qg3 Nc5 16. Nxc5 dxc5 17.
Qxg7 Rf8 18. Bg4 Nd4 {1/2-1/2 (32) Frotscher,T (2363)-Gomila Marti,S (2375)
ICCF email 2019}) 13. Rg1 {[%mdl 1024] White has compensation.} g6 14. O-O-O
Qe7 15. f4 Bb7 16. Kb1 Nc6 {White leaves nothing to chance now.} (16... Nc5 $1
$14) 17. Ncxb5 $1 $16 axb5 18. Nxc6 Bxc6 19. Qc3 $1 {[%csl LRc6,LRh8][%mdl 64]
Double Attack} O-O 20. Qxc6 {[%mdl 64] Double Attack} d5 21. exd5 (21. Bxb5 $6
Nf6 $14) 21... Rfc8 {[#]} 22. d6 $1 $36 {[%mdl 2560] White has strong
initiative.} Qd8 23. Qxb5 Rcb8 24. Qc4 Rxa3 {And now ...Qa5 would win.} 25. Qc7
Qe8 (25... Ra4 $16) 26. Rg5 $1 $18 {Bb5 is the strong threat.} Ra4 27. Ra5 (27.
Bb5 $2 Rxb5 $1 28. Rxb5 Qa8 $1 $17) 27... Rab4 {[#]} 28. b3 R4b7 29. Qc3 Qd8
30. Bf3 Rb4 31. Qc7 Qf6 $2 (31... Rc8 32. Ra8 Rxa8 33. Bxa8 Qxa8) 32. Ra8 (32.
Qxd7 $2 {[#] leads to mate.} Rxb3+ $1 {[%mdl 512]} 33. cxb3 Rxb3+ 34. Kc2 Qc3#)
32... Rxa8 33. Bxa8 Qf5 {aiming for ...Rxb3+.} 34. Kb2 ({Not} 34. Qxd7 $2 Rxb3+
35. Kc1 Qxf4+ 36. Rd2 Ra3 $19) 34... Rb5 {Black wants to play ...Rc5.} 35. Qxd7
{Strongly threatening Qe8+.} Rc5 36. Rc1 Qxf4 37. Qe8+ Kg7 {Threatening ...Qd2.
} 38. d7 {Weighted Error Value: White=0.14/Black=0.36} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.24"]
[Round "8.2"]
[White "Duda, Jan-Krzysztof"]
[Black "Anton Guijarro, David"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2743"]
[BlackElo "2679"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,100,19,20,25,14,34,33,27,20,31,25,31,0,27,29,31,26,37,11,26,8,16,0,7,
0,0,2,10,12,22,8,6,10,39,31,68,60,73,40,48,9,57,6,7,7,16,0,0,0,0,0,0,-65,-66,
-100,-103,-150,-20,-14,-18,-7,0,0,0,0,-25,-88,-92,-83,-28,-28,-28,-56,-43,-43,
-50,-47,-26,-25,0,0,0,0,0,-53,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4.
O-O Nf6 5. d3 d6 6. c3 a5 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4
and 5 d3.} 7. Re1 O-O 8. Bg5 h6 {White is slightly better.} 9. Bh4 g5 10. Bg3
Ba7 11. Na3 Bg4 12. Nc2 Bh5 13. h3 Kg7 14. Ne3 Ne7 {[#]} 15. Bb3 $146 (15. Qe2
{feels hotter.} a4 16. b4 Rb8 17. Bb5 Ra8 18. a3) ({Predecessor:} 15. Bh2 g4
16. hxg4 Nxg4 17. Nh4 f5 18. Nxg4 fxg4 19. Bg3 Bxf2+ 20. Bxf2 g3 21. Nf3 gxf2+
22. Kxf2 {0-1 (39) Audi,A (2354)-Mokshanov,A (2449) Moscow 2020}) 15... Qd7 16.
Bc2 (16. Qe2 {is interesting.} a4 17. Bc2 Rfe8 18. Rad1 Qc6 19. a3) 16... Bxe3
17. Rxe3 Ng6 18. d4 {[%cal Rd4e5]} Qb5 19. a4 Qb6 (19... Qxb2 $2 20. Bb3 $18)
20. Ra3 Rfe8 21. Rb3 Qa7 22. Qd2 Rad8 23. h4 Nh7 24. hxg5 hxg5 25. Nh2 c5 26.
Nf1 (26. dxc5 $14 dxc5 27. Rd3 Rxd3 28. Qxd3 (28. Bxd3 Rd8 $11)) 26... Nf4 $11
27. f3 Bg6 {[%cal Rc5d4]} 28. Bf2 Nf6 (28... exd4 $6 29. cxd4 b6 30. Re1 $16)
29. Re1 b6 30. Ne3 Qc7 31. Ra3 (31. Rb5 $11) 31... Rh8 $15 32. Raa1 Rh6 33.
Rad1 {[#] And now dxe5 would win.} cxd4 ({Black should play} 33... d5 $1 $17 {
[%cal Rd5e4]} 34. dxe5 Qxe5 35. exd5 Rdh8) 34. cxd4 $11 Rdh8 {[%csl Gh8][%cal
Rh6h1]} 35. Bg3 N4h5 36. Bh2 Nf4 37. Bg3 d5 {Hoping for ...exd4.} 38. Qc3 (38.
dxe5 $11 Qxe5 {[%mdl 64] Double Attack} 39. Bxf4 Qxf4 40. Nf5+ Bxf5 41. Qxf4
gxf4 42. exf5) 38... Qxc3 $17 39. bxc3 {[#]} exd4 ({Reject} 39... dxe4 $6 40.
dxe5 N6h5 41. Kf2 $11) (39... Rh1+ $1 $17 40. Kf2 Rxe1 41. Rxe1 exd4 42. cxd4
dxe4) 40. Rxd4 $11 dxe4 41. Bxe4 Rh1+ 42. Kf2 Rxe1 43. Kxe1 Rh1+ (43... Ne6 {
keeps more tension.} 44. Rc4 Nxe4 45. fxe4 Re8 46. Bd6 Nf4) 44. Kf2 $1 Nxe4+ (
44... Bxe4 {is more complex.} 45. fxe4 Ne6 46. Rc4 Nc5 47. Kf3 Nfd7) 45. fxe4
Ne6 46. Be5+ Kh7 47. Rd6 (47. Ng4 $11) 47... Ra1 ({Better is} 47... Bxe4 $15
48. Nf1 Nc5) 48. Nd5 {The position is equal.} Bxe4 {Threatens to win with ...
Ra2+.} 49. Nf6+ Kg6 {...Kf5 is the strong threat.} 50. g4 ({Much worse is} 50.
Nxe4 Kf5 $17) 50... Bc2 {Weighted Error Value: White=0.16/Black=0.12} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.24"]
[Round "8.3"]
[White "Harikrishna, Pentala"]
[Black "Firouzja, Alireza"]
[Result "0-1"]
[ECO "D10"]
[WhiteElo "2732"]
[BlackElo "2749"]
[Annotator "TA"]
[PlyCount "112"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,112,27,25,0,8,0,12,14,16,13,34,28,35,12,50,0,0,9,72,0,0,0,0,0,0,0,0,
-20,-12,-5,-5,-28,-31,-21,-20,-44,22,0,0,-18,12,0,36,0,0,0,0,-15,-15,-17,-11,
-15,-21,-16,-12,-14,-15,-91,-83,-82,-69,-102,-32,-68,-62,-222,-226,-219,-208,
-202,-197,-202,-197,-196,-200,-213,-150,-144,-136,-123,-145,-136,-113,-115,
-116,-138,-43,-181,-104,-108,-112,-129,-126,-316,-312,-743,-468,-849,-852,
-1901,-623,-29984,-29985,-29985,-29986]} 1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Bf4
Nc6 5. e3 Bf5 6. Bb5 {D10: Slav Defence: 3 cxd5 (without early Nf3) and 3 Nc3.}
e6 7. Nc3 Nge7 $5 {[%mdl 4] [#] Leaves trodden paths.} 8. Rc1 $146 {The
position is equal.} ({Predecessor:} 8. Nf3 a6 9. Be2 Nc8 10. O-O Be7 11. Rc1
Nb6 12. Ne5 Nxe5 13. Bxe5 O-O 14. Qb3 {1/2-1/2 (30) Ubilava,E (2560)
-Komljenovic,D (2495) San Sebastian 1992}) 8... a6 9. Be2 f6 10. g4 Bg6 11. Nf3
Bf7 12. Bg3 h5 13. g5 Ng6 (13... h4 $1 $11 14. Nxh4 (14. Bxh4 Nf5 $11) 14...
fxg5) 14. gxf6 (14. h4 $1 $16) 14... h4 $11 15. fxg7 Bxg7 16. Be5 Ngxe5 17.
dxe5 Nxe5 18. Nd4 Rc8 19. O-O Nc6 20. Bg4 Nxd4 21. exd4 Rc6 22. Ne2 h3 ({
Black should play} 22... Qg5 $15 23. h3 Rxc1 24. Qxc1 Qxc1 25. Rxc1 Kd7) 23.
Rc3 Rh4 24. Rg3 Qc7 25. Re1 Kf8 26. Qd3 e5 27. Qa3+ Qd6 28. Qxd6+ Rxd6 29. Bxh3
exd4 30. Nc1 Rdh6 31. Bg2 Rxh2 32. Nd3 R2h5 33. f4 (33. Nc5 $11) 33... Rc6 $17
34. Bf3 Rhh6 35. Rg2 Rhg6 (35... Rh3 $17 36. Rf1 Bh6) 36. f5 Rh6 37. Nf4 $2 (
37. Rh2 $1 $15) 37... d3 $1 $19 38. Nxd3 Bd4+ 39. Nf2 Rc2 40. Kf1 Rxb2 41. Re2
Rb1+ 42. Re1 Rhb6 43. Nd3 Bc3 44. Rxb1 Rxb1+ 45. Kf2 Ke7 46. Rh2 Kf6 47. Ke3
Kg5 (47... Rf1 $17 48. Rh7 b5) 48. Nc5 {[#]} ({Better is} 48. Rh7 $15 d4+ {
[%mdl 64] Discovered Attack} 49. Kf2) 48... Rb5 ({Much less strong is} 48...
Kxf5 49. Bxd5 Re1+ 50. Kd3 $15) ({Black should try} 48... b6 $1 $19 {[%cal
Rb6c5]} 49. Nd7 Kxf5) 49. Rh7 $17 Bg8 50. Rc7 Kxf5 {White must now prevent ...
d4+.} 51. Nxb7 $2 {[#]} (51. Kd3 $17 Be5 52. Rc8) 51... d4+ $1 $19 {[%mdl 64]
Discovered Attack} 52. Kf2 $2 (52. Kd3 Rb2 53. Rxc3 dxc3 54. Kxc3 Rxa2 55. Bd1)
52... Rb2+ 53. Be2 (53. Kg1 $142 Kf4 54. Bg2) 53... Kf4 54. Nd6 Bd2 (54... Be6
$142 55. Rb7 Rd2) 55. Kf1 Rb1+ 56. Bd1 d3 {Weighted Error Value: White=0.55/
Black=0.25} 0-1

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.24"]
[Round "8.4"]
[White "Vachier-Lagrave, Maxime"]
[Black "Van Foreest, Jorden"]
[Result "1/2-1/2"]
[ECO "C78"]
[WhiteElo "2784"]
[BlackElo "2671"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,64,29,34,47,41,30,58,48,51,52,63,55,90,9,9,14,38,32,39,-18,-16,-18,0,
0,-8,-37,18,14,16,4,32,35,27,30,42,32,35,33,37,11,26,0,0,0,0,0,0,0,0,0,0,0,0]} 
1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 6. c3 O-O 7. d4 Ba7 8. Bg5
{C78: Ruy Lopez: Archangelsk and Möller Defences.} h6 9. Bh4 d6 10. Bxc6 {
White is slightly better.} bxc6 11. dxe5 dxe5 12. Nxe5 {[#]} Qe7 $146 ({
Predecessor:} 12... g5 13. Bg3 Qxd1 14. Rxd1 Bb7 15. Nd2 Rae8 16. Re1 Re6 17.
Nec4 Rfe8 18. Bxc7 Ng4 {1-0 (40) Zieher,H (2300)-Tabatt,H (2303) Saarbruecken
2013}) 13. Nxc6 ({White should play} 13. Nf3 $16 {And now e5 would win.} g5 14.
Bg3) 13... Qxe4 $11 {[%mdl 64] [#] Double Attack} 14. Nxa7 Bh3 15. gxh3 Rfd8 {
[%cal Rd8d1]} 16. Nd2 Qxh4 17. Qf3 Rxa7 18. Nb3 c5 19. Qg3 Qh5 (19... Qc4 $15)
20. Rae1 Rd5 {[#] Hoping for ...Rg5.} 21. f4 ({Much worse is} 21. Qb8+ Kh7 $15)
21... Rad7 22. Re5 Rxe5 23. fxe5 Ne4 24. Qg4 Qxg4+ 25. hxg4 $14 {[%mdl 4096]
Endgame KRN-KRN} Rd5 26. Re1 Nd2 {aiming for ...Nf3+.} 27. Nxd2 Rxd2 $11 {
KR-KR. The position is equal.} 28. e6 fxe6 29. Rxe6 Rxb2 30. Rxa6 Rc2 31. Rc6
Rxc3 32. Kg2 Ra3 {Weighted Error Value: White=0.17/Black=0.09} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.24"]
[Round "8.5"]
[White "Caruana, Fabiano"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "D00"]
[WhiteElo "2823"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "96"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,96,3,18,0,8,-7,11,-5,5,-8,0,0,0,0,0,0,0,-24,-30,-33,-33,-32,-24,-29,
-24,-30,-23,-36,-31,-34,-12,-37,-27,-18,0,-16,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,
10,10,10,10,21,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
} 1. d4 Nf6 2. Nc3 d5 3. Bf4 g6 4. e3 Bg7 5. Be2 c6 6. Qd2 {[#] D00: 1 d4 d5:
Unusual lines.} a5 $146 ({Predecessor:} 6... Nbd7 7. h4 b5 8. h5 Nb6 9. h6 Bf8
10. Nf3 e6 11. a3 a5 12. Ne5 Bb7 {0-1 (48) Gustain,M (2115)-Ruff,M (2211)
Deizisau 2016}) 7. Nf3 Bg4 8. Ne5 Bxe2 9. Qxe2 a4 10. a3 Nh5 11. h4 Nxf4 12.
exf4 h5 13. O-O-O Nd7 14. g4 hxg4 15. Qxg4 Nf6 16. Qf3 e6 17. Kb1 Nh5 18. Ne2
Bf6 19. Ng3 Qc7 20. Qe3 Qe7 21. Rde1 Ng7 {The position is equal.} 22. Qd2 Rxh4
23. Rxh4 Bxh4 24. Rh1 Nf5 25. Nxf5 gxf5 26. Qc3 {next Nxc6! is good for White.}
Bf6 27. Nxc6 $1 Qc7 28. Qg3 $1 {[%cal Rg3g8] [#] Black must now prevent Qg8+.}
Kd7 29. Ne5+ Bxe5 30. fxe5 $11 {[%mdl 4096] Endgame KQR-KQR} Rd8 31. Qg7 Kc8 $1
32. Rh8 {And now Rxd8+ would win.} Qe7 33. Rxd8+ Kxd8 {KQ-KQ} 34. Qg8+ Kc7 35.
Ka2 f6 36. exf6 Qxf6 37. Qg3+ (37. c3 {is more complex.} f4 38. Qh7+ Kb8 39.
Qh5 Kc7 40. b3) 37... f4 38. Qc3+ Kb8 $1 39. f3 Qg6 40. b3 axb3+ 41. Kxb3 Qg1
42. Kb2 Qf1 43. a4 Qa6 44. Qb4 Ka7 45. Kb3 Qf1 46. Qa5+ Kb8 47. Qd8+ Ka7 {
[#] aiming for ...Qc4+.} 48. Qa5+ Kb8 {Weighted Error Value: White=0.04/
Black=0.03} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.24"]
[Round "8.6"]
[White "Grandelius, Nils"]
[Black "Wojtaszek, Radoslaw"]
[Result "1/2-1/2"]
[ECO "B18"]
[WhiteElo "2663"]
[BlackElo "2705"]
[Annotator "TA"]
[PlyCount "109"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,109,14,19,12,24,21,6,0,0,0,10,0,33,18,30,22,22,0,0,0,0,-43,-42,-47,
-34,-31,-29,-23,-15,-19,-14,0,0,-6,8,-19,0,0,11,11,13,14,24,-18,-15,-8,15,18,
20,0,2,3,4,0,0,-29,-21,-24,-39,-28,-22,-43,-25,-46,-47,-65,0,0,0,0,0,8,8,2,8,8,
8,8,17,12,17,15,18,10,19,11,29,28,25,8,8,8,8,8,8,0,8,0,10,0]} 1. e4 c6 2. d4 d5
3. Nc3 dxe4 4. Nxe4 Bf5 5. Ng3 Bg6 6. h4 h6 7. Bd3 {[#] aiming for Bxg6. B18:
Classical Caro-Kann: 4...Bf5 sidelines.} (7. Nf3 {looks sharper.} Nd7 8. Bf4
Ngf6 9. Bd3 Nd5 10. Bc1) 7... Bxd3 8. Qxd3 e6 9. N1e2 Nf6 10. Bd2 Nbd7 11.
O-O-O Qc7 12. Kb1 {[#]} c5 $146 ({Predecessor:} 12... Be7 13. Rhg1 Ng4 14. f3
Nf2 15. Qb3 Nxd1 16. Rxd1 Bxh4 17. Bf4 Qb6 {0-1 (44) Leccia,T (1211)-Jubin,T 
(1690) St Denis 2016}) 13. dxc5 Nxc5 14. Qc4 Be7 15. Bf4 Qb6 16. Nd4 (16. Be3 {
with more complications.} O-O 17. Nf4 Rac8 18. Nfh5 Qa5 19. Bd2) 16... O-O 17.
Qb5 Qxb5 18. Nxb5 Ng4 19. Rdf1 Rfd8 20. Nc3 f5 21. f3 Nf6 22. Nge2 a6 23. Be3
Kf7 24. g4 Nd5 25. Nxd5 Rxd5 26. Nf4 Rd7 27. Rhg1 {next gxf5 is good for White.
} e5 28. Ne2 Rc8 29. gxf5 Bxh4 30. Nc3 b5 31. Bxc5 Rxc5 32. Ne4 Rc6 33. Rg4 Bd8
34. c3 h5 35. Rg2 h4 36. Rfg1 Kf8 37. Rg4 Rf7 38. Kc2 Be7 (38... Rh6 $15) 39.
Kd2 $11 Rh6 40. Ke2 h3 41. f6 Bxf6 42. Rh1 Bd8 43. Rg3 h2 44. Rg2 Rh3 45. Rf2
g5 46. Rhxh2 Rh4 47. Rhg2 Rg7 48. Rf1 Be7 49. Rfg1 Kf7 50. b3 Ke6 {The
position is equal.} 51. Ke3 Kd5 52. Rd1+ Ke6 53. Rdg1 Kd5 54. Rd1+ Ke6 55. Rdg1
{Weighted Error Value: White=0.06/Black=0.06} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.24"]
[Round "8.7"]
[White "Donchenko, Alexander"]
[Black "Tari, Aryan"]
[Result "1/2-1/2"]
[ECO "E04"]
[WhiteElo "2668"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "71"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,71,4,10,8,6,10,6,4,6,4,8,6,10,14,7,5,8,8,20,0,4,5,9,0,5,0,7,0,31,12,
12,-14,0,0,0,-21,0,0,0,-24,0,0,0,0,0,-2,-2,-2,0,0,0,0,0,0,0,-2]} 1. d4 Nf6 2.
c4 e6 3. g3 d5 4. Bg2 dxc4 5. Nf3 c5 6. O-O Nc6 7. Ne5 Bd7 8. Na3 cxd4 9. Naxc4
Be7 10. Bf4 {E04: Open Catalan: 5 Nf3.} Rc8 11. Nxd7 Qxd7 12. Ne5 Nxe5 13. Bxe5
{[#]} d3 $146 ({Predecessor:} 13... Rd8 14. Qd3 O-O 15. Rfd1 Qa4 16. b3 Qa5 17.
Bxd4 b6 18. Qf3 e5 19. Bc3 Bb4 20. Rxd8 Rxd8 21. Bxb4 Qxb4 {1/2-1/2 (44)
Gonzaga Grego,L (2401)-Klauner,T (2436) ICCF email 2018}) 14. Qxd3 Qxd3 15.
exd3 b6 $1 16. Bb7 Rd8 17. Bc6+ Kf8 18. a4 Bd6 19. Bc3 Rc8 20. Bb7 Rc7 21. Bg2
Ke7 22. a5 g6 23. Rfe1 Rd8 24. Rad1 Rcd7 25. Bc6 Rc7 26. Bg2 Rcd7 27. Bc6 Rc7
28. Bf3 Rcd7 (28... b5 {looks sharper.} 29. Kg2 b4 30. Bd4 Nd7 31. Rd2 f6) 29.
d4 {The position is equal.} Kf8 30. Bc6 Re7 31. d5 (31. axb6 {keeps more
tension.} axb6 32. Ra1 Rc7 33. Bg2 Rc4 34. Ra7) 31... Nxd5 32. Bxd5 exd5 33.
Rxd5 Rxe1+ 34. Bxe1 Ke7 35. axb6 axb6 36. Kf1 {A rather calm draw.  Weighted
Error Value: White=0.06/Black=0.04} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.26"]
[Round "9.1"]
[White "Carlsen, Magnus"]
[Black "Grandelius, Nils"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2862"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "129"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,129,25,28,0,10,0,0,0,0,0,25,12,26,6,9,0,11,7,33,42,33,43,57,53,58,23,
21,25,22,16,33,16,28,21,25,0,0,3,12,0,0,0,14,0,85,85,81,71,88,80,78,20,108,110,
108,97,97,97,97,97,97,97,173,162,270,270,263,261,474,173,239,180,216,242,243,
246,220,148,184,143,178,178,178,178,163,163,163,163,171,0,164,164,156,135,214,
222,263,264,263,263,263,263,255,255,255,250,248,248,398,398,946,398,2206,2181,
1433,1370,29968,29969,29969,29969,6115,6115]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4.
Nxd4 Nf6 5. Nc3 a6 6. Qd3 {B90: Sicilian Najdorf: Unusual White 6th moves, 6
Be3 Ng4 and 6 Be3 e5.} e6 7. a4 Nc6 8. Nxc6 {The position is equal.} bxc6 9.
Qg3 {[#]} Bb7 $146 ({Predecessor:} 9... d5 10. Bd3 g6 11. O-O Bg7 12. a5 O-O
13. Re1 d4 14. Nb1 Nh5 15. Qf3 e5 {1/2-1/2 (40) Oparin,G (2604)-Gelfand,B 
(2724) Zuerich 2017}) 10. Be2 Be7 11. Bf4 {next 0-0-0 is good for White.} e5
12. Be3 (12. Qxg7 $2 Rg8 $19) 12... O-O 13. O-O Kh8 14. a5 Nd7 15. Rfd1 f5 16.
exf5 d5 17. Na4 d4 18. Bd2 c5 19. Qh3 Bg5 20. Bxg5 Qxg5 21. Re1 $36 {[%mdl
2048] White is more active.} Be4 (21... Qxf5 $6 22. Qxf5 Rxf5 23. Bg4 $16) 22.
Bd3 Bxf5 23. Bxf5 Rxf5 24. Nb6 Nxb6 25. axb6 h6 26. Qd3 Rb8 (26... Raf8 $1 $11
{keeps the balance.}) 27. Rxa6 $16 Rf6 28. g3 Rfxb6 29. Rxb6 Rxb6 {[%mdl 4096]
Endgame KQR-KQR} 30. f4 (30. b3 $16) 30... Qd8 (30... c4 $1 $11 {remains equal.
} 31. fxg5 (31. Qxc4 exf4 32. Re8+ Kh7 $11) 31... cxd3 32. cxd3 hxg5) 31. Rxe5
Rxb2 32. Rxc5 Qa8 33. Kf2 Rb8 34. Qf3 Qa7 35. Qd5 Qa1 (35... d3 $16 36. cxd3
Qb6) 36. Qe5 $18 Qb2 (36... Qa8 $142 37. h4 Rg8 38. Qxd4 Rd8) 37. Rc6 {White
wants to mate with Rxh6+.} Kh7 38. Rc7 {[%csl Gc7][%cal Re5g7]} Rg8 (38... d3
39. Qf5+ Kg8) 39. Kg2 $2 (39. f5 {Strongly threatening f6.} Qc1 40. f6 (40.
Qxd4 Qg5 $18) 40... Qd2+ 41. Kf3 Qd1+ 42. Kg2) 39... Qb4 (39... Kh8 {was worth
a try.} 40. Kh3 Qa1) 40. Qe4+ Kh8 41. Rd7 Qd2+ 42. Kh3 Qd1 43. Re7 ({Don't play
} 43. Rxd4 $6 Qh5+ 44. Kg2 Re8 $16) 43... Qh5+ 44. Kg2 Rc8 45. f5 {Threatens
to win with f6.} Qd1 46. Re8+ Rxe8 47. Qxe8+ {KQ-KQ} Kh7 48. Qe4 Kh8 49. Qe8+
Kh7 50. Qg6+ $1 Kh8 51. f6 $1 {[%csl Gf6][%cal Rg6g7]} Qe2+ (51... Qd2+ $16 {
is a better defense.} 52. Kf3 Qe3+ 53. Kg4 gxf6) 52. Kh3 {[%csl Gf6][%cal
Rg6g7]} Qe6+ 53. Kh4 {[%csl Gf6][%cal Rg6g7]} gxf6 54. Qxh6+ Kg8 55. Qg6+ Kf8 {
[#]} 56. g4 $1 Qe5 {[%cal Re5h2]} 57. h3 Ke7 58. Qf5 {Qxe5+ is the strong
threat.} Qe3 {[#]} (58... Qb8 {was called for.} 59. Qc5+ {[%mdl 64] Double
Attack} Kf7 60. Qxd4 Qf8) 59. Kh5 $1 Qxh3+ 60. Kg6 Kd6 $2 (60... Qh8 61. Qe4+ {
[%mdl 64] Double Attack} Kd7 62. Qxd4+ Ke7 63. Qc5+ Ke6 64. Qc4+ Ke5 65. Qc7+
Kd4 66. Qf4+ Kd5 67. Qxf6 Qg8+ 68. Qg7 Qc8 69. Qf7+ Kd4 70. Qf6+ Ke3) 61. Kxf6
Qe3 62. g5 Qe7+ 63. Kg6 Qe8+ 64. Kg7 Qe7+ 65. Kg8 {Weighted Error Value:
White=0.14/Black=0.34} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.26"]
[Round "9.2"]
[White "Tari, Aryan"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "B51"]
[WhiteElo "2625"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,64,8,0,8,0,0,14,15,16,22,22,22,20,0,12,12,26,25,18,14,25,25,24,22,19,
10,22,16,15,5,25,0,0,-10,0,0,0,-5,-5,-5,-5,-4,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 
1. e4 c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Nxd4 Ngf6 6. Bd3 {B51: Sicilian:
Moscow Variation (3 Bb5+) without 3...Bd7.} Nc5 7. Nc3 a6 8. O-O g6 9. Nb3 {[#]
} Nxd3 $146 ({Predecessor:} 9... b6 10. f4 Nxd3 11. cxd3 Bg7 12. Qe1 O-O 13.
Qh4 b5 14. f5 b4 15. Ne2 Qb6+ {0-1 (31) Large,P-Nunn,J London 1977}) 10. cxd3
Bg7 11. a4 Bg4 12. f3 Qb6+ 13. d4 Be6 14. Ra3 O-O 15. Be3 Rab8 16. Re1 {
[#] Black must now prevent d5.} Bxb3 17. Rxb3 Qa5 18. Qd3 Rfc8 19. Bd2 Qc7 20.
Rb4 e6 {The position is equal.} 21. Rc1 d5 22. e5 {[#] Strongly threatening
Ne2.} Nd7 23. Ne2 Qd8 24. Rxc8 Qxc8 25. Rb3 Qc4 26. a5 b5 27. Nc1 Qxd3 28. Nxd3
Rc8 29. Nb4 Nb8 30. Rc3 Rc4 31. b3 $1 {[%cal Rb3c4]} Rxc3 32. Bxc3 Bf8 {
A rather calm draw.  Weighted Error Value: White=0.02/Black=0.02} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.26"]
[Round "9.3"]
[White "Van Foreest, Jorden"]
[Black "Donchenko, Alexander"]
[Result "1/2-1/2"]
[ECO "C84"]
[WhiteElo "2671"]
[BlackElo "2668"]
[Annotator "TA"]
[PlyCount "64"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,64,11,21,18,7,0,0,0,0,0,0,-1,0,0,9,10,5,5,31,0,16,0,30,27,27,26,31,
15,22,12,16,16,16,16,16,16,16,16,16,16,16,16,16,0,16,16,16,0,16,0,16]} 1. e4 e5
2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. a4 Bd7 9. h3 {
C84: Closed Ruy Lopez: Unusual White 6th moves.} O-O 10. Nc3 Na5 11. Ba2 b4 {
[#]} 12. Ne2 $146 ({Predecessor:} 12. Nd5 Nxd5 13. Bxd5 c6 14. Ba2 c5 15. Nd2
Rb8 16. Nc4 Nc6 {1/2-1/2 (16) Brandberg Soeder,J (2266)-Andersen,J (2284) ICCF
email 2010}) 12... c5 13. Ng3 Rb8 14. Nd2 Qc8 15. Nc4 Nxc4 16. Bxc4 Be6 17. a5
g6 18. Bg5 Bxc4 19. dxc4 Qe6 20. Qd3 Rfd8 21. b3 Nh5 {The position is equal.}
22. Be3 Nxg3 23. fxg3 h5 24. Qe2 Kg7 25. Rf2 Rh8 26. Raf1 Rbf8 27. Qd3 f6 28.
Bd2 Rf7 29. Be3 Rhf8 30. Qd2 {Hoping for Bh6+.} Rh8 31. Qd3 Rhf8 32. Qd2 {
Bh6+ is the strong threat.} Rh8 {An uneventful encounter.  Weighted Error
Value: White=0.06/Black=0.04} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.26"]
[Round "9.4"]
[White "Wojtaszek, Radoslaw"]
[Black "Caruana, Fabiano"]
[Result "0-1"]
[ECO "E94"]
[WhiteElo "2705"]
[BlackElo "2823"]
[Annotator "TA"]
[PlyCount "78"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,78,33,53,0,0,0,0,0,0,0,0,0,0,-8,0,0,-6,-23,-23,-15,-8,-48,-53,-37,
-27,-25,-27,-18,0,0,0,0,0,0,0,-35,-24,-37,-39,-31,-38,-47,-47,-83,-66,-72,-61,
-77,-70,-103,-98,-247,-196,-233,-97,-725,-676,-791,-802,-754,-777,-768,-768,
-747,-747,-737,-736]} 1. c4 Nf6 2. Nf3 d6 3. d4 g6 4. Nc3 Bg7 5. e4 O-O 6. Be2
e5 7. O-O Bg4 8. Be3 {E94: King's Indian: Classical: 6 Be2 e5 7 0-0: Various
Black 7th moves.} (8. d5 $14) 8... Bxf3 $5 {[%mdl 4] A promising side line.} 9.
Bxf3 exd4 $1 10. Bxd4 {The position is equal.} Nc6 11. Be3 Re8 12. Qd2 Nd7 13.
Rad1 {[#]} Bxc3 $146 ({Predecessor:} 13... Nc5 14. Rfe1 a5 15. b3 Bxc3 16. Qxc3
Nxe4 17. Bxe4 Rxe4 18. Bh6 Re5 19. Rxe5 Nxe5 20. f4 Qh4 21. fxe5 Qxh6 22. exd6
cxd6 23. Rxd6 Re8 24. h3 Qh4 25. Qd4 {1/2-1/2 (25) Sirota,A (2384)-Salceanu,V 
(2512) ICCF email 2000}) 14. Qxc3 Qf6 15. Qc1 Nc5 16. Qb1 Qe6 17. Rfe1 Qxc4 {
[%cal Rc5e4]} 18. b3 Qc3 19. Bd2 Qf6 20. Bc1 h5 21. Bb2 Ne5 22. Be2 h4 23. Qc1
{f4 is the strong threat.} g5 ({But not} 23... Nxe4 $2 24. f4 $18) 24. Bb5 Re7
25. Re3 Qg6 26. Be2 Rae8 27. Qc2 Ne6 28. f3 Nf4 29. Bf1 c6 30. Qf2 Re6 31. Rc3
d5 32. g3 (32. Re3 $17 {was necessary.}) 32... hxg3 $19 ({Inferior is} 32...
dxe4 33. gxf4 e3 34. Qe2 $11) 33. hxg3 {[#]} dxe4 (33... g4 $1 $19 {has better
winning chances.} 34. Bc1 Nh3+ 35. Bxh3 gxh3) 34. gxf4 $4 {[%mdl 8192]} (34.
fxe4 $17 Nh5 35. Qf5) 34... gxf4+ {Black is clearly winning.} 35. Qg2 exf3 ({
Not} 35... Nxf3+ 36. Rxf3 exf3 37. Qxg6+ fxg6 38. Bc4 $11) 36. Qxg6+ Rxg6+ 37.
Kh1 f2 38. Bh3 {[#]} Nc4 $1 {[%mdl 512]} 39. Rxc4 Re1+ {[%mdl 64] Double
Attack.  Weighted Error Value: White=0.40/Black=0.06} 0-1

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.26"]
[Round "9.5"]
[White "Firouzja, Alireza"]
[Black "Esipenko, Andrey"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2749"]
[BlackElo "2677"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,81,3,7,0,0,0,0,0,0,0,0,-7,2,-14,0,-27,0,0,-2,-62,-18,-20,-12,-22,-6,
-39,-18,-39,-34,-74,-79,-73,-30,-62,-65,-62,18,0,0,0,0,-11,-8,-58,-14,-62,-41,
-51,-40,-56,-14,-54,0,-44,-41,-50,0,0,0,0,0,0,0,-45,-45,-40,-40,-54,0,0,0,-22]
} 1. d4 Nf6 2. Nf3 d5 3. Bf4 e6 4. e3 c5 5. Nbd2 Nc6 6. c3 Nh5 7. Bg5 {D02: 1
d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} f6 8. Bh4 g6
{[#]} 9. h3 $146 ({Predecessor:} 9. Bd3 cxd4 10. cxd4 Bd7 11. O-O Be7 12. Rc1
O-O 13. Nb3 b6 14. a3 a5 15. Re1 {0-1 (45) Demchenko,A (2641)-Fedoseev,V (2678)
chess.com INT 2020}) 9... cxd4 10. cxd4 Bd6 11. Bd3 O-O 12. a3 (12. g4 $5 {
[%cal Rg4h5]} Ng7 13. O-O $11) 12... Qc7 13. Qc2 Kh8 14. g4 Ng7 15. b4 ({
White should try} 15. O-O-O $11) 15... a6 16. Rc1 Ne8 17. Qb2 Kg8 18. g5 f5 19.
Nb3 Ng7 20. Na5 Bd7 21. O-O Rae8 22. Nxc6 Bxc6 23. a4 {[%cal Ba3a4,Ba4b5][%mdl
32]} Nh5 (23... Qe7 $15 24. b5 axb5 25. axb5 Bd7) 24. b5 axb5 25. axb5 Qb6 26.
Rc2 Bd7 27. Re1 Rc8 (27... Ra8 {feels hotter.} 28. Rc3 f4 29. e4 Ng7 30. Ne5
Bxe5 31. dxe5 Ra4) 28. Kg2 Rxc2 29. Qxc2 Rc8 ({But not} 29... Bxb5 $2 30. Qb1
$18) 30. Qd2 Qa7 ({Avoid the trap} 30... Bxb5 $2 31. Rb1 $18) 31. Qb2 Qb6 ({
Better is} 31... Ra8 $15) 32. Re2 Qa5 33. Qb1 Rc3 34. Ra2 Ra3 35. Rxa3 Qxa3 36.
Qc2 Qa5 37. Qe2 Qc3 38. Qd2 Qxd2 39. Nxd2 b6 (39... f4 $15) 40. Nf3 $11 Kf7 41.
Be2 {Weighted Error Value: White=0.18/Black=0.18} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.26"]
[Round "9.6"]
[White "Giri, Anish"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2764"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "139"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,139,4,29,5,0,-22,10,3,43,-14,-13,0,-16,-18,-18,-18,0,-8,-1,-10,0,0,
57,0,59,64,54,65,62,63,45,48,138,12,6,0,7,0,0,19,57,22,10,0,17,21,14,24,41,41,
40,57,46,0,0,0,0,0,46,20,0,0,0,0,49,62,143,113,150,146,200,181,173,154,147,184,
185,143,208,199,198,170,470,470,409,362,545,541,423,427,584,584,584,580,451,
451,451,451,1199,580,580,580,29964,29966,29962,0,6285,0,29957,10191,6613,5212,
6737,11944,29972,29973,29973,29974,29974,29975,29971,29976,29976,29977,29977,
29978,29978,29979,29979,29980]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5.
Nc3 a6 6. h3 e5 7. Nf3 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3
Ng4 and 6 Be3 e5.} Be7 {The main line 7...Be7 scores better than 7...Qc7.} 8.
g4 O-O 9. g5 {[#] The position is equal.} Nh5 $146 ({Predecessor:} 9... Ne8 10.
Be3 Be6 11. Qd2 Nd7 12. O-O-O b5 13. Kb1 Nb6 14. Rg1 g6 15. Nh2 Rc8 {1-0 (41)
Nestorovic,N (2469)-Yudasin,L (2481) New York 2020}) 10. Bc4 (10. h4 $14) 10...
Be6 $11 11. Bb3 g6 12. Be3 Nd7 13. Qd2 Rc8 14. O-O-O Nc5 15. Bxc5 Rxc5 16. h4
Nf4 (16... Qa5 $11) 17. Kb1 (17. Ne1 $14) 17... Qa5 ({Black should play} 17...
Bg4 $11 18. Qe3 Qc8) 18. Ne1 Rfc8 {[%cal Rc5c3]} 19. Nd3 Nxd3 20. Qxd3 Rxc3 21.
bxc3 d5 ({Black should try} 21... Rxc3 $14 22. Qe2 Qb4) 22. exd5 (22. Qd2 $16)
22... Bf5 23. Qd2 Bd6 $1 24. c4 Qb6 {Threatens to win with ...Rxc4.} 25. Ka1 a5
{Black wants to play ...a4.} 26. c3 {aiming for h5.} a4 27. Bc2 e4 28. Bxa4 {
Strongly threatening Rb1.} Rxc4 29. Bb3 Rc5 30. Rhe1 {Black must now prevent
f3.} Be5 31. Re3 Qd6 32. Kb2 b5 $1 33. a3 Rc8 34. Ra1 b4 35. axb4 Qxb4 36. d6 {
And now d7 would win.} Rb8 37. Ra3 Qb7 38. Kc1 {Qd5 is the strong threat.} Qd7
{Black is now going downhill.} (38... Qb5 $14) 39. Qd5 Bxd6 {[#]} 40. Ra6 {
[%cal Ra6d6]} Rd8 {[#]} (40... Bf4 $16 {was called for.}) 41. Rxd6 $1 $18 {
[%mdl 512]} Qxd6 42. Qxf7+ Kh8 43. Qf6+ Qxf6 44. gxf6 {[%mdl 4096] Endgame
KRB-KRB} Rd6 (44... h6 $16 45. f7 g5) 45. f3 Rxf6 46. fxe4 Be6 {[#]} (46... Bd7
47. Bd5 Rf4) 47. e5 $1 Rf1+ 48. Kb2 Bxb3 (48... Bd7 $142 49. Bd5 h6) 49. Kxb3 {
KR-KR} Kg7 50. c4 Rb1+ 51. Ka4 Kf7 52. c5 Ke6 53. c6 Rc1 54. Kb5 Rc2 (54...
Rb1+ $142 55. Ka6 Rc1) 55. Re1 Rc3 56. Kb6 Rb3+ 57. Ka6 Ra3+ 58. Kb6 (58. Kb7
$142 Rb3+ 59. Kc8 Rb4 60. Rh1 Kxe5 61. c7 Rc4 62. Re1+ Kf5 63. Ra1) 58... Rb3+
59. Ka6 (59. Ka7 $18 Rc3 60. Kb7 Rb3+ 61. Kc8) 59... Ra3+ $1 60. Kb7 Rb3+ 61.
Kc8 Rb4 62. c7 Rxh4 63. Rc1 {White mates.} Rf4 {[#]} 64. Kb7 $1 Rf7 65. Re1 g5
66. Kb8 Rf8+ 67. c8=Q+ Rxc8+ 68. Kxc8 h5 69. Kc7 h4 70. Kc6 {Weighted Error
Value: White=0.39/Black=0.45} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.26"]
[Round "9.7"]
[White "Anton Guijarro, David"]
[Black "Harikrishna, Pentala"]
[Result "1/2-1/2"]
[ECO "B56"]
[WhiteElo "2679"]
[BlackElo "2732"]
[Annotator "TA"]
[PlyCount "89"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,89,56,37,52,41,39,49,52,51,43,20,27,34,30,30,33,33,58,45,56,52,53,53,
53,45,45,45,53,53,53,53,53,53,53,51,51,51,52,48,66,53,53,53,58,56,58,35,44,41,
44,39,53,52,52,25,36,0,52,29,41,36,41,23,55,0,28,0,60,63,68,43,39,42,51,50,77,
51]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Bb5+ Nbd7 7. Nf5 a6
8. Ba4 b5 {B56: Classical Sicilian: Unusual Lines.} 9. Bb3 Nc5 10. Bg5 Bxf5 {
White is slightly better.} 11. exf5 Be7 12. Bxf6 Bxf6 13. Qd5 {[%csl Gb3][%cal
Rd5f7] [#]} O-O ({Reject} 13... Nxb3 $6 14. Qc6+ Kf8 15. axb3 $16) 14. Ne4 Qa5+
15. Ke2 Qb4 16. Kf3 {[#]} Be7 $146 ({Predecessor:} 16... Nxe4 17. Qxe4 Qc5 18.
Rhd1 Rac8 19. a4 Qb6 20. axb5 axb5 21. g3 h6 22. Ra2 Rc5 {1/2-1/2 (56) Soffer,
R (2535)-Bykhovsky,A (2455) Tel Aviv 1995}) 17. Rhd1 Rac8 18. c3 Qxe4+ 19. Qxe4
Nxe4 20. Kxe4 Rfd8 21. Rd3 Kf8 22. Rad1 a5 23. a3 Rc7 24. Rd5 Rb8 25. g3 Rb6
26. h4 Rcc6 27. R5d3 Bd8 28. Bd5 Rc8 29. Kf3 h6 30. Ra1 Rbb8 31. Rd2 Rc5 32.
Ke4 Rc7 33. f3 Rc5 34. Rh2 Rbc8 35. Rd2 Rb8 36. Rg2 Rbc8 37. Rh2 Bb6 38. Rd2
Bd8 39. Rh2 Bb6 40. Rd2 Bd8 41. Bb3 R8c6 42. Rd5 Ke7 43. Rxc5 dxc5 44. Bd5 Rb6
45. b4 {Weighted Error Value: White=0.09/Black=0.04} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.27"]
[Round "10.1"]
[White "Caruana, Fabiano"]
[Black "Carlsen, Magnus"]
[Result "1/2-1/2"]
[ECO "E01"]
[WhiteElo "2823"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,83,0,29,27,24,22,30,16,12,29,23,15,4,10,25,32,27,25,14,0,0,0,73,66,53,
72,72,68,64,70,78,29,43,34,28,37,41,31,44,32,46,46,46,46,49,45,55,28,33,32,27,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 Nf6 2. c4 e6 3. g3 d5
4. Nf3 Bb4+ 5. Bd2 Bd6 6. Bg2 {E01: Catalan: Early deviations.} c6 7. Nc3 O-O
8. Bg5 {White has an edge.} h6 9. Bxf6 Qxf6 10. Qb3 Nd7 11. O-O {[%cal Rc4d5]}
Qe7 {[#]} 12. c5 $146 ({Predecessor:} 12. Rfd1 Rb8 13. e4 dxc4 14. Qxc4 e5 15.
d5 Nb6 16. Qb3 Bg4 17. h3 Bh5 18. g4 {1/2-1/2 (56) Istratescu,A (2550)
-Bluebaum,M (2646) Playchess.com INT 2020}) 12... Bc7 13. e4 b6 14. exd5 exd5
15. Rfe1 Qf6 {[#]} (15... Qd8 $1 $11 {remains equal.}) 16. Nxd5 $1 $16 cxd5 17.
Qxd5 Rb8 18. c6 Rd8 {...Nf8 is the strong threat.} 19. cxd7 Bxd7 20. Ne5 (20.
Rac1 {seems wilder.} Bd6 21. a3 Be6 22. Qe4 Rbc8 23. Ne5) 20... Be6 21. Qe4
Bxe5 22. dxe5 Qe7 23. Qe3 Rbc8 24. Be4 Qc5 25. Qxc5 Rxc5 26. f4 g6 27. Kf2 a5
28. Ke3 a4 $1 29. Rec1 Rb5 $1 30. Rc2 Rb4 {[#] White must now prevent ...
Rxe4+!The position is equal.} 31. Bd3 h5 32. Rd2 b5 $1 33. a3 Rb3 34. Rc1 b4 $1
{[%cal Rb4a3]} 35. axb4 a3 36. bxa3 {Threatens to win with Rc6.} Bf5 37. Rcd1
Rxa3 38. b5 Bg4 39. Rc1 Bf5 40. Rcd1 Bg4 41. Rc1 Bf5 42. Rcd1 {Weighted Error
Value: White=0.04/Black=0.05} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.27"]
[Round "10.2"]
[White "Vachier-Lagrave, Maxime"]
[Black "Donchenko, Alexander"]
[Result "1-0"]
[ECO "B12"]
[WhiteElo "2784"]
[BlackElo "2668"]
[Annotator "TA"]
[PlyCount "129"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,129,0,0,0,0,0,0,0,7,-28,-6,-26,-15,-35,-30,-61,-41,-49,-58,-132,-137,
-152,-129,-182,-178,-194,-183,-184,-180,-184,-174,-188,-165,-148,-144,-155,-29,
-26,-21,-28,-17,-18,-11,-21,-21,-12,-27,-9,-9,-9,-9,-9,-9,-14,-10,-24,0,-22,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,35,35,35,35,
35,20,23,16,22,0,3,0,22,8,300,300,300,300,300,300,292,277,29968,29970,29969,
29972,29973,29972,29985,29986]} 1. e4 c6 2. d4 d5 3. f3 e6 4. Nc3 Bb4 5. Bd2
Ne7 6. Bd3 {B12: Caro-Kann: Advance Variation.} b6 7. a3 Bxc3 8. Bxc3 {The
position is equal.} O-O {[#]} 9. f4 $146 ({Predecessor:} 9. Ne2 c5 10. b3 Nbc6
11. O-O dxe4 12. Bxe4 Ba6 13. Bd3 Bxd3 14. Qxd3 cxd4 15. Nxd4 {1/2-1/2 (98)
Denisov,I (2354)-Svetushkin,D (2598) Moscow 2012}) 9... c5 10. dxc5 bxc5 {
[%cal Bb6c5,Bc5c4,Bc4d3,Bd3d2][%mdl 32]} 11. Qh5 Ba6 12. Nf3 d4 13. Bd2 ({
Don't blunder} 13. Ng5 $2 h6 $19) 13... c4 14. Ba5 Qc8 $17 15. Be2 Nbc6 16. Qc5
(16. Bd2 $17) 16... d3 17. cxd3 cxd3 18. Bd1 Nxa5 19. Qxa5 Rb8 20. b3 Rd8 {
White must now prevent ...d2+.} 21. O-O d2 22. Rf2 Rb5 (22... Nc6 $1 $17 {
[%cal Rc6a5]} 23. Qh5 h6 24. Nxd2 Nd4) 23. Qa4 $11 Ng6 ({Of course not} 23...
Qc3 $6 24. Ra2 $16) 24. g3 Rc5 ({Don't play} 24... Qc3 $6 25. Ra2 $14) 25. Rxd2
Rxd2 26. Nxd2 Rc1 27. Rxc1 Qxc1 {[%mdl 64] Double Attack} 28. Qxa6 {Hoping for
Qe2.} Qxd1+ 29. Nf1 Qd4+ {[%mdl 64] Double Attack} 30. Kg2 Qxe4+ 31. Kf2 Qd4+
32. Ke2 h5 33. Qc8+ Kh7 (33... Nf8 {is interesting.} 34. Qc2 e5 35. f5 Qg4+ 36.
Ke3 Qg5+) 34. Qc2 Qd5 35. Kf2 Kg8 (35... e5 {seems wilder.} 36. f5 Qd4+ 37. Ke2
Ne7 38. f6+ Ng6) 36. Qc8+ Nf8 37. Qc4 Qd6 38. b4 Nd7 39. Ke2 Nf6 40. Ne3 Qd8
41. b5 Qf8 42. Qc3 Qd8 43. a4 Nd5 44. Qd4 Qe7 $1 45. Nxd5 exd5+ {[%mdl 4096]
Endgame KQ-KQ} 46. Kf2 Qa3 47. Qxd5 (47. Qxa7 {keeps more tension.} Qb2+ 48.
Kf3 Qb3+ 49. Qe3 Qxa4 50. Qd3) 47... Qxa4 48. Qxh5 Qd4+ 49. Kf1 Qa1+ 50. Kg2 a6
51. bxa6 {Qb5 is the strong threat.} Qa2+ 52. Kh3 {Strongly threatening Qb5.}
Qe6+ 53. Qg4 {White threatens Qxe6 and mate.} Qxa6 54. Qf3 Qe6+ 55. g4 (55. f5
{is more complex.} Qh6+ 56. Kg2 Qd2+ 57. Kg1 Qd4+ 58. Kh1) 55... f5 56. g5 (56.
gxf5 {with more complications.} Qxf5+ 57. Kg2 Qg6+ 58. Kf2 Qc2+ 59. Qe2) 56...
Qe1 (56... Kf7 {feels hotter.} 57. Kg2 Qe1 58. Qb7+ Kg6 59. Qb6+ Kh5) 57. g6 {
Qa8+ would kill now.} (57. Qd5+ {keeps more tension.} Kh8 58. Qd3 Qg1 59. Qe2
Kh7 60. Kh4) 57... Qe8 {[%mdl 8192]} (57... Kf8 $11) 58. Qd5+ $18 {[%mdl 64]
Double Attack} Kh8 59. Qxf5 {And now Qh5+ would win.} Qe3+ 60. Kh4 $1 {[%cal
Rf5f8]} Qe1+ {[#]} 61. Kh5 $1 {[%cal Rf5f8]} Qe2+ $2 {[#]} (61... Qd1+ $18 62.
Kh4 Qe1+ 63. Kg5 Qe7+ 64. Kh5 Qd8) 62. Qg4 $1 {White mates.} Qe6 63. f5 Qe5 64.
Qh3 Qf4 65. f6 {[%cal Rh3c8] White used his chance.  Weighted Error Value:
White=0.05/Black=0.22} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.27"]
[Round "10.3"]
[White "Esipenko, Andrey"]
[Black "Anton Guijarro, David"]
[Result "1-0"]
[ECO "C84"]
[WhiteElo "2677"]
[BlackElo "2679"]
[Annotator "TA"]
[PlyCount "111"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 13,111,16,10,4,0,10,16,14,8,8,10,0,0,-8,13,0,10,0,0,10,22,0,-2,0,0,-18,
-8,-16,7,-12,0,-16,-4,-16,-2,-8,0,-21,-11,-76,-72,-69,-67,-77,-19,-77,-44,-42,
-40,-44,-32,-26,0,-17,0,0,0,0,94,75,84,89,131,132,189,196,168,186,198,190,206,
208,251,241,275,287,274,265,269,266,307,301,316,301,362,347,361,348,375,371,
354,320,313,287,319,247,567,537,644,651]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4
Nf6 5. O-O Be7 6. d3 b5 7. Bb3 d6 8. Bd2 {C84: Closed Ruy Lopez: Unusual White
6th moves.} Bg4 9. c3 Bh5 10. Re1 {The position is equal.} Na5 11. Bc2 c5 12.
h3 O-O 13. Bc1 Nc6 14. Nbd2 d5 {[#]} 15. Nf1 $146 ({Predecessor:} 15. Qe2 d4
16. Nf1 Rc8 17. Ng3 Bg6 18. Bd2 Nd7 19. Bb3 Nb6 20. cxd4 Nxd4 21. Nxd4 Qxd4 {
1-0 (34) Huschenbeth,N (2616)-Rafiee,M (2322) Guatemala City 2020}) 15... d4
16. Ng3 Bg6 17. Bd2 Rc8 18. Rc1 Re8 19. Qe2 Bf8 20. Qf1 Qd6 21. Rcd1 Qd7 22.
Nh4 Qd8 23. Ngf5 Nd7 24. Qe2 Qf6 25. Rc1 Nb6 26. c4 (26. Qg4 $11) 26... bxc4
27. dxc4 Rb8 28. g3 Nb4 (28... a5 $17) 29. Bb1 (29. Bxb4 $11 cxb4 30. c5 Bxf5
31. Nxf5 Bxc5 32. Bb3) 29... Nc8 30. Nxg6 hxg6 31. Nh4 Qe6 32. Kg2 Nd6 33. Nf3
Be7 34. a3 {[%cal Ba2a3,Ba3b4][%mdl 32]} Nc6 35. b4 cxb4 (35... Nb7 $11 36. b5
Nca5) 36. c5 $16 {White now steadily converts the win.} Nb5 {[#] And now ...b3
would win.} 37. axb4 Bf6 38. Bd3 Nc3 (38... Qd7 $16) 39. Bxc3 $18 dxc3 40. Bc4
$36 {[%mdl 2048] White has strong initiative.} Qe7 41. Rxc3 Rxb4 42. Bd5 ({
Resist} 42. Bxa6 Qc7) 42... Nd4 43. Qxa6 Qc7 44. Nxd4 exd4 45. Rc2 g5 46. Qd3
Be5 47. Ra1 Qe7 48. Ra6 Rf8 49. c6 Rbb8 50. Rca2 Rbc8 51. Ra7 Rc7 52. Rb7 g6
53. Qd2 Rfc8 54. Rxc7 Rxc7 {[#]} (54... Bxc7 55. Qxd4 Be5) 55. h4 gxh4 56. Qh6
$1 {[%csl LRg6,LRh4] Weighted Error Value: White=0.11/Black=0.29} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.27"]
[Round "10.4"]
[White "Grandelius, Nils"]
[Black "Firouzja, Alireza"]
[Result "1/2-1/2"]
[ECO "B67"]
[WhiteElo "2663"]
[BlackElo "2749"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 20,90,77,54,49,56,65,55,71,43,55,0,52,67,65,44,76,31,46,19,16,16,16,16,
16,16,18,16,28,15,16,16,16,17,14,0,0,0,16,0,0,0,10,17,22,11,11,11,49,54,68,68,
96,68,98,26,26,22,23,25,57,26,34,27,64,31,79,37,45,36,37,37,38]} 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
b5 10. Bxf6 gxf6 11. f5 h5 {[#] aiming for ...Bh6. B67: Sicilian:
Richter-Rauzer: 7...a6 8 0-0-0 Bd7, lines without 9 f4 Be7.} 12. Kb1 Qb6 13.
fxe6 fxe6 14. Nxc6 Bxc6 15. Ne2 {[#]} (15. Bd3 $14) 15... Kf7 $146 (15... Bxe4
$11 16. Nf4 Bh6) ({Predecessor:} 15... Bxe4 16. Nf4 Bh6 17. Qe1 Qc6 18. Bd3 d5
19. Bxe4 dxe4 20. Nxh5 Bg5 21. g4 Rc8 {1-0 (38) Kotenko,P (2396)-Nelyubin,G 
(2067) Izhevsk 2010}) 16. Nf4 $14 Qc5 17. Be2 Rc8 18. Rhf1 Bh6 19. Qxd6 (19.
Qd3 {seems wilder.} Bxf4 20. Rxf4 Ke7 21. Rdf1 Rhf8 22. Rh4) 19... Qxd6 20.
Rxd6 Bxf4 21. Rxf4 Ke7 22. Rd2 Rcg8 23. Bd3 h4 24. Kc1 e5 25. Rff2 Rg4 26. Rde2
Rd8 27. Re3 Rdg8 28. Ree2 Rd8 29. Re3 Rdg8 30. Ree2 a5 31. Kd2 Rb8 32. Ke3 b4 {
[%cal Bb5b4,Bb4b3][%mdl 32]} 33. Rf5 Be8 34. Rf1 Bf7 35. Ref2 Rb6 36. Ra1 Bg6 {
[#]} 37. a3 ({White should try} 37. b3 $1 $16) 37... b3 $1 $11 38. c3 Rd6 39.
Re1 Bh7 40. Ree2 Bg6 41. Rd2 Rc6 42. Rd1 Rc8 43. Rfd2 (43. Rdf1 $5 {[%cal
Rf2f6]}) 43... Rg8 {White is slightly better.} 44. Rf1 Rd8 45. Rff2 Rc8 {
Weighted Error Value: White=0.13/Black=0.11} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.27"]
[Round "10.5"]
[White "Giri, Anish"]
[Black "Wojtaszek, Radoslaw"]
[Result "1-0"]
[ECO "D02"]
[WhiteElo "2764"]
[BlackElo "2705"]
[Annotator "TA"]
[PlyCount "97"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,97,30,21,23,21,15,28,0,2,0,0,0,4,0,0,0,0,0,0,0,0,0,8,0,33,2,24,11,22,
1,2,6,47,36,49,37,43,33,32,41,40,33,41,50,74,31,23,25,60,65,61,27,28,27,57,27,
20,15,28,12,26,15,18,0,26,26,26,26,33,27,27,27,62,54,62,56,66,67,108,109,90,87,
126,111,122,111,658,621]} 1. d4 Nf6 2. Bf4 d5 3. e3 c5 4. Nf3 Nc6 5. Nbd2 Bg4
6. c3 e6 7. Qb3 {7.Qb3 is better than 7.Qa4. D02: 1 d4 d5 2 Nf3 sidelines,
including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} Qc8 8. h3 Bh5 9. Be2 $5 {[%mdl 4]
White has an edge. Exploring less charted territory.} Be7 10. O-O O-O {[#]} 11.
Qd1 $146 ({Predecessor:} 11. Rfe1 c4 12. Qd1 b5 13. g4 Bg6 14. Nh4 Qd8 15. Nxg6
hxg6 16. Bf3 Nd7 17. e4 {1/2-1/2 (55) Johnson,L (2323)-Bartholomew,J (2539)
Minneapolis 2014}) 11... Nd7 12. Re1 Qd8 13. dxc5 Nxc5 14. b4 Nd7 15. a3 Nb6
16. Rc1 f6 17. e4 e5 18. Be3 Bf7 19. Bxb6 axb6 20. exd5 $1 Bxd5 21. a4 f5 22.
b5 e4 23. bxc6 exf3 24. Bxf3 bxc6 25. Bxd5+ cxd5 26. Nf3 Bf6 27. Re6 Kh8 28.
Qb3 Qd7 29. Rxb6 Rxa4 30. Rd1 Raa8 31. Rxd5 Qc7 {Threatens to win with ...Ra1+.
} 32. g3 Qxc3 {aiming for ...Ra1+.} 33. Qxc3 (33. Rxf5 {feels hotter.} Qc1+ 34.
Kg2 Ra1 35. g4 Qh1+ 36. Kg3) 33... Bxc3 34. h4 Kg8 35. Rb7 Rad8 36. Rc5 Rc8 37.
Rd5 (37. Rcb5 {is interesting.} h5 38. Kg2 g6 39. R5b6 Rf6 40. Ng5) 37... Rcd8
38. Rdb5 Rd6 39. Rc7 Ba1 40. Kg2 Ra6 41. h5 Ra2 42. Rd5 Ra6 43. Nh4 g6 44. h6
f4 {[#]} 45. g4 $1 f3+ 46. Kg3 Rb6 47. Rcd7 ({Wrong is} 47. Nxf3 $2 Rb3 $19)
47... Rb3 48. g5 {Rxh7! is the strong threat.} Bb2 $2 {[%mdl 8192] [#]} (48...
Rf7 $16) 49. Rxh7 $3 {[%mdl 576] Clearance.  Weighted Error Value: White=0.05/
Black=0.26} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.27"]
[Round "10.6"]
[White "Duda, Jan-Krzysztof"]
[Black "Van Foreest, Jorden"]
[Result "1/2-1/2"]
[ECO "E61"]
[WhiteElo "2743"]
[BlackElo "2671"]
[Annotator "TA"]
[PlyCount "52"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 10,52,34,20,38,32,27,7,48,40,32,18,25,10,20,31,34,-25,-24,-11,-28,-132,
-127,-112,0,-63,0,0,0,0,0,0,29,34,29,0,0,0,0,0,0,0,0,-8,0]} 1. d4 Nf6 2. c4 g6
3. Nf3 Bg7 4. e3 O-O 5. Be2 d6 6. Nc3 e5 {E61: King's Indian: Early deviations
for White, including Smyslov System.} 7. dxe5 dxe5 8. Nxe5 Qe7 9. Nf3 {[#]} Rd8
$146 ({Predecessor:} 9... c6 10. O-O Be6 11. Qc2 Nbd7 12. Nd4 Bg4 13. Bxg4 Nxg4
14. Qe4 Qg5 15. Nf3 Qh5 {1-0 (71) Dalalio,G (1800)-Born,A (1470) Dois Irmaos
2012}) 10. Qb3 a5 11. O-O a4 12. Nxa4 Ne4 $1 13. Nd4 ({Better is} 13. Rd1 $14)
13... Nc6 $1 $11 14. Nxc6 bxc6 15. Bf3 (15. Qc2 $11) 15... Bf5 $1 $17 {[%mdl
1024] Black has strong compensation.} 16. c5 {[#]} h5 (16... Rab8 $1 $17 {
[%cal Rb8b3]} 17. Qc4 Nxf2 18. Rxf2 Bd3) 17. Qb4 ({White should try} 17. Bxe4
$11 Rab8 18. Qa3 Qxe4 19. Nc3) 17... Qe6 (17... h4 $15) 18. Bd1 $11 Be5 19. f3
Qe7 $1 {[%cal Re7h4] Hoping for ...Qh4.} 20. Qe1 ({Don't go for} 20. fxe4 $2 {
[#]} Qh4 $1 $19) 20... Nxc5 (20... Ng3 $5 21. hxg3 Bd3 $18) 21. Nxc5 Qxc5 22.
a4 (22. f4 $5 {[%cal Rf4e5]} Bf6 23. a4 $11) 22... Rab8 {The position is equal.
} 23. Qf2 Qa5 {Strongly threatening ...Bxb2!} 24. Ra3 Qc5 25. Ra1 Qa5 {And now
...Bxb2! would win.} 26. Ra3 Qc5 {Weighted Error Value: White=0.20/Black=0.11}
1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.27"]
[Round "10.7"]
[White "Harikrishna, Pentala"]
[Black "Tari, Aryan"]
[Result "1/2-1/2"]
[ECO "C78"]
[WhiteElo "2732"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "103"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,103,42,41,37,3,14,0,-2,-16,-11,-13,-12,-15,0,4,16,0,0,-9,-11,-56,-47,
-75,-28,-12,0,-12,-21,-33,-23,-21,-19,-33,-16,-27,-13,-13,-3,-13,0,-15,-6,-5,
-5,-14,-8,-7,-5,-31,-33,-38,0,0,0,0,0,0,21,0,0,0,0,0,0,0,0,0,0,0,-8,-10,-10,-9,
-9,-44,-44,-44,0,-44,-22,-20,-6,-28,-28,-100,-39,-37,0,-35,0,0,0,-37]} 1. e4 e5
2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O Bc5 6. c3 b5 7. Bc2 d5 {C78: Ruy Lopez:
Archangelsk and Möller Defences.} 8. d3 O-O 9. Bg5 dxe4 10. dxe4 h6 {[#]} 11.
Bh4 $146 ({Predecessor:} 11. Qxd8 Rxd8 12. Bxf6 gxf6 13. Nbd2 Rb8 14. Rfc1 a5
15. Nf1 a4 16. Ng3 Be6 17. Nh5 {1/2-1/2 (43) Hietanen,P (2027)-Tudor,V (2162)
ICCF email 2013}) 11... Qxd1 12. Rxd1 g5 13. Bg3 Bg4 14. Nbd2 Nh5 15. b4 Bb6
16. Bd3 Rad8 17. Be2 Nxg3 18. hxg3 Rd6 (18... Be6 {feels hotter.} 19. a4 bxa4
20. Bxa6 g4 21. Nh2 Ne7) 19. Nf1 (19. a4 {seems wilder.} Rfd8 20. axb5 axb5 21.
Kf1 f6 22. Rdc1) 19... Rxd1 20. Rxd1 Be6 21. Ra1 g4 22. N3d2 Ne7 23. c4 Bd4 24.
Rc1 c6 25. Nb3 Rb8 26. Nfd2 bxc4 27. Bxc4 Rxb4 28. Bxe6 fxe6 29. Kf1 Kf7 30.
Ke2 Ra4 31. Rc2 Kf6 32. Nc4 Rb4 33. f4 gxf3+ 34. gxf3 Ba7 35. Kd3 Rb8 36. Rh2
Rh8 37. Rh5 Bf2 38. g4 Ng6 {[#] ...Nf4+ is the strong threat.} 39. Kc2 Bd4 40.
Nba5 c5 41. a3 Kg7 42. Nc6 Rf8 43. Rh3 Rc8 44. N6a5 Rf8 45. Nb3 Nf4 46. Rh2 Kg6
47. Nbd2 Rb8 48. Nf1 (48. Nb3 $11 {remains equal.}) 48... Kg5 (48... a5 $17)
49. Nfd2 $1 $15 Kg6 50. Nb3 Rf8 51. Nba5 Kg7 52. Nb3 {Weighted Error Value:
White=0.13/Black=0.09} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.29"]
[Round "11.1"]
[White "Carlsen, Magnus"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2862"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "83"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 11,83,0,0,0,0,0,12,0,0,0,9,13,23,0,0,0,0,46,30,23,22,0,42,31,72,19,29,8,
8,0,2,14,16,18,11,0,0,0,0,0,0,-13,-13,-16,-13,-13,-13,-13,-14,-49,-13,-15,0,0,
0,0,0,0,0,-8,0,-14,0,-6,0,-6,-6,-6,0,-7,0,-7,0,-7]} 1. e4 e5 2. Nf3 Nc6 3. Bc4
Bc5 4. c3 Nf6 5. d3 O-O 6. b4 Be7 7. Nbd2 {C54: Giuoco Piano: 4 c3 Nf6, main
lines with 5 d4 and 5 d3.} d5 8. Bb3 Bg4 9. Qc2 {[#]} dxe4 $146 ({Predecessor:
} 9... Bxb4 10. cxb4 Nxb4 11. Qb1 dxe4 12. dxe4 Nd3+ 13. Kf1 Nh5 14. h3 Be6 15.
Nc4 f6 {1-0 (35) Gulbas,C (2393)-Zor,A (2167) Kemer 2018}) 10. dxe4 Bd6 11. h3
Bh5 12. Rb1 a5 13. a3 axb4 14. axb4 b5 15. O-O Ne7 16. Re1 Qc8 17. Qd3 Rb8 18.
Nh4 (18. Nf1 $16) 18... Ng6 $11 19. Nxg6 (19. Ndf3 {is interesting.} Bxf3 20.
Nxf3 Be7 21. Bb2 Rd8 22. Qe2) 19... Bxg6 20. Nf1 Rd8 21. Qf3 c5 22. Bg5 Be7 23.
Ng3 c4 24. Bc2 h6 $36 {[%mdl 2048] Black has good play.} 25. Be3 Qc6 26. Nf5
Bxf5 27. Qxf5 g6 28. Qf3 Kg7 29. Ra1 Ra8 30. Qe2 Rxa1 (30... Nh7 {with more
complications.} 31. Rec1 Bg5 32. Rf1 Bxe3 33. Qxe3 Nf6) 31. Rxa1 {The position
is equal.} Ra8 32. Rxa8 Qxa8 33. Qd2 h5 34. Kh2 Qc6 ({Don't play} 34... Nxe4
35. Qd7 $16) 35. Qe2 Qe6 36. g3 Bd8 37. Kg2 Bb6 38. Bg5 Nh7 39. Bc1 Nf6 40. Bg5
Nh7 41. Bc1 Nf6 42. Bg5 {Weighted Error Value: White=0.09/Black=0.06} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.29"]
[Round "11.2"]
[White "Donchenko, Alexander"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "D35"]
[WhiteElo "2668"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "67"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,67,19,16,27,13,23,31,36,35,26,33,26,29,37,27,43,39,34,27,46,16,43,43,
46,39,25,21,19,8,20,0,24,0,10,18,30,0,0,0,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
} 1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 c5 7. Rb1 cxd4 {
D35: Queen's Gambit Declined: Exchange Variation.} 8. cxd4 Nc6 {The main line
8...Nc6 scores better than 8...Be7.} 9. Bb5 a6 {White is slightly better.} 10.
Bxc6+ bxc6 11. Nf3 c5 12. O-O Be7 13. Qc2 cxd4 14. Rd1 O-O 15. Rxd4 Qe8 16. e5
{[#] And now Ng5 would win.} f5 $146 ({Predecessor:} 16... f6 17. Bf4 Qg6 18.
Qd1 Ra7 19. Rc1 f5 20. Be3 Bb7 21. Rd2 Raa8 22. Rc7 f4 {1/2-1/2 (46)
Nepomniachtchi,I (2717)-Bacrot,E (2714) Biel 2013}) 17. Bg5 Rf7 18. Rb6 h6 $1
19. Bxe7 Rxe7 20. Rdb4 Qf7 $1 21. Qb1 Raa7 {[%cal Ba8a7,Ba7c7,Bc7c5][%mdl 32]}
22. Nd4 {Hoping for Nc6.} Rac7 23. h3 Rc5 24. Qb3 Rec7 {The position is equal.}
25. Rxe6 Kh7 26. Rb8 {[#] Rxc8! is the strong threat.} Rc3 27. Qb6 Bxe6 28.
Nxe6 R3c6 29. Qxc6 Rxc6 30. Nf8+ Kh8 31. Ng6+ $1 {[%mdl 64] [#] Discovered
Attack (Double check)} Kh7 32. Nf8+ Kh8 33. Ng6+ $1 {[%mdl 64] Discovered
Attack (Double check)} Kh7 34. Nf8+ {Weighted Error Value: White=0.04/Black=0.
04} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.29"]
[Round "11.3"]
[White "Tari, Aryan"]
[Black "Esipenko, Andrey"]
[Result "1-0"]
[ECO "C79"]
[WhiteElo "2625"]
[BlackElo "2677"]
[Annotator "TA"]
[PlyCount "65"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,65,33,43,26,27,0,33,1,33,9,16,10,63,63,43,26,69,71,75,72,93,50,51,29,
62,34,45,44,48,50,141,24,50,39,83,78,185,190,259,251,275,255,258,266,477,497,
487,487,714,744,743,740]} 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. O-O Nf6 6.
Re1 Bd7 7. c3 g6 8. d4 Bg7 9. Nbd2 {[%cal Bb1d2,Bd2f1,Bf1e3,Be3d5][%mdl 32] 9.
h3 is more fashionable. C79: Ruy Lopez: Steinitz-type lines with 3...a6 4 Ba4
Nf6 5 0-0 d6.} O-O 10. Bc2 $5 {[%mdl 4] Leaves trodden paths.} Nh5 {[%cal
Re5d4] [#]} 11. dxe5 $146 {White is slightly better.} ({Predecessor:} 11. Nf1
Bg4 12. d5 Ne7 13. h3 Bxf3 14. Qxf3 f5 15. Qd1 f4 16. Nh2 Nf6 17. c4 {1-0 (62)
Makropoulou,M (2201)-Ozturk,K (2239) Mardin 2011}) 11... dxe5 12. Nf1 Nf4 13.
Ne3 Kh8 (13... Be6 $11) 14. Nd5 $14 Ne6 15. h4 h5 16. Be3 f6 17. b4 Ne7 18. Qe2
Nc8 19. c4 Qe8 20. c5 a5 21. a3 Na7 22. Bb3 Nb5 {[#]} (22... Kh7 $14) 23. Bc4 (
23. a4 $1 $16 {[%cal Ra4b5]} Nbd4 24. Bxd4 exd4 25. Qc4) 23... axb4 $11 24.
axb4 {aiming for Rxa8.} Rxa1 25. Rxa1 f5 (25... c6 $16) 26. exf5 $18 gxf5 (
26... Rxf5 $142 27. Ng5 e4) 27. Ng5 Nxg5 28. hxg5 {And now Ra8! would win.} ({
Don't do} 28. Bxg5 $6 Nd4 $18) 28... f4 {[#]} 29. Ra8 $3 {[%mdl 512]} Qg6 (
29... f3 {was necessary.} 30. Rxe8 fxe2 31. Rxf8+ Bxf8 32. Bxe2 h4) 30. Rxf8+ {
White is clearly winning.} ({Stronger than} 30. Bxb5 Rxa8 31. Bxd7 Ra1+ 32. Kh2
fxe3 $17) 30... Bxf8 31. Bd2 ({Less strong is} 31. Bxb5 Bxb5 32. Qxb5 fxe3 $18)
31... Na3 (31... Qxg5 $142 32. Bxb5 c6) 32. Bd3 Qxg5 33. Qe4 {[%csl Gd3][%cal
Re4h7] Weighted Error Value: White=0.20/Black=0.31} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.29"]
[Round "11.4"]
[White "Van Foreest, Jorden"]
[Black "Harikrishna, Pentala"]
[Result "1-0"]
[ECO "C54"]
[WhiteElo "2671"]
[BlackElo "2732"]
[Annotator "TA"]
[PlyCount "119"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,119,33,16,22,7,25,13,22,15,40,34,93,104,102,79,129,125,128,129,179,
165,174,164,184,179,186,180,168,142,147,125,155,111,148,155,169,174,178,183,
190,185,305,312,359,380,365,372,347,368,447,435,431,315,356,379,385,329,373,
367,372,373,350,332,703,683,655,246,227,232,232,221,268,250,278,260,282,270,
376,86,377,369,368,366,366,353,331,338,370,329,353,329,476,464,858,750,12835,
10774,12842,12843,12843,12843,12845,12845,12847,12847,12847,12843,12844,336]} 
1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O h6 7. Re1 O-O {
C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 8. Nbd2 a6 9. a4
Ng4 {The position is equal.} 10. Re2 Kh8 11. h3 f5 {[#]} 12. d4 $146 ({Of
course not} 12. hxg4 fxg4 13. Nh2 g3 $11) ({Predecessor:} 12. Qe1 Nf6 13. Nh4
Kh7 14. Nxf5 Bxf5 15. exf5 d5 16. Bb3 Qd7 17. g4 Rae8 18. Bc2 {1-0 (40)
Schoppen,C (2508)-Vestby Ellingsen,M (2363) Hoogeveen 2019}) 12... exd4 {
...Nxf2! is the strong threat.} 13. hxg4 d3 14. Bxd3 fxg4 15. Nd4 Nxd4 16. cxd4
Bxd4 17. Nf1 Qf6 {[%cal Rd4f2]} 18. Qc2 $1 c5 19. Be3 Be5 20. Bc4 Bd7 21. Bd5
Rab8 22. Ng3 b5 23. axb5 Rxb5 24. Qd1 a5 25. Ra2 Rfb8 26. Rd2 Qh4 (26... Be6
$142 27. Nh5 Qf7) 27. b3 $18 R5b6 {and the idea ...a4 leaves Black hopeful.}
28. Rxa5 Bc6 29. Bxc6 Rxc6 30. Nf1 Rcb6 31. g3 Qh3 32. Bxc5 dxc5 33. Rd8+ (33.
Rxc5 Bf6 $18) 33... Kh7 34. Rxb8 Rxb8 35. Rxc5 Re8 36. Qd7 Qh5 37. Ne3 Ra8 $2 (
37... Qg6 38. Nxg4 Bd6) 38. Qb5 Re8 39. Qa5 $2 (39. b4) 39... Qg5 {[#]} 40. Rd5
$1 Qe7 41. Nxg4 Bb2 42. f3 Rc8 43. Qd2 Qa3 44. Rd7 Qxb3 {White must now
prevent ...Rc1+.} 45. Qxh6+ $40 {[%mdl 128] White is out for blood.} Kg8 {
[#] This move loses the game for Black.} 46. Qh5 Qe6 47. Qd5 Qxd5 48. Rxd5 {
[%mdl 4096] Endgame KRB-KRN} ({Not} 48. exd5 Kf8 $18) 48... Rc2 49. Kf1 Bc1 50.
Rd7 Kf8 51. e5 Bb2 (51... Rc3 {keeps fighting.} 52. Kf2 Rc2+ 53. Ke1 Rc3) 52.
f4 {White is clearly winning.} g5 (52... Rc3 $142 53. Kg2 Ba3) 53. Ne3 Rc5 54.
e6 gxf4 55. gxf4 Rc1+ 56. Ke2 Ba3 57. Nf5 {[%cal Rd7d8]} Rc8 58. Rf7+ Kg8 59.
Kf3 Re8 60. Nh6+ {Weighted Error Value: White=0.15/Black=0.27} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.29"]
[Round "11.5"]
[White "Firouzja, Alireza"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2749"]
[BlackElo "2823"]
[Annotator "TA"]
[PlyCount "122"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,122,29,17,23,18,24,19,22,-10,0,-9,0,0,11,-18,0,0,-6,-18,-19,-19,9,
-16,-14,-31,0,-119,0,-43,17,0,8,0,0,0,2,0,0,0,0,0,14,-13,-10,-29,-8,-66,-70,
-64,-58,-158,53,52,39,44,113,100,112,109,141,114,113,107,98,102,100,95,100,103,
98,93,110,106,102,77,88,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O h6
7. Re1 O-O {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 8.
Nbd2 Bb6 9. a4 a5 {[#]} 10. Bb5 $146 ({Predecessor:} 10. Nf1 Ne7 11. Ng3 Ng6
12. h3 c6 13. Bb3 d5 14. exd5 Nxd5 15. Nh5 Re8 16. Qd2 {1-0 (24) Chigaev,M 
(2588)-Nakamura,H (2736) chess.com INT 2020}) 10... Ng4 11. Re2 Ne7 12. d4 Ng6
13. Nf1 d5 14. exd5 {[%cal Rd4e5]} exd4 $1 15. h3 Nf6 16. Nxd4 Nxd5 17. Re1
Ndf4 18. Be3 c6 19. Bc4 {[#]} (19. Be2 $11) 19... Bc7 (19... Nxg2 $1 $17 {
[%mdl 512]} 20. Kxg2 Qh4) 20. Ng3 {[#]} Nd5 (20... Nxg2 $1 $15 21. Kxg2 Qh4)
21. Bd2 Qd6 22. Bb3 Bd7 23. Nf3 Rfe8 24. Qc2 Ngf4 25. Rad1 Rxe1+ 26. Rxe1 Qf6 {
White must now prevent ...Nxh3+!} 27. Nd4 Rd8 28. Re4 Qg6 29. Bxd5 (29. Bxf4
$11 Nxf4 30. Re7 Qxc2 31. Nxc2) 29... Nxd5 $15 30. Ngf5 $1 {Strongly
threatening c4.} Qf6 {...c5 is the strong threat.} 31. Rg4 {[#]} (31. g4 $15)
31... g6 $2 (31... Kh8 $1 $17 32. Rh4 (32. Rxg7 $2 c5 $19) 32... Bxf5 33. Nxf5
Ne7 34. Nxh6 Qxh4 35. Nxf7+ Kg8 36. Nxd8 Bxd8 37. Qb3+ Kf8) 32. Nxh6+ $14 Kf8
33. Re4 $36 {[%mdl 2048] Black is under pressure.} Nf4 (33... g5 $14 34. Ng4
Qg6) 34. Ng4 $16 Bxg4 35. hxg4 Kg7 36. Bxf4 Bxf4 {[#]} 37. Nf5+ $1 {[%mdl 512]}
gxf5 38. Rxf4 {[%mdl 4096] Endgame KQR-KQR} Qg5 39. Rxf5 (39. Qxf5 $2 {gets
mated.} Rd1+ 40. Kh2 Qh4#) 39... Qxg4 {And now ...Rd1+ would win.} 40. Rf3 {
aiming for Rg3.} Qh5 41. c4 Rd4 42. Qc3 Qe5 {( -> ...Rd1+)} 43. Rd3 c5 44. Rg3+
({White should try} 44. Kf1 $16) 44... Kf8 $11 {The position is equal.} 45.
Qxa5 Rd1+ {[%mdl 64] Discovered Attack} 46. Kh2 Qh5+ 47. Rh3 Qe5+ 48. g3 {
Threatens to win with Qa8+.} Qf5 $1 {[%cal Rf5f2]} 49. Qa8+ {[%mdl 64] Double
Attack} Ke7 {[%cal Rf5f2]} 50. Qxb7+ Rd7 51. Qh1 {Hoping for Qe1+.} (51. Qg2 {
feels hotter.} Rd2 52. Kg1 Rd1+ 53. Kh2 Rd2) 51... Qxf2+ {[%mdl 64] Double
Attack} 52. Qg2 Rd2 {[%csl Gd2][%cal Rf2g2]} 53. Qxf2 Rxf2+ {KR-KR} 54. Kg1
Rxb2 55. Rh5 Ra2 56. Rxc5 Rxa4 57. Kg2 Kd6 58. Rd5+ Ke6 59. Rd4 Ke5 60. Rf4 f5
61. Kh3 Ra3 {Weighted Error Value: White=0.16/Black=0.15} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.29"]
[Round "11.6"]
[White "Anton Guijarro, David"]
[Black "Grandelius, Nils"]
[Result "1/2-1/2"]
[ECO "D85"]
[WhiteElo "2679"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,60,17,1,4,4,0,-1,0,-13,0,0,0,0,0,0,0,-7,-12,-11,0,0,0,0,24,6,6,4,4,3,
14,-8,0,-15,-12,-12,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. c4 g6 2. d4 Nf6 3. Nc3 d5 4.
cxd5 Nxd5 5. Bd2 Bg7 6. e4 Nxc3 7. Bxc3 O-O 8. Bc4 Nd7 {D85: Exchange Grünfeld:
Unusual White 7th moves and lines with 7 Nf3.} 9. Qd2 {[#]} Nb6 $146 ({
Predecessor:} 9... c5 10. d5 Ne5 11. Be2 e6 12. f4 exd5 13. Bxe5 Bxe5 14. fxe5
Qh4+ 15. Kf1 dxe4 16. Qe3 {0-1 (50) Kuzmanovic,A (2079)-Maksimovic,M (2173)
Belgrade 2018}) 10. Bb3 c5 {[%cal Rc5d4]} 11. d5 e6 12. Bxg7 Kxg7 13. d6 c4 14.
Bc2 e5 15. f4 exf4 16. Qxf4 Qf6 17. Qxf6+ Kxf6 18. Nf3 Bg4 19. e5+ Kg7 $1 {
The position is equal.} 20. O-O f6 21. exf6+ Rxf6 22. Ne5 Be6 23. Rfd1 Rd8 24.
Be4 Bf5 25. Bxb7 Rfxd6 26. Rxd6 Rxd6 27. Rc1 Rd2 28. Nxc4 Nxc4 29. Rxc4 Rxb2
30. Bd5 Rc2 {A rather calm draw.  Weighted Error Value: White=0.03/Black=0.03}
1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.29"]
[Round "11.7"]
[White "Wojtaszek, Radoslaw"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1/2-1/2"]
[ECO "D82"]
[WhiteElo "2705"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "90"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,90,16,17,27,19,27,18,9,16,7,10,0,5,4,9,19,43,54,114,116,115,112,115,
108,121,116,116,116,122,122,117,87,94,87,87,75,78,61,64,61,78,77,91,91,91,86,
86,86,86,86,86,86,86,86,86,45,47,88,85,42,54,42,42,18,18,18,18,19,19,16,20,14,
14,14,14,14,14]} 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Bf4 Bg7 5. e3 c5 6. dxc5 Qa5
7. Rc1 dxc4 8. Bxc4 O-O 9. Nge2 {D82: Grünfeld: 4 Bf4.} Nc6 10. O-O Qxc5 11.
Nb5 {[#] aiming for Bxf7+!} Be6 12. Bd3 Qb4 13. Nc7 Bxa2 {Strongly threatening
...Rac8.} 14. Nxa8 Rxa8 15. Qc2 $36 {[%mdl 2048] Black is under pressure.} Rd8
16. Nd4 {[#]} Nd5 $146 ({Better is} 16... Nxd4 $14 17. exd4 Nd5) ({Predecessor:
} 16... Nxd4 17. exd4 Qxd4 18. Be3 Qe5 19. h3 Nd5 20. Bd2 Qd6 21. Ra1 Nb6 22.
Rxa2 Qxd3 23. Qxd3 Rxd3 {1-0 (49) Basso,P (2428)-Illingworth,M (2517) Douglas
2015}) 17. Nxc6 $16 bxc6 {[#]} 18. Bc4 $1 {[%cal Rc4a2]} Bxc4 19. Qxc4 Bxb2 20.
Qxb4 Nxb4 21. Rc4 a5 22. Bc7 Rd5 23. g4 h5 24. Rb1 Be5 25. Bxe5 Rxe5 {[%mdl
4096] Endgame KRR-KRN} 26. h3 f6 27. Rd1 hxg4 28. hxg4 Rd5 29. Rxd5 cxd5 {KR-KN
} 30. Rc5 (30. Rc3 {is more complex.} Kf7 31. Kg2 g5 32. Rc5 a4 33. Ra5) 30...
Nd3 31. Rxa5 {g5 is the strong threat.} Ne5 32. Ra4 d4 33. exd4 Nxg4 34. Kg2
Kf7 35. Kf3 f5 36. Ra5 Ke6 37. Kg3 Nf6 38. f3 Ne8 $1 39. Ra8 Nc7 {The position
is equal.} 40. Rg8 Kf7 41. Rc8 Nd5 42. Rd8 e6 43. Kh4 {Hoping for Kg5.} Kf6 44.
Rf8+ Kg7 45. Re8 Kf6 {Weighted Error Value: White=0.06/Black=0.04} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.30"]
[Round "12.1"]
[White "Wojtaszek, Radoslaw"]
[Black "Carlsen, Magnus"]
[Result "1/2-1/2"]
[ECO "D46"]
[WhiteElo "2705"]
[BlackElo "2862"]
[Annotator "TA"]
[PlyCount "69"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 18,69,28,0,18,-7,0,0,31,-5,-7,-6,-10,-15,-13,-7,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. c4 e6 3. Nf3
c6 4. e3 Nf6 5. Nc3 Nbd7 6. Qc2 Bd6 7. Bd3 O-O 8. O-O dxc4 9. Bxc4 Qe7 10. a3
a6 {D46: Semi-Slav: 5 e3 Nbd7 6 Bd3, Black avoids the Meran.} 11. h3 b5 12. Be2
{[#]} Re8 $146 ({Predecessor:} 12... c5 13. dxc5 Bxc5 14. b4 Bd6 15. Ne4 Bb7
16. Nxd6 Qxd6 17. Bb2 Rac8 18. Qb3 Bd5 {0-1 (32) Suvorov,A (2313)-Vasquez
Schroder,R (2441) chess.com INT 2020}) 13. Ng5 (13. e4 $5 {[%cal Re4e5]} e5 14.
Rd1 $11) 13... c5 {The position is equal.} 14. dxc5 Nxc5 15. b4 Ncd7 16. Nce4
Nxe4 17. Nxe4 ({But not} 17. Qxe4 $2 Qxg5 18. f4 Qf6 $19) 17... Be5 18. Bb2
Bxb2 19. Qxb2 Bb7 20. Bd3 Rac8 21. Rfc1 Bxe4 22. Bxe4 Nb6 23. Bd3 g6 24. Rxc8
Rxc8 25. Rc1 Rc7 26. g3 Rxc1+ 27. Qxc1 Qd6 28. Be2 Nc4 29. Bxc4 Qc6 {[%mdl 64]
[#] Pin} 30. Qc3 bxc4 31. Kf1 Qh1+ 32. Ke2 Qb1 33. Qxc4 Qb2+ 34. Kf3 Qxa3 35.
b5 {A rather calm draw.  Weighted Error Value: White=0.04/Black=0.02} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.30"]
[Round "12.2"]
[White "Grandelius, Nils"]
[Black "Tari, Aryan"]
[Result "1/2-1/2"]
[ECO "C54"]
[WhiteElo "2663"]
[BlackElo "2625"]
[Annotator "TA"]
[PlyCount "60"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,60,0,6,0,0,0,2,0,0,0,0,0,0,0,0,0,0,0,0,0,51,0,0,0,35,56,46,53,58,73,
56,78,70,57,66,75,63,0,0,0,0,0,0,0,0]} 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6
5. d4 exd4 6. e5 d5 7. Bb5 Ne4 8. cxd4 Bb6 9. Nc3 O-O 10. Be3 {C54: Giuoco
Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} Bg4 11. h3 Bh5 12. Qc2 Ba5 13.
O-O Bxf3 14. gxf3 Nxd4 15. Bxd4 Qg5+ $1 16. Kh1 Bxc3 17. Bxc3 Qf5 {[#] ...
Ng3+! is the strong threat.} 18. Rfc1 Qxh3+ 19. Kg1 Ng5 {[%cal Rg5f3]} 20. Be2
{[#]} Qh4 $146 {aiming for ...Nh3+.} ({Predecessor:} 20... Nxf3+ 21. Bxf3 Qxf3
22. Qd1 Qe4 23. Bd4 a5 24. Rxc7 Ra6 25. f3 Rg6+ 26. Kf1 Qh4 {1/2-1/2 (59)
Nguyen,T (2548)-Dragnev,V (2521) Radenci 2019}) 21. Bd2 Nh3+ 22. Kg2 Qxf2+ 23.
Kxh3 Qxe2 24. Kg3 Qxe5+ 25. Bf4 Qf6 26. Qxc7 Rae8 27. Qxb7 (27. Re1 $14) 27...
Qg6+ $11 {The position is equal.} 28. Kf2 $1 Qf6 29. Kg3 Qg6+ 30. Kf2 $1 Qf6 {
Weighted Error Value: White=0.04/Black=0.02} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.30"]
[Round "12.3"]
[White "Caruana, Fabiano"]
[Black "Anton Guijarro, David"]
[Result "1/2-1/2"]
[ECO "D39"]
[WhiteElo "2823"]
[BlackElo "2679"]
[Annotator "TA"]
[PlyCount "100"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 15,100,11,14,18,37,12,24,4,41,-11,-3,-6,-7,-22,-20,-18,-10,-7,-8,-29,
-18,-18,-19,-26,0,-22,0,-12,14,14,16,12,15,12,19,19,22,23,27,0,0,0,0,-5,0,0,0,
0,0,-19,-19,-20,-5,-8,-8,-7,0,-49,0,-11,0,-52,-44,-33,-37,-41,-43,-35,-17,-25,
-10,-54,-55,-55,-48,-41,-44,-38,-4,-4,-5,-8,-4,-2,0,-6,0]} 1. d4 Nf6 2. c4 e6
3. Nf3 d5 4. Nc3 dxc4 5. e4 Bb4 6. Bg5 h6 7. Bxf6 Qxf6 8. Bxc4 c5 9. O-O {
D39: Queen's Gambit Declined: Ragozin Defence with 5 Bg5 dxc4.} cxd4 {[#]} 10.
e5 $1 {10.e5 scores better than 10.Nb5.} Qd8 11. Ne4 {White has an edge.} O-O {
[#]} 12. Qc1 $146 ({Better is} 12. Rc1 $14) ({Predecessor:} 12. Qd3 Be7 13.
Rfe1 Nc6 14. Rad1 Qc7 15. Ng3 Nb4 16. Qe2 d3 17. Qe4 b5 18. Bxd3 Nxd3 19. Qxd3
{1/2-1/2 (47) Nepomniachtchi,I (2784)-Ding,L (2791) chess24.com INT 2020})
12... Qc7 13. Nf6+ Kh8 (13... gxf6 $2 14. exf6 Nd7 15. Qxh6 $18) 14. Rd1 Nd7
15. Rxd4 Be7 $1 ({Wrong is} 15... Nxe5 $2 {[#]} 16. Rh4 $1 $18) 16. Qf4 Bc5 17.
Qe4 {[%csl Gf6][%cal Re4h7]} Nxf6 ({But not} 17... gxf6 $6 18. Qh4 $16) 18.
exf6 gxf6 19. Rdd1 f5 20. Qe2 Be7 21. Rac1 Bf6 22. Qd2 Kg7 {[#]} 23. Bxe6 $1
Qb6 24. Bb3 {Qf4 is the strong threat.} Be6 25. Bxe6 Qxe6 26. Nd4 Qe4 {
Strongly threatening ...Rfd8.} 27. Nb5 Rad8 28. Nd6 Qe6 29. Qb4 Rd7 30. Nc4 $1
Bd4 31. Re1 Qf6 32. Qb3 Rc8 33. a4 Rc5 34. Rc2 Qh4 35. g3 Qf6 36. Rce2 f4 37.
Nd2 $1 {[%cal Rd2e4] aiming for Ne4.} Rf5 {Threatens to win with ...fxg3.} ({
Not} 37... Bxb2 $2 38. Ne4 $18) 38. Ne4 (38. Kg2 $11) 38... Qg6 $1 $15 {
And now ...f3 would win.} 39. Qf3 $1 fxg3 40. Qxg3 Bb6 41. Kf1 Kh7 42. Rc1 Rd4
43. Qxg6+ Kxg6 44. b3 Rf3 45. Rc8 Kg7 46. Ng3 $1 Rd8 47. Rxd8 {The position is
equal.} Bxd8 48. b4 Ra3 49. a5 Ra4 50. Re4 b6 {Weighted Error Value: White=0.
08/Black=0.06} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.30"]
[Round "12.4"]
[White "Giri, Anish"]
[Black "Firouzja, Alireza"]
[Result "1/2-1/2"]
[ECO "C11"]
[WhiteElo "2764"]
[BlackElo "2749"]
[Annotator "TA"]
[PlyCount "134"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,134,8,12,17,15,15,14,12,13,20,17,16,23,18,29,27,29,31,33,44,35,47,50,
52,51,60,52,37,12,14,18,20,13,13,13,13,12,8,16,18,15,47,37,114,58,41,33,181,
178,200,189,185,152,205,220,196,88,191,189,191,179,181,171,162,156,265,254,308,
333,303,263,347,337,429,431,399,256,251,257,233,235,246,252,246,236,207,219,
272,266,201,210,371,356,539,464,525,495,564,714,687,544,540,486,710,652,610,0,
0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. e5 Nfd7 5. f4 c5 6.
Nf3 Nc6 7. Be3 a6 8. a3 cxd4 9. Nxd4 Bc5 {C11: French: Classical System: 4 e5
and 4 Bg5 dxe4.} 10. Qd2 O-O 11. Be2 Qc7 12. O-O {[#]} b6 $146 ({Predecessor:} 
12... Nxd4 13. Bxd4 b5 14. Qe3 Bxd4 15. Qxd4 Qa7 16. Qxa7 Rxa7 17. Bd3 g6 18.
Ne2 Nc5 19. g4 b4 20. axb4 Nxd3 {1/2-1/2 (20) Faber,H (2502)-Glatzel,H (2460)
Remote email 2013}) 13. Nxc6 Qxc6 14. b4 Bxe3+ 15. Qxe3 Bb7 {[#]} 16. Bd3 $1 d4
{[%csl Gb7][%cal Rc6g2]} 17. Qe4 Qxe4 18. Nxe4 Bd5 19. Ng5 g6 20. Nf3 Bxf3 21.
Rxf3 b5 22. Be4 Rad8 23. Rd3 Nb6 24. Bb7 $36 {[%mdl 2048] White has good play.}
Na4 $1 25. Bxa6 Nc3 26. Bb7 Ne2+ 27. Kf2 Nxf4 28. Rd2 d3 29. c3 Ne2 (29... Rb8
$14 30. Bf3 g5) 30. Ke3 (30. a4 $16) 30... Nxc3 {Threatening ...Nd5+.} 31. Rxd3
Rxd3+ (31... Rb8 $1 $14) 32. Kxd3 $14 {[%mdl 4096] Endgame KRB-KRN} Na4 33. Rc1
Rd8+ 34. Ke2 Kg7 (34... f6 $16) 35. Bc6 $1 $18 Rb8 36. Rc2 (36. Kd3 $18 {
is more deadly.}) 36... Kf8 (36... g5 $16 {was worth a try.}) 37. Kd2 Ke7 38.
Kc1 f6 39. exf6+ Kxf6 40. Kb1 $1 Ke5 {[#]} (40... e5 $16 {was necessary.} 41.
Ka2 Ke6) 41. Ka2 $1 Kd4 42. Kb3 Kd3 43. Rf2 e5 44. Rf7 Nb6 45. Bxb5+ Kd4 46. a4
Nd5 47. Rxh7 e4 48. Rf7 e3 {[#]} 49. Rf1 $1 Nc3 50. Rf4+ Ke5 51. Rf3 ({
Stronger than} 51. Kxc3 Kxf4 52. Be2 Rc8+ 53. Kb3 Rc1 $11) 51... Nxb5 52. Rxe3+
{KRN-KR} ({And not} 52. axb5 Kd4 $11) 52... Kd4 53. Rg3 Nd6 (53... Nc7 54. Rxg6
Re8) 54. Rxg6 Ne4 (54... Kd5 $142 55. h4 Re8 56. Rg5+ Kd4) 55. a5 {[%cal Ba4a5,
Ba5a6,Ba6a7][%mdl 32]} Kd5 56. a6 Nc5+ 57. Ka3 Nd3 58. a7 Ra8 59. Rg7 Kc6 (
59... Nf4 $142 60. b5 Ne6) 60. h4 Nf4 {and the idea ...Ne6 leaves Black
hopeful.} 61. g4 $2 (61. Ka4 $18) 61... Ne6 $11 {The position is equal.} 62.
Rf7 {aiming for g5.} (62. b5+ {keeps more tension.} Kxb5 63. Re7 Nd8 64. h5 Nc6
65. Rg7) 62... Nc7 63. g5 {Kb3 is the strong threat.} (63. Kb2 {is more
complex.} Rxa7 64. h5 Ra4 65. Kb3 Ra1 66. Rg7) 63... Rxa7+ 64. Kb2 {Strongly
threatening g6.} Ra8 65. g6 Ne6 66. h5 {Hoping for h6.} Rh8 67. Rh7 Rg8 {
Blacks defense is rewarded with a draw.  Weighted Error Value: White=0.11/
Black=0.29} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.30"]
[Round "12.5"]
[White "Esipenko, Andrey"]
[Black "Van Foreest, Jorden"]
[Result "1/2-1/2"]
[ECO "B13"]
[WhiteElo "2677"]
[BlackElo "2671"]
[Annotator "TA"]
[PlyCount "81"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,81,-2,8,8,5,4,12,13,13,11,11,3,0,0,9,0,0,0,0,0,0,-8,6,0,31,18,26,33,
66,0,0,-7,0,-13,-13,-69,-62,-70,-19,-23,0,0,0,0,0,-33,0,0,0,0,0,0,0,0,0,0,0,-8,
0,0,0,-7,0,0,0,0,0,0,0,0,0,0,0,0]} 1. d4 d5 2. Nc3 Nf6 3. Bf4 c5 4. e3 cxd4 5.
exd4 Bg4 6. f3 {B13: Caro-Kann: Exchange Variation and Panov-Botvinnik Attack.}
Bd7 7. Nb5 Bxb5 8. Bxb5+ Nc6 {[%cal Bb8c6,Bc6a5,Ba5c4][%mdl 32]} 9. c3 e6 {[#]}
10. Be3 $146 ({Predecessor:} 10. Ne2 Bd6 11. Bg5 Qb6 12. a4 a6 13. Bd3 Qc7 14.
g3 Nd7 15. O-O h6 16. Be3 {0-1 (64) Miladinovic,I (2536)-Iordachescu,V (2589)
Lichess.org INT 2020}) 10... Bd6 11. f4 Qc7 12. g3 O-O 13. Nf3 Na5 14. Bd3 Nc4
15. Bc1 b5 16. O-O Ne4 17. Qe2 f5 18. b3 Nb6 19. Bd2 ({White should try} 19.
Bb2 $14) 19... a6 $11 20. Rac1 Rac8 {[%cal Ba8c8,Bc8c7,Bc7d7,Bd7d3,Bd3d1][%mdl
32]} 21. Ne5 Qe7 22. g4 (22. Rfe1 $11) 22... Nxd2 23. Qxd2 fxg4 (23... Bxe5 $15
24. fxe5 fxg4) 24. Nxg4 Qh4 25. Ne5 Rc7 26. Qe3 Bxe5 27. dxe5 d4 28. Qxd4 {
The position is equal.} Rd7 29. Qxb6 Qg4+ 30. Kh1 Rxd3 31. Qf2 Rfd8 32. Qg2 Qf5
33. Rc2 Rd1 {[#] Strongly threatening ...Rxf1+.} 34. Rcf2 h5 35. Kg1 h4 36. Qg5
Qh3 37. Qg6 Rxf1+ 38. Rxf1 Rd2 {[%csl Gd2][%cal Rh3h2] [#]} 39. Qe8+ Kh7 {
[%csl Gd2][%cal Rh3h2]} 40. Qh5+ Kg8 {[%csl Gd2][%cal Rh3h2]} 41. Qe8+ {
Weighted Error Value: White=0.08/Black=0.08} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.30"]
[Round "12.6"]
[White "Vachier-Lagrave, Maxime"]
[Black "Duda, Jan-Krzysztof"]
[Result "1/2-1/2"]
[ECO "C42"]
[WhiteElo "2784"]
[BlackElo "2743"]
[Annotator "TA"]
[PlyCount "152"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 17,151,29,22,29,31,22,28,31,31,30,34,28,27,3,21,22,16,0,0,0,0,0,0,0,0,0,
24,16,19,18,35,14,37,0,0,0,0,0,0,0,0,0,0,-72,-2,-161,-133,-153,-81,-80,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,-28000,-28000,-28000,-28000,-28000,-28000,-28000,
-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,
-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,
-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,
-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,
-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,-28000,
-28000,-28000,-28000,-28000,-28000,-28000]} 1. e4 e5 2. Nf3 Nf6 3. Nxe5 d6 4.
Nf3 Nxe4 5. d4 d5 6. Bd3 Bf5 7. O-O Be7 8. Re1 O-O 9. c4 Nc6 10. cxd5 {C42:
Petroff Defence: 3 Nxe5 and unusual White 3rd moves.} Qxd5 11. Nc3 Nxc3 12.
bxc3 {White has an edge.} Rae8 13. Bf4 Bxd3 14. Qxd3 Bd6 15. Ng5 {[%csl Gg5]
[%cal Rd3h7] [#]} g6 $146 {[#]} ({Predecessor:} 15... f5 16. Bxd6 cxd6 17. Nh3
Ne5 18. Qg3 Ng6 19. Nf4 Nxf4 20. Qxf4 Re4 21. Rxe4 fxe4 {1/2-1/2 (38) Shirov,A
(2649)-Kuzubov,Y (2643) chess.com INT 2020}) 16. Ne4 $1 {Threatens to win with
Nf6+.} Re6 17. Nxd6 cxd6 18. Rxe6 fxe6 19. Be3 Ne5 20. Qe2 Qc4 21. Qd1 Nd7 22.
Qb3 Qxb3 23. axb3 $11 {[%mdl 4096] Endgame KRB-KRN} a6 24. c4 Rc8 25. Ra5 Kf7
26. h4 d5 27. cxd5 Rc3 28. b4 Rb3 29. dxe6+ Kxe6 30. d5+ (30. Kf1 $11 {remains
equal.}) 30... Kf7 (30... Ke5 $17) 31. g3 $2 {[#]} (31. Bd2 $11) 31... Rxb4 $19
32. d6 Nb8 (32... Ke6 $142 33. Bf4 Rb5 34. Rxb5 axb5) 33. h5 Rb5 (33... Rb1+
$17 34. Kg2 Rd1) 34. hxg6+ hxg6 35. Rxb5 axb5 $11 {KB-KN} 36. Kf1 Ke6 37. Ke2
Nd7 38. f4 Kxd6 39. g4 Kd5 40. f5 gxf5 41. gxf5 Ke4 42. Kd2 Kxf5 {Black keeps
a firm grip on the game.} (42... b4 {with more complications.} 43. Bg5 Kd4 44.
f6 Ne5 45. Kc2 Kc4) 43. Kc3 {Mate.} Ke4 44. Bg1 Kd5 45. Kb4 Kc6 46. Bf2 Ne5 47.
Bg1 Nd3+ 48. Kc3 Nf4 49. Kb4 Nd5+ 50. Kb3 Nc7 51. Kb4 Na6+ 52. Kb3 Kd6 53. Kc3
Kc6 54. Kb3 Nc5+ 55. Kb4 Nd7 56. Bf2 Nb6 57. Bg1 Nd5+ 58. Kb3 b6 59. Bf2 Kb7
60. Be1 Ka6 61. Bd2 Ne7 62. Bb4 Nc6 63. Bd2 Ne5 64. Kb4 Nd3+ 65. Kc3 Ne5 66.
Kb4 Nc6+ 67. Kb3 b4 68. Bxb4 Nxb4 69. Kxb4 {KP-K} b5 70. Kb3 Ka5 71. Ka3 b4+
72. Kb2 Ka4 73. Ka2 b3+ 74. Kb1 Ka3 75. Ka1 b2+ 76. Kb1 Kb3 {Weighted Error
Value: White=0.13/Black=0.10} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.30"]
[Round "12.7"]
[White "Harikrishna, Pentala"]
[Black "Donchenko, Alexander"]
[Result "1-0"]
[ECO "E20"]
[WhiteElo "2732"]
[BlackElo "2668"]
[Annotator "TA"]
[PlyCount "99"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,99,17,17,17,16,10,8,58,7,16,29,14,14,28,0,0,0,0,4,3,4,14,8,14,6,6,6,
6,6,6,7,18,0,0,-8,-8,-7,-2,-8,-8,-8,-8,-7,-7,-16,-9,0,0,0,0,0,0,-97,-3,-3,-10,
-79,0,0,0,0,23,15,76,76,65,0,0,0,447,441,421,355,5393,5537,5285,5277,3652,1932,
11664,6175,29995,29996,29996,29997]} 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5.
g3 Ne4 6. Qd3 cxd4 7. Nxd4 Bxc3+ 8. bxc3 Nc5 9. Qf3 d6 {E20: Nimzo-Indian: 4
g3 and 4 f3.} 10. Bg2 Nbd7 11. O-O O-O {The position is equal.} 12. Nb3 (12.
Rd1 $14) 12... Qc7 13. Rd1 {[#]} Nb6 $146 ({Predecessor:} 13... Ne5 14. Qf4 Na4
15. c5 Nxc5 16. Ba3 Re8 17. c4 Rb8 18. Nxc5 dxc5 19. Bb2 f6 {1-0 (47)
Moiseenko,A (2628)-Donchenko,A (2615) Riga 2019}) 14. Nxc5 Qxc5 15. Be3 Qc7 16.
Bxb6 axb6 17. Qd3 Rd8 18. a4 Ra5 19. Rdb1 Bd7 20. Rb4 Bc6 21. Qd4 Bxg2 22. Kxg2
Rc5 23. Rab1 h6 24. Qd3 Rc6 25. a5 bxa5 26. Rxb7 Qc8 27. Qf3 Rf8 28. Rb8 Qd7
29. R1b7 Rc7 30. Rxf8+ Kxf8 $11 {[%mdl 4096] Endgame KQR-KQR} 31. Rb8+ (31. c5
{with more complications.} dxc5 32. Rb8+ Ke7 33. Rg8 g5 34. Qa8) 31... Ke7 32.
Rg8 $1 Qc6 33. e4 g6 34. Qe3 (34. c5 $11) 34... g5 (34... Qxc4 $17 {With the
idea ...g5.} 35. h4 e5) 35. h4 $1 {[%cal Rh4g5]} Qc5 {[#] Threatens to win
with ...Qxe3.} (35... Qxc4 $2 36. hxg5 h5 37. Qf4 $18) 36. Qf3 (36. Qd2 $11)
36... Qe5 ({Black should try} 36... gxh4 $17 37. Qg4 hxg3 38. Qh4+ f6 39. Rxg3
(39. Qxg3 Kd7 $17) 39... Qxc4 40. Rg7+ Kd8 41. Qxf6+ Kc8) 37. hxg5 hxg5 38. Ra8
Qc5 ({And not} 38... Rxc4 39. Ra7+ Kd8 40. Qxf7 Qxe4+ 41. Kh2 Qh4+ 42. Kg1
Qxg3+ 43. fxg3 Rc7 44. Qxc7+ Ke8 45. Qe7#) 39. Qh5 {aiming for Qh8.} Ra7 {[#]}
(39... Qxc4 $11 {remains equal.} 40. Qxg5+ {[%mdl 64] Double Attack} Kd7) 40.
Rg8 $1 $40 {[%cal Rg8g7][%mdl 128] Rg7! is the strong threat. White is out for
blood.} Qe5 41. Qg4 (41. f3 $1 $14 Qf6 42. Rxg5) 41... a4 $11 42. Rxg5 Qf6 {
[%mdl 8192]} (42... Qxc3 $11 {and Black has nothing to worry.} 43. Rg8 Qxc4)
43. c5 $18 dxc5 44. Rxc5 a3 $2 (44... Qh8 45. Rb5 Rd7 46. Qg5+ f6) 45. e5 Qh8
46. Qb4 {White wants to mate with Rc7+!} ({Less strong is} 46. Qg5+ f6 $18)
46... Qa8+ 47. Kh2 {White threatens Rc7+! and mate.} Ke8 48. Rb5 {Rb8+ would
kill now.} Qc6 49. Rb8+ Kd7 50. Qd4+ {[%mdl 64] Double Attack.  Weighted Error
Value: White=0.15/Black=0.52} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.31"]
[Round "13.1"]
[White "Anton Guijarro, David"]
[Black "Giri, Anish"]
[Result "1/2-1/2"]
[ECO "B90"]
[WhiteElo "2679"]
[BlackElo "2764"]
[Annotator "TA"]
[PlyCount "107"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,107,14,14,17,4,10,13,12,11,16,11,15,4,7,0,6,6,12,7,22,13,22,9,22,30,
30,29,39,30,33,13,40,0,58,65,88,73,66,60,84,95,107,96,100,72,78,61,66,54,57,49,
89,45,59,59,67,59,72,33,59,59,59,60,60,43,45,27,28,14,31,16,17,25,22,6,5,3,3,
10,3,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6
5. Nc3 a6 6. a4 e5 7. Nf3 Be7 8. Bg5 Be6 {B90: Sicilian Najdorf: Unusual White
6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 9. Bxf6 Bxf6 10. Nd5 Nd7 11. Bc4 Rc8 12.
Qe2 Nb6 13. Nxb6 Qxb6 14. Bxe6 fxe6 15. c3 O-O 16. O-O Qc6 {[#]} 17. Qd1 $5
$146 {[%mdl 8] New and interesting.} ({Predecessor:} 17. Ne1 Bd8 18. Nd3 Bb6
19. Kh1 Rf6 20. f3 Rcf8 21. Rfd1 h6 22. Nb4 Qc7 23. Nc2 {1/2-1/2 (30) Anand,V 
(2764)-Giri,A (2779) Paris 2019}) 17... Be7 18. Re1 Rf6 19. a5 Rcf8 20. Qa4 Qc8
21. Re3 Bd8 22. c4 Rf4 23. Qb3 Kh8 (23... Qc5 $11) 24. h3 $14 R4f6 25. Qd3 Qc5
26. Qc3 Bc7 27. b4 {[%cal Bb2b4,Bb4b5][%mdl 32]} Qc6 28. b5 Qc5 29. b6 Bb8 30.
Qb3 h6 31. Ra2 Rc8 32. Ra4 Rf7 33. Re1 Rd8 34. Qb4 Qc6 35. Raa1 Rf4 36. Qa4 (
36. Nd2 {looks sharper.} Qd7 37. f3 Rc8 38. Rac1 Rff8 39. Nb3) 36... Rc8 37.
Qxc6 Rxc6 38. Nd2 Rf8 39. Red1 Kg8 40. f3 Kf7 41. Kf1 Ke7 42. Ke2 Rc5 43. h4
Rd8 44. Ra2 {The position is equal.} d5 45. cxd5 exd5 46. exd5 Rdxd5 47. Rda1
Bd6 48. Ne4 Rc4 49. Rd2 Rxd2+ 50. Nxd2 Rc5 51. h5 e4 52. Nxe4 Rxh5 53. Kd3 Kd7
54. Kc4 {Weighted Error Value: White=0.08/Black=0.08} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.31"]
[Round "13.2"]
[White "Donchenko, Alexander"]
[Black "Esipenko, Andrey"]
[Result "0-1"]
[ECO "A13"]
[WhiteElo "2668"]
[BlackElo "2677"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 14,84,16,39,30,22,29,22,28,22,14,30,22,22,33,20,26,36,35,35,30,31,31,12,
26,-15,-7,-21,0,-1,0,-11,0,0,0,0,0,0,0,-3,-4,-50,-62,-59,-56,-112,-119,-118,
-118,-145,-164,-145,-131,-124,-166,-198,-196,-412,-425,-425,-417,-425,-417,
-547,-519,-575,-535,-1473,-1349,-29980,-29982,-29982,-29983]} 1. c4 Nf6 2. g3
e6 3. Bg2 d5 4. Nf3 dxc4 5. Qa4+ Nbd7 6. Qxc4 a6 7. Qc2 c5 8. Nc3 Qc7 {A13:
English Opening: 1...e6.} 9. O-O b6 10. d4 Bb7 {The position is equal.} 11. Bf4
Bd6 12. Bxd6 Qxd6 13. Rfd1 O-O 14. e4 Qc7 15. Rac1 {[%cal Ba1c1,Bc1c2,Bc2d2]
[%mdl 32]} cxd4 16. Nxd4 Rad8 {[#]} 17. Qe2 $146 {Strongly threatening Nd5.} ({
Predecessor:} 17. f4 e5 18. Nd5 Qxc2 19. Nxc2 exf4 20. gxf4 Nc5 21. Nce3 Bxd5
22. exd5 Rfe8 23. Nc4 {1-0 (51) Giri,A (2779)-Karjakin,S (2748) Riga 2019})
17... Qb8 $1 18. Rc2 b5 19. Nb3 (19. e5 $5 Bxg2 20. exf6 $11) 19... Ne5 20. Nc5
Bc8 21. Rcd2 Qc7 {Hoping for ...Rxd2.} 22. Nd3 Nxd3 23. Rxd3 b4 24. Rxd8 Rxd8
25. Rxd8+ Qxd8 26. Nd1 Bb7 27. e5 Bxg2 28. Kxg2 Qd5+ $1 29. Kg1 {[#]} ({
White should play} 29. Qf3 $15 Ne4 30. Ne3 Qxe5 31. Qe2) 29... Nd7 $1 $17 30.
Ne3 Qxa2 31. Qd1 Nf8 32. Qd4 a5 33. Nc4 h5 34. Nd6 Ng6 35. Qa7 $2 {[#]} (35.
Kf1 {was worth a try.}) 35... Qb1+ $1 $19 36. Kg2 Nxe5 37. Qxa5 Qxb2 38. Qa8+
Kh7 39. Qe4+ f5 40. Qh4 Qe2 41. Qxb4 Nd3 42. Qb6 h4 {Weighted Error Value:
White=0.47/Black=0.02} 0-1

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.31"]
[Round "13.3"]
[White "Carlsen, Magnus"]
[Black "Vachier-Lagrave, Maxime"]
[Result "1-0"]
[ECO "D85"]
[WhiteElo "2862"]
[BlackElo "2784"]
[Annotator "TA"]
[PlyCount "79"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 12,79,47,12,31,0,1,2,8,0,17,0,0,0,14,14,0,0,0,0,0,0,8,8,17,16,43,37,35,
39,81,70,70,68,79,81,67,57,112,111,120,105,83,72,68,15,82,79,203,175,190,182,
233,190,287,277,276,267,312,310,422,381,734,734,733,733,731,732,708,635]} 1. d4
Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Qa4+ Qd7 {
D85: Exchange Grünfeld: Unusual White 7th moves and lines with 7 Nf3.} 8. Qa3
b6 9. Nf3 c5 {The position is equal.} 10. Be3 O-O 11. Rd1 cxd4 12. cxd4 Qd6 13.
Qxd6 exd6 {[#]} 14. Rc1 $146 ({Predecessor:} 14. Bc4 Bb7 15. Nd2 Na6 16. O-O
Nb4 17. d5 f5 18. Bf4 Rad8 19. g3 h6 20. h4 {1/2-1/2 (39) Debashis,D (2503)
-Cheparinov,I (2681) Caleta 2015}) 14... Bb7 15. Bd3 Nc6 16. Kd2 Rac8 17. h4
Nb4 18. Bb1 Rce8 19. a3 Nc6 20. Ba2 Rxe4 21. Bd5 $1 {[%csl LRc6,LRe4][%mdl 64]
[#] Double Attack} Na5 22. Bxe4 Bxe4 23. Rc7 a6 24. h5 b5 ({Black should play} 
24... Re8 $14) 25. h6 $16 Bf6 26. Bg5 Bh8 27. Rh4 Bd5 28. Kc3 ({White should
try} 28. Kd3 $14) 28... Nc4 {[#]} (28... Nc6 $11) 29. Nd2 $1 $36 {[%cal Rd2c4]
[%mdl 2048] White is in control.} Nxa3 {This costs Black the game.} (29... Nb6
$16 {was worth a try.}) 30. Kb4 $18 {And now Be7 would win.} Nc4 31. Nxc4 Bxc4
(31... bxc4 {was necessary.} 32. Be7 Rb8+ 33. Ka4 Ra8) 32. Be7 Re8 (32... Ra8
$142) 33. Rf4 ({Much less strong is} 33. Bxd6 $6 Rd8 $16) 33... f5 34. g4 ({
Don't do} 34. Bxd6 $6 Bf6 $16) 34... Kf7 35. Bxd6+ Ke6 36. Bc5 Bf6 $2 (36...
a5+ 37. Kxa5 Kf6 38. gxf5 Ra8+ 39. Kb4 gxf5 40. Rxh7 Kg5) 37. gxf5+ {White is
clearly winning.} gxf5 38. Rc6+ {[%mdl 64] Double Attack} Kf7 39. Rxf5 Re6 40.
d5 {Weighted Error Value: White=0.07/Black=0.25} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.31"]
[Round "13.4"]
[White "Van Foreest, Jorden"]
[Black "Grandelius, Nils"]
[Result "1-0"]
[ECO "B90"]
[WhiteElo "2671"]
[BlackElo "2663"]
[Annotator "TA"]
[PlyCount "93"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,93,32,28,0,10,24,12,0,0,0,0,0,0,-33,-37,-43,-18,0,0,0,2,0,12,18,16,14,
22,10,71,71,62,65,108,100,93,96,81,88,105,102,167,133,133,130,108,97,85,45,233,
235,224,222,543,349,341,341,702,696,783,755,677,391,479,460,506,520,517,502,
516,496,656,607,29966,12791,29972,29973,29960,6393,29981,29978,29990,29991,
29992,29993,29996,29995]} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6
6. Qd3 {B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.
} Nbd7 7. Be2 b5 8. a4 {[#] The position is equal.} Nc5 $146 ({Predecessor:} 
8... b4 9. Nd5 Bb7 10. Nxf6+ Nxf6 11. Bf3 Qc7 12. O-O e6 13. Bg5 Be7 14. Rfd1
O-O {0-1 (31) Socko,M (2421)-Sarana,A (2636) Tornelo INT 2020}) 9. Qe3 b4 10.
Nd5 Ncxe4 11. a5 (11. Nxb4 {with more complications.} Qc7 12. f3 Nc5 13. O-O g6
14. Rd1) 11... Nxd5 12. Qxe4 e6 (12... Bb7 {is more complex.} 13. O-O Qc8 14.
Nf5 e6 15. Re1 g6) 13. O-O $36 {[%mdl 2048] White has some pressure.} Bd7 14.
Bd2 Be7 15. Bf3 O-O 16. Qd3 Qb8 17. c4 bxc3 $1 18. bxc3 Ra7 (18... Bf6 $11 {
remains equal.}) 19. Rfb1 Qc8 20. c4 Nf6 {[#]} 21. Nb5 $1 {[%cal Rb5a7]} axb5
22. cxb5 Bxb5 23. Qxb5 {Black must now prevent Be3.} Nd7 24. Bb7 {[%mdl 1024]
White has strong compensation.} Qd8 (24... Qc7 $16) 25. a6 $18 Bf6 26. Ba5 Qe8
27. Bc7 Bxa1 28. Rxa1 d5 $2 {Now Black is done in.} ({Black should try} 28...
Nc5 $14 29. Qb6 Qd7) 29. Bd6 Qd8 30. Rc1 g6 $2 (30... Re8 31. Rc7 Nb8) 31. h3
Re8 32. Rc7 Nf6 $2 (32... Nb8 33. Rc8 {[%mdl 64] Discovered Attack} Qxc8 34.
Bxc8 Rxc8) 33. Be5 Ne4 34. Qc6 Rf8 35. Bd4 Qb8 36. f3 Rxa6 37. Bxa6 (37. Qxa6
$2 {perishes.} Qxc7 38. fxe4 Rb8 $19) 37... Qb4 38. Be5 ({Weaker is} 38. fxe4
Qxd4+ 39. Kh2 Qe5+ 40. Kg1 Qd4+ 41. Kh2 Qe5+ 42. Kg1 Qd4+ $14) 38... Qe1+ 39.
Kh2 Nf2 40. Qc3 Qh1+ 41. Kg3 Qg1 42. Rc8 Nh1+ 43. Kh4 {[#] Threatening mate
with Rxf8+.} Qf2+ 44. g3 {White mates.} g5+ 45. Kxg5 f6+ 46. Kh6 fxe5 47. Qxe5
{Accuracy: White = 86%, Black = 51%.} 1-0

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.31"]
[Round "13.5"]
[White "Tari, Aryan"]
[Black "Caruana, Fabiano"]
[Result "1/2-1/2"]
[ECO "C01"]
[WhiteElo "2625"]
[BlackElo "2823"]
[Annotator "TA"]
[PlyCount "84"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 16,84,7,0,0,0,0,0,17,0,0,16,22,0,0,0,0,-27,4,-22,-8,-16,0,-24,0,-27,-20,
-16,-19,-11,0,0,0,-19,-12,-22,-4,-12,-13,-6,-17,-13,0,0,0,0,0,0,33,0,33,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]} 1. e4 e6 2. d4 d5 3. exd5 exd5 4. Nf3 Nc6
5. Bd3 Bg4 6. c3 Bd6 7. O-O Nge7 8. Nbd2 Qd7 9. b4 O-O $1 {The main line 9...
0-0 scores better than 9...Ng6. C01: French: Exchange Variation.} 10. Re1 Rae8
11. Nf1 Ng6 {[#] White must now prevent ...Bxf3.} 12. Ne3 {[#]} f5 $146 ({
Predecessor:} 12... Nf4 13. Nxg4 Qxg4 14. Bxf4 Bxf4 {1/2-1/2 (14) Djuric,Z 
(2234)-Milanovic,S (2340) Serbia 2008}) 13. Nxg4 fxg4 14. Bxg6 (14. Rxe8 {
with more complications.} Qxe8 15. Ne1 Nh4 16. g3 Qh5 17. a4) 14... hxg6 15.
Rxe8 Rxe8 16. Ne1 Nd8 17. g3 Nf7 18. Ng2 c6 19. Bd2 Bc7 20. Qc2 Qf5 21. Ne3 Qh5
{[#] And now ...Ng5 would win.} 22. Ng2 Qf5 23. Ne3 Qh5 {Strongly threatening .
..Ng5.} 24. Ng2 Bd8 25. Rf1 Nd6 26. Bf4 $1 {[%cal Rf4d6]} Ne4 27. c4 Bf6 28.
cxd5 Qxd5 29. Ne3 Qe6 30. Be5 Bxe5 31. Qxe4 Bd6 (31... Bf6 $5 {[%cal Re6e4]}
32. Qxe6+ Rxe6 $11) 32. Qb1 Qe4 33. Qb3+ Kh7 {The position is equal.} 34. b5 c5
35. dxc5 (35. Re1 {feels hotter.} Qf3 36. Qd1 Bf8 37. d5 Re4 38. Qxf3 gxf3 39.
Kf1) 35... Bxc5 36. Rc1 Bxe3 37. Qxe3 Qxe3 38. fxe3 Rxe3 $11 {KR-KR} 39. Rc7
Ra3 40. Rxb7 Rxa2 41. b6 axb6 42. Rxb6 Kh6 {An uneventful encounter.  Weighted
Error Value: White=0.06/Black=0.07} 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.31"]
[Round "13.6"]
[White "Firouzja, Alireza"]
[Black "Wojtaszek, Radoslaw"]
[Result "1/2-1/2"]
[ECO "D02"]
[WhiteElo "2749"]
[BlackElo "2705"]
[Annotator "TA"]
[PlyCount "125"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 9,125,29,27,31,32,13,30,0,0,-5,-10,-7,-4,-7,0,0,18,14,33,33,50,68,70,0,
41,48,46,45,55,19,58,41,82,74,64,75,70,71,49,36,71,58,80,72,79,59,87,80,78,77,
82,56,97,87,79,88,117,110,114,97,122,108,115,133,147,70,46,51,68,66,66,67,108,
83,91,92,96,70,102,106,102,94,94,95,100,87,85,60,100,31,19,22,73,90,139,41,63,
45,225,214,180,175,163,147,165,166,191,86,125,93,162,60,35,35,34,53,53,0]} 1.
Nf3 d5 2. g3 Nd7 3. d4 Nb6 4. Nc3 {[#]} Nf6 $146 ({Predecessor:} 4... Bf5 5. a4
a5 6. Nh4 e6 7. Bg2 Nf6 8. Nxf5 exf5 9. O-O Bb4 10. Qd3 g6 11. Bg5 {0-1 (39)
Svane,R (2349)-Bluebaum,M (2470) Playchess.com INT 2020}) 5. a4 a5 6. Bg2 {
D02: 1 d4 d5 2 Nf3 sidelines, including 2...Nf6 3 g3 and 2...Nf6 3 Bf4.} h6 7.
O-O Bf5 8. Nh4 {White has an edge.} Bh7 9. f4 e6 10. f5 Be7 11. Bh3 Qd7 12. Qd3
Qc6 13. Nb5 Nc4 14. Bf4 Nd6 15. Qe3 Nc4 16. Qd3 (16. Qf3 $14 e5 17. dxe5 (17.
Bxe5 O-O $11)) 16... Bd6 17. Nxd6+ Nxd6 {[%cal Bc4d6,Bd6e4,Be4d2][%mdl 32]} 18.
Be5 Nde4 19. Qa3 Qd7 20. c4 c6 21. fxe6 fxe6 22. cxd5 Nxd5 23. Bg2 Nd2 24. Rfc1
Rf8 25. Nf3 Nxf3+ 26. Bxf3 {aiming for Rf1.} Kf7 27. e4 Nb4 28. Qe3 Kg8 29. Rc3
Rad8 30. h4 b6 31. Be2 Qe7 32. Bg4 Qf7 33. h5 Qe7 34. Rac1 Qe8 35. Bc7 Rd7 36.
Bxb6 {And now Bc5 would win.} Na2 37. Rxc6 ({Better is} 37. Bxa5 $16 Nxc1 38.
Rxc1) 37... Nxc1 $14 38. Rxc1 Rb7 39. Bc5 Rff7 40. b3 Rfc7 41. Re1 Rc6 42. Be2
Qb8 43. Bb5 Rc8 44. Bc4 $1 {[%cal Rc4e6]} Kh8 45. Rf1 Bg8 46. Kg2 Rd7 47. Rf2
Qb7 48. Re2 Qc7 49. Ba3 ({White should try} 49. e5 $16) 49... Qb6 50. Bb2 Bh7 (
50... Rf8 $11 {keeps the balance.}) 51. Qf4 $16 Bg8 52. Qg4 (52. d5 $1 $16 exd5
53. exd5) 52... Rcd8 53. Bc3 Qc6 $2 (53... Rxd4 $14 54. Bxd4 Rxd4) 54. Bxa5 $18
Rb8 55. Qf4 Rdb7 56. Qe3 Qe8 57. g4 Qd7 {[#] intending ...e5.} 58. Qg3 (58. Kh3
$1 $18) 58... Qxd4 $16 59. Bc3 Qd1 {[#]} (59... Qd8 $16) 60. Rd2 (60. Be5 $1
$18 {Threatens to win with g5.} Rc8 61. Qe1) 60... Qb1 $1 $14 {White is
slightly better.} 61. Qf4 {Strongly threatening Rb2.} e5 $1 {[%cal Re5f4]} 62.
Bxe5 Bxc4 63. bxc4 {Weighted Error Value: White=0.17/Black=0.17} (63. Bxb8 $14
Rf7 64. Qe3 (64. bxc4 Rxf4 65. Bxf4 Qxe4+ {[%mdl 64] Double Attack} 66. Kg3
Qxc4 $17) 64... Bxb3 65. Bf4 Bxa4 66. Kg3) 1/2-1/2

[Event "83rd Tata Steel Masters 2021"]
[Site "Wijk aan Zee"]
[Date "2021.01.31"]
[Round "13.7"]
[White "Duda, Jan-Krzysztof"]
[Black "Harikrishna, Pentala"]
[Result "1/2-1/2"]
[ECO "D46"]
[WhiteElo "2743"]
[BlackElo "2732"]
[Annotator "TA"]
[PlyCount "115"]
[EventDate "2021.01.16"]
[EventType "tourn"]
[EventCountry "NED"]
[Tiebreak "Koya+Number of wins"]
[SourceTitle "playchess.com"]
[Source "ChessBase"]
[SourceQuality "1"]

{[%evp 24,115,33,18,20,17,23,-31,17,16,19,15,14,16,20,18,14,15,13,18,13,21,20,
11,10,9,13,8,11,10,10,11,24,12,16,18,20,18,15,7,25,21,26,25,26,11,12,0,43,6,14,
12,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0]} 1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Qc2 Bd6 7. Bd3
O-O 8. O-O e5 9. cxd5 cxd5 10. e4 exd4 11. Nxd5 Nxd5 12. exd5 h6 13. Nxd4 {
13.b3 is vanishing.} Qh4 {[%csl Gd6][%cal Rh4h2] [#] D46: Semi-Slav: 5 e3 Nbd7
6 Bd3, Black avoids the Meran.} 14. Nf3 Qh5 15. Bh7+ Kh8 {Black is slightly
better.} 16. Qf5 Qxf5 17. Bxf5 Nf6 18. Bxc8 Rfxc8 19. Rd1 Rd8 20. Be3 Be7 21.
d6 Rxd6 22. Rxd6 Bxd6 23. Rd1 Be7 {[#]} 24. Kf1 $146 ({Predecessor:} 24. g3 Kg8
25. Kg2 Kf8 26. Ne5 Ke8 27. Kf3 Nh7 28. h4 Nf8 29. h5 f6 30. Nc4 {0-1 (48)
Yilmaz,M (2636)-Potkin,V (2597) St Petersburg 2018}) 24... a6 25. h3 Kg8 26.
Ke2 Re8 27. Ne5 Rc8 28. g4 Rc2+ 29. Rd2 Rxd2+ 30. Bxd2 $11 {[%mdl 4096]
Endgame KBN-KBN} Kf8 31. Nc4 Nd5 32. Na5 b6 33. Nc6 Bg5 34. Bxg5 hxg5 {KN-KN}
35. Kf3 a5 36. Ke4 Nf4 {The position is equal.} 37. Ne5 Nxh3 38. Ke3 Ke7 39.
Nc4 b5 40. Nxa5 Kd6 41. Nb3 Kd5 42. Nc1 Nf4 43. Ne2 Ne6 44. Nc3+ Kc4 45. Ne4 {
aiming for Nd6+.} Kd5 46. Nc3+ Kc4 47. f3 g6 48. Ne4 {Hoping for Nd6+.} Kd5 49.
Nc3+ Kc4 50. Ne4 {And now Nd6+ would win.} Kd5 51. Kd3 f5 52. Nc3+ Kc5 53. Ne2
b4 54. a3 bxa3 55. bxa3 Nc7 56. Ng3 Nb5 57. a4 Nd4 58. a5 {A rather calm draw.
Weighted Error Value: White=0.04/Black=0.02} 1/2-1/2

