[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 "4.3"]
[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

