[Event "Airthings Masters Preliminary"]
[White "Harikrishna,Pentala"]
[Black "Vachier-Lagrave,Maxime"]
[Site "Online"]
[Round "1.1"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2732"]
[BlackElo "2784"]
[PlyCount "54"]

1. e4 {} c5 2. Nf3 d6 3. Bb5+ Nd7 4. 0-0 a6 5. Bd3 Ngf6 6. c3 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7.} b5 7. a4 Bb7 8. axb5 axb5 9. Rxa8 Qxa8 10. Bxb5 Bxe4 11. d4 Bxb1 12. dxc5 {
[#] Strongly threatening c6.} Be4 {And now ...Bc6 would win.} ({Weaker is} 12... dxc5 13. Ne5 $18 )13. Re1 $1 e6 {Threatens to win with ...Bxf3.} (13... Bxf3 $5 14. gxf3 Kd8 15. cxd6 exd6 $17 )14. Rxe4 {The position is equal.} Qxe4 15. c6 {Ng5 is the strong threat.} Be7 {[#] aiming for ...Nb6.} 16. Nd2 $1 Qd5 17. cxd7+ Nxd7 18. Qa4 Qb7 19. Bc6 Qc7 {[#]} 20. Nc4 $146 ({Predecessor:} 20. Ne4 f5 21. Ng5 Bxg5 22. Bxg5 Rg8 23. g4 fxg4 24. Qxg4 Kf7 25. Qh5+ Kf8 26. Bxd7 Qxd7 {1/2-1/2 (117) Jones,G (2677)-Mekhitarian,K (2543) Batumi 2018} )d5 21. Ne5 Qxe5 {} 22. Bxd7+ Kd8 {} 23. Qa8+ Kxd7 {
} 24. Qa4+ Kd8 {} 25. Qa8+ $1 Kd7 {} 26. Qa4+ Kd8 {} 27. Qa8+ $1 Kd7 { A rather calm draw. 
Weighted Error Value: White=0.01/Black=0.02} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Dubov,Daniil"]
[Black "Radjabov,Teimour"]
[Site "Online"]
[Round "1.2"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2699"]
[BlackElo "2765"]
[PlyCount "72"]

1. d4 {} Nf6 2. Nf3 d5 3. c4 e6 4. g3 Be7 5. Bg2 0-0 6. Qc2 c5 7. dxc5 Qa5+ 8. Nc3 $1 {8.Nc3 scores better than 8.Nbd2.} dxc4 {E06: Closed Catalan:
Early deviations.} 9. 0-0 Qxc5 10. Bg5 Nc6 11. Bxf6 Bxf6 12. Ne4 Qf5 13. Rfd1 {
[#]} Bxb2 $146 ({Predecessor:} 13... e5 14. Qxc4 Be6 15. Nxf6+ Qxf6 {1/2-1/2 
(15) Ippolito,D (2370)-Ringoir,T (2473) Charlotte 2016} )14. Qxb2 {Nd4 is the
strong threat.} Qxe4 15. Rac1 e5 {[#]} 16. Nd4 $1 { Pin} Qg6 17. Nxc6 bxc6 18. Rxc4 Be6 19. Rxc6 Rab8 20. Qxe5 Rb1 21. Rcc1 Rxc1 22. Rxc1 Bxa2 23. Qa5 Be6 24. Qxa7 Qg5 25. f4 Qb5 26. e4 g6 27. h4 Rd8 28. f5 (28. Qf2 $14 )gxf5 $11 {The position is equal.} 29. Qe7 Qb6+ 30. Kh2 {And now Qg5+ would win.
} fxe4 31. Qg5+ Kf8 32. Re1 Rd4 33. Qf6 (33. Bxe4 $2 Rxe4 $1 {} 34. Rxe4 (34. Qh6+ $2 Ke8 $19 )Qf2+ 35. Kh1 Qf3+ 36. Kg1 Qxe4 $19 )Kg8 34. Qg5+ Kf8 35. Qf6 ({Avoid the trap} 35. Bxe4 $2 {[#]} Rxe4 $1 {} 36. Rxe4 (36. Qh6+ $2 Ke8 $19 )Qf2+ 37. Kh1 Qf3+ 38. Kg1 Qxe4 $19 )Kg8 36. Qg5+ Kf8 {Weighted Error Value: White=0.05/Black=0.03} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Anton Guijarro,David"]
[Black "So,Wesley"]
[Site "Online"]
[Round "1.3"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2675"]
[BlackElo "2770"]
[PlyCount "128"]

1. e4 {} e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. d4 Nd6 6. Bxc6 dxc6 7. dxe5 Nf5 8. Qxd8+ Kxd8 9. h3 Ne7 10. Rd1+ Ke8 11. Nc3 {
} Ng6 12. Be3 {C67: Ruy Lopez: Berlin Defence:
4 0-0 Nxe4.} (12. b3 {is more complex.} h5 13. Bb2 Be7 14. Re1 Be6 15. Nd4 )Be7 13. Rd2 h5 14. Re1 h4 15. Ne4 {[#]} (15. Nd4 $5 {} )Rh5 $146 ({Predecessor:} 15... Bf5 16. Bg5 Bxg5 17. Nexg5 Rh5 18. g4 hxg3 19. fxg3 Bxh3 20. Nxh3 Rxh3 21. e6 Rxg3+ 22. Kf2 Rg4 23. Rd7 Rc8 24. Rxf7 Nf8 25. Rh1 {1-0 (25) Caruana,F (2835)-So,W (2770) Lichess.org INT 2020} )16. Bg5 {
Nf6+ is the strong threat.} Be6 17. Bxe7 Kxe7 18. Neg5 Bd5 19. e6 f6 20. c4 $1 $36 { White has some pressure.} Bxc4 21. Rd7+ Kf8 22. Rxc7 {Threatens to win with e7+.} fxg5 (22... Rxg5 $11 23. Rf7+ (23. Nxg5 fxg5 24. Rxb7 Nf4 $11 )(23. Rxb7 $2 Rh5 $19 )Kg8 24. Nxg5 fxg5 )23. e7+ $16 Ke8 {[#]} 24. Nd4 $1 { aiming for Nf5.} g4 ({Wrong is} 24... Bxa2 $2 25. Nf5 $18 )25. hxg4 Rg5 26. Nf5 Rxf5 27. gxf5 Nf4 {[#]} 28. Re4 $1 {
 White has strong compensation.} Nd5 29. Rxb7 Ba6 30. Rb3 Nf6 31. Re1 Bc8 32. Rb4 Bxf5 33. Rxh4 {And now Rh8+ would win.} Kd7 34. Rd4+ Kc7 35. g4 Bd7 36. f3 Nd5 37. Kf2 Kd6 38. Kg3 Be6 (38... Re8 $14 )39. f4 Bf7 40. f5 Re8 41. g5 a6 42. g6 Bg8 43. Kg4 ({Much weaker is} 43. f6 $6 gxf6 44. g7 a5 $11 )Rxe7 44. Rxe7 Kxe7 45. Kg5 Nc7 46. Re4+ Kd6 47. b3 {
Black must now prevent f6.} (47. a3 {feels hotter.} Bd5 48. Rb4 Ne8 49. Rb7 c5 50. Rf7 )c5 (47... Bd5 $1 $14 48. Rb4 c5 )48. Rh4 ({White should try} 48. f6 $16 Ne6+ 49. Kg4 gxf6 50. Kf5 )Ne8 $11 49. Ra4 Nf6 50. Rxa6+ Ke5 51. Ra7 Ne4+ 52. Kg4 {Strongly threatening Re7+.} Nf6+ 53. Kh4 Kxf5 {The position
is equal.} 54. Rxg7 c4 55. bxc4 Bxc4 56. a4 Bf1 57. a5 Bd3 58. Kh3 Kg5 59. Kg2 Kh6 60. Rc7 {Hoping for g7.} Kxg6 61. Kf2 Kf5 62. Ke3 Nd5+ { Double
Attack} 63. Kxd3 {White threatens Rb7 and mate.} Nxc7 64. a6 Nxa6 {Weighted
Error Value: White=0.07/Black=0.06} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Carlsen,Magnus"]
[Black "Aronian,Levon"]
[Site "Online"]
[Round "1.4"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2862"]
[BlackElo "2781"]
[PlyCount "122"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 (4... Be7 5. cxd5 exd5 6. Bf4 c6 7. Qc2 g6 8. e3 Bf5 9. Bd3 Bxd3 10. Qxd3 Nbd7 11. h4 a5 12. Kf1 a4 13. a3 Qb6 14. Qc2 h5 15. Bg5 0-0 16. Ne5 Rfe8 17. Bxf6 Nxf6 18. Rh3 Qb3 {
0-1 (58) Carlsen,M (2863)-Aronian,L (2767) Stavanger 2020} )5. cxd5 exd5 6. Bf4 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} c6 7. e3 Bf5 8. Qb3 {White has an edge.} Qb6 9. Nh4 {[#]} Bg6 $146 ({Predecessor:} 9... Be6 10. Bd3 Be7 11. Qc2 Nh5 12. Bg3 Nxg3 13. hxg3 g6 14. f4 Rg8 15. Nf3 Nd7 16. Rxh7 {
1-0 (30) Le,Q (2709)-Gajewski,G (2616) chess.com INT 2020} )10. Nxg6 hxg6 11. h3 Nbd7 12. Bd3 c5 {Hoping for ...c4.} 13. a3 Ba5 14. Qxb6 Bxb6 15. dxc5 Nxc5 16. 0-0-0 0-0-0 17. Kb1 Ne6 18. Be5 Bc7 19. Bxc7 Kxc7 20. Bc2 g5 21. Bb3 Kc6 22. Rc1 Kd6 23. Nb5+ Ke5 24. Nxa7 Ne4 25. Nb5 g4 26. Rc2 ({Better is} 26. hxg4 $16 Nxf2 27. Rhf1 Nxg4 28. Rxf7 )Rh5 27. f3 gxf3 28. gxf3 Ng3 29. Rd1 Nf5 {[#]} 30. Rc3 Ne7 31. Nc7 g5 {[#]} 32. Nxe6 (32. e4 $1 $16 )fxe6 $14 33. Rc7 Nf5 34. e4 Nd4 35. Rxb7 Rxh3 (35... dxe4 $15 36. fxe4 Rxh3 )36. exd5 $11 exd5 37. Re7+ (37. Rb4 {is interesting.} Rxf3 38. Re1+ Kf5 39. Bd1 Rf4 40. Rb7 )Kd6 (37... Kf6 {is interesting.} 38. Re3 Nxf3 39. Rf1 g4 40. Bd1 d4 )38. Re3 Nxb3 39. Rxb3 $14 { Endgame KRR-KRR} Rf8 40. Rdd3 Rf4 41. Kc2 Ke5 42. Rb5 Rd4 {} (42... Rh2+ $16 43. Kb3 Rd4 )43. Rxd4 $2 (43. f4+ $1 $18 Ke4 44. Rxh3 gxf4 45. Rb7 )Kxd4 $18 {KR-KR. The position is equal.
} 44. Rb3 Rh2+ 45. Kb1 Rh3 (45... Rh1+ {seems wilder.} 46. Ka2 Kc4 47. Rb4+ Kd3 48. a4 d4 )46. Ka2 Kc4 47. Rc3+ Kb5 48. Kb3 d4 49. Rd3 Kc5 {...g4! is the
strong threat.} 50. Kc2 $1 Rg3 51. a4 Rg2+ 52. Rd2 Rg3 53. Rf2 Kb4 54. b3 g4 55. fxg4 d3+ 56. Kd2 Rxg4 57. Kxd3 Rg3+ 58. Kc2 Rc3+ 59. Kb1 {Strongly
threatening Ka2.} Rxb3+ 60. Rb2 Rxb2+ 61. Kxb2 Kxa4 {Weighted Error Value:
White=0.17/Black=0.10} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Giri,Anish"]
[Black "Nepomniachtchi,Ian"]
[Site "Online"]
[Round "1.5"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2764"]
[BlackElo "2784"]
[PlyCount "83"]

1. d4 {} Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 (4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Bc4 c5 8. Ne2 0-0 9. 0-0 Nc6 10. Be3 Bg4 11. f3 Bd7 12. Rb1 Qc7 13. Qd2 Rfd8 14. Rfc1 Be8 15. h4 e5 16. Bd5 cxd4 17. cxd4 exd4 18. Nxd4 Qe5 19. Ne2 b6 20. Bf4 Qe7 {
1/2-1/2 (40) Giri,A (2764)-Nepomniachtchi,I (2784) chess24.com INT 2020} )Bg7 5. h4 c6 6. cxd5 {D90: Grünfeld: 4 Nf3 Bg7 sidelines.} cxd5 7. Bf4 Nc6 8. e3 0-0 9. Qb3 $1 {9.Qb3 scores better than 9.Ne5.} a6 10. Rc1 {[#]} Re8 $146 ({
Predecessor:} 10... b5 11. Ne5 Na5 12. Qb4 Nh5 13. Bh2 Bxe5 14. Bxe5 Nc6 {
1-0 (44) Sargsyan,S (2416)-Hayrapetyan,H (2502) Yerevan 2017} )11. Be2 Bg4 (11... Na5 $11 12. Qa3 Bg4 )12. Qxb7 $16 Bxf3 13. Bxf3 e5 14. dxe5 ({Reject} 14. Qxc6 $6 exf4 15. Nxd5 (15. Bxd5 $2 Rc8 $19 )Nxd5 $11 )Nxe5 15. Bxe5 Rxe5 16. 0-0 Re7 17. Qb3 Rb8 18. Nxd5 (18. Qc2 $16 )Rxb3 $14 {[#]} 19. Rc8 $1 {} Re8 (19... Rd7 20. Rxd8+ )20. Rxd8 Rxd8 21. Nxf6+ Bxf6 22. axb3 Bxh4 { Endgame KRB-KRB} 23. Ra1 Rd6 24. g3 Bf6 25. Ra2 h5 26. Be2 h4 27. gxh4 Rd2 28. Kf1 Bxh4 29. Ra4 g5 {The position is equal.} 30. f4 Rxb2 31. fxg5 Bxg5 32. Rg4 f6 33. Bxa6 Kf8 34. e4 Rxb3 35. e5 Rf3+ 36. Kg2 Rf4 37. Rxf4 (37. Kg3 {seems wilder.} Rf5 38. exf6 Ra5 39. Bc4 Bxf6 40. Re4 )Bxf4 38. exf6 Be5 39. Kf3 Bxf6 40. Ke4 Bh8 41. Kf5 Kg7 42. Bc4 {Weighted Error
Value: White=0.05/Black=0.08} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Grischuk,Alexander"]
[Black "Nakamura,Hikaru"]
[Site "Online"]
[Round "1.6"]
[Annotator "TA"]
[Result "0-1"]
[Date "2020.12.23"]
[WhiteElo "2777"]
[BlackElo "2736"]
[PlyCount "128"]

1. e4 {} e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. 0-0 h6 {
6...h6 is the recent fashion.} 7. Re1 0-0 {C54: Giuoco Piano: 4 c3 Nf6, main
lines with 5 d4 and 5 d3.} 8. Nbd2 a5 9. Nf1 Be6 {The position is equal.} 10. Bb5 Ne7 11. d4 exd4 12. cxd4 Bb6 13. Ng3 d5 14. e5 Ne4 15. Bd3 Nxg3 16. hxg3 Bg4 17. Be3 a4 18. Rc1 Qd7 {[#]} 19. Kh2 $146 ({Predecessor:} 19. a3 Rfe8 20. Kh2 Nf5 21. Bb1 Nxe3 22. Rxe3 Bf5 23. Ba2 c6 24. Nh4 Bh7 25. f4 {1/2-1/2 (37)
Ding,L (2791)-Nakamura,H (2736) chess24.com INT 2020} )Bh5 20. e6 fxe6 {
[#]} 21. Ne5 $1 Qe8 22. g4 Bg6 23. Nxg6 Nxg6 {
} 24. g5 (24. Bc2 $11 )Nf4 25. gxh6 Nxd3 26. Qxd3 Qh5+ 27. Kg1 c6 28. hxg7 Rf6 29. f3 (29. Qe2 $1 $11 {remains equal.} Qf5 30. g3 )Bc7 $17 30. Bf2 ({White must play} 30. Kf2 $1 $15 Qh2 31. Rg1 )Kxg7 31. Kf1 Rg6 32. g4 Qh2 33. Ke2 Bg3 34. Rf1 e5 (34... Rf8 $17 {Hoping for ...Qg2.} 35. Kd1 Bxf2 )35. dxe5 $1 $11 Re8 {And now ...Bxf2 would win.} 36. Kd1 Bxf2 37. Rc2 Qxe5 (37... Qf4 {is more complex.} 38. Rcxf2 Rxe5 39. Re2 Rh6 40. Rfe1 Rxe2 41. Qxe2 Rf6 )38. Rcxf2 Qe3 (38... Qf4 {looks sharper.} 39. Re2 Rxe2 40. Qxe2 Rf6 41. Kc2 Kf7 )39. Qxe3 Rxe3 { Endgame KRR-KRR} 40. Re2 Rge6 41. Rfe1 (41. Rg2 $11 {keeps the balance.} )Rd3+ $17 42. Kc2 Rxe2+ 43. Rxe2 Rxf3 {KR-KR
} 44. Re7+ Rf7 45. Re6 Rf2+ 46. Kc3 Kf7 47. Rh6 Ke7 48. g5 a3 49. b4 Rxa2 {
aiming for ...Rg2.} 50. Kb3 Rg2 {...a2 is the strong threat.} 51. Kxa3 Rg3+ 52. Ka4 Rxg5 {Threatens to win with ...Rg4.} 53. Rh7+ Kd6 54. Rxb7 Rg3 55. Rb8 d4 (55... Kc7 $17 56. Rh8 Rg2 )56. Rd8+ $11 Ke5 57. Re8+ $2 {} (57. b5 $11 {and White stays safe.} )Kf4 58. Rf8+ {[#]} Ke3 $2 ({Black should try
} 58... Ke4 $1 $19 {White must now prevent ...Rc3.} 59. Re8+ Kd5 )59. Rf6 d3 60. Kb3 $2 {} (60. Re6+ $11 Kf2 61. Kb3 )Ke2 {Black mates.} 61. Rd6 Ke1 62. Re6+ Kd1 63. Rxc6 d2+ 64. Kc4 {[#]} Kc2 $1 {Weighted Error
Value: White=0.37/Black=0.28} 0-1

[Event "Airthings Masters Preliminary"]
[White "Vachier-Lagrave,Maxime"]
[Black "Nakamura,Hikaru"]
[Site "Online"]
[Round "2.1"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2736"]
[PlyCount "96"]

1. e4 {} e5 2. Nf3 Nc6 3. Bc4 Bc5 4. 0-0 Nf6 5. d3 d6 6. c3 h6 {
6...h6 is a critical line.} 7. Re1 0-0 {C54: Giuoco Piano: 4 c3 Nf6, main
lines with 5 d4 and 5 d3.} 8. Nbd2 a5 9. Nf1 Be6 10. Bb5 Ne7 11. d4 exd4 12. cxd4 Bb6 13. Ng3 d5 14. e5 Ne4 15. Bd3 Nxg3 16. hxg3 Bg4 17. Bc2 c5 18. dxc5 Bxc5 19. Be3 Rc8 20. Bxc5 Rxc5 21. Qd2 Qc7 22. Bd3 Nc6 23. Qe3 Nb4 24. Nd4 Nxd3 25. Qxd3 Qb6 {[#]} 26. f3 $146 ({Predecessor:} 26. b3 Rfc8 27. Kh2 Qb4 28. Qe3 Rc3 29. Qf4 Bd7 30. Red1 a4 31. Ne2 Qxf4 32. Nxf4 {1/2-1/2 (76) Vachier
Lagrave,M (2784)-Nakamura,H (2736) chess24.com INT 2020} )Bd7 27. Qd2 a4 28. Kh2 Rfc8 29. Rad1 Rc4 30. g4 Re8 31. b3 axb3 32. axb3 Rc5 33. Qf4 Qc7 {
Threatening ...f6.} 34. Rd3 (34. Qg3 {seems wilder.} Ra8 35. Ne2 Re8 36. f4 Rc2 37. Rd3 )Rc3 35. Rxc3 Qxc3 36. Rc1 Qa5 37. g5 hxg5 38. Qxg5 Qb6 39. Rd1 Qc7 40. f4 Ra8 41. Rd3 $40 { [#] Strongly threatening Rg3. White is
up to no good.} Ra6 $1 { ...Rg6 is the strong threat.} 42. e6 Bxe6 43. Rg3 {} g6 44. Qh4 Bd7 45. Nf3 Bf5 46. Nd4 Bd7 47. Nf3 Bf5 48. Nd4 Bd7 {Weighted Error Value: White=0.06/Black=0.06} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Nepomniachtchi,Ian"]
[Black "Grischuk,Alexander"]
[Site "Online"]
[Round "2.2"]
[Annotator "TA"]
[Result "0-1"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2777"]
[PlyCount "118"]

1. e4 {} e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. 0-0 0-0 7. Re1 {is now more promising
than 7.Bb3.} a5 {C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} 8. h3 Ba7 $5 { [#] An interesting side line.} 9. Na3 $146 ({
Predecessor:} 9. Bb3 h6 10. Nbd2 Be6 11. Bc2 Re8 12. Nf1 d5 13. exd5 Bxd5 14. Ng3 Qd6 15. Nf5 {1-0 (51) So,W (2770)-Grischuk,A (2777) chess.com INT 2020} )h6 {The position is equal.} 10. Nb5 Bb6 11. Be3 Bxe3 12. Rxe3 Re8 13. d4 (13. Qc2 $11 )exd4 $15 14. cxd4 Rxe4 15. Rxe4 Nxe4 16. Qb3 Qd7 17. Re1 Nf6 18. Qe3 Qd8 (18... Nb4 $17 {And now ...Nc2 would win.} 19. Qe7 Qxe7 20. Rxe7 Bd7 )19. a3 Bd7 ({Better is} 19... Bf5 $15 )20. d5 (20. Qb3 $11 )Ne5 (20... Nb8 {seems wilder.} 21. Nc3 Na6 22. Nd4 Qf8 23. Qd2 Nc5 )21. Nxe5 dxe5 22. Nc3 Qf8 23. Qg3 (23. Qxe5 $2 Re8 $19 )(23. Bf1 $1 $11 )Qc5 $17 24. Bd3 Qb6 25. Rxe5 ({Don't go for} 25. Qxe5 $2 Re8 $19 )(25. Nd1 $142 )Qxb2 { [#] Double Attack} 26. Ne4 Nxe4 27. Bxe4 Qc1+ 28. Kh2 Qc5 29. d6 Qxd6 30. Bxb7 Rb8 31. Bf3 Rb5 ({Of course not} 31... Qxa3 $6 32. Rd5 $11 )32. Re3 Kf8 33. Rc3 Rc5 $36 { Black is on the roll.} 34. Rxc5 Qxc5 35. Qh4 (35. Be4 $17 {was worth a try.} )Qxa3 $19 36. Qd8+ Be8 {Hoping for ..
.Qd6+.} 37. Qxc7 a4 38. Bd5 Qe7 39. Qb8 {intending Bc6.} Qc5 40. Qd8 g5 ({
Weaker is} 40... Qxf2 41. Qd6+ Kg8 42. Qb8 $17 )41. f4 $2 {[#]} (41. Kg1 )gxf4 42. Bf3 Qe5 43. Qc8 Kg7 44. Qg4+ Qg5 (44... Kh7 $142 45. Qc8 a3 )45. Qc8 Qe5 (45... Qg3+ 46. Kh1 Qe1+ 47. Kh2 Qe5 )46. Qg4+ $1 Kf6 47. Qc8 Ke7 48. Qa6 Qd6 49. Qe2+ Kf8 50. Qb2 (50. Qc4 $142 )a3 51. Qc3 Bd7 52. h4 Ke7 53. Qa5 Be6 54. Qa7+ Kf8 55. Qa8+ Kg7 56. Qa5 a2 {Black mates.} 57. Qc3+ f6 58. Qa5 Qe5 59. Qa7+ Bf7 {Weighted Error Value: White=0.38/Black=0.40} 0-1

[Event "Airthings Masters Preliminary"]
[White "Aronian,Levon"]
[Black "Giri,Anish"]
[Site "Online"]
[Round "2.3"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2781"]
[BlackElo "2764"]
[PlyCount "79"]

1. e4 {} c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bc4 e6 7. Be3 b5 8. Bb3 Be7 9. a3 0-0 10. Qe2 Bb7 11. f3 {B87: Sicilian Scheveningen/Najdorf: 6 Bc4, with
early ...b5.} Nc6 12. 0-0-0 Na5 {[#]} 13. h4 $146 {The position is equal.} ({
Predecessor:} 13. g4 Rc8 14. g5 Nd7 15. Rhg1 g6 16. Bxe6 Rxc3 17. bxc3 fxe6 18. Nxe6 Qc8 19. Bd4 {0-1 (35) Brongers,H (2056)-Filipenko,A (2250) Bucharest 2019} )Rc8 14. Kb1 {[#]} Rxc3 $1 15. bxc3 Qc7 ({Better is} 15... d5 $1 $17 )16. g4 Nd7 { Black has compensation.} 17. g5 Ne5 (17... Nc4 $15 )18. h5 Nec4 (18... Nac4 $1 $11 )19. Bc1 $16 d5 20. g6 Nxa3+ {[#]} (20... Bf6 $16 {
was necessary.} )21. Bxa3 (21. Ka2 $1 $18 {is the precise move to win.
Threatens to win with h6.} N3c4 22. gxf7+ Rxf7 23. h6 )Bxa3 22. gxf7+ Rxf7 23. Rd3 Nxb3 24. cxb3 dxe4 25. fxe4 Qe5 26. b4 {Black must now prevent
Nc2.} Bxe4 {[#] And now ...Qd5! would win.} 27. Nc2 $1 {Re1 is the strong
threat.} Rf5 $1 28. Re1 Bxd3 29. Qxe5 Rxe5 30. Rxe5 $14 { Endgame
KRN-KB} Kf7 { [#]} (30... Bf5 $1 $11 )31. Rc5 $1 $18 g5 32. Rxg5 {
White is clearly winning.} Kf6 33. Rg8 Be4 34. h6 e5 35. Rb8 Kf5 36. Rb6 a5 37. bxa5 Bc5 38. Rxb5 Bg1 39. Kb2 Bd3 40. Rb7 {Weighted Error Value: White=0.12/
Black=0.39} 1-0

[Event "Airthings Masters Preliminary"]
[White "So,Wesley"]
[Black "Carlsen,Magnus"]
[Site "Online"]
[Round "2.4"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2770"]
[BlackElo "2862"]
[PlyCount "64"]

1. d4 {} Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 0-0 6. Be2 e5 7. dxe5 dxe5 8. Qxd8 Rxd8 9. Bg5 Re8 10. Nd5 Nxd5 11. cxd5 c6 12. Bc4 cxd5 13. Bxd5 Nd7 14. Nd2 Nb6 (14... Nc5 {with more complications.} 15. Nc4 Bf8 16. 0-0 Be6 17. Rfd1 Rac8 )15. Bb3 {E92: King's Indian: Classical: 6 Be2 e5: 7
dxe5, 7 Be3 and Petrosian System without 7...Nbd7.} Be6 16. Bxe6 Rxe6 17. Rc1 Rc8 {[#]} 18. Ke2 $146 ({Predecessor:} 18. Rxc8+ Nxc8 {1/2-1/2 (18) Feletar,D 
(2420)-Muse,M (2453) Rabac 2003} )Rec6 19. Rxc6 Rxc6 20. b3 Bf8 21. Be3 Bb4 22. a3 Bxa3 23. Ra1 Bc5 24. Rxa7 Bxe3 25. Kxe3 $14 { Endgame
KRN-KRN} Rc7 26. Nc4 Nxc4+ {The position is equal.} 27. bxc4 Rxc4 28. Rxb7 $11 {KR-KR} Rc3+ 29. Ke2 Rc2+ 30. Ke3 Rc3+ 31. Ke2 Rc2+ 32. Ke3 Rc3+ {Not much
happened in this game.  Weighted Error Value: White=0.04/Black=0.03} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Radjabov,Teimour"]
[Black "Anton Guijarro,David"]
[Site "Online"]
[Round "2.5"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2765"]
[BlackElo "2675"]
[PlyCount "101"]

1. d4 {} Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 d5 5. cxd5 exd5 6. Bg5 h6 7. Bxf6 Qxf6 8. e3 {8.Qa4+ gains popularity.} 0-0 9. Qb3 {D38: Queen's Gambit Declined:
Ragozin Defence (4 Nf3 Bb4).} Qb6 10. Bd3 c6 11. 0-0 {The position is equal.} Nd7 {} 12. Qc2 Qd8 13. a3 Bd6 14. Rfe1 Nf6 {
[#]} 15. Ne5 $146 ({Predecessor:} 15. b4 a6 16. e4 dxe4 17. Nxe4 Nxe4 18. Bxe4 a5 19. bxa5 Qxa5 20. a4 Be6 21. Ne5 {0-1 (31) Sith,J-Pierecker,M Bratislava
1991} )Bxe5 16. dxe5 Ng4 17. f4 d4 {[#]} 18. Rad1 $1 {And now h3 would
win.} Nxh2 {White must now prevent ...Qh4.} (18... Qh4 19. g3 )19. Kxh2 ({
Don't play} 19. Bh7+ Kh8 $15 )(19. Ne2 $14 Qh4 20. Nxd4 (20. Bh7+ $2 Kh8 $19 ))Qh4+ $11 20. Kg1 dxc3 21. bxc3 Bg4 22. Rb1 Rad8 23. Be4 (23. Be2 {
looks sharper.} Rd7 24. Red1 Rfd8 25. Rd4 c5 26. Rxd7 Rxd7 27. Bc4 )Rd7 24. Qf2 Qxf2+ (24... Qe7 {with more complications.} 25. Rb4 h5 26. Qb2 f6 27. exf6 Rxf6 28. Bb1 Rfd6 )25. Kxf2 Rfd8 (25... Rd2+ {is more complex.} 26. Kg3 Bc8 27. a4 Rfd8 28. a5 Kf8 )26. Kg3 Be6 27. a4 b6 28. a5 b5 29. Bxc6 Rc7 30. Bxb5 Rxc3 31. Bf1 g5 32. Rb7 gxf4+ 33. Kxf4 a6 (33... Ra3 $14 )34. Ra1 $1 $16 Rd2 35. Rb6 $1 Rf2+ {[#]} 36. Kg3 (36. Ke4 $1 $16 )Rfc2 (36... Rf5 $11 {
keeps the balance.} )37. Rxa6 (37. Bxa6 $16 Bd5 38. Bf1 (38. Rxh6 Rxg2+ 39. Kf4 Rf2+ 40. Kg3 Rg2+ 41. Kf4 Rf2+ 42. Kg3 Rg2+ $11 ))Rxe3+ $14 38. Kh2 Rxe5 39. Rb6 {Strongly threatening a6.} Bd5 ({Black should play} 39... Ra2 $14 40. Rxa2 Bxa2 )40. a6 $16 { Hoping for Rb5.} Rh5+ {[#]} 41. Kg3 $1 Bxg2 $2 { This costs Black the game.} 42. Bxg2 {
Threatens to win with a7.} Rg5+ 43. Kf3 {a7 is the strong threat.} Rcxg2 $18 {
 Endgame KRR-KRR} (43... Rgxg2 $18 44. a7 (44. Rxh6 Rgf2+ 45. Kg4 Rg2+ 46. Kf5 Rgf2+ 47. Kg5 Rg2+ 48. Kf4 Rgf2+ 49. Kg5 Rg2+ 50. Kf5 Rgf2+ 51. Ke5 Rfe2+ 52. Kd6 Red2+ 53. Ke7 Rc7+ 54. Ke8 Rc8+ 55. Ke7 Rc7+ 56. Ke8 Rc8+ 57. Ke7 Rc7+ $11 )Rgf2+ 45. Kg3 Rg2+ 46. Kf4 Rgf2+ 47. Ke5 Rfe2+ 48. Kd6 Rcd2+ 49. Kc5 Rd8 )44. a7 {White mates.} R2g3+ 45. Ke2 Rg2+ 46. Kd3 R2g3+ 47. Kc4 R5g4+ 48. Kb5 Rb3+ 49. Ka6 Rxb6+ 50. Kxb6 Rb4+ 51. Kc5 {Weighted Error
Value: White=0.10/Black=0.40} 1-0

[Event "Airthings Masters Preliminary"]
[White "Harikrishna,Pentala"]
[Black "Dubov,Daniil"]
[Site "Online"]
[Round "2.6"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2732"]
[BlackElo "2699"]
[PlyCount "77"]

1. e4 {} c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Nf5 d5 7. exd5 Bxf5 8. dxc6 bxc6 9. Qf3 Qd7 10. Bg5 {B33: Sicilian: Pelikan and Sveshnikov Variations.
} Be7 (10... e4 $5 {} 11. Qd1 Qxd1+ 12. Nxd1 Be6 $11 )11. Rd1 Qe6 {
[#] aiming for ...Bg4.} 12. Bc4 $1 Qxc4 13. Qxf5 0-0 {[#]} 14. Bxf6 $146 ({
Much worse is} 14. Qxe5 Rfe8 $17 )({Predecessor:} 14. Rd3 e4 15. Rh3 Rfe8 16. b3 Qc5 17. Qxc5 Bxc5 18. Bxf6 gxf6 19. Ke2 Rad8 20. Rd1 f5 21. Rh5 {1-0 (21)
Terteryants,M (2495)-Khokhlov,I (2485) ICCF corr 1994} )Bxf6 15. Qe4 $1 {
} Qe6 16. 0-0 Rfd8 17. b3 Be7 18. Rxd8+ (18. Qe3 {seems wilder.} f5 19. g3 e4 20. Ne2 Qf6 21. Kg2 )Rxd8 19. Rd1 Rxd1+ 20. Nxd1 f5 21. Qe2 e4 22. g3 g6 23. Ne3 Kg7 24. Qd2 Bf6 25. h4 Kf7 26. Kg2 h5 27. a4 Be5 28. Qa5 Qe7 {The position is equal.} 29. Qa6 Qd7 30. Qc4+ Kg7 $1 31. Kf1 Qd2 32. Qxc6 {
[#] Strongly threatening Qb7+.} Bxg3 33. fxg3 Qxe3 $11 { Endgame
KQ-KQ} 34. Qc7+ Kf6 35. Qd6+ Kf7 36. Qd7+ Kf6 {White must now prevent ...Qf3+.} 37. Qd6+ Kf7 38. Qd7+ Kf6 {And now ...Qf3+ would win.} 39. Qd6+ {An uneventful
encounter.  Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Dubov,Daniil"]
[Black "Vachier-Lagrave,Maxime"]
[Site "Online"]
[Round "3.1"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2699"]
[BlackElo "2784"]
[PlyCount "137"]

1. Nf3 {} Nf6 2. c4 c5 3. Nc3 Nc6 4. d4 cxd4 5. Nxd4 e6 6. g3 Bc5 7. Nb3 Be7 8. Bg2 0-0 {
8...b6 is not played anymore.} 9. Bf4 d6 10. 0-0 h6 {A33: Symmetrical English:
2 Nf3 Nf6 3 d4 cxd4 4 Nxd4 e6 5 Nc3 Nc6.} 11. Qd2 (11. e4 $14 )e5 12. Be3 Be6 13. Nd5 Qd7 14. Rfd1 Rfd8 {[#]} 15. Rac1 $146 ({Predecessor:} 15. Qe1 Ng4 16. Rac1 Bxd5 17. cxd5 Nxe3 18. fxe3 Nb8 19. Qf2 Na6 20. Rf1 {1/2-1/2 (69)
Royal,S (1930)-Ethelontis,A (2187) London 2018} )Rac8 16. Qe1 b6 17. Nxf6+ Bxf6 18. c5 d5 (18... bxc5 $2 19. Nxc5 Qe8 20. Nb7 $18 )({Better is} 18... Ne7 $14 )19. cxb6 $16 Be7 20. bxa7 Bb4 {[#]} 21. Qf1 ({White should try} 21. Nc5 $1 $18 {} Qe7 22. Nxe6 fxe6 23. Qf1 Nxa7 24. a3 )Nxa7 22. Bc5 Qa4 23. Bxb4 Qxb4 24. Qe1 Qxe1+ 25. Rxe1 d4 26. Bb7 Rb8 27. Nc5 Bd5 28. Bxd5 Rxd5 {[#]} 29. Rc2 f5 30. Rec1 e4 31. Ne6 (31. Nb3 $142 )Rd6 32. Nf4 g5 33. Nh5 (33. Ng2 $14 )d3 $11 34. exd3 exd3 35. Rd2 Nc6 36. Rc5 Nd4 37. Kg2 ({Much worse is} 37. Rxd3 Ne2+ 38. Kf1 Rxd3 $17 )Nc2 $36 {
Black is pushing.} 38. Rd5 $2 {} Rxd5 $19 39. Nf6+ Kf7 40. Nxd5 Rxb2 { Endgame And now ...Ne1+ would win. KRN-KRN} 41. Kh3 Kg6 $2 (41... Rb1 $19 {...Ne1 is the strong threat.} 42. g4 (42. Rxd3 g4+ 43. Kg2 Ne1+ {
 Double Attack} 44. Kf1 Nf3+ { Discovered Attack} 45. Rd1 Rxd1+ 46. Ke2 Rxd5 47. Ke3 Ra5 48. Kd3 Ra3+ 49. Kc2 Rxa2+ 50. Kd3 Nxh2 51. Kc3 Rxf2 52. Kc4 f4 53. Kd4 fxg3 54. Ke3 Rf3+ 55. Ke4 g2 56. Kd5 g1=Q 57. Kc6 Qc1+ 58. Kd5 Rd3+ 59. Ke5 Qe3+ 60. Kf5 Rd5# )Rg1 43. gxf5 Ne1 )42. g4 $15 fxg4+ 43. Kg3 Rxa2 {aiming for ...Nb4!} 44. Rxd3 h5 45. Ne3 {[#]} Ra1 $1 46. f3 $1 $11 ({Don't go for} 46. Rd6+ $2 Kf7 $19 )h4+ 47. Kxg4 {The position
is equal.} Rg1+ (47... Ra4+ {seems wilder.} 48. Kh3 Nd4 49. Ng4 Kf5 50. Nf2 Kf4 )48. Kh3 Ne1 49. Rd6+ Kf7 50. Rd1 Kg6 51. Rd6+ Kf7 52. Rd1 Kf6 53. Nc2 Nxf3 {
 Discovered Attack} 54. Rxg1 Nxg1+ {KN-KN} 55. Kg4 Ne2 56. Ne3 Nf4 57. Kf3 Nd3 58. Ke4 Nc5+ 59. Kf3 Kg6 60. Ng4 Ne6 61. Ke4 Nc5+ 62. Kf3 Nd7 63. Ke4 Nf6+ { Double Attack} 64. Kf3 Nxg4 (64... Ng8 {keeps more tension.} 65. Ke4 Kh5 66. Ne5 Nh6 67. Kf3 Nf5 )65. Kxg4 h3 66. Kxh3 Kh5 67. Kg3 g4 68. h3 gxh3 69. Kxh3 {What a bad dream for Black.  Weighted
Error Value: White=0.24/Black=0.21} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Anton Guijarro,David"]
[Black "Harikrishna,Pentala"]
[Site "Online"]
[Round "3.2"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2675"]
[BlackElo "2732"]
[PlyCount "89"]

1. d4 {} d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Be2 Bd6 7. 0-0 0-0 8. Qc2 dxc4 9. Bxc4 b5 10. Be2 a6 {D46: Semi-Slav: 5 e3
Nbd7 6 Bd3, Black avoids the Meran.} 11. Ng5 h6 {Recently 11...Be7 got a lot
of attention.} 12. Nge4 Be7 {[#] White has an edge.} 13. a3 $146 ({Predecessor:
} 13. Rd1 Qc7 14. Bd2 c5 15. dxc5 Nxe4 16. Nxe4 f5 17. Ng3 Qxc5 18. Qb3 Qb6 19. Ba5 {1-0 (19) Khairullin,I (2629)-Kjartansson,G (2484) Jerusalem 2015} )Bb7 14. b4 a5 15. Nxf6+ (15. Rb1 {is more complex.} axb4 16. axb4 Nd5 17. Nc5 Nxc5 18. bxc5 Qc7 19. Bd2 )Nxf6 16. Rb1 axb4 17. axb4 Nd5 18. Nxd5 exd5 19. Bd2 Bd6 20. Ra1 Qe7 21. Qb2 Rfe8 22. Bd3 Qf8 (22... Rxa1 {feels hotter.} 23. Rxa1 h5 24. Re1 Bc8 25. Qc3 Bd7 )23. Rfe1 Rxa1 24. Rxa1 Ra8 25. Ra3 Qb8 26. h3 Rxa3 27. Qxa3 Bc8 28. e4 dxe4 29. Bxe4 Bd7 30. d5 cxd5 31. Bxd5 Qe8 32. Qf3 Be6 33. Qe4 h5 (33... Qc8 {with more complications.} 34. g4 Bf8 35. Be3 Bxd5 36. Qxd5 Qc2 )34. Bxe6 (34. Qe2 {is interesting.} Bh2+ 35. Kxh2 Qb8+ 36. Kg1 Bxd5 37. Qxh5 Qd6 38. Be3 )Qxe6 {The position is equal.} 35. Qxe6 fxe6 $14 { Endgame KB-KB} 36. g4 hxg4 37. hxg4 Kf7 38. Kg2 e5 39. Kf3 Ke6 {[#] Strongly threatening ...Kd5.} 40. Ke4 g6 41. f3 Be7 42. Bc3 Bd6 43. Bd2 Be7 44. Bc3 Bd6 45. Bd2 {Weighted Error Value: White=0.05/Black=0.05} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Carlsen,Magnus"]
[Black "Radjabov,Teimour"]
[Site "Online"]
[Round "3.3"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2862"]
[BlackElo "2765"]
[PlyCount "93"]

1. d4 {
} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 0-0 6. e3 Nbd7 {6...b6 is the
modern continuation.} 7. c5 Nh5 8. Be5 {D37: Queen's Gambit Declined: 5 Bf4.} c6 9. Bd3 g6 10. h4 {Black is slightly better.} Nxe5 {[#]} 11. dxe5 $146 ({
Predecessor:} 11. Nxe5 f6 12. Nxg6 hxg6 13. Bxg6 Ng7 14. Qd2 f5 15. h5 b6 16. cxb6 axb6 17. 0-0-0 {0-1 (34) Haller,P (2205)-Betker,J (2448) ICCF email 2015} )f5 12. b4 b6 13. Na4 bxc5 14. Nxc5 Qb6 15. Rb1 a5 16. a3 axb4 17. axb4 Bxc5 18. bxc5 Qxc5 19. 0-0 Qe7 20. Ra1 Bd7 ({Better is} 20... Rb8 $15 )21. Qb3 $11 Rab8 (21... Rfd8 {is more complex.} 22. Qb7 Rab8 23. Qa7 Qf8 24. Rfb1 Ra8 )22. Qc3 Qb4 23. Qxb4 Rxb4 24. Ra7 Rd8 25. Rc1 Rbb8 26. Nd4 Ra8 27. Rb7 Rab8 28. Ba6 Rxb7 29. Bxb7 Kf7 (29... f4 $11 )30. Kf1 Rb8 {The position is equal.} 31. Bxc6 Rc8 $1 32. Ke2 Bxc6 33. Rxc6 Rxc6 34. Nxc6 { Endgame KN-KN} f4 $1 35. Nd4 h6 36. Kf3 {White wants to play e4.} fxe3 37. Kxe3 g5 38. hxg5 hxg5 39. g3 {Black should prevent Kf3.} g4 40. Kd3 (40. Nb5 {feels hotter.} Kg6 41. Nd6 Kg5 42. Kd4 Ng7 43. Kc5 )Ng7 41. Kc3 Nf5 42. Nxf5 exf5 43. Kd3 $1 Ke7 44. Ke3 Kf7 45. Kd3 Ke7 46. Ke3 Kf7 47. Kd3 {Weighted Error Value: White=0.05/
Black=0.06} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Giri,Anish"]
[Black "So,Wesley"]
[Site "Online"]
[Round "3.4"]
[Annotator "TA"]
[Result "0-1"]
[Date "2020.12.23"]
[WhiteElo "2764"]
[BlackElo "2770"]
[PlyCount "50"]

1. Nf3 {} d5 2. g3 Nf6 3. Bg2 e6 4. 0-0 Be7 5. c4 0-0 6. b3 c5 7. cxd5 Nxd5 8. Nc3 Nc6 9. Bb2 Nxc3 10. Bxc3 Qc7 {A14: English Opening: 1...e6 with b3 by White.} 11. Qb1 {[#]} e5 $5 $146 {
 An interesting novelty.} ({Predecessor:} 11... Rd8 12. Qb2 Bf8 13. d4 b6 14. dxc5 bxc5 15. Ne5 Bb7 16. Rac1 Nxe5 17. Bxe5 Qb6 18. Rc4 Bxg2 19. Kxg2 {
1/2-1/2 (65) Darban,M (2401)-Sandipan,C (2560) Esfahan 2005} )12. e3 f5 {
The position is equal.} 13. Rc1 Be6 14. Qb2 {} Bf6 15. Ne1 Rad8 16. d3 (16. Bxc6 $11 bxc6 17. d3 )Bd5 17. b4 Bxg2 18. Kxg2 cxb4 19. Bxb4 Rf7 20. Bc3 f4 21. exf4 exf4 22. Rab1 ({White should try} 22. d4 )Bxc3 $17 23. Qxc3 (23. Rxc3 {was necessary.} Qd7 24. Nf3 )Qd7 {Hoping for ...Nd4.} 24. Qc5 $2 {[#]} (24. Nf3 {is a better defense.} )Nd4 $19 25. Rc4 f3+ {
Weighted Error Value: White=0.32/Black=0.05} 0-1

[Event "Airthings Masters Preliminary"]
[White "Grischuk,Alexander"]
[Black "Aronian,Levon"]
[Site "Online"]
[Round "3.5"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2777"]
[BlackElo "2781"]
[PlyCount "36"]

1. e4 {} e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. 0-0 0-0 7. Re1 $1 {
 now scores much better than the old 7.Bb3.} a5 {C54: Giuoco Piano: 4
c3 Nf6, main lines with 5 d4 and 5 d3.} 8. Bb3 {[#]} Kh8 $146 ({Predecessor:} 8... h6 9. Nbd2 Be6 10. Ba4 Ng4 11. Re2 f5 12. h3 Nf6 13. Bb3 Bxb3 14. Qxb3+ Kh7 15. exf5 {1-0 (32) Karjakin,S (2752)-Sjugirov,S (2675) chess.com INT 2020} )9. h3 h6 {White is slightly better.} 10. Nbd2 g5 {next ...g4 is good for Black.
} 11. Nf1 g4 12. hxg4 (12. Bxh6 $16 gxf3 13. Qxf3 )Nxg4 $11 13. Be3 Nxe3 {The position is equal.} 14. Nxe3 ({Reject} 14. fxe3 f5 $15 )Qf6 $1 15. Nh2 Qg6 16. Nf3 Qf6 17. Nh2 Qg6 18. Nf3 Qf6 {Weighted Error Value: White=0.16/
Black=0.09} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Nakamura,Hikaru"]
[Black "Nepomniachtchi,Ian"]
[Site "Online"]
[Round "3.6"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2736"]
[BlackElo "2784"]
[PlyCount "79"]

1. e4 {} c5 2. Nf3 d6 3. Bb5+ Nd7 4. c4 (4. Ba4 Ngf6 5. d3 g6 6. 0-0 Bg7 7. c3 0-0 8. Re1 a6 9. d4 b5 10. Bc2 Bb7 11. Nbd2 Rc8 12. Nf1 cxd4 13. cxd4 Qc7 14. Bd3 e5 15. d5 Nc5 16. Bc2 Nh5 17. Be3 {1/2-1/2 (72) Nakamura,H (2736)-Nepomniachtchi,I (2784) chess.com INT 2020} )e5 5. 0-0 g6 {[#]} 6. b4 $146 {B51: Sicilian: Moscow Variation (3 Bb5+)
without 3...Bd7.} ({Predecessor:} 6. d3 Bg7 7. Nc3 Ne7 8. Bg5 f6 9. Bxd7+ Bxd7 10. Be3 0-0 11. Ne1 Nc6 12. Qd2 {0-1 (46) Voigt,G (2174)-Reddmann,H (2275)
Hamburg 2018} )b6 7. bxc5 bxc5 8. d3 {White is better.} Bg7 9. Nc3 Ne7 10. Nd5 0-0 11. Rb1 Nb6 12. Nxe7+ (12. Bg5 {keeps more tension.} f6 13. Bd2 Rb8 14. Rb3 Bd7 15. Qc2 )Qxe7 13. a4 {} Rb8 (13... a6 $5 {} 14. Bc6 Rb8 $11 )14. a5 Na8 15. Bg5 f6 16. Bd2 Nc7 17. Bc6 Bd7 18. Bxd7 (18. Qa4 $14 Rxb1 19. Rxb1 )Qxd7 $11 19. Qc2 Qc6 20. Rxb8 Rxb8 21. Rb1 Rb7 22. Bc3 (22. Rxb7 $14 Qxb7 23. Qa4 )Bh6 (22... Ne6 $11 )23. Qa2 (23. Rxb7 $14 Qxb7 24. Qa4 )Kf8 24. Rb3 Na6 25. Qb1 Rxb3 26. Qxb3 Nb4 27. Ne1 f5 (27... Na6 $11 )28. exf5 $1 $14 gxf5 {[#]} 29. d4 (29. g3 $1 $16 )exd4 $11 30. Bxb4 {And now Ba3 would win.} Qe4 {[#]} 31. Kf1 $1 cxb4 32. Qxb4 Bf4 {White must now prevent ...d3.} 33. Qb8+ { Double Attack} Kg7 {aiming for ...d3.} 34. Qxa7+ Kg6 {...d3 is the strong threat.} 35. Qb8 (35. f3 $14 Qe3 36. g3 )d3 {The position is equal.} 36. Qg8+ Kh6 37. Qf8+ Kg6 (37... Kh5 $5 38. Qf7+ $8 Kh6 39. Qf6+ Kh5 40. Qf7+ Kh6 41. Qf6+ Kh5 42. Qf7+ $11 )38. Qg8+ Kh6 39. Qf8+ Kg6 {( -> ...Qe2+)} (39... Kh5 $5 40. Qf7+ $8 Kh6 41. Qf6+ Kh5 42. Qf7+ Kh6 43. Qf6+ Kh5 44. Qf7+ $11 )40. Qg8+ {Weighted
Error Value: White=0.18/Black=0.17} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Vachier-Lagrave,Maxime"]
[Black "Nepomniachtchi,Ian"]
[Site "Online"]
[Round "4.1"]
[Annotator "TA"]
[Result "0-1"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2784"]
[PlyCount "138"]

1. e4 {} c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bd3 e5 7. Nde2 Nc6 {
B90: Sicilian Najdorf: Unusual White 6th moves, 6 Be3 Ng4 and 6 Be3 e5.} 8. Nd5 Nxd5 9. exd5 Nb4 {The position is equal.} 10. Be4 {Strongly threatening c3.} a5 11. c3 Na6 {[#]} 12. Bc2 $146 ({Predecessor:} 12. 0-0 f5 13. Bc2 Be7 14. f4 0-0 15. Be3 e4 16. Nd4 Nc7 17. Bb3 Bf6 18. a4 {1/2-1/2 (61) Vachier Lagrave,M 
(2784)-Ding,L (2791) chess24.com INT 2020} )g6 13. h4 h5 14. Bg5 Be7 15. Qd2 Nc5 16. c4 Bd7 17. Nc3 Bxg5 18. hxg5 Qb6 19. 0-0-0 Qb4 20. Rh4 a4 (20... b5 $11 {keeps the balance.} )21. Re1 0-0 22. a3 $1 {} Nb3+ (22... Qb6 $14 )23. Bxb3 $16 Qxb3 24. Qc2 (24. c5 $1 $16 dxc5 25. Ne4 Qc4+ 26. Qc3 Qxc3+ 27. bxc3 )Qxc2+ $11 25. Kxc2 Rfc8 26. Kd2 {Black must now prevent Ne4.} Kg7 27. Rc1 Bf5 28. f3 f6 29. gxf6+ Kxf6 30. g4 hxg4 31. fxg4 Kg5 32. Rh2 Bxg4 {} (32... Kxg4 $11 33. Rg1+ Kf3 )33. Ne4+ $18 { Double
Attack} Kf4 34. Kd3 Rh8 35. Rf2+ Bf3 36. Rg1 {Threatening mate with Rg3.} (36. Nxd6 g5 $16 )Rh2 (36... Rh3 $142 37. Rxg6 Rf8 )37. Rxh2 $2 (37. Rxg6 Rxf2 38. Rf6+ (38. Nxf2 e4+ 39. Kd4 Re8 $16 )Kg4 39. Nxf2+ Kg3 40. Ke3 )Bxe4+ { Endgame KRR-KRB} 38. Kd2 Bf5 $2 {} (38... g5 $16 )39. Rf1+ $2 (39. Rh4+ $18 {is the precise move to win.} Kf3 40. Rf1+ Kg3 41. Rh7 )Kg5 $16 40. Rh7 b5 41. c5 (41. cxb5 $6 Rb8 $11 )dxc5 42. Rc7 c4 43. Rb7 Rh8 44. Rxb5 Rh3 45. Rb4 Rd3+ 46. Kc1 c3 $1 47. Rxa4 {Threatens to
win with bxc3.} cxb2+ 48. Kxb2 Rd2+ (48... e4 $1 $14 )49. Kc1 $1 {} Rxd5 50. Rg1+ $1 Kh6 51. Rc4 Rd3 (51... e4 $14 )52. a4 $18 e4 {[#]} 53. Kb2 ({
White should try} 53. Rd1 $1 $16 { And now Rxd3 would win.} Rb3 54. Kc2 )e3 $1 $14 54. Re1 {With the idea a5.} Kg5 $1 55. a5 Rd2+ 56. Kc3 Ra2 $1 57. Kb4 ({Don't play} 57. Rxe3 $6 Rxa5 58. Re8 Ra2 $16 )e2 58. Rc3 (58. Kb3 $11 Rxa5 59. Rxe2 )Kf4 $15 { Black has compensation.} 59. a6 Be4 {...Bf3 is the strong threat.} 60. a7 {[#]} Bf3 $1 61. Rc7 g5 (61... Ke3 $17 {aiming for ...g5.} 62. Rg7 Kf2 63. Rxe2+ Kxe2 64. Rxg6 Rxa7 )62. Kb5 $2 {} (62. Re7 $11 )Kg3 $19 63. Re7 Kf2 64. Rb1 g4 65. Kb6 g3 {Black mates.} 66. Re8 g2 67. Rf8 Ra3 68. Rc1 e1=Q {} 69. Rxf3+ Rxf3 {What a fight!  Weighted Error Value: White=0.30/Black=0.26} ({
Weaker is} 69... Kxf3 70. Rxe1 Ra4 71. Kb7 $11 )0-1

[Event "Airthings Masters Preliminary"]
[White "Aronian,Levon"]
[Black "Nakamura,Hikaru"]
[Site "Online"]
[Round "4.2"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2781"]
[BlackElo "2736"]
[PlyCount "69"]

1. e4 {} e5 2. Nf3 Nc6 3. Bb5 a6 (3... Nf6 4. 0-0 Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 0-0 9. d4 Ne8 10. Re1 d5 11. Bf4 Bd6 12. Bxd6 Nxd6 13. Bd3 Bf5 14. Bxf5 Nxf5 15. c3 Re8 16. Nd2 c6 17. Rxe8+ Qxe8 18. Nf3 f6 19. Qc2 {1/2-1/2 (33) Aronian,
L (2781)-Nakamura,H (2736) chess24.com INT 2020} )4. Ba4 g6 5. c3 Bg7 6. d4 {
C70: Ruy Lopez: 3...a6 4 Ba4, Norwegian and Delayed Schliemann.} b5 7. Bc2 {
seems to push 7.Bb3 aside.} exd4 8. cxd4 {White is slightly better.} d5 9. exd5 Nce7 10. Nc3 Nf6 11. Bg5 0-0 12. 0-0 Nexd5 {[#]} 13. a4 $146 ({Predecessor:} 13. Be4 Be6 14. Ne5 Rc8 15. Qf3 c6 16. Rac1 Qd6 17. Nxd5 Nxd5 18. Bh4 Nb4 19. Qa3 Qxd4 20. Nxc6 Nxc6 {0-1 (20) Shirov,A (2662)-Nakamura,H (2736) Chess.com
INT 2020} )Bb7 14. axb5 Nxc3 15. bxc3 axb5 16. Rb1 Ra3 17. Rb3 Qa8 18. Re1 ({Much weaker is} 18. Rxb5 Ba6 $17 )Bd5 19. Rxa3 Qxa3 20. Qd2 Bxf3 21. gxf3 Nd5 22. Rb1 Qxc3 23. Be4 c6 {The position is equal.} (23... Qxd2 {
seems wilder.} 24. Bxd2 Ne7 25. Rxb5 Bxd4 26. Bf4 c6 )24. Bxd5 Qxd2 25. Bxd2 cxd5 26. Rxb5 Bxd4 27. Rxd5 $11 { Endgame KRB-KRB} Bf6 28. Bg5 Bxg5 29. Rxg5 {KR-KR} Ra8 30. Rd5 Rf8 31. Kg2 Ra8 32. Rd4 Rf8 33. Rd5 Ra8 34. Rd4 Rf8 35. Rd5 {Weighted Error Value: White=0.06/Black=0.04} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "So,Wesley"]
[Black "Grischuk,Alexander"]
[Site "Online"]
[Round "4.3"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2770"]
[BlackElo "2777"]
[PlyCount "75"]

1. e4 {} e5 2. Nf3 Nf6 3. Nxe5 d6 4. Nf3 Nxe4 5. d4 d5 6. Bd3 Bd6 7. 0-0 0-0 8. c4 c6 9. Nc3 Nxc3 10. bxc3 dxc4 11. Bxc4 Bf5 12. Bg5 {C42: Petroff Defence: 3 Nxe5 and
unusual White 3rd moves.} Qa5 13. Nh4 Be6 14. Bxe6 {[#] Bf5 is the strong
threat.} Qxg5 15. Nf3 Qa5 16. Bb3 Nd7 17. Qd3 Nf6 18. Rfe1 Rae8 {The position
is equal.} 19. g3 g6 {[#]} 20. h4 $146 ({Predecessor:} 20. Kg2 Kg7 21. h4 h6 22. Nd2 Qd8 23. Qf3 Bc7 24. Rxe8 Qxe8 25. Rb1 Qe7 26. Bd1 {1/2-1/2 (41)
Ochsner,B (2491)-Papp,G (2589) Denmark 2020} )Kg7 21. Ng5 Qd8 22. Kg2 h6 23. Ne4 Nxe4 24. Rxe4 Rxe4 25. Qxe4 Re8 26. Qf3 Qf6 27. Qxf6+ Kxf6 $11 {
 Endgame KRB-KRB} 28. Kf1 h5 29. Re1 Rxe1+ 30. Kxe1 {KB-KB} c5 31. dxc5 Bxc5 32. a4 a5 33. Ke2 b6 34. Bc4 Bd6 35. Bb5 Bc5 36. Bc4 Bd6 37. Bb5 Bc5 38. Bc4 {An uneventful encounter.  Weighted Error Value: White=0.02/Black=0.01} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Radjabov,Teimour"]
[Black "Giri,Anish"]
[Site "Online"]
[Round "4.4"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2765"]
[BlackElo "2764"]
[PlyCount "72"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 h6 6. Bxf6 Qxf6 7. Qa4+ (7. e3 0-0 8. Rc1 dxc4 9. Bxc4 c5 10. 0-0 cxd4 11. Nxd4 Bd7 12. Ne4 Qe7 13. a3 Ba5 14. Nf3 Bc6 15. Qc2 Nd7 16. Nd4 Bxe4 17. Qxe4 Nf6 18. Qb1 Rfd8 19. Rfd1 Bb6 20. Nf3 Rxd1+ 21. Rxd1 Rd8 22. g3 Rxd1+ 23. Qxd1 {1/2-1/2 (40) Radjabov,T (2765)
-Giri,A (2764) chess24.com INT 2020} )Nc6 8. e3 0-0 {D38: Queen's Gambit
Declined: Ragozin Defence (4 Nf3 Bb4).} 9. Be2 dxc4 10. 0-0 Bd7 11. Bxc4 Bxc3 12. bxc3 Rfd8 {Black wants to play ...Nxd4.} 13. Qa3 Qe7 14. Qb2 Na5 15. Be2 c5 16. Ne5 {[#]} Be8 $146 ({Predecessor:} 16... Rac8 17. Nxd7 Rxd7 18. Rfd1 cxd4 19. cxd4 Rdc7 20. Rac1 Nc4 21. Qb3 Nd6 22. Rxc7 Qxc7 {1/2-1/2 (102) Sjugirov,S
(2657)-Dominguez Perez,L (2762) Budva 2019} )17. Rfd1 Rac8 18. h3 Rc7 19. Bf1 cxd4 (19... b6 {seems wilder.} 20. Rdc1 Kh8 21. Bd3 Nc6 22. Nf3 e5 )20. cxd4 Rdc8 21. Rac1 Rxc1 22. Rxc1 Rxc1 23. Qxc1 Nc6 24. Nd3 Qd6 25. Qc3 b6 26. Be2 Ne7 27. Ne5 f6 28. Nd3 Kf8 29. Nf4 Bd7 30. Qc2 {[#] Threatens to win with Qh7.} e5 31. dxe5 fxe5 32. Nd3 Bf5 33. Qc3 Nc6 34. a3 Bg6 35. Nb4 Ne7 36. Nd3 Nc6 {
Not much happened in this game.  Weighted Error Value: White=0.05/Black=0.04} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Harikrishna,Pentala"]
[Black "Carlsen,Magnus"]
[Site "Online"]
[Round "4.5"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2732"]
[BlackElo "2862"]
[PlyCount "48"]

1. e4 {} c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c4 b4 12. Nc2 a5 13. g3 {B33: Sicilian:
Pelikan and Sveshnikov Variations.} g6 14. Nxf6+ Qxf6 15. Bg2 0-0 16. 0-0 Qe7 $5 { Leaves trodden paths.} (16... Bb7 17. Qd2 Nb8 18. Rfd1 Ra6 19. Qe3 Nd7 20. a3 Rb6 21. axb4 axb4 22. Ra4 b3 23. Ne1 Nc5 24. Ra3 Ra6 25. Rxa6 Bxa6 {
0-1 (85) Harikrishna,P (2719)-Carlsen,M (2863) chess24.com INT 2020} )17. b3 Be6 18. Qd2 {[#]} f6 $146 ({Predecessor:} 18... Rfd8 19. Rad1 f6 20. h4 Kg7 21. Kh2 h6 22. Bh3 Bxh3 23. Kxh3 f5 24. exf5 gxf5 {1/2-1/2 (35) Grigoriants,S 
(2541)-Lenic,L (2645) chess.com INT 2019} )19. Rfd1 Rfd8 20. Qe3 Qa7 {The
position is equal.} 21. Qh6 Qg7 22. Qe3 Qa7 23. Qh6 Qg7 24. Qe3 Qa7 {Weighted
Error Value: White=0.06/Black=0.06} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Dubov,Daniil"]
[Black "Anton Guijarro,David"]
[Site "Online"]
[Round "4.6"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2699"]
[BlackElo "2675"]
[PlyCount "87"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 c6 6. 0-0 b5 7. Ne5 Bb7 8. Nc3 a6 {
E04: Open Catalan: 5 Nf3.} 9. b3 {9.b3 is better than 9.a4.} cxb3 10. axb3 Be7 {The position is equal.} 11. Bb2 0-0 12. Ne4 Nxe4 13. Bxe4 a5 14. Qc2 h6 {[#]} 15. Rfc1 $146 ({Predecessor:} 15. Rfd1 Bb4 16. Rdc1 Bd6 17. Qc3 Qc7 18. Nd3 b4 19. Qd2 Nd7 20. Qe3 Be7 21. h4 {1/2-1/2 (50) Ingersol,H (2427)-Quinones Borda,
J (2204) ICCF email 2015} )Bf6 16. Ng4 Bg5 (16... Bxd4 $2 17. Rd1 $18 )17. f4 f5 {Hoping for ...Be7.} 18. d5 fxe4 19. dxe6 Bf6 (19... Qb6+ $6 20. e3 $16 )(19... h5 $11 )20. Nxf6+ $2 (20. Bxf6 $1 $18 Rxf6 21. Qxe4 (21. Nxf6+ Qxf6 22. Qxe4 Na6 $14 ))gxf6 $14 21. Qxe4 Qe7 22. f5 Na6 {Black is on the
road to losing.} 23. Rxa5 h5 (23... Qg7 $16 {was necessary.} )24. Qf3 $18 {
 White has strong compensation.} Qh7 25. Rd1 $1 {} Rad8 26. Raa1 {Rxd8 is the strong threat.} Qh6 (26... Rxd1+ $16 27. Rxd1 Bc8 28. Qxc6 Qc7 )27. Kf2 {Strongly threatening e7.} Rd5 $2 (27... Qg7 {was worth a
try.} 28. Qxh5 Rd5 )28. Rxd5 cxd5 {[#]} 29. Ra5 $2 ({White has to play} 29. Rxa6 $1 $18 {} Bxa6 30. Qxd5 )d4 $2 {} 30. Qxb7 {
 Double Attack} Qe3+ 31. Kf1 d3 32. Qf3 ({Not} 32. Rxa6 $2 Qxe2+ 33. Kg1 d2 $19 )(32. Qxa6 {leads to mate.} dxe2+ 33. Ke1 Rd8 34. Qd6 Rxd6 35. Bd4 Rxd4 36. Ra8+ Kh7 37. Ra7+ Kh6 38. Rd7 Qd2+ 39. Kf2 e1=Q+ 40. Kf3 Qh1# )Qd2 33. Rxa6 Qxb2 34. Qxd3 { Endgame KQR-KQR. White mates.} Rc8 35. e7 Re8 36. Re6 Kf7 37. Qf3 Qc1+ 38. Kg2 Qh6 39. Qd5 Kg7 40. Qxb5 Kf7 41. Qc4 Rxe7 42. Re4+ Ke8 43. Qg8+ Kd7 44. Rd4+ {Weighted Error Value: White=0.28/
Black=0.63} 1-0

[Event "Airthings Masters Preliminary"]
[White "Anton Guijarro,David"]
[Black "Vachier-Lagrave,Maxime"]
[Site "Online"]
[Round "5.1"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2675"]
[BlackElo "2784"]
[PlyCount "167"]

1. e4 {} c5 2. Nf3 d6 3. Bb5+ Nd7 4. c3 Ngf6 5. Bd3 g6 6. 0-0 {
B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7.} Bg7 7. Re1 0-0 8. Bf1 {White has an edge.} e5 9. d4 exd4 10. cxd4 cxd4 11. Nxd4 Nc5 12. Nc3 Re8 {
 [#]} 13. f3 $146 ({Predecessor:} 13. Bg5 h6 14. Bxf6 Bxf6 15. Ndb5 Be5 16. Nd5 Ne6 17. Rc1 Rf8 18. Qd2 g5 19. g3 {1-0 (31) Colandrea,S (1886)
-Ninov,N (2546) Pierrevert 2007} )a6 14. Bg5 h6 15. Bh4 b5 16. a3 Bb7 17. Rc1 Rc8 18. Bf2 Ncd7 19. Qd2 Ne5 20. Rcd1 Re7 (20... Qc7 $11 {remains equal.} )21. Nc2 $16 Rd7 {White should prevent ...d5.} 22. Nb4 Nc4 23. Bxc4 Rxc4 24. Qe2 Qe8 25. Rd2 Qe6 26. Red1 Rc8 27. Bd4 Re8 28. Qf2 h5 29. Nbd5 (29. Rd3 {looks
sharper.} Rc8 30. h3 Kh7 31. Qd2 Qe7 32. Qe3 )Nxd5 30. Bxg7 ({But not} 30. Nxd5 Bxd5 31. exd5 Qf5 $11 )Kxg7 31. Nxd5 Bxd5 32. Rxd5 Qf6 33. Qd4 Qxd4+ 34. R5xd4 { Endgame KRR-KRR} Rc8 35. h4 Rc2 36. Rxd6 Rxd6 37. Rxd6 {Hoping for b4. KR-KR} a5 38. b3 Rc3 39. Ra6 Rxb3 40. Rxa5 b4 41. axb4 Rxb4 42. Kf2 Rb2+ 43. Kg3 Rc2 44. Ra1 Rb2 45. Rf1 Kf6 46. Rf2 Rb1 {[#]} 47. Kf4 $1 Ra1 48. Rb2 Ra6 49. Rb5 Ra2 50. Rb6+ Kg7 51. g3 Rf2 52. Rb7 Rf1 53. Re7 Kf6 54. Ra7 (54. Rc7 {feels hotter.} Ke6 55. Rc5 Rb1 56. Rd5 Kf6 57. Rd3 )Kg7 55. e5 Re1 56. Ra4 Rb1 57. Re4 Rb3 58. e6 fxe6 59. Rxe6 Rb4+ 60. Re4 Rb3 61. Rd4 (61. Re8 {is more complex.} Rb4+ 62. Ke3 Rb3+ 63. Kf2 Kf6 64. Re2 )Rb5 62. Ke4 Kf6 63. Rd6+ Kg7 64. Rd5 Rb3 65. Kf4 Kh6 66. Rd6 Rb4+ 67. Ke5 Rb3 68. Ke4 Rb4+ 69. Rd4 Rb7 70. f4 Re7+ 71. Kf3 Kg7 72. Rd5 Ra7 73. f5 gxf5 {
The position is equal.} 74. Kf4 Ra4+ 75. Kxf5 Rg4 76. Rd7+ Kg8 77. Rd3 Kg7 78. Rc3 $1 Kg8 79. Kf6 Kh7 80. Re3 Rg6+ 81. Kf5 Rg4 82. Kf6 Rg6+ 83. Kf5 Rg4 84. Kf6 {Weighted Error Value: White=0.06/Black=0.06} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Carlsen,Magnus"]
[Black "Dubov,Daniil"]
[Site "Online"]
[Round "5.2"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2862"]
[BlackElo "2699"]
[PlyCount "115"]

1. e4 {} c5 2. Nf3 Nc6 3. Bb5 g6 4. 0-0 Bg7 5. Bxc6 bxc6 6. Re1 Nh6 7. c3 0-0 8. d4 cxd4 9. cxd4 d5 10. e5 {B31: Sicilian: 2...Nc6 3 Bb5 g6.} f6 11. h3 {Recently 11.e6 got a lot of attention.} fxe5 12. dxe5 $5 { [#] The
position is equal. An interesting side line.} c5 $146 ({Predecessor:} 12... Nf7 13. Nc3 Be6 14. Na4 Bf5 15. Nc5 Qb6 16. Qd4 Nd6 17. Bg5 Nb5 18. Qe3 Rae8 {
1/2-1/2 (51) Garifullina,L (2132)-Buksa,N (2410) St Petersburg 2018} )13. b4 cxb4 14. a3 d4 15. axb4 Bb7 16. Nbd2 a5 17. Rxa5 Rxa5 18. bxa5 Qxa5 19. Nxd4 Nf5 20. N4f3 Qd5 21. Bb2 Bh6 22. e6 Rd8 {} 23. Qe2 Qd3 24. Qxd3 Rxd3 25. Ne4 {Black should prevent Nc5.} Bxe4 26. Rxe4 Bg7 27. Be5 (27. Bxg7 {
seems wilder.} Kxg7 28. Rf4 h6 29. Kh2 Rd5 30. h4 )Bxe5 28. Nxe5 $11 {
 Endgame KRN-KRN} Rd1+ 29. Kh2 Kg7 30. g4 Nd6 31. Re3 g5 32. Kg2 h6 33. Nc6 Kf6 34. Rf3+ Kxe6 35. Re3+ Kf6 36. Nxe7 Nc4 37. Re4 (37. Re2 {looks
sharper.} Rd3 38. Nc6 Rd6 39. Nb4 Ne5 40. Ra2 )Nd6 38. Re2 Rd3 39. Nc6 Nf7 40. Re3 Rd7 41. Ra3 Nh8 42. Nb8 Rb7 43. Ra6+ Kg7 $1 44. Nc6 {Threatening
Nd4.} Ng6 45. Nd4 {White wants to play Nf5+.} Nh4+ 46. Kg3 Rb1 (46... Rb4 $1 $11 47. Nc2 Rc4 48. Ra7+ Kg8 49. Ra8+ Kg7 )47. f4 $16 {aiming for Ne6+.} Rg1+ 48. Kf2 Rg2+ 49. Kf1 {And now Nf5+ would win.} Rd2 50. Ne6+ Kf7 (50... Kh8 $16 {was necessary.} 51. f5 (51. fxg5 Nf3 $16 )Nf3 )51. fxg5 $18 Nf3 $2 (51... hxg5 52. Nxg5+ Kg7 )52. g6+ $1 {White is clearly winning.} ({Not} 52. gxh6 Nh2+ 53. Kg1 Nf3+ 54. Kf1 Nh2+ 55. Kg1 Nf3+ 56. Kf1 $11 )Ke7 {[#]} 53. Ra3 $1 {Black must now prevent g7.} Nh2+ (53... Rd1+ 54. Ke2 )54. Ke1 Rd6 55. Nf4 Kf6 56. Ke2 Rd7 57. Ra6+ Ke5 58. Nh5 {Weighted Error Value: White=0.06/
Black=0.13} 1-0

[Event "Airthings Masters Preliminary"]
[White "Giri,Anish"]
[Black "Harikrishna,Pentala"]
[Site "Online"]
[Round "5.3"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2764"]
[BlackElo "2732"]
[PlyCount "79"]

1. d4 {} d5 2. c4 c6 3. Nc3 Nf6 4. e3 e6 5. Nf3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 Bd6 9. Qc2 {D47: Semi-Slav: Meran System.} Bb7 10. e4 {e5 is the
strong threat.} e5 11. Bg5 {The position is equal.} Qc7 12. 0-0-0 {[#]} a6 $146 ({Predecessor:} 12... b4 13. Na4 0-0 14. dxe5 Nxe5 15. Bxf6 gxf6 16. Nxe5 fxe5 17. Nc5 Bc8 18. Kb1 Rb8 {1-0 (41) Di Benedetto,E (2324)-Alok,S (2187)
Montebelluna 2018} )13. Kb1 0-0-0 14. Rhf1 h6 15. Bh4 g5 {Threatens to win
with ...exd4.} 16. Bg3 c5 (16... exd4 {keeps more tension.} 17. Nxd4 Bxg3 18. hxg3 Nc5 19. Nf5 Kb8 )17. dxe5 Nxe5 18. Bxb5 axb5 {[#]} 19. Rxd6 $1 Qxd6 20. Bxe5 Qe6 21. Ka1 Qc4 {A mistake that costs the game.} 22. Rc1 $18 Bxe4 {[#]} 23. b3 $1 {} Qb4 {[#]} (23... Bxc2 24. bxc4 g4 )(23... g4 24. bxc4 )24. Qb2 $1 (24. Nxe4 Nxe4 25. Kb2 (25. Bxh8 Rxh8 26. Kb2 Re8 $14 )f5 $16 )Bxf3 25. Bxf6 Bxg2 26. Bxh8 Kb7 27. Be5 Bf3 (27... Bc6 $142 28. Qc2 c4 29. bxc4 Qxc4 )28. Qc2 Rd7 29. Qf5 Bc6 30. Nb1 Qe4 31. Qxe4 Bxe4 32. Nc3 ({
Less strong is} 32. Rxc5 Rd1 $16 )Bd3 33. Bg7 h5 34. Bf6 g4 35. Re1 Kc6 36. Re7 Rxe7 37. Bxe7 f5 38. Kb2 f4 39. a3 Bf5 40. Ne2 {Weighted Error Value:
White=0.18/Black=0.46} 1-0

[Event "Airthings Masters Preliminary"]
[White "Grischuk,Alexander"]
[Black "Radjabov,Teimour"]
[Site "Online"]
[Round "5.4"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2777"]
[BlackElo "2765"]
[PlyCount "91"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 0-0 6. a3 {D37: Queen's Gambit
Declined: 5 Bf4.} b6 7. Qc2 $1 { is currently scoring better than 7.e3.
} Bb7 8. Rd1 Nbd7 9. cxd5 exd5 10. e3 c5 11. Bd3 a6 12. a4 Re8 13. 0-0 g6 14. Ne5 Rc8 {[#]} 15. Qe2 $146 ({Predecessor:} 15. Be2 cxd4 16. exd4 Nf8 17. Bf3 Ne6 18. Be3 Bd6 19. Rfe1 Bf8 20. Qb3 Qd6 21. g3 {1/2-1/2 (41) Dreev,A (2670)
-Razuvaev,Y (2585) Reggio Emilia 1996} )c4 ({Black should try} 15... Nh5 $11 16. Bh6 (16. Bxa6 Bxa6 17. Qxa6 cxd4 $11 )cxd4 17. exd4 Nxe5 18. dxe5 Bg5 19. Bxg5 Qxg5 )16. Bb1 Nh5 17. Bh6 Nxe5 $1 18. dxe5 {White wants to play
Be4!} Bc5 $1 19. f4 d4 $1 { Hoping for ...d3.} 20. exd4 ({Don't go
for} 20. Qxc4 $2 dxc3 21. Rxd8 Bxe3+ 22. Kh1 Rexd8 $19 )Bxd4+ 21. Kh1 {
[#] aiming for Be4.} Qh4 $1 {} 22. Qe1 {} Qxe1 23. Rfxe1 Rcd8 24. Bg5 f6 25. exf6 {[#] f7+! is the strong threat.} Nxf6 ({Don't play} 25... Bxf6 $6 26. Rxe8+ Rxe8 27. Ba2 $16 )26. Rxe8+ Rxe8 27. h3 $2 (27. Ba2 $11 {and White stays safe.} )Bxc3 $19 28. bxc3 Ne4 ({Black
should play} 28... Nd5 $19 {And now ...b5 would win.} 29. f5 Nxc3 )29. Bxe4 $11 {The position is equal.} Bxe4 { Endgame KRB-KRB} 30. Rd6 b5 31. axb5 axb5 32. Rb6 Ra8 33. Re6 Bd5 (33... Bd3 {seems wilder.} 34. Rb6 Ra1+ 35. Kh2 Ra2 36. Rb8+ Kf7 )34. Rd6 Be4 35. Rd8+ Rxd8 36. Bxd8 {KB-KB} h5 37. Ba5 Kf7 38. Kg1 Ke6 39. Kf2 Kf5 40. g3 Bc6 41. Ke3 Bg2 42. h4 Ke6 43. Bb4 Kf5 44. Ba5 Ke6 45. Bb4 Kf5 46. Ba5 {Weighted Error Value: White=0.13/Black=0.11} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Nakamura,Hikaru"]
[Black "So,Wesley"]
[Site "Online"]
[Round "5.5"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2736"]
[BlackElo "2770"]
[PlyCount "47"]

1. e4 {} e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. d4 Nd6 6. dxe5 Nxb5 7. a4 Nbd4 8. Nxd4 Nxd4 9. Qxd4 d5 10. exd6 Qxd6 11. Qe4+ Qe6 12. Qd4 Qd6 13. Qe4+ Qe6 14. Qd4 Qd6 {Predecessor:} 15. Qe3+ $146 {C67: Ruy
Lopez: Berlin Defence: 4 0-0 Nxe4.} Be6 16. Nc3 Qc6 17. Nb5 Bc5 18. Qc3 0-0 19. Bf4 Rfc8 20. Nd4 Bxd4 21. Qxd4 Rd8 22. Qb4 a5 23. Qb5 Qxb5 24. axb5 {1/2-1/2 
(32) Wei,Y (2732)-Grischuk,A (2777) Chess.com INT 2020} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Nepomniachtchi,Ian"]
[Black "Aronian,Levon"]
[Site "Online"]
[Round "5.6"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2781"]
[PlyCount "102"]

1. e4 {} e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Nf6 5. Nxc6 bxc6 6. e5 Qe7 7. Qe2 Nd5 8. h4 d6 {C45: Scotch Game.} (8... f6 9. c4 Ba6 10. Rh3 fxe5 11. Bg5 Nf6 12. Re3 d6 13. Qf3 Qd7 14. Nc3 Be7 15. Bd3 0-0 16. Bf5 Qe8 17. Be6+ Kh8 18. Qh3 Bc8 19. 0-0-0 Bxe6 20. Qxe6 h6 21. f4 exf4 {0-1 (30) Nepomniachtchi,I 
(2784)-Aronian,L (2781) Chess.com INT 2020} )9. c4 Nb6 10. exd6 cxd6 $1 {
10...cxd6 is better than 10...Qxe2+.} 11. Nc3 Be6 12. b3 $1 d5 13. cxd5 Nxd5 14. Bb2 Qb4 {[#]} 15. Qc4 $146 ({Predecessor:} 15. Qa6 Rc8 16. Rc1 Bc5 17. Bc4 0-0 18. 0-0 Qb8 19. Bxd5 cxd5 20. Ne2 Bg4 21. Nd4 {1-0 (46) Tukhaev,A (2516)
-Rajesh,V (2351) Mumbai 2017} )Qxc4 16. Bxc4 Bb4 17. Bxd5 Bxd5 18. 0-0-0 Bxc3 19. Bxc3 f6 20. Rd4 Kf7 21. f3 Rhe8 22. Re1 h5 23. Ra4 a6 24. Kd2 Red8 25. Ke3 Be6 26. Rc1 Rd5 27. Bd4 Rad8 28. Rc5 Rxc5 29. Bxc5 $11 {
Endgame KRB-KRB} Rd5 30. Bd4 (30. Bb6 {with more complications.} Bc8 31. Rc4 Bd7 32. Bc7 g5 33. Ra4 )c5 31. Bb2 Rd6 32. Ba3 Rc6 33. Kd3 Bd7 {[#]
Strongly threatening ...Rd6+.} 34. Ra5 Rd6+ 35. Kc3 Bb5 36. Bxc5 Rd5 37. Bd4 {
[#] a4 is the strong threat.} Ke6 38. b4 g5 39. a4 Bf1 40. Rxd5 Kxd5 {KB-KB} 41. g4 hxg4 42. h5 {Hoping for h6.} ({Not} 42. fxg4 $2 gxh4 43. Bg1 Ke4 $19 )Ke6 $1 ({Don't blunder} 42... gxf3 $2 43. h6 $18 )43. fxg4 Be2 44. h6 Kf7 45. h7 Kg7 46. Bxf6+ Kxh7 47. Bxg5 Bxg4 48. b5 axb5 49. axb5 Bf3 (49... Kg6 $11 {keeps the balance.} )50. b6 ({Better is} 50. Kd4 $16 )Kg6 51. b7 Bxb7 {
Weighted Error Value: White=0.06/Black=0.06} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Vachier-Lagrave,Maxime"]
[Black "Aronian,Levon"]
[Site "Online"]
[Round "6.1"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2781"]
[PlyCount "113"]

1. c4 {} Nf6 2. Nc3 e6 3. e4 d5 4. e5 d4 5. exf6 dxc3 6. bxc3 Qxf6 7. Nf3 Nc6 {7...b6 is a critical line. A18: English Opening: Flohr-Mikenas
System (1 c4 Nf6 2 Nc3 e6 3 e4).} 8. d4 e5 9. Bg5 Qg6 {...e4 is the strong
threat.} 10. d5 Nb8 11. h4 h6 12. h5 Qa6 13. Be3 Nd7 14. Bd3 Ba3 15. 0-0 Qd6 16. Nh4 0-0 17. Nf5 Qf6 {[#]} 18. Bc2 $146 ({Predecessor:} 18. Ng3 Qh4 {
1/2-1/2 (20) Anand,V (2782)-Karjakin,S (2760) London 2017} )Re8 19. g4 Bc5 20. Qf3 $1 e4 21. Bxe4 Ne5 22. Qf4 Bxe3 23. fxe3 Qg5 24. Qxg5 hxg5 25. d6 Bxf5 26. Rxf5 c6 27. c5 Nxg4 28. Bf3 Nh6 (28... Ne5 $15 29. Rf1 f6 )29. Rxg5 $11 {And now Kf2 would win.} Rxe3 30. Kf2 Rxc3 31. Rb1 b6 {} (31... f6 $11 32. Rg2 Rxc5 )32. Bxc6 $18 Rd8 {[#]} 33. d7 $2 (33. Re1 $1 $18 {
Strongly threatening d7.} f6 34. Re8+ (34. Bd5+ $2 Kf8 $19 )Rxe8 35. Bxe8 bxc5 {[#]} 36. Bg6 $1 )f6 $1 $11 { The position is equal.} 34. Re1 {aiming for Re8+.} Rc2+ 35. Kf1 {Hoping for Re8+.} Rxd7 $1 36. Bxd7 fxg5 { Endgame KRB-KRN} 37. c6 Kf7 38. Re3 g4 39. Ra3 a5 40. Rb3 Ke7 41. a3 Kd6 (41... Rc5 {with more complications.} 42. Rxb6 Rxh5 43. Rb7 Rc5 44. Bxg4+ Kd6 )42. Rxb6 Nf7 (42... Rc5 {is interesting.} 43. Rb7 Rxh5 44. Be8 Rh3 45. Rxg7 Nf5 )43. Bxg4 Rxc6 44. Rb7 Rc7 45. Rb3 Ne5 46. Be2 g6 47. Rb6+ Kc5 48. Rb5+ Kd4 49. hxg6 (49. h6 {seems wilder.} Rh7 50. Rxa5 Rxh6 51. Kg2 g5 52. Rb5 )Nxg6 50. Rxa5 Nf4 51. Bg4 (51. a4 {feels hotter.} Rc1+ 52. Kf2 Nxe2 )Rc2 52. Ra8 Ra2 53. Rd8+ Ke3 54. Re8+ Kd4 55. Rd8+ Ke3 56. Re8+ Kd4 57. Rd8+ {Weighted Error Value: White=0.07/Black=0.14} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "So,Wesley"]
[Black "Nepomniachtchi,Ian"]
[Site "Online"]
[Round "6.2"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2770"]
[BlackElo "2784"]
[PlyCount "49"]

1. d4 {} Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. e4 Nxc3 6. bxc3 Bg7 7. Nf3 c5 8. Rb1 0-0 9. Be2 cxd4 10. cxd4 Qa5+ 11. Bd2 Qxa2 12. 0-0 Bg4 13. Rxb7 {13.Be3 is the
modern continuation. D85: Exchange Grünfeld: Unusual White 7th moves and lines
with 7 Nf3.} (13. Be3 Nc6 14. d5 Na5 15. Bg5 Qa3 16. Re1 Bxf3 17. Bxf3 Qd6 18. e5 Bxe5 19. Qe2 Bf6 20. Bd2 Qd8 21. d6 Nc6 22. dxe7 Qxe7 23. Qxe7 Nxe7 {
1/2-1/2 (23) So,W (2760)-Nepomniachtchi,I (2767) Jerusalem 2019} )Bxf3 14. Bxf3 {[#] aiming for e5.The position is equal.} Bxd4 15. e5 Na6 {} 16. Rxe7 Rad8 {Hoping for ...Bc5.} 17. e6 fxe6 {[#] White must now prevent ...Bc5.} 18. Qe1 {[#]} Nc5 $146 ({Predecessor:
} 18... Bf6 19. Rxa7 Rxd2 20. Rxa6 Qxa6 21. Qxd2 Qb6 22. g3 Bd4 23. Kg2 Rxf3 24. Kxf3 Qb7+ 25. Ke2 Qe4+ 26. Kd1 Qb1+ 27. Ke2 Qe4+ 28. Kd1 Qb1+ 29. Ke2 Qe4+ {1/2-1/2 (29) So,W (2770)-Vachier Lagrave,M (2784) chess24.com INT 2020} )19. Be3 {Threatens to win with Bxd4.} Nd3 20. Bxd4 Nxe1 21. Rg7+ Kh8 22. Rd7+ Kg8 ({Don't go for} 22... e5 $2 23. Bxe5+ Rf6 24. Bxf6+ Kg8 25. Rxd8+ $18 )23. Rg7+ Kh8 24. Rd7+ Kg8 ({Don't blunder} 24... e5 $2 25. Bxe5+ Rf6 26. Bxf6+ Kg8 27. Rxd8+ $18 )25. Rg7+ {A rather calm draw.  Weighted Error Value: White=0.02/
Black=0.02} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Radjabov,Teimour"]
[Black "Nakamura,Hikaru"]
[Site "Online"]
[Round "6.3"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2765"]
[BlackElo "2736"]
[PlyCount "38"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 0-0 6. e3 Nbd7 7. a3 {D37: Queen's Gambit Declined: 5 Bf4.} c5 8. cxd5 Nxd5 9. Nxd5 {White is
slightly better.} exd5 10. dxc5 Nxc5 11. Be5 Bf5 12. Be2 Bf6 13. Bxf6 Qxf6 14. Qd4 $1 { is recently more successful than 14.Nd4.} Qd6 {With the idea .
..Nb3.} 15. Rd1 Rfd8 {Black wants to play ...Bc2.} 16. Qd2 {[#]} Qf6 $5 $146 {
 An interesting novelty.} ({Predecessor:} 16... Nb3 17. Qc3 Qb6 18. Nd4 Nxd4 19. Qxd4 Qxd4 20. Rxd4 Rac8 21. g4 Rc1+ 22. Rd1 Rxd1+ 23. Bxd1 Be6 24. f4 f5 25. gxf5 Bxf5 26. Bb3 {1/2-1/2 (66) Nepomniachtchi,I (2784)-Nakamura,H 
(2736) chess24.com INT 2020} )17. Qd4 Qd6 18. Qd2 Qf6 19. Qd4 Qd6 {An
uneventful encounter.  Weighted Error Value: White=0.06/Black=0.00} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Harikrishna,Pentala"]
[Black "Grischuk,Alexander"]
[Site "Online"]
[Round "6.4"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2732"]
[BlackElo "2777"]
[PlyCount "112"]

1. e4 {} c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nf6 5. Be2 Nc6 6. Qe3 {B53:
Sicilian: 2...d6: Lines with Qxd4.} g6 7. 0-0 Bg7 8. Rd1 0-0 9. h3 Nd7 10. Nc3 b6 11. Rb1 Bb7 12. Nd5 {[#]} a6 $146 ({Predecessor:} 12... Rc8 13. c4 e6 14. Nc3 Qe7 15. b3 Rfd8 16. Bb2 Nc5 17. Nb5 Bxb2 18. Rxb2 a6 {1/2-1/2 (27)
Harikrishna,P (2732)-Nepomniachtchi,I (2784) Lichess.org INT 2020} )13. c4 Re8 14. b3 e6 15. Nc3 Qb8 (15... Nce5 $14 )16. Ba3 $16 Bf8 17. Qd2 (17. Rb2 $16 )Nc5 $11 18. Bf1 Rd8 19. Qe3 Nd7 20. Rbc1 Nce5 21. Nxe5 dxe5 22. Bxf8 Kxf8 23. Rd2 Qc7 24. Rcd1 Nc5 25. b4 Rxd2 26. Rxd2 Nd7 27. Qd3 Ke7 28. Qg3 Nf6 29. Qg5 Rh8 30. a3 h6 31. Qe3 g5 32. f3 Rb8 33. Kf2 Nd7 34. Na4 Bc6 35. b5 axb5 36. cxb5 {[#] aiming for Qc3.} Ba8 37. Qb3 Nf6 38. Rc2 (38. Be2 {keeps more
tension.} Rd8 39. Rc2 Qd6 40. Nb2 Nd7 41. Nc4 )Qd6 39. Qb4 (39. Ke1 {
is more complex.} Rd8 40. Nb2 Qd4 41. Qb4+ Qxb4+ 42. axb4 Nd7 43. Rc7 )Qxb4 40. axb4 Ne8 41. Bd3 Kd7 42. Rc1 Nd6 {The position is equal.} 43. Nb2 (43. h4 {keeps more tension.} g4 44. h5 Kd8 45. Re1 gxf3 46. gxf3 Bb7 47. Rc1 )Bb7 44. Ra1 Ra8 45. Rxa8 Bxa8 { Endgame KBN-KBN} 46. g4 Bb7 47. Nc4 Nxc4 48. Bxc4 {KB-KB} Ke7 49. Bd3 Bc8 50. Ke3 Kf6 51. Kf2 Kg6 52. Kg3 h5 53. Kf2 Bd7 54. Kg3 Bc8 55. Kf2 Bd7 56. Kg3 Bc8 {Weighted Error Value: White=0.10/
Black=0.09} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Dubov,Daniil"]
[Black "Giri,Anish"]
[Site "Online"]
[Round "6.5"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2699"]
[BlackElo "2764"]
[PlyCount "83"]

1. e4 {} e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. d4 Nd6 6. dxe5 Nxb5 7. a4 Nbd4 {C67: Ruy Lopez: Berlin Defence: 4 0-0 Nxe4.} 8. Nxd4 d5 9. c3 $5 { An interesting side line.} Be7 {The position is
equal.} 10. f4 {[#]} 0-0 $146 ({Predecessor:} 10... f6 11. exf6 Bxf6 12. Nxc6 bxc6 13. Re1+ Kf7 14. Be3 Re8 15. Na3 Bf5 16. Nc2 Qd7 {1/2-1/2 (49)
Hrebenshchykova,Y (2029)-Doluhanova,E (2293) Lutsk 2019} )11. Be3 f6 12. Nxc6 bxc6 13. Nd2 Ba6 14. Rf3 fxe5 15. fxe5 Qd7 16. Nb3 Rxf3 17. Qxf3 Rf8 18. Qg3 Qf5 {( -> ...Qf1+!)} 19. h3 Qc2 {[#]} 20. Bc5 $1 Qxb3 21. Bxe7 Rf7 22. Bc5 $40 { Black is in trouble.} Bc8 { Black cannot hold the game
after this.} ({Avoid the trap} 22... Qxb2 $2 23. Re1 $18 )(22... Qc4 $16 23. Bxa7 Qf4 )23. Qg5 {White wants to mate with Qd8+.} h5 24. Qd8+ { [#]
Double Attack} Kh7 25. Qxc8 Qxb2 26. Rf1 Rxf1+ 27. Kxf1 Qc1+ 28. Kf2 Qd2+ 29. Kg1 Qe1+ 30. Kh2 {Strongly threatening Qf5+.} Qxe5+ 31. Kh1 Qxc3 32. Qf5+ Kg8 33. Bg1 a5 (33... Qc4 {might work better.} 34. Qe6+ Kh7 35. Qf5+ Kg8 36. Qe6+ Kh7 )34. Qxh5 $18 Qc4 35. Qe8+ Kh7 36. Qe5 {White is clearly winning.} c5 37. Qxc7 d4 38. Qxa5 Qc1 {intending ...d3.} 39. Qd8 Qc3 40. a5 {} d3 41. a6 {White threatens a7 and mate.} d2 42. a7 {Weighted
Error Value: White=0.03/Black=0.24} 1-0

[Event "Airthings Masters Preliminary"]
[White "Anton Guijarro,David"]
[Black "Carlsen,Magnus"]
[Site "Online"]
[Round "6.6"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2675"]
[BlackElo "2862"]
[PlyCount "101"]

1. d4 {} Nf6 2. c4 e6 3. Nc3 Bb4 4. e3 0-0 5. Bd2 d5 6. Nf3 b6 7. cxd5 exd5 8. Bd3 {E51: Nimzo-Indian: Rubinstein: 4...0-0 5 Nf3 d5.} Ba6 9. Bxa6 Nxa6 10. 0-0 Re8 11. Rc1 Bf8 12. Ne2 Qc8 {[#]} 13. Qc2 $146 ({Predecessor:} 13. Qa4 c5 14. Ng3 Qb7 15. dxc5 Nxc5 16. Qb5 Rac8 17. Rfd1 a6 18. Qf1 Nfe4 19. Be1 {
1/2-1/2 (30) Aronian,L (2767)-Carlsen,M (2863) Stavanger 2020} )c5 14. dxc5 bxc5 15. Bc3 Ne4 16. Rfd1 Qb7 17. Nf4 Rad8 18. Qa4 Nxc3 19. bxc3 Nc7 $1 20. Rb1 Qa8 {The position is equal.} 21. c4 d4 22. exd4 cxd4 23. h3 (23. Rxd4 $2 Rxd4 24. Nxd4 Qe4 $19 )Ne6 24. Nxe6 Rxe6 25. Qc2 Rg6 {And now ...Qxf3
would win.} 26. Qf5 {next Ng5 is good for White.} h6 27. Rb5 Rf6 28. Qd3 Ra6 29. Rd2 Ra3 30. Qf5 Qc8 31. Qxc8 ({Not} 31. Nxd4 $2 Qxc4 32. Qg4 {[#]} Rxd4 $1 $19 {} )({Wrong is} 31. Rxd4 $2 Qxf5 32. Rxf5 Rxf3 $1 $19 {
} )Rxc8 32. Nxd4 Rxc4 33. Rb8 {Hoping for Nf5.} Rac3 34. Nb5 Rc1+ 35. Kh2 {Black must now prevent Rdd8.} Rc8 {} 36. Rxc8 Rxc8 37. Nxa7 $11 {
 Endgame KRB-KRN} Rc5 38. g4 h5 39. Kg2 hxg4 40. hxg4 g6 41. Rb2 Rc4 42. f3 Ba3 43. Re2 Rc5 44. Kg3 Kg7 45. Kf4 Kf6 46. Ke4 Kg5 47. Rg2 Rc4+ 48. Kd5 Rc5+ 49. Ke4 Rc4+ 50. Kd5 Rc5+ 51. Ke4 {Weighted Error Value: White=0.04/
Black=0.04} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Carlsen,Magnus"]
[Black "Vachier-Lagrave,Maxime"]
[Site "Online"]
[Round "7.1"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2862"]
[BlackElo "2784"]
[PlyCount "82"]

1. Nf3 {} Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. h4 Nxc3 6. dxc3 {A16: English
Opening: 1...Nf6 with ...d5.} (6. bxc3 {looks sharper.} Bg7 7. e3 Nc6 8. h5 Qd5 9. Qa4 )Qxd1+ 7. Kxd1 f6 8. h5 g5 9. e4 e5 {[#]} 10. Nh2 $146 ({
Predecessor:} 10. Be3 Nd7 11. Bc4 Nc5 12. Nd2 Bd7 13. Kc2 b5 14. Be2 a5 15. g4 Bd6 16. f3 {1/2-1/2 (28) Nisipeanu,L (2673)-Sutovsky,E (2689) Austria 2018} )Be6 11. Be2 Nd7 {} 12. Bg4 Kf7 13. Ke2 Nc5 14. Bxe6+ Kxe6 15. f3 Na4 16. Rb1 Be7 17. Bd2 Rhd8 18. Rhd1 Nb6 19. Ng4 Rd7 20. Be3 Rxd1 21. Rxd1 Nc8 22. Nh6 b6 23. Nf5 Nd6 24. g4 Nxf5 25. exf5+ $14 {
 Endgame KRB-KRB} Kf7 26. Rd7 Rc8 27. b4 Ke8 28. Rd1 (28. Rd2 {
seems wilder.} c5 29. b5 c4 30. a4 Rd8 31. Ra2 )Rd8 29. Rxd8+ Kxd8 {KB-KB
} 30. b5 Kd7 31. Kd3 c6 32. Kc4 Kc7 33. a4 Kb7 34. Kd3 h6 35. Ke4 Kc7 36. c4 Bb4 37. Kd3 Kd7 38. Kc2 Kd6 39. Kd3 Kd7 40. Kc2 Kd6 41. Kd3 Kd7 {Weighted
Error Value: White=0.06/Black=0.05} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Giri,Anish"]
[Black "Anton Guijarro,David"]
[Site "Online"]
[Round "7.2"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2764"]
[BlackElo "2675"]
[PlyCount "114"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. g3 dxc4 5. Bg2 c6 6. a4 {
E04: Open Catalan: 5 Nf3.} Bb4+ 7. Bd2 a5 8. Qc2 0-0 (8... Be7 {looks sharper.} 9. Qxc4 b6 10. Nc3 Ba6 11. Qb3 Nbd7 )9. Bxb4 axb4 10. Qxc4 Qa5 11. Qc2 b5 {
} 12. b3 Bb7 {[#]} 13. 0-0 $146 ({Predecessor:} 13. Nbd2 Nbd7 14. Ne5 Nxe5 15. dxe5 Nd5 16. 0-0 Nc3 17. Ne4 bxa4 18. Nxc3 bxc3 19. Rxa4 Qxe5 {
1/2-1/2 (39) Cheparinov,I (2688)-Anton Guijarro,D (2675) Los Cancajos 2020} )Nbd7 14. Nbd2 Qb6 15. Rfc1 Rfc8 16. Qb2 c5 17. axb5 Rxa1 18. Rxa1 {
With the idea Nc4.} Qxb5 19. Nc4 {[#] aiming for Nd6.} Ra8 $1 20. dxc5 Qxc5 (20... Nxc5 {is interesting.} 21. Nfe5 Bxg2 22. Kxg2 Qb8 23. f3 Rxa1 24. Qxa1 Nxb3 25. Qd1 Nc5 )21. Nfe5 (21. Ne1 {seems wilder.} Rxa1 22. Qxa1 Bxg2 23. Kxg2 Qc6+ 24. f3 )Nxe5 {The position is equal.} 22. Rxa8+ Bxa8 23. Qxe5 Qxe5 24. Nxe5 Be4 25. Bxe4 Nxe4 $11 { Endgame KN-KN} 26. Nd3 Nd2 27. Nc1 Ne4 28. Kf1 Kf8 29. Ke1 Nc5 30. Kd2 Ke7 31. Kc2 Kd6 32. Nd3 Nxd3 33. Kxd3 {
KP-KP} Kd5 34. e4+ Kc5 35. e5 Kd5 36. f4 h5 37. h3 f5 38. exf6 gxf6 39. g4 hxg4 40. hxg4 {K3P-K3P} e5 41. g5 {[#] Hoping for g6.} (41. fxe5 {keeps more
tension.} Kxe5 42. Ke3 Kd5 43. Kf4 Ke6 44. Ke4 )exf4 42. gxf6 {KPP-KPP} Ke6 43. Ke4 Kxf6 {( -> ...Kg5)} 44. Kxf4 {KP-KP} Ke6 45. Ke4 Kd6 46. Kd4 Kc6 47. Kc4 Kb7 48. Kxb4 {KP-K} Kb6 49. Kc4 {Threatening mate with Kb4.} Kc6 50. b4 $1 {} Kb6 51. b5 Kb7 52. Kc5 Kc7 53. b6+ $1 Kb7 54. Kb5 Kb8 55. Kc5 Kb7 56. Kb5 Kb8 57. Kc5 Kb7 {Weighted Error Value:
White=0.03/Black=0.03} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Grischuk,Alexander"]
[Black "Dubov,Daniil"]
[Site "Online"]
[Round "7.3"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2777"]
[BlackElo "2699"]
[PlyCount "93"]

1. Nf3 {} Nf6 2. g3 g6 3. c4 b6 4. Bg2 Bb7 5. d4 Bg7 6. 0-0 0-0 7. d5 {The modern move.} Na6 {
A50: Queen's Fianchetto Defence (1 d4 Nf6 2 c4 b6).} 8. Nc3 Nc5 9. Nd4 e5 {
White has an edge.} 10. Nb3 d6 11. e4 Bc8 {[#]} 12. Bg5 $146 ({Predecessor:} 12. h3 Nh5 13. Kh2 Bd7 14. Bf3 Kh8 15. Be3 Nf6 16. Bg2 Ng8 17. Qd2 f5 18. exf5 gxf5 {0-1 (84) Martinovic,S (2504)-Kurnosov,I (2653) Aix les Bains 2011} )h6 13. Bxf6 (13. Be3 $14 )Qxf6 14. Nxc5 bxc5 15. a3 {
} a5 16. Nb5 Qd8 17. a4 (17. b4 $5 )f5 18. exf5 gxf5 19. Qh5 Bd7 20. Rae1 Be8 21. Qe2 h5 22. h4 Qe7 23. Kh2 Bf6 24. Bh3 Bg6 25. Qd2 Qg7 26. b3 Kh8 27. Rg1 Rg8 28. Rg2 Qh7 29. Reg1 Rg7 30. Rf1 Re7 31. Re1 Bg7 32. Rgg1 {[#]} (32. f4 $15 )Bf6 (32... f4 $1 $17 33. Be6 (33. gxf4 Bh6 $17 )Bh6 )33. Rg2 $1 $15 Qg7 34. Rgg1 e4 35. Ref1 Be5 36. f4 $1 {} Bf6 37. Rg2 Qf8 38. Re1 Rg7 39. Re3 Qf7 40. Re1 Qe8 41. Ree2 Re7 42. Re3 Kh7 43. Re1 Qd7 44. Rge2 Qe8 45. Rg2 $1 Qd7 46. Rge2 {[#] Strongly threatening Rxe4!} Qe8 47. Rg2 $1 {Weighted Error Value: White=0.06/Black=0.11} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Nakamura,Hikaru"]
[Black "Harikrishna,Pentala"]
[Site "Online"]
[Round "7.4"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2736"]
[BlackElo "2732"]
[PlyCount "81"]

1. e4 {} c6 2. Nc3 d5 3. Nf3 Bg4 4. h3 Bxf3 5. Qxf3 e6 6. d4 (6. g3 Nf6 7. Bg2 dxe4 8. Nxe4 Nxe4 9. Qxe4 Qd5 10. 0-0 Qxe4 11. Bxe4 a5 12. d4 Nd7 13. c4 Nf6 14. Bf3 Bd6 15. Rd1 0-0 16. Be3 Rfd8 17. Rac1 Be7 18. d5 exd5 19. cxd5 Nxd5 20. Bxd5 cxd5 {1/2-1/2 (33) Nakamura,H 
(2736)-Harikrishna,P (2732) Lichess.org INT 2020} )Nf6 7. Be2 {B11:
Caro-Kann: Two Knights Variation.} dxe4 8. Qe3 Nbd7 9. 0-0 {White has an edge.} Bd6 10. Nxe4 Nxe4 11. Qxe4 Nf6 12. Qf3 Bc7 13. Rd1 {[#]} 0-0 $146 ({
Predecessor:} 13... h5 14. h4 Ng4 15. Bg5 Bh2+ 16. Kh1 f6 17. Be3 Bc7 18. Bc4 Qe7 19. Bf4 0-0-0 20. Bxc7 Qxc7 21. Bxe6+ {1/2-1/2 (62) Liang,A (2589)
-Andreikin,D (2719) Sitges 2018} )14. c3 Qd5 15. g3 Rad8 16. Be3 Rd7 17. Qg2 Qxg2+ 18. Kxg2 Rfd8 19. Bf3 h6 20. a4 Nd5 21. Bd2 a5 22. h4 Nb6 23. Be1 Nd5 24. Rd2 g6 25. Re2 h5 26. Bd2 Bd6 27. Be4 Be7 28. Bc2 Kg7 29. Bb3 Bf6 30. Bg5 Ra8 31. Bc4 Nb6 32. Bb3 Nd5 33. Rd1 Bxg5 34. hxg5 b5 35. Re5 Rb8 36. Ra1 Rdb7 (36... bxa4 {is interesting.} 37. Bxa4 Rc7 38. c4 Ne7 39. b3 Nf5 )37. Re2 bxa4 38. Bxd5 {The position is equal.} cxd5 39. Rxa4 Rxb2 40. Rxb2 Rxb2 41. Rxa5 {
Weighted Error Value: White=0.04/Black=0.04} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Nepomniachtchi,Ian"]
[Black "Radjabov,Teimour"]
[Site "Online"]
[Round "7.5"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2765"]
[PlyCount "149"]

1. e4 {} c5 2. Nf3 Nc6 3. Nc3 e5 4. Bc4 Be7 5. d3 d6 6. Nd2 Nf6 7. Nf1 Bg4 8. f3 Be6 9. Ne3 0-0 10. 0-0 a6 {
B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} 11. a4 Nb4 12. Bd2 d5 {
White has an edge.} 13. exd5 Nbxd5 14. Nexd5 Nxd5 15. Qe2 {[#]} Re8 $146 ({
Predecessor:} 15... Nxc3 16. Bxc3 Bxc4 17. dxc4 f6 18. f4 Bd6 19. fxe5 Bxe5 20. Bxe5 Qe7 21. Rae1 Rae8 {1/2-1/2 (27) Gdanski,J (2492)-Johansson,L (2423)
Sweden 2016} )16. Bxd5 ({Reject} 16. Qxe5 {[#]} Bf6 $1 $15 )Bxd5 17. Qxe5 Bc6 18. Ne4 Bf8 19. Qc3 Qd5 20. b3 f5 21. Ng3 g6 22. Qb2 b5 23. axb5 axb5 24. Rxa8 Bxa8 25. Re1 Rxe1+ 26. Bxe1 Bc6 27. Bf2 c4 28. bxc4 bxc4 29. d4 Qe6 30. c3 f4 31. Nf1 g5 32. Qb8 Qd6 33. Qc8 Qd7 34. Qa6 Bd5 35. h3 Qe6 36. Qa5 Be7 37. Nd2 Kf7 38. Qc7 Qd6 39. Qc8 Qe6 $1 {} 40. Qc7 Qd6 41. Qa5 Qe6 42. Qb5 h5 43. Qb1 {White wants to play Qh7+.} Qg6 44. Qb8 Qd6 45. Qh8 {} Qg6 46. Ne4 { [#] Deflection} (46. Kh1 {keeps more tension.} h4 47. Kh2 Qf5 48. Qb8 Qe6 49. Qb5 )Bxe4 47. fxe4 Qxe4 48. Qxh5+ Ke6 49. Qe8 {aiming for Qg8+.} Qb1+ 50. Kh2 {And now d5+! would win.} Qd3 51. Qg8+ Kd7 52. d5 (52. Qd5+ $14 Ke8 53. h4 )Qe2 $11 {The position is equal.} 53. Bd4 (53. Kg1 {seems wilder.} Qd1+ 54. Kh2 Qe2 )f3 {} 54. Qe6+ $1 Qxe6 55. dxe6+ Kxe6 56. gxf3 { Endgame KB-KB} Kf5 57. Kg2 Bd6 58. Kf2 Bf4 59. Ke2 Bd6 60. Kf2 Bf4 61. Bg7 Kg6 62. Bh8 Kf5 63. Ke2 Bh2 64. Bg7 Bf4 65. Bd4 Bd6 66. Bg7 Bf4 67. Bh8 Bh2 68. Kf1 Bd6 69. Bd4 Bf4 70. Bf2 Be5 71. Be1 Bf6 72. Kf2 Bg7 73. Bd2 Bf6 74. Ke2 Be5 75. Kf2 {Weighted Error
Value: White=0.07/Black=0.04} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Aronian,Levon"]
[Black "So,Wesley"]
[Site "Online"]
[Round "7.6"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2781"]
[BlackElo "2770"]
[PlyCount "64"]

1. e4 {} e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 0-0 9. d4 Bf6 10. Re1 {The
position is equal.} Re8 $1 {10...Re8 is better than 10...Nf5. C67: Ruy Lopez:
Berlin Defence: 4 0-0 Nxe4.} 11. Bf4 Rxe1 12. Qxe1 Ne8 13. c3 d5 14. Bd3 g6 15. Nd2 {} Ng7 16. Nf3 Bf5 17. Bxf5 Nxf5 18. Qe2 c6 19. Re1 Ng7 20. Be5 Bxe5 21. Nxe5 Qd6 22. Qf3 f6 {[#]} 23. Ng4 $146 ({
Predecessor:} 23. Nd3 Re8 24. Rxe8+ Nxe8 25. Qe3 Ng7 26. g3 g5 27. a4 Kf7 28. a5 Qe7 29. Qf3 {1/2-1/2 (49) Grischuk,A (2777)-Giri,A (2764) Chess.com INT 2020
} )Re8 24. Rxe8+ Nxe8 25. g3 h5 26. Qe2 Kf7 27. Ne3 Qe6 28. f3 Nd6 29. Kf2 Qh3 30. Kg1 Qe6 31. Kf2 Qh3 32. Kg1 Qe6 {An uneventful encounter. 
Weighted Error Value: White=0.00/Black=0.00} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Vachier-Lagrave,Maxime"]
[Black "So,Wesley"]
[Site "Online"]
[Round "8.1"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2770"]
[PlyCount "67"]

1. e4 {} e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Be7 6. Re1 b5 7. Bb3 0-0 8. a4 b4 9. a5 d6 10. d3 Be6 11. Bxe6 $1 { is now more promising than 11.Nbd2. C88: Closed Ruy
Lopez: Anti-Marshall Systems.} fxe6 12. Nbd2 Qc8 13. c3 {White has an edge.} Rb8 14. Nc4 {[#]} Rb5 $146 ({Predecessor:} 14... Nd7 15. d4 exd4 16. cxd4 e5 17. dxe5 Ncxe5 18. Nfxe5 Nxe5 19. Nxe5 dxe5 20. Qd5+ Kh8 21. Qxe5 {1-0 (42)
Purgar,I (2094)-Raguz,I (1895) Bol 2014} )15. Bd2 Nd7 16. d4 bxc3 17. bxc3 Qe8 18. dxe5 Ndxe5 19. Ncxe5 Nxe5 20. Nd4 Rb2 21. Nxe6 Nf3+ 22. gxf3 Qg6+ 23. Kh1 Qxe6 24. Rg1 Bf6 25. Be3 Be5 26. Rg2 Qf7 27. Bd4 Qxf3 28. Bxe5 Qxd1+ (28... dxe5 {with more complications.} 29. Qd5+ Qf7 30. Rag1 g6 31. Qc6 Rxf2 32. Qxa6 Rxg2 33. Rxg2 Kg7 )29. Rxd1 {The position is equal.} dxe5 $15 {KRR-KRR} 30. Rd7 Rf7 31. Rd8+ Rf8 32. Rd7 Rf7 33. Rd8+ Rf8 34. Rd7 {Weighted Error Value:
White=0.05/Black=0.07} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Radjabov,Teimour"]
[Black "Aronian,Levon"]
[Site "Online"]
[Round "8.2"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2765"]
[BlackElo "2781"]
[PlyCount "88"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. Bg5 dxc4 6. e4 c5 7. Bxc4 cxd4 8. Nxd4 Bxc3+ 9. bxc3 Qa5 10. Bb5+ Nbd7 11. Bxf6 Qxc3+ 12. Kf1 gxf6 13. h4 {Hoping for Rh3.} Qb4 {D39:
Queen's Gambit Declined: Ragozin Defence with 5 Bg5 dxc4.} 14. Rh3 a6 $1 {
} 15. Be2 Ne5 16. Rb1 Qd6 17. Qd2 Bd7 18. Rxb7 {[#]} Rd8 $146 {
[#] And now ...Bc8 would win.} ({Predecessor:} 18... Bb5 19. Rc3 Rd8 20. Nf3 Qxd2 21. Bxb5+ axb5 22. Nxd2 0-0 23. Nf3 Nxf3 24. Rxf3 Rb8 {1/2-1/2 (38) So,W 
(2808)-Aronian,L (2780) Wijk aan Zee 2017} )19. Qb4 Qxb4 20. Rxb4 a5 21. Rb7 0-0 {...Bc8 is the strong threat.} 22. Ra7 Ba4 23. Nb3 Rc8 24. f4 Ng6 25. f5 exf5 26. exf5 Nf4 27. Rg3+ (27. Rxa5 $14 Nxe2 28. Rxa4 )Kh8 $11 28. Rxa5 Nxe2 29. Kxe2 Rc2+ 30. Kf1 Rc4 31. h5 h6 32. Kg1 Rd8 33. Ra7 Rd1+ 34. Kh2 {
[#] Threatens to win with Ra8+.} Rh4+ 35. Rh3 Rxh3+ 36. Kxh3 Bxb3 ({Black
should try} 36... Bd7 $1 $14 )37. axb3 { Endgame KR-KR} Rd3+ 38. Kg4 Rxb3 39. Rxf7 Rb6 40. Rc7 Kg8 41. Rc8+ Kg7 42. Rc7+ Kg8 $1 43. Rc8+ Kg7 $1 44. Rc7+ Kg8 $1 {Weighted Error Value: White=0.17/Black=0.05} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Harikrishna,Pentala"]
[Black "Nepomniachtchi,Ian"]
[Site "Online"]
[Round "8.3"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2732"]
[BlackElo "2784"]
[PlyCount "73"]

1. e4 {} c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nf6 5. Be2 Nc6 6. Qe3 {B53: Sicilian: 2...d6: Lines with Qxd4.} g6 7. 0-0 Bg7 8. Rd1 {
The position is equal.} 0-0 9. h3 Be6 (9... Nd7 10. Nc3 b6 11. Rb1 Bb7 12. Nd5 Rc8 13. c4 e6 14. Nc3 Qe7 15. b3 Rfd8 16. Bb2 Nc5 17. Nb5 Bxb2 18. Rxb2 a6 {
1/2-1/2 (27) Harikrishna,P (2732)-Nepomniachtchi,I (2784) Lichess.org INT 2020} )10. Nc3 Rc8 11. a3 Qa5 12. Bd2 {[#]} Nd7 $146 ({Predecessor:} 12... Ne5 13. Nxe5 Qxe5 14. Bd3 Nd7 15. Rac1 a6 16. Rb1 Qc5 17. Qe1 Ne5 18. Be3 Qc7 {1/2-1/2
(55) Demchenko,A (2632)-Gabrielian,A (2458) chess.com INT 2020} )13. Rab1 Qc5 14. Qf4 (14. Nd5 $5 )Nd4 15. Nxd4 Bxd4 16. Qh4 Bf6 17. Qg3 Nb6 18. Be3 Qe5 19. Qxe5 (19. f4 {keeps more tension.} Qa5 20. f5 Bc4 21. Bf3 Rc7 22. Qf4 )Bxe5 20. Bd4 Bxd4 21. Rxd4 Rc5 22. Bd3 Rfc8 23. Na4 Nxa4 24. Rxa4 a6 25. c3 a5 26. h4 R8c6 {[#] White must now prevent ...Ba2.} 27. Bf1 Rb6 28. b4 Bd7 29. b5 $1 $16 Bxb5 {[#]} 30. Rd4 {Strongly threatening c4.} Bxf1 31. Rxb6 {
 Endgame KRR-KRB} Ba6 32. Rb3 Rc7 33. a4 Bc4 34. Rb6 Ba6 35. Rb3 Bc4 $1 {} 36. Rb6 Ba6 37. Rb3 {Weighted Error Value: White=0.12/
Black=0.09} (37. c4 $14 )1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Dubov,Daniil"]
[Black "Nakamura,Hikaru"]
[Site "Online"]
[Round "8.4"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2699"]
[BlackElo "2736"]
[PlyCount "43"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 0-0 6. Nc3 dxc4 7. Ne5 c5 8. dxc5 Qxd1+ {The position is equal.} 9. Nxd1 {E06: Closed Catalan: Early deviations.} Bxc5 10. Ne3 c3 11. bxc3 Nbd7 12. Nd3 Rb8 13. Nc4 b6 14. Bf4 Bb7 15. Bxb8 (15. Bxb7 Rxb7 16. Rb1 Nd5 17. Na5 Nxf4 18. Nxb7 Nxd3+ 19. exd3 Be7 20. c4 Rb8 21. c5 Rxb7 22. c6 Rc7 23. cxd7 Rxd7 24. Ke2 g6 25. Rhc1 Bc5 26. a4 Kg7 27. Rc4 a5 28. f4 h5 {1/2-1/2 (44) Dubov,D (2699)-Nakamura,H (2736) chess24.com INT 2020} )Bxg2 16. Bd6 Bxh1 17. Bxf8 Kxf8 18. f3 $1 Bg2 19. Nf4 Bh1 {[#]} 20. Nd3 $146 ({Predecessor:} 20. Kf1 b5 21. Nb2 e5 22. Nfd3 Ba3 23. Nd1 e4 24. N3f2 Bxf3 25. exf3 exf3 26. Rb1 a6 27. Rb3 Bc5 28. c4 bxc4 29. Rxf3 {1-0 (72) Dubov,
D (2699)-Karjakin,S (2752) chess24.com INT 2020} )Bg2 21. Nf4 Bh1 22. Nd3 {A rather calm draw.  Weighted Error Value: White=0.01/Black=0.00} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Anton Guijarro,David"]
[Black "Grischuk,Alexander"]
[Site "Online"]
[Round "8.5"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2675"]
[BlackElo "2777"]
[PlyCount "40"]

1. e4 {} e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 Bc5 6. c3 b5 7. Bb3 d6 8. d4 Bb6 9. a4 {} Rb8 10. a5 {C78: Ruy Lopez: Archangelsk and
Möller Defences.} Ba7 ({Avoid the trap} 10... Bxa5 $2 11. dxe5 (11. d5 Ne7 $18 )dxe5 12. Qxd8+ Kxd8 13. Bd5 $18 (13. Bxf7 Bb6 $16 ))11. h3 Bb7 12. Be3 $1 { d5 is the strong threat. is recently more successful than 12.Re1.} Nxe4 13. d5 Bxe3 14. dxc6 {And now Qd5! would win.} Nxf2 $1 15. Qd5 {[#]} (15. Qe2 $11 Nxh3+ 16. Kh1 Nf2+ 17. Rxf2 Bxf2 18. Qxf2 (18. cxb7 Ba7 $15 )Bxc6 19. Nxe5 $1 { Double Attack} Bxg2+ 20. Kg1 )0-0 $5 $146 {
 An interesting novelty.} ({Predecessor:} 15... Nxh3+ 16. Kh1 Qf6 17. cxb7 Nf4 18. Qc6+ Kd8 19. Nh2 Qg5 20. Na3 Ne2 21. Rf3 Ng3+ 22. Rxg3 Qxg3 23. Bxf7 {1-0 (35) Navara,D (2708)-Ganguly,S (2651) Wijk aan Zee 2011} )16. cxb7 $11 {The position is equal.} Ne4+ 17. Kh2 Bf4+ 18. Kg1 $1 Be3+ 19. Kh2 Bf4+ 20. Kg1 $1 Be3+ {A rather calm draw.  Weighted Error Value: White=0.28/Black=0.09} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Carlsen,Magnus"]
[Black "Giri,Anish"]
[Site "Online"]
[Round "8.6"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2862"]
[BlackElo "2764"]
[PlyCount "84"]

1. d4 {} Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. e3 0-0 6. cxd5 Nxd5 7. Bc4 Nb6 8. Bb3 c5 9. 0-0 {D94: Grünfeld: 4
Nf3 Bg7 5 e3.} Bg4 10. dxc5 {[#] Threatens to win with Qxd8.} N6d7 11. h3 Bxf3 12. Qxf3 Nxc5 13. Rd1 Qc8 14. Nd5 Nc6 15. e4 {[#]} Nxb3 $146 ({Predecessor:} 15... Re8 16. Bg5 Ne6 17. Bh4 Qb8 18. Rac1 Qe5 19. Rxc6 bxc6 20. Nxe7+ Kh8 21. Nxc6 Qxb2 22. e5 Rec8 23. Bf6 Rc7 24. Bxe6 fxe6 25. Nd8 Bxf6 26. Qxa8 Qc2 27. Nf7+ {1-0 (27) Parker,J (2533)-Howell,D (2533) Sunningdale 2008} )16. Qxb3 e6 17. Nc3 a6 18. Be3 b5 19. Rac1 Qb7 20. a4 {} b4 {White must now
prevent ...Na5.} 21. Ne2 Rfd8 22. Rxd8+ $1 Rxd8 23. Qc2 Nd4 24. Nxd4 Bxd4 25. Rd1 {[#]} Rc8 $1 26. Qd2 (26. Qe2 Bxe3 )Bf6 27. f3 (27. Bd4 $15 e5 28. Be3 )b3 (27... Rd8 $17 28. Qe2 Rxd1+ 29. Qxd1 b3 )28. Bd4 $11 {The
position is equal.} Bxd4+ 29. Qxd4 { Endgame KQR-KQR} Qc6 30. a5 (30. h4 {feels hotter.} Qc2 31. Kh2 e5 32. Qd7 h5 33. Rd6 )Qc5 (30... Qc2 {looks sharper.} 31. h4 h6 32. Qd7 g5 33. hxg5 hxg5 34. Qd2 Rc5 )31. Qxc5 Rxc5 {KR-KR} 32. Rd3 Rxa5 33. Rxb3 Rc5 34. Rb8+ Kg7 35. b4 Rc2 36. b5 Rb2 (36... axb5 {is more complex.} 37. Rxb5 Ra2 38. Kh2 Kf6 39. h4 Kg7 )37. b6 a5 38. Ra8 Rxb6 39. Rxa5 Rb1+ 40. Kh2 Rb2 41. Kg3 Re2 42. h4 h5 {Weighted Error Value:
White=0.05/Black=0.06} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Giri,Anish"]
[Black "Vachier-Lagrave,Maxime"]
[Site "Online"]
[Round "9.1"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2764"]
[BlackElo "2784"]
[PlyCount "129"]

1. e4 {} c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Bc4 e6 7. Be3 a6 8. Qe2 Qc7 9. 0-0-0 Na5 10. Bd3 e5 {[#] B89: Sicilian:
Velimirovic Attack.} (10... b5 $11 )11. Nb3 $146 ({Predecessor:} 11. Nf5 Be6 12. Bg5 Nd7 13. Kb1 b5 14. h4 h6 15. Bc1 Nb6 16. h5 Nc6 17. Qf3 Nb4 18. a3 {
1-0 (28) Kupreichik,V (2457)-Senner,P (2195) Bad Woerishofen 1999} )b5 12. Kb1 Be7 {White has an edge.} 13. h3 Be6 14. g4 (14. f4 $14 )b4 $11 15. Na4 Nc4 16. g5 Nd7 17. Nd2 $1 $36 { White has the
initiative.} Nxe3 18. Qxe3 0-0 19. h4 Rfc8 20. b3 Qa5 21. h5 Rc6 22. g6 {
aiming for h6.} Nf6 $2 (22... fxg6 $6 23. hxg6 hxg6 24. Nb2 $16 )({Black
should try} 22... h6 $1 $11 )23. Rdg1 $1 $16 Rac8 (23... h6 {might work better.
} )24. gxf7+ Kxf7 25. Nf3 (25. Qg3 $142 )h6 26. Rg6 Bf8 27. Qe2 Ke8 28. Nd2 Qc7 {} 29. Bc4 (29. Nf1 {is interesting.} Bf7 30. Rg2 Kd8 31. Ne3 Qa5 32. Qf3 )Bxc4 30. Nxc4 Rxc4 31. bxc4 Qc6 { [#] Double
Attack} 32. Rxf6 $1 gxf6 33. Nb2 f5 34. f3 fxe4 35. fxe4 Rc7 36. Rf1 {Strongly
threatening Qg4.} Rg7 37. c5 { Deflection} Qxc5 38. Qxa6 Rc7 39. Qa8+ Rc8 40. Qa4+ Qc6 $1 41. Qb3 Be7 42. Re1 Bg5 43. Nd3 Qc4 44. Qa4+ Kf8 45. Re2 Kg7 $2 {[#] This costs Black the game.} (45... Qc7 $11 {and Black is okay.} )46. Qd7+ $1 $18 { Double Attack} Kg8 {White must now prevent ...Ra8.} 47. Qxd6 { Double Attack} Rf8 (47... Rd8 $142 48. Nxe5 (48. Qxe5 Rxd3 49. Qe8+ Kh7 $11 )Qxa2+ 49. Kxa2 Rxd6 )48. Qd5+ ({Weaker is} 48. Qxe5 Kh7 $18 )Qxd5 49. exd5 { Endgame KRB-KRN} Bf6 50. Re4 Bg7 51. Nxb4 Kf7 52. c4 Kf6 53. c5 Kf5 54. Re1 Rb8 55. a3 e4 56. Kc2 Rb5 57. c6 Rc5+ 58. Kb3 {And now Rf1+ would win.} Rc3+ (58... Be5 $142 59. Na6 Rc3+ 60. Kb4 Rc2 )59. Ka4 Be5 60. Re2 e3 {Black hopes to continue with ...Ke4.} 61. Nc2 Ke4 {[#]} 62. Rxe3+ $1 { White mates.} Rxe3 63. Nxe3 Kxe3 64. Kb5 Kd4 65. Kb6 {
Weighted Error Value: White=0.21/Black=0.35} 1-0

[Event "Airthings Masters Preliminary"]
[White "Grischuk,Alexander"]
[Black "Carlsen,Magnus"]
[Site "Online"]
[Round "9.2"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2777"]
[BlackElo "2862"]
[PlyCount "228"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 0-0 {D38: Queen's Gambit Declined: Ragozin Defence (4 Nf3 Bb4).} 8. e3 Bf5 9. Be2 $1 { now scores much better than the old 9.Qb3.} Nbd7 10. Qb3 Bxc3+ 11. Qxc3 c6 12. Nd2 Ne4 13. Bxd8 Nxc3 14. bxc3 Rfxd8 15. a4 {[#]} Nf6 $146 ({Predecessor:} 15... c5 16. Nf1 Rac8 17. Ng3 Bh7 18. Kd2 Rc7 19. a5 Kf8 20. h4 Nf6 21. Bf3 Ke7 {1-0 (52) Grischuk,A (2772)-Karjakin,S (2752) Moscow
2019} )16. Nf1 Ne8 17. Ng3 Bh7 18. Kd2 Nd6 19. Ra2 a5 20. Rha1 Ra7 21. f3 Rda8 (21... f5 {feels hotter.} 22. Rc1 Kf7 23. c4 f4 24. Nf1 dxc4 25. Bxc4+ Nxc4+ 26. Rxc4 Rd6 )22. Bd3 Bxd3 23. Kxd3 b5 24. axb5 cxb5 25. e4 Nc4 26. Rb1 dxe4+ 27. fxe4 Rb8 28. Nf1 f6 29. Nd2 Nd6 30. Rba1 a4 31. Rb1 Re8 32. Rb4 Rae7 (32... Rb7 {with more complications.} 33. Ra1 Kh7 34. Re1 Rbe7 35. Kc2 Kg6 )33. c4 bxc4+ 34. Nxc4 Nxc4 35. Kxc4 Rxe4 36. Rbxa4 $11 { Endgame KRR-KRR} Kf7 37. Rd2 Rc8+ 38. Kd3 Re7 39. Rc4 Ra8 40. d5 Ra5 41. Rd4 Ra3+ 42. Kc2 Ree3 43. d6 Ke8 44. d7+ Kd8 45. Rg4 Ra2+ 46. Kd1 Rxd2+ 47. Kxd2 $15 {KR-KR} Re7 48. h4 Kxd7 49. g3 Ke6 50. Ra4 (50. h5 $17 )Kf7 (50... Kf5 $1 $19 {is more
deadly.} 51. Kd3 Kg6 )51. h5 $17 Re5 52. g4 f5 ({Better is} 52... Rg5 $17 53. Ke3 f5 54. gxf5 (54. Ra7+ $2 Kg8 $19 )Rxh5 )53. gxf5 $11 Rxf5 54. Rh4 Re5 55. Rh1 Kf6 56. Kd3 Re7 57. Rg1 Ra7 58. Ke3 Ra4 59. Rf1+ Ke5 60. Rg1 Ra3+ 61. Kf2 Kf6 (61... Ra2+ {seems wilder.} 62. Ke3 Ra4 63. Rxg7 Kf5 64. Rf7+ Kg5 )62. Kg2 $2 {} (62. Rh1 $11 )Ra5 $1 $19 63. Rh1 Kg5 $2 (63... Rf5 $1 $19 64. Rh2 Kg5 )64. Kf3 $11 Rf5+ 65. Ke3 Rf4 66. Rg1+ Rg4 67. Rh1 $1 Rh4 68. Rg1+ Kf6 (68... Rg4 {feels hotter.} )69. Rf1+ $1 Ke5 70. Rg1 Rh3+ 71. Ke2 Kf6 72. Rf1+ $1 Ke7 (72... Ke5 {with more complications.} 73. Rg1 )73. Rg1 Kf7 74. Rf1+ $1 Kg8 75. Rf5 Rg3 76. Rf1 Rg5 77. Rh1 $1 Kf7 78. Ke3 Kf6 79. Kf4 Ra5 80. Kf3 (80. Kg3 {looks sharper.} Rf5 81. Rh4 Kg5 82. Rg4+ Kf6 83. Rh4 )Ra4 81. Ke3 Kg5 82. Rg1+ Rg4 83. Rh1 $1 Rg3+ 84. Ke2 Kg4 85. Kf2 Rf3+ (85... Rh3 $5 86. Rg1+ $8 Kh4 $11 )86. Ke2 Rf7 (86... Rg3 {keeps more tension.} )87. Ke3 Ra7 88. Kf2 Re7 89. Rh2 Rf7+ 90. Ke2 Kg3 91. Rh1 Re7+ 92. Kd3 Kg2 93. Rh4 Kf3 94. Rh3+ Kg2 95. Rh4 Ra7 96. Ke2 Ra2+ 97. Ke3 Ra3+ 98. Ke2 Rg3 99. Kd2 Kf3 100. Rh1 Rg5 101. Rh3+ (101. Kd3 $11 {remains equal.} )Kg4 $17 102. Rh1 Rxh5 103. Rg1+ Kf3 104. Rxg7 Re5 $1 105. Rf7+ Kg2 (105... Kg3 $17 {Strongly
threatening ...h5.} 106. Rg7+ Kh3 )106. Rg7+ {[#]} (106. Rh7 $11 )Rg5 (106... Kh3 $1 $17 {...h5 is the strong threat.} 107. Rd7 h5 )107. Rh7 $11 h5 108. Ke3 Kg3 {Threatens to win with ...h4.} 109. Ke2 $1 h4 ({Black should try} 109... Rf5 $11 )110. Kf1 $17 {[#]} h3 (110... Rb5 $1 $17 { aiming
for ...Rb1+.} 111. Rg7+ Kh3 )111. Kg1 $11 {The position is equal.} Rg4 112. Kh1 h2 113. Rxh2 Rh4 (113... Rc4 $5 114. Rg2+ $8 Kh3 $11 )114. Rxh4 Kxh4 {Weighted
Error Value: White=0.08/Black=0.08} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Nakamura,Hikaru"]
[Black "Anton Guijarro,David"]
[Site "Online"]
[Round "9.3"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2736"]
[BlackElo "2675"]
[PlyCount "63"]

1. d4 {} Nf6 2. c4 e6 3. g3 d5 4. Nf3 dxc4 5. Bg2 c6 6. a4 {E04: Open Catalan: 5 Nf3.
} Bb4+ 7. Bd2 a5 8. Qc1 $5 { The position is equal. Exploring less
charted territory.} 0-0 {[#]} 9. Qxc4 $146 ({Predecessor:} 9. Bxb4 axb4 10. Qxc4 Qa5 11. Qc2 b5 12. b3 Bb7 13. Nbd2 Nbd7 14. Ne5 Nxe5 15. dxe5 {1/2-1/2 
(39) Cheparinov,I (2688)-Anton Guijarro,D (2675) Los Cancajos 2020} )Bxd2+ 10. Nbxd2 {} b6 11. Qb3 Ba6 12. Nc4 Nbd7 13. Nfe5 Rc8 14. Nd6 Nxe5 (14... Rc7 $1 $11 {remains equal.} )15. dxe5 $16 Rb8 16. Bxc6 Nd7 17. Qe3 $36 { White is really pushing.} Nxe5 $2 { A mistake that costs the game.} (17... Nc5 $16 18. f4 Bb7 19. Nxb7 Nxb7 )18. Qxe5 $18 Qc7 19. Bf3 Rbd8 20. Rd1 Rd7 {intending ...Rfd8.} 21. 0-0 Rfd8 {
 [#]} 22. Nxf7 Qxe5 23. Rxd7 Qxb2 24. Nxd8 Bxe2 25. Bxe2 Qxe2 26. Rd6 h5 27. Nxe6 h4 28. Ng5 (28. Rc1 $142 Qg4 29. Rc7 hxg3 30. hxg3 Kh8 31. Rxg7 Qxe6 { Remove Defender} 32. Rxe6 Kxg7 33. Rxb6 )g6 29. Rxb6 Kg7 30. Ne6+ Kf7 31. Nf4 (31. Rc1 $142 Qa2 32. gxh4 Kf6 33. Rc5 Ke7 34. Rxa5 Qa3 35. Kg2 Qd3 36. Ra7+ Qd7 37. Rxd7+ Kxd7 38. a5 )Qf3 32. Rc1 {Weighted
Error Value: White=0.05/Black=0.98} 1-0

[Event "Airthings Masters Preliminary"]
[White "Nepomniachtchi,Ian"]
[Black "Dubov,Daniil"]
[Site "Online"]
[Round "9.4"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2699"]
[PlyCount "75"]

1. d4 {} Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Be2 0-0 6. Be3 Nc6 {
} 7. d5 Ne5 {E73: King's Indian: Averbakh Variation without 6...c5.} 8. f4 Neg4 9. Bd2 Nh6 {White is slightly better.} 10. h3 {Threatening g4.} e6 $1 11. dxe6 {[#]} Bxe6 $146 ({Predecessor:} 11... fxe6 12. g4 b5 13. cxb5 Bb7 14. Qc2 d5 15. 0-0-0 d4 16. Be3 dxc3 17. Rxd8 Raxd8 18. Qxc3 Nfxg4 {1/2-1/2 
(52) Santos Latasa,J (2575)-Guseinov,G (2665) ICC INT 2020} )12. g4 Re8 13. Nf3 ({Much weaker is} 13. g5 Nxe4 14. Nxe4 Nf5 $15 )Bd7 $1 14. g5 Nxe4 15. gxh6 (15. Nxe4 {with more complications.} Rxe4 16. gxh6 Bxh6 17. f5 Qf8 18. 0-0 )Bxh6 (15... Ng3 {is interesting.} 16. Rh2 Bxh6 17. Rg2 Nf5 18. Qb3 a5 )16. Nxe4 Rxe4 17. f5 Qf8 18. 0-0 Rae8 19. Bd3 Re3 20. Bxe3 Bxe3+ 21. Kg2 {
Qe1 is the strong threat.} Bc6 $1 22. Qe1 (22. b4 $11 b6 23. b5 )g5 (22... Qg7 $1 $15 23. fxg6 hxg6 )23. Qg3 $1 $11 Bf4 24. Qg4 {And now Rfe1 would
win.} Re3 25. Rad1 {aiming for b4.} Qg7 (25... Qe8 $11 {keeps the balance.} )26. Rf2 ({White should try} 26. f6 $16 Qxf6 27. Rf2 )Qh8 {[#]} (26... f6 $1 $14 )27. Qh5 $1 $16 Qg7 (27... h6 $16 28. Kf1 b6 )28. Kf1 Bg3 29. f6 $1 {
} Qxf6 30. Qxg5+ Qxg5 31. Nxg5 { Discovered Attack} h6 32. Nxf7 Kg7 {[#]} 33. Nd8 $1 Bxf2 34. Kxf2 Rf3+ (34... Rxh3 {was worth a try.} 35. Rg1+ Kf8 )35. Ke2 $18 Rxh3 {Threatens to win with ...Bf3+.} 36. Rf1 Rh2+ 37. Ke3 {Threatening mate with Ne6+.} Rxb2 $2 (37... Rh3+ $18 38. Kd4 Rf3 39. Rg1+ Kf6 40. Nxc6 bxc6 41. Rg6+ Ke7 42. Rxh6 c5+ 43. Ke4 Rf7 )38. Ne6+ {
Double Attack.  Weighted Error Value: White=0.10/Black=0.48} 1-0

[Event "Airthings Masters Preliminary"]
[White "Aronian,Levon"]
[Black "Harikrishna,Pentala"]
[Site "Online"]
[Round "9.5"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2781"]
[BlackElo "2732"]
[PlyCount "164"]

1. d4 {} d5 2. c4 dxc4 3. e3 Nf6 4. Bxc4 e6 5. Nf3 a6 6. 0-0 b5 7. Be2 Bb7 {D26: Queen's Gambit Accepted: 4 e3 e6 5 Bxc5 c5
sidelines.} 8. a4 b4 9. b3 Nbd7 10. Bb2 Be7 11. Nbd2 0-0 12. Rc1 c5 13. dxc5 Bxc5 14. Ne5 Rc8 15. Nxd7 {[#]} Qxd7 $146 ({Predecessor:} 15... Nxd7 16. Bf3 Qc7 17. Bxb7 Qxb7 18. Qg4 e5 19. Nc4 Rfe8 20. Rfd1 Re6 21. Qf3 e4 {1-0 (38)
Dedebas,E (2319)-Badelka,O (2384) Skopje 2019} )16. Bxf6 gxf6 17. Nc4 (17. Ne4 $5 Qxd1 18. Nxf6+ Kg7 19. Nh5+ (19. Rcxd1 $2 {loses.} Kxf6 20. Rd7 Bc6 $19 )Kh6 20. Rfxd1 $14 (20. Rcxd1 Rfd8 $14 ))Qxd1 18. Rfxd1 Bd5 19. Bf3 Bxc4 20. Rxc4 {[#] aiming for Rdc1.} Be7 {Threatening ...Rxc4.} 21. Be2 Rxc4 22. Bxc4 $14 { Endgame KRB-KRB} Ra8 23. g4 Ra7 24. f4 a5 25. Kf2 Rc7 26. f5 exf5 27. gxf5 Kf8 28. Kf3 Kg7 29. e4 Kf8 (29... Bc5 $14 )30. Rd5 $16 Ra7 31. Kg4 Kg7 32. Kh5 Bf8 33. Kg4 Be7 34. Kf3 Kf8 $1 35. Ke2 Kg7 36. Kd3 Kh6 37. Ke3 Kg5 38. Kf3 Kh6 39. Ke3 Kg5 40. Rd2 Kh6 41. Rg2 Rd7 42. Kf3 Bc5 43. Bd5 Bb6 44. Rg8 Rd8 45. Rxd8 Bxd8 46. Bxf7 $14 {KB-KB} Kg5 47. Bg8 h5 48. Bf7 Bc7 49. h3 h4 50. Ke3 Bb6+ $1 51. Kd3 Kf4 52. Bh5 Ke5 53. Bf3 Kf4 54. Bh5 Ke5 55. Bf3 Kf4 56. Bg2 Kg3 57. Bf1 Kf4 58. Be2 Ke5 59. Bh5 Bc7 60. Ke3 Bb6+ 61. Kf3 Bd4 62. Bf7 Bc3 63. Bd5 Kd6 64. Kg4 Be1 $1 65. Kh5 Bg3 66. Kg6 Ke7 67. Be6 Be5 68. Kh5 Bg3 69. e5 fxe5 70. Kg5 e4 71. Bc4 e3 72. f6+ Kf8 {The position is equal.} 73. Kf5 Bc7 74. Ke6 Bd8 75. f7 Bb6 76. Be2 Bd8 77. Kd7 Bg5 78. Ke6 Bd8 79. Bh5 Bg5 80. Kd7 e2 81. Bxe2 Kxf7 82. Bc4+ Kf8 {Weighted Error Value: White=0.09/
Black=0.03} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "So,Wesley"]
[Black "Radjabov,Teimour"]
[Site "Online"]
[Round "9.6"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2770"]
[BlackElo "2765"]
[PlyCount "38"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 0-0 6. e3 Nbd7 7. a3 {D37: Queen's Gambit Declined: 5 Bf4.} c5 8. cxd5 Nxd5 9. Nxd5 {White
has an edge.} exd5 10. dxc5 Nxc5 11. Be5 Bf5 12. Be2 Bf6 13. Bxf6 Qxf6 14. Qd4 $1 { is recently more successful than 14.Nd4.} Qd6 {Threatening ...Nb3.
} 15. Rd1 Rfd8 {With the idea ...Bc2.} 16. Qd2 {[#]} Qf6 $5 $146 { An
interesting novelty.} ({Predecessor:} 16... Nb3 17. Qc3 Qb6 18. Nd4 Nxd4 19. Qxd4 Qxd4 20. Rxd4 Rac8 21. g4 Rc1+ 22. Rd1 Rxd1+ 23. Bxd1 Be6 24. f4 f5 25. gxf5 Bxf5 26. Bb3 {1/2-1/2 (66) Nepomniachtchi,I (2784)-Nakamura,H (2736)
chess24.com INT 2020} )17. Qd4 Qd6 18. Qd2 Qf6 19. Qd4 Qd6 {A rather calm draw.
Weighted Error Value: White=0.05/Black=0.00} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Vachier-Lagrave,Maxime"]
[Black "Radjabov,Teimour"]
[Site "Online"]
[Round "10.1"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2765"]
[PlyCount "119"]

1. e4 {} c5 2. Nf3 Nc6 3. Bb5 e6 4. b3 d6 5. Bxc6+ bxc6 6. e5 Ne7 7. exd6 Ng6 8. Na3 {White is slightly
better.} Bxd6 9. d3 0-0 10. 0-0 f6 11. Nc4 Bc7 12. Ba3 Qd5 13. d4 (13. Ne3 $16 Qh5 14. g3 )Rd8 $11 {} 14. Bxc5 e5 15. Re1 Nf4 16. Ne3 Qf7 17. Nh4 Be6 (17... f5 $1 $17 )18. Qf3 exd4 19. Nef5 Be5 20. Ne7+ ({Reject} 20. Qxc6 d3 $17 )(20. Rad1 $11 )Kh8 $15 21. Nxc6 { Double Attack} Bd5 (21... Qc7 $5 {} 22. c4 (22. Nxd8 Rxd8 23. Bxd4 Bxd4 $19 )dxc3 23. Nxe5 fxe5 24. Qxc3 Nd3 $17 { Double Attack} )22. Nxd8 Rxd8 23. Qg4 h5 24. Qxf4 Bxf4 $17 25. Re7 { [#] Double Attack} Bxh2+ $1 26. Kxh2 Qg8 27. Rae1 (27. Bxd4 $17 Bc6 28. c3 )Qh7 $1 $19 28. Bxd4 Qxc2 29. R1e2 Qd3 ({Black should try} 29... Qc8 $19 {Strongly threatening ...Qg4.} 30. f3 Qb8+ 31. Kg1 Bg8 )30. Bxa7 $17 Bc6 31. R2e3 $2 {} (31. R2e6 $17 {
nothing else works.} Bd7 32. Re4 Qd6+ 33. Kg1 )Qd6+ $19 32. Rg3 Rg8 (32... g5 33. Nf5 Qf4 )33. Be3 $2 (33. Ng6+ Kh7 34. Ree3 )g6 34. Ra7 Be4 $2 (34... g5 $1 $19 {} 35. Nf5 Qe5 )35. f4 $2 (35. Ra4 $1 $15 Bb1 36. f4 )Rg7 $2 ({Black should play} 35... g5 $1 $19 {} 36. Ra4 gxf4 37. Rxg8+ Kxg8 )36. Ra4 $15 Qe6 { Black has compensation.} 37. Bd4 Kh7 38. Ra5 (38. Nf3 $15 )Qd6 $1 $17 {} 39. Be3 {[#]} Qe6 (39... Qb8 $1 $17 40. Ra4 Bb1 )40. Rc5 (40. Bd4 $1 $11 )Qd6 (40... Bd3 $17 41. Ra5 Qd6 )41. b4 (41. Ra5 $1 $11 {keeps the balance.} )Rd7 42. a4 Qd1 $36 { aiming for ...Qb1. Black is in control.} 43. Rc4 Qb1 44. Bc1 $2 ({Better is} 44. Rd4 $1 $15 Rxd4 45. Bxd4 )Bc2 45. Rgc3 Bxa4 ({Weaker is} 45... Qxc1 46. Rxc2 Qa1 47. a5 $15 )46. Rc8 Qxb4 47. R3c4 Qb5 48. f5 $2 (48. R4c5 Qd3 49. Nf3 )g5 $19 49. Ng6 {intending Nf8+.} Qxf5 50. Nf8+ Kg7 51. Nxd7 Bxd7 52. R8c5 Qe6 53. Rd4 Kg6 $2 (53... Bc6 $19 {and Black
stays clearly on top.} 54. Bb2 g4 55. Rxh5 Qe2 56. Rg5+ Kf7 57. Rgxg4 Qxb2 )54. Bxg5 $17 {[#]} fxg5 (54... Qe7 $1 $17 {} 55. Bh4 Qxc5 56. Rxd7 Qe5+ 57. Bg3 Qe4 )55. Rcd5 $11 {The position is equal.} Qe1 56. Rxd7 Qe5+ 57. Kh1 {
R4d6+ is the strong threat.} Qe1+ 58. Kh2 {Hoping for R4d6+.} Qe5+ 59. Kh1 {
And now R4d6+ would win.} Qe1+ 60. Kh2 {And White is the lucky defender. 
Weighted Error Value: White=0.63/Black=0.55} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Harikrishna,Pentala"]
[Black "So,Wesley"]
[Site "Online"]
[Round "10.2"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2732"]
[BlackElo "2770"]
[PlyCount "88"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. Bg5 Be7 8. e3 0-0 {D50: Queen's Gambit Declined:
Dutch-Peruvian Gambit.} 9. Be2 Nc6 10. Qd3 h6 {[#]} 11. Bxf6 $146 ({
Predecessor:} 11. Bh4 Nb4 12. Qd1 Bf5 13. Nd4 Bh7 14. 0-0 Ne4 15. Bxe7 Qxe7 16. a3 Nxc3 17. bxc3 {1/2-1/2 (44) Delavari,A (2222)-Mousavi,S (2422) Hamedan 2016} )Bxf6 {The position is equal.} 12. Rd1 Ne7 13. e4 Bxc3+ 14. Qxc3 Be6 15. 0-0 Qb6 16. e5 Rac8 17. Qd2 Nc6 18. h3 d4 19. Bd3 ({Don't blunder} 19. Nxd4 $2 Rcd8 $19 )Bd5 20. Rfe1 Rfe8 {...Bxf3 is the strong threat.} 21. Be4 Rcd8 22. b3 a5 23. Qf4 Bxe4 24. Rxe4 Qc5 25. Rde1 Re6 26. h4 d3 27. Rd1 Rd5 (27... b5 {is more complex.} 28. Rd2 Qc3 29. Kh2 Re7 30. g3 Rd5 )28. Qe3 Nxe5 (28... Qc2 {looks sharper.} 29. Rd2 Qc3 30. g3 b5 31. Rd1 g6 )29. Nxe5 {[#] Strongly
threatening Qxc5.} Qxe3 30. Rxe3 Rdxe5 31. Rxe5 Rxe5 32. Rxd3 $11 {
Endgame KR-KR} Re1+ 33. Kh2 Re2 34. Rd8+ Kh7 35. Rd7 Rxf2 36. Rxb7 Rxa2 37. Rxf7 Rb2 38. Ra7 Rxb3 {White must now prevent ...Ra3.} 39. Rxa5 Rb4 40. g3 Rb2+ 41. Kh3 Rb3 42. Kh2 Rb2+ 43. Kh3 Rb3 44. Kh2 Rb2+ {A rather calm draw. 
Weighted Error Value: White=0.02/Black=0.02} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Dubov,Daniil"]
[Black "Aronian,Levon"]
[Site "Online"]
[Round "10.3"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2699"]
[BlackElo "2781"]
[PlyCount "83"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. g3 Bb4+ 5. Bd2 Be7 6. Bg2 c6 7. Qc2 b6 8. 0-0 0-0 9. Bf4 Ba6 {E06: Closed Catalan: Early
deviations.} 10. cxd5 cxd5 11. Rc1 Nbd7 12. Nc3 Bb4 13. Bf1 Rc8 14. Qb3 Qe7 {
[#]} 15. Qa4 $146 ({Predecessor:} 15. Nd2 Nh5 16. Be3 Nb8 17. a3 Bxc3 18. Rxc3 Rxc3 19. Qxc3 Rc8 {1/2-1/2 (19) Enescu,C (2345)-Bendana Aragon,J (2325) ICCF
email 2012} )Bc4 16. Nb5 Ne4 (16... Bxb5 $14 17. Qxb5 Nb8 )17. a3 (17. Nxa7 $16 Ra8 18. b3 )Bxb5 $11 18. Qxb5 Bd6 19. Be3 f5 20. Rxc8 Rxc8 21. Rc1 Rxc1 22. Bxc1 g5 {[#]} (22... Kf7 $11 )23. Qc6 (23. Bxg5 $1 $16 {
} Nxg5 24. Nxg5 )g4 24. Ne1 Nf8 25. Nd3 Ng6 26. Bh6 Kf7 27. h3 Nf6 28. Bg5 h5 {The position is equal.} 29. hxg4 hxg4 30. e3 (30. Bxf6 {looks sharper.} Kxf6 31. Qc1 Qg7 32. e3 Qd7 33. Be2 )Qc7 31. Qxc7+ Bxc7 32. Bxf6 Kxf6 {
 Endgame KBN-KBN} 33. Be2 Bd6 34. Kf1 Nh8 35. Nc1 Nf7 36. Na2 a5 37. Nc3 Ke7 38. Ke1 Bc7 39. Nb5 Bb8 40. Kd2 Nd6 41. Nxd6 Kxd6 42. Bb5 {Weighted
Error Value: White=0.11/Black=0.15} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Anton Guijarro,David"]
[Black "Nepomniachtchi,Ian"]
[Site "Online"]
[Round "10.4"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2675"]
[BlackElo "2784"]
[PlyCount "78"]

1. e4 {} c5 2. Nf3 d6 3. d4 cxd4 4. Qxd4 Nf6 5. Bg5 Nc6 6. Bb5 {B53: Sicilian: 2...d6: Lines with Qxd4.} Bd7 7. Qd3 Nb4 8. Bxd7+ Qxd7 9. Qb3 {[#]} Nc6 $146 ({Predecessor:} 9... Na6 10. e5 Ne4 11. exd6 Nac5 12. Qe3 f6 13. 0-0 fxg5 14. b4 exd6 15. Nc3 0-0-0 16. bxc5 Nxc3 17. Qxc3 dxc5 {1-0 (38) Drus,M-Souply,Y (1895) ICCF email 2011} )10. Bxf6 gxf6 11. Nc3 Rc8 12. Nd5 Bg7 13. 0-0 0-0 14. Ne3 e6 15. Rad1 Rfd8 16. c3 Ne7 17. Rd2 Qc6 18. Qc2 Bh6 19. Nd4 Qc5 20. Qd1 d5 ({Better is} 20... Ng6 $14 )21. Qg4+ $16 Ng6 {
[#]} 22. exd5 (22. Qh3 $1 $16 {} Bxe3 23. fxe3 )Bxe3 $11 {
The position is equal.} 23. fxe3 f5 $1 {} 24. Qf3 (24. Qd1 {
looks sharper.} Rxd5 25. Qf3 Ne5 26. Qf2 Rcd8 27. Re2 )Qxd5 25. Rfd1 {
Strongly threatening Nb3.} Qxf3 26. Nxf3 Rxd2 27. Rxd2 { Endgame
KRN-KRN} Rc7 28. Kf2 Kg7 29. Rd4 Kf6 30. g4 fxg4 31. Rxg4 Ke7 32. Ke2 f5 33. Ra4 a6 34. Rb4 Nf8 35. a4 Kf6 36. Rh4 Ng6 37. Rb4 Nf8 38. Rh4 Ng6 39. Rb4 Nf8 {
Weighted Error Value: White=0.10/Black=0.07} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Carlsen,Magnus"]
[Black "Nakamura,Hikaru"]
[Site "Online"]
[Round "10.5"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2862"]
[BlackElo "2736"]
[PlyCount "107"]

1. e4 {} e5 2. Nf3 Nc6 3. Bb5 Nf6 4. 0-0 Nxe4 5. Re1 Nd6 6. Nxe5 Be7 7. Bf1 Nxe5 8. Rxe5 0-0 9. d4 Ne8 {C67: Ruy Lopez:
Berlin Defence: 4 0-0 Nxe4.} 10. Re1 d5 11. Bf4 Bd6 {[#] The position is equal.
} 12. Qf3 $1 $146 { A top novelty.} (12. Be5 c6 13. c3 Bxe5 14. Rxe5 Nd6 15. Bd3 g6 16. Nd2 f6 17. Re3 Bf5 18. Nb3 b6 19. Bxf5 Nxf5 20. Re2 Qd7 {
1/2-1/2 (20) Carlsen,M (2870)-Nakamura,H (2741) Kolkata 2019} )({Predecessor:} 12. Bxd6 Nxd6 13. Bd3 Bf5 14. Bxf5 Nxf5 15. c3 Re8 16. Nd2 c6 17. Rxe8+ Qxe8 18. Nf3 {1/2-1/2 (33) Aronian,L (2781)-Nakamura,H (2736) chess24.com INT 2020} )Bxf4 13. Qxf4 Qd6 14. Qf3 Nf6 15. Nd2 Bg4 16. Qg3 Qxg3 17. hxg3 Rfe8 18. f3 Bd7 19. g4 h6 20. Kf2 Rxe1 21. Rxe1 Re8 22. Rc1 c6 23. a4 {} Re7 24. a5 Ne8 25. Nb3 Nd6 26. Nc5 Bc8 27. b3 g6 28. c4 dxc4 29. bxc4 Kg7 30. Bd3 f5 31. gxf5 Bxf5 32. Be2 h5 33. Nd3 Bc8 34. Nb4 Nf5 35. d5 c5 36. Nd3 Rc7 37. Nf4 h4 38. Bd3 g5 39. Ne2 Nd6 40. Nc3 Kf6 41. Re1 Bd7 (41... Rg7 {with more complications.} 42. Ne4+ Nxe4+ 43. Rxe4 Bd7 44. Re1 Rg8 )42. Ne4+ (42. Ke3 {seems wilder.} Bc8 43. Ne4+ Nxe4 44. fxe4 Ke5 45. Rf1 )Nxe4+ 43. Bxe4 $11 { Endgame KRB-KRB} b5 44. d6 Rc8 45. cxb5 Bxb5 46. Rb1 Bc4 (46... a6 {is more complex.} 47. Rxb5 axb5 48. a6 Ke6 49. Ke3 Kxd6 50. a7 c4 )47. Rb7 Rd8 48. Rxa7 {And now Rc7 would win.} (48. d7 {feels hotter.
} a6 49. Rb6+ Ke5 50. Ke3 Rxd7 51. Rg6 )Rxd6 49. Rc7 Rd2+ 50. Kg1 Bd5 $2 { [#] This costs Black the game.} (50... g4 $16 51. fxg4 (51. Rxc5 {
gets mated.} g3 52. Rc6+ Ke7 53. Bc2 Rxc2 54. Rc7+ Kf6 55. Rxc4 {
Remove Defender} Rxc4 56. Kf1 Rc1+ 57. Ke2 h3 58. Kd2 hxg2 59. Kxc1 g1=Q+ 60. Kc2 Qc5+ 61. Kd2 g2 62. f4 g1=Q 63. a6 Qge3+ { Double Attack} 64. Kd1 Qcc1# )Be2 )51. Rd7 $1 $18 {White is clearly winning.} Ke6 52. Rd8 c4 53. a6 c3 54. Rxd5 {Weighted Error Value: White=0.04/Black=0.22} (54. Bxd5+ $142 Ke7 {[#]} 55. a7 $1 {} Rd1+ 56. Kh2 )1-0

[Event "Airthings Masters Preliminary"]
[White "Giri,Anish"]
[Black "Grischuk,Alexander"]
[Site "Online"]
[Round "10.6"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2764"]
[BlackElo "2777"]
[PlyCount "101"]

1. e4 {} e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. 0-0 a6 7. Bb3 Ba7 8. Re1 0-0 9. h3 h6 10. Nbd2 {} Re8 11. Nf1 Be6 12. Bc2 {12.Be3 is a critical
line. C54: Giuoco Piano: 4 c3 Nf6, main lines with 5 d4 and 5 d3.} d5 13. Qe2 d4 14. Bd2 b5 15. Ng3 {[#]} a5 $146 ({Predecessor:} 15... Nd7 16. a4 Qe7 17. Nf5 Bxf5 18. exf5 Qd6 19. Qe4 Nf6 20. Qh4 b4 21. cxb4 Nxb4 22. Bxb4 Qxb4 {
1/2-1/2 (28) Manso Gil,A (2579)-Zidu,J (2590) ICCF email 2016} )16. Bb3 a4 17. Bxe6 Rxe6 18. Red1 a3 19. bxa3 (19. Rab1 {seems wilder.} Bc5 20. cxd4 Bxd4 21. bxa3 Rxa3 22. Rxb5 Rxa2 23. Nf5 )Bb6 {The position is equal.} 20. Nf5 (20. Rab1 {feels hotter.} Rxa3 21. cxd4 Nxd4 22. Nxd4 Bxd4 23. Bc1 )Rxa3 21. cxd4 Nxd4 22. N3xd4 Bxd4 23. Nxd4 Qxd4 24. Be3 Qd7 25. Rac1 c6 26. Rc2 Qb7 27. Bc5 Ra4 28. a3 Nd7 29. Bb4 Qb6 {White should prevent ...c5.} 30. Rdc1 Ra8 31. Rc3 Rc8 32. Qe3 Qd4 33. Kf1 Rg6 34. R3c2 Kh7 35. g4 Qxe3 36. fxe3 Re6 37. Kg2 Kg8 38. Kf3 Rf6+ 39. Ke2 Re6 40. Rc3 Kh7 41. Kf3 Rf6+ 42. Kg2 Re6 43. R3c2 Kg8 44. Kf2 Rf6+ 45. Ke2 Re6 46. Rc3 Kh7 47. R1c2 Kg8 48. Kf2 Rf6+ 49. Kg2 Re6 50. Rc1 Kh7 51. R3c2 {An uneventful encounter.  Weighted Error Value: White=0.
03/Black=0.01} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Grischuk,Alexander"]
[Black "Vachier-Lagrave,Maxime"]
[Site "Online"]
[Round "11.1"]
[Annotator "TA"]
[Result "0-1"]
[Date "2020.12.23"]
[WhiteElo "2777"]
[BlackElo "2784"]
[PlyCount "109"]

1. e4 {} c5 2. Nf3 d6 3. Bb5+ Nd7 4. d4 cxd4 5. Qxd4 a6 6. Be2 {B51: Sicilian: Moscow Variation (3 Bb5+) without 3...Bd7.} Ngf6 7. 0-0 g6 {now supersedes 7...e5.} (7... e5 $5 {} 8. Qe3 Be7 $11 )8. e5 {White is slightly better.} dxe5 9. Nxe5 Bg7 {[#]} 10. Bf4 $146 ({
Predecessor:} 10. Nf3 0-0 11. Rd1 e5 12. Qh4 Qc7 13. Nc3 b6 14. Be3 Bb7 15. Nd2 Rae8 16. Qc4 {1/2-1/2 (63) Alekseev,E (2626)-Savchenko,B (2551)
Khanty-Mansiysk 2020} )0-0 11. Rd1 Qb6 12. Qxb6 Nxb6 13. Nc3 Bf5 14. Bf3 Nh5 15. Be3 {} Bxe5 16. Bxb6 Nf6 17. Re1 ({Don't go for} 17. Bxb7 $2 Rab8 $19 )Nd7 {Threatens to win with ...Bxc3.} 18. Ba5 Rab8 19. Rad1 Rfe8 (19... Bf6 $11 {remains equal.} )20. Be4 (20. g4 $16 Be6 21. Rxd7 $1 {
} Bxc3 22. Rxe6 $1 {} Bxa5 23. Rexe7 Rxe7 24. Rxe7 )Be6 21. Bd5 Bxc3 22. Bxc3 Bxd5 23. Rxd5 Nb6 24. Rd4 (24. Rd3 {is more complex.} Na4 25. Bd4 b5 26. Kf1 e6 27. Re2 )Rbc8 25. Rb4 (25. f3 {feels hotter.} e6 26. a4 Rc5 27. a5 Nd5 28. Bd2 )Nd5 26. Rxb7 Nxc3 27. bxc3 Rxc3 28. Rexe7 (28. Re2 $11 )Rxe7 $17 29. Rxe7 Rxc2 $11 { Endgame ( ->
...Rc1+). KR-KR} 30. g3 (30. g4 $17 )Rxa2 $19 31. h4 h5 (31... a5 $19 32. Kf1 Kg7 )32. Ra7 $17 a5 33. Kg2 a4 (33... Ra3 $1 $19 34. Kf1 Kg7 )34. Kf3 Kg7 ({Black should try} 34... a3 $1 $19 35. Ke4 Kf8 )35. Ra6 (35. Ke4 $15 )a3 $19 36. Kg2 (36. Ke4 {might work better.} )Ra1 37. Kf3 Kf8 38. Ra7 (38. Kf4 $142 )Ke8 39. Kg2 f6 40. Ra6 Kf7 41. Kf3 Ra2 (41... a2 $19 {and
Black stays clearly on top.} 42. Ke2 Ke7 )42. Ke3 (42. Ke4 $17 {is a better
defense.} )g5 $2 (42... Ke7 $19 {White must now prevent ...Ra1.} 43. Kd4 g5 )43. hxg5 fxg5 {...Ra1 is the strong threat.} 44. Ra5 $2 {} (44. Kf3 $1 $15 )Ra1 45. Kf3 g4+ (45... a2 $19 46. Ra6 Ke7 )46. Kf4 $11 a2 {
aiming for ...Ke7.} 47. Kg5 $2 {} (47. Kf5 $11 Ke8 48. Kg6 )Ke6 $19 48. Ra8 Ke5 (48... Kd5 $142 49. Ra3 Kc4 )49. Re8+ Kd4 50. Re2 Kd3 51. Rb2 Ke4 $1 { Hoping for ...Kd3.} 52. Re2+ $2 {} (52. Rc2 $11 Kf3 53. Kg6 )Kf3 $1 53. Rb2 {[#]} Kg2 $1 54. Rc2 {[#]} Rf1 $1 55. Rb2 {Weighted Error Value: White=0.83/Black=0.37} 0-1

[Event "Airthings Masters Preliminary"]
[White "Nakamura,Hikaru"]
[Black "Giri,Anish"]
[Site "Online"]
[Round "11.2"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2736"]
[BlackElo "2764"]
[PlyCount "109"]

1. e4 {} c5 2. Nf3 e6 3. g3 Nc6 4. Bg2 Nf6 5. d3 d5 6. Nbd2 Be7 7. 0-0 0-0 8. Re1 h6 {C00:
French: Unusual White 2nd moves.} 9. c3 b5 10. exd5 Nxd5 {The position is
equal.} 11. a4 b4 12. c4 {[#]} Nc7 $146 ({Predecessor:} 12... Nf6 13. Nd4 Qxd4 14. Bxc6 Rb8 15. Nb3 Qd8 16. d4 cxd4 17. Bf4 Bd6 18. Qxd4 Bxf4 19. Qxf4 {
1/2-1/2 (50) In 'T Veld,H (2223)-Webbink,A (2233) ICCF email 2019} )13. Nb3 Bb7 14. Be3 Na6 15. d4 cxd4 16. Nfxd4 Qc8 17. Qe2 Nxd4 18. Bxd4 {Strongly
threatening Bxb7.} Bxg2 19. Kxg2 Rd8 20. Qf3 Qxc4 (20... Nc5 $14 21. Bxc5 Bxc5 )21. Rac1 $40 { White is out for blood.} Qd5 22. Qxd5 Rxd5 23. Rc6 Nb8 (23... Rd6 $16 24. Rec1 Rad8 )24. Rc8+ $18 Rd8 25. Rec1 Nd7 26. Rxa8 Rxa8 27. Rc7 $1 { Double Attack} Rd8 28. Rxa7 Bf6 29. a5 (29. Bxf6 $18 Nxf6 30. a5 )Bxd4 $16 30. Nxd4 { Endgame KRN-KRN} Ne5 {[#]} 31. a6 $1 Rxd4 {KRN-KR} 32. Ra8+ Kh7 {And now ...Rd7 would win.} 33. a7 Nc6 {[#]} (33... Rd5 $16 34. Rb8 Ra5 )34. Rh8+ $1 $18 { Decoy} Kxh8 35. a8=Q+ { Double Attack. KQ-KRN} Nd8 36. Qa7 Rd5 37. Qb6 Kg8 38. Qxb4 Nc6 $2 {[#]} (38... g6 39. Qc4 h5 )39. Qb7 $2 (39. Qa4 $1 $18 {} Nd4 40. Qe8+ Kh7 41. Qxf7 )Nd4 $16 40. Qb8+ Kh7 41. Qf8 Kg6 42. g4 h5 43. h3 hxg4 44. hxg4 e5 (44... Ne2 $16 {might work better.} 45. b4 Nf4+ 46. Kf3 Nd3 )45. Qa8 Ne6 46. b4 Rd4 47. b5 {b6 is the strong threat.} Rxg4+ 48. Kf1 {Hoping for b6.} Rb4 $2 (48... Rd4 49. b6 Nd8 )49. Qc6 $18 Kg5 $2 (49... Kh7 50. b6 Rb2 51. Qe4+ g6 )50. b6 Nf4 {( -> ...Rb1+)} 51. Kg1 Rb1+ 52. Kh2 Ne6 (52... Rb2 $142 53. b7 Rxf2+ 54. Kg3 Rb2 )53. Qe4 Rb5 54. b7 Nd8 55. b8=R {
Weighted Error Value: White=0.09/Black=0.47} (55. b8=Q $142 Rxb8 56. Qxe5+ {
 Double Attack} f5 57. Qxb8 Nf7 58. Qb6 f4 59. Qc7 Kg6 60. Qxf4 )1-0

[Event "Airthings Masters Preliminary"]
[White "Nepomniachtchi,Ian"]
[Black "Carlsen,Magnus"]
[Site "Online"]
[Round "11.3"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2784"]
[BlackElo "2862"]
[PlyCount "48"]

1. e4 {} c5 2. Nf3 Nc6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e5 6. Ndb5 d6 7. Bg5 a6 8. Na3 b5 9. Nd5 Be7 10. Bxf6 Bxf6 11. c4 b4 12. Nc2 a5 13. g3 {B33:
Sicilian: Pelikan and Sveshnikov Variations.} h5 14. h4 g6 15. Bh3 Bb7 16. Qd3 Bg7 {[#]} 17. Rd1 $146 ({Predecessor:} 17. a3 0-0 18. 0-0 bxa3 19. Rxa3 Rb8 20. Rd1 Ba6 21. b4 Bc8 22. Bxc8 axb4 23. Ra6 Rxc8 24. Ndxb4 {1-0 (36) Poetsch,H 
(2474)-Goldsworthy,P (2088) Schwaebisch Gmuend 2014} )0-0 18. 0-0 Rb8 19. b3 Re8 20. Rfe1 Ba8 21. Nde3 Bf8 22. Nd5 Bg7 23. Nde3 Bf8 24. Nd5 Bg7 {
Weighted Error Value: White=0.12/Black=0.07} 1/2-1/2

[Event "Airthings Masters Preliminary"]
[White "Aronian,Levon"]
[Black "Anton Guijarro,David"]
[Site "Online"]
[Round "11.4"]
[Annotator "TA"]
[Result "0-1"]
[Date "2020.12.23"]
[WhiteElo "2781"]
[BlackElo "2675"]
[PlyCount "120"]

1. e4 {} c5 2. Nf3 Nc6 3. Bb5 e6 4. 0-0 Nge7 5. c3 a6 6. Be2 d5 7. exd5 Nxd5 8. d4 Be7 {B30: Sicilian: 2...Nc6 3 Bb5, lines without ...g6.} 9. dxc5 Bxc5 10. c4 Nf6 {White is slightly better.} 11. Qxd8+ Kxd8 {[#]} 12. a3 $146 ({
Predecessor:} 12. Rd1+ Ke7 13. Nc3 Ba7 14. b3 Rd8 15. Ba3+ Ke8 16. Rxd8+ Nxd8 17. Rd1 Bd7 18. Ne5 {1-0 (41) Magem Badals,J (2534)-Bauer,C (2602) San
Sebastian 2009} )Ke7 13. b4 Nd4 14. Ra2 Nxe2+ 15. Rxe2 Bd6 16. Nc3 Rd8 17. Be3 Bd7 18. Rd1 Bc7 19. Ne5 Bxe5 20. Bc5+ { Discovered Attack} Ke8 21. Rxe5 {[#]} Ba4 $1 22. Rc1 Bb3 23. Ne4 Nxe4 24. Rxe4 Rd3 25. Bb6 Rc8 26. c5 Bd5 27. Re3 Rxe3 28. fxe3 $11 { Endgame KRB-KRB} f5 29. Kf2 Kd7 30. Rd1 Kc6 31. a4 g5 (31... h5 $11 )32. Rb1 (32. g4 $1 $14 Rf8 33. Kg1 )Ra8 33. Rd1 (33. g4 $5 )h5 34. e4 fxe4 35. Ke3 Rf8 36. h3 Rf7 37. Bd8 g4 38. hxg4 hxg4 39. Rb1 {Black converts the advantage convincingly.} g3 40. Rb2 Rf1 41. Bh4 Ra1 42. Bxg3 (42. Kf4 $17 )Ra3+ $1 $19 (42... Rxa4 43. Kf4 $15 )43. Kf4 e5+ $1 (43... Rxa4 44. Be1 $15 )44. Kg4 Be6+ ({Resist} 44... Rxa4 45. Kf5 $15 )45. Kh4 e3 46. Bxe5 Bc4 ({Don't play} 46... Rxa4 47. Kg3 $17 )47. g4 (47. Rb1 $142 )e2 ({But not} 47... Rxa4 48. Kg3 $17 )48. Rb1 Rxa4 49. Bg3 Kb5 50. Be1 Ra3 $1 51. Bg3 $2 (51. Rc1 )Rd3 52. Re1 (52. Rh1 $142 Kxb4 53. g5 )Rd1 53. g5 Kxb4 54. g6 Kxc5 55. g7 {[#]} Rxe1 $1 {Black mates.} 56. Bxe1 Kd4 57. Kg3 Kd3 58. Kf2 {[#]} b6 $1 59. Kf3 a5 60. Kf2 Bd5 {Weighted
Error Value: White=0.39/Black=0.04} 0-1

[Event "Airthings Masters Preliminary"]
[White "So,Wesley"]
[Black "Dubov,Daniil"]
[Site "Online"]
[Round "11.5"]
[Annotator "TA"]
[Result "1-0"]
[Date "2020.12.23"]
[WhiteElo "2770"]
[BlackElo "2699"]
[PlyCount "69"]

1. e4 {} e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. 0-0 b5 6. Bb3 Bc5 7. a4 Rb8 8. c3 d6 9. d4 Bb6 10. axb5 axb5 11. Na3 0-0 12. Nxb5 Bg4 13. Re1 {C78: Ruy Lopez:
Archangelsk and Möller Defences.} Bxf3 14. gxf3 Nh5 15. Kh1 {The position is
equal.} Qf6 { 15...exd4 is not played anymore.} 16. Be3 exd4 17. cxd4 Ba5 $1 {} 18. Rg1 Rxb5 19. Ba4 Rxb2 {...Bc3 is the strong
threat.} ({Avoid the trap} 19... Rfb8 $2 20. Bxb5 Rxb5 21. Qe2 $16 )20. Bxc6 {
 Discovered Attack} Bb6 21. Rg4 {[#]} g6 $146 ({Predecessor:} 21... Rb4 22. e5 dxe5 23. dxe5 Qe7 24. Qd5 Bxe3 25. fxe3 g6 26. Rxb4 Qxb4 27. e6 Qc3 {1/2-1/2 (45) Ivanchuk,V (2725)-Shirov,A (2700) Belgrade 1997} )22. f4 Rb4 {
} 23. Ra4 Rxa4 24. Qxa4 Ng7 25. Bd5 Kh8 26. h3 Qe7 27. f5 gxf5 28. exf5 Nxf5 29. Bg5 f6 ({But not} 29... Qe1+ $2 30. Kg2 $18 )30. Re4 $36 {
 White is more active.} Qg7 { [#]} (30... Qd8 $11 31. Bd2 Ng7 )31. Re8 $1 {White mates.} Ba7 {[#]} 32. Qd7 $3 {} h6 (32... Bxd4 33. Qc8 )33. Qc8 Rxe8 34. Qxe8+ Kh7 {[#]} 35. Bxf6 $1 { Weighted
Error Value: White=0.06/Black=0.35} 1-0

[Event "Airthings Masters Preliminary"]
[White "Radjabov,Teimour"]
[Black "Harikrishna,Pentala"]
[Site "Online"]
[Round "11.6"]
[Annotator "TA"]
[Result "1/2-1/2"]
[Date "2020.12.23"]
[WhiteElo "2765"]
[BlackElo "2732"]
[PlyCount "84"]

1. d4 {} Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 dxc4 6. a4 b5 7. axb5 {D44: Semi-Slav: Botvinnik System.} cxb5 8. Nxb5 Qb6 $1 {
} 9. Nc3 {The position is equal.} ({Don't go for} 9. Qa4 $2 Bd7 $19 )Qxb2 10. Bd2 Nd5 11. Nxd5 exd5 12. Rb1 Qa2 13. e4 Bd6 14. Be2 0-0 15. 0-0 {[#]} dxe4 $146 ({Predecessor:} 15... Re8 16. Ra1 Qb2 17. Ra5 dxe4 18. Bxc4 exf3 19. Qxf3 Re7 20. Bc3 Qb6 21. Qxa8 Qc7 {0-1 (46) Pashikian,A (2631)
-Vaibhav,S (2521) Abu Dhabi 2014} )16. Ng5 Bf5 {aiming for ...h6.} 17. Rc1 Qb3 {Threatens to win with ...h6.} 18. Bxc4 Qxd1 19. Rfxd1 {[#] Bd5 is the strong
threat.} Nd7 20. Bd5 {Black must now prevent Nxf7.} Rae8 21. Rc6 Be7 22. Bxe4 Nb8 23. Rc2 Bxg5 24. Bxf5 Bxd2 25. Rcxd2 g6 26. Bg4 Rd8 27. Ra2 Rfe8 {Hoping
for ...Rxd4!} 28. h3 ({Avoid the trap} 28. Rxa7 $2 {[#]} Rxd4 $3 {} 29. Rf1 Rxg4 $19 )a6 29. Be2 Rd6 30. Rda1 Rxd4 31. Bxa6 Nxa6 32. Rxa6 $11 { Endgame KRR-KRR} Rde4 33. Ra8 Rxa8 34. Rxa8+ {KR-KR} Kg7 35. Ra7 h5 36. g3 Rb4 37. h4 Rb2 38. Kg2 Rc2 39. Kg1 Rc1+ 40. Kg2 Rc2 41. Kg1 Rc1+ 42. Kg2 Rc2 {An uneventful encounter.  Weighted Error Value: White=0.02/Black=0.01} 1/2-1/2

