[Event "Quantbox Chennai GM 2025"]
[Site "Chennai IND"]
[Date "2025.08.12"]
[Round "6.4"]
[White "Keymer, Vincent"]
[Black "Erigaisi, Arjun"]
[Result "1/2-1/2"]
[Annotator "Crowther,Mark"]
[ECO "D12"]
[WhiteElo "2730"]
[BlackElo "2776"]
[WhiteFideId "-1"]
[WhiteFideId "-1"]
[PlyCount "82"]
[GameId "2211130995669474"]
[EventDate "2025.08.07"]

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 8. Qb3 Qc7 9. cxd5 {D12: Slav Defence: 3 Nf3 Nf6 4 e3 Bf5.} cxd5 10. Bd2 Nc6 11. O-O-O a6 {[#]} 12. Nxg6 hxg6 13. Kb1 Be7 {[%cal Ob7b5]} (13... Rxh2 $2 14. Rxh2 O-O-O 15. Rh1 $18) 14. Rc1 O-O (14... Rxh2 $2 15. Rxh2 Qxh2 16. Qxb7 $18) (14... Rc8 $11) 15. Qd1 $14 Rfc8 (15... e5 $5) 16. g4 Qd8 17. h4 Na5 {[%cal Bc6a5,Ba5c4,Bc4d2][%mdl 32] [#]} 18. h5 $146 (18. f4 b5 19. g5 Nh5 20. Rh2 (20. Be1 Nc4 21. Bxc4 dxc4 22. Rh2 Rab8 23. Ne4 Qd5 24. Qf3 b4 25. Nd2 Qb5 26. Qf1 c3 27. Qxb5 cxd2 28. Rxc8+ Rxc8 29. Rxd2 axb5 30. Rc2 Rc4 31. Kc1 {1-0 Lesiege,A (2521)-Barbosa,O (2518) PRO League Atlantic Chess.com INT rapid 2017 (1)}) 20... Nc4 21. f5 exf5 22. Qf3 Bd6 23. Rg2 Bb4 24. Be1 Bxc3 25. Rxc3 {0-1 Ozturk Orenli,K (2261)-Chigaeva,A (2143) EU-ch (Women) 18th Riga 2017 (5)}) 18... gxh5 19. Bd3 (19. g5 $142) 19... Nc4 $16 20. Qe2 Nxd2+ 21. Qxd2 Bb4 {[#]} (21... hxg4 $2 22. Qh2 Kf8 23. Qh8+ Ng8 24. Bh7 $18 (24. fxg4 Bb4 $14)) 22. gxh5 $6 {According to the engines this reduces Keymer's advantage.} (22. g5 $1 $16 {[%cal Rg5f6]}) 22... Kh8 (22... Ne8 $14) 23. Qg2 (23. h6 $6 g6 $11) (23. Rcg1) 23... Bxc3 24. bxc3 {The game is back to almost equal.} (24. h6 g6 25. bxc3 (25. Rxc3 Rxc3 26. bxc3 Rc8 $17) 25... Rc6 $17) (24. Rhg1 $1 $16 {[%csl Gg1][%cal Rg2g7] is slightly more accurate.} Qf8 25. bxc3) 24... Rc6 (24... Ne8 $11 {should be considered.}) 25. Rcg1 (25. Rhg1 $1 $14 Qf8 26. Qg5) 25... Qf8 $11 26. Ka1 ({Much worse is} 26. h6 g6 27. Bxg6 fxg6 28. Qxg6 Nh7 $17 (28... Rxc3 $2 {is the wrong capture.} 29. Qg7+ Qxg7 30. hxg7+ Kg8 31. Rh8+ {[%mdl 64] Skewer} Kf7 32. Rxa8 $18)) 26... Rxc3 27. Bb1 $6 $11 (27. Bg6 $5 Ng8 (27... fxg6 28. hxg6+ Kg8 29. Qh3) 28. h6 gxh6 (28... fxg6 29. hxg7+ Kxg7 30. Qxg6#) (28... Nxh6 29. Bb1 $11) 29. Bb1 $11) 27... Rc6 28. Qg5 {[%mdl 1024] White has compensation.} Nh7 29. Qe5 {Threatening mate with h6.} f6 $1 ({And not} 29... Nf6 30. h6 g6 31. Qxf6+ Kh7 32. Rxg6) 30. Qg3 f5 31. h6 g5 {The position is equal.} 32. Qe5+ Qf6 33. Qxf6+ Nxf6 34. Rxg5 Rg8 {Inhibits Rg7.} 35. Rxg8+ Kxg8 {[%mdl 4096]} 36. Rg1+ Kh7 37. Rg7+ Kxh6 38. Rxb7 Rc3 39. Re7 Rxe3 {[%cal Oh6g5]} 40. Bxf5 Rxf3 41. Bc2 Rc3 1/2-1/2

[Event "Quantbox Chennai GM 2025"]
[Site "Chennai IND"]
[Date "2025.08.15"]
[Round "9.4"]
[White "Robson, Ray"]
[Black "Keymer, Vincent"]
[Result "0-1"]
[Annotator "Crowther,Mark"]
[ECO "E12"]
[WhiteElo "2687"]
[BlackElo "2730"]
[WhiteFideId "2023970"]
[WhiteFideId "12940690"]
[PlyCount "82"]
[GameId "2211124808956195"]
[EventDate "2025.08.07"]

1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. a3 Bb7 5. Nc3 g6 6. Qc2 d5 {E12: Queen's Indian: Unusual White 4th moves, 4 a3, 4 Nc3 Bb7 5 a3 and 4 Nc3 Bb7 .} 7. cxd5 exd5 8. Bf4 a6 {Wards off Nb5. White is slightly better.} 9. g3 Bg7 10. Bg2 O-O 11. O-O Re8 12. Rfd1 Nbd7 {[#]} 13. Rac1 $146 (13. Ne5 Nf8 14. b4 Ne6 15. Be3 c6 16. Rac1 Nd7 17. Nxd7 Qxd7 18. Na4 Qd8 19. Qb3 {½-½ Lautier,J (2625)-Torre,E (2545) Olympiad-33 Elista 1998 (11.1)}) 13... c6 {Keymer was highly critical of this after the game but Robson shows he's not really familiar with this structure and drifts into trouble.} 14. a4 a5 15. Bd6 h5 (15... Nb8 $11 16. Ba3 Nbd7) 16. e3 Nb8 17. Be5 Na6 18. b3 Nb4 {Black's already better.} 19. Qb1 Bc8 20. Qb2 Bf5 21. Qe2 {Repels Nd3} Bf8 ({Black should try} 21... Ne4 $17 {Threatens to win with ...Nxc3.} 22. Bxg7 Nxc3 (22... Kxg7 23. Na2 $15) 23. Rxc3 Kxg7) 22. h4 ({Better is} 22. Bf4 $15) 22... Bg4 $17 {Black converts the advantage convincingly.} 23. Na2 $2 {White's position is just so unpleasant.} (23. Qf1 $142) 23... Rc8 24. Nxb4 axb4 (24... Bxb4 25. Qf1 $15) 25. Qa6 {[#]} Ne4 $1 26. a5 (26. Bf4 $17) 26... bxa5 $19 27. Rxc6 Rxc6 28. Qxc6 Qa8 29. Rc1 Qxc6 30. Rxc6 Rc8 31. Rxc8 (31. Rb6 $142 Rc1+ 32. Kh2) 31... Bxc8 {-3 the pawn majority on the queenside will settle things.} 32. Ng5 (32. Ne1 {was worth a try.} a4 33. bxa4) 32... Nc3 {Black is clearly winning.} 33. Nf3 a4 34. bxa4 b3 35. Bf1 b2 36. Bd3 Bb4 ({Less strong is} 36... b1=N 37. a5 $17) 37. Kg2 Bf5 38. Bxf5 gxf5 39. Nd2 {Dodges Ne4} Nxa4 {[#] Discovered Attack} ({Stronger than} 39... b1=B 40. Nxb1 Nxb1 41. Bc7 $11) 40. Nb1 Nc3 41. Nd2 Nb5 {Precise until the end.} (41... b1=N $2 42. Nb3 $19) 0-1

