[Event "BCW Open Tournament 131 Arena"] [Site "https://lichess.org/IfvwYdr8"] [Date "2026.05.17"] [Round "-"] [White "subhayu_biswas"] [Black "cheesabir"] [Result "1-0"] [GameId "IfvwYdr8"] [UTCDate "2026.05.17"] [UTCTime "10:37:39"] [WhiteElo "685"] [BlackElo "1065"] [WhiteRatingDiff "+85"] [BlackRatingDiff "-321"] [Variant "Standard"] [TimeControl "600+2"] [ECO "A05"] [Opening "Zukertort Opening"] [Termination "Normal"] [Annotator "lichess.org"] 1. Nf3 { [%eval 0.1] } 1... Nc6 { [%eval 0.44] } 2. Nc3 { [%eval 0.0] } 2... Nf6 { [%eval 0.22] } { A05 Zukertort Opening } 3. e4 { [%eval 0.11] } 3... Nb4? { (0.11 → 1.32) Mistake. e5 was best. } { [%eval 1.32] } (3... e5 4. d4 exd4 5. Nxd4 Bb4 6. Nxc6 bxc6 7. Bd3 d5 8. exd5) 4. Nb5?? { (1.32 → -0.71) Blunder. a3 was best. } { [%eval -0.71] } (4. a3 Nc6 5. e5 Ng8 6. Bc4 e6 7. d4 d6 8. Qe2 d5) 4... a6? { (-0.71 → 0.43) Mistake. Nxe4 was best. } { [%eval 0.43] } (4... Nxe4 5. c4 d6 6. d4 c6 7. a3 Na6 8. Bd3 Nxf2 9. Kxf2) 5. a3?? { (0.43 → -3.03) Blunder. Nc3 was best. } { [%eval -3.03] } (5. Nc3 d5 6. e5 d4 7. exf6 Bf5 8. d3 dxc3 9. bxc3 Nd5 10. c4 Nxf6) 5... axb5 { [%eval -2.73] } 6. Ne5? { (-2.73 → -4.48) Mistake. e5 was best. } { [%eval -4.48] } (6. e5 Ng8 7. c3 Nd5 8. Bxb5 c6 9. Bc4 b5 10. Bxd5 cxd5 11. O-O e6) 6... d5?! { (-4.48 → -3.09) Inaccuracy. d6 was best. } { [%eval -3.09] } (6... d6 7. Nxf7 Kxf7 8. d4 g6 9. Be3 c6 10. axb4 Rxa1 11. Qxa1 Nxe4 12. c4) 7. Nd3? { (-3.09 → -5.23) Mistake. c3 was best. } { [%eval -5.23] } (7. c3 Na6 8. exd5 Qxd5 9. d4 Nd7 10. c4 bxc4 11. Bxc4 Qe4+ 12. Be2 Nxe5) 7... dxe4?? { (-5.23 → -2.49) Blunder. Nxd3+ was best. } { [%eval -2.49] } (7... Nxd3+ 8. Bxd3 dxe4 9. Bxb5+ c6 10. Be2 g6 11. O-O Bg7 12. d3 exd3 13. Qxd3) 8. Nxb4 { [%eval -2.57] } 8... c5?? { (-2.57 → -0.41) Blunder. e5 was best. } { [%eval -0.41] } (8... e5 9. c3 c6 10. d3 Bf5 11. Qd2 Bg6 12. dxe4 Qxd2+ 13. Bxd2 Nxe4 14. Be3) 9. Bxb5+ { [%eval -0.38] } 9... Bd7 { [%eval -0.39] } 10. Bxd7+ { [%eval -0.35] } 10... Qxd7 { [%eval -0.29] } 11. c3?? { (-0.29 → -4.82) Blunder. Na2 was best. } { [%eval -4.82] } (11. Na2 g6 12. O-O Bg7 13. Nc3 O-O 14. Qe2 Qf5 15. Re1 Ra6 16. d3 exd3) 11... Ra5?? { (-4.82 → -0.89) Blunder. cxb4 was best. } { [%eval -0.89] } (11... cxb4 12. d4 exd3 13. O-O e6 14. c4 Be7 15. Be3 O-O 16. Bb6 h5 17. Rb1) 12. Nc2 { [%eval -0.94] } 12... Rb5?! { (-0.94 → 0.04) Inaccuracy. g6 was best. } { [%eval 0.04] } (12... g6 13. O-O Bg7 14. Rb1 Ra6 15. Qe2 O-O 16. b4 Rc8 17. c4 Rd6 18. h3) 13. c4?! { (0.04 → -0.87) Inaccuracy. b4 was best. } { [%eval -0.87] } (13. b4 Rb6 14. c4 Rc6 15. Ne3 g6 16. O-O Bg7 17. Rb1 O-O 18. bxc5 Rxc5) 13... Rb6?! { (-0.87 → -0.01) Inaccuracy. Rb3 was best. } { [%eval -0.01] } (13... Rb3 14. O-O Qd3 15. Rb1 Qxc4 16. Na1 Rd3 17. b4 e6 18. Qa4+ b5 19. Qa8+) 14. a4?! { (-0.01 → -0.82) Inaccuracy. b4 was best. } { [%eval -0.82] } (14. b4 g6 15. O-O Bg7 16. bxc5 Rc6 17. Rb1 Rxc5 18. Ne3 O-O 19. Qb3 Bh6) 14... Ra6 { [%eval -0.42] } 15. Ne3 { [%eval -0.68] } 15... Rd6 { [%eval -0.26] } 16. a5 { [%eval -0.45] } 16... b6?? { (-0.45 → 2.47) Blunder. e6 was best. } { [%eval 2.47] } (16... e6 17. b3 Be7 18. Bb2 O-O 19. Bc3 Ne8 20. Ng4 f5 21. Ne5 Qc7 22. O-O) 17. axb6 { [%eval 2.37] } 17... Qb7? { (2.37 → 3.93) Mistake. Qc6 was best. } { [%eval 3.93] } (17... Qc6 18. Qb3 Rd8 19. Nd5 e6 20. Nc7+ Ke7 21. Ra7 Nd7 22. O-O f6 23. Na6) 18. Qa4+ { [%eval 3.71] } 18... Qc6?! { (3.71 → 5.51) Inaccuracy. Nd7 was best. } { [%eval 5.51] } (18... Nd7 19. b4 Rxb6 20. Nd5 e6 21. Nxb6 Qxb6 22. Qa8+ Nb8 23. b5 f5 24. Ra7) 19. Qxc6+ { [%eval 5.22] } 19... Rxc6 { [%eval 5.36] } 20. Ra8+ { [%eval 5.39] } 20... Rc8?! { (5.39 → 10.42) Inaccuracy. Kd7 was best. } { [%eval 10.42] } (20... Kd7 21. b7 Rb6 22. b8=R Rxb8 23. Rxb8 Kc7 24. Ra8 e6 25. Rf1 Kb7 26. Ra1) 21. b7 { [%eval 9.24] } 21... Rxa8 { [%eval 8.93] } 22. bxa8=Q+ { [%eval 8.25] } 22... Kd7 { [%eval 8.09] } 23. b3 { [%eval 7.76] } 23... g5 { [%eval 9.05] } 24. Ba3 { [%eval 8.48] } 24... g4 { [%eval 9.5] } 25. Bxc5 { [%eval 9.09] } 25... Nd5? { (9.09 → Mate in 5) Checkmate is now unavoidable. Ne8 was best. } { [%eval #5] } (25... Ne8 26. Qb7+ Nc7 27. Bb6 f6 28. Bxc7 e6 29. Bd6+ Ke8 30. c5 e5 31. Qb5+) 26. cxd5 { [%eval #4] } 26... e6 { [%eval #4] } 27. b4 { [%eval #13] } 27... exd5 { [%eval #4] } 28. b5?! { (Mate in 4 → 10.11) Lost forced checkmate sequence. Qb7+ was best. } { [%eval 10.11] } (28. Qb7+ Ke6 29. Qxd5+ Kf6 30. Qf5+ Kg7 31. Qg5#) 28... Bxc5 { [%eval 9.56] } 29. Nxd5?? { (9.56 → 1.54) Blunder. Qc6+ was best. } { [%eval 1.54] } (29. Qc6+ Ke7 30. Qxc5+ Ke8 31. Kd1 Rg8 32. Qxd5 Rg6 33. Qxe4+ Kf8 34. Qa8+ Kg7) 29... f5?? { (1.54 → Mate in 4) Checkmate is now unavoidable. Rxa8 was best. } { [%eval #4] } (29... Rxa8 30. Ke2 f5 31. h3 Kd6 32. Ne3 Bxe3 33. Kxe3 gxh3 34. Rxh3 Ke5 35. b6) 30. b6?? { (Mate in 4 → 0.57) Lost forced checkmate sequence. Qc6+ was best. } { [%eval 0.57] } (30. Qc6+ Kd8 31. Qxc5 Rf8 32. Qe7+ Kc8 33. Qc7#) 30... Bxb6?? { (0.57 → 9.75) Blunder. Rxa8 was best. } { [%eval 9.75] } (30... Rxa8 31. Ke2 Kd6 32. Ne3 f4 33. Nxg4 Bxb6 34. Rb1 Bd4 35. f3 e3 36. Kd3) 31. Nxb6+ { [%eval 9.33] } 31... Kd6 { [%eval #8] } 32. Qxh8 { [%eval 9.87] } 32... h5 { [%eval 10.35] } 33. Qxh5 { [%eval 9.95] } 33... f4? { (9.95 → Mate in 13) Checkmate is now unavoidable. Ke7 was best. } { [%eval #13] } (33... Ke7 34. Qxf5 Ke8 35. Qxg4 Kf8 36. Rg1 Kf7 37. Nd5 Ke8 38. f3 e3 39. dxe3) 34. Qxg4 { [%eval #7] } 34... e3 { [%eval #6] } 35. Qxf4+ { [%eval #6] } 35... Ke6 { [%eval #4] } 36. Qxe3+ { [%eval #5] } 36... Kf5 { [%eval #4] } 37. f4 { [%eval #5] } 37... Kg4 { [%eval #2] } 38. f5 { [%eval #4] } 38... Kxf5 { [%eval #4] } 39. h4 { [%eval #4] } 39... Kg4 { [%eval #1] } 40. h5 { [%eval #2] } 40... Kf5 { [%eval #2] } 41. h6 { [%eval #3] } 41... Kg6 { [%eval #3] } 42. h7 { [%eval #3] } 42... Kg7 { [%eval #2] } 43. h8=Q+ { [%eval #2] } 43... Kg6 { [%eval #2] } 44. Qg3+ { [%eval #2] } 44... Kf5 { [%eval #1] } 45. Qf8+ { [%eval #1] } 45... Ke4 { [%eval #1] } 46. Qe3# { White wins by checkmate. } 1-0