Event: Biel Chess Festival 2025 MTO
Site: Biel, Switzerland
Date: 2025-07-19
White: Schaffner, David
WhiteElo: 1980
Black: Yu, Tianxiang Carlos
BlackElo: 1938
Result: 1/2-1/2
ECO: B97
Opening: Sicilian Defense: Najdorf Variation, Poisoned Pawn Accepted
Variant: Standard
TimeControl: 100 min 40 moves + 30 min Rest + 30 sec per move

1. e4 { [%eval 0.18] [%clk 1:40:54] } 1... c5 { [%eval 0.25] [%clk 1:37:07] } 2. Nf3 { [%eval 0.2] [%clk 1:41:02] } 2... d6 { [%eval 0.31] [%clk 1:37:33] } 3. d4 { [%eval 0.22] [%clk 1:41:00] } 3... cxd4 { [%eval 0.19] [%clk 1:37:59] } 4. Nxd4 { [%eval 0.18] [%clk 1:41:11] } 4... Nf6 { [%eval 0.31] [%clk 1:38:24] } 5. Nc3 { [%eval 0.32] [%clk 1:41:01] } 5... a6 { [%eval 0.28] [%clk 1:38:50] } 6. Bg5 { [%eval 0.0] [%clk 1:40:48] } 6... e6 { [%eval 0.17] [%clk 1:39:14] } 7. f4 { [%eval 0.04] [%clk 1:40:32] } 7... Qb6 { [%eval 0.08] [%clk 1:39:37] } 8. Qd2 { [%eval 0.45] [%clk 1:29:04] } 8... Qxb2 { [%eval 0.45] [%clk 1:40:03] } 9. Rb1 { [%eval 0.43] [%clk 1:29:25] } 9... Qa3 { [%eval 0.41] [%clk 1:40:32] } 10. Bxf6?! { [%eval -0.28] } { Inaccuracy. f5 was best. } { [%clk 1:14:45] } 10... gxf6 { [%eval -0.2] [%clk 1:41:00] } 11. Be2 { [%eval -0.26] [%clk 1:08:19] } 11... Be7 { [%eval -0.32] [%clk 1:33:29] } 12. O-O { [%eval -0.37] [%clk 0:56:44] } 12... Nc6 { [%eval -0.28] [%clk 1:17:55] } 13. Nxc6 { [%eval -0.27] [%clk 0:39:44] } 13... bxc6 { [%eval -0.23] [%clk 1:18:24] } 14. Rb3 { [%eval -0.57] [%clk 0:36:37] } 14... Qa5 { [%eval -0.59] [%clk 1:18:13] } 15. f5 { [%eval -0.63] [%clk 0:34:14] } 15... h5 { [%eval -0.55] [%clk 1:02:29] } 16. Kh1 { [%eval -0.43] [%clk 0:29:05] } 16... Kf8 { [%eval -0.55] [%clk 0:33:57] } 17. Qf4 { [%eval -0.64] [%clk 0:24:26] } 17... Qe5 { [%eval -0.43] [%clk 0:32:49] } 18. Qxe5 { [%eval -0.54] [%clk 0:24:28] } 18... fxe5 { [%eval -0.39] [%clk 0:25:47] } 19. Na4 { [%eval -0.55] [%clk 0:22:13] } 19... Kg7?? { [%eval 2.87] } { Blunder. Bd8 was best. } { [%clk 0:16:07] } 20. Rg3+?? { [%eval 0.52] } { Blunder. Nb6 was best. } { [%clk 0:18:26] } 20... Kf8?? { [%eval 2.42] } { Blunder. Kf6 was best. } { [%clk 0:08:03] } 21. Nb6 { [%eval 2.1] [%clk 0:17:25] } 21... Rb8 { [%eval 2.57] [%clk 0:08:17] } 22. Nxc8 { [%eval 2.53] [%clk 0:17:34] } 22... Rxc8 { [%eval 2.29] [%clk 0:08:43] } 23. fxe6 { [%eval 2.33] [%clk 0:17:52] } 23... f6 { [%eval 2.06] [%clk 0:09:05] } 24. Bxa6 { [%eval 2.01] [%clk 0:14:02] } 24... Ra8 { [%eval 2.05] [%clk 0:09:28] } 25. Bc4 { [%eval 2.04] [%clk 0:13:58] } 25... Rg8 { [%eval 2.18] [%clk 0:09:33] } 26. Rxg8+ { [%eval 1.97] [%clk 0:13:34] } 26... Kxg8 { [%eval 2.16] [%clk 0:10:02] } 27. Bb3 { [%eval 2.22] [%clk 0:13:37] } 27... Kg7 { [%eval 2.52] [%clk 0:09:59] } 28. g3 { [%eval 2.3] [%clk 0:13:26] } 28... Ra5 { [%eval 2.69] [%clk 0:10:18] } 29. c4 { [%eval 3.0] [%clk 0:10:04] } 29... Ra8 { [%eval 2.77] [%clk 0:09:56] } 30. Kg2 { [%eval 2.77] [%clk 0:10:19] } 30... Bd8 { [%eval 3.01] [%clk 0:09:29] } 31. Rd1 { [%eval 2.87] [%clk 0:09:25] } 31... Be7 { [%eval 2.85] [%clk 0:09:56] } 32. Rd2 { [%eval 2.81] [%clk 0:07:18] } 32... Kg6?! { [%eval 3.85] } { Inaccuracy. Ra5 was best. } { [%clk 0:09:35] } 33. Rf2?! { [%eval 2.93] } { Inaccuracy. c5 was best. } { [%clk 0:05:49] } 33... Rh8 { [%eval 2.82] [%clk 0:09:21] } 34. h4 { [%eval 2.84] [%clk 0:04:30] } 34... Bd8?! { [%eval 4.45] } { Inaccuracy. Ra8 was best. } { [%clk 0:09:01] } 35. Rf5?! { [%eval 2.82] } { Inaccuracy. Ba4 was best. } { [%clk 0:03:48] } 35... Bb6?! { [%eval 3.95] } { Inaccuracy. Be7 was best. } { [%clk 0:07:59] } 36. Kf1?! { [%eval 2.57] } { Inaccuracy. Bd1 was best. } { [%clk 0:03:29] } 36... Bc5 { [%eval 2.97] [%clk 0:07:23] } 37. Ke1 { [%eval 2.73] [%clk 0:02:51] } 37... Re8 { [%eval 2.84] [%clk 0:06:56] } 38. Ba4 { [%eval 2.47] [%clk 0:01:25] } 38... Rxe6 { [%eval 2.69] [%clk 0:07:24] } 39. Bxc6 { [%eval 2.92] [%clk 0:01:46] } 39... Re7 { [%eval 2.85] [%clk 0:07:29] } 40. a4 { [%eval 2.67] [%clk 0:01:25] } 40... Bb4+ { [%eval 2.7] [%clk 0:06:09] } 41. Ke2 { [%eval 2.51] [%clk 0:24:12] } 41... Bc3?! { [%eval 3.81] } { Inaccuracy. Rc7 was best. } { [%clk 0:36:19] } 42. Rf3 { [%eval 3.78] [%clk 0:19:35] } 42... Ba5 { [%eval 3.84] [%clk 0:35:21] } 43. Bb5?! { [%eval 2.66] } { Inaccuracy. Rd3 was best. } { [%clk 0:12:30] } 43... Bb4 { [%eval 2.67] [%clk 0:35:02] } 44. Kf1 { [%eval 2.86] [%clk 0:10:40] } 44... Bd2 { [%eval 3.15] [%clk 0:32:49] } 45. Kg2 { [%eval 3.05] [%clk 0:08:55] } 45... Be1 { [%eval 3.19] [%clk 0:31:48] } 46. Kh3 { [%eval 3.33] [%clk 0:08:53] } 46... Ba5 { [%eval 3.91] [%clk 0:32:01] } 47. g4 { [%eval 3.87] [%clk 0:02:51] } 47... hxg4+ { [%eval 3.74] } 48. Kxg4 { [%eval 3.56] [%clk 0:02:48] } 48... Rg7 { [%eval 3.4] [%clk 0:32:01] } 1/2-1/2