Event: Round 7: Klenburg, Michael - Krefenstein, Sergej
Date: 2025-04-25
White: Klenburg, Michael
WhiteTitle: IM
WhiteElo: 2338
Black: Krefenstein, Sergej
BlackElo: 2014
Result: 1-0
ECO: A07
Opening: King's Indian Attack: Keres Variation
Variant: Standard

1. g3 { [%eval 0.0] [%clk 1:30:49] } 1... d5 { [%eval 0.15] [%clk 1:30:44] } 2. Nf3 { [%eval 0.15] [%clk 1:30:45] } 2... Bg4 { [%eval 0.24] [%clk 1:30:20] } 3. Bg2 { [%eval 0.14] [%clk 1:30:46] } 3... Nf6 { [%eval 0.32] [%clk 1:29:34] } 4. d3 { [%eval 0.06] [%clk 1:28:54] } 4... c6 { [%eval 0.15] [%clk 1:29:20] } 5. h3 { [%eval 0.09] [%clk 1:28:16] } 5... Bh5 { [%eval 0.14] [%clk 1:29:30] } 6. g4 { [%eval 0.0] [%clk 1:27:00] } 6... Bg6 { [%eval 0.06] [%clk 1:29:54] } 7. Ne5 { [%eval -0.21] [%clk 1:25:54] } 7... Nbd7 { [%eval -0.15] [%clk 1:29:48] } 8. Nxg6 { [%eval -0.19] [%clk 1:26:43] } 8... hxg6 { [%eval -0.26] [%clk 1:30:10] } 9. e3 { [%eval -0.42] [%clk 1:26:55] } 9... e6 { [%eval -0.24] [%clk 1:26:42] } 10. Nd2 { [%eval -0.31] [%clk 1:22:52] } 10... Qc7 { [%eval 0.05] [%clk 1:22:35] } 11. Nf3 { [%eval -0.3] [%clk 1:22:11] } 11... Bd6 { [%eval -0.22] [%clk 1:21:48] } 12. Bd2 { [%eval -0.17] [%clk 1:20:48] } 12... a5 { [%eval -0.06] [%clk 1:15:19] } 13. Qe2 { [%eval -0.26] [%clk 1:18:15] } 13... e5 { [%eval -0.27] [%clk 1:06:17] } 14. Ng5 { [%eval -0.24] [%clk 1:17:22] } 14... Nh7?! { [%eval 0.35] } { Inaccuracy. Nc5 was best. } { [%clk 1:02:43] } 15. Nxh7 { [%eval 0.28] [%clk 1:16:12] } 15... Rxh7 { [%eval 0.3] [%clk 1:03:08] } 16. O-O-O { [%eval 0.32] [%clk 1:15:58] } 16... O-O-O { [%eval 0.3] [%clk 1:01:49] } 17. Kb1 { [%eval 0.29] [%clk 1:15:25] } 17... a4 { [%eval 0.19] [%clk 0:56:51] } 18. Qe1 { [%eval -0.1] [%clk 1:12:34] } 18... Re8?! { [%eval 0.65] } { Inaccuracy. a3 was best. } { [%clk 0:54:17] } 19. Ba5 { [%eval 0.68] [%clk 1:11:34] } 19... b6 { [%eval 0.71] [%clk 0:52:42] } 20. Bd2 { [%eval 0.5] [%clk 1:11:53] } 20... a3 { [%eval 0.63] [%clk 0:52:42] } 21. b3 { [%eval 0.5] [%clk 1:12:16] } 21... Kb7 { [%eval 0.69] [%clk 0:50:31] } 22. c4 { [%eval 0.65] [%clk 1:10:32] } 22... e4?? { [%eval 2.84] } { Blunder. dxc4 was best. } { [%clk 0:47:32] } 23. cxd5 { [%eval 2.82] [%clk 1:10:08] } 23... cxd5?! { [%eval 3.73] } { Inaccuracy. f5 was best. } { [%clk 0:47:48] } 24. Rc1 { [%eval 3.59] [%clk 1:09:17] } 24... Qb8 { [%eval 3.96] [%clk 0:46:23] } 25. d4? { [%eval 2.29] } { Mistake. dxe4 was best. } { [%clk 1:06:46] } 25... Be7 { [%eval 2.84] [%clk 0:37:58] } 26. Bb4?! { [%eval 1.98] } { Inaccuracy. Bf1 was best. } { [%clk 1:01:08] } 26... Bxb4? { [%eval 4.13] } { Mistake. Qd8 was best. } { [%clk 0:30:23] } 27. Qxb4 { [%eval 4.37] [%clk 1:01:28] } 27... Re6 { [%eval 4.31] [%clk 0:30:49] } 28. Rc2 { [%eval 3.92] [%clk 0:57:43] } 28... Qd6 { [%eval 3.94] [%clk 0:24:43] } 29. Qa4 { [%eval 3.84] [%clk 0:57:49] } 29... Rh8 { [%eval 4.02] [%clk 0:23:03] } 30. Rhc1 { [%eval 4.18] [%clk 0:57:55] } 30... Nb8 { [%eval 4.23] [%clk 0:22:33] } 31. Bf1 { [%eval 4.0] [%clk 0:55:49] } 31... Ree8 { [%eval 4.55] [%clk 0:18:24] } 32. Rc7+ { [%eval 4.52] [%clk 0:48:23] } 32... Qxc7 { [%eval 4.46] [%clk 0:18:29] } 33. Rxc7+ { [%eval 4.62] [%clk 0:48:47] } 33... Kxc7 { [%eval 4.43] [%clk 0:18:56] } 34. Qa7+ { [%eval 4.32] [%clk 0:49:03] } 34... Kc6?? { [%eval #18] } { Checkmate is now unavoidable. Kc8 was best. } { [%clk 0:17:55] } 35. b4?? { [%eval 3.42] } { Lost forced checkmate sequence. Bb5+ was best. } { [%clk 0:48:13] } 35... Nd7 { [%eval 3.29] [%clk 0:17:06] } 36. Bb5+?? { [%eval 0.46] } { Blunder. Ba6 was best. } { [%clk 0:44:04] } 36... Kxb5 { [%eval 0.35] [%clk 0:16:26] } 37. Qxd7+ { [%eval 0.43] [%clk 0:44:27] } 37... Kxb4 { [%eval 0.55] [%clk 0:14:41] } 38. Qxd5 { [%eval 0.58] [%clk 0:44:30] } 38... Re6?? { [%eval 3.3] } { Blunder. Rc8 was best. } { [%clk 0:10:50] } 39. Qb3+ { [%eval 3.62] [%clk 0:44:14] } 39... Ka5 { [%eval 3.58] [%clk 0:11:15] } 40. Qxa3+ { [%eval 3.78] [%clk 0:44:25] } 40... Kb5 { [%eval 3.69] [%clk 0:11:38] } 41. Qb3+ { [%eval 3.53] [%clk 0:41:54] } 41... Ka5 { [%eval 3.85] [%clk 0:08:15] } 42. Qc4?! { [%eval 2.5] } { Inaccuracy. d5 was best. } { [%clk 0:38:44] } 42... b5 { [%eval 2.99] [%clk 0:07:31] } 43. Qc7+ { [%eval 2.32] [%clk 0:39:00] } 43... Rb6?! { [%eval 3.14] } { Inaccuracy. Ka6 was best. } { [%clk 0:04:49] } 44. Qa7+ { [%eval 2.89] [%clk 0:32:38] } 44... Ra6 { [%eval 3.06] [%clk 0:02:22] } 45. Qc5 { [%eval 3.13] [%clk 0:32:33] } 45... Rxh3?! { [%eval 4.56] } { Inaccuracy. Raa8 was best. } { [%clk 0:29:40] } 46. Qc7+ { [%eval 4.39] [%clk 0:54:05] } 46... Ka4 { [%eval 4.45] [%clk 0:26:30] } 47. Qc2+ { [%eval 4.28] [%clk 0:51:58] } 47... Ka5 { [%eval 3.91] [%clk 0:26:09] } 48. d5?! { [%eval 2.93] } { Inaccuracy. Qc7+ was best. } { [%clk 0:50:28] } 48... Rf3? { [%eval 5.03] } { Mistake. Rh1+ was best. } { [%clk 0:22:34] } 49. Qd2+ { [%eval 5.07] [%clk 0:49:39] } 49... Kb6 { [%eval 4.99] [%clk 0:20:55] } 50. d6 { [%eval 4.97] [%clk 0:49:32] } 50... Ra8 { [%eval 5.91] [%clk 0:20:55] } 51. Qd4+ { [%eval 5.92] [%clk 0:49:51] } 51... Ka6?! { [%eval 8.01] } { Inaccuracy. Kc6 was best. } { [%clk 0:17:08] } 52. Qxe4 { [%eval 7.52] [%clk 0:50:02] } 1-0