Event: Round 5: Krefenstein, Sergej - Niehaus, Frank
Date: 2025-04-23
White: Krefenstein, Sergej
WhiteElo: 2014
Black: Niehaus, Frank
BlackElo: 2126
Result: 1/2-1/2
ECO: B75
Opening: Sicilian Defense: Dragon Variation, Yugoslav Attack, Early Deviations
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:30:57] } 1... c5 { [%eval 0.25] [%clk 1:30:34] } 2. Nf3 { [%eval 0.2] [%clk 1:31:21] } 2... d6 { [%eval 0.31] [%clk 1:30:43] } 3. d4 { [%eval 0.22] [%clk 1:31:46] } 3... cxd4 { [%eval 0.19] [%clk 1:31:06] } 4. Nxd4 { [%eval 0.18] [%clk 1:32:13] } 4... Nf6 { [%eval 0.25] [%clk 1:31:17] } 5. Nc3 { [%eval 0.32] [%clk 1:32:39] } 5... g6 { [%eval 0.59] [%clk 1:31:33] } 6. Be3 { [%eval 0.43] [%clk 1:32:50] } 6... Bg7 { [%eval 0.46] [%clk 1:31:19] } 7. f3 { [%eval 0.32] [%clk 1:33:08] } 7... a6 { [%eval 0.59] [%clk 1:29:57] } 8. Qd2 { [%eval 0.7] [%clk 1:32:56] } 8... h5 { [%eval 0.74] [%clk 1:29:45] } 9. O-O-O { [%eval 0.38] [%clk 1:32:05] } 9... b5 { [%eval 0.21] [%clk 1:28:37] } 10. Nd5 { [%eval 0.22] [%clk 1:30:32] } 10... Bb7 { [%eval 0.23] [%clk 1:25:35] } 11. Nb6 { [%eval -0.08] [%clk 1:27:59] } 11... Qxb6 { [%eval 0.01] [%clk 1:23:53] } 12. Ne6?! { [%eval -0.99] } { Inaccuracy. Nf5 was best. } { [%clk 1:27:43] } 12... Qc6?? { [%eval 0.84] } { Blunder. Bh6 was best. } { [%clk 1:24:05] } 13. Nxg7+ { [%eval 0.7] [%clk 1:27:58] } 13... Kf8 { [%eval 0.74] [%clk 1:24:04] } 14. Bh6 { [%eval 0.84] [%clk 1:27:27] } 14... Ng8?! { [%eval 1.69] } { Inaccuracy. Kg8 was best. } { [%clk 1:09:02] } 15. Ne6+ { [%eval 1.56] [%clk 1:25:18] } 15... Ke8 { [%eval 1.49] [%clk 1:09:26] } 16. Nd4 { [%eval 1.56] [%clk 1:24:54] } 16... Qc7 { [%eval 1.53] [%clk 1:07:42] } 17. Bg5 { [%eval 1.31] [%clk 1:23:12] } 17... Nd7 { [%eval 1.27] [%clk 1:07:41] } 18. Kb1 { [%eval 1.26] [%clk 1:18:36] } 18... Rc8?! { [%eval 2.23] } { Inaccuracy. Ngf6 was best. } { [%clk 1:07:14] } 19. Bd3?! { [%eval 1.32] } { Inaccuracy. c4 was best. } { [%clk 1:06:44] } 19... Nc5 { [%eval 1.81] [%clk 1:04:24] } 20. h3 { [%eval 1.49] [%clk 1:03:15] } 20... Kf8 { [%eval 1.45] [%clk 1:01:11] } 21. c3?! { [%eval 0.67] } { Inaccuracy. Nb3 was best. } { [%clk 1:00:29] } 21... Nxd3 { [%eval 0.66] [%clk 0:58:01] } 22. Qxd3 { [%eval 0.66] [%clk 1:00:54] } 22... Qc5 { [%eval 1.17] [%clk 0:55:39] } 23. h4 { [%eval 0.88] [%clk 0:56:45] } 23... Kg7 { [%eval 0.93] [%clk 0:54:26] } 24. Nb3 { [%eval 0.41] [%clk 0:51:04] } 24... Qc4 { [%eval 0.36] [%clk 0:49:22] } 25. Qe3 { [%eval 0.49] [%clk 0:50:44] } 25... Nf6?? { [%eval 2.59] } { Blunder. f6 was best. } { [%clk 0:48:32] } 26. Na5? { [%eval 0.91] } { Mistake. Bxf6+ was best. } { [%clk 0:48:37] } 26... Qc7 { [%eval 1.0] [%clk 0:48:58] } 27. Nxb7 { [%eval 1.03] [%clk 0:46:08] } 27... Qxb7 { [%eval 0.99] [%clk 0:49:23] } 28. Bxf6+ { [%eval 0.82] [%clk 0:46:22] } 28... Kxf6 { [%eval 1.33] [%clk 0:47:02] } 29. Qd4+? { [%eval 0.0] } { Mistake. e5+ was best. } { [%clk 0:46:00] } 29... Ke6 { [%eval 0.13] [%clk 0:47:18] } 30. f4 { [%eval -0.16] [%clk 0:44:50] } 30... Qc6?! { [%eval 0.89] } { Inaccuracy. f6 was best. } { [%clk 0:45:41] } 31. f5+ { [%eval 0.91] [%clk 0:31:39] } 31... gxf5 { [%eval 0.96] [%clk 0:44:10] } 32. exf5+ { [%eval 0.97] [%clk 0:31:45] } 32... Kd7 { [%eval 0.99] [%clk 0:44:30] } 33. Rhe1 { [%eval 1.03] [%clk 0:29:48] } 33... Rhg8 { [%eval 1.26] [%clk 0:40:24] } 34. Qe5 { [%eval 1.34] [%clk 0:24:17] } 34... Rce8 { [%eval 1.36] [%clk 0:35:54] } 35. f6 { [%eval 1.36] [%clk 0:23:35] } 35... e6 { [%eval 1.77] [%clk 0:30:02] } 36. Qxh5 { [%eval 1.75] [%clk 0:21:27] } 36... Ref8 { [%eval 2.32] [%clk 0:30:24] } 37. Re2?! { [%eval 1.61] } { Inaccuracy. g4 was best. } { [%clk 0:14:00] } 37... Rg6 { [%eval 1.74] [%clk 0:26:01] } 38. Qe5 { [%eval 1.19] [%clk 0:09:35] } 38... Kc7 { [%eval 2.42] [%clk 0:17:07] } 39. Qf4 { [%eval 2.15] [%clk 0:06:28] } 39... Rfg8 { [%eval 2.35] [%clk 0:15:15] } 40. Red2 { [%eval 2.3] [%clk 0:03:45] } 40... e5 { [%eval 2.02] [%clk 0:10:43] } 41. Qf5?? { [%eval 0.0] } { Blunder. Qf2 was best. } { [%clk 0:19:08] } 41... Rxg2 { [%eval 0.0] [%clk 0:36:23] } 42. Qh7 { [%eval 0.0] [%clk 0:13:05] } 42... Rxd2 { [%eval 0.0] [%clk 0:35:07] } 43. Rxd2 { [%eval 0.0] [%clk 0:13:13] } 43... Rg1+ { [%eval -0.03] [%clk 0:33:49] } 44. Kc2 { [%eval 0.0] [%clk 0:13:38] } 44... Qc4 { [%eval 0.0] [%clk 0:32:29] } 45. b3 { [%eval 0.0] [%clk 0:13:05] } 45... Qe6 { [%eval 0.0] [%clk 0:23:54] } 1/2-1/2