Event: Round 4: Kevin Stern - Boyer-Olson, Jack
Date: 2025-04-20
White: Kevin Stern
Black: Boyer-Olson, Jack
BlackElo: 1745
Result: 0-1
ECO: D10
Opening: Slav Defense: Exchange Variation, Boor Attack
Variant: Standard
TimeControl: 90+30

1. d4 { [%eval 0.17] [%clk 1:30:05] } 1... d5 { [%eval 0.2] [%clk 1:30:47] } 2. c4 { [%eval 0.26] [%clk 1:30:31] } 2... c6 { [%eval 0.21] [%clk 1:31:13] } 3. cxd5 { [%eval 0.15] [%clk 1:30:58] } 3... cxd5 { [%eval 0.19] [%clk 1:31:35] } 4. Nc3 { [%eval 0.07] [%clk 1:31:26] } 4... Nf6 { [%eval 0.2] [%clk 1:31:53] } 5. f3 { [%eval -0.14] [%clk 1:31:54] } 5... Nc6 { [%eval 0.0] [%clk 1:32:07] } 6. e4 { [%eval 0.0] [%clk 1:32:08] } 6... e6 { [%eval 0.45] [%clk 1:32:01] } 7. e5 { [%eval 0.45] [%clk 1:32:33] } 7... Nd7 { [%eval 0.64] [%clk 1:32:24] } 8. f4 { [%eval 1.09] [%clk 1:32:58] } 8... Be7 { [%eval 1.22] [%clk 1:32:23] } 9. Nf3 { [%eval 1.11] [%clk 1:33:22] } 9... Qb6 { [%eval 1.26] [%clk 1:32:21] } 10. a3 { [%eval 1.21] [%clk 1:30:46] } 10... a5 { [%eval 1.56] [%clk 1:32:09] } 11. Be3 { [%eval 1.52] [%clk 1:29:27] } 11... f5?! { [%eval 2.13] } { Inaccuracy. Qd8 was best. } { [%clk 1:31:25] } 12. Bd3 { [%eval 1.88] [%clk 1:26:36] } 12... Nf8 { [%eval 2.24] [%clk 1:29:03] } 13. O-O { [%eval 2.19] [%clk 1:24:14] } 13... Ng6 { [%eval 2.27] [%clk 1:28:19] } 14. Na4 { [%eval 1.8] [%clk 1:16:15] } 14... Qc7 { [%eval 1.79] [%clk 1:26:54] } 15. Rc1 { [%eval 1.95] [%clk 1:15:56] } 15... O-O { [%eval 1.84] [%clk 1:24:21] } 16. Qb3 { [%eval 1.4] [%clk 1:12:25] } 16... Bd8 { [%eval 1.61] [%clk 1:24:49] } 17. Rc2 { [%eval 1.4] [%clk 1:10:05] } 17... Qe7 { [%eval 1.34] [%clk 1:17:33] } 18. Rfc1 { [%eval 1.35] [%clk 1:04:02] } 18... Nh4 { [%eval 1.47] [%clk 1:14:03] } 19. Nxh4 { [%eval 1.35] [%clk 1:04:02] } 19... Qxh4 { [%eval 1.35] [%clk 1:14:18] } 20. Nb6 { [%eval 1.16] [%clk 1:01:41] } 20... a4?! { [%eval 2.04] } { Inaccuracy. Bxb6 was best. } { [%clk 1:00:49] } 21. Nxa4 { [%eval 2.17] [%clk 0:59:05] } 21... g5 { [%eval 2.25] [%clk 1:00:24] } 22. g3 { [%eval 1.98] [%clk 0:55:39] } 22... Qh3 { [%eval 2.5] [%clk 0:58:23] } 23. Bf1 { [%eval 2.44] [%clk 0:45:45] } 23... Qg4 { [%eval 2.47] [%clk 0:58:36] } 24. Be2 { [%eval 2.47] [%clk 0:46:08] } 24... Qh3 { [%eval 2.42] [%clk 0:58:52] } 25. Bf1 { [%eval 2.33] [%clk 0:46:35] } 25... Qg4 { [%eval 2.46] [%clk 0:59:12] } 26. Rf2 { [%eval 2.36] [%clk 0:44:24] } 26... h5?! { [%eval 3.4] } { Inaccuracy. gxf4 was best. } { [%clk 0:57:43] } 27. Kg2?! { [%eval 2.28] } { Inaccuracy. Be2 was best. } { [%clk 0:39:45] } 27... gxf4 { [%eval 2.19] [%clk 0:55:16] } 28. Rxf4 { [%eval 2.23] [%clk 0:40:09] } 28... Qg7 { [%eval 2.16] [%clk 0:54:09] } 29. Nb6 { [%eval 2.16] [%clk 0:39:26] } 29... Rb8 { [%eval 2.37] [%clk 0:54:12] } 30. Nxc8 { [%eval 1.99] [%clk 0:36:17] } 30... Rxc8 { [%eval 1.9] [%clk 0:54:28] } 31. Qd1? { [%eval 0.35] } { Mistake. h4 was best. } { [%clk 0:34:02] } 31... Bg5 { [%eval 0.34] [%clk 0:46:14] } 32. Rf3 { [%eval 0.26] [%clk 0:30:26] } 32... f4? { [%eval 1.81] } { Mistake. Bxe3 was best. } { [%clk 0:45:33] } 33. gxf4?! { [%eval 1.11] } { Inaccuracy. Bg1 was best. } { [%clk 0:24:48] } 33... Bxf4+ { [%eval 1.07] [%clk 0:43:47] } 34. Kh1 { [%eval 1.04] [%clk 0:24:28] } 34... Qh6?? { [%eval 3.21] } { Blunder. Bxe3 was best. } { [%clk 0:38:03] } 35. Bxf4 { [%eval 3.17] [%clk 0:21:30] } 35... Rxf4 { [%eval 2.91] [%clk 0:38:29] } 36. Rxf4?? { [%eval 0.7] } { Blunder. Qd2 was best. } { [%clk 0:21:31] } 36... Qxf4 { [%eval 0.83] [%clk 0:38:51] } 37. Qxh5?? { [%eval -5.12] } { Blunder. Bh3 was best. } { [%clk 0:21:09] } 37... Qxc1 { [%eval -5.23] [%clk 0:39:05] } 38. Qg6+ { [%eval -5.21] [%clk 0:19:53] } 38... Kf8 { [%eval -5.04] [%clk 0:39:26] } 39. Qf6+ { [%eval -5.16] [%clk 0:18:06] } 39... Ke8 { [%eval -5.08] [%clk 0:39:54] } 40. Qxe6+ { [%eval -5.08] [%clk 0:18:00] } 40... Ne7 { [%eval -5.24] [%clk 0:40:20] } 41. Qf6 { [%eval -5.15] [%clk 0:18:03] } 41... Rc6 { [%eval -5.17] [%clk 0:40:21] } 42. Qf3 { [%eval -5.05] [%clk 0:16:38] } 42... Qb1 { [%eval -4.86] [%clk 0:39:59] } 43. h4 { [%eval -5.13] [%clk 0:15:28] } 43... Rc1 { [%eval -5.03] [%clk 0:39:54] } 44. Kg1 { [%eval -5.04] [%clk 0:15:55] } 44... Qf5 { [%eval -4.93] [%clk 0:40:14] } 45. Qe2?! { [%eval -7.31] } { Inaccuracy. Qxf5 was best. } { [%clk 0:15:42] } 45... Ng6 { [%eval -5.96] [%clk 0:39:56] } 46. Qb5+?! { [%eval -8.39] } { Inaccuracy. Qg2 was best. } { [%clk 0:15:52] } 46... Qd7? { [%eval -4.17] } { Mistake. Kf8 was best. } { [%clk 0:40:24] } 47. Qxd7+ { [%eval -4.28] [%clk 0:14:03] } 47... Kxd7 { [%eval -4.67] [%clk 0:40:52] } 48. h5 { [%eval -4.86] [%clk 0:14:32] } 48... Nf4 { [%eval -4.92] [%clk 0:40:41] } 49. h6 { [%eval -4.87] [%clk 0:14:52] } 49... Rc8 { [%eval -4.88] [%clk 0:40:53] } 50. Kf2 { [%eval -4.95] [%clk 0:14:27] } 50... Rh8 { [%eval -4.97] [%clk 0:41:17] } 51. Ke3 { [%eval -4.96] [%clk 0:14:09] } 51... Ne6 { [%eval -5.01] [%clk 0:41:34] } 52. Bg2 { [%eval -4.9] [%clk 0:14:35] } 52... Rxh6 { [%eval -4.44] [%clk 0:41:51] } 53. Bxd5 { [%eval -4.47] [%clk 0:14:58] } 53... Rh3+ { [%eval -4.25] [%clk 0:42:17] } 54. Ke4 { [%eval -4.33] [%clk 0:15:07] } 54... Rh4+ { [%eval -4.61] [%clk 0:42:42] } 55. Ke3 { [%eval -4.59] [%clk 0:15:36] } 55... Nxd4?! { [%eval -3.45] } { Inaccuracy. b6 was best. } { [%clk 0:42:52] } 56. Bxb7 { [%eval -3.34] [%clk 0:16:04] } 56... Ke6 { [%eval -3.36] [%clk 0:43:13] } 57. Kd3 { [%eval -3.18] [%clk 0:15:03] } 57... Kxe5 { [%eval -3.33] [%clk 0:43:34] } 58. Kd2 { [%eval -3.91] [%clk 0:14:46] } 58... Rh2+ { [%eval -3.46] [%clk 0:43:54] } 59. Kc1?? { [%eval #-19] } { Checkmate is now unavoidable. Kd3 was best. } { [%clk 0:15:14] } 59... Nb3+ { [%eval #-18] [%clk 0:44:04] } 60. Kb1 { [%eval #-19] [%clk 0:15:36] } 60... Kd4?? { [%eval -6.81] } { Lost forced checkmate sequence. Nc5 was best. } { [%clk 0:44:28] } 61. Bc8?? { [%eval #-13] } { Checkmate is now unavoidable. Bc6 was best. } { [%clk 0:13:11] } 61... Nd2+ { [%eval #-12] [%clk 0:44:53] } 62. Ka1 { [%eval #-10] [%clk 0:12:25] } 62... Nc4 { [%eval #-9] [%clk 0:45:11] } 63. a4 { [%eval #-9] [%clk 0:12:49] } 63... Rxb2 { [%eval #-8] [%clk 0:45:33] } 64. a5 { [%eval #-6] [%clk 0:13:13] } 64... Rb8 { [%eval #-7] [%clk 0:45:53] } 0-1