Event: Round 1: O`brien, Jer - Semenov, Igor
Date: 2025-07-28
White: O`brien, Jer
Black: Semenov, Igor
BlackElo: 1957
Result: 1/2-1/2
ECO: B12
Opening: Caro-Kann Defense: Advance Variation, Short Variation
Variant: Standard

1. e4 { [%eval 0.18] [%clk 1:30:57] } 1... c6 { [%eval 0.23] [%clk 1:30:54] } 2. d4 { [%eval 0.24] [%clk 1:31:23] } 2... d5 { [%eval 0.24] [%clk 1:31:19] } 3. e5 { [%eval 0.33] [%clk 1:31:38] } 3... Bf5 { [%eval 0.22] [%clk 1:31:41] } 4. Nf3 { [%eval 0.15] [%clk 1:31:56] } 4... e6 { [%eval 0.24] [%clk 1:32:04] } 5. Bd3 { [%eval 0.07] [%clk 1:31:45] } 5... Bxd3 { [%eval 0.0] [%clk 1:32:17] } 6. Qxd3 { [%eval 0.03] [%clk 1:32:08] } 6... Nd7 { [%eval 0.28] [%clk 1:32:35] } 7. O-O { [%eval 0.21] [%clk 1:30:56] } 7... Ne7 { [%eval 0.31] [%clk 1:31:31] } 8. Bf4 { [%eval 0.0] [%clk 1:30:42] } 8... Qb6 { [%eval 0.25] [%clk 1:26:38] } 9. b3 { [%eval -0.25] [%clk 1:17:55] } 9... c5 { [%eval -0.29] [%clk 1:21:14] } 10. c3 { [%eval -0.27] [%clk 1:14:14] } 10... Nc6 { [%eval -0.27] [%clk 1:20:45] } 11. Nbd2 { [%eval -0.22] [%clk 1:11:43] } 11... cxd4 { [%eval -0.28] [%clk 1:16:02] } 12. cxd4 { [%eval -0.26] [%clk 1:11:32] } 12... Rc8 { [%eval 0.06] [%clk 1:13:33] } 13. Rac1?! { [%eval -0.51] } { Inaccuracy. a3 was best. } { [%clk 1:09:47] } 13... Ba3 { [%eval -0.59] [%clk 1:11:58] } 14. Rcd1 { [%eval -0.77] [%clk 0:57:01] } 14... h6?! { [%eval -0.14] } { Inaccuracy. Nb4 was best. } { [%clk 1:06:18] } 15. Nb1 { [%eval -0.17] [%clk 0:54:35] } 15... Be7 { [%eval -0.2] [%clk 1:05:17] } 16. Nc3 { [%eval -0.21] [%clk 0:47:33] } 16... a6 { [%eval -0.1] [%clk 1:00:23] } 17. Na4 { [%eval -0.4] [%clk 0:44:13] } 17... Qa7 { [%eval -0.13] [%clk 0:56:30] } 18. Rfe1 { [%eval -0.3] [%clk 0:42:13] } 18... b5 { [%eval -0.16] [%clk 0:54:52] } 19. Nc3? { [%eval -1.43] } { Mistake. Nb2 was best. } { [%clk 0:41:32] } 19... Nb6?? { [%eval 0.46] } { Blunder. g5 was best. } { [%clk 0:45:52] } 20. Re2?! { [%eval -0.1] } { Inaccuracy. Rf1 was best. } { [%clk 0:38:25] } 20... Qb7 { [%eval 0.22] [%clk 0:39:32] } 21. Nd2?? { [%eval -1.6] } { Blunder. Rb2 was best. } { [%clk 0:33:30] } 21... Bb4? { [%eval -0.06] } { Mistake. g5 was best. } { [%clk 0:35:29] } 22. Rc1 { [%eval -0.45] [%clk 0:32:09] } 22... Ba3 { [%eval -0.05] [%clk 0:34:37] } 23. Rd1 { [%eval -0.19] [%clk 0:31:21] } 23... Nb4?! { [%eval 0.37] } { Inaccuracy. Be7 was best. } { [%clk 0:32:48] } 24. Qg3?! { [%eval -0.22] } { Inaccuracy. Qf3 was best. } { [%clk 0:29:49] } 24... g5 { [%eval -0.22] [%clk 0:26:07] } 25. Be3 { [%eval -0.17] [%clk 0:19:55] } 25... Bb2?! { [%eval 0.67] } { Inaccuracy. Rxc3 was best. } { [%clk 0:25:22] } 26. Ncb1 { [%eval 0.57] [%clk 0:18:29] } 26... Nxa2 { [%eval 0.99] [%clk 0:21:36] } 27. Nf3 { [%eval 0.98] [%clk 0:17:52] } 27... Nc3 { [%eval 0.88] [%clk 0:21:26] } 28. Nxc3 { [%eval 0.9] [%clk 0:17:04] } 28... Bxc3 { [%eval 0.77] [%clk 0:21:38] } 29. h4 { [%eval 0.76] [%clk 0:16:26] } 29... g4? { [%eval 2.28] } { Mistake. Qe7 was best. } { [%clk 0:16:49] } 30. Qxg4 { [%eval 2.19] [%clk 0:16:33] } 30... Ke7? { [%eval 4.0] } { Mistake. Qe7 was best. } { [%clk 0:16:14] } 31. Bxh6 { [%eval 4.16] [%clk 0:16:14] } 31... Rcg8 { [%eval 4.12] [%clk 0:15:32] } 32. Bg5+ { [%eval 4.05] [%clk 0:16:06] } 32... Ke8 { [%eval 4.24] [%clk 0:15:58] } 33. Qf4 { [%eval 4.31] [%clk 0:14:28] } 33... Nd7 { [%eval 4.78] [%clk 0:15:13] } 34. Rc2 { [%eval 4.72] [%clk 0:13:08] } 34... b4 { [%eval 4.68] [%clk 0:15:19] } 35. Nh2 { [%eval 3.94] [%clk 0:11:02] } 35... Qc7 { [%eval 3.93] [%clk 0:14:16] } 36. Ng4 { [%eval 3.65] [%clk 0:10:19] } 36... Rg6 { [%eval 4.38] [%clk 0:13:54] } 37. Nh6?? { [%eval -0.51] } { Blunder. Rd3 was best. } { [%clk 0:09:48] } 37... Nf8?? { [%eval 4.56] } { Blunder. f6 was best. } { [%clk 0:12:26] } 38. h5 { [%eval 4.48] [%clk 0:09:42] } 38... Rxg5 { [%eval 4.64] [%clk 0:12:10] } 39. Qxg5 { [%eval 4.43] [%clk 0:09:42] } 39... Qe7 { [%eval 4.43] [%clk 0:12:27] } 40. Qxe7+ { [%eval 4.14] [%clk 0:08:50] } 40... Kxe7 { [%eval 4.06] [%clk 0:12:48] } 41. Ng4 { [%eval 3.98] [%clk 0:09:07] } 41... Rxh5 { [%eval 4.02] [%clk 0:12:45] } 42. Ra2 { [%eval 4.05] [%clk 0:08:09] } 42... Rg5 { [%eval 4.21] [%clk 0:10:55] } 43. f3 { [%eval 4.18] [%clk 0:07:47] } 43... Rf5 { [%eval 4.6] [%clk 0:10:52] } 44. Rxa6 { [%eval 4.45] [%clk 0:07:12] } 44... Rf4 { [%eval 5.58] [%clk 0:11:14] } 45. Ra7+ { [%eval 5.61] [%clk 0:06:58] } 45... Nd7 { [%eval 6.02] [%clk 0:10:49] } 46. Nf6 { [%eval 5.79] [%clk 0:06:59] } 46... Bxd4+ { [%eval 6.92] [%clk 0:11:10] } 47. Rxd4 { [%eval 6.47] [%clk 0:07:10] } 47... Rxd4?? { [%eval #8] } { Checkmate is now unavoidable. Rxf6 was best. } { [%clk 0:11:29] } 48. Rxd7+ { [%eval #7] [%clk 0:05:16] } 48... Kf8 { [%eval #7] [%clk 0:11:46] } 49. Nh7+?? { [%eval 4.69] } { Lost forced checkmate sequence. Rd8+ was best. } { [%clk 0:05:43] } 49... Kg8? { [%eval 8.41] } { Mistake. Kg7 was best. } { [%clk 0:12:02] } 50. Nf6+ { [%eval 6.73] [%clk 0:06:03] } 50... Kg7 { [%eval 5.08] [%clk 0:12:10] } 51. Ne8+ { [%eval 4.84] [%clk 0:05:43] } 51... Kg6 { [%eval 4.56] [%clk 0:12:10] } 52. Nd6 { [%eval 4.98] [%clk 0:05:03] } 52... Rd3 { [%eval 5.66] [%clk 0:12:06] } 53. Rxf7 { [%eval 5.58] [%clk 0:05:03] } 53... Rxb3 { [%eval 5.46] [%clk 0:12:20] } 54. Rf6+ { [%eval 5.17] [%clk 0:05:25] } 54... Kh5?? { [%eval #5] } { Checkmate is now unavoidable. Kh7 was best. } { [%clk 0:11:17] } 55. g4+?? { [%eval 5.0] } { Lost forced checkmate sequence. Nf7 was best. } { [%clk 0:05:21] } 55... Kh4 { [%eval 5.19] [%clk 0:11:36] } 56. Rxe6 { [%eval 4.93] [%clk 0:04:16] } 56... Rb2?! { [%eval 6.9] } { Inaccuracy. Rxf3 was best. } { [%clk 0:11:01] } 57. Nf5+ { [%eval 6.87] [%clk 0:04:14] } 57... Kg5 { [%eval 6.58] [%clk 0:11:06] } 58. Nd4?! { [%eval 5.03] } { Inaccuracy. Rb6 was best. } { [%clk 0:04:04] } 58... Rd2 { [%eval 5.09] [%clk 0:10:46] } 59. Nb3 { [%eval 4.64] [%clk 0:04:11] } 59... Rd3 { [%eval 4.2] [%clk 0:10:12] } 60. Nc5 { [%eval 3.85] [%clk 0:04:25] } 60... Rc3 { [%eval 4.49] [%clk 0:09:58] } 61. Na6 { [%eval 4.08] [%clk 0:04:03] } 61... b3 { [%eval 3.92] [%clk 0:09:49] } 62. Rb6 { [%eval 3.96] [%clk 0:04:24] } 62... Kf4 { [%eval 4.08] [%clk 0:09:27] } 63. Kg2 { [%eval 3.77] [%clk 0:03:09] } 63... Rc2+ { [%eval 4.67] [%clk 0:09:21] } 64. Kh3 { [%eval 4.92] [%clk 0:03:24] } 64... b2 { [%eval 5.28] [%clk 0:07:58] } 65. Nb4 { [%eval 5.14] [%clk 0:03:18] } 65... Rd2 { [%eval 4.96] [%clk 0:07:34] } 66. Nxd5+ { [%eval 4.96] [%clk 0:01:47] } 66... Rxd5 { [%eval 4.9] [%clk 0:07:53] } 67. Rxb2 { [%eval 5.15] [%clk 0:02:10] } 67... Kxf3 { [%eval 4.87] [%clk 0:07:06] } 68. Rb3+ { [%eval 4.8] [%clk 0:02:03] } 68... Kf4 { [%eval 4.37] [%clk 0:07:26] } 69. e6 { [%eval 4.35] [%clk 0:01:43] } 69... Re5 { [%eval 4.77] [%clk 0:07:38] } 70. Rb6?? { [%eval 0.0] } { Blunder. Kh4 was best. } { [%clk 0:01:46] } 70... Kg5 { [%eval 0.02] [%clk 0:08:01] } 71. Ra6 { [%eval 0.0] [%clk 0:01:30] } 71... Re3+ { [%eval 0.0] [%clk 0:08:17] } 72. Kg2 { [%eval 0.0] [%clk 0:01:48] } 72... Kxg4 { [%eval 0.0] [%clk 0:08:38] } 73. Kf2 { [%eval 0.0] [%clk 0:01:29] } 73... Re5 { [%eval 0.0] [%clk 0:09:00] } 74. Rb6 { [%eval 0.0] [%clk 0:01:13] } 1/2-1/2