Event: Round 1: Isaev, Yuriy V - Van der Werf, Mark
Site: https://lichess.org/broadcast/fide-world-senior-championship-2025--open-50/round-1/eOeXvkzD/4Am9GF2o
Date: 2025-10-21
White: Isaev, Yuriy V
WhiteElo: 2042
Black: Van der Werf, Mark
BlackTitle: IM
BlackElo: 2395
Result: 0-1
ECO: A13
Opening: English Opening: Neo-Catalan
Variant: Standard

1. Nf3 { [%eval 0.1] [%clk 1:30:54] } 1... Nf6 { [%eval 0.18] [%clk 1:30:54] } 2. c4 { [%eval 0.12] [%clk 1:31:16] } 2... e6 { [%eval 0.21] [%clk 1:31:18] } 3. g3 { [%eval 0.1] [%clk 1:31:29] } 3... d5 { [%eval 0.17] [%clk 1:31:41] } 4. b3 { [%eval -0.21] [%clk 1:31:43] } 4... d4 { [%eval -0.24] [%clk 1:32:05] } 5. e3 { [%eval -0.19] [%clk 1:31:49] } 5... c5 { [%eval -0.17] [%clk 1:32:26] } 6. exd4 { [%eval -0.35] [%clk 1:31:46] } 6... cxd4 { [%eval -0.23] [%clk 1:32:49] } 7. Bg2 { [%eval -0.33] [%clk 1:32:07] } 7... Nc6 { [%eval -0.23] [%clk 1:33:09] } 8. O-O { [%eval -0.37] [%clk 1:32:27] } 8... Bd6 { [%eval -0.36] [%clk 1:32:45] } 9. d3 { [%eval -0.31] [%clk 1:32:51] } 9... O-O { [%eval -0.38] [%clk 1:32:29] } 10. Bg5 { [%eval -0.5] [%clk 1:33:06] } 10... Be7 { [%eval -0.09] [%clk 1:27:57] } 11. Nbd2 { [%eval -0.08] [%clk 1:29:44] } 11... h6 { [%eval -0.16] [%clk 1:28:11] } 12. Bxf6 { [%eval -0.17] [%clk 1:30:06] } 12... Bxf6 { [%eval -0.14] [%clk 1:28:36] } 13. a3 { [%eval -0.18] [%clk 1:30:01] } 13... a5 { [%eval -0.13] [%clk 1:28:53] } 14. Qc2 { [%eval -0.24] [%clk 1:24:00] } 14... Bd7 { [%eval -0.21] [%clk 1:24:50] } 15. c5 { [%eval -0.36] [%clk 1:19:10] } 15... Be7 { [%eval -0.15] [%clk 1:12:35] } 16. Rfc1 { [%eval -0.09] [%clk 1:15:59] } 16... Rb8 { [%eval -0.15] [%clk 1:05:19] } 17. Rab1 { [%eval -0.4] [%clk 0:59:24] } 17... b5 { [%eval -0.37] [%clk 1:03:34] } 18. b4 { [%eval -0.5] [%clk 0:57:16] } 18... axb4 { [%eval -0.61] [%clk 0:58:03] } 19. axb4 { [%eval -0.53] [%clk 0:57:37] } 19... Qc7 { [%eval -0.09] [%clk 0:50:30] } 20. Qb2 { [%eval -0.02] [%clk 0:46:50] } 20... e5 { [%eval 0.0] [%clk 0:49:52] } 21. Ra1 { [%eval -0.01] [%clk 0:45:39] } 21... f5 { [%eval 0.0] [%clk 0:43:39] } 22. Ra6 { [%eval 0.0] [%clk 0:34:28] } 22... Bf6 { [%eval 0.0] [%clk 0:43:56] } 23. Rca1 { [%eval 0.0] [%clk 0:28:54] } 23... Kh8 { [%eval 0.0] [%clk 0:42:54] } 24. Nh4?! { [%eval -0.93] } { Inaccuracy. Qb1 was best. } { [%clk 0:26:54] } 24... Bxh4 { [%eval -0.89] [%clk 0:39:42] } 25. gxh4 { [%eval -0.91] [%clk 0:27:19] } 25... Rf6 { [%eval -1.03] [%clk 0:40:00] } 26. Kh1?! { [%eval -1.66] } { Inaccuracy. h5 was best. } { [%clk 0:21:26] } 26... Bc8 { [%eval -1.68] [%clk 0:38:04] } 27. R6a3?! { [%eval -2.49] } { Inaccuracy. Ra8 was best. } { [%clk 0:17:27] } 27... Bb7 { [%eval -2.57] [%clk 0:38:03] } 28. Rg1 { [%eval -2.58] [%clk 0:17:29] } 28... Rg6 { [%eval -2.39] [%clk 0:26:34] } 29. Nf1? { [%eval -4.37] } { Mistake. h3 was best. } { [%clk 0:11:50] } 29... Ne7? { [%eval -2.33] } { Mistake. Nxb4 was best. } { [%clk 0:18:30] } 30. Ng3 { [%eval -2.19] [%clk 0:10:35] } 30... Nd5 { [%eval -2.0] [%clk 0:14:46] } 31. c6?? { [%eval -5.17] } { Blunder. h5 was best. } { [%clk 0:07:23] } 31... Bxc6?! { [%eval -3.7] } { Inaccuracy. Rxc6 was best. } { [%clk 0:14:36] } 32. h5 { [%eval -3.9] [%clk 0:06:03] } 32... Rg5 { [%eval -3.81] [%clk 0:14:18] } 33. Rc1 { [%eval -3.49] [%clk 0:05:32] } 33... Nc3 { [%eval -3.7] [%clk 0:14:11] } 34. f3 { [%eval -3.56] [%clk 0:05:14] } 34... Qf7 { [%eval -3.38] [%clk 0:08:47] } 35. Qf2 { [%eval -3.29] [%clk 0:03:28] } 35... f4 { [%eval -3.24] [%clk 0:08:02] } 36. Ne2 { [%eval -3.5] [%clk 0:03:40] } 36... Nxe2 { [%eval -3.45] [%clk 0:06:30] } 37. Rxc6 { [%eval -3.41] [%clk 0:03:10] } 37... Nc3 { [%eval -3.49] [%clk 0:06:33] } 38. Bh3 { [%eval -4.22] [%clk 0:02:47] } 38... Qxh5 { [%eval -4.14] [%clk 0:04:47] } 39. Bg4 { [%eval -4.7] [%clk 0:03:06] } 39... Rxg4 { [%eval -4.49] [%clk 0:01:38] } 40. fxg4 { [%eval -4.17] [%clk 0:03:29] } 40... Qxg4 { [%eval -3.44] [%clk 0:02:04] } 41. Ra1 { [%eval -3.25] [%clk 0:03:51] } 41... Qd7 { [%eval -3.46] [%clk 0:01:17] } 42. Raa6 { [%eval -3.31] [%clk 0:01:03] } 42... Qd5+?! { [%eval -1.97] } { Inaccuracy. Qh3 was best. } { [%clk 0:28:12] } 43. Kg1 { [%eval -2.39] [%clk 0:27:56] } 43... Qb3 { [%eval -2.09] [%clk 0:24:43] } 44. Kg2?? { [%eval -4.72] } { Blunder. Ra1 was best. } { [%clk 0:20:14] } 44... Qd1 { [%eval -3.88] [%clk 0:22:18] } 45. Qf3 { [%eval -3.64] [%clk 0:17:30] } 45... Qd2+ { [%eval -3.81] [%clk 0:22:00] } 46. Kh3 { [%eval -4.41] [%clk 0:14:55] } 46... Qe3 { [%eval -4.39] [%clk 0:18:50] } 47. Kg2 { [%eval -4.29] [%clk 0:14:50] } 47... Rf8 { [%eval -4.21] [%clk 0:17:38] } 48. Re6 { [%eval -5.01] [%clk 0:11:43] } 48... e4 { [%eval -5.04] [%clk 0:15:55] } 49. dxe4 { [%eval -5.0] [%clk 0:06:40] } 49... d3 { [%eval -4.75] [%clk 0:16:20] } 50. Red6? { [%eval -9.0] } { Mistake. Rac6 was best. } { [%clk 0:01:56] } 50... Qe2+ { [%eval -10.8] [%clk 0:16:03] } 51. Qxe2 { [%eval -8.9] [%clk 0:01:24] } 51... dxe2 { [%eval -9.26] [%clk 0:16:27] } 52. Kf2 { [%eval -10.6] [%clk 0:00:51] } 52... f3 { [%eval -9.39] [%clk 0:14:19] } 0-1