Event: Nuorten SM 2025, U18
Site: Valkeakoski, Finland
Date: 2025-06-05
White: Collander, David
WhiteElo: 1869
Black: Odner, Aarni
BlackElo: 2046
Result: 0-1
ECO: B94
Opening: Sicilian Defense: Najdorf Variation
Variant: Standard
TimeControl: 90' / 40 moves + 30' + 30 sec / move

1. e4 { [%eval 0.18] [%clk 1:30:58] } 1... c5 { [%eval 0.25] [%clk 1:30:18] } 2. Nf3 { [%eval 0.2] [%clk 1:31:24] } 2... d6 { [%eval 0.31] [%clk 1:30:19] } 3. d4 { [%eval 0.22] [%clk 1:31:50] } 3... cxd4 { [%eval 0.19] [%clk 1:30:44] } 4. Nxd4 { [%eval 0.18] [%clk 1:32:17] } 4... Nf6 { [%eval 0.31] [%clk 1:30:47] } 5. Nc3 { [%eval 0.32] [%clk 1:32:46] } 5... a6 { [%eval 0.28] [%clk 1:31:06] } 6. Bg5 { [%eval 0.0] [%clk 1:33:12] } 6... Nbd7 { [%eval 0.19] [%clk 1:31:23] } 7. Bc4 { [%eval 0.19] [%clk 1:33:35] } 7... b5?! { [%eval 0.98] } { Inaccuracy. e6 was best. } { [%clk 1:12:03] } 8. Bb3?! { [%eval 0.26] } { Inaccuracy. Bd5 was best. } { [%clk 1:33:49] } 8... Bb7 { [%eval 0.3] [%clk 1:11:54] } 9. Qe2 { [%eval 0.53] [%clk 1:34:06] } 9... Qa5 { [%eval 1.0] [%clk 1:00:11] } 10. O-O-O { [%eval 0.54] [%clk 1:31:16] } 10... b4?! { [%eval 1.34] } { Inaccuracy. e6 was best. } { [%clk 0:52:31] } 11. Nd5 { [%eval 1.33] [%clk 1:30:55] } 11... e6 { [%eval 1.21] [%clk 0:51:05] } 12. Nxf6+ { [%eval 1.36] [%clk 1:30:02] } 12... gxf6 { [%eval 1.29] [%clk 0:51:13] } 13. Bd2?! { [%eval 0.53] } { Inaccuracy. Bh4 was best. } { [%clk 1:28:12] } 13... Qe5?? { [%eval 2.84] } { Blunder. Nc5 was best. } { [%clk 0:47:12] } 14. Bxb4 { [%eval 2.65] [%clk 1:25:46] } 14... Qxe4 { [%eval 3.21] [%clk 0:43:52] } 15. Qxe4?? { [%eval 0.61] } { Blunder. Qd2 was best. } { [%clk 1:22:42] } 15... Bxe4 { [%eval 0.6] [%clk 0:44:18] } 16. f3 { [%eval 0.33] [%clk 1:22:24] } 16... Bb7 { [%eval 0.46] [%clk 0:44:17] } 17. Rhe1 { [%eval 0.0] [%clk 1:22:04] } 17... d5 { [%eval 0.05] [%clk 0:40:10] } 18. Bxf8 { [%eval -0.19] [%clk 1:11:48] } 18... Kxf8 { [%eval -0.24] [%clk 0:40:10] } 19. c3 { [%eval -0.28] [%clk 1:11:27] } 19... Rg8 { [%eval -0.15] [%clk 0:38:16] } 20. g3 { [%eval -0.19] [%clk 1:09:53] } 20... Rc8 { [%eval -0.05] [%clk 0:36:32] } 21. f4 { [%eval -0.32] [%clk 1:07:46] } 21... Nc5 { [%eval -0.27] [%clk 0:35:08] } 22. Bc2 { [%eval -0.34] [%clk 1:06:56] } 22... f5 { [%eval -0.4] [%clk 0:34:52] } 23. Kd2 { [%eval -0.52] [%clk 1:00:06] } 23... Ne4+ { [%eval -0.4] [%clk 0:33:56] } 24. Ke3 { [%eval -0.44] [%clk 1:00:32] } 24... Ke7 { [%eval -0.41] [%clk 0:33:40] } 25. Nf3 { [%eval -0.57] [%clk 0:59:16] } 25... Bc6 { [%eval -0.28] [%clk 0:29:50] } 26. Bd3 { [%eval -0.24] [%clk 0:57:12] } 26... Ba4 { [%eval -0.07] [%clk 0:27:40] } 27. Rc1 { [%eval -0.24] [%clk 0:57:06] } 27... Bb5 { [%eval -0.14] [%clk 0:27:46] } 28. Bxb5 { [%eval -0.24] [%clk 0:56:40] } 28... axb5 { [%eval -0.19] [%clk 0:28:09] } 29. Nd4 { [%eval -0.21] [%clk 0:57:01] } 29... Rc5 { [%eval 0.0] [%clk 0:27:50] } 30. Kd3 { [%eval -0.27] [%clk 0:56:15] } 30... Ra8 { [%eval -0.25] [%clk 0:24:46] } 31. a3 { [%eval -0.15] [%clk 0:53:50] } 31... Rac8 { [%eval -0.1] [%clk 0:24:41] } 32. Re2 { [%eval -0.18] [%clk 0:53:14] } 32... Kd7 { [%eval -0.16] [%clk 0:24:42] } 33. Nf3 { [%eval -0.16] [%clk 0:51:29] } 33... R5c7 { [%eval -0.14] [%clk 0:23:38] } 34. Rg2 { [%eval -0.2] [%clk 0:49:50] } 34... Rb7 { [%eval -0.09] [%clk 0:21:57] } 35. Ke3 { [%eval -0.11] [%clk 0:47:42] } 35... b4 { [%eval -0.05] [%clk 0:20:47] } 36. Ne5+ { [%eval -0.03] [%clk 0:46:04] } 36... Ke7 { [%eval -0.03] [%clk 0:20:35] } 37. axb4 { [%eval -0.03] [%clk 0:46:22] } 37... Rxb4 { [%eval -0.02] [%clk 0:20:34] } 38. Ra1 { [%eval -0.1] [%clk 0:46:19] } 38... Rb7 { [%eval -0.16] [%clk 0:20:13] } 39. Ra6 { [%eval -0.22] [%clk 0:46:06] } 39... Nc5 { [%eval -0.05] [%clk 0:15:04] } 40. Ra3 { [%eval -0.27] [%clk 0:45:05] } 40... Kd6 { [%eval -0.11] [%clk 0:11:27] } 41. b4 { [%eval -0.07] [%clk 0:40:37] } 41... Ne4 { [%eval -0.14] [%clk 0:11:37] } 42. Rc2 { [%eval -0.09] [%clk 0:40:47] } 42... f6 { [%eval 0.0] [%clk 0:06:32] } 43. Ra6+ { [%eval 0.0] [%clk 0:37:48] } 43... Ke7 { [%eval 0.0] [%clk 0:06:53] } 44. Nc6+ { [%eval 0.0] [%clk 0:37:48] } 44... Kd7 { [%eval 0.0] [%clk 0:05:34] } 45. Nd4 { [%eval 0.0] [%clk 0:37:12] } 45... Nd6 { [%eval 0.0] [%clk 0:05:42] } 46. Kd3 { [%eval 0.0] [%clk 0:36:32] } 46... e5 { [%eval 0.0] [%clk 0:05:15] } 47. Nb3 { [%eval 0.0] [%clk 0:36:30] } 47... Ne4 { [%eval 0.0] [%clk 0:04:56] } 48. Ra5 { [%eval -0.06] [%clk 0:34:13] } 48... Kd6 { [%eval 0.0] [%clk 0:30:21] } 49. Ra6+ { [%eval 0.0] [%clk 1:04:25] } 49... Ke7 { [%eval 0.0] [%clk 0:30:24] } 50. Ra5? { [%eval -1.57] } { Mistake. Na5 was best. } { [%clk 1:03:38] } 50... Rbc7 { [%eval -2.25] [%clk 0:30:26] } 51. Nc5 { [%eval -2.16] [%clk 1:01:41] } 51... Nxc5+ { [%eval -2.07] [%clk 0:29:23] } 52. bxc5 { [%eval -1.89] [%clk 1:02:03] } 52... Rxc5 { [%eval -1.76] [%clk 0:29:44] } 53. Rxc5 { [%eval -2.07] [%clk 1:02:09] } 53... Rxc5 { [%eval -1.6] [%clk 0:30:06] } 54. Ra2 { [%eval -1.48] [%clk 1:02:26] } 54... Rc7? { [%eval -0.03] } { Mistake. Kd6 was best. } { [%clk 0:26:40] } 55. Ra6 { [%eval -0.17] [%clk 1:02:17] } 55... Rd7 { [%eval 0.0] [%clk 0:24:46] } 56. Ke3 { [%eval -0.28] [%clk 1:01:08] } 56... h6 { [%eval 0.0] [%clk 0:24:37] } 57. fxe5 { [%eval 0.0] [%clk 1:01:03] } 57... fxe5 { [%eval 0.0] [%clk 0:25:00] } 58. Rxh6 { [%eval 0.0] [%clk 1:01:26] } 58... Rc7 { [%eval 0.0] [%clk 0:23:24] } 59. Kd3 { [%eval 0.0] [%clk 0:59:33] } 59... Rc4 { [%eval 0.0] [%clk 0:22:37] } 60. Rh5 { [%eval 0.0] [%clk 0:55:56] } 60... Kf6 { [%eval 0.0] [%clk 0:21:07] } 61. Rh6+ { [%eval 0.0] [%clk 0:55:31] } 61... Kg5 { [%eval 0.0] [%clk 0:20:51] } 62. Rd6 { [%eval 0.0] [%clk 0:55:44] } 62... Rc5 { [%eval 0.0] [%clk 0:21:02] } 63. Re6 { [%eval 0.0] [%clk 0:51:11] } 63... e4+ { [%eval 0.0] [%clk 0:21:21] } 64. Kd4 { [%eval 0.0] [%clk 0:51:20] } 64... Rc4+ { [%eval 0.0] [%clk 0:20:12] } 65. Kxd5 { [%eval 0.0] [%clk 0:48:28] } 65... Rxc3 { [%eval -0.12] [%clk 0:20:32] } 66. h4+?? { [%eval -2.32] } { Blunder. Re8 was best. } { [%clk 0:48:08] } 66... Kg4 { [%eval -2.26] [%clk 0:19:09] } 67. Rg6+ { [%eval -2.3] [%clk 0:48:24] } 67... Kf3 { [%eval -2.2] [%clk 0:18:11] } 68. Rf6 { [%eval -2.27] [%clk 0:47:59] } 68... e3 { [%eval -2.22] [%clk 0:17:13] } 69. Rxf5+ { [%eval -2.22] [%clk 0:47:53] } 69... Kxg3 { [%eval -2.19] [%clk 0:17:33] } 70. Re5 { [%eval -2.23] [%clk 0:46:42] } 70... Kf2 { [%eval -2.3] [%clk 0:16:58] } 71. Ke4?? { [%eval -9.75] } { Blunder. Rf5+ was best. } { [%clk 0:46:24] } 71... e2 { [%eval -7.81] [%clk 0:16:55] } 72. Kf4? { [%eval #-15] } { Checkmate is now unavoidable. Kd4 was best. } { [%clk 0:44:22] } 72... Rf3+ { [%eval -12.44] [%clk 0:17:03] } 0-1