Event: Round 5: Olson, Hamish - Rosen, Daniel B
Site: https://lichess.org/broadcast/49th-bwci-guernsey-international-chess-festival--open/round-5/wLw4aNlW/SEy171HI
Date: 2025-10-23
White: Olson, Hamish
WhiteTitle: FM
WhiteElo: 2309
Black: Rosen, Daniel B
BlackTitle: CM
BlackElo: 1973
Result: 1-0
ECO: A90
Opening: Dutch Defense: Classical Variation
Variant: Standard

1. d4 { [%eval 0.17] [%clk 1:40:45] } 1... f5 { [%eval 0.47] [%clk 1:40:48] } 2. g3 { [%eval 0.44] [%clk 1:41:05] } 2... e6 { [%eval 0.48] [%clk 1:41:09] } 3. Bg2 { [%eval 0.35] [%clk 1:41:27] } 3... Nf6 { [%eval 0.44] [%clk 1:41:29] } 4. Nf3 { [%eval 0.39] [%clk 1:41:46] } 4... d5 { [%eval 0.47] [%clk 1:41:16] } 5. c4 { [%eval 0.4] [%clk 1:41:27] } 5... c6 { [%eval 0.46] [%clk 1:41:34] } 6. Qc2 { [%eval 0.32] [%clk 1:41:48] } 6... Bd6 { [%eval 0.5] [%clk 1:41:41] } 7. Bf4 { [%eval 0.41] [%clk 1:41:42] } 7... Bxf4 { [%eval 0.35] [%clk 1:41:15] } 8. gxf4 { [%eval 0.41] [%clk 1:42:10] } 8... O-O { [%eval 0.4] [%clk 1:41:24] } 9. Nbd2 { [%eval 0.38] [%clk 1:42:09] } 9... Bd7 { [%eval 0.55] [%clk 1:41:01] } 10. Qb3 { [%eval 0.64] [%clk 1:36:15] } 10... Qb6 { [%eval 0.59] [%clk 1:37:36] } 11. a4 { [%eval 0.46] [%clk 1:27:10] } 11... Na6 { [%eval 0.75] [%clk 1:32:48] } 12. a5 { [%eval 0.29] [%clk 1:25:38] } 12... Qxb3 { [%eval 0.25] [%clk 1:26:20] } 13. Nxb3 { [%eval 0.2] [%clk 1:26:06] } 13... dxc4 { [%eval 0.23] [%clk 1:26:14] } 14. Nbd2 { [%eval 0.14] [%clk 1:26:09] } 14... Nb4 { [%eval 0.28] [%clk 1:25:25] } 15. O-O { [%eval 0.3] [%clk 1:20:05] } 15... Nbd5 { [%eval 0.17] [%clk 1:24:21] } 16. e3 { [%eval 0.16] [%clk 1:19:20] } 16... c3 { [%eval 0.2] [%clk 1:22:58] } 17. bxc3 { [%eval 0.25] [%clk 1:19:17] } 17... Nxc3 { [%eval 0.26] [%clk 1:23:20] } 18. Ne5 { [%eval 0.23] [%clk 1:19:21] } 18... a6?! { [%eval 0.97] } { Inaccuracy. Rfc8 was best. } { [%clk 1:19:05] } 19. Nb3 { [%eval 1.03] [%clk 1:17:37] } 19... Rae8 { [%eval 0.93] [%clk 1:16:49] } 20. Nc5 { [%eval 1.02] [%clk 1:17:37] } 20... Bc8 { [%eval 0.79] [%clk 1:17:09] } 21. Bf3 { [%eval 0.86] [%clk 1:16:51] } 21... Re7 { [%eval 0.95] [%clk 1:15:22] } 22. h3 { [%eval 0.98] [%clk 1:16:37] } 22... Rc7 { [%eval 1.09] [%clk 1:12:58] } 23. Rfc1 { [%eval 0.82] [%clk 1:09:20] } 23... Nb5 { [%eval 0.9] [%clk 1:12:08] } 24. Bd1 { [%eval 0.96] [%clk 1:07:53] } 24... Re8 { [%eval 1.16] [%clk 1:11:44] } 25. Bb3 { [%eval 1.12] [%clk 1:08:02] } 25... Kf8 { [%eval 0.99] [%clk 1:10:51] } 26. f3 { [%eval 1.11] [%clk 1:05:35] } 26... Ke7 { [%eval 1.18] [%clk 1:06:46] } 27. Rc2 { [%eval 1.2] [%clk 1:01:05] } 27... Nd6 { [%eval 1.24] [%clk 0:51:42] } 28. Kf2 { [%eval 1.17] [%clk 0:55:33] } 28... Kf8 { [%eval 1.18] [%clk 0:50:54] } 29. h4 { [%eval 1.18] [%clk 0:55:05] } 29... g6 { [%eval 1.26] [%clk 0:41:52] } 30. Rac1 { [%eval 1.31] [%clk 0:55:16] } 30... Nb5 { [%eval 1.19] [%clk 0:40:10] } 31. Rb2 { [%eval 1.09] [%clk 0:54:11] } 31... Ke7 { [%eval 1.17] [%clk 0:39:33] } 32. Ke2 { [%eval 1.18] [%clk 0:52:52] } 32... Rd8 { [%eval 1.23] [%clk 0:34:03] } 33. Rbc2 { [%eval 0.98] [%clk 0:44:35] } 33... Rd6?! { [%eval 1.59] } { Inaccuracy. Na3 was best. } { [%clk 0:32:48] } 34. Nc4 { [%eval 1.84] [%clk 0:44:01] } 34... Rd8 { [%eval 1.61] [%clk 0:33:00] } 35. Nb6 { [%eval 1.81] [%clk 0:43:18] } 35... Nd5 { [%eval 2.44] [%clk 0:31:49] } 36. Na8 { [%eval 2.33] [%clk 0:42:21] } 36... Kd6?! { [%eval 3.32] } { Inaccuracy. Rcd7 was best. } { [%clk 0:23:08] } 37. Nxc7 { [%eval 3.19] [%clk 0:42:06] } 37... Nbxc7 { [%eval 3.71] [%clk 0:22:48] } 38. Nd3 { [%eval 3.44] [%clk 0:41:48] } 38... Bd7 { [%eval 3.28] [%clk 0:21:43] } 39. Kf2 { [%eval 2.86] [%clk 0:41:01] } 39... Nf6 { [%eval 2.76] [%clk 0:20:57] } 40. Ne5 { [%eval 2.46] [%clk 0:40:21] } 40... Be8?! { [%eval 3.51] } { Inaccuracy. Ke7 was best. } { [%clk 0:21:11] } 41. Bc4 { [%eval 3.09] [%clk 0:39:39] } 41... Ke7 { [%eval 3.04] [%clk 0:18:16] } 42. Rb2 { [%eval 2.95] [%clk 0:39:33] } 42... Nb5?! { [%eval 3.84] } { Inaccuracy. Rb8 was best. } { [%clk 0:18:27] } 43. Bxb5 { [%eval 3.89] [%clk 0:37:30] } 43... axb5 { [%eval 3.9] [%clk 0:18:18] } 44. a6 { [%eval 3.8] [%clk 0:35:03] } 44... bxa6 { [%eval 3.85] [%clk 0:18:33] } 45. Ra1 { [%eval 3.76] [%clk 0:34:58] } 45... Kd6 { [%eval 4.28] [%clk 0:12:24] } 46. Rxa6 { [%eval 4.31] [%clk 0:34:52] } 46... Rb8 { [%eval 4.12] [%clk 0:12:47] } 47. Ra7 { [%eval 4.22] [%clk 0:32:13] } 47... c5 { [%eval 4.72] [%clk 0:12:00] } 48. Ra6+ { [%eval 4.93] [%clk 0:29:42] } 48... Kd5 { [%eval 4.71] [%clk 0:12:08] } 49. Nd3 { [%eval 4.43] [%clk 0:22:21] } 49... cxd4?? { [%eval #8] } { Checkmate is now unavoidable. b4 was best. } { [%clk 0:11:37] } 50. Rc2 { [%eval #7] [%clk 0:22:19] } 1-0