Event: Round 8: Mustonen, Niko - Koykka, Pekka
Date: 2025-07-18
White: Mustonen, Niko
WhiteElo: 1971
Black: Koykka, Pekka
BlackTitle: IM
BlackElo: 2359
Result: 0-1
ECO: D10
Opening: Slav Defense: Exchange Variation
Variant: Standard

1. d4 { [%eval 0.17] [%clk 1:27:53] } 1... d5 { [%eval 0.2] [%clk 1:30:52] } 2. c4 { [%eval 0.18] [%clk 1:28:18] } 2... c6 { [%eval 0.21] [%clk 1:31:16] } 3. cxd5 { [%eval 0.15] [%clk 1:28:45] } 3... cxd5 { [%eval 0.19] [%clk 1:31:41] } 4. Bf4 { [%eval 0.13] [%clk 1:29:13] } 4... Nc6 { [%eval 0.19] [%clk 1:31:53] } 5. e3 { [%eval 0.13] [%clk 1:29:40] } 5... e6 { [%eval 0.25] [%clk 1:24:50] } 6. Nc3 { [%eval 0.26] [%clk 1:29:51] } 6... a6 { [%eval 0.39] [%clk 1:22:58] } 7. Bd3 { [%eval 0.35] [%clk 1:30:15] } 7... Nf6 { [%eval 0.49] [%clk 1:20:47] } 8. Nf3 { [%eval 0.43] [%clk 1:30:41] } 8... Bd6 { [%eval 0.49] [%clk 1:21:03] } 9. Bxd6 { [%eval 0.26] [%clk 1:31:06] } 9... Qxd6 { [%eval 0.28] [%clk 1:21:28] } 10. O-O { [%eval 0.26] [%clk 1:31:34] } 10... O-O { [%eval 0.25] [%clk 1:21:31] } 11. Na4 { [%eval 0.16] [%clk 1:32:03] } 11... e5 { [%eval 0.15] [%clk 1:18:07] } 12. dxe5 { [%eval 0.18] [%clk 1:32:29] } 12... Nxe5 { [%eval 0.25] [%clk 1:18:28] } 13. Nxe5 { [%eval 0.21] [%clk 1:32:23] } 13... Qxe5 { [%eval 0.19] [%clk 1:18:52] } 14. Nb6 { [%eval -0.02] [%clk 1:32:17] } 14... Bg4 { [%eval 0.21] [%clk 1:13:18] } 15. Be2?! { [%eval -0.66] } { Inaccuracy. Qa4 was best. } { [%clk 1:32:05] } 15... Bxe2 { [%eval -0.65] [%clk 1:13:39] } 16. Qxe2 { [%eval -0.53] [%clk 1:32:32] } 16... Rad8 { [%eval -0.72] [%clk 1:13:57] } 17. h3?! { [%eval -1.32] } { Inaccuracy. Rad1 was best. } { [%clk 1:16:37] } 17... d4?! { [%eval -0.66] } { Inaccuracy. Rd6 was best. } { [%clk 1:06:54] } 18. Nc4 { [%eval -0.48] [%clk 1:12:54] } 18... Qe6 { [%eval -0.55] [%clk 1:02:20] } 19. b3?! { [%eval -1.14] } { Inaccuracy. Na5 was best. } { [%clk 1:08:13] } 19... b5 { [%eval -1.05] [%clk 1:00:54] } 20. Na5? { [%eval -2.45] } { Mistake. Nd2 was best. } { [%clk 1:04:02] } 20... Qb6? { [%eval -1.21] } { Mistake. d3 was best. } { [%clk 0:57:58] } 21. b4 { [%eval -1.19] [%clk 1:02:06] } 21... Rfe8 { [%eval -1.23] [%clk 0:56:59] } 22. Rac1 { [%eval -1.23] [%clk 1:00:37] } 22... dxe3 { [%eval -1.39] [%clk 0:53:01] } 23. Rc6?! { [%eval -2.39] } { Inaccuracy. fxe3 was best. } { [%clk 0:59:58] } 23... Qa7 { [%eval -2.27] [%clk 0:40:10] } 24. fxe3 { [%eval -2.33] [%clk 0:50:05] } 24... Ne4? { [%eval -0.97] } { Mistake. Nd5 was best. } { [%clk 0:37:05] } 25. Rf3?? { [%eval -2.98] } { Blunder. Rfc1 was best. } { [%clk 0:39:10] } 25... Rd2 { [%eval -3.2] [%clk 0:35:55] } 26. Qe1 { [%eval -2.75] [%clk 0:39:17] } 26... Qd7 { [%eval -2.89] [%clk 0:34:26] } 27. Kh2?! { [%eval -3.94] } { Inaccuracy. Rc1 was best. } { [%clk 0:38:43] } 27... Rxa2 { [%eval -3.89] [%clk 0:31:35] } 28. Rxa6 { [%eval -4.54] [%clk 0:37:33] } 28... Qc7+ { [%eval -4.85] [%clk 0:31:18] } 29. Kg1 { [%eval -5.29] [%clk 0:33:24] } 29... Qc2 { [%eval -5.22] [%clk 0:29:15] } 30. Qf1 { [%eval -5.23] [%clk 0:33:19] } 30... Nd2 { [%eval -5.29] [%clk 0:25:55] } 31. Rf2 { [%eval -5.53] [%clk 0:33:48] } 31... Nxf1 { [%eval -5.38] [%clk 0:26:11] } 32. Rxc2 { [%eval -5.49] [%clk 0:34:15] } 32... Rxc2 { [%eval -5.3] [%clk 0:26:31] } 33. Kxf1 { [%eval -5.39] [%clk 0:33:56] } 33... g6 { [%eval -5.36] [%clk 0:25:22] } 34. Rb6 { [%eval -6.67] [%clk 0:34:14] } 34... Rd8 { [%eval -6.54] [%clk 0:24:27] } 35. Kg1 { [%eval -6.38] [%clk 0:31:56] } 35... Rdd2 { [%eval -6.12] [%clk 0:23:57] } 0-1