Event: Round 9: Viktor Matviishen - Joshua Posthuma
Date: 2021-06-20
White: Viktor Matviishen
WhiteTitle: IM
Black: Joshua Posthuma
BlackTitle: FM
Result: 0-1
ECO: A50
Opening: Queen's Indian Accelerated
Variant: Standard

1. d4 { [%eval 0.0] [%clk 1:28:55] } 1... Nf6 { [%eval 0.19] [%clk 1:30:56] } 2. c4 { [%eval 0.11] [%clk 1:29:13] } 2... b6 { [%eval 0.44] [%clk 1:30:58] } 3. Nc3 { [%eval 0.48] [%clk 1:28:52] } 3... Bb7 { [%eval 0.33] [%clk 1:31:16] } 4. Qc2 { [%eval 0.25] [%clk 1:29:18] } 4... d5 { [%eval 0.49] [%clk 1:30:13] } 5. cxd5 { [%eval 0.46] [%clk 1:29:42] } 5... Nxd5 { [%eval 0.55] [%clk 1:30:39] } 6. Nf3 { [%eval 0.13] [%clk 1:30:04] } 6... e6 { [%eval 0.59] [%clk 1:30:09] } 7. e4 { [%eval 0.46] [%clk 1:30:29] } 7... Nxc3 { [%eval 0.66] [%clk 1:30:30] } 8. bxc3 { [%eval 0.63] [%clk 1:30:56] } 8... Nd7 { [%eval 0.68] [%clk 1:25:51] } 9. Bd3 { [%eval 0.55] [%clk 1:30:29] } 9... c5?! { [%eval 1.28] } { Inaccuracy. Rc8 was best. } { [%clk 1:25:08] } 10. O-O?! { [%eval 0.64] } { Inaccuracy. d5 was best. } { [%clk 1:30:08] } 10... Rc8 { [%eval 0.62] [%clk 1:22:42] } 11. Qe2 { [%eval 0.5] [%clk 1:30:12] } 11... cxd4 { [%eval 0.65] [%clk 1:08:20] } 12. cxd4 { [%eval 0.51] [%clk 1:30:36] } 12... Be7 { [%eval 0.57] [%clk 1:02:36] } 13. Bf4 { [%eval 0.5] [%clk 1:30:15] } 13... O-O { [%eval 0.46] [%clk 1:00:08] } 14. Rfd1 { [%eval 0.61] [%clk 1:23:34] } 14... Nf6 { [%eval 0.34] [%clk 0:46:00] } 15. d5?! { [%eval -0.41] } { Inaccuracy. Bd2 was best. } { [%clk 1:06:23] } 15... exd5 { [%eval -0.27] [%clk 0:45:30] } 16. e5 { [%eval -0.25] [%clk 1:06:46] } 16... Nh5 { [%eval -0.45] [%clk 0:34:45] } 17. Be3 { [%eval -0.49] [%clk 1:05:22] } 17... g6 { [%eval -0.43] [%clk 0:32:45] } 18. Nd4?! { [%eval -0.96] } { Inaccuracy. Bh6 was best. } { [%clk 0:45:07] } 18... Ng7 { [%eval -0.71] [%clk 0:30:14] } 19. Qg4 { [%eval -0.77] [%clk 0:35:31] } 19... f5?! { [%eval -0.01] } { Inaccuracy. Bc5 was best. } { [%clk 0:27:47] } 20. Qf3 { [%eval -0.5] [%clk 0:33:07] } 20... f4 { [%eval -0.59] [%clk 0:23:59] } 21. Bc1 { [%eval -0.47] [%clk 0:29:25] } 21... Bc5 { [%eval -0.81] [%clk 0:20:31] } 22. Ne2?? { [%eval -3.81] } { Blunder. Bf1 was best. } { [%clk 0:27:54] } 22... Ne6?? { [%eval -1.51] } { Blunder. Qh4 was best. } { [%clk 0:19:38] } 23. Qg4?! { [%eval -2.32] } { Inaccuracy. Nxf4 was best. } { [%clk 0:27:47] } 23... Qe7?! { [%eval -1.65] } { Inaccuracy. Qe8 was best. } { [%clk 0:19:03] } 24. Rb1? { [%eval -3.28] } { Mistake. Nxf4 was best. } { [%clk 0:19:55] } 24... Rf7?! { [%eval -2.23] } { Inaccuracy. Qf7 was best. } { [%clk 0:16:45] } 25. Rb3?? { [%eval -4.78] } { Blunder. Nxf4 was best. } { [%clk 0:12:38] } 25... Rcf8 { [%eval -4.86] [%clk 0:16:14] } 26. Bb1?! { [%eval -6.52] } { Inaccuracy. Nc3 was best. } { [%clk 0:10:58] } 26... Bc8 { [%eval -6.39] [%clk 0:12:32] } 27. Qf3 { [%eval -7.59] [%clk 0:11:27] } 27... Ng5 { [%eval -5.82] [%clk 0:12:45] } 28. Qc3?! { [%eval -9.09] } { Inaccuracy. Qxd5 was best. } { [%clk 0:11:22] } 28... f3 { [%eval -8.56] [%clk 0:12:26] } 29. Ng3 { [%eval -10.44] [%clk 0:07:10] } 29... fxg2 { [%eval -11.0] [%clk 0:12:02] } 30. Bxg5 { [%eval -11.44] [%clk 0:06:28] } 30... Qxg5 { [%eval -11.12] [%clk 0:11:44] } 31. Rxd5?! { [%eval #-7] } { Checkmate is now unavoidable. Rb2 was best. } { [%clk 0:06:52] } 31... Rxf2 { [%eval #-6] [%clk 0:10:33] } 32. Rxc5 { [%eval #-2] [%clk 0:07:17] } 32... Rf1+ { [%eval #-1] [%clk 0:10:45] } 0-1