Event: Maia Chess Open
Site: https://lichess.org/broadcast/maia-chess-festival-2025--masters/round-4/r2qYA9BQ/3uC1SB9k
White: Koster, Ramon
WhiteTitle: FM
WhiteElo: 2335
Black: Bailet, Pierre
BlackTitle: GM
BlackElo: 2454
Result: 1/2-1/2
ECO: E73
Opening: King's Indian Defense: Semi-Averbakh System
Variant: Standard

1. d4 { [%eval 0.17] [%clk 1:27:45] } 1... Nf6 { [%eval 0.19] [%clk 1:30:09] } 2. c4 { [%eval 0.18] [%clk 1:28:10] } 2... g6 { [%eval 0.28] [%clk 1:30:29] } 3. Nc3 { [%eval 0.18] [%clk 1:28:36] } 3... Bg7 { [%eval 0.51] [%clk 1:30:47] } 4. e4 { [%eval 0.4] [%clk 1:28:58] } 4... d6 { [%eval 0.55] [%clk 1:30:58] } 5. Be2 { [%eval 0.51] [%clk 1:29:16] } 5... O-O { [%eval 0.48] [%clk 1:30:37] } 6. Be3 { [%eval 0.5] [%clk 1:29:35] } 6... Na6 { [%eval 0.52] [%clk 1:28:43] } 7. Nf3 { [%eval 0.41] [%clk 1:29:21] } 7... e5 { [%eval 0.38] [%clk 1:28:29] } 8. O-O { [%eval 0.44] [%clk 1:28:15] } 8... Qe7 { [%eval 0.54] [%clk 1:25:02] } 9. d5 { [%eval 0.54] [%clk 1:25:51] } 9... Ng4 { [%eval 0.52] [%clk 1:25:01] } 10. Bg5 { [%eval 0.49] [%clk 1:25:52] } 10... f6 { [%eval 0.53] [%clk 1:25:16] } 11. Bh4 { [%eval 0.47] [%clk 1:26:03] } 11... Nh6 { [%eval 0.52] [%clk 1:24:03] } 12. Nd2 { [%eval 0.46] [%clk 1:24:46] } 12... c5 { [%eval 0.84] [%clk 1:20:39] } 13. f3 { [%eval 0.52] [%clk 1:16:31] } 13... Nf7 { [%eval 0.5] [%clk 1:17:49] } 14. a3 { [%eval 0.53] [%clk 1:13:32] } 14... Bh6 { [%eval 0.45] [%clk 1:15:42] } 15. Bf2 { [%eval 0.44] [%clk 1:13:53] } 15... f5 { [%eval 0.54] [%clk 1:14:15] } 16. exf5 { [%eval 0.32] [%clk 1:13:55] } 16... gxf5 { [%eval 0.44] [%clk 1:12:25] } 17. Qc2 { [%eval 0.22] [%clk 1:08:45] } 17... Kh8 { [%eval 0.41] [%clk 1:07:19] } 18. Kh1 { [%eval 0.41] [%clk 1:07:52] } 18... Bd7 { [%eval 0.75] [%clk 1:02:52] } 19. Rg1 { [%eval 0.33] [%clk 1:03:39] } 19... Rg8 { [%eval 0.54] [%clk 1:00:08] } 20. Rab1 { [%eval 0.24] [%clk 0:57:27] } 20... b6 { [%eval 0.3] [%clk 0:56:33] } 21. b4 { [%eval 0.22] [%clk 0:53:13] } 21... Rg6 { [%eval 0.66] [%clk 0:48:00] } 22. Bd3 { [%eval 0.22] [%clk 0:34:16] } 22... Bf4?! { [%eval 1.12] } { Inaccuracy. Qf6 was best. } { [%clk 0:41:47] } 23. Nf1 { [%eval 1.13] [%clk 0:28:53] } 23... Qf6 { [%eval 1.27] [%clk 0:35:08] } 24. g3 { [%eval 0.93] [%clk 0:27:41] } 24... Bh6 { [%eval 1.33] [%clk 0:31:57] } 25. Ne3 { [%eval 1.43] [%clk 0:11:16] } 25... Bxe3 { [%eval 1.68] [%clk 0:24:44] } 26. Bxe3 { [%eval 1.58] [%clk 0:11:39] } 26... Ng5 { [%eval 2.14] [%clk 0:24:51] } 27. Rgf1 { [%eval 2.07] [%clk 0:07:16] } 27... Nh3 { [%eval 2.01] [%clk 0:20:04] } 28. f4 { [%eval 2.04] [%clk 0:06:34] } 28... exf4?! { [%eval 2.78] } { Inaccuracy. Rf8 was best. } { [%clk 0:17:20] } 29. Bxf4 { [%eval 2.5] [%clk 0:06:34] } 29... Nxf4 { [%eval 2.53] [%clk 0:15:49] } 30. Rxf4 { [%eval 2.47] [%clk 0:07:02] } 30... Rg4?! { [%eval 3.31] } { Inaccuracy. Rf8 was best. } { [%clk 0:15:15] } 31. Rf2? { [%eval 1.76] } { Mistake. Ne4 was best. } { [%clk 0:06:49] } 31... Qg7 { [%eval 2.27] [%clk 0:13:18] } 32. Ne2 { [%eval 2.27] [%clk 0:06:03] } 32... cxb4 { [%eval 2.65] [%clk 0:11:54] } 33. axb4 { [%eval 2.64] [%clk 0:06:25] } 33... b5 { [%eval 2.85] [%clk 0:12:48] } 34. cxb5?? { [%eval 0.18] } { Blunder. Nf4 was best. } { [%clk 0:04:55] } 34... Nxb4 { [%eval 0.17] [%clk 0:13:01] } 35. Qb3 { [%eval 0.11] [%clk 0:04:33] } 35... Nxd3 { [%eval 0.2] [%clk 0:05:50] } 36. Qxd3 { [%eval 0.26] [%clk 0:05:01] } 36... Re4 { [%eval 0.53] [%clk 0:06:13] } 37. Nf4 { [%eval 0.67] [%clk 0:04:46] } 37... Qe5 { [%eval 0.66] [%clk 0:05:38] } 38. Kg1?! { [%eval 0.11] } { Inaccuracy. Kg2 was best. } { [%clk 0:01:32] } 38... Rc8 { [%eval 0.49] [%clk 0:02:44] } 39. Qd2 { [%eval 0.49] [%clk 0:01:16] } 39... Rb8 { [%eval 0.32] [%clk 0:01:54] } 40. Qa5 { [%eval 0.33] [%clk 0:30:32] } 40... Rg8 { [%eval 0.4] [%clk 0:31:03] } 41. Qd2 { [%eval 0.03] [%clk 0:25:55] } 41... Rb8 { [%eval 0.32] [%clk 0:27:37] } 42. Qa5 { [%eval 0.39] [%clk 0:24:32] } 42... Rg8 { [%eval 0.45] [%clk 0:20:40] } 43. Qd2 { [%eval 0.0] [%clk 0:24:54] } 1/2-1/2