Event: Round 7: Siva Mahadevan - Hebden, Mark L
Date: 2025-04-21
White: Siva Mahadevan
WhiteTitle: IM
WhiteElo: 2369
Black: Hebden, Mark L
BlackTitle: GM
BlackElo: 2383
Result: 1-0
ECO: E81
Opening: King's Indian Defense: Sämisch Variation, Sämisch Gambit
Variant: Standard
TimeControl: 90+30

1. d4 { [%eval 0.17] [%clk 1:28:31] } 1... Nf6 { [%eval 0.19] [%clk 1:30:57] } 2. c4 { [%eval 0.18] [%clk 1:28:42] } 2... g6 { [%eval 0.19] [%clk 1:30:29] } 3. Nc3 { [%eval 0.21] [%clk 1:28:47] } 3... Bg7 { [%eval 0.51] [%clk 1:30:52] } 4. e4 { [%eval 0.4] [%clk 1:28:30] } 4... d6 { [%eval 0.55] [%clk 1:31:16] } 5. f3 { [%eval 0.26] [%clk 1:28:05] } 5... O-O { [%eval 0.3] [%clk 1:30:45] } 6. Be3 { [%eval 0.3] [%clk 1:28:29] } 6... c5 { [%eval 0.29] [%clk 1:30:07] } 7. Nge2 { [%eval 0.31] [%clk 1:27:47] } 7... Nc6 { [%eval 0.42] [%clk 1:28:37] } 8. d5 { [%eval 0.49] [%clk 1:27:23] } 8... Ne5 { [%eval 0.47] [%clk 1:28:08] } 9. Ng3 { [%eval 0.43] [%clk 1:27:18] } 9... h5 { [%eval 0.43] [%clk 1:25:36] } 10. Be2 { [%eval 0.58] [%clk 1:27:04] } 10... h4 { [%eval 0.48] [%clk 1:25:54] } 11. Nf1 { [%eval 0.53] [%clk 1:27:24] } 11... e6 { [%eval 0.54] [%clk 1:26:08] } 12. f4 { [%eval 0.13] [%clk 1:17:42] } 12... Nxc4 { [%eval 0.11] [%clk 1:25:29] } 13. Bxc4 { [%eval 0.0] [%clk 1:18:05] } 13... b5 { [%eval -0.01] [%clk 1:25:45] } 14. Bxb5 { [%eval 0.0] [%clk 1:18:17] } 14... exd5 { [%eval 0.05] [%clk 1:25:03] } 15. e5 { [%eval 0.0] [%clk 1:18:28] } 15... d4?! { [%eval 0.88] } { Inaccuracy. dxe5 was best. } { [%clk 1:22:32] } 16. exf6 { [%eval 0.75] [%clk 1:14:21] } 16... Bxf6 { [%eval 0.74] [%clk 1:22:53] } 17. Nd5 { [%eval 1.0] [%clk 1:02:12] } 17... Rb8 { [%eval 0.82] [%clk 1:21:55] } 18. Qa4 { [%eval 0.34] [%clk 0:58:26] } 18... h3 { [%eval 0.56] [%clk 1:18:13] } 19. Bd2?! { [%eval -0.16] } { Inaccuracy. Rg1 was best. } { [%clk 0:42:18] } 19... hxg2 { [%eval -0.21] [%clk 1:17:58] } 20. Rg1 { [%eval -0.27] [%clk 0:42:40] } 20... gxf1=Q+ { [%eval -0.4] [%clk 1:17:59] } 21. Kxf1?! { [%eval -1.15] } { Inaccuracy. Bxf1 was best. } { [%clk 0:42:47] } 21... Bg7?? { [%eval 2.43] } { Blunder. Bh4 was best. } { [%clk 1:16:58] } 22. Rg5 { [%eval 2.24] [%clk 0:42:20] } 22... Bb7 { [%eval 2.88] [%clk 1:15:14] } 23. Ba5 { [%eval 3.54] [%clk 0:41:59] } 23... Qxg5 { [%eval 3.62] [%clk 1:15:35] } 24. fxg5 { [%eval 3.42] [%clk 0:42:25] } 24... Bxd5 { [%eval 3.43] [%clk 1:15:56] } 25. Bc7 { [%eval 3.37] [%clk 0:36:17] } 25... Rb7 { [%eval 3.53] [%clk 1:09:47] } 26. Bxd6 { [%eval 3.6] [%clk 0:36:24] } 26... Rd8 { [%eval 3.57] [%clk 1:09:33] } 27. Bxc5 { [%eval 3.43] [%clk 0:36:37] } 27... Bf3 { [%eval 3.97] [%clk 1:07:25] } 28. Bc6 { [%eval 3.68] [%clk 0:30:54] } 28... Rc7 { [%eval 4.44] [%clk 1:06:53] } 29. Bxf3 { [%eval 4.24] [%clk 0:29:22] } 29... Rxc5 { [%eval 4.19] [%clk 1:07:16] } 30. Qxa7 { [%eval 3.61] [%clk 0:29:29] } 30... Rf5 { [%eval 3.42] [%clk 1:05:42] } 31. Qc7 { [%eval 3.67] [%clk 0:17:03] } 31... Re8 { [%eval 3.76] [%clk 1:05:23] } 32. Qc6 { [%eval 3.61] [%clk 0:17:10] } 32... Re6?! { [%eval 4.99] } { Inaccuracy. Rd8 was best. } { [%clk 1:03:05] } 33. Qa8+ { [%eval 5.24] [%clk 0:17:24] } 33... Kh7 { [%eval 5.22] [%clk 1:03:34] } 34. Re1 { [%eval 5.03] [%clk 0:17:33] } 34... Rd6?! { [%eval 7.86] } { Inaccuracy. Ree5 was best. } { [%clk 1:02:57] } 35. Re4 { [%eval 7.25] [%clk 0:17:52] } 1-0