Event: South African Chess Open
Site: South Africa
Date: 2025-06-28
White: Jacobs, Calvin Nicholas
WhiteElo: 1905
Black: Oatlhotse, Providence
BlackTitle: IM
BlackElo: 2241
Result: 0-1
ECO: A01
Opening: Nimzo-Larsen Attack: Classical Variation
Variant: Standard
TimeControl: 90+30

1. b3 { [%eval 0.0] [%clk 0:37:41] } 1... d5 { [%eval 0.0] [%clk 1:12:43] } 2. Bb2 { [%eval 0.0] [%clk 0:37:57] } 2... Bf5 { [%eval 0.0] [%clk 1:12:26] } 3. e3 { [%eval 0.0] [%clk 0:37:54] } 3... Nf6 { [%eval 0.0] [%clk 1:12:40] } 4. f4 { [%eval -0.26] [%clk 0:37:54] } 4... e6 { [%eval -0.25] [%clk 1:12:22] } 5. Nf3 { [%eval -0.27] [%clk 0:37:40] } 5... Be7 { [%eval -0.25] [%clk 1:11:55] } 6. Be2 { [%eval -0.26] [%clk 0:32:19] } 6... O-O { [%eval -0.25] [%clk 1:11:35] } 7. O-O { [%eval -0.29] [%clk 0:31:36] } 7... c5 { [%eval -0.25] [%clk 1:11:41] } 8. Ne5 { [%eval -0.37] [%clk 0:28:23] } 8... h6 { [%eval -0.32] [%clk 1:12:02] } 9. d3 { [%eval -0.32] [%clk 0:26:31] } 9... Nc6 { [%eval 0.22] [%clk 1:12:20] } 10. Nxc6 { [%eval 0.26] [%clk 0:22:38] } 10... bxc6 { [%eval 0.32] [%clk 1:12:46] } 11. Nd2 { [%eval 0.18] [%clk 0:22:09] } 11... Qb6 { [%eval 0.22] [%clk 1:10:42] } 12. g4 { [%eval -0.03] [%clk 0:19:57] } 12... Bh7 { [%eval 0.07] [%clk 1:10:59] } 13. Qe1 { [%eval -0.42] [%clk 0:12:48] } 13... c4 { [%eval -0.53] [%clk 1:10:48] } 14. Qg3 { [%eval -0.42] [%clk 0:09:56] } 14... Qa5?! { [%eval 0.21] } { Inaccuracy. Bb4 was best. } { [%clk 1:08:56] } 15. Nf3 { [%eval 0.19] [%clk 0:08:36] } 15... c3 { [%eval 0.31] [%clk 1:04:53] } 16. Bc1 { [%eval 0.29] [%clk 0:08:48] } 16... Nd7?! { [%eval 0.91] } { Inaccuracy. c5 was best. } { [%clk 1:04:55] } 17. h4? { [%eval -0.43] } { Mistake. g5 was best. } { [%clk 0:01:44] } 17... c5 { [%eval -0.38] [%clk 1:04:08] } 18. g5 { [%eval -0.38] } 18... h5 { [%eval 0.0] [%clk 1:00:53] } 19. Ne1 { [%eval -0.03] } 19... Bg6 { [%eval -0.09] [%clk 0:59:18] } 20. Qg2 { [%eval -0.17] } 20... c4 { [%eval 0.12] [%clk 0:47:40] } 21. bxc4 { [%eval 0.15] } 21... dxc4 { [%eval 0.13] [%clk 0:44:43] } 22. d4 { [%eval 0.21] } 22... Nb6 { [%eval 0.16] [%clk 0:41:29] } 23. e4 { [%eval 0.09] } 23... Rad8 { [%eval 0.17] [%clk 0:40:14] } 24. Be3 { [%eval 0.25] } 24... Ba3 { [%eval 0.27] [%clk 0:38:15] } 25. Rd1 { [%eval 0.27] } 25... Qb5 { [%eval 0.03] [%clk 0:33:29] } 26. Qf3 { [%eval 0.05] } 26... Qc6 { [%eval 0.48] [%clk 0:30:18] } 27. f5 { [%eval 0.57] } 27... exf5 { [%eval 0.81] [%clk 0:30:38] } 28. exf5 { [%eval 0.73] } 28... Qxf3 { [%eval 0.87] [%clk 0:31:02] } 29. Rxf3 { [%eval 0.81] } 29... Bh7 { [%eval 0.82] [%clk 0:31:12] } 30. Ng2 { [%eval 0.85] } 30... Rfe8 { [%eval 0.84] [%clk 0:30:04] } 31. d5? { [%eval -0.64] } { Mistake. Rb1 was best. } 31... Re4 { [%eval -0.15] [%clk 0:25:48] } 32. Rff1 { [%eval -0.53] } 32... Re5 { [%eval -0.93] [%clk 0:18:24] } 33. g6 { [%eval -1.32] } 33... fxg6 { [%eval -1.69] [%clk 0:18:15] } 34. Bxb6 { [%eval -1.94] } 34... axb6 { [%eval -2.11] [%clk 0:17:55] } 35. Bxc4 { [%eval -1.99] } 35... gxf5?! { [%eval -1.34] } { Inaccuracy. Bc5+ was best. } { [%clk 0:14:40] } 36. Nf4 { [%eval -1.57] } 36... Bd6 { [%eval -1.53] [%clk 0:13:07] } 37. Bd3 { [%eval -1.77] } 37... Ra8 { [%eval -1.63] [%clk 0:12:18] } 38. Nxh5? { [%eval -3.38] } { Mistake. Rb1 was best. } 38... Rxa2? { [%eval -1.48] } { Mistake. Re3 was best. } { [%clk 0:12:16] } 39. Ra1 { [%eval -1.51] } 39... Ra5 { [%eval -1.68] [%clk 0:11:57] } 40. Rae1?? { [%eval -4.68] } { Blunder. Rfb1 was best. } 40... Rxe1 { [%eval -4.52] [%clk 0:11:35] } 41. Rxe1 { [%eval -4.4] } 41... Bg6 { [%eval -4.42] } 42. Be2 { [%eval -5.31] } 42... Ra4 { [%eval -5.08] } 43. Kg2 { [%eval -5.45] } 43... Rxh4 { [%eval -5.77] } 44. Ng3 { [%eval -5.65] } 44... f4 { [%eval -5.43] } 45. Nf1 { [%eval -5.71] } 45... Bxc2 { [%eval -5.6] } 0-1