Event: Round 7: Simiyu Jadon - Costa, Leopoldino
Site: https://lichess.org/broadcast/2025-african-junior-chess-championship-open/round-7/IJKKLLFx/LauE5y1t
Date: 2025-09-23
White: Simiyu Jadon
WhiteTitle: FM
WhiteElo: 2136
Black: Costa, Leopoldino
BlackElo: 1914
Result: 1-0
ECO: A08
Opening: Zukertort Opening: Reversed Grünfeld
Variant: Standard

1. Nf3 { [%eval 0.1] [%clk 1:30:47] } 1... d5 { [%eval 0.18] [%clk 1:26:22] } 2. g3 { [%eval 0.15] [%clk 1:31:11] } 2... c5 { [%eval 0.14] [%clk 1:26:06] } 3. Bg2 { [%eval 0.1] [%clk 1:31:29] } 3... Nc6 { [%eval 0.26] [%clk 1:25:05] } 4. d4 { [%eval 0.23] [%clk 1:30:52] } 4... Nf6 { [%eval 0.3] [%clk 1:23:13] } 5. O-O { [%eval 0.12] [%clk 1:31:14] } 5... e6 { [%eval 0.19] [%clk 1:23:16] } 6. a3 { [%eval 0.0] [%clk 1:30:14] } 6... cxd4 { [%eval 0.06] [%clk 1:22:21] } 7. Nxd4 { [%eval 0.05] [%clk 1:30:35] } 7... Bc5 { [%eval 0.06] [%clk 1:22:32] } 8. Nxc6 { [%eval 0.04] [%clk 1:30:53] } 8... bxc6 { [%eval 0.06] [%clk 1:22:42] } 9. b4 { [%eval 0.22] [%clk 1:30:52] } 9... Be7 { [%eval 0.2] [%clk 1:20:47] } 10. Nd2 { [%eval -0.16] [%clk 1:26:14] } 10... a5 { [%eval -0.08] [%clk 1:19:17] } 11. bxa5 { [%eval -0.12] [%clk 1:26:23] } 11... Qxa5 { [%eval -0.13] [%clk 1:18:07] } 12. a4 { [%eval -0.25] [%clk 1:26:03] } 12... O-O { [%eval -0.24] [%clk 1:16:25] } 13. Nb3 { [%eval -0.58] [%clk 1:26:20] } 13... Qc7 { [%eval -0.67] [%clk 1:16:06] } 14. Bb2 { [%eval -0.82] [%clk 1:23:01] } 14... Ba6 { [%eval -0.84] [%clk 1:13:48] } 15. Re1 { [%eval -0.8] [%clk 1:20:16] } 15... Rfb8 { [%eval -0.89] [%clk 1:10:06] } 16. e4 { [%eval -0.68] [%clk 1:18:53] } 16... Ne8 { [%eval -0.35] [%clk 0:57:06] } 17. h4 { [%eval -0.38] [%clk 1:12:10] } 17... Bc4 { [%eval -0.07] [%clk 0:54:37] } 18. Bf1?! { [%eval -0.65] } { Inaccuracy. Bc3 was best. } { [%clk 1:08:03] } 18... Bxb3?! { [%eval 0.31] } { Inaccuracy. Bxf1 was best. } { [%clk 0:34:25] } 19. cxb3 { [%eval 0.39] [%clk 1:08:26] } 19... Qb6 { [%eval 0.31] [%clk 0:31:20] } 20. exd5 { [%eval 0.39] [%clk 1:06:03] } 20... Bc5?? { [%eval 3.25] } { Blunder. cxd5 was best. } { [%clk 0:29:13] } 21. dxe6 { [%eval 3.0] [%clk 1:04:11] } 21... Qxb3?? { [%eval 6.42] } { Blunder. Bxf2+ was best. } { [%clk 0:25:41] } 22. Qxb3 { [%eval 6.46] [%clk 1:04:23] } 22... Rxb3 { [%eval 6.41] [%clk 0:25:46] } 23. exf7+ { [%eval 6.45] [%clk 1:04:45] } 23... Kf8 { [%eval 6.35] [%clk 0:25:22] } 24. fxe8=Q+ { [%eval 6.31] [%clk 1:04:58] } 24... Rxe8 { [%eval 6.38] [%clk 0:25:44] } 25. Rxe8+ { [%eval 6.36] [%clk 1:04:56] } 25... Kxe8 { [%eval 6.25] [%clk 0:26:07] } 26. Be5 { [%eval 6.12] [%clk 1:05:18] } 1-0