Event: Round 1: 刘佳源 - 李博
Site: https://lichess.org/broadcast/10/round-1/Stka2O0q/NujxN4Ma
Date: 2025-10-24
White: 刘佳源
Black: 李博
BlackTitle: IM
Result: 0-1
ECO: B43
Opening: Sicilian Defense: Kan Variation, Knight Variation
Variant: Standard
TimeControl: 50+10

1. e4 { [%eval 0.18] } 1... c5 { [%eval 0.24] } 2. Nf3 { [%eval 0.2] } 2... e6 { [%eval 0.28] } 3. d4 { [%eval 0.4] } 3... cxd4 { [%eval 0.29] } 4. Nxd4 { [%eval 0.34] } 4... a6 { [%eval 0.42] } 5. Nc3 { [%eval 0.35] } 5... Qc7 { [%eval 0.39] } 6. Be3 { [%eval 0.0] } 6... Bb4 { [%eval 0.21] } 7. Qd3 { [%eval -0.08] } 7... Nf6 { [%eval -0.06] } 8. f3 { [%eval -0.26] } 8... d5 { [%eval -0.34] } 9. O-O-O { [%eval -0.45] } 9... Bxc3 { [%eval -0.47] } 10. Qxc3 { [%eval -0.48] } 10... Qxc3 { [%eval -0.39] } 11. bxc3 { [%eval -0.36] } 11... dxe4 { [%eval -0.42] } 12. Bc4?! { [%eval -1.07] } { Inaccuracy. c4 was best. } 12... b5 { [%eval -1.17] } 13. Bb3 { [%eval -1.05] } 13... Bb7 { [%eval -1.04] } 14. Rhf1 { [%eval -1.24] } 14... Nbd7 { [%eval -1.2] } 15. a4 { [%eval -1.27] } 15... exf3 { [%eval -1.27] } 16. gxf3 { [%eval -1.18] } 16... bxa4?! { [%eval -0.36] } { Inaccuracy. O-O was best. } 17. Bxa4 { [%eval -0.36] } 17... Rc8 { [%eval -0.3] } 18. Rd3? { [%eval -1.48] } { Mistake. Rfe1 was best. } 18... Bd5 { [%eval -1.48] } 19. Rfd1 { [%eval -1.47] } 19... O-O?! { [%eval -0.86] } { Inaccuracy. g6 was best. } 20. Nb3?? { [%eval -3.91] } { Blunder. Bxd7 was best. } 20... Ne5 { [%eval -3.92] } 21. R3d2 { [%eval -4.51] } 21... Nxf3 { [%eval -4.64] } 22. Rf2 { [%eval -4.99] } 22... Rc7 { [%eval -4.35] } 23. c4 { [%eval -5.2] } 23... Rxc4 { [%eval -5.08] } 24. Bc5 { [%eval -5.64] } 24... Rc3? { [%eval -3.19] } { Mistake. Rc8 was best. } 25. Rg2? { [%eval -5.59] } { Mistake. Bxf8 was best. } 25... Rc8 { [%eval -5.49] } 26. Re2 { [%eval -6.47] } 26... Bxb3 { [%eval -6.36] } 27. Bxb3 { [%eval -6.4] } 27... R3xc5 { [%eval -6.44] } 28. Rf2 { [%eval -6.35] } 28... Ne5 { [%eval -6.39] } 29. Rg1 { [%eval -8.78] } 29... Nd3+ { [%eval -8.67] } 0-1