. e4 c5 2. Nf3 Nc6 B30 Sicilian Defense: Old Sicilian 3. Bc4 e6 4. Nc3 Nf6 5. d4 cxd4 6. Nxd4 Nxd4?! (0.00 → 0.61) Inaccuracy. Best move was d5. (6... d5 7. exd5 exd5 8. Bb5 Bd7 9. O-O Be7 10. Nf3 Be6 11. Nd4) 7. Qxd4 b6 8. e5 Ng8?! (1.10 → 1.81) Inaccuracy. Best move was Bc5. (8... Bc5) 9. O-O?! (1.81 → 0.95) Inaccuracy. Best move was Ne4. (9. Ne4 Bc5 10. Nxc5 bxc5 11. Qxc5 Ne7 12. O-O Bb7 13. Bd3 Qb6 14. Qxb6 axb6 15. Be3 O-O) 9... Ne7 10. Be3 g6? (0.80 → 3.04) Mistake. Best move was Nf5. (10... Nf5 11. Qf4 Bb7 12. Bd3 Nh4 13. f3 Ng6 14. Qg3 Be7 15. Nb5 O-O 16. Qh3 Qb8 17. f4) 11. Bg5 Bg7 12. Qd6?? (3.13 → -0.06) Blunder. Best move was Qe4. (12. Qe4 Rb8) 12... Bb7? (-0.06 → 0.98) Mistake. Best move was Nf5. (12... Nf5 13. Bxd8 Nxd6 14. exd6 Kxd8 15. a4 Bb7 16. a5 h5 17. Rfd1 h4 18. Be2 Bc6 19. axb6) 13. Nb5 Rc8 14. b3?! (1.03 → 0.46) Inaccuracy. Best move was Rfe1. (14. Rfe1 h6) 14... a6 15. Nd4?! (0.49 → -0.24) Inaccuracy. Best move was Nc7+. (15. Nc7+ Rxc7 16. Bxe7 Bxe5 17. Bxd8 Bxd6 18. Bxc7 Bxc7 19. Be2 Ke7 20. c4 g5 21. Rad1 h5) 15... b5 16. Bd3 Nf5?? (-0.41 → 3.85) Blunder. Best move was h6. (16... h6 17. Bf6 Bxf6 18. exf6 Nd5 19. Be4 Qc7 20. Qxc7 Rxc7 21. Bxd5 Bxd5 22. Rfe1 d6 23. Re3) 17. Nxf5 Qxg5 18. Nxg7+ Kd8 19. Qb6+? (3.63 → 1.58) Mistake. Best move was g3. (19. g3 Qe7 20. Qd4 Qc5 21. Qf4 Kc7 22. a4 Rcg8 23. Be4 Qd4 24. Rfe1 Bxe4 25. Rad1 Qc3) 19... Rc7 20. a4?? (1.81 → Mate in 1) Checkmate is now unavoidable. Best move was f3. (20. f3 Qxe5 21. a4 b4 22. Be4 d5 23. Nxe6+ fxe6 24. Bd3 Kd7 25. Qxb4 Qd6 26. Qg4 Kc8) 20... Qxg2# Black wins by checkmate. 0-1