Here both players follow the main line but White deviates with 12.0-0-0 rather than the more usual 12.Qb6 or h3. Black seizes the opportunity to introduce early tactics which White overlooks, costing him the game.

The game started 1.e4 c5 2.Nf3 Nc6 3.d4 cxd4 4.Nxd4 e6 5.Be3 Qc7 6.Nc3 a6 (diagram)

7. a3?! b5 B48: The Sicilian Taimanov variation 8. f4 Bb7 9. Be2 Nf6 10. Bf3 10. Nxc6 Bxc6 (10... dxc6 11. O-O Rd8 12. Qe1 and both players have good chances) 11. Bf3= 10... Nxd4 11. Qxd4 h5! 12. O-O-ON more usual is Qb6 or h3 12... Rc8 13. h3? overlooking the tactics 13... Bxa3! ouch! 14. g4?? with worse to follow 14... Qxc3! 15. Qxc3 Rxc3 after this move White could resign 16. Rhe1 hxg4 17. hxg4 Rh2 17... Rh3 is even stronger 18. Rd2 Rxd2 19. Kxd2 Bxb2 20. Rb1 Rxe3 21. Kxe3 Bc3 22. g5 Ng8 23. Rh1 a5 24. Be2 Bc6 25. Kd3 25. Bxb5 Bxb5 26. Rb1 Bb4 27. c3 Bc5+ 28. Kd2 Bc6 29. Rb8+ Ke7 30. Kd3 was White's only remaining 'hope' 25... b4 26. Rh8 Kf8 27. e5 a4 0-1 There is no sensible way for White to stop the passed pawn.