[Event "USSR"] [Site "?"] [Round "0"] [White "Kupreichik"] [Black "Kasparov"] [Result "0-1"] [ECO "B45"] [Opening "Sicilian: Taimanov, 5.Nc3"] 1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nc6 5. Nc3 d6 6. Be2 {The first surprise. Kupreichik usually chooses a more aggressive system, involving f2-f4 and Qf3.} 6... Nf6 7. Be3 Be7 8. f4 O-O 9. Qd2 {Kupreichik remains true to himself, heading for a complicated position with opposite side castling. White's chosen plan seems quite promising, since there are good prospects for a kingside pawnstorm.} 9... e5 {An energetic Black counterblow in the center, turns the game into different channels.} 10. Nf3 { 10.Nf5 Bxf5 11.exf5 d5 gives Black an initiative.} 10... Ng4 11. f5 {Now all th at remains for White is to play 12.Nd5 and his advantage will be beyond doubt. But as so often happens, that one tempo just isn't there.} 11... Nb4 { With the threat of 12...Nxe3 and 13...Nxc2 winning White's queen.} 12. Bd3 { 12.O-O-O d5 13.a3 Nxe3 14.Qxe3 d4 15.Qf2 Qc7 with an attack on the White king.} 12... d5 13. Nxd5 Nxd5 14. exd5 e4 {The unfortunate position of White's pieces and especially of his king makes this combination possible. The coming pin on the e-file destroys White, aided by the diagonal pins on c1-h6 and g1-a7.} 15. Bxe4 Re8 {Now the combination yields two almost symmetrical variations, depending on which side White castles.} 16. O-O-O { Black's task would have been much more complicated after 16.O-O.} 16... Bf6 { A powerful move which opens the open file for the Black rook while taking command of the a1-h8 diagonal.} 17. Bg5 {Having come to terms with the unavoidable loss of a piece, White vainly tries to exploit Black's slightly backward development. 17.h3 Nxe3 18.Qxe3 Bxf5 19.Nd2 allows Black to win material.} 17... Rxe4 18. h3 Ne5 19. Bxf6 Qxf6 20. Nxe5 Qxe5 21. g4 Bd7 { The rest is a matter of technique.} 22. Rhe1 Re8 23. Rxe4 Qxe4 24. Qa5 { This hastens the inevitable. 24.b3 would have been more solid, and allowed further resistance.} 24... Qe3+ 25. Kb1 Qxh3 26. Qxa7 Qxg4 27. Rc1 Bxf5 28. Qxb7 h5 29. b3 Qd4 30. a4 Qc3 0-1