[Event "Zurich"] [Site "?"] [Round "0"] [White "Bhend"] [Black "Petrosian"] [Result "0-1"] [ECO "B80"] [Opening "Sicilian: Scheveningen"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 e6 6. Be2 a6 7. O-O Qc7 8. a4 Nc6 9. Kh1 Be7 10. f4 O-O 11. Nb3 b6 12. Bf3 Bb7 13. Qd2 Rab8 14. g4 { This position is similar to the previous, but the advance of Pg4 is much better prepared. Only the White Queen is rather misplaced, blocking Bc1; but this is a temporary matter and White can now bring the Queen to f2 org2} 14... d5 $5 {Black could hardly have reckoned out all the detailed consequences of this move. The fact that White's Queen is at present hampering his development, and the fact that the weakening of his Kingside by Pg4 may prove to be serious were probably the considerations which most influenced him in choosing this dynamic pawn sacrifice} 15. exd5 Nb4 16. dxe6 Bxf3+ 17. Rxf3 Qb7 { Just as in the previous game the long diagonal plays an important part} 18. Kg2 (18. Qg2 Nxc2 $1 19. Rb1 Ne1 $19) 18... Nxg4 19. Qe2 f5 20. Nd1 { White's first task is to drive back the enemy cavalry by c3 and Nf2} 20... Rf6 $1 (20... -- 21. c3 Nc6 22. Nf2) 21. c3 Rg6 $1 {Extraordinarily well conceived. If the White King now gives up his protection of the Rook by 22. Kh1 the Black Knight will penetrate into the White's game with decisive power via c2} 22. cxb4 (22. --) (22. Kh1 Nc2 $1) 22... Ne5+ 23. Kf2 Bh4+ 24. Rg3 Ng4+ 25. Kg1 ( 25. Kf1 Bxg3 26. hxg3 Qh1#) 25... Bxg3 26. hxg3 Qd5 $1 27. Ra3 (27. e7 Re8) 27... Rh6 {Black makes it clear why he interpolated with ... Qd5!, for White can't play Qg2 for ... Qxe1+} 28. Nf2 (28. Qg2 Qxd1+) 28... Nxf2 29. Qxf2 (29. Kxf2 Rh2+) 29... Qh1# 0-1