[Event "Malta Olympiad"] [Site "?"] [Round "0"] [White "Kasparov"] [Black "Marjanovic"] [Result "1-0"] [ECO "E15"] [Opening "Queen's Indian: 4.g3 Bb7"] 1. d4 Nf6 2. c4 e6 3. Nf3 b6 4. g3 Bb7 5. Bg2 Be7 6. O-O O-O {So far, we ave a boring old Queen's Gambit. But now I adopt a vigorous sacrifice that was popular briefly around 1980, thanks to the patronage of Grandmaster and theoretician Lev Polugayevsky.} 7. d5 exd5 8. Nh4 {This unleashes the power of the bishop on the h1-a8 diagonal. The departure of the pawn from e6 makes the f5-square available.} 8... c6 9. cxd5 Nxd5 10. Nf5 {In the past dozen years this position has been carefully examined, and the revised Encyclopedia of Chess Openings had to devote a lot of discussion to it. At the time, however, it was not clear what the best move for Black was.} 10... Nc7 { This move has survived the test of time.} 11. Nc3 d5 {Black establishes his stake in the center. White must react quickly to reduce Black's central control.} 12. e4 Bf6 13. exd5 {Now 13.Bf4 is more established, but White cannot establish any advantage against best play.} 13... cxd5 { 13...Nxd5 14.Nxd5 cxd5 15.Ne3} 14. Bf4 Nba6 15. Re1 {This is the critical position. Now it seems that Black can equalize with an attack on the f5-square. } 15... Qd7 {A serious mistake, which walks into a powerful pin on the h3-c8 diagonal. 15...Bc8 16.Qh5 g6 17.Nh6+ Kg7 18.Qf3 Bg5 was seen in a 1986 game. Black has no problems.} 16. Bh3 {I have a strong threat here. Do you see it? Suppose Black plays Re8. How would I win?} 16... Kh8 {16...Rfe8 17.Nh6+} 17. Ne4 {This move takes advantage of the new pin on the d-file.} 17... Bxb2 { Who cares about such minor pawns!} 18. Ng5 Qc6 { 18...Bxa1 19.Qxa1 f6 20.Re7 Qd8 21.Rxg7} 19. Ne7 Qf6 { Now I finish up with a simple combination.} 20. Nxh7 Qd4 {20...Kxh7 21.Qh5+} 21. Qh5 g6 22. Qh4 Bxa1 {Nothing matters now.} 23. Nf6+ { Here Black resigned, because mate comes quickly.} 23... Kg7 24. Qh6+ Kxf6 25. Bg5# 1-0