After sacrificing a pawn in the opening, Fischer exploited his development lead, opening the long black diagonal with 15. Nf5] Since 15 . . . Nxf5 16. exf5+ or 15 . . . gxf5 16. Bxg7 would be disastrous, Black must play 15 . . . Bxb2. There followed 16. Ncxd6+] (16. Nfxd6+? Ke7 gets nowhere) Kf8 17. Nxh6.
Black can hardly consider 17 . . . Bxa1 18. Qxa1 when after 18 . . . Ke7, White can simply play 19. Nxb7 Qxb7 20. Qe5+ Kd7 21. Rd1+ winning quickly. But Spassky's 17 . . . f6 forced Fischer to find something deep.
The obvious point of his 18. Ndf7]] was to win the exchange after 18 . . . Qxd1 19. Raxd1 Ke7 20. Nxh8 Rxh8, but Black's bishop pair and passed a-pawn and White's apparently offside knight make it unclear who stands better. 21. Nf5+]] clarified everything. After 21 . . . gxf5 22. exf5+, any king move is met by a fatal check on d7 or d8, so Black must play 22 . . . Be5 when 23. f4 regained the piece with a winning position (though still not easy).
Fischer had to see all this when playing 18. Ndf7, and probably envisaged it with 15. Nf5] As I may have said before, Bobby is back.Reuse content