Sicilian Defense, Najdorf Variation

BORIS SPASSKY vs. NUKHIM RASHOVSKY
USSR championship, 1973

1. e4, c5
2. Nf3, d6
3. d4, cxd4
4. Nxd4, Nf6
5. Nc3, a6
6. Bg5, e6
7. f4, Qc7
8. Bd3, N8d7
9. Qe2, b5
10. 0-0-0, Bb7
11. Rhe1, Be7
12. e5, dxe5
13. fxe5, Nd5
14. Bxe7, Nxc3
15. Qg4! ....

White sees possibilities on the kingside. He keeps Black from castling.

15. .... Nxd1

If 15....Kxe7, then 16. Nxe6 fxe6, 17. Qxg7+ Ke8, 18. Rf1!! and Black may either lose his Queen or get a back-rank mate.  A pretty continuation arises after 18....Kd1, 19. Qxh8+ Nf8, 20. Qxf8 Kd7, 21. Bxb5 mate.

16. Nxe6!!, Qc6

If 16.....fxe6, then 17. Qxe6 Qc6, 18. Bd6+ Kd8, 19. Rxd1 with a good attack for White.

17. Nxg7, Kxe7
18. Qg5+, f6

If 18.....Kf8, then 19. e6! fxe6, 20. Rf1+ and White wins.

19. exf6+, Kd8
20. f7+!!, Kc7

Forced. If 20....Nf6, then 21. Re8+ Rxe8, 22. Nxe8!!. White's additional pin on the Knight and queening pawn assures him of victory.

21. Qf4+, Resigns

The King has nowhere to go. If 21.....Qd6, then 22. Ne6+ Kc6, 23. Be4+....

If 22....Kc8 or 22....Kd8, White initiates mate by 23. Re8+.

If 22....Kb6, Black loses his Queen by 23. Re6.