Spanish Game, Bird Variation

GARRY KASPAROV vs. KHALIFMAN
FIDE Moscow Grand Prix, 2002

1. e4, e5
2. Nf3, Nc6
3. Bb5, Nd4

The Bird Variation of Ruy Lopez Opening.

4. Nxd4, exd4
5. 0-0, c6
6. Bc4, d5
7. exd5, cxd5
8. Bb5, Bd7
9. Re1, Nd7
10. c4, a6
11. Bxd7, Qxd7
12. d3, 0-0-0
13. Nd2, Kb8
14. b4, dxc4
15. dxc4, Nc6
16. b5, axb5
17. cxb5, Nb4
18. Nc, Qf5

Black threatens Nc2.

19. Re5, Qc2
20. Bf4 ! ....

Attacking the opponent King and defending the Queen at the same time.

20. .... Qxd1
21. Rxd1, Ka8

If 21....Nxa2, then 22. Re2+ and White wins a piece.

22. a3!, f6
23. axb4, Resigns

Black has no defense against 24. Ra1+.  If 23.....fxe5, then 24. Ra1+ Kb8, 25. Bxe5+ Kc8, 26. Nb6 mate.