Wednesday, October 16, 2013

Gruenfeld Defense, Classical Exchange Variation

BORIS SPASSKY vs. JAN TIMMAN
Amsterdam, 1977

1. d4, Nf6
2. c4, g6
3. Nc3, d5
4. cxd5 ....

The starting point of the Exchange Variation.

4. .... Nxd5
5. e4, Nxc3
6. bxc3, Bg7
7. Bc4, 0-0
8. Ne2, b3
9. h4!, Nc6
10. Bd5, Qd7
11. h5! ...

The move signals an attack on Black's kingside.

11. .... Ba6
12. hxg6, hxg6
13. Nf4, e6
14. Qg4! ....

Black cannot capture the d5 Bishop because the pawn is pinned.

14. .... Rfd8
15. Bxe6!! ....

The sacrifice is necessary to break apart the defender-pawns.

 15. .... fxe6
16. Qxg6, Bc4
17. Qh7+, Kf7
18. Nh5, Rg8
19. Rh3!, Raf8
20. Nxg7!!, Rh8

If 20....Rxg7, then 21. Rf3+ Ke7, 22, Qxg7+ Kd8, 23. Rxf8+ and White wins the exchange.

21. Rf3+, Ke7
22. Ba3+, Nb4
23. Bxb4+, c5
24. dxc5!!, Rxh7

To keep the pressure, White sacrifices his Queen.

25. cxb6+, Resigns

If 25....Kd8, then 26. Rxf8+ Qe8, 27. Rxe8+ Kd7, 28. Rd1+ Kc6, 29. bxa7.  The soon-to-be-resurrected Queen would be too much for Black to handle.

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