Sicilian Defense, Botvinnik Defense I Edge Variation

ISTVAN BILEK vs. FLORIN GHEORGHIU
Bucharest, Romania, 1968

1. e4, c5
2. Nc3, Nc6
3. g3, g6
4. Bg2, Bg7
5. d3, d6
6. f4, e5
7. Nh3, Nge7

The Botvinnik Defense I, Edge Variation.

8. 0-0, 0-0
9. f5, gxf5
10. exf5, Bxf5
11. Rxf5!! ....

A necessary sacrifice to open up the e4-h7 diagonal.

11. .... Nxf5
12. Be4, Nfd4
13. Qh5, Re8

If 13...f5, then 14. Ng5 h6, 15. Bd5+ Kh8, 16. Qg6 (threatening Qh7 mate) hxg5, 17. Qh5+ Bh6, 18. Qxh6 mate.

If 13....h6, then 14. Bxh6 gxh6, 15. Qxh6 f5, 16. Bd5+ Rf7, 17. Ng5 with a good game for White.

14. Qxh7+, Kf8
15. Bg5, Qd7

If 15....f6, then 16. Bd5 fxg5, 17. Qg8+ Ke7, 18. Qxg7 mate.

16. Nd5, Re6

If 16....f6, then 17. Nxf6 Qe6, 18. Bd5 with a good game for White.

17. Rf1, Nxc2
18. Bg6!! ....

Taking advantage of the pin, White presses on with the attack.

18. .... N2d4
19. Bh6!!, Resigns

If 19....Bxh6, then 20.Qh8 mate. The same mating move follows after 19....g6 or g5.