Sicilian Defense, Nimzowitch Advance Variation

PAUL KERES vs. WILLIAM WINTER
Warsaw, 1935

1. e4, c5
2. Nf3, Nf6
3. e5, Nd5
4. Nc3, e6
5. Nxd5, exd5
6. d4, d6
7. Bg5, Qa5+
8. c3, cxd4
9. Bd3 ....

If 9. Nxd4, then Black fortifies its center by dxe5.

9. .... dxc3
10. 0-0, cxb2
11. Rb1, dxe5
12. Nxe5, Bd6
13. Nxf7!, Kxf7
14. Qh5+ ....

Seeing an opening, White begins to attack.

14. .... g6
15. Bxg6+, hxg6
16. Qxh8, Bf5
17. Rfe1, Be4

If 17....Bxb1, then 18. Qf6+ Kg8 19. Re8+ and mate follows.

18. Rxe4, dxe4
19. Qf6+ ....

Black resigns.  White would be able to capture the other Black Bishop with a strong attack.