Saturday, January 15, 2011

Nimzo-Indian Defense: Gligoric System Exchange

LEV POLUGAEVSKY vs. TIGRAN PETROSIAN
URS Championship, 1960

1. d4, Nf6
2. c4, e6
3. Nc3, Bb4
4. e3, 0-0
5. Bd3, d5
6. Nf3, c5
7. 0-0, dxc4
8. Bxc4 ....

The Gligoric System Exchange of the Nimzo-Indian Defense.  This opening focuses on the control of b3-g8 diagonal and takes advantage of white central squares.

8. .... b6
9. Qe2, Bb7
10. Rd1, Nbd7
11. d5!! ....

White now opens the intended diagonal.

11. .... Bxc3
12. dxe6, Ba5

If 12....fxe6, then 13. Bxe6+ Kh8, 14. Ng5 threatening Nf7+ and e7.

13. exd7 ....

Through subtle play, White regains his Knight....

13. .... Qc7
14. e4 ....

White provides a way for his stranded Bishop at c1.

14. .... Nxd7
15. Ng5, Rad8
16. Bxf7+, Rxf7
17. Ne6, Qc8
18. Nxd8, Ba6
19. Qe3, Re7

If 19....Qxd8, then 20. e5 Re7, 21. e6! which is advantageous to White.

20. Qb3+, c4
21. Qa3, Nc5

Still 21....Qxd8 is not plausible because of 22. Bg5 pinning the Rook.

22. Be3, Rxe4
23. Bxc5, Qxc5
24. Qf3  Resigns

White threatens Qxe4 and Qf7+. Now, if 24....Re7, then 25. Ne6 threatening Nxc5 and Qf8 mate and Rd8 mate.  A superb performance!

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