Central New England Super-Booster, 1968.
White: Col. G. L. Sicherman
Nimzo-Indian Defense
Black: A. Sadowsky
1. d4 Nf6; 2. c4 e6; 3. Nc3 Bb4; 4. Qc2.
In club play I had won several games like this with early kingside attacks.
4...Nc6; 5. Nf3 O-O; 6. Bg5.
A natural reaction to Black's early castling.
6...Be7?
Inconsistent and cramping.
7. e3.
The aggressive 7. e4 would lead to exchanges after 7...d5, and I wanted to keep the b1-h7 diagonal open for that kingside attack!
7...Re8.
This would be a good place for the Rook if the Bishop weren't blocking it.
8. a3.
To play 9. Bd3 without allowing 9...Nb4. Black assumes that I mean to expand on the queenside and obligingly wastes a move.
8...a5; 9. Bd3 g6.
Another positional blunder, but Black would be badly off after 9...h6 too.
10. h4 Nh5!?
Black tries to exchange some pieces, but it's too late.
11. g4 Ng7; 12. d5.
Finally losing patience, Black opens the h-file at the worst possible time.
12...B:g5; 13. hg Ne7; 14. Ne4 ed; 15. Nf6+ Kf8; 16. N:h7+ Kg8; 17. Nf6+ 1:0.
It's mate after 17...Kf8; 18. Rh8+ Ng8; 19. R:g8+ Ke7; 20. N:d5+ Ke6; 21. Nd4+ Ke5; 22. f4+ Kd6; 23. c5+ K:d5; 24. Qc4#.