Author: José Antônio Fabiano Mendes
Date: 06:00:52 03/02/04
Study by Noam Elkies, 1987
[D]6K1/8/1p5P/1P6/2P3n1/8/3k4/8 w
It's not hard to see here that 1. c5? Nxh6+ 2. Kf8 Nf5 3. cb Nd6 leads to a
draw. That means we must choose between 1. Kg7 Nxh6 2. Kxh6, and 1. h7 Nf6+ 2.
Kg7 Nxh7 3. Kxh7. Uh-huh, sure - what kind of difference is that, whether
White's king is on h7 or on h6? But since there is a difference, we must keep
looking, to see whether the difference in the king's positions will tell.
Approaching the problem in this fashion, we increase our chances of finding the
right reply.
1. h6-h7! Ng4-f6+ 2. Kg8-g7 Nf6xh7 3. Kg7xh7 Kd2-e3!
The only move - it's important to deprive the White queen, soon to appear on
the board, access to the f4 square.
4. c4-c5 b6xc5 5. b5-b6 c5-c4 6. b6-b7 c4-c3 7. b7-b8Q c3-c2
With White's king on h6, he could now try 8. Kg5!, but after 8...Kd2 (or
8...Ke2), Black is saved. But now there is a far more powerful resource
available.
8. Qb8-h2!! c2-c1Q
8...Kd3 9. Qf4 Kc3 10. Qc1.
9. Qh2-h6+ That's why the king couldn't be on the h6 square!
Source ==> http://www.chesscafe.com/dvoretsky/dvoretsky.htm
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