Author: Sune Larsson
Date: 05:08:01 03/09/01
[D]8/6b1/4k2p/p1p1p1p1/2P1K1P1/PP3N1P/8/8 w - - 0 1
Cortlever, 1940
Knight vs bishop and 5 pawns each. The black pawns are tied to squares
of the same color as the bishop. This is the classic "bad bishop" and
the position is won for white. But how to do it? Putting the knight
on f5 and then create Zugzwang for black with a4, doesn't seem enough
for a win...
Test: Can your program win this position, playing white?
The solution, with lines by the author, further down.
Sune
Cortlever,N
1940
1.h4!
[1.Ne1? Bf8 2.Nd3 Bd6 3.a4 Bf8 4.Nxe5 Bd6;
1.Nd2 Bf8 2.Nf1 Bd6 3.Ng3 Be7 4.Nf5 Bf8 5.a4 Bd6! 6.Nxd6 (6.Nxh6 Be7) 6...Kxd6
7.Kf5 e4 8.Kxe4 Ke6]
1...gxh4 2.Nxh4 Bf8 3.Nf3 Bd6 4.Ne1 Kf6
[4...Bf8 5.Nd3 Bd6 6.a4 Bf8 7.Nxe5 Bd6 8.Nd3 Bf8 (8...Be7 9.Nf4+ Kf6 10.Nd5+)
9.Nf4+ Kf6 10.Kd5 Kg5 11.Ne6+]
5.Kd5 Bb8 6.Kxc5 Kg5 7.Kd5 Kxg4
[7...Kf4 8.Nd3+ Kxg4 9.Nxe5+]
8.Ke4 Bd6
[8...h5 9.b4 axb4 10.axb4 h4 11.c5 Ba7 12.Nf3]
9.Nc2 h5 10.b4 axb4 11.axb4 h4 12.Ne3+ Kg3 13.c5 1-0
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