Author: Heiner Marxen
Date: 11:52:18 02/17/01
Go up one level in this thread
On February 15, 2001 at 06:10:16, leonid wrote:
>Hi!
>
>If you like solve one forced mate, you can try this:
>
>[D]3BQnQN/3b3q/2Q3rn/KR2Qqbk/1R2Qqrn/2Q4b/3b1n1q/1Q1BQ1QN w - -
>
>Please, indicate your result.
>
>If you could bring one position of forced mate found during the chess
>chapionship (human player) it will be very appreciated.
>
>Thanks,
>Leonid.
If I followed correctly the answers of the others, this has solutions
in nine moves. After 26 hours on a K7/600 (350 MB hash) Chest found
a mate in 8 moves, that does not start with a checking move, and leaves
black with 35 legal answers. Obviously, that is not the path the playing
programs like to follow. ;-)
Here are the main lines after 1.Qxh7, one for each answer:
Bxd8+ Qxd8 Nxh7 Ng3+ Qhxg3 Qxh4+ Kxh4 Qcxg3+ Rxg3 Nxg6+ Kg5 Qe7+ Nf6 Qexf6#
Bxe8 Bxg4+ Bxg4 Qxg4+ Nxg4 Q4xf5 Bc1 Ng3+ Qfxg3 Qhxg6+ =*= Qxg5+ Bxg5 Qxg5#
Be6 Qxh2 Bc4 Ng3+ Qxg3 Q4xf5 Be2 Nxg6 Nf3 Nxf8+ Kh4 Qhxh6#
Bxc6 Qxg4+ Bxg4 Q4xf5 Bd5 Qxh6+ Kxh6 Qexg6+ Nfxg6 Qg7+ Kh5 Qh7#
Q4xe4 Qxg4+ Bxg4 Qhxg6+ Nfxg6 Qcxg6+ Nxg6 Qxg6+ Kh4 Qxh6+ Bh5 Qxh5#
Be7 Qhxg6+ Nfxg6 Qexg6+ Nxg6 Qxg6+ Kh4 Bxe7+ Qf6 Qeh5#
Bf6 Qcxf6 Q4g5 Qgxh2 Bf4 Ng3+ Bxg3 Qxg5+ Qxg5 Qxg5#
Bxc3 Qhxg6+ Nfxg6 Qexg6+ Nxg6 Qxg6+ Qxg6 Qxg6+ Kh4 Qxh6#
Bxe1 Qhxg6+ Nfxg6 Qexg6+ Nxg6 Qxg6+ Qxg6 Qxg6+ Kh4 Qxh6#
Q5xe4 Qhxg6+ Nfxg6 Qexg6+ Nxg6 Qxg6+ Qxg6 Qxg6+ Kh4 Qxh6#
Qe6 Qxh6+ Kxh6 Q8xg6+ Nhxg6 Qxg6+ Nxg6 Qg7+ Kh5 Qh7#
Qf3 Qhxg6+ Nfxg6 Qexg6+ Nxg6 Qxg6+ Qxg6 Qxg6+ Kh4 Qxh6#
Qf6 Qxh6+ Kxh6 Q8xg6+ Qxg6 Qexg6+ Nfxg6 Qg7+ Kh5 Qh7#
Qf7 Qxh6+ Kxh6 Qexg6+ Qxg6 Qexg6+ Nfxg6 Qg7+ Kh5 Qh7#
Qfg3 Qhxg6+ Nfxg6 Qexg6+ Nxg6 Qxg6+ Qxg6 Qxg6+ Kh4 Qxh6#
Qhg3 Qhxg6+ Nfxg6 Qexg6+ Nxg6 Qxg6+ Qxg6 Qxg6+ Kh4 Qxh6#
Ne6 Qhxg6+ Nxg6 Qxg6+ Qxg6 Qxg6+ Kh4 Qxh6#
Nf3 Qxh6+ Bxh6 Qexg6+ Nxg6 Qxg6+ Rxg6 Qxg6#
Ng2 Qxh6+ Kxh6 Qexg6+ Nxg6 Qxg6+ Qxg6 Qxg6#
Nxd1 Qhxg6+ Qxg6 Q8xg6+ =*= Qexg6+ Nxg6 Qcxg6#
Nxh7 Qexg6+ Nxg6 Qxg6+ Qxg6 Qxg6+ Kh4 Qxh6#
Q5xe5 Qxh6+ =*= Q8xg6+ =*= Qexg6+ Nxg6 Qcxg6#
Nd3 Qxh4+ Bxh4 Qhxg6+ Nxg6 Qexg6#
Nxe4 Qxh4+ Bxh4 Qhxg6+ Nxg6 Qexg6#
Nxh1 Qxh4+ Bxh4 Qhxg6+ Nxg6 Qexg6#
-*- Qhxg6+ Nfxg6 Qexg6+ Nxg6 Qxg6+ Qxg6 Qxg6+ Kh4 Qxh6#
Legend: =*= any legal move
-*- any other legal move
Heiner
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