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Subject: Re: If you would like to solve a mate...

Author: Heiner Marxen

Date: 04:21:26 04/17/01

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On April 10, 2001 at 07:25:57, leonid wrote:

>Hello!
>
>If you would like to crush some mate, where solution is not that far but
>resistance is visible, then you can solve this position:
>
>[D]2Qr1bqN/R3P1Rq/1p1q1q2/1Q4qk/q2QQr1n/1Q4r1/3BNqbQ/1B1K4 w - -
>
>Please indicate your result.
>
>If your program is shareware, it will be handy if you will indicate address of
>your program on the Web.
>
>Thanks,
>Leonid.

Within 6.3 minutes Chest (K7/600, 350MB hash) finds a mate in 8, with 5
possible key moves:
 e8=Q+
 e8=B+
 Nxf4+
 Nxg3+
 Qxh7+

Here are the PVs:

Nxf4+ Q2xf4  e8=Q+  Rxe8   Rxg5+  Q6xg5 Rxh7+  Bh6   Qexe8+ Qxe8 Qcxe8+ Qg6
Bxg6+  Kg4   Qxg3#

Nxg3+ Qxg3   e8=Q+  Rxe8   Rxg5+  Q8xg5 Rxh7+  Bh6   Qcxe8+ Qf7  Qxf7+  Qg6
Qexg6+ Kg4   Qxg3#

Qxh7+ Qxh7   Nxf4+  Q2xf4  Rxh7+  Bh6   e8=Q+  Rxe8  Qcxe8+ Qf7  Qxf7+  Qg6
Bxg6+  Kg4   Qxg3#

e8=B+ Rxe8   Nxf4+  Q2xf4  Rxg5+  Q6xg5 Rxh7+  Bh6   Qexe8+ Qxe8 Qcxe8+ Qg6
Bxg6+  Kg4   Qxg3#

e8=Q+ Rxe8   Nxf4+  Q2xf4  Rxg5+  Q6xg5 Rxh7+  Bh6   Qexe8+ Qxe8 Qcxe8+ Qg6
Bxg6+  Kg4   Qxg3#

Cheers, Heiner



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