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Subject: Re: One mate to solve.

Author: Heiner Marxen

Date: 15:58:08 07/31/01

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On July 31, 2001 at 15:16:35, Angrim wrote:

>On July 31, 2001 at 14:07:42, leonid wrote:
>
>>Hi!
>>
>>This position contain few heavy pieces and should be solvable by every program.
>>
>>[D]Rn1rk2r/QB4pN/1pn4p/pN2q1Pb/2P1p3/2p1P1Bq/P4Q1b/1K1R4 w - -
>>
>>Please indicate your result.
>>
>>Thanks,
>>Leonid.
>
>useing pn^2 on an Athlon 650mhz:
>
>proved that move b7xc6 wins, 10 turns
>PN2:4021544 evals, 180919 expands, 23.27 seconds
>
>Angrim

According to Chest your move is the unique key move for a mate in 9 moves:

PV: Bxc6+ Nxc6 Rdxd8+ Nxd8 Nc7+ Qxc7 Qxc7 Qd7 Qxd7+ Kxd7 Qf5+ Ne6 Ra7+ Kd8 Qd5+
Ke8 Qd7#

Needed 15.6 minutes on a K7/600 with 350 MB hash.
pn^2 appears to be quite a good mate finding method.

Cheers,
Heiner



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