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Subject: Re: Find a mate.

Author: Heiner Marxen

Date: 11:06:50 08/05/02

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On August 03, 2002 at 08:03:46, leonid wrote:

>Hi,
>
>In it my program was
>very slow and I don't know shortest mate. By selective mate was found in 10.
>
>[D]2bqkb2/1r4rR/nPPPPPPn/1pNppNp1/bNp2pNb/8/8/7K w - -

Hmmm, for Chest this was not _that_ difficult: on Athlon 1500+ with 128MB hash
Chest needs 12 minutes to find a unique mate in 8:

PV: cxb7 Bxe6 Nbxa6 Rxh7 Nc7+ Qxc7 f7+ Rxf7 dxc7 Nxf5 c8=Q+ Bxc8 bxc8=Q+ Ke7
Qd7#

Timing info:

#  4      0.12s [ 12.00]       28kN [ 18.36]  1.12       1524-         0
#  5      1.33s [ 11.08]      268kN [  9.60]  1.41      18117-         0
#  6     10.76s [  8.09]     2044kN [  7.62]  1.69     178538-         0
#  7     85.97s [  7.99]    15140kN [  7.41]  2.04    1604309-      4745
#  8    717.33s [  8.34]   114984kN [  7.59]  2.24   13960456-  10761223

I couldn't find anything unusual in Chest's statistics, so I've no idea
why this one is slow for you.

Cheers,
Heiner



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