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Subject: Re: One mate to solve.

Author: Heiner Marxen

Date: 14:01:10 01/06/02

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On January 05, 2002 at 11:28:41, leonid wrote:

>On January 05, 2002 at 10:10:09, Gian-Carlo Pascutto wrote:
>
>>On January 05, 2002 at 08:54:04, leonid wrote:
>>
>>>[D]3k1q2/2nnrr2/1qBNRNq1/qQRQBqQP/qQqqqQ1Q/1bb1Q3/4P2K/8 w - -
>>>
>>>Please indicate your result.
>>>
>>>Thanks,
>>>Leonid.
>>
>>'Trivial'
>>
>>P: 0 D: 1705103883 N: 243144 S: 243143 Mem: 6.49M Iters: 3112 MaxDepth: 31
>>Time : 1.830000
>>This position is WON.
>>PV: d6f7 d8c8 c6d7 e7d7 c5c7 c4c7 b4f8 d7d8 f8d8 c7d8 e6c6 d8c7 c6c7 b6c7 f4f5
>>c7d7 f5d7
>>
>>1.8 seconds
>
>Selective time is excellent and slightly better that mine. For  mine it was 1.97
>sec. 13 moves. Celeron 600Mhz. No hash.
>
>It is still possible that somebody will find shorter mate by selective, or by
>brute force. Heiner have good chance to go far that me by brute force. When I
>galanced by curiousity into "Chest" result, even for identical conditions, its
>branching factor was better. With hash it have chance to look up to the end.
>
>Cheers,
>Leonid.
>
>>GCP

Hello Leonid, Hello Gian-Carlo (aka Mr.'Trivial' :-) !

Bad luck for Chest, this time.  It does not find a mate in 10, but needs
already over 5 hours for that and the EBF gets worse:

#  4      0.10s [  5.00]        4kN [  7.08]  1.07        508-         0
#  5      0.63s [  6.30]       26kN [  6.31]  1.27       3209-         0
#  6      3.69s [  5.86]      158kN [  6.00]  1.46      19409-         0
#  7     18.73s [  5.08]      809kN [  5.12]  1.74      95826-         0
#  8    137.70s [  7.35]     6881kN [  8.50]  1.87     666312-         0
#  9   1356.73s [  9.85]    73147kN [ 10.63]  1.98    6076071-    110972
# 10  18922.80s [ 13.95]  1048759kN [ 14.34]  1.88   79356137-  70608236

Currently I let it run on depth 11 with estimated 3 days to go.
An increasing EBF sometimes indicates that a solution is near.
(All this on my K7/600).

Cheers,
Heiner



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