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Subject: Re: Crafty 19.13 bug? Mate in 1 position evaluated as draw

Author: Peter Skinner

Date: 14:28:14 06/03/04

Go up one level in this thread


On June 03, 2004 at 16:35:40, Robert Hyatt wrote:

>On June 03, 2004 at 16:28:33, Robert Allgeuer wrote:
>
>>On June 03, 2004 at 15:32:14, Günther Simon wrote:
>>
>>>On June 03, 2004 at 14:48:55, Robert Allgeuer wrote:
>>>
>>>>
>>>>In the following endgame position Crafty 19.13 (I have tried both the compiles
>>>>by Slater Wold and Dann Corbit) analyses this as a draw with score 0.00. Crafty
>>>>19.6 on the other hand correctly detects the mate in one.
>>>>
>>>>Winboard, hash 96 Mb, Athlon 2400+, all 5 piece EGTBs installed.
>>>>
>>>>[d]8/6P1/8/8/2b5/8/p1k2p2/K7 b - - 0 90
>>>>
>>>>Robert
>>>
>>>Hi Robert, which dates have your versions?
>>>Even if you had tried both named compiled ones, it's still
>>>possible that those are first releases of Crafty 19.13,
>>>which had a tablebase bug.
>>>
>>>Günther
>>
>>I am aware that there was this bug and consequently 2 different 19.13 versions,
>>therefore I downloaded after that, so I am pretty sure I have the corrected
>>version.
>>The compile of Slater Wold has been downloaded on 13.5.2004, the one from Dann
>>Corbit just a week ago.
>>Can anybody reproduce the result (with 5 piece EGTBs) or does Crafty 19.13
>>detect a mate for everybody else and it is a problem just on my machine? Corrupt
>>EGTBs cannot be the reason, because 19.6 uses exactly the same EGTB files.
>>
>>Robert
>
>
>I can not reproduce this.  I ran with 6=piece tables.  mate in 1.  With only 5
>piece tables, mate in 1.  With _no_ tables.  Mate in 1.

I as well can not reproduce this error at all. I have tried with 6,5,4,3,no
tablebases, and I get mate in 1 consistantly.

Someone else emailed me from the Crafty site about a week ago with a similiar
postition where Slator's for some reason couldn't find the mate, yet mine had no
problems.

I am wondering if his beta compiler is doing something funny to the code..

Peter



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