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Subject: Re: What is the most difficult MATE to find for a computer program ???

Author: Dann Corbit

Date: 14:30:54 12/27/00

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On December 27, 2000 at 17:23:37, Uri Blass wrote:
[snip]
><snipped>
>>Chest is the best mate finding program unless you need a deep tablebase search
>>to find it.  That is because it is a special purpose checkmate finding program
>>and the mates it discovers are provably shortest.  It also usually finds mates
>>faster that ordinary chess playing programs on the same hardware.
>
>I think that it dependent on the position.
>If there is a short mate you are right but if the mate is a long mate like mate
>in 10 moves then I expect chess programs to be faster in most of the cases.

Depends.  If mate in 10 is the shortest mate, then chest will probably still be
faster.  If there is a mate in 15 that is easily forced, then the program will
find it faster, but maybe not the mate in 10.

To find "a mate" chess programs will sometimes be faster.  To find the shortest
mate, it will be very rare that the chess program can beat chest.  To prove that
the mate is shortest also, I think chest is the only game in town.



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