Computer Chess Club Archives




Subject: Re: Forced mate so solve...(proof number search)

Author: leonid

Date: 03:28:19 02/06/01

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On February 06, 2001 at 02:57:32, Angrim wrote:

>On February 05, 2001 at 07:23:58, leonid wrote:
>>If you like to solve forced mate position full of "depleted uranium"...
>>[D]NKBN4/QRQ3rR/2Qb2r1/N1b1nb2/B2nbbbB/1RNqqqq1/8/2N2k2 b - -
>>Please, indicate your result.
>Useing proof number search, with no chess knowlege other than which
>moves are legal and the definition of checkmate, on an Athlon 650mhz:
>:proved that move c5xa7 wins, 15 turns
>:PN:402888 evals, 9241 expands, 56 max ply,  1.96 seconds
>not the shortest win, but at least its fairly quick.


Can you give more detailed description of your search program? I am curious
since its base is probably identical to my mate solver. Mine use nothing more
but two parameters (not special value for each piece) that are legality of moves
and presence of check. It is everything that program need in order to find mate
or draw.


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