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Subject: Re: Strange error in Hiarcs 7.32 game

Author: Ralf Elvsén

Date: 11:54:05 02/02/02

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On February 02, 2002 at 09:24:40, leonid wrote:

>On February 01, 2002 at 02:44:18, Mike Hood wrote:

>
>Probably, every chess program should have one mate solver chained to its search
>for needed move. First work must be done by mate solver and only when mate not
>found, second part should be activated. Mate solver must look (my guess) 6 ply
>deep by brute force and later (if first search failed) 14 ply by selective. All
>search by mate solver must take 0.05 sec, or even less. So, enough time for
>second part of chess program to look for needed move, if mate is not found.
>
>By seeing efficency of brute force search done by Heiner's mate solver and speed
>of actual chips, I think that 4 move brute force search (before each move) is
>possible. Second selective search for mate could easily go as far as 8 moves.
>This way 1 move mate blunder will be impossible for ever in every program.
>
>Usually mate, in average game, is only between 2 and 5 moves deep.
>
>Leonid.
>
Hiarcs played the move becuase of a bug. Without the bug it would
have seen it of course. If it had a mate solver (btw, I don't believe
in using time for finding mates that in most cases the
ordinary search can find) there would be more code that could
be buggy :)

Ralf



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