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Subject: Re: Intelligent software, please

Author: Steve Maughan

Date: 14:10:37 11/26/01

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Christophe,

>>I never tried the idea to evaluate based on depth so from experience I
>>can not say the idea is good or bad. The downside of your above idea I
>>can imagine is that for instance a Nc7xa8 rook capture is rejected at a
>>15/16 ply depth while it is really needed to take the rook.

Hmmm, not sure that this is a problem.  It will only be rejected at 15/16 ply if
the knight really cannot get out.

>I have considered this, but I'm not going to do it (not in the near future)
>because of problems with the hash table. The hash table can store scores and
>bounds found by different iterations, and if the positional weights are not
>consistent from iteration to iteration then the scores stored in the hash
>tablesare not going to be consistent either.
>
>I think it's a major problem. It would maybe not hurt much in the middlegame,
>but I fear it would kick badly in the endgame.

Good point - maybe a better approach would be to base it on the speed of play
i.e. classify some terms as speculative and tune them down for fast play - up
for slow play.  This way you'd have the same weights from iteration to
iteration.  Just a thought!

Regards,

Steve



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