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Subject: Re: Q: pawn hash?

Author: Dave Gomboc

Date: 23:41:41 07/19/99

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On July 20, 1999 at 02:20:03, Scott Gasch wrote:

>
>Ok, I've heard people talking about pawn hash tables and this got me thinking
>about them.  I am not sure how to do it --
>
>1) if you just hash 8 pawn locations and an associated evaluation that is pretty
>easy.  It's a nice small number, can fit in memory, etc... However, you can't
>recognize passed pawns becasue you don't know where the enemy pawns are?

Correct.

>2) if you make a table with all 16 pawns in all possible configurations I
>calculate a total of 1120853258472 possibilities.  That requires quite a bit of
>memory... ;)

Correct. :-)

>3) do you mean just hash the recent scores for pawn structures?  This way any
>node that has the same pawn structure anywhere in the tree can get the pawn
>score instantly?

Correct!

>Thanks,
>Scott

Dave



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