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Subject: Re: Q: pawn hash?

Author: Umar Farooq

Date: 07:22:24 07/20/99

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On July 20, 1999 at 02:41:41, Dave Gomboc wrote:

>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.
No it is easy to remember
>
>>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. :-)
It is little bit difficult

>>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
Umar



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