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Subject: Re: kingsafety's king+pawn hash

Author: Robert Hyatt

Date: 14:31:34 02/27/06

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On February 26, 2006 at 12:47:24, Stuart Cracraft wrote:

>What is the current thinking now on this auxillary hash table.
>
>Worth it to hash the king and pawn structure?
>
>If so, is the entire pawn structure included in the hash or just
>the pawns around the king?


In Cray Blitz and early crafty versions, I had a separate king safety hash that
only factored in pawns (all of them) and the king's location...  In Crafty I
stopped that and hash the left side and right side pawn safety terms into the
pawn hash, then choose the right one in the EvaluateKings() code...  Saves the
memory for the extra hash and gets a higher hit rate as well.



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