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Subject: Re: hash, clearing hash, and percent of hash question

Author: Kurt Utzinger

Date: 12:19:36 12/10/01

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On December 10, 2001 at 03:08:03, Peter Berger wrote:

>On December 09, 2001 at 19:26:12, K. Burcham wrote:
>
>>
>>
>>
>>512 megs ram.
>>hash set at 256.
>>
>>some programs give percent of hash used during a game.
>>
>>using the above values, here is an example.
>>the percent of hash used starts at 0%.
>>as the program thinks the percent of hash value increases.
>>so as the percent of hash gets to 90%, is this 90% of 256 megs?
>>if this is 90% of 256 megs, and this 256 megs of ram is full of
>>data analyzied by the program, then what happens to all this information
>>after a move.
>>these percent of hash readouts are going back to 0% after each move.
>>my understanding is that none of the modern programs clear hash after
>>any move, so what does this 0 value indicate. 0% of what?
>>
>>kburcham
>
>I interpret the numbers just as you do. It seems that Shredder does clear
>hashtables between moves - I know The King ( Chessmaster 8000) does.

As far as I know the latest version of CM8 (TheKing 3.12d) does no longer clear
hashtables between moves. I remember that John Merlino reported this some time
ago when he replied to a query regarding differences in playing strenght between
the various releases of TheKing.eng.
Kurt



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