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Subject: Re: Ultra small pawn hash efficiency

Author: Robert Hyatt

Date: 08:07:38 11/21/02

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On November 21, 2002 at 08:26:48, Matthias Gemuh wrote:

>On November 21, 2002 at 08:15:50, Georg v. Zimmermann wrote:
>
>>On November 21, 2002 at 07:13:10, Vladimir Medvedev wrote:
>>
>>>depth = 9, from initial position:
>>>
>>>pawn hash = 1 entry -- 28% successful hits
>>>2  --  33%
>>>3  --  37%
>>>4  --  38%
>>>5  --  41%
>>>7  --  43%
>>>10 --  45%
>>>100 -- 60%
>>>...
>>>65K -- 84%
>>>
>>>I was quite surprised with this :)
>>>Even 1-node pawn "hash" helps a lot!
>>
>>Doesnt one get something around 99% with big tables ?
>
>
>
>With 2x65kB. More is not needed, if only pawns are considered.


There are more possible pawn positions than that.  White has 8, black has 8.
there are
48 possible squares any of them can be on...  That is a pretty big number.



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