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Subject: Re: hash tables

Author: Thomas Mayer

Date: 09:15:41 12/20/03

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Hi Kurt,

>     Size of hash tables seem to have much less influence
>     than I have imagined. This showed a test over 50 games
>     between Fritz 8 [96 MB hash] against Junior 8 [8 MB hash]
>     and a second 50 games match Fritz 8 [8 MB hash] vs Junior 8
>     [96 MB hash]. The final result was in both matches almost
>     identical [25m+10s].

when I remember correctly there was a difference between the results and the elo
difference was very near what I would expect when I take the Théron rule for
doubling hash size... (I call it Théron rule because he was the first one I saw
who made the statement that he guess that doubling hash size is around 7 Elo) -
afaik the difference was even slightly bigger then what we would expect
according to the above rule... but of course in the given margin of error of
EloStat...

A more relevant difference is to have hashtables or not to have them, especially
in endgame - e.g. against engines without any hashtables I have some chances to
win when I survive until the endgame - against engines WITH hashtables I usually
have no chance at all...

Greets, Thomas



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