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Subject: Re:

Author: Harald Faber

Date: 05:41:15 12/23/98

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On December 23, 1998 at 08:29:49, Amir Ban wrote:

>>AFAIR it is "an engine's problem". Fritz sends kind of "new" signal which makes
>>some engines clear their hash tables what harms their strength.
>>Bob, Amir, short summary?
>
>AFAIK: Before each move the engine gets the position in the form of move history
>from the initial position. That's the way it was in Fritz5, and it didn't change
>in Junior5 and other 32-bit front-ends. There is no command to clear the hash
>table. This is an internal engine consideration.
>
>This is not a bug, it's as it's intended to work. It certainly doesn't force the
>engine to do anything it would rather not do, and since anyone who's written an
>engine for ChessBase was aware of how it works, I assume he would take care not
>to clear the hashtable if he thought that important.
>
>I don't know about Winboard engines, but since they were written to work in a
>different environment, it's quite possible that the way Fritz5 handles them is
>an unpleasant surprise, so for Winboard engines the term "bug" is more
>justified.
>
>Amir

What I ask myself in this case is: when is this behaviour a problem? Only in
engine-vs-engine games? Or also when someone plays against a winboard engine
because every move one makes clears the program's hash?



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