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Subject: Re: Hashing and draw by repetition

Author: Bruce Moreland

Date: 01:31:40 08/26/99

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On August 26, 1999 at 03:23:43, Inmann Werner wrote:

>Hello
>
>When I began to implement hashing, I tried to use all "tricks" to avoid draws
>by repetition going into the hash tables, because I thought, this would be very
>bad.
>Yesterday I disabled this code and let also the draw by repetition evals into
>the hash tables, and surprisingly, the program worked better (at the complete
>LCTII Test)
>
>Do you also let "draw by repetition evals" into your hash tables?

It so happens that in mine is it as easy to avoid as to not avoid, so I avoid
it.  I doubt it matters much.

If you avoid it, you still have path-dependent scores in your hash table, which
will cause search instabilities.

As far as I can tell it is impossible to avoid this without hashing the entire
path taken to get to the position, which is insane and likely wrong.

bruce



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