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Subject: Re: Difficulties with 3-fold repetition when using hashing.

Author: Rémi Coulom

Date: 06:30:12 06/23/00


In The Crazy Bishop, I mark all positions from the game history (=past positions
in the game) which are in the hash table as unreliable (ie, do not use the eval,
but the best move is still useful) before starting a new search. Removing them
completely from the hash table would work too. This should solve your problem,
if I understood it well.

I also always test for 3-fold repetition before probing the hash table during
the search.

I think that the combination of these two things makes the search very safe in
respect of hash-table-related 3-fold repetition problems.

Remi

(I got a "Document contains no data" error when trying to reply to the original
message).



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