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Subject: Tree search programs

Author: JW de Kort

Date: 04:53:59 05/25/03


Hi friends,

My chess engine currently has two search related problems.

1) Sometime a e.g. 8 ply search only returns a pv a say 4 or 5 or sometimes even
only one move. Can this be a result of using the hashtable?

2) The engine searches until a certain amount of time is spend. If the search
notices that the time has ran out, the search is stopped an beta is returned. I
think this is the correct thing to do. BUT the following happens: sometimes a 8
or 9 ply search is done and a correct move (at least a correct move in the eye
of my engine) is found but then suddenly a completely different move is
selected, most of the cases this is a blunder and often the evaluation drops
with about the score of a bishop because a bishop is lost. It is nice to have
written a enging playing like a human, but i would rather remove this problem.

Any suggestions where to look for?

thanks in advance

Jan Willem




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