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Subject: Pruning problems

Author: Jari Huikari

Date: 06:08:13 09/14/98


One my friend explained so well that even I understood the principle
of pruning search tree in chess program:

I have found value for a move, by taking look for opponents possible
replies to it. When I evaluate next move, it's enough to find the first
opponents reply, which means worse score than that of previous move's.
And I don't have to take look to more replies, because I know previous
move was better.

Implementing this however made my program play strange moves, sacrificing
queens for no reason and that kind of things.

Now I ask, why that could be. Are there depths in iterative deepening,
which should be searched all the replies and exactly how bad reply
could be found, without doing a cutoff?

					Jari



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