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Subject: Re: extracting the best move from a MTD(f) search

Author: Andrew Williams

Date: 03:47:36 12/21/02

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On December 21, 2002 at 06:28:15, Joel wrote:

>Thanks Andrew.
>
>I see a definite problem with my implementation. Still a bit confused however.
>
>My understanding was that I only stored the 'best move' when the score was an
>exact one. Though, clearly this is a problem for MTD(f), since you never get an
>exact score.
>
>Does this mean I should be storing a move (if there is one) for scores which are
>lower or upper bounds?
>
>Joel

Yes. In any node if you find a move which returns a score which is >= beta,
store the move in the hash table for that node.

Andrew



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