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Subject: Re: rebel10 bug?

Author: Ernst A. Heinz

Date: 05:20:53 10/20/98

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On October 20, 1998 at 08:08:23, Robert Hyatt wrote:
>
>Quite easy.  With alpha/beta the only "order" we have is (1) best move and
>(2) rest of moves.  There is no "order" to the moves other than one move is
>better than all the rest.  No idea how much better, no idea where the other
>moves rank with respect to each other...

In order to avoid wide-spread confusion, I would like to add that Bob's above
statement implicitly assumes "alpha-beta" to mean "PVS/NegaScout" as employed
by most chess programs.

Pure alpha-beta without null-window searches and eager resolution of any
fail-high/fail-low situations can of course calculate accurate search scores
of all moves. But it would be horribly inefficient as compared to PVS (yet
still much better than naive minimax).

=Ernst=



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