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Subject: Re: Static Exchange Evaluation (SEE) for pruning in quiescence (?)

Author: Robert Hyatt

Date: 07:18:59 08/19/03

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On August 19, 2003 at 02:48:36, Omid David Tabibi wrote:

>It seems that some programs use Static Exchange Evaluation in order to prune
>losing captures in quiescence search. In the following position, an SEE will
>deem the move 1.Rxd7 a losing capture, and it might get pruned in quiescence.
>However, in fact this is a winning capture since Qf6 is attacked after 1.Rxd7.
>How do such programs solve these kind of problems?

The error is so infrequent it can be ignored.  I'm doing some hash collision
analysis at the moment and it is _eye-popping_.  The game tree, because of
its enormous size, is _very_ resistant to such errors...

>[D]3r2k1/pppb2pp/5q2/5p2/3R1P2/2B5/PPP3PP/5RK1 w - - 0 1

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