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Subject: Re: Junior-Crafty hardware user experiment - 19th and final game

Author: Uri Blass

Date: 11:35:53 12/25/03

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On December 25, 2003 at 14:04:47, Christophe Theron wrote:
<snipped>
>By experience, no smart evaluation can compensate for the loss of one ply of
>search. In theory evaluation could compensate, but in practice I don't think
>anybody has ever managed to do it.

I think that evaluation can compensate easily for loss of one ply of search and
not only in theory because it is easy to tell your evaluation to calculate the
result of 2 ply search.

Evaluation by definition is a function that get a position and returns a number.
If the target is not to play better but to prove that evaluation can compensate
for 1 ply search then you simply tell your evaluation to perform 2 plies search.

Note that some kind of search is already needed in smart evaluation even if you
do not make moves.

For example you cannot detect trapped pieces in evaluation without checking that
every square that they can go is threatened by the opponent.

You cannot detect forks in your evaluation without doing some kind of search.

Uri



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