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Subject: Re: ICT4 Leiden: Schredder-Hydra 1-0 (mistake in Hydra book!!)

Author: Uri Blass

Date: 11:37:48 04/24/04

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On April 24, 2004 at 14:08:03, WAEL  DEEB wrote:

>Hi,
>What a disaster for Hydra!I am not it's biggest fan,but it's pity to lose in
>such a tragical way!The human are responsibal for this lose :-)


It is always the humans who are responsible.

Engines are developed by humans and it was a decision of the programmer to play
book moves in 0 seconds.

There is no rule in chess that an engine has to play moves in 0 seconds only
because they are part of the book.

When I work on implementing a real book for movei I do not plan to tell it to
play moves in 0 seconds in many cases.

I think that a book should include number of nodes for every position in the
book when the idea is that if you expect to be able to search more nodes then
you do not trust the book and search.

The idea is that in blitz you can expect more book moves to be better than the
moves that the engine can find by itself so it make sense to play more moves in
0 seconds.

Uri



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