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Subject: Re: Pondering while still in book.

Author: Dann Corbit

Date: 01:18:03 02/23/05

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On February 23, 2005 at 03:07:35, Uri Blass wrote:

>On February 23, 2005 at 00:51:25, Matthew Hull wrote:
>
>>I've noticed that GNUChess ponders from the very first move of the game, even
>>though it is still in book.  Is this a usual practice?
>>
>>Does this give some advantage to the search when the game drops out of book,
>>since the hash table may have some relevant entries?
>
>I do not do it in Movei.
>
>Movei is too weak to even consider to implement such stuff that maybe gives 1
>rating point.
>
>I think that it is significant work to check for no bugs in such code and in the
>same time of working on the code I can get more rating points from implementing
>different stuff.

The point of first exit from the book is very important.  Many programs give a
double time increment on book exit.  This is a very clever strategy by GnuChess
and I think it may be more valuable than you imagine.

Of course, you can only do it in ponder mode.



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