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Subject: Re: Null-move R=? question

Author: Gian-Carlo Pascutto

Date: 22:20:45 09/28/99

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On September 28, 1999 at 15:43:43, Robert Hyatt wrote:

>On September 28, 1999 at 13:42:00, Gian-Carlo Pascutto wrote:
>
>>
>>Also, does the actual depth the program reaches play part in
>>this consideration ? (e.g. if you only get 5 ply then R=2 or
>>R=3 are out of the question?)
>>
>
>they are _very_ dangerous at that depth.. because any null-move will
>take you right into the q-search, which is pretty simple-minded.  It works
>far better at deeper depths...

Ok so what about deciding the R factor by looking up how many plies
there are still below the null-move search ? i.e. trying to ensure
there is always a non-null move search in the null-move search (ahem)
This seems workable as it always catches at least the simple one-move
threats.

Is something like R=1 doable for 4-5 ply searches ? At what depth can
one consider taking it to R=2 ?

--
GCP




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