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Subject: Re: Progamming; Null Moves

Author: Bas Hamstra

Date: 01:15:21 12/28/99

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On December 27, 1999 at 10:24:30, Robert Hyatt wrote:

>On December 27, 1999 at 05:14:47, Edward Heddle wrote:
>
>>I'm new here. I am not actually involved in programming, but more the theory of
>>programming.
>>
>>My question is; how do null move reductions work; i.e, at what points in the
>>search tree are null moves tried?
>>
>>Thanks
>>
>>Ed ;)
>
>
>Everywhere.  Any position where you can let your opponent move twice in a
>row, and you still fail high, is obviously a very good position for you (or
>a very bad one for him.)

Still it is strange that this worked bad at shallow depths. That same kind of
errors must still be in the nullmove tree. If

I am still not entirely convinced that with nullmove is always better. If I let
my engine play GNU for example with R=2 and with nullmove off, it doesn't seem
to make a big difference at blitz.









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