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Subject: Re: Ply 'n+1' searches lesser nodes than 'n'

Author: Robert Hyatt

Date: 10:13:22 10/28/02

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On October 28, 2002 at 01:17:41, Nagendra Singh Tomar wrote:

>What all reasons can you think of for a ply 'n+1' searching lesser nodes than
>ply 'n' search.
>
>regds
>tomar


It should be very rare.  But I see no reason why it can't.  One example...

at ply=n, the first move has a score of +1.0 and the other moves are all very
complicated and lead to scores just under +1.0.

At ply=n+1, the first move has a score of mate-in-10, which will cause the
other moves to be searched very quickly since they will all be way under
the alpha value.

But again, this should not happen often.  If it happens too frequently, it
suggests
that something bad is going wrong with move ordering.



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