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Subject: NULL move, general principle -- possible alternative

Author: Dann Corbit

Date: 16:54:01 09/29/99


For NULL move, we have two kinds of situations:

0.  A move is so bad I wish I did not have to make it because I would rather
skip a turn.

1.  An opponent's move is so bad they would not want to make it because they
would rather skip a turn.

In the first case, it seems we do not need to consider this move unless there
are no alternatives.

In the second case, similarly unless the *opponent* has no alternatives.

What I am wondering is "why is the loss of a tempo the magic dividing line?"

It seems the dividing line could be put anywhere we want.  Has anyone
experimented with a floating [don't bother looking here] line that can be
redefined during run time?  I know this sounds a lot like ordinary alpha/beta
but what I mean is to change the threshold for null-move to something other than
the normal value.





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