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Subject: Nullmove: when to avoid it? Why not when depth=1?

Author: Severi Salminen

Date: 10:56:21 03/02/01

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>>>I can save bunches of nodes by not nullmoving on the last ply before
>>>qsearch. So if depthleft == 1 ply then not nullmoving reduces
>>>for me the number of nodes considerably.
>>Interesting idea, I'll give it a try in my engine.
>Try it severi!
>I have observed the same thing. I don't do nullmove
>unless depth > 1. I think it makes sense.

Why does it make sense? I have not yet tried it but I don't understand why
should it be better? Do you have any opinions? I allways want to understand the
features I put into my engine and I don't get this one...


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