Computer Chess Club Archives




Subject: Nullmove: when to avoid it?

Author: Leen Ammeraal

Date: 02:56:36 02/28/01

I am not sure about when to avoid nullmoves.
I omit it:
a. when in check
b. when there are less than 5 pieces (including pawns) on the board
c. when the last move was a nullmove
d. at the root node
Should I also omit it in some other cases,
for example, when any hashmove (even with a low draft) was found,
or when beta = alpha + 1?
Thanks in advance for any help.

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