Computer Chess Club Archives




Subject: DeepBlue && SingularExtensions && !Nullmoving

Author: Vladimir Medvedev

Date: 00:47:01 10/16/02

In his online interview Mr. CrazyBird told that DB did not use nullmoving
because it is not compatible with singular extensions. Could somebody explain
what are "singular" extensions (which difference with general meaning of
extensions technique? Are singular extensions used only for one move in the
node, while "common" - for all moves from the node? )

Why are they incompatible with nullmoving?

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