Author: Jaime Benito de Valle Ruiz
Date: 15:04:29 04/15/03
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My program does exactly what the others do, but it seems that the Null Move
makes no sense in this extreme situation, since allowing black to move twice, or
even 5 times in a row while white does not move, won't improve its situation
(white can draw at any time), so probably all options are being prunned as
futile, and the mate line is not searched.
I deactivated the Null-move in my program, and the mate was found in no time.
Probably Yace, Schredder and King use the Null Move more sparingly or
selectively than other engines.
Regards,
Jaime
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