Author: Peter Fendrich
Date: 17:10:11 08/13/99
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On August 13, 1999 at 18:56:09, José de Jesús García Ruvalcaba wrote: >On August 13, 1999 at 16:45:56, Peter Fendrich wrote: > >>On August 13, 1999 at 16:20:13, vitor wrote: >> >>>hi, >>>i know how nullmove pruning works, but could someone please explain how >>>recursive nullmove works? is it just doing lots of consecutive nullmoves? >>>thanks >> >>It means that you allow several nullmoves within the same path in the search as >>opposed to ensuring that no more Nullmoves will be done below this one. >> >>Not consecutive, however. It is no good idea to answear a Nullmove with another >>one. That will be two "pass" after each other and nothing happens. So no >>Nullmoves in the ply directly following a Nullmove, but in the next ply further >>down it's ok again. >> >>//Peter > > Some people allow two (but not three) consecutive null-moves, in the hope of >catching some zugzwangs this way. >José. True, but it's a costly trick, IMO. One idea, I got right now, is to restrict it in some way and only use it when zugswang is likely. Maybe possible? I don't know and have never tried it. //Peter
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