Author: Gian-Carlo Pascutto
Date: 13:09:57 07/15/02
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On July 15, 2002 at 16:00:52, Dann Corbit wrote: >On July 15, 2002 at 13:30:54, Gian-Carlo Pascutto wrote: > >>On July 15, 2002 at 13:11:09, Christophe Theron wrote: >> >>>Why does double null move prove that null move is a correct search method???? >>> >>>Doing two null moves in a row means going back to standard search (a search not >>>involving an illegal move like null move is). >>> >>>I fail to see how it legitimates null move. >> >>I think the idea is simply to show that you can nullmove and still >>have a correct search. (but only with double nullmove, not single) > >Here is how to use double null move: > >Use your regular null move every place you are using it now (unless you use it >with in check or when zugzwang). Have a foolproof method for identiefying zugzwang? >When something occurs where you would normally abandon null move, switch to >double null move instead. > >In other words, we will never give it up completely, but (instead) switch to >double null move when things get dicey. > >For sure, it is much better than abandoning it altogether, unless you know for >sure it should not be used at all in some particular situation. > >E.g.: >Pieces get thin (pass below some threshold in points) --> instead of turning >null move off, switch to double null move. I do something similar, except that I use a verification search instead of double-nullmove, and I never use it in pawn endings. -- GCP
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