Author: Ernst A. Heinz
Date: 12:08:45 09/26/00
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Hi Vincent, >So a combination of 3 and 2 ply on a depthleft basis , as opposed to my >current rude way of always using R=3, and also when compared to the >original idea from me some years or 5 ago to >do the first nullmove with R=3 and the second with R=2, >is a quite clever way to apply nullmove in the search, as using depthleft >to decide on which Reduction factor you use means that it's not hurting >your hashtables with wrong scores also. If you mix R=2 and R=3 using the >number of nullmoves done as a basis, then this means that you might get >cutoffs in positions where score is based upon R=3, which get returned >in a position where you apply R=3 for the first time, practically doing R=3 >as worst case. > >I think i directly start experimenting with adaptive nullmove again :) My sincere congratulations, you finally understood what adaptive null-move pruning is all about! =Ernst=
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