Author: Ernst A. Heinz
Date: 09:28:41 04/07/00
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>>> 3) does "razoring" mean pruning in general (or even alfa-beta method)? >> >>No, razoring is when you do futility pruning at the last ply of your full-width >>search. I think most people don't like it. I tried it and all my test suite >>scores went way down, even when the futility threshold was pretty conservative. >>It just causes to the search to miss too much... > >I thought that was called "extended futility pruning" and razoring was >simply reducing the depth of the search by 1 ply if nothing interesting >was going on near the leaf and the move made does not bring the score >near alpha. No, extended futility pruning is applied at pre-frontier nodes with a remaining search depth of 2 plies. Normal futility pruning, however, relates to frontier nodes with a remaining search depth of 1 ply. =Ernst=
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