Author: Gian-Carlo Pascutto
Date: 02:26:45 08/22/02
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On August 21, 2002 at 18:01:06, Robert Hyatt wrote: >No I don't. I have a _classic_ definition of forward pruning: > >To selectively discard some moves while keeping others. > >Razoring doesn't do that. It simply reduces the tree depth by 1 ply for >some branches. Just like null-move. Neither of which are selective forward >pruning in any book you might check... > >The effect is admittedly somewhat similar in that the size of the tree is >different. But with forward pruning you throw moves out based on some >a priori knowledge and once you throw them out, they are _out_. Reducing >the depth is _not_ the same thing, because you _still_ give the move a chance >to do something... Reducing the depth is throwing out moves at the bottom end, not the top end. It's exactly the same thing, it just works at the other end of the tree. -- GCP
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