Author: Robert Hyatt
Date: 15:01:06 08/21/02
Go up one level in this thread
On August 21, 2002 at 16:28:10, Gian-Carlo Pascutto wrote: >On August 21, 2002 at 14:03:57, Robert Hyatt wrote: > >>On August 21, 2002 at 08:20:07, Vincent Diepeveen wrote: >> >>>On August 21, 2002 at 07:58:52, Vincent Diepeveen wrote: >>> >>>needed to get more crafty versions? >>> >>>That all ain't octobre 1997... >> >>What is your point? razoring is _not_ "forward pruning". It >>produces a somewhat similar result. > >You have a twisted definition of forward pruning then. > >-- >GCP 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...
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