Author: Dann Corbit
Date: 12:29:41 05/04/01
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On May 04, 2001 at 15:25:39, Will Singleton wrote: >On May 04, 2001 at 14:27:54, Dann Corbit wrote: > >>Christian Söderström >>Gian-Carlo Pascutto >>Ulrich Tuerke >>Robert Hyatt >> >>And even David Rasmussen, because his number was of value, even if his >>explanation was a bit lacking. >>;-) >> >>It seems that move ordering is something of a black art. >> >>Everyone does it a little differently. >>Everyone even *counts* it a little differently (so we have to think clearly to >>see if we are comparing apples to oranges). >> >>And yet, it is one of the most important facets of the search. The performance >>jump in going from 70% correct to 90% correct will be enormous. >> >>I also went through the information in Ernst Heinz's excellent book, and >>Pepito's code. > > >I was interested in the subject, and was going to run it. But I have to admit >that I couldn't quite get what you were asking, so I blew it off. > >I've worked quite a lot on move ordering, and would be interested in any >conclusions you might have. The conclusions are fairly simple: 1. It is incredibly important to get it 'close' to right. If you don't average 90%, you are taking a punch in the chops. 2. Different methods seem to all work just as well. 3. Try them all, including hybrids, and use whatever works best.
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