Author: Robert Hyatt
Date: 21:37:32 07/14/03
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On July 14, 2003 at 18:38:51, Uri Blass wrote: >On July 14, 2003 at 16:35:05, Robert Hyatt wrote: > >>On July 14, 2003 at 16:32:17, Robert Hyatt wrote: >> >> >>One thing more I should add. Cray Blitz searched about 20K on a single YMP >>CPU. On the genius PC (486/33) it could not hit 100 nodes per second. For >>a speed reference. > >I think that comparing the same program is misleading. >I guess that a programmer who needs to write the same algorithm for 486/33 is >going to write it in a different way. I think some of the things are simply _not_ going to be done. Too slow. > >I compare between Crafty and cray blitz because based on my knowledge crafty has >also some knowledge that cray blitz had not. Yes. Some endgame stuff for sure. But then it is missing some king safety stuff. Unfortunately, king safety is important earlier than endgame knowledge, since the middlegame comes first. :) > >Better algorithm(null move pruning). Cray Blitz did null-move. Just not the R=2/R=3 stuff. >In part of the cases better evaluation based on more experience. > >Based on my memory of previous posts some months or some years ago you admitted >that it was not clear if Crafty is better or worse than Cray blitz with the same >number of nodes so I guessed that assuming that they are equal is not a big >mistake(even if I am wrong by 100 elo then it is still clearly less than 600 elo >ssdf rating difference). > >Uri Hard to answer. However, Cray Blitz on the T90 stomped Crafty badly on my quad 700. Of course CB was faster by a factor of 5.
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