Author: Uri Blass
Date: 14:21:15 11/20/03
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On November 20, 2003 at 17:09:12, Russell Reagan wrote: >On November 20, 2003 at 16:47:03, Uri Blass wrote: > >>The gap between Crafty and Shredder7.04 is 197 elo and even the optimistic >>prediction of 70 elo per doubling the speed do not give it 197 elo. > >Some people think 70 ELO is low for a 2x speedup. > >http://citeseer.nj.nec.com/ciancarini94comparison.html > >"For instance, some experiments found that improving 5 times the running time of >such an algorithm the playing strength of a chess programs improves about 200 >Elo points." > >Their reference for that is: > >K.Thompson, "Computer Chess Strength", Advances in Computer Chess 3, M.R.B. >Clarke (Ed.), Pergamon Press, (1982), 55-56. > >That would mean a 2x speedup was worth 80 ELO. It may be only for blitz. In the ssdf you can see clearly that 70 elo is too high based on comparison between rating of programs on A1200 with rating with the same program on K6-450. Uri
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