Author: Mike Byrne
Date: 10:17:53 10/17/04
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On October 17, 2004 at 12:05:22, Roy Brunjes wrote: >With so many experts here on computer chess in general, I'm wondering where this >group pegs Crafty's playing strength. I'm confident it is below the top >commercial programs, but by how much? My unofficial guess is 100 rating points >weaker, perhaps a bit more. That would put it somewhere in the 2650 - 2700 >range (if using SSDF "ratings" as the standard for better or worse). > >What do others think? For the sake of comparison, I'll have to assume the same >CPU that the SSDF rates the programs using (Athlon 1200 MHz). > >Roy The SSDF computer vs computer evidence for Crafty 18.12 points to a rating of 130 to 200 points below the top 3 or 4 engines in computer vs computer play. It is my belief that against human play, the rating difference will less pronounced. I say this for several reasons. I believe that most commercial programs gear their programs against other programs - to get high SSDF ratings and sell more copies. Bob Hyatt does not sell Crafty - obtaining high SSDF ratings is not a high priority -- no custom book for SSDF etc. Many of Crafty test games are against humans. Bob has always spent most of his time tuning his programs against humans - thus I believe it would do almost as well as Shredder/Tiger etc against strictly human competition as the other top programs. His Crafty clone , "scrappy" who plays 100% humans I believe proves that point more or less - it has always been one the top rated on programs on ICC (although since I gave up my membership, I have not checked recently). I also believe that the strictly computer vs computer testing exaggerates differences between programs - I call this the "Claude Bloodgood" effect. Claude Bloodgood was a convicted murderer (he murder his mother using an axe ) and served the remaining years of his life in the Virginia penitentiary. He was also perhaps one of the strongest chess masters ever to serve a lengthy prison sentence. While incarcerated and playing a limited pool of other incarcerated chess players, Claude Bloodgood became the second highest rated player in the USCF rating list. Since his death and through the internet, the axe-murderer has become world famous -- here's a picture of Claude on a Hong Kong Website http://hk.geocities.com/goodchessclub/peo-bloodgood.html -- yes he was really that scary looking ....he actually got to write several books while in prison - they are geared more towards the chess hustler type. http://www.chesshouse.com/shopexd.asp?id=1887 http://www.chesshouse.com/shopexd.asp?id=1886
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