Author: J. C. Boco
Date: 09:02:27 06/19/03
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On June 19, 2003 at 09:15:10, Uri Blass wrote: >On June 19, 2003 at 08:23:20, Steve Maughan wrote: > >>Uri, >> >>>>It can't be - it simply does not have the horsepower - the best engine in the >>>>world (pick your favorite) would not be over 2300 with the processor above. >> >> >>>palmtiger14.9 is above 2100 ssdf rating and based on what I read I understood >>>that it is probably equivalent to 2200 fide rating or to 2300 USCF rating. >>> >>>palmtiger14.9 used very small hash tables and the problem was a design >>>decision and not hardware so palmtiger15 may be 50 elo better on the same >>>hardware. >> >>So you agree with Mike that 2300 USCF is probably the most optimistic? Or do you >>really think it is 2500 USCF? >> >>Steve > >Based on peter berger post I think that it may be more than 2300 USCF. > >Uri There is anecdotal belief that the old radio shack Chess Champion 2150L is rated right about 1850 USCF at a time control of 40 moves in 2 hours. Many years ago this computer was on the SSDF list (and now it isn't, I don't know why) at a SSDF rating of 1932 (give or take a handful of points). This would imply that you would actually need to remove about 100 points from the SSDF ratings to obtain the USCF ratings. At one point the SSDF removed 100 points from all the ratings. I do not know when this happened, but since the Chess Champion 2150L computer is an older one, perhaps it underwent this change also. In that case its SSDF rating would be 1832 after removing the 100 points. In this case it would imply that the SSDF rating is very close to the USCF rating today. This is in stark contrast with the old knowledge that USCF=SSDF+180, an equation I remember when the Computer Chess REports came out in magazine form. Could someone who knows the history better than I comment on this? Can you post the generally accepted equation for converting SSDF to USCF?
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