Author: Mike Byrne
Date: 23:13:58 08/18/03
Go up one level in this thread
On August 18, 2003 at 16:36:26, Kerry McDermott wrote: >On August 18, 2003 at 16:08:38, Terry McCracken wrote: > >>On August 18, 2003 at 14:56:54, Kerry McDermott wrote: >> >>>Why did SSDF adjust their ratings down by 100 pts. a few years ago? How do they >>>correlate to USCF ratings now? Were the ratings inflated to begin with? Does >>>that mean that my old Fidelity Excellence is now rated around 1850 USCF as >>>opposed to 1950 as it was before? (It actually seems lower than 1850 now >>>anyway.) >>> >>>Regards, >>> >>>Kerry >> >>Check the list, the Excellence is well below 1850 on their lists. >> >>The Mach III Master is only 1893 on thier lists and it's much stronger than >>the excellence. >> >>If you want an USCF rating, add 200 pts., if it's below 2000 ELO. >> >>Terry > > >Terry, > >The rule of thumb for CCR back in late 80's and early 90's was to add 200 pts. >to SSDF to get USCF. If SSDF has reduced their list down by 100 pts. (as they >did in year 2000 sometime) then should we not add 300 pts. to continue to be on >par with USCF? Or is the add 200 pts. still a valid rule of thumb? If so, why >the reduction by 100 rating points by SSDF? What changed? Did SSDF decide from >experience that the ratings were inflated by about 100 pts. as compared to ELO >or Swedish ratings for human chess players? > >Kerry > >p.s. Before year 2000, the SSDF rating for Excellence was 1757 and after year >2000 it is SSDF rated 1657. There has been a lot of tinkering with ratings over the last 15 years. USCF systematicaly lower most of the well established players OTB players (who were no longer improving but still had not hit their decline period that comes with age) ratings by about about 150 points. Personally, I think SSDF on the low end computers is about aligned with USCF. On the high end (2800) , they are too high. The problem of course is that they play nobody but computers - thus we see the "Bloodgood" effect. Bloodgood was a master level player who went to prison for murder. While in prision, playing nobody but other prisoners, he became the second highest rated player in the US. Search google for "Bloodgood chess prision" to read all about it.
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