Author: Robert Hyatt
Date: 06:18:39 01/24/00
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On January 24, 2000 at 02:25:19, Howard Exner wrote: >On January 23, 2000 at 22:41:21, Robert Hyatt wrote: > >>Check out the players. USCF (at the top) is typically no more than 50 points >>above FIDE. Ken Sloan has a detailed list on his web page in the department >>here... and he did a lot of analysis to correlate FIDE to USCF. the +100 or >>more is generally wrong. > >Grab a Chess Life issue that has the USCF ratings and slap the results of those >players 2500+ USCF into a database >along with their Fide ratings. There should not be an overwhelming number of >such players. It would be interesting to compare the difference between the >2500+ group with the 2300 - 2500 group. That though would be a little mork work. This is what Ken Sloan did. He took the FIDE database, the USCF database, and found the common players. He then "fit" a conversion formula to this data, and found that +100 was way too big. He even made it more fine-grained by doing this "class by class". (IE on the USCF 200-point breakpoints). I never remembered the exact data because I didn't consider it interesting. I do recall his asking me in the hall about what I thought the correction factor should be, and when I responded with the usual +100, he said _wrong_. And showed me his results... Bob
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