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Subject: Re: ELO VS. USCF RATINGS

Author: Vincent Diepeveen

Date: 16:16:36 05/10/98

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On May 08, 1998 at 22:34:59, Robert Hyatt wrote:

>On May 08, 1998 at 13:41:51, Fernando Villegas wrote:
>
>>On May 08, 1998 at 10:28:53, Terry Presgrove wrote:
>>
>>> Would someone please explain the  aproximate rating
>>> differential between ELO and USCF ?
>>
>>Hi:
>>It seems the differential does nor run along an straight line, but on a
>>curve. At the high end of it both lines -or curves-tend to aproximate,
>>so some learned people say. In the middle class rating section, it seem
>>the difference is like 100 points, that is, USCF rating is inflated in
>>100 points compared with the equeivalent in strnght of ELo rating list.
>>A 2400 player would be no more than a 2300 in Elo, but who knows...
>
>Ken Sloan posted a detailed analysis of this about a year ago in
>r.c.c.c,
>where he compared several hundred players with both FIDE and USCF
>ratings.
>
>For a linear fit, USCF=FIDE+50.
>
>But it is not a linear equation, unfortunately.  But that is a close
>approximation, particularly at 2300 and up...

Not really. I have between 24xx and 25xx myself
at ICC myself, and when i play blitz.

Americans with an  USCF rating they positionally play like a beginner,
to put it in an understatement, when i compare that rating to what
an european player moves with such a rating.

So usually i'm very happy to play an American! Weird that there are
so many IM's at ICC which play positionally like ****, where **** is
something which smells. And it's good to know that here in Netherlands
they describe my style as being effective but not too positional.

For players above 2500 rating usually becomes very accurate at ICC
server. Ratings below this are very inaccurate. And i believe that
the lower a rating gets, the bigger the difference x.
in USCF = FIDE + x

For example 2200 USCF players
i'd usually give 1800, and 2400 players more like 2200.








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