From: "Daniel M. Toebbens" <toebbens <at> HMI <dot> DE>
Date: 30 may 2003
Subject: Re: Dual ratings

On Wed, 28 May 2003, Larry Kaufman wrote:

>      The following is a listing of all ratings of players rated on both the Pan-Atlantic and ShogiClub24 rating systems fulfilling the criteria given below.  Of course, only those players whose identities on ShogiClub24 are known to me could be included.  The first column is Pan-Atlantic, second is ShogiClub24.
>
>       PAN   Dojo
>       2422  2284
>       2285  1993
>       2255  2013
>       2195  1753
>       2174  1925
>       2118  1455
>       2101  1465
>       2094  1555
>       2074  1064
>       2044  1181
>       2012  1453
>       1980  1513
>       1926  1378
>       1924  1124
>       1908  1161
>       1852  1377
>       1809  1298
>       1784   993
>       1769  1149
>
> All players listed have at least 80 games on ShogiDojo, which reduces the
> effect of starting rating to under 5%.  All players listed have at least
> 30 games on Pan-Atlantic, where starting rating plays only a tiny role and
> is in any case based on known rank.  Player must be listed on 2002 or
> 2003 Pan-Atlantic rating list.  No names are given in case some players
> prefer anonymity.

Well, it seems like all people Larry knows about are dan-players. :-)
That of course makes any curve fitted to these data highly unreliable if
applied to the kyu-range. So, since I have a reliable rating in both
lists, I'll add them to the pile:

Pan-Atlantic: 1138,  Shogi Dojo: 336
(BTW, my handle at the dojo is also Toebbens.)

The difference here, while still very large, is of course lower then
calculated from fits derived from the previous data alone. According
to those my rating at the dojo should be negative. However, my dojo rating
at the moment is pretty stable, while my offical rating keeps rising (and
I'm pretty happy about that. :-) So, the difference might actually reach
the predicted 1000-and-something points.


Daniel Toebbens