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Game Courier Ratings. Calculates ratings for players from Game Courier logs. Experimental.[All Comments] [Add Comment or Rating]

Gary Gifford wrote on Tue, Jan 10, 2006 09:40 PM UTC:

In regard to the 'bell-curved scale of probabilities,' I think we should
be seeing the bell-curve as a distribution of the number of players
(y-axis) with respect to playing strength (x-axis).  Thus giving us the
bell.  But perhaps we are refering to 2 different curves here.  In regard
to probability, I read that a 200 point rating difference implies that the
higher rated player should be winning 3 out of 4 games between the 2. I can
look up the source later.

I again mention the following website as it offers a relatively simple
method of rating calculation. I still believe that it may be of great
value in the CV Ratings project.  The site includes example calculations.

http://www.chess-express.com/explain.htm