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Game Courier Ratings. Calculates ratings for players from Game Courier logs. Experimental.[All Comments] [Add Comment or Rating]
🕸📝Fergus Duniho wrote on Tue, Jan 10, 2006 06:21 PM EST:
I'm sure we are referring to two different bell curves. The Elo method
specifically tries to measure probabilities, and the probabilities fall
along a bell curve. The following page lists the probabilities associated
with various differences of Elo points:

http://www.ascotti.org/programming/chess/elo.htm

The two axes are (1) the difference between two Elo ratings and (2) the
probability that one player will defeat the other in a game.

In contrast, the GCR method correlates (1) the difference between GCR
ratings with (2) an expected total score on the games played between two
players. This relation is linear.