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  RD stands for ratings deviation.  RD is a statistical measure of how stable
your rating is.  For the most part, RD goes down when you play a lot of games
and goes up if you play infrequently.  RD is used in the formula that adjusts
your rating after a chess match; lower RD values mean that your rating will
not change as much.  RD values are listed in finger displays of ratings, in
match challenges and in assess information.  For further details about RD and
how it is used in ratings, read "help glicko".

  NOTE: The size of RD is not in any way a measure of your chess ability.  It
is not a rating.

See also:  assess  finger  glicko  ratings

[Last modified: May 14, 1997 -- Friar]

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Last modified: Sun Feb 11 14:27:58 GMT Standard Time 2007