About the ratings
These ratings correspond more or less to Elo ratings,
used commonly in chess and many other games.
They are calculated using a variation of the Glicko rating system,
and updated after every rated game.
RD = Ratings deviation. This measures how reliable the rating is. Lower value means more accurate rating.
The ratings shown in the table are conservative estimates, lowest values of 95% confidence interval.
(Practically this means that if your RD is much more than 50, your correct rating is probably higher than shown
here, and you should play more games so the system can get a better estimate.)