ICC Help: assess
Assess shows you the rating changes that will occur if you win, lose or draw against another player. Just type "assess player-name". To see the rating changes between two other players, type "assess player1 player2". To see the rating changes in a game you are currently playing, just type "assess". Assess also lists the current rating of each player, in each of the rating categories.
For example, "assess Hawkeye Smallville" might give:
In this example, if Hawkeye beats Smallville in Bullet, his rating should go up 13 points. (Smallville has not played Bughouse, and neither of them have played Loser's, which is why the assessments in those categories are so high.)