Problem with the rating system!

I was rated 1532, and I was involved in a game with a player who refused to move. I clicked CLAIM WIN and to my shock, my rating dropped 40 points! How could I lose points for winning?

Originally posted by Thunderduck
I was rated 1532, and I was involved in a game with a player who refused to move. I clicked CLAIM WIN and to my shock, my rating dropped 40 points! How could I lose points for winning?