I've been meaning to ask this awhile. I guess I missed the advent of it, but since I've recently returned to playing again I've noticed a "Leave Game" button near the top on the setup screen and have been curious about it. Before I left in the early summer there was some discussion about being able to decline playing an opponent if one so chose. I see that this took root in the programming.
What happens to one's ranking ELO points if he clicks on this button?