Go to your home page, click online chess, then settings, and towards the bottom is a 3 line "notifications preference" area. That should do it.
OOPS: My bad, it's called "game alert notification" or was it "game alert preferences". Apparently my short term memory is shot .
I'm getting notifications of every kind! but nothing to tell me when the other guy has moved. Do I have to turn that on somewhere?
Thanks - rev