Since I have DSL here in Germany, I tried to play an online game. I won and my rating has now increased from starting 5000 to 5067. I may try to play some more later.
EDIT: I’ve played some more. First I won a game, which got me to 51xx (close to 5200). Then I lost about five games against some Japanese dude. He was high rated, so I dropped to 510x. Then I won a lengthy game against some player with a hearth in his name. This got me close to 5200 again. Meh!