In addition to playing in the chessmaster UI the manual says you can also play correspondence chess via web browser if you have a Ubi account. It says to go to chessmaster.com. When i go there I dont see anywher to play CC. The rankings and that dont accept my ubi username and password and I just get SQL errors. Anyone successfully play CC using a web browser? Thanks Ken

It is/was possible through http://cmxi.ubi.com/ not chessmaster.com. But the site is down for quite some time now.

Yes, Correspondence Chess isn't working due to the server problems (some sort of MySQL error), which have persisted for at least the past two months.

I've brought this to the attention of Ubisoft Technical support numerous times... they've assured me they're looking into it, but that a fix might be delayed due to the E3 conference currently going on.

Good news! I just logged in to this site and it appears to be up and running...

Yes, it's been up and running for over a month... there was another thread about this as well; I replied to it when came back up.