Access to Playchess.com
Playing chess on the Playchess server requires that you are connected to the Internet, which means you must start your network or dialup connection. If you are not online, the program uses your default Windows dialup connection to try to establish contact.
If you use ChessBase 13 then click the Button "PlayChess.com" in the Database window.
You will get the login screen, which allows you to set up an account for yourself. You can also enter as a “guest” if you want to look around a bit first. But, you will have fewer rights on the server. After a while you should definitely set up an account which you can use regularly.