For the last few days after clicking on "Live Chess" and "Play now", all I get is a screen in a new tab with nothing going on except for a message of "Loading..." near the top, right of center.  The URL ends with v=nnnnnnnn where some number has been created.

Which browser and version are you using?

When I clicked on the "Help" and "About" menu items to discover which version of Firefox I was on (8.0), I discovered the latest version is 9.1.  After upgrading it, I found an add-on ("Traffic Light") was incompatible and would be disabled.

At any rate, I'm up now.