Chess, online! Play and chat while watching others play. One game per server.
There are a few things missing, for instance special moves such as "Taking En-Passant" and "Castling." If you don't know what those are, then don't worry =P
Check Mate must be handled via the admit defeat button. And there is no way for it to check for stalemate as well. But, that can be handled via simple deduction on the players behalf.