- invitations to games (you can also use the New Game menu)
- information about upcoming tournaments
- discussion of games (please limit this to completed games or discussion on how a game has arrived at a certain position ... speculation on who has an advantage or the benefits of potential moves is not permitted)
- links to interesting related sites (non-promotional)
I think it would also be necessary (if we give black an extra move when capturing a piece) to ban him/her from moving the pawn which made the capture as the extra move. Also, black should be allowed to refrain from making the extra move if he/she finds it advantageous not to.