For posting:
- 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)
Theoretically - a lot, but that's just like saying you need 9 queens in regular chess to account for all the possible conversions. In practice it's rare to see more than 4 knights bishops or rooks of one colour, but say you need 8 of each, so you can sell more pieces :)
(hide) If you are waiting for your turn, click on "change" next to the "refresh" on the main page, then set refresh the page to 30 seconds to get your turn to move displayed faster. (Servant) (show all tips)