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)
ughaibu: The obvious answer is that the same position with a different number of checks given beforehand is in fact not the same position, so the repetition rule should not apply. Good question though since it is unclear whether the written rules mean that, and whether the implementation matches that.