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)
In my mind, ice age precedence is logical, given that "mate" is a shortcut to taking the king. If, at the end of move 20n an Ice Age occurs and means that white can no longer take the king, then the game would continue.