To find out what stairs you can currently challenge someone in, first go to the Main Stairs Page, then click on "Show your stairs only" link. The ones in BOLD are ones you can make a challenge in.
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Requests:
1) show the stairs in the game lists in the "event" column
2) show all ongoing games in the stairs page
Question:
what happens with the games when a player leaves the stairs? (the help page clarifies that qu only for retirement)
(hide) If you only look at some of the discussion boards on a regular basis you can add them to your favourite boards list by going to the Board page and clicking "Add to my favourite boards". (pauloaguia) (show all tips)