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. .
dmk: That is correct. Once you at the top (or even on the bottom), you do not have to challenge anyone - so in a way, you can protect your spot until someone climbs up to you to challenge you.
(sakla) If you want to find an opponent with similar playing skills to your own look in the Ratings page of the type of game you want and find a player with a similar BKR. (pauloaguia) (Bütün ipuçlarını göster)