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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6) You cannot play the same person if you are already playing a game with him/her in the same Stairs or if you finished a game with him/her in the same Stairs within recent 14 days.
(hide) If you need to find an older message from the selected user, click on his Profile and use the "show this user messages" link at the page top. (konec) (show all tips)