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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Fencer: Great link Fencer ... never seen it before. Can I suggest a further line at the bottom which would be a total (yeah I know, get the calculator and add them up yourself, but I am a lazy sod :)
(hide) If you want to save on bandwidth you can reduce the amount of information that shows up in your pages in the Settings. Try changing the number of games in the main page and the number of messages per page. (pauloaguia) (show all tips)