Justaminute: It should. The iPad uses the Safari web browser by default, which works fine for BrainKing (as for almost any site without Flash). I don't know if it's a special version, like on the iPhone (?), but BrainKing has not been a problem for me to use on any mobile device that had the capacity to run a modern full featured browser. I even use it on my phone with Opera Mobile. Seeing how big the iPad's screen is, using BrainKing on it should be very enjoyable :)
(kaŝi) Se vi volas ludi kontraŭ ludanto de simila nivelo, vi povas difini intervalon de BKR ĉe invito al nova ludo. Tiukaze neniu kun BKR ekster tiu intervalo povos vidi/akcepti ĝin, (Katechka) (Montri ĉiujn konsilojn)