Although BrainKing had been formerly created as a pure game site, it also contains many features known from social networking projects - discussion boards, chat rooms, friend lists, user profiles, user pictures etc. Many of these functions are available to all registered users, but there are still some extras to be unlocked after upgrading to a higher membership level:
(hide) If you want to play a game with an opponent of a similar level, you can define a required BKR range for a new game invitation. Then nobody with a BKR outside this range will be able to see/accept it. (Katechka) (show all tips)