Fencer: I think that you (as site creator) must to separate handicap and normal games (and may be rating - not rating, visible - hidden too) in view of main page. It can be by means of the insert of new columns. What is your opinion?
(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)