ScarletRose: Good ones. I could not think of anything good, but wanted to at least put one out to see how it works, so I choose one of yours! (plus added 1 other answer in case they don't want to answer)
(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)