I suggest allowing the player to pick the color that he wants. As can be done with the size of the board, it'd be nice to be able to chose the color for yourself. I know I wouldn't chose Fluorescent Orange, but someone alse might want it. :) And while we're on the subject, the color of the pieces, too!
(sakla) 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) (Bütün ipuçlarını göster)