The winning strategy, by the way, was the subject of the mathematical paper written by John Nash which was the subject of the movie A Beautiful Mind with Russel Crowe playing Nash.
(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)