invented end of the 19th century by Ben R Foster
appears as an appropriate pendant to janus chess ...
more infos here - onto that here for a 9x9 variation ...
contains also infos on 4 Player Traditional Chess and, The Emperor Game ... ~*~
(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)