Gordon Shumway: Cylinder Line4 is on another site, and it is pretty fun - would be a nice addition here also.
Sphere Spider Line 4 would be strange - since you can place a piece on a wall - but in reality the wall is not there... so would it play just like Cylinder Line4 - or would you be able to place a piece in mid air (next to a edge of the board which is not really there.)
(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)