Cylindrical chess differs from traditional chess in that it is played as if the left and right sides of the board were wrapped around to form a cylinder, which means pieces can go through one side and come out on the other.
The only rule changes are that there is no castling and no en passant. The program only allows legal moves. No warnings are given when a king is in check.
A small orange dot appear on a selected piece. Experiment to see how the pieces move before playing a game.