The board is a 6x6 board, extended in two sides by a unified 2x1 cell each. These two cells are linked by a big cell called X , such that pieces may cycle from one side of the board to another. There is no castling.
Pawns promote only to queen, rook, or bishop.
There are no knights in this game. Pawns must be promoted before they can ever make use of these special cells. To come out from cell 0 back to the board, they may either assume moving from c0 or d0 . They may not make a capture. To come out from cell 7 back to the board, they may either assume moving from c7 or d7 .