All white's major non-royal pieces are rooks, while all black's major non-royal pieces are archbishops: pieces that can move like a knight or like a bishop.
Pawns promote to archbishop or rook.
Except for the different setup, all rules are as in chess.
No castling. Pawns promote to cardinal or marshall.
macqkbnr pppppppp ........ ........ ........ ........ PPPPPPPP MACQKBNRM: Marshall (moves like rook or knight).
A: Amazon (moves like queen or knight).
C: Cardinal (moves like bishop or knight).
Q, K, B, N, R, P as in orthodox chess.
Castling is possible, with marshall or with rook. Pawns can promote to marshall, amazon, cardinal, queen, bishop, knight or rook.