Diagonal Chess David Howe invented in 1997 a diagonal chess variant. Diagonal chess can be played with a normal set of chess pieces and board. Below, you read the description of David Howe of his game. The board is set up as pictured below. Players should sit at opposing corners of the board, so that the board is situated diagonally between them.
Forward movement is diagonal.
The rules of normal chess apply unless otherwise noted. Pawns do not have an initial two square move. Castling is not allowed. A white pawn that reaches c8, e8, h5 or h3 may promote to a Bishop or Knight. A white pawn that reaches d8 or h4 may only promote to a Knight.