This is the version of my Besiege Chess, played on a torus shaped board. The lower and upper edges (painted in red) are glued together; so are the left and right edges (painted in blue). So if you come to one edge with, say, your bishop, you can continue your path in the other edge.
 
All of the pieces play as their counterparts in usual chess except a small difference for the pawns. Here, since the board is rotated 90 degrees pawn movement changed respectively. So, the inner pawns move inwards, outer pawns move outwards, all pawns capture diagonally in the direction of their movement, can promote when they arrive to the column that the opponent pieces start the game. A Pawn captures by moving one square leftwards (or rightwards) and diagonally. If a Pawn reaches the far column that the opponent's pieces start from, it promotes, changing into a Knight, Bishop, Rook, Queen or a General.
 
The additional piece, General, can move as a queen or a knight.
 
Since there is practically no edges at the board, it is really hard to checkmate the opponent king. Don't forget the bishops, queens and the generals have unusual covering of the board squares.