Chessence is a chess variant invented by Jim Winslow in 1989.[1][2] The board is a 6×9 rectangle of squares with eight squares missing (blackened out in the diagram). Each player has a king and nine men with initial setup as shown, including three men initially not yet in play at the side of the board. To win, a player must checkmate or stalemate the opponent.
- ^ Pritchard (1994), p. 54
- ^ Pritchard (2007), p. 296