Duke of Rutland's Chess

This game was invented by John, third Duke of Rutland in 1747. The game is played on a checkered board with 10 rows and 14 columns. In addition to the normal pieces of a chess game, a player has two crowned rooks, a concubine, one additional knight, two additional bishops, and six additional pawns. The concubine has the combined moves of rook and knight while the crowned rook can move as a rook or can go one square diagonally.