Compared with early backgammon, the modern game has added the doubling cube and introduced further rule changes. The tables board now has a 'bar' and pieces are moved to the bar when hit instead of just being off the table. Winning double is now called a gammon and is achieved if a player bears all pieces off the board before the opponent has borne any. The definition of backgammon has changed and is now scored if a player bears all pieces off the board while the opponent still has pieces on the 'bar' or in the player's home table.
