Chess is an ancient game of strategy. Each player begins with 16 pieces on the chessboard with the goal of cornering his opponent’s king. It has taken different forms over the years. One form is human chess, which was introduced around ad 735 by Charles Martel, duke of Austrasia. Martel would play the game on giant boards with real people as the pieces. The human pieces were costumed to reflect their status on the board and moved at the whim of the players—manipulating them to their own ends.