The game of chess pits two players on either side of a board or apron called chessboard composed of sixty-four light and dark squares named the white squares and the black squares. The players take turns moving one of their sixteen pieces (or two pieces in case of castling), clear for the camp of the whites, dark for the camp of the blacks. Each player has at the start a king, a lady, two towers, two madmen, two riders and eight pawns. The goal of the game is to inflict a dull check on the opponent, a situation in which the king of a player is engaged without being able to remedy it.