Hnefatafl. One of the rare breed of games with two unequal sides. The defending side comprises twelve soldiers and a king, who start the game in a cross formation in the center of the board. Their objective is for the king to escape by reaching any of the four corner squares. The attackers comprise 24 soldiers positioned in four groups of 6 around the perimeter of the board. Pieces move like a chess rook. Derivatives include Breakthru, Break Away, Swords & Shields and Thud.