One of various sidelights to the game of chess is the problem known as a Knight's Tour (or Knight's Spring), the problem of having the knight make a complete circuit of the standard 8 x 8 chessboard, alighting once and only once on each of the 64 squares.
Borgmann, Dmitri A.
Word Ways: Vol. 7
, Article 13.
Available at: http://digitalcommons.butler.edu/wordways/vol7/iss2/13