For as long as chessboards have existed, there have been puzzles involving chessboards and chess pieces. Some of the most enduring conundrums involve knights.
Example of a knight’s tour in which the rows and columns have the same sum (260), but the diagonals add up to 348 and 168.
According to the rules of chess, a knight makes an L-shaped move that shifts its position by a single square in one direction and two squares in a perpendicular direction.
Log in
Subscribers, enter your e-mail address for full access to the Science News archives and digital editions.