What is Knight's Tour?

A Knight's Tour is a sequence in the game of chess. It involves a player moving a knight piece to every square on the chessboard exactly once. This sequence can be either 'open', where the knight may start and end at any square, or 'closed', where the knight ends on the same square it began, allowing for the sequence to be repeated. The Knight's Tour is often used as a problem in combinatorics and computer programming.