The knight's tour is a puzzle which dates back to the 9th century, where the object is to move a knight to every square on the chessboard exactly once.
There are two types of tour, open and closed. In a closed tour the knight returns to it's original starting point. In an open tour it does not. In this version, you will earn more points for a closed tour than an open tour.
Squares will be dimmed after you visit them. To facilitate a closed tour, the first square you visit will be dimmed with a cross.
If you are unfamiliar with the rules of chess, you may press the 'Show Legal Moves' button to show all of your legal moves. There is no penalty for pressing this button.
If you wish to take back a move at any time, you may press the 'Take Back Move' button. The only penalty for pressing this button is the timer will continue to run.
This is probably more correctly a puzzle than a game.