Knight

Knight is a 1991 board puzzle by Michael A. Kelly that challenges the player to land a chess knight on every square of a board without ever revisiting a square. It is a classic implementation of the Knight's Tour, the centuries-old combinatorial problem, dressed up for the Macintosh with a clickable board.

How to play

The knight moves in the standard L-shape: one square horizontally or vertically, then one square diagonally outward in the same general direction. Players choose any starting square and click target squares to move. The goal is a complete tour with no repeats.

The puzzle's pedigree

The Knight's Tour has been studied since at least the 9th century and is solvable from many starting positions on a standard 8x8 board. Kelly's program packages the problem as a single-screen Mac puzzle, suited for short sessions and casual study.

Solution exists

The game documents that a complete tour is achievable, so persistence and a little planning are rewarded; brute clicking will not.

Distribution

Knight is preserved by Macintosh Garden among small Classic Mac board and puzzle games of the early 1990s.