The classic 15-puzzle game, the goal is ordering a set of numbered square tiles.
The classic 15-puzzle game (also called Gem Puzzle, Boss Puzzle, Game of Fifteen, Mystic Square and many others) is a sliding puzzle that consists of a frame of numbered square tiles in random order with one tile missing.
The object of the puzzle is to place the tiles in order (with the "hole" in the lower-right corner) by making sliding moves that use the empty space.
A Tip/Help functionality can help you to learn on how to solve the puzzle
(times will be added to the records only when you do not use TIPs)
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