Publisher`s description - The 15 Puzzle
The 15-puzzle (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 puzzle exists in three sizes 4 X 4 - easy level, 5 X 5 - medium level, 6X 6 - hard level, when the puzzle has a greater number of tiles it's much more challenging to assemble. You can also generate puzzle from your own images.
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