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15-PuzzleScreenshot 

 

15-Puzzle are entertainment software based on "sliding numbers" game. The object of the puzzle is to get all tiles in the correct order. The moves are made by sliding counters into empty square. The lower number of moves the better your score is! This game was invented in 1870s by Newyorker Noyes Chapman and was as popular worldwide as Rubik`s cube a century later.

Screenshot of 15-Puzzle