classic 15 puzzle

Features classic 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 also exists in other sizes, particularly the smaller 8-puzzle.
The object of the puzzle is to place the tiles in order from first to last tile by moving the tile next to the empty space into it.puzzle can be:3x3 (8-puzzle or 9-puzzle),4x4 (15-puzzle or 16-puzzle),5x5 (24-puzzle or 25-puzzle) or6x6 (35-puzzle or 36-puzzle)