Sliding Puzzle or 15-puzzle 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 by making sliding moves that use the empty space. Features ★ Multiple Puzzle Sizes – 8 puzzle, 15 puzzle and 24 puzzle ★ Total 125 starting positions in three puzzle sizes (3x3, 4x4, and 5x5)