The 15 puzzle is a sliding puzzle having 15 square tiles numbered 1–15 in a frame that is 4 tiles high and 4 tiles wide, leaving one unoccupied tile position tiles in the same row or column of open space can be moved by moving them horizontally or vertically, respectively. The object of the puzzle is to arrange the tiles in numerical order. The numbers are placed randomly. Click on the square tile or move it and it will move to a closer location. Try to complete the puzzle using as few moves as possible.