Intro:

15 Puzzle is a seemingly simple sliding blocks puzzle where you need to shift the pieces into numerical order. Unfortunately, the puzzle is not so easy. However, be assured that every puzzle the program generates is beatable.

To win, align the puzzle's pieces in ascending numerical order starting at the top left like so:

1---2---3---4
5---6---7---8
9---10--11- 12
13--14--15-

Simply click the puzzle piece you desire to move. For the puzzle piece to move, it must have a vacant slot directly next to it. The piece will then slide into the vacant slot. When the puzzle pieces are arranged in the configuration shown above, the player wins and the game is over.

Good Luck!