This is the front side of Rubik's fifteen puzzle.

The goal is to unscramble the roman numbered tiles. This puzzle is different from other sliding puzzles, because it has no empty spaces in which a tile can be 'parked'. Also, the vertical rulers can block the top and bottom horizontal ruler.

Have fun solving this very interesting puzzle. But don't get too exited, because this puzzle isn't produced anymore, so it's hard to get one for yourself. On the other hand, there is a fine version on Maarten Net.

If you mastered this one, also try the back side of this puzzle.