15 puzzle: a tile sliding game

Here's something different for today. You've seen these before; the object of the game is to put the tiles in order by using the empty space to slide them. Have fun!

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  1. Don't even need to solve it to know where you got the image from :)

    1. Haha yes. But solving it is a difficult task, really difficult for human. Maybe we can make a mathematical model and solve it using computer.

    2. The programming sounds harder than just solving the game! Maybe I'll try it in a future post sometime?