---------------
    | A | E |   | F |
    |---|---|---|---|
    | L | C | H | B |
    |---|---|---|---|
    | M | G | K | D |
    |---|---|---|---|
    | O | J | I | N |
     ---------------
Number of moves = 4
You start with a load of jumbled up blocks and you have to slide them around to get this pattern:
--------------- | A | B | C | D | |---|---|---|---| | E | F | G | H | |---|---|---|---| | I | J | K | L | |---|---|---|---| | M | N | O | | ---------------
The rules are fairly obvious...you can only slide a tile into a vacant square, and then only a tile adjacent to said empty square.
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