sortpuz
Unscramble a square matrix
of numbered tiles to put them in order. One tile at a
time may be exchanged with an adjacent empty slot. This
is similar to the classic sliding tile puzzle simply
called "The 15 Puzzle" (4 x 4 tiles numbered 1-15 plus an
empty slot). This version can range from 2 x 2 to 9 x 9
tiles.
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