How to Play 15 Puzzle
1
Slide the tiles
Click tiles adjacent to the empty space to slide them into it.
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13
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15
12
2
Arrange the numbers
Arrange numbers 1-15 in order from left to right, top to bottom. The empty space should be in the bottom-right corner.
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7
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15
3
Solve top rows first
Solve the top rows first, then the bottom rows. This strategy makes solving easier.
4
Use fewest moves
Try to solve the puzzle in as few moves as possible!