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How to play
- The numbers 1 to n² are scrambled on the grid.
- A move slides a whole row left or right, or a whole column up or down, by one step; the number pushed off one end comes back at the other.
- Put the numbers back in reading order: 1 at top left, n² at bottom right.
- Use the arrows around the grid to slide each row and column.
About Sixteen
Play Sixteen free online: numbers scrambled on a 3×3, 4×4 or 5×5 grid, each move slides a whole row or column one step with wrap-around, and the goal is reading order again; hints, move counts and a daily puzzle.
Sixteen: common questions
- How is Sixteen different from the fifteen puzzle?
- There is no gap. Every move slides a whole row or column, and the number pushed off one edge reappears at the other, so all the numbers in that line move at once.
- How do I move one number without wrecking the rest?
- Shift its column so the number reaches the row you are building, shift that row to place it, then shift the column back. Only the unsolved rows below are disturbed.
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