Find the gap
Only a tile directly beside the empty square can move. Tap it to slide it into the gap.
Classic logic, tuned for speed
Slide the numbers.
Quiet the noise.
The original sliding number challenge—rebuilt as a fast daily ritual. Every board is solvable. Every move counts.
Board
Time00:00.0
Moves000
Best—
Tap a neighboring tile or use arrow keys. Your best time stays on this device.
01
The rules
How to play 15 Puzzle
Build in layers
Arrange the top row first, then work downward without disturbing completed rows.
Finish in order
Win when tiles read 1 through 15 from left to right, with the empty square last.
A better solve
Speed comes from structure,
not frantic tapping.
Lock the first row, then the second. Solve the lower-left section before rotating the final tiles into place. A short plan beats dozens of corrections.
- Use corners as temporary parking spaces.
- Never finish tile 3 before positioning tile 4.
- Watch the empty square—the numbers follow it.
100%
solvable boards
Boards are generated by legal moves from a completed puzzle, so no run ends in an impossible state.
Quick answers
15 Puzzle FAQ
What is the 15 Puzzle?
It is a 4×4 sliding puzzle containing tiles numbered 1 to 15 and one empty space. The goal is to restore numerical order by sliding tiles.
Is every puzzle on this site solvable?
Yes. Each board begins solved and is scrambled through valid moves, which preserves solvability.
What is a good number of moves?
It depends on the scramble. First aim for a consistent solve, then compare your move count and time across daily boards.
Can I play on a phone?
Yes. The board is touch-friendly, responsive, and keeps controls outside the play area to prevent accidental taps.