Board
Today's board ／ No. 0Moves
0
Fewest
—
Placed
15/15
Today's ranking
Nobody has submitted yet
What gets sent is the sequence of moves, not a score — the move count is recomputed on the other end. No files are sent.
Today's board is the same for everyone, and always 4x4.
Press a tile in the same row or column as the gap and it slides, along with everything between. Put them in order to finish.
Keyboard: arrow keys slide a tile in the direction you press
Slide numbered tiles into the single empty square until they run in order. Every shuffle here can be solved. Choose 3x3, 4x4 or 5x5; the fewest moves is what gets recorded.
Questions
Do I need an account?
No. Opening the page is the whole setup.
Is every shuffle really solvable?
Yes. The board is shuffled by sliding tiles from the solved position, so reversing those slides always works.
Where is my record kept?
In this browser on this device, separately for each board size. The one exception is pressing Submit on today's board, which sends your name and your sequence of moves so the ranking can list it. Nothing leaves unless you press it.
What is sent to the ranking?
The sequence of moves you played, not a score. The move count is recomputed on the other end by replaying that sequence. Accepting a score directly would let anyone submit any number they liked. No files are sent.
Does it work on a phone?
Yes. Press a tile and it slides.
Does it work offline?
Yes. Once the page has loaded, it plays through with the network off.
What if I stop halfway?
The board and the move count are kept, and reopening resumes from there.