About the game
Fifteen without limits — play online for free
Fifteen Unlimited is the endless version of the classic sliding-tile puzzle. There is no need to wait for tomorrow’s puzzle: solve one arrangement and you get a new one right away. Move the tiles around the board and put the numbers back in order using the only empty cell.
The mode is perfect for warming up before the daily puzzle, passing the time or simply playing as much as you like. No sign-up or download is needed — the game runs in your browser on a computer, tablet or phone.
Unlimited or the daily puzzle: what is the difference
| Feature | Unlimited | Daily puzzle |
|---|---|---|
| Rounds | No limit | One per day |
| Arrangement | Random | The same for all players |
| Waiting | A new round right away | A new puzzle in 24 hours |
| Best for | Practice and long sessions | A daily habit |
Want a daily challenge? Try Fifteen: daily puzzle
How to play Fifteen Unlimited
- 1Choose the board size: 3x3, 4x4 or 5x5.
- 2Tap a tile next to the empty cell — it will slide into the free space.
- 3Put all the numbers in ascending order to .
- 4Finished a round? Start a new one right away — solve the puzzle.
What to solve
The puzzle is solved when all the numbers are in order — left to right and top to bottom — and the empty cell is in the bottom-right corner. On a 3x3 board that is numbers 1 to 8, on 4x4 — 1 to 15, on 5x5 — 1 to 24.
Difficulty levels
| Mode | Board size | Who it is for |
|---|---|---|
| Easy | 3x3 (8 tiles) | For a quick warm-up and beginners |
| Classic | 4x4 (15 tiles) | The familiar Fifteen format |
| Hard | 5x5 (24 tiles) | For experienced players |
How to practise and solve faster
- Solve the board layer by layer: first the top row, then the left column, and so on to the end.
- Start with 3x3 to learn the techniques, then move on to 4x4 and 5x5.
- Place the last two tiles of a row together rather than one at a time — that way they are less likely to get stuck.
- After a round, think back to where you lost the most moves.
- Practise in Unlimited, then test yourself in the daily puzzle.
Why Fifteen Unlimited is convenient
No limit on rounds
Play again and again as many times as you like, without waiting for the next day.
Three board sizes
Choose 3x3, 4x4 or 5x5 — from a quick warm-up to a tough puzzle.
Free and no sign-up
Start playing right away: no account or app install required.
Works on any device
The responsive interface works just as well on a phone and a computer.
Frequently asked questions about Fifteen Unlimited
How is Fifteen Unlimited different from the daily puzzle?
The daily puzzle gives everyone one arrangement per day. In Unlimited, arrangements are generated randomly, and you can start a new round right away after each one.
How many rounds can I play?
As many as you like. There is no daily limit on the number of games.
How do you move the tiles in Fifteen?
Tap the tile next to the empty cell and it will slide into the free space. Tiles only move horizontally and vertically.
Can arrangements repeat?
Arrangements are generated randomly, so in rare cases the same one may come up again.
Do I need an account?
No. You can play for free without signing up right in your browser.