15 Puzzle — Free Sliding Number Game
Slide numbered tiles into order using one empty space
Runs in your browser · nothing is uploaded
Make room for order.
Slide the numbers into place, from 1 to 15.
Shuffle the puzzle to begin. Empty space: Row 4, Column 4
How to play
Tap a tile directly beside the empty space. Focus the board and use arrow keys to move the empty space in that direction. Arrange 1–15 in order with the bottom-right space empty.
Every shuffle is solvable. A minimum move count or difficulty is not guaranteed. Refreshing clears your progress.A little space for a numerical challenge
Arrange the fifteen numbered tiles from left to right, top to bottom, leaving the bottom-right space empty. Your game runs in the browser, and game inputs are not sent to a server.
How to play
- Select Shuffle puzzle to begin.
- Tap a tile directly above, below or beside the empty space.
- Focus the board and use arrow keys to move the empty space.
- Undo moves to retrace your route, or replay the same starting arrangement.
Rules and example
If the top three rows are complete and the bottom row is 13 · 14 · empty · 15, tap 15 to finish. Tiles cannot move diagonally or wrap between rows. The In place counter counts tiles currently at their target positions; it is not an estimate of remaining moves.
FAQ
Is every shuffled puzzle solvable?
Yes. Shuffling uses only legal moves from the solved board. It does not guarantee a particular difficulty or minimum solution length.
How do arrow keys work?
Focus the board and press an arrow key to move the empty space in that direction. The adjacent numbered tile moves in the opposite direction.
Can I replay the same board?
Replay same puzzle returns to the starting arrangement. New puzzle generates another arrangement. Refreshing clears the current game.
