Sliding Puzzle
Slide tiles into the correct order — the classic 15-puzzle!
Click a tile adjacent to the blank to slide it.
About Sliding Puzzle
The classic tile-sliding puzzle — also known as the 15-puzzle (4×4) or 8-puzzle (3×3). Slide numbered tiles into the correct order using the empty space. The fewer moves, the better!
How to Play
- Click any tile that is directly adjacent (up/down/left/right) to the blank space.
- The tile slides into the blank spot.
- Arrange all tiles in order (1, 2, 3… with blank at the end).
- Use arrow keys to slide the tile that would move in that direction.
- Try to solve it in as few moves as possible!
Frequently Asked Questions
Yes — the puzzle only generates solvable shuffles. Exactly half of all random arrangements are solvable; we check parity before presenting the puzzle.
The hardest possible 15-puzzle position requires 80 moves to solve optimally. A good human solution is typically under 150 moves.