Sliding Puzzle

How to play

Click any tile directly next to the empty square to slide it into that space. Keep sliding tiles until the numbers read 1 through 15 in order, left to right, top to bottom, with the empty square in the bottom-right corner. Every shuffle is generated by making random legal moves from the solved state, so every puzzle you get is guaranteed solvable.

Frequently asked questions

Is every shuffle solvable?

Yes. Unlike a fully random tile arrangement (where roughly half of all arrangements are mathematically unsolvable), this puzzle is shuffled by making random valid slides from the solved position, which always leaves it solvable.

Is my move count saved?

No — the move counter resets to zero each time you shuffle. It's not saved between visits.

What's a good move count?

Solving a 4×4 board in under 80-100 moves is solid for a casual attempt; experienced solvers using a systematic row-by-row method often finish in 60-80.