Solved order
Place tiles 1–15 in ascending order, reading across rows, leaving the final bottom-right cell empty.
Sliding tile puzzle strategy — Guide
Guidance for Sliding Number Puzzle. Practical instructions, limitations, and accuracy tips.
This article explains the use and limitations of the interactive tool. No signup is required. Output can be approximate and should not substitute for authoritative sources when the stakes are high.
Legal moves
Only tiles adjacent to the empty cell vertically or horizontally may slide into it.
Solvable shuffle
The puzzle starts solved and then makes legal random moves, ensuring that the resulting layout can be solved.