Sliding Puzzle
Slide the tiles into order — the classic 15 puzzle.
How to play
Slide tiles into the single gap; win when the numbers are in order with the blank at the end.
Solve the top row and left column first; every shuffle is always solvable.
About the 15 puzzle
The 4×4 “15 puzzle” was an 1880s craze and remains a classic test of planning.