🔢 Sliding Puzzle
Slide tiles into numerical order from 1 to the end. One space is empty. Click any tile next to the empty space to slide it in. Arrow keys also work.
Tap a tile to slide it into the empty space. Arrow keys move the empty space.
How to Play the Sliding Puzzle
Click any tile adjacent to the empty space to slide it into the gap. The goal is to arrange all tiles in numerical order from 1 upward, with the empty space in the bottom-right corner. Arrow keys move the empty space in that direction, pulling the adjacent tile with it.
Is It Always Solvable?
Not every random arrangement of tiles can be solved. Exactly half of all possible arrangements are unsolvable due to parity constraints. This version checks solvability before presenting any puzzle, so every game you get is guaranteed to have a solution.
Strategy
Solve the top rows first, then the left column, working down and right. Avoid moving tiles out of already-solved positions. The last 2x2 area in the bottom-right requires a specific rotation sequence to complete without disturbing the rest of the board.