Klotski: Sliding Block Puzzle

Klotski, also known as Huarong Dao, is the classic sliding-block puzzle: nothing is added or removed, you just shuffle pieces through the empty spaces until the large 2×2 block slides out through the gap at the bottom.

• Ten hand-made layouts, ordered from a quick warm-up to the famous classic and beyond
• Drag a block and it slides as far as the open space allows
• Moves and time are counted while you work
• Unlimited undo, so experimenting never costs you
• Each layout saves its own fewest moves and fastest time
• Restart any layout whenever you want a clean run

Solve it once, then come back and try it in fewer moves.