Klotski
Slide blocks to free the big one out the exit.
↑ This is Klotski running right here in your browser — no download needed.
About the game
Klotski is a sliding-block puzzle: rearrange the pieces in a frame so the largest block can slide out through a gap at the bottom.
How to play
Shift blocks into the empty space to open a route. The aim is to move the large 2x2 block to the exit slot at the bottom.
Tips & strategy
['Keep the big block moving downward whenever possible.', 'Avoid boxing the big block between small pieces.', 'Solve the corners first to free central space.']
Advanced guide
Klotski is solved by patience and order. Keep the 2x2 block descending; never let small pieces pile above it. Work the corners to create vertical breathing room, and if you stall, reverse a few moves rather than scrambling randomly.
History & origins
Klotski, known in China as 'Hua Rong Dao', is a classic rearrangement puzzle with thousands of solutions.
Frequently Asked Questions
What is the minimum number of moves?
The classic layout is solvable in 81 moves.
Why does it feel stuck?
You may have trapped the big block; backtrack a few steps.
Can small blocks block the exit?
Yes - keep the exit lane clear of 1x1 pieces.
Is there a guaranteed method?
Yes, by methodically cycling blocks to walk the big one down.
Does the board size matter?
The standard 4x5 frame defines the puzzle.
How do I start?
Free the cells directly above the big block first.
Where can I play Klotski for free?
Right on this page — Klotski is embedded above, free, legal, and with no download or sign-up. Play with your keyboard on desktop or touch controls on mobile. Your best score is saved in your browser, so it's still there next time. Every game here is original or open-source, with links that stay valid.