Huarongdao (Klotski)
Slide Cao Cao to break through
About the Game
Huarongdao, rooted in the Three Kingdoms story: after Red Cliffs, Cao Cao retreats and meets Guan Yu at Huarong Road. The puzzle recreates this escape: your goal is to slide ‘Cao Cao’ to the exit in as few moves as possible.
It belongs to the sliding-block puzzle family: from ancient China’s nine-palace rearrangement to Europe’s Fifteen Puzzle and France’s Red Stallion. It spread via Arabia and Japan, then re‑emerged widely in modern times.
Explore Game Details
Frequently Asked Questions
Have another question? Let us know.
Where is the exit?
At the bottom center gate (two cells). It’s highlighted with green stripes and a threshold bar. A label ‘EXIT’ sits below the gate.
How do I move pieces?
Touch/mouse drag is supported. Slide toward a direction over ~24px to move one cell. Directional buttons are available as a helper.
What is the win condition?
Move the 2×2 ‘Cao Cao’ to the bottom center gate (classic board coordinate ~ x=1, y=3).
Are there levels and difficulties?
Yes: Level 1 (Unblock‑it‑2 beginner set), Classic sequence (45 levels), and Advanced pack with iconic layouts.
How are minimal steps and best records shown?
Each level shows a reference minimal step count (mini). Best moves and time are saved per pack+level in localStorage.
Restart or continue?
Use ‘Restart’ anytime. The completion modal offers ‘Play Again / Next Level’ for smooth progression.
Undo supported?
Not currently. We plan to evaluate an undo/redo stack without compromising minimal‑step tracking.
Custom or extended levels?
Planned: import/share user levels. For now, you can add custom boards directly in levels.ts to extend the set.
Why are some boards similar or unsolvable?
We’ve removed unsolvable and duplicate layouts (e.g., 48 unsolvable, 49 equivalent to 22). The classic set is curated from references and testing.
Psychology Behind
Visuospatial Reasoning
Plan paths and move sequences on a constrained board to strengthen spatial representations and problem decomposition.
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