Klotski Puzzle - Play Huarong Dao Sliding Block Puzzle Online Free
What Is Huarong Dao?
Huarong Dao (华容道) is one of the oldest known sliding-block puzzles, from China: a board holds the warlord Cao Cao as a large 2×2 block, a ring of generals as 1×2 and 2×1 blocks, and soldiers as 1×1 squares — and you must slide them, without lifting or rotating any block, until Cao Cao escapes through the opening at the bottom. It is a legendary test of spatial planning, free in your browser.
How to Play Huarong Dao
- Read the board. Cao Cao is the large 2×2 block; the generals are the long 1×2 / 2×1 blocks; the soldiers are the small 1×1 squares.
- Drag any block to slide it. Blocks move only horizontally or vertically, into an empty space — they can never rotate or overlap.
- Open a path to the exit. The puzzle is solved when Cao Cao slides down through the opening at the bottom of the board.
Huarong Dao Pieces & Layouts
| Piece | Shape | Role |
|---|---|---|
| Cao Cao (曹操) | 2×2 | Must escape through the bottom exit |
| Generals (关羽 张飞 赵云 马超 黄忠) | 1×2 or 2×1 | Blocking blocks to route around |
| Soldiers (兵) | 1×1 | Small fillers — key to opening gaps |
Strategy Tips
- Create open space near Cao Cao. Every slide needs an empty cell, so the first task is clearing room around the big block so it can begin its journey.
- Use soldiers as moving gaps. The 1×1 soldiers are the only truly flexible pieces — park them wherever you need a slot, then move them out when a bigger block must pass.
- Plan several moves ahead. Like chess, each slide closes one option and opens another; if stuck, trace Cao Cao's exit path backwards to see which blocking piece must move first.
Huarong Dao FAQ
Is Huarong Dao free to play?
Yes — it is completely free on this site. No paywall, no download and no account; open the page and start sliding.
Can blocks rotate?
No. Every block stays in its fixed orientation and can only slide horizontally or vertically into an empty space — rotation is the one move the puzzle forbids.
What are the classic layouts?
Famous formations include 横刀立马 (the balanced classic), 指挥若定, 兵分三路, 层层设防, 水泄不通 and 三军联防 — each a different arrangement of the same pieces, from gentle to very hard.