Huarongdao: Learning to Move the Empty Space

The most frustrating thing about Huarongdao is that Cao Cao can seem close to the exit yet refuse to move through it. If the large block cannot move, a smaller one must shift first. If that too is blocked, the empty space has to be brought around from elsewhere. The game is not about pushing the target straight ahead, but arranging room for it to pass.

A 2013 People’s Daily website retrospective records that Huarongdao, also called ‘Catch and Release Cao’, was popular in Beijing before the 1970s. It had therefore reached some households early, though this does not mean everyone born in the 1960s played it. Manufactured versions used wooden blocks. A cardboard imitation requires pieces cut to a common unit and placed within a rimmed base, leaving two small squares empty. Pieces slide; they cannot be lifted over others, or the difficulty disappears.

Only one pair of hands can operate the puzzle at a time, yet it readily attracts onlookers. Someone suggests moving a piece back; the player objects to the advice, then passes the board over when stuck. This describes an interaction the game makes familiar, not a particular personal memory. What matters most is not who memorises the whole solution, but whether, after resetting the pieces, the group can identify the move that trapped the empty space. A small set of pieces keeps waiting, offering suggestions and admitting mistakes together on one tabletop.

https://politics.people.com.cn/n/2013/0530/c70731-21671124.html
https://case.ntu.edu.tw/華容道chinese-slider-puzzle/index.html