Stratagem No. 32 第三十二计 Desperate stratagems (败战计)
The empty fort strategy
Literal
The empty-city stratagem.
Show that you are empty, in a way that makes a cautious enemy suspect a hidden trap and refuse to walk in.
Source line
虚者虚之，疑中生疑；刚柔之际，奇而复奇。
Traditional 虛者虛之，疑中生疑；剛柔之際，奇而復奇。
Where you are empty, display the emptiness, so that doubt breeds more doubt. At the seam of hard and soft, pile surprise upon surprise.
Icons working translation — draft, pending review
The line names no hexagram: ‘hard and soft’ is the join between a bold face and a weak fact. You publish an emptiness you would normally hide, and it works only on an enemy already trained to think you never leave a gate open by accident.
三十六计 · Chinese Wikisource edition (public domain)
Meaning
The empty fort strategy means you are genuinely weak, and you show the weakness so plainly that a careful enemy cannot believe it. An open gate, a banquet on a half-built wall, a street with no soldiers and no dogs barking: each of these is an emptiness displayed, not an emptiness disguised. The enemy’s previous experience of you does the rest. If he thinks you are a man of ambushes, an open door reads as an ambush. Doubt meets the doubt he brought with him, which is the classical line.
The trick is brittle, and the commentary knows it. It works on a cautious commander and fails on a reckless one, who will walk in and thank you. It also works once. The second time, the open gate is only an open gate. Empty-fort stories are therefore stories about reputation: the defender spends years being the person who never takes a stupid risk, and then, on one bad afternoon, spends that reputation in a single afternoon. Without the reputation, the same gestures are suicide.
The story
The empty city, from novel to Guazhou 空城计
Mixed
The scene everyone can picture is a novel scene. In chapter 95 of the Romance of the Three Kingdoms, after Ma Su’s real defeat at Jieting in 228, Zhuge Liang is at Xicheng with almost no troops. He opens the gates, has soldiers sweep them, and sits on the wall with a qin. Sima Yi arrives, sees the calm, decides it is an ambush, and leaves. As fiction it is a perfect use of reputation: Sima Yi has spent the book believing that Zhuge Liang does not take unforced risks, so an easy city cannot be easy. Chen Shou’s Sanguozhi does not contain this afternoon. The qin on the wall is the fourteenth century.
A related anecdote was circulating in the fourth century. Guo Chong told it: Zhuge at Yangping, the army sent east with Wei Yan, a thin garrison, Sima Yi stumbling on the city and withdrawing from an open gate. Pei Songzhi copied the tale into his commentary and set out why he did not believe it. Zhuge’s camp at Yangping and Sima Yi’s post at Wan do not put the two men in one place, and their later confrontations were not at Yangping either. Pei also doubted that Sima Yi’s son would applaud a tale that made his father look a fool. The novel later moved the scene to Xicheng and added the qin.
The stratagem book does not rest on either version. It says that after Zhuge the trick had no shortage of users, and it tells two it likes. In 727 Tibetans had taken Guazhou and killed the Hexi commander Wang Junchuo. Zhang Shougui, sent to rebuild with the survivors, had the wall-frames barely up when the enemy came back. He put wine and music on the wall. They suspected a prepared defence and withdrew, and he then hit them as they went. The Bei Qi shu tells a cousin: Zu Ting, at Northern Xuzhou, left the gates open and the streets silent, even the dogs, then struck the drums. Both are displayed emptiness. Neither needs a qin.
Zhuge Liang’s qin on the wall is chapter 95 of the Romance of the Three Kingdoms, Guo Chong’s Yangping anecdote is preserved and rejected in Pei Songzhi’s commentary, Zhang Shougui at Guazhou in 727 is in the Jiu Tang shu, and Zu Ting’s open gates are in the Bei Qi shu.
Sources
- Luo Guanzhong, Romance of the Three Kingdoms 三国演义, ch. 95 (novel, 14th c.)
- Pei Songzhi’s commentary on Sanguozhi 三国志, quoting and rejecting Guo Chong
- Liu Xu and others, Jiu Tang shu 旧唐书, biography of Zhang Shougui
Myth check
The picture of Zhuge Liang playing a qin on an open wall is chapter 95 of the Romance of the Three Kingdoms, it is not in the Art of War, and Chen Shou does not tell it. An earlier and different anecdote, Guo Chong’s tale of Yangping, was already rejected by Pei Songzhi in the fifth century, and the historical cousins are later generals, not Zhuge Liang.
Modern application
The pattern is a weak position shown with so much calm that a cautious opponent invents the trap you do not have. An understaffed team that publishes its emptiness, ‘we are heads-down, the door is open, come and see’, can stall a rival who has learned to fear hidden work. It stalls them once. A reckless rival, or the same rival next quarter, walks through the open door and finds the sweepers.
Reputation is the real garrison. Years of never bluffing, never missing a deadline, never leaving a flank open, are what make a single calm afternoon readable as a trap. People who bluff every week cannot use this. Their open gate is believed, correctly. The stratagem spends a reputation. It does not create one. Build that record over years, or the open gate is only an open gate.
Takeaways
- Show the emptiness only to a cautious opponent.
- Spend a reputation for caution; do not invent one.
- Do not try the open gate a second time.
How to counter it
If a habitually careful opponent is suddenly, theatrically relaxed, with gates open and no visible guard, do not inherit his reputation as if it were evidence, and look instead for the actual troops, the logs, and the reserve. A reckless walk-in also works, because empty forts fail on people who are not afraid of looking foolish.
Questions
Did Zhuge Liang really use the empty fort strategy?
The famous version, a qin on the wall of Xicheng after the defeat at Jieting, is chapter 95 of the Romance of the Three Kingdoms, a novel of the fourteenth century. Chen Shou does not record it. A fourth-century tale by Guo Chong puts a similar trick at Yangping, and Pei Songzhi, commenting on the Sanguozhi, explains why he does not believe it. Later generals did use displayed emptiness.
What does the empty fort strategy mean?
It means showing a real weakness so plainly that a cautious enemy assumes a trap. An open gate or a banquet on the wall only works if he already thinks you never take a stupid risk. On a reckless enemy it is suicide, and it works only once. The classical line calls this doubt breeding more doubt, at the seam between a bold face and a weak fact.