This is the method of attacking by stratagem. ss. 3.7, Chapter 3: Attack by Stratagem

All men can see the tactics whereby I conquer, but what none... ss. 6.27, Chapter 6: Weak Points and Strong

In hemmed-in situations, you must resort to stratagem. In de... ss. 8.2, Chapter 8: Variation in Tactics

On hemmed-in ground, resort to stratagem. ss. 11.14, Chapter 11: The Nine Situations