Art of War 6.22

Capt. Calthrop quite unwarrantably translates: “If the enemy be many in number, prevent him,” etc.

This is the first of four similarly constructed sentences, all of which present decided difficulties. Chang Yü explains 知得失之計 as 知其計之得失. This is perhaps the best way of taking the words, though Chia Lin, referring 計 to ourselves and not the enemy, offers the alternative of 我得彼失之計皆先知也 “Know beforehand all plans conducive to our success and to the enemy’s failure.”