th reference to the enemy.]

and hence we can hold the enemy's fate in our hands.
10. You may advance and be absolutely irresistible, if you
make for the enemy's weak points; you may retire and be safe from
pursuit if your movements are more rapid than those of the enemy.
11. If we wish to fight, the enemy can be forced to an
engagement even though he be sheltered behind a high rampart and
a deep ditch. All we need do is attack some other place that he
will be obliged to relieve.

[Tu Mu says: "If the enemy is the invading party, we can
cut his line of communications and occupy the roads by which he
will have to return; if we are the invaders, we may direct our
attack against the sovereign himself." It is clear that Sun Tzu,
unlike certain generals in the late Boer war, was no believer in
frontal attacks.]

12. If we do not wish to fight, we can prevent the enemy
from engaging us even though the lines of our encampment be
merely traced out on the ground. All we need do is to throw
something odd and unaccountable in his way.

[This extremely concise expression is intelligibly
paraphrased by Chia Lin: "even though we have constructed
neither wall nor ditch." Li Ch`uan says: "we puzzle him by
strange and unusual dispositions;" and Tu Mu finally clinches the
meaning by three illustrative anecdotes--one of Chu-ko Liang, who
when occupying Yang-p`ing and about to be attacked by Ssu-ma I,
suddenly struck his colors, stopped the beating of the drums, and
flung open the city gates, showing only a few men engaged in
sweeping and sprinkling the ground. This unexpected proceeding
had the intended effect; for Ssu-ma I, suspecting an ambush,
actually drew off his army and retreated. What Sun Tzu is
advocating here, therefore, is nothing more nor less than the
timely use of "bluff."]

13. By discovering the enemy's dispositions and remaining
invisible ourselves, we can keep our forces concentrated, while
the enemy's must be divided.

[The conclusion is perhaps not very obvious, but Chang Yu
(after Mei Yao-ch`en) rightly explains it thus: "If the enemy's
dispositions are visible, we can make for him in one body;
whereas, our own dispositions being kept secret, the enemy will
be obliged to divide his forces in order to guard against attack
from every quarter."]

14. We can form a single united body, while the enemy must
split up into fractions. Hence the