Answer:
Genius.
As the great Sun Tzu has stated: So a military force has no constant formation, water has no constant shape: the ability to gain victory by changing and adapting according to the opponent is called genius.
Step-by-step explanation:
Sun Tsu recommends that in order to be successful in battle with an enemy, a commander must have flexibility and adapt to changing circumstances. The strategy and the tactics a general employs in one victorious battle, does not necessarily have to be the same in another engagement, he must make his decision according to the circumstances of the moment and the place. Sun Tzu says, "32. Therefore, just as water retains no constant shape, so in warfare there are no constant conditions."