Thus, we can have differing versions of what is a win. A tactical victory can still be a strategic loss, and it matters not how many battles you win, if you end up losing the war. (Or the costs of the war bankrupt you, so that you are unable to enjoy the fruits of any victory, no matter how bitter.)
A tactical loss can entail a strategic victory if an overeager opponent capitalizes on their gains to the detriment of their overall strategy. If a loss leads to a win, was it really a loss?
To borrow from Sun Tzu, "Hence to fight and conquer in all your battles is not supreme excellence; supreme excellence consists in breaking the enemy's resistance without fighting." and "Therefore the skillful leader subdues the enemy's troops without any fighting; he captures their cities without laying siege to them; he overthrows their kingdom without lengthy operations in the field." (Art of War, Chapter 3, "Attack By Stratagem.") And one of the five essentials for victory: "He will win who knows when to fight and when not to fight."
I chose to offer to pay my X a trifling amount of alimony, 4% of what she actually asked for. Said 4% was also less than what I would expect in attorney fees defending against an alimony suit where I won. And who knows, I might have even lost the alimony suit. I chose not to fight (at best, winning a Pyrrhic victory, at worst, a far more expensive loss), and thus came out ahead.
My X chose to focus on something that was more important to her (and cost less to me than her alimony) rather than join battle over the matter or even accept the alimony.
With my forces (or in this context, resources), I disputed the mastery of the situation, and thus without spending my resources, my triumph was complete. This was the method of attacking by stratagem.