One amazing strategy i just read from the ancient 36 strategies of the dragon's race.

[link to www.easy-strategy.com]

"16. In order to capture, one must let loose.

Cornered prey will often mount a final desperate attack. To prevent this you let the enemy believe he still has a chance for freedom.

His will to fight is thus dampened by his desire to escape.

When in the end the freedom is proven a falsehood the enemy's morale will be defeated and he will surrender without a fight."

This was also mentioned in the sun tzu's book the art of war where when you encircle an enemy you leave an opening so instead of fighting you with all he's got you distract him and waste his energy trying to escape while you kill him as easy as someones stabs him in the back.