How to win ?

I was looking for lots of materials,and found that maybe there are some ways.According to Tae Kwon Do encyclopedia,reaction force,concentration,breath control and speed can improve one's power!

and according to your question, it only reminds me on how can David defeated a giant Goliath.... that David choose to use a projectile slingshot and enough to defeat Goliath... a slingshot can hit opponent a far distance away making it David looked more taller than Goliath; David more taller than Goliath; and David more powerful than Goliath. as the Slingshot can hit opponent far distance compare to javelin spear, sword and fist. Therefore, the only way that a small, thin girl can defeat a strong taller boy is through sparring with the use of weapons... Female are more flexible than male... that if a Female only learns Kung Fu in the art of Kiam Sut (Jian Shu) translated in English as Chinese Straight Sword, then female can be more fatal compare to a boy who knows how to use arnis Filipino stick fighting.

Thanks for your advice!