"Who said anything about going back? There's more than one way to skin a cat."
*I simply crouch, bringing my shield above me, blocking your sword once again, and also bringing my sword back to me. With me in this low position and you being unable to get past my bone shield with your sword, and with me expecting you expecting me to stab at your legs, I instead place my sword vertically in between your legs and bring it up powerfully and quickly with both of my hands, as I'm doing this, the sword would slide off my shield, making you disheveled, along with the pain of me slicing through/into your 'lower extremities' *cough cough*. I then once again bring my sword back and then go for a one handed horizontal slice from the right at your disheveled abdomen.*
*As you go to crouch, I simply do the same as I'm swinging my sword; again, with my sword on the inside, and both your blade and shield on the outside, as I match your movements, it makes it impossible for you to block my slash, especially since my blade is moving diagonally across your chest to strike under your arm; though, admittedly, with my crouching motion, striking your arm becomes much more difficult, and the majority of the strength of the slash is directed in diagonally across your chest, from your low-left to upper right.
And, again, as you try to position your your sword, which was previously locked against my shield, I rotate my shield so that it continuously matches your blade, preventing you from ever getting a chance to bring it to the inside, much less from underneath; if you wished to do so, you'd be forced to do it with an overhead slash, something I'd very easily block with my shield.
Therefore, with my simple movement of crouching, and keeping my shield poised on your sword, I've managed to negate your attempt at stealing the offensive, while continuing, and thus finishing my own by striking you.
From the crouched position, though, I would push off the ground explosively, jumping backwards, to create some distance.*
"True. And every dog has his day."