How often have I discussed this? Great read. Article Geometry Hacks! "If you are going to constrain your opponent’s blade and thrust forward, there are many things that will help you. Things like strong/weak of the blade are important, as well as basic lever actions which are fairly intuitive. What I want to talk about is:
Moving your hand(s) further across the center.
Moving your hand(s) higher.
Both of these things help you get a better mechanical advantage over your adversary, but have a natural limit. If you cross over the centerline too strongly you take the sword out of your body’s centerline, and lose structure. The way to avoid this is to turn your body to match the new position, which then creates its own tactical problems."