Say a sturzhau is only defined or given in example on one side, and the exact same technique is performed on the left side, yet given a different name, that bugs me.
Understandable, but there's a few possible reasons why, as well as some repeated examples of this.
First, "symmetry" in medieval terms was two lions rampant facing one way, not one facing each way, as we'd do it now. With that mind set, it's easier to see that a strike from a certain side has one name, and is considered to be a different strike or guard from the other side.
Frex:
Zornhau is from the right. What do they call it when it comes from the left? I've only seen it referred to as an "oberhau." Pflug, in many manuals, is "upside down" on the left. Ringeck refers to "Nebenhut" on the left, but the techniques are all pretty clearly coming from what Meyer and others later call wechsel...which is common on the left but rare or undocumented on the right...where the same later authors refer to Nebenhut on the right.
As for the schiller/sturzhau, it's more possible that the earliest masters didn't differentiate, but there's a problem. The Schiller is perfromed with uncrossed arms (similar to the position of left ochs), but from the right side. Sturzhau is performed with crossed arms, like right ochs, but also from the right side. Likewsie, both attacks are aimed at the scalp or the opponent's right shoulder. So these aren't just mirror-image techniques of each other, but two different methods of cutting downward with the short edge. And the differentiation of crossed and uncrossed arms is not a small one, as winding and binding always reveal. Thus it's understandable to me that they would want to differentiate so that when the master says to the scholar, "attack me with a schiller" he knows what's coming, and how it's going to react to the bind. He can't say "attack me with a schiller from the left" if he means a sturzhau, because a sturzhau is a schiller from the right with crossed arms.
Okay, so those arguments were pretty disjointed, but do you see what I'm getting at?
Jake
Sen. Free Scholar
ARMA Deputy Director