You're a little off-track here.
What you're describing is simply stepping in the bow stance to change distance as its main function.
Not so. What I was describing was a setup for a pretty sneaky attack - not a simple step.
The topic is a specific stance (no distance change required) whose very nature provides function such as bracing against a pull and able to provide torque for various applications as well as slipping a strike when pivoted into. It may resemble the halfway point in a crossover step but is a slightly different animal, mostly because it is rooted and locked.
Every stance is transitional (even a basic fighting stance, if you think about it). I am well aware of the types of application you are describing, of course. Specifically in Kenpo, we are differentiating between a crossover stance and a twist stance to cover the various possibilities.
I was simply outlining another application for what is called
kosa-dachi or
kake-dachi in the Japanese Karate styles I studied back in the day. Apart from
kata, where it is commonly seen, it is not generally used in modern Karate much. However, kenpoists use it all the time - which might be of interest to some other posters here.
It's not "a very surprising kind of maneuver" as it's a basic and very common tactic found in many styles' sparring.
There may be some other arts employing that kind of maneuver as well, but I don't think it's "a very common tactic" overall.
For those with experience, it's a rather slow setup and telegraphs its intention.
Actually, it often takes practitioners of the many styles that don't include it in their own curriculum by surprise. That is,
when combined with the kind of feint I mentioned (typically a backfist or a vertical punch).
More common and faster would be a shuffle step where the back foot comes up to the front, but not so far as crossing over.
Correct, but that version covers less distance.
This is often done as a skipping motion to further speed it up and was used to great effect by Joe Lewis to land his side thrust kick.
Don't take this reply in a defensive manner as your post suggests limited experience and there is some risk in that
.
Oh thanks for the patronizing ad hominem! I doubt that you are in a position to judge my level of experience based on a single post. Even if I tell you that I am a second-generation Ed Parker student, what does this mean to you? I won't go down this road.
Part of the fun in MA is discovering its subtleties and variety.
A prerequisite for this would be an open mind, though - the proverbial "empty cup".