The 108 moves Yang Taiji form has one right leg "outside crescent kick". I assume the left leg "outside crescent kick" is not in the form because the form creator might assume that students could reverse the form themselves. But what I don't understand is why the "inside crescent kick" is not in the form. We may assume that if the form creator understood the "outside crescent kick", he should also understand the "inside crescent kick". Why did he include one but not the other?
What's your opinion on this?
First, Speaking as one with over 30 year in Yang style, although I do not think you meant it this way, I find the title somewhat insulting and borderline style bashing.
There is also no triangle choke or figure four leg lock either..... was that illogical for the time period in China. Shuaijiao has very few, if any kicks or punches, was that illogical on the part of whoever came up with it?
But to the point. Is there an inside crescent in Chen style? Now there might be, I only learned an old Chen form that was supposed to predate the division of the style into Laojia Yilu and Laojia Erlu. And I learned Laojia Yilu and Chen Zhenglei's short form. I don't remember one, but it has been awhile. Yang comes from Chen style. But then I don't remeber an inside creseant in Wu or Sun styles either, but those came after Yang
I trained an inside crescent many years ago, when I use to practice a lot of kicks on a heavy bag. At least for me it had less power and that an outside crescent.
This is pure speculation on my part, when the forms were made, fighting was a bit different, the chance of facing a Jian, a Dao, a spear, or a staff was much more likely then than it is now It seems to me an an inside crescent can potentially leave you fairly vulnerable. You were not there, you do not know the logic behind it, and for that matter you do not even know the original form of Yang as it came from Yang Luchan, or what was practiced by Yang Banhou, Yang Jianhou or Yang Shouhou. Or for that matter what was originally done by Yang Chengfu..... and to be honest, no one really does, many claim then do, but what I know about Chen and the things Yang Chengfu removed, I doubt they do either, save one guy I saw do a form in China that was allegedly from Banhou.... he may have the form.