I'm hitting this transition all day now. The key for me is actually to control the crossfacing arm and drive it over you (you can use both hands, as if you were going for a kimura -- in fact the kimura attempt helps set this up). Then you switch to pushing against the armpit, so that he is sprawled over your body. You will get the leg easy if that happens. I "hoist" the guy up with my legs, pulling them towards me as I push the armpit. Even if you don't have the leg, the guy's hips are raised up. It's exactly like pulling x guard. In fact you can pull x guard, if you so choose, but it's not necessary. I just scoot out the back door mostly, with the guy pushed into "wheelbarrow" mode.
Like in that picture, if Leo just pulls his knees to his chest as he pulls on the leg and pushes the armpit, it will elevate the guy and make it very easy to slip under him. You can actually sweep the guy over your head from there, but I've been unable to hit that sweep as of yet. The point is to get the guy's hips raised high up, then he's doomed.
I am starting out my half guard with a DLR/Reverse DLR type position, what I think of as "open half guard." As the half guard gets tighter, I use Z guard to freeze the opponent with space. I use that space to work around for an attack, either arm dragging the near arm, kimuraing the far arm, grabbing the foot, or taking an underhook and "kicking" through. There is so much to do ... the point is that the z guard gives you time and space to set it all up and launch into it.
I'm also playing a lot of "shin" guard by passing the lapel and trapping the guy's shin against my own. Have not had great success with finishing from that position, but still fun.
A key thing for my z guard is to point the trapping foot *down*, just as gustavo machado shows for the quarter guard. The principles are quite similar.
So much fun with the half guard these days. It's ridiculous how many variations and sweeps you can play. It's finally getting some teeth to it.
I was hoping you'd stop in. I know you've been working on this and I wanted to hear what you'd found out so far.
What you said reaffirms several things I was thinking. My approach to deep half guard has been to apply many of the same concepts I learned with half butterfly and x-guard. This includes:
- underhooking the free (or posting) leg and pulling it up on my shoulder
- crunching my legs to my chest to pull them over me
- diving deep underneath with commitment
- getting my hips under their hips
- lifting their hips and keeping them elevated
- rocking them back and forth so they can't settle down
- making them lurch forward into a "Superman" posture (both hands outstretched)
- traffic cop the armpit/ribs to keep them away
- putting their weight on their hands keeps them from crossfacing
- stretching their legs apart to break their base
- keeping moving out the back door and trying to get to my elbow
I can probably think of a few more but that's most of it. These apply to half guard, half butterfly, full butterfly, reverse De la Riva, x-guard and probably many more as yet unnamed guards. It applies to the "deep z-guard" you and I are working on.
Leo's full sequence is actually going all the way to x-guard through the "leglock guard" or "one-leg guard" or whatever you want to call it:
http://www.aesopian.com/18/marcelos-half-to-x-guard-transition/
Denis Hallman shows a similar sequence in the new Jiu-Jitsu Cookbook DVD he did with Monson. He does a "legoplata" into heelhook but the entry is the same. I know the kneebar fatu is talking about and it's a good one. I may play with it once I'm succeeding with the position and move on to submissions.
Last Sunday I was working with a friend, drilling some stuff. We were finishing up and about to spar when I remembered the deep half guard.
I'd been thinking about it since it's come up more lately. People have been asking me to do a tutorial on Wilson Reis' sweep in the EGO tournament highlight (which I haven't done since I don't really use it or have anything original to add). NHBGear had a thread going dedicated to Jeff Glover's half guard game. MMA.tv has weekly threads on going out the back door from half guard. Leo Kirby even sent me footage of Jorge Vidal teaching his half guard, which I put up on my journal.
But I'd already worked on enough technique for the night so I sparred instead of drilling it.
Within the first minute, my previously injured ankle gets reinjured. Pretty badly. It's throbbing in pain and I can't use it for anything. No more butterfly hooks or closed guard. And where do I find myself? Half guard. So what do? Put the knee in and go deep.
Surprisingly, it worked great. It had much the same feel as x-guard but with little different quirks. It felt right and I decided to work on it more.
Afterwards I remembered how I'd seen something like this in Baret Yoshida's book/DVD. Here are some screenshots.
Baret is in half guard.
He bumps them up with his framing hand and escapes his hips so he can bring his knee across their chest as he underhooks the free leg.
He elevates them and gets underneath using several pressures at once. He dives under, pulling himself in with the arm under the leg and switching his hips. His other hand grabs over their shoulder and yanks them forward. His knee on the chest lift them and carries them forward. He also crunches and pulls his knees towards his head to lift them. You can see how their legs are coming off the ground as he gets underneath their hips.
This position, with the knee across their chest while I'm underhooking deep under their leg, is the one I want to focus on.
Baret swivels his bottom leg to bring his knee under their hips. He's now in a position similar to reverse DLR. The knee and shin under their butt/thigh keeps them elevated and he can kick with it to lift them and send them further forward.
Jorge does the same thing with his knee:
http://www.aesopian.com/164/jorges-half-guard/
Notice how he's spread their legs to break their base and how they have most of their weight forward on their hands. This makes the next step easy.
He sits up and gets to his hands. He's still using his shin to kick their leg away. You can also use the other leg to step on the inside of their knee (not shown in this screenshot though).
This will be a very familiar movement if you've played x-guard or favored a similar butterfly guard sweep. That's why I like it so much.
Doing a technical stand-up and taking them down to finish.
The main points in Baret's technique that I want to steal are being deep under their free leg while having my knee across their chest, and getting the other knee up under their hips to keep them elevated. These effectively keep them from crushing me, which makes me very happy, and I can play the position almost exactly like I would x-guard, so I'm not having to learn everything from scratch.
Like you said, having the knee in also gives you time (and leverage) to set things up. Wilson's sweep from half guard is much like the one Baret shows (expect he doesn't stand up all the way). But he gets it by explosively flying under them and driving up from below. I don't have that speed and power. So the z-guard knee looks promising as a replacement.