Artemis BJJ (MYGYM Bristol), Can Sönmez, Bristol, UK - 09/12/2016
You're going for the outer roll sweep, but they block it, either from good base or raising up. You can then switch to the waiter sweep. Your arm that was holding their knee goes behind to their hip (near your head). Kick your legs up above their knee and start to swivel, so your bum points in the same direction as their bum. The hand your hand underneath their leg scoops behind their trapped ankle.
You are aiming to keep scooping, in order to turn their knee back and eventually get their ankle into the crook of your arm (your hand looks a bit like a waiter holding a dish at this point, hence the name of the sweep). Kick your top leg forward and roll through. Maintain the tension and grips to stop them closing their legs back up, then turn through to pass into side control.
Teaching Notes: I think deep half is too complex for beginners, but I'll do a couple more classes on it. People were getting confused on the right direction to turn, which leg to grab, where to put their head and so on. It's a good technique, but one that needs understanding of deep half guard first. I'll save it for the intermediate class (at the moment, we just have one of those with Paul teaching, but I'd like to put on another one at some point too, especially as there are quite a few people now with two or more years of training under their belts).