GRIP FIGHTING
From the back there are basically 4 things your opponents might do with their hands to react. You have the Garcia Back Control grip, meaning you have your arms around them from the back like a seatbelt. It’s important that your bottom arm is grabbing your top arm’s wrist. (While all this is going on, remember to never cross your feet.)

Based on their hand positions, you have 4 options to get to the trigger position of a choke:
1 – Your opponent grabs your bottom arm with both hands:
Let them have your bottom arm. Punch it forward as you shoot your top arm across their neck and grab the back of their shoulder.
2 – Your opponent grabs your top arm with both hands:
Let go of your hands. Slip your bottom hand inside on top of their gripping wrist which is closest to that arm. Move your wrist forward, palm up, and get a gable grip with your top arm on top. Pull your wrists up and towards their shoulder. This will put pressure on their wrist and force them to let go. When they do, shoot your top arm up and grab the back of their shoulder.
3 – Your opponent grabs one wrist with each hand:
Let go of your hands. Grab their wrist gripping your bottom arm with your top wrist. Hold their wrist in place while you pull your bottom wrist up. when it’s free, use your bottom hand to grab their hand that was gripping it previously. forcefully push that wrist down towards your hips and trap that arm against your body with your leg on that side. Simultaneously, shoot your top arm across and grab the back of their shoulder.
4 – Your opponent grabs one of your arms with both hands and won’t let go.
Obviously if your opponent grabs one of your arms and is controlling it, they’ve taken it out of play, and you won’t be able to use it to finish. If they do this, you can still apply a choke with one arm. To do this, get your choking arm as far back behind their shoulder as possible. Once it’s as deep as you can get it, put your head onto their shoulder as you reach up and grab the back of your own neck. To do this, turn your face into their neck so that it’s easier for you to grab the back of your neck. Once you’ve got the back of your own neck, squeeze and flex your bicep and you’ll get the tap.

FINISHING THE CHOKE (with both hands)
Dan Severin:
When your arm is across their neck they will focus on pulling it down to avoid the choke. When they do, use the palm of your free arm and to push across your forearm, cleaning their grips off of it. When your choking arm is free enough, drive it deeper and get the Dan Severin grip behind their shoulder. Try to put the elbow of your backside arm on their spine. Put your face on top of their shoulder, squeeze and finish.

Rear Naked Choke:
If you can’t finish with the Severin grip, transition to the Rear Naked grip (birdman hand cross, slide to get the rear naked grip). Put your head on top their shoulder so they can’t pry your arms. Finish.