Leopardfist is a 2-on-1 with 2 points of control, not three, and one of the points is a specific piece of bone. The points are the wrist and the humerus bone in the upper arm. Another variant is the wrist and the coronoid process of the ulna at the elbow, what some people call "the crazy bone".
The Leopardfist is not used against a straight arm but only against a bent arm, so it is a perfect compliment to Bent Russian and Jacket Pin.
The idea is that when the Badguy's arm is bent at 90 degrees with the elbow pointed up, the Badguy is easy to send to the wall with these 2 points of control.
The trick is getting the elbow pointed up. If the arm is loose or moving in that direction anyway, the Leopardfist is yours. If the arm tight, you may have to attack with something else, like Bent Russian or Jacket pin (see later), and it is through timing that you will you know when to attack and with what.
Once you get the Badguy to the wall, the Leopardfist becomes a shoulder lock:
1-Just as in Walltap, the Badguy's shoulder must be touching the wall. So, you use your control of the humerus/coronoid process to guide and pin the shoulder.
2- Just as in Walltap, you pull the wrist of the captured arm. However, instead of pulling in the direction of 6:00 you pull and then push towards the ceiling.
It is very important to make sure that your own core doesn't block the captured wrist in its path towards the ceiling. I usually use a backwards pivot (backstep) to clear my core.
The path of the captured wrist begins towards 6:00, a pull, then shifts towards the cieling, a push similar to a shoulder press or bench press. In order to shift from pulling to pressing your grip needs to be flexible and capable of sliding.
In the beginning, your thumb is covering the ulna of his wrist and your pinky is covering the radius as you pull to 6:00. As you pull turns into a press to lift, your grip inward so that your thumb is covering the radius and your pinky is covering the ulna. This feels awkward at first, but after a few repetitions it should feel almost natural.
A little awkward is ok because the shoulder lock is very tight against the wall and you should only need a little pressure to do damage.
If you have a Badguy in Cop's Russian and he tries to bend out or curl out, you can transition into Leopardfist. However, the fingers can get tangeled in the armpit during the transition. To solve this problem, you curl your fingers and thumb into a kungfu lepardfist, thus the technique's name.
In Aikido, a technique known as Ikkyo uses basically the same principals and points of control. However, I haven't really trained enough Aikido to discuss Ikkyo in this book. PIC PIC
For Brazilian jiujitsu people, the turning motion for Leopardfist’s shoulder lock is identical to “Americana” except the position is obviously very different. PIC
Even thought the grips of the classic Chickenwing are very different than Leopardfist, the mechanics are basically the same in that it is a shoulder lock with the same key-turning motion. PIC
The real difference is that you switch your grips in that with Chickenwing it is your left hand that grip’s the Badguy’s right wrist and your right hand that control’s the Badguy’s right elbow vs Leopardfist with your right hand grabbing the Badguy’s right wrist and your left hand humerus bone/coronoid process.
Once you have a good Chickenwing against a wall, you can trap his elbow with your core and have one hand free to handcuff or do other things. PIC