Knowledge

We use 2 of our limbs to control 1 of the opponent's limbs.

It is the primary defensive position for 50/50. It has 2 main functions: - Use our outside thigh as a wedge on the opponent's inside knee to prevent it from inverting and going to more dangerous positions. - Remove the exposure of our heel. We should never allow the shoe lace of our primary leg to be directly in contact with the opponent, so we put our secondary leg on top of it. From this position we should be looking forward to separate the opponent's legs and launch our own attacks.

It is a defensive position for when the opponent has managed to separate our legs. - We grip and pull on the opponent's near arm. - We place our secondary foot inside the opponent's far biceps. This position represent another defensive stage of 50/50 and should allow us to go back to 51.

It is a defensive 50/50 position where the opponent have our heel. We wedge on the opponent inside knee first with our arm and thigh and then with our whole body. We grab the opponent's collar and elbow. From this position we should be looking forward to go back to 51.

Figure-four shoulder lock with elbow bent outward.

Kata-Gatame variation from the front-headlock position.

Achilles tendon straight foot lock submission.

Head-and-arm strangle with trapped arm against neck.

Elbow extension lock between attacker’s legs.

Generic arm joint lock.