ARM TRIANGLE FROM SIDE CONTROL

The arm triangle from side control is the canonical variation of the kata-gatame blood choke applied from the side-control position. The technique uses the opponent's own arm pressed against one side of the neck while the attacker's arm presses against the other side, producing scissor-style carotid compression. The technique is one of the most-taught side-control submissions and pairs alongside the spinning armbar and far-side kimura as the canonical side-control finishes.

The mechanics begin from established side control with the opponent's near arm available for capture. The attacker pushes the opponent's near arm across the opponent's own neck — the 'push to the neck' phase that establishes the initial geometry. The attacker then traps the arm against the carotid by establishing head pressure on the opposite side of the opponent's neck. The attacker's other arm threads under the opponent's head, gripping the attacker's own bicep in a tight clasp. The finish comes from squeezing the elbows together while transitioning to north-south or staying in modified side-control to drop body weight forward — the combined pressure produces the carotid compression.

The arm triangle from side control is foundational pedagogically. Notable practitioners include virtually every elite side-control specialist. The technique can finish from side-control directly, or the attacker can transition to mount or north-south for additional finishing leverage. Defensively the arm triangle from side control is escaped by maintaining strict arm-position control before the push-to-neck phase, by tucking the chin and rotating the head laterally, or by bridging laterally to disrupt the chest pressure.