Purpose

The D’Arce choke (arm-in guillotine) is entered when the opponent’s near arm is extended or trapped during front headlock control — the arm is inside the choking loop, increasing the mechanical efficiency of the choke compared to a standard guillotine. The arm thread is more complex than the standard guillotine entry: the choking arm must pass under the shoulder, not just across the throat, and the shoulder must be trapped inside the arm loop.

The difficulty is threading under a structure (the shoulder girdle) rather than across an open surface (the front of the throat). Students who attempt to thread too high get the loop around the neck only. Students who thread too low — at chest level — cannot close the loop back to the neck. The correct path is exactly at the shoulder crease: under the armpit and up through to the throat.

Setup

Front headlock is established. The bottom player is turtled with their near arm (the arm closest to the top player’s threading side) extended slightly outward — not tucked. This represents a moment when the opponent’s arm is available. The top player stands ready with the encirclement grip.

Execution

From the front headlock, release the hand connection. Identify the near shoulder on the threading side.
Drop the chin-arm’s elbow toward the mat and simultaneously drive the hand and forearm under the bottom player’s near armpit — threading between the arm and the torso. The forearm moves forward and upward through the channel created by the shoulder joint and the ribcage.
As the forearm passes through the shoulder crease, rotate the palm upward. The forearm should now be sitting inside the shoulder — between the shoulder and the neck — with the hand reaching past the far side of the throat.
Bring the far (free) hand to connect with the threading hand on the far side of the throat. The standard connection for D’Arce is a wrist-over-wrist or palm-over-palm grip, with the threading arm’s bicep driving against the side of the throat and the near shoulder trapped inside the arm loop.
Verify the shoulder is inside the arm loop — the arm passes under the shoulder, not over it. The near shoulder should be visibly inside the loop formed by the threading arm and the torso.
Release and reset.

Safety note: No squeeze is applied at any point. Verify the position geometry only. The D’Arce can cause rapid unconsciousness — this drill is position-only.

Coaching Notes

The critical check is shoulder inside versus shoulder outside the loop. Many students thread the arm over the shoulder rather than under it — they end up with a standard guillotine from a slightly different entry angle, with no arm trapped. Ask the student to look at where the shoulder joint is relative to their threading arm: it must be inside, not outside.

The thread path is a diagonal — the arm goes forward and upward, not straight across. Students who drive straight across end up at sternum level rather than at the throat. Cue: “Aim for their opposite ear, not their opposite shoulder.”

The palm-up rotation during threading is what allows the forearm to seat correctly against the side of the throat. If the palm faces down during threading, the forearm’s outside edge (bony) rather than the inside surface (soft) contacts the throat — less effective and harder to hold.

Common Errors

Shoulder outside the loop: The arm has threaded over rather than under the shoulder. Re-thread under the armpit — the shoulder must be trapped inside the arm loop.

Thread at chest level: The forearm is too low — at the ribcage rather than the shoulder. The loop closes around the chest, not the throat. Thread higher, into the shoulder crease.

Palm facing down during thread: The bony edge of the forearm contacts the throat. Rotate palm upward as the forearm seats into position.

Grip closed before shoulder is confirmed inside: Students rush to close the grip before verifying the thread. Check shoulder position before connecting the hands.