Reverse Triangle Escape — No-Gi Grappling

What This Is

The reverse triangle — gyaku sankaku — is the inverted-orientation triangle. For the attack, see Reverse Triangle. The attacker’s outside leg swings over your shoulder while their inside leg tucks underneath, and the figure-four closes around your head and one arm. ⚠ The compression is not their leg on your throat: it is your own trapped shoulder driven across one carotid, with their legs closing the other side. That is what the defence has to undo, and it is why recovering the arm collapses the lock more reliably than fighting the legs.

It exists because it arrives from places a front triangle cannot. It is a counter taken from underneath — the attacker is in an inferior position and you are the one holding a pin — which is exactly why it lands: a top player concentrating on holding side control drops their head into range and the legs come up over the shoulder line before the position reads as dangerous.

★ Its home is bottom side control, which is the position both of the sources behind the attack page name — one of them calls it the easiest place to learn the technique. So this page is written for the problem you will actually meet: you are on top, holding a pin, and the person underneath is attacking. That inverts the usual reading of an escape page, and it is the single most useful thing to know about defending this.

Also Known As

Also known as

Gyaku sankaku defence
Inverted triangle escape

Safety First

Reverse Triangle (Defence) is an elevated risk technique. A bilateral vascular strangle, the same class as any other triangle. One carotid is closed by the defender's own trapped shoulder pressed across it; the other by the attacker's legs. ⚠ What is unusual is not the mechanism but the orientation: the attacker is underneath and inverted, so the defender is the one holding a dominant position and is least expecting a finish. Serious injury can occur Seconds once both surfaces close, as with any bilateral carotid compression. The fade is the signal..

If you are new to this technique: read this section before anything else. Understanding the danger is part of understanding the technique.

Tap early — before pain, not because of it.
The person applying the technique is responsible for releasing immediately.
Communicate before drilling. Know your partner's experience level with this position.
Do not train this technique while fatigued or in live rolling without established mat culture.

Tapping culture and why it matters → Injury guide for this technique →

⚠ Tap on the fade, as you would against any blood choke. ★ The specific hazard here is psychological rather than mechanical: you are on top and winning, which is the state in which people ride submissions they should not. A triangle that closes while you are holding a pin is exactly as fast as one that closes from guard.

Defence Timing

You are on top, most likely in side control. The stages are the attacker’s legs arriving, and the whole thing is short because you did not see it starting.

Before the legs move — your arm is in the space

The precondition is an arm of yours left between or near their legs, and a head that has dropped toward their centreline while you concentrate on the pin. This is where the technique is prevented rather than escaped, and it costs nothing: keep the head up, keep the arm out of the space, and the legs have nothing to close on.

The outside leg swinging over the shoulder

The first visible sign, and it is late. Drive your head away from their centreline and pull the threatened arm back toward your own body immediately — the arm is the thing being collected, and it is easier to withdraw now than at any point afterwards.

The figure-four closing

The inside leg tucks and the lock closes around your head and arm. ⚠ Your own shoulder is now one of the two compression surfaces. This is the stage that decides the exchange and the one where the right target is counter-intuitive: the arm, not the legs.

The angle taken

They rotate to finish and both surfaces load. Turn into them if you have anything left, and otherwise tap. A closed and angled triangle finishes as fast from underneath as from guard, and being on top does not buy time.

The Invariant in Action

This is the whole page in one sentence: you are supplying half the choke, so take your half back. Defenders who reach for the legs are contesting the attacker’s contribution and leaving their own in place.

Which is why the cheapest defence on this page is a habit about where your arms live while you hold a pin, not a technique.

"Escape mechanics require creating space before moving through it. A pinned or controlled player cannot move into space that does not exist. Every escape sequence has two stages: the creation of space (the frame, the bridge, the push) and the movement through it (the shrimp, the hip escape, the re-engagement). Reversing the order fails."

Why it works here

The space this escape needs is space for the elbow to travel back to your body, and it exists before the figure-four closes rather than after. A defender who waits for the lock and then tries to extract is pulling an arm against a closed leg triangle. Turning into the attacker late does create space, but it creates it by shortening their lever rather than by freeing anything, which is why it is a survival move rather than an escape.

See full invariant page →

The order is the arm, then the position. Reversed — position first, arm afterwards — the arm is still supplying a carotid while you work.

Named Escape Techniques

1. Keep the Arm Out of the Space

When it works Always, and it costs nothing. A habit rather than a technique.

While holding side control, keep both arms out of the channel between the opponent’s legs and their body.
Keep your head up and off their centreline. A head that drops toward the middle while you settle your weight is the invitation.
If an arm has to go in — to pass, to clear a frame — take it back out rather than leaving it there while you work on something else.
Treat a bottom player whose hips are turning toward you as someone setting this up, not someone escaping.

Why it fails Concentrating on the pin. ★ The defender is winning at the moment this is being set up, which is why the habit has to be automatic — nobody watches for a submission while consolidating a dominant position.

Ability level: Developing

2. Withdraw the Arm Before the Lock Closes

When it works As the outside leg swings over the shoulder. Short window, and the only cheap escape.

Pull the threatened elbow back toward your own ribs along the shortest line. Do not reach across your body or push against the leg.
Drive your head away from their centreline at the same time — the head and the arm leave together or neither does.
Post the free hand on their hip to stop them following you as the arm comes clear.
Re-establish the pin from a wider base, with the head high.

Why it fails Reaching for the leg with the free hand. It is the visible threat and the wrong target: the leg is the half of the choke the attacker controls, and the seconds spent there are the seconds the figure-four needs.

Ability level: Proficient

3. Recover the Arm Against a Closed Lock

When it works Figure-four closed, angle not yet taken. Hard, and still the right target.

Stop working on the legs entirely. A closed figure-four does not open for a defender lying across it.
Bring the trapped hand to your own chest or belt line and clamp the elbow in, exactly as you would defend a kimura.
Shrug the trapped shoulder up toward your ear. ⚠ That shoulder is a compression surface — lifting it off your own neck reduces the choke even before the arm comes out.
Turn into the attacker as the shoulder clears, which shortens the lever their legs are closing across.

Why it fails Turning away from the attacker, which is the instinct and which feeds your own shoulder further into your neck. If the shoulder cannot be shrugged clear and the angle is being taken, tap.

Ability level: Proficient

What Causes Escapes to Fail

Fighting the legs

★ The defining error, and it follows from a wrong model of the choke. The legs are one surface; your own trapped shoulder is the other, and it is the one you can remove. Every second spent prying at the figure-four is a second the arm stays where it is.

Riding it because you are on top

⚠ Being in the dominant position makes a finish feel unlikely, and the strangle does not know that. This closes as fast as a guard triangle and the fade arrives on the same schedule.

Turning away from the attacker

The instinct under pressure is to turn away from it. Here that rotates your own shoulder further across your own carotid, which tightens the half of the choke you are supplying.

Running standard triangle defence

Posture and stack are the answers to a guard triangle, and neither exists here — you are already on top and the attacker is already underneath, so there is nothing to stand up out of and nothing to stack. A defender running those answers is defending a different submission.

Counter-Offensive Options

An attacker who commits both legs to this from underneath has given up their guard and their hips to do it.

If the arm comes free during the swing, their legs are high and their hips are turned away from you — a straightforward route to pass to the far side while the legs are out of position, or to take the back if they have rotated far enough. If the attempt fails outright, they are flat underneath you with their legs unable to reframe, which is a better pin than the one you started with.

The general shape: it is an expensive attack from a bad position, so surviving it usually means facing someone who has spent everything they had.

Drilling Notes

Arm discipline under a live pin. Partner starts in bottom side control and attacks the moment an arm enters the space. Defender holds the pin and works passes without ever leaving an arm in. Score by whether the legs ever get to swing, not by whether anything is escaped.
Arm, not legs. Partner closes the figure-four; the defender must go to their own trapped elbow first, every rep. ★ Any rep where the free hand touches the leg first counts as a failure regardless of outcome — this is the habit the page exists to build.
Shrug the surface off. From a closed lock, the defender shrugs the trapped shoulder toward the ear and reports whether the pressure drops. Trains the mechanism rather than the escape, so the reason for going to the arm becomes obvious.

Ability Level Guidance

Developing

Learn where your arms live while you hold a pin. That habit prevents this and several other bottom-side attacks, and it is worth more than any escape on this page.

Proficient

Learn that your own shoulder is half the choke, and that the arm is therefore the target. Add the withdrawal on the leg swing, and calibrate the tap normally — being on top is not extra time.

Advanced

Read the setup rather than the attack. A bottom player turning their hips toward you while you hold side control is building this, and answering it at that moment is a pass rather than an escape.