The Triangle from Back is an advanced submission setup that transitions from the harness (seat belt) back control position into a rear triangle configuration. Rather than attacking the neck directly with a rear naked choke, the practitioner threads one leg over the opponent’s shoulder and locks a figure-four triangle around the head and one arm, establishing the Rear Triangle control position. This technique exploits a common defensive pattern where the opponent strips the choking arm or tucks their chin aggressively against the rear naked choke, opening the space needed to insert the leg over the shoulder.
Strategically, the Triangle from Back is a high-level chain attack that punishes opponents who commit both hands to defending the rear naked choke. When the opponent pulls the choking arm below chin level with a two-on-one grip, their shoulder opens and the top player can swing the leg over the trapped shoulder to establish the triangle. The technique requires excellent hip dexterity and the ability to maintain back control while transitioning leg position, making it a technique that separates intermediate from advanced practitioners. Once the rear triangle is locked, the bottom player faces a severe positional disadvantage with multiple submission threats including the triangle choke squeeze, armbar on the trapped arm, and wrist locks.
The Triangle from Back serves as a critical branch in the back attack decision tree. When opponents develop strong rear naked choke defense, this option forces them to choose between defending the choke and exposing the triangle entry, creating the kind of offensive dilemma that elite back attackers rely on to finish matches.
From Position: Harness (Top) Success Rate: 55%
Possible Outcomes
| Result | Position | Probability |
|---|---|---|
| Success | Rear Triangle | 55% |
| Failure | Harness | 30% |
| Counter | Half Guard | 15% |
Attacker vs Defender
| Attacker | Defender | |
|---|---|---|
| Focus | Execute technique | Prevent or counter |
| Key Principles | Attack the triangle when the opponent commits both hands to … | Keep shoulders tight and chin tucked to deny the gap above t… |
| Options | 8 execution steps | 4 defensive options |
Playing as Attacker
Key Principles
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Attack the triangle when the opponent commits both hands to defending the choking arm, creating the shoulder opening needed for leg insertion
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Maintain chest-to-back connection throughout the transition to prevent the opponent from turning and escaping during the leg switch
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Use the non-choking arm to control the opponent’s far wrist or bicep, preventing them from blocking the incoming leg
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Thread the leg over the shoulder in a smooth arc, keeping the knee tight to the opponent’s neck to prevent them from ducking under
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Lock the figure-four triangle configuration immediately after the leg clears the shoulder, before the opponent can posture or strip the leg
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Keep hooks active during the transition phase to prevent the opponent from spinning out or creating distance while the leg is being threaded
Execution Steps
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Threaten the choke: From harness position with seat belt grip established, begin working the choking arm toward the neck…
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Read the defensive reaction: Recognize when the opponent pulls your choking arm down with a strong two-on-one grip, tucking their…
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Control the far arm: Release the underhook arm from the harness and use it to control the opponent’s far-side wrist or bi…
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Withdraw the choking-side hook: Remove the hook on the same side as your choking arm by pulling your foot out from inside their thig…
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Thread the leg over the shoulder: Swing the freed leg in an arc over the opponent’s shoulder on the choking arm side. The back of your…
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Capture the head and arm: Once the leg is over the shoulder, angle the knee downward to trap their head and one arm inside the…
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Lock the figure-four: Bring your other leg up and hook the ankle of your top leg behind the knee of the bottom leg to esta…
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Consolidate Rear Triangle control: Once the figure-four is locked, adjust your hip angle to maximize choking pressure. Pull the opponen…
Common Mistakes
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Releasing chest-to-back connection while threading the leg, creating space between bodies
- Consequence: Opponent escapes back control entirely by turning into guard or standing up during the momentary gap in control
- Correction: Maintain constant chest pressure throughout the transition by keeping hips close and using the remaining hook to anchor your lower body to the opponent
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Attempting the triangle without first forcing the opponent to commit both hands to choke defense
- Consequence: Opponent uses their free hand to block the incoming leg or to strip the hook, preventing the triangle from being established
- Correction: Always threaten the rear naked choke first and wait for the two-on-one defensive reaction before initiating the leg thread
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Threading the leg too slowly or hesitating mid-arc over the shoulder
- Consequence: Opponent catches the leg during transition, strips it, and may escape to turtle or half guard while you have compromised hook control
- Correction: Commit to the leg thread as a single fluid motion once initiated. Practice the arc repeatedly in drilling to build the speed and confidence needed
Playing as Defender
Key Principles
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Keep shoulders tight and chin tucked to deny the gap above the shoulder that the attacker needs to thread the leg through
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Avoid committing both hands fully to choke defense simultaneously, as this creates the exact opening the triangle entry requires
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Monitor the attacker’s hip movement and hook withdrawal with tactile awareness, as these are the earliest indicators of the triangle attempt
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When the attacker withdraws a hook to begin the leg thread, immediately turn toward the opening to disrupt the transition and recover guard
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If the leg clears the shoulder, fight the figure-four lock aggressively before it tightens by controlling the attacker’s ankle and pushing the leg off your shoulder
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Maintain at least one hand near your shoulder line rather than both hands low on the choking arm, creating a ready block against the incoming leg
Recognition Cues
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Attacker removes one hook from your thigh while maintaining the harness grip, indicating they are loading the leg for the over-shoulder thread
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You feel the attacker’s hips shift laterally away from one side, creating the clearance needed to swing the leg in an arc over your shoulder
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The attacker’s underhook arm releases from the harness and moves to control your far-side wrist or bicep, pinning your arm to prevent you from blocking the incoming leg
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Increased upward pressure from the choking arm as the attacker uses it as a frame reference while repositioning their leg, combined with a change in their breathing rhythm indicating effort
Defensive Options
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Shoulder shrug and chin tuck defense - raise the shoulder on the threading side while tucking your chin tight, closing the gap the leg needs to clear - When: At the earliest recognition that the attacker is withdrawing a hook and beginning the leg threading motion, before the leg reaches the shoulder
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Turn into the opening - when you feel the hook withdraw, immediately hip escape and turn your body toward the side where the hook was removed to face the attacker - When: During the transition window when one hook is removed and the attacker has reduced lower body control, before the leg begins its arc over the shoulder
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Ankle strip and leg push - grab the attacker’s threading leg at the ankle or shin as it comes over the shoulder and push it back over before the figure-four locks - When: When the leg has already cleared the shoulder but the figure-four has not yet been locked, during the 2-3 second window before the triangle consolidates
Position Integration
The Triangle from Back occupies a critical branch point in the back attack decision tree. It functions as the secondary threat that makes the rear naked choke more dangerous by punishing opponents who over-commit to choke defense. Within the modern back attack system, the sequence flows: establish harness, threaten rear naked choke, read opponent’s defensive commitment, and branch to triangle entry when both hands defend the choke. The resulting Rear Triangle position offers its own submission tree including triangle squeeze, armbar on the trapped arm, and wrist locks. This creates a multi-layered attack system where each defense opens the next threat, embodying the dilemma-based approach that defines elite back control play. The technique connects the harness position to the triangle control family, bridging two major subsystems of the BJJ knowledge graph.