Defending the Rear Naked Choke from Harness requires immediate threat recognition and systematic hand fighting to prevent the choking arm from crossing the neck. The defender faces the most dangerous submission in Brazilian Jiu-Jitsu from the most disadvantageous positional configuration, where the attacker has both structural control through the seatbelt grip and direct proximity to the neck. Success depends entirely on addressing the choke threat before it fully materializes through proactive two-on-one grip fighting on the choking arm, consistent chin protection and shoulder shrugging, and precisely timed escape attempts during the attacker’s grip transition windows when the seatbelt clasp is temporarily broken.
Opponent’s Starting Position: Harness (Top)
How to Recognize This Attack
- Attacker’s over-shoulder arm begins to release from the seatbelt clasp and slide laterally across your neck toward the far carotid artery
- Attacker’s support hand shifts from the seatbelt grip to control or redirect your defensive wrist, clearing a path for the choking arm
- Chest pressure increases noticeably as the attacker drives forward to prevent you from creating separation during the grip transition phase
- Attacker adjusts hook depth, switches to body triangle, or increases lower body tension to stabilize their base before committing to the neck attack
- Attacker’s head moves to the underhook side of your body, positioning for the optimal squeeze angle behind your shoulder
Key Defensive Principles
- Prioritize controlling the choking arm with a two-on-one grip before it crosses your centerline - once the figure-four is locked behind your head, defensive options decrease dramatically
- Tuck your chin firmly to your chest and raise the shoulder on the choking side to create a physical barrier against the forearm slide across the throat
- Fight the hands continuously and aggressively - never allow the attacker to establish an uncontested figure-four grip behind your head
- Create angles by turning toward the underhook side to disrupt the attacker’s chest-to-back alignment and open escape pathways
- Address the choke threat completely before attempting any positional escapes - surviving the submission always takes priority over improving position
- Use controlled and methodical defensive movements rather than panicked explosive reactions that burn energy and create defensive openings
Defensive Options
1. Establish two-on-one grip on the choking arm wrist and forearm, pulling it below chin level toward your chest
- When to use: Immediately when the choking arm begins to slide across the neck or as a preemptive defense when you feel the seatbelt shift
- Targets: Harness
- If successful: Prevents the choke from being completed and returns the exchange to a grip-fighting battle from harness position
- Risk: Both hands committed to choking arm defense leaves hooks undefended and may allow deeper positional control
2. Chin tuck with shoulder shrug creating a physical barrier against the forearm slide
- When to use: During the early stages of the arm slide before the figure-four grip is locked behind the head
- Targets: Harness
- If successful: Creates a physical barrier that prevents the forearm from reaching the proper choking position across both carotid arteries
- Risk: Only delays the choke rather than resolving the positional problem. Attacker can use jaw pressure to force chin up.
3. Hip escape and turn toward underhook side during the attacker’s grip transition window
- When to use: During the moment when the attacker releases the seatbelt clasp to advance the choking arm, creating a brief gap in two-handed control
- Targets: Half Guard
- If successful: Escapes back control entirely by turning to face the attacker and establishing half guard position
- Risk: If timed poorly, the turn exposes the neck during rotation and may accelerate the choke completion
4. Peel the figure-four grip by grabbing the choking wrist and rotating body toward the choking arm side
- When to use: After the attacker has locked the figure-four configuration but before full squeezing pressure is applied
- Targets: Harness
- If successful: Breaks the choking configuration and forces the attacker to re-establish the entire grip sequence from the seatbelt position
- Risk: Requires significant grip strength and precise timing. Failure to break the grip means the choke is fully locked with both your hands trapped.
Best-Case Outcomes for Defender
→ Half Guard
Time the hip escape during the attacker’s grip transition when the seatbelt clasp is temporarily broken. Turn toward the underhook side while using both hands to control the choking arm, sliding hips away from the hooks and completing the full turn to establish half guard with the attacker’s leg trapped between yours.
→ Harness
Successfully defend the choke by maintaining persistent two-on-one grip control on the choking arm, preventing it from ever crossing the centerline of the neck. While remaining in harness bottom is not ideal, neutralizing the immediate submission threat gives you time to work systematic positional escapes from the harness position.
Test Your Knowledge
Q1: What is your first defensive priority when you feel the choking arm begin to slide across your neck? A: Immediately establish a two-on-one grip on the choking arm’s wrist and forearm with both hands, pulling it down below your chin line toward your chest. Simultaneously tuck your chin tightly to your chest and raise the shoulder on the choking side to create a physical barrier. The choke cannot be completed if the forearm cannot cross your centerline and reach the opposite carotid artery. Everything else is secondary to preventing the choking structure from being locked.
Q2: When is the optimal escape window during the RNC attempt from Harness? A: The best escape window occurs during the attacker’s grip transition when they release the seatbelt clasp to advance the choking arm. At this moment, the two-handed connection securing the harness is temporarily broken, creating a brief opportunity to turn and escape before the new choking grip is established. The second window occurs if you successfully strip the figure-four grip, as the attacker must re-establish their entire choking configuration from scratch.
Q3: How do you defend against jaw pressure when your chin is aggressively tucked? A: When the attacker applies forearm pressure across the jawline, resist the urge to lift your chin. Instead, turn your head slightly toward the crook of the attacker’s elbow while maintaining chin-to-chest pressure, which reduces the lever arm of the jaw crush. Use both hands to pull the forearm lower, redirecting pressure away from the mandible. If the jaw pressure becomes unbearable, it is safer to attempt a positional escape by turning toward the underhook side than to lift your chin and expose the throat.
Q4: Your opponent has the figure-four locked behind your head but has not applied full squeezing pressure yet - what is your escape sequence? A: With the figure-four locked, use both hands to grab the choking wrist and pull it below your chin while rotating your body toward the choking arm side to reduce the compression angle. Simultaneously work to strip one hook by driving your same-side foot against the attacker’s instep. If you break the grip, immediately turn toward the underhook side and hip escape aggressively to create distance. If the grip cannot be broken within several seconds, you must tap rather than risk unconsciousness, as the position is extremely dangerous once the figure-four is fully locked and pressure begins.