What is the primary control point that must be established first during deep half entry?

The deep underhook on the opponent's near leg is the primary control that must be established first. Your shoulder should be positioned against the inside of their thigh with your hand gripping behind their knee or reaching toward their far hip. This underhook serves as the anchor point for the entire rotation and provides the foundational control necessary to complete the entry safely.

Why is proper head position critical during deep half entry, and where should your head be positioned?

Proper head position is critical because it prevents the opponent from applying shoulder pressure that could flatten you out and shut down the entry. Your head should be positioned below the line of the opponent's hips, with your face looking toward their far hip rather than up at their chest. This low head position removes the angle they need to apply downward pressure and allows you to complete the rotation underneath their center of gravity.

Your opponent posts their hand on the mat and begins to limp leg backward out of your underhook - how do you adjust?

Immediately follow the retreating leg by scooting your hips forward to maintain connection. If you can re-secure the underhook, pull the leg tight and continue with the entry. If the leg is fully extracted, do not remain flat on your back. Transition to single leg X guard by hooking their remaining leg with your feet, or sit up aggressively to pursue a single leg takedown on the retreating leg. The key is recognizing the counter within the first second and transitioning rather than fighting to save a lost position.

What is the most critical hip movement in the deep half entry sequence?

The most critical hip movement is the initial shrimp/hip escape that creates the 2-3 inches of space needed to begin rotation. Without this space creation, the entire entry is impossible because your opponent's chest pressure pins you flat. The hip escape must be performed while maintaining frame contact with your top arm. The secondary critical hip movement is the rotation itself, where your hips swing away from your opponent as your upper body threads underneath them, creating the perpendicular T-shape body alignment.

What grip requirements must be met before you commit to the full rotation into deep half?

Before committing to rotation, you must have secured a deep underhook on opponent's near leg with your bottom arm, with your shoulder wedged against the inside of their thigh and your hand reaching at minimum behind their knee. Your top arm must be free and actively framing against their shoulder or hip to manage distance during rotation. No grips on opponent's upper body are needed for the entry itself, but the underhook depth is absolutely non-negotiable. A shallow underhook that only reaches their knee will fail against any sprawl counter.

What is the optimal timing window for initiating the deep half entry?

The optimal timing window is when your opponent commits their weight forward, either by driving pressure into your half guard or by reaching forward for a grip. When their weight shifts forward, their near leg becomes loaded and difficult to retract quickly, making the underhook easier to secure and the limp leg counter harder to execute. Conversely, attempting the entry when your opponent is sitting back on their heels or in a posting base makes the underhook shallow and easily defeated by sprawling.

Deep Half Entry Attacker | BJJ Technique Guide

The Deep Half Entry from the attacker’s perspective is about converting a defensive half guard bottom position into an offensive deep half guard platform. As the attacker, your objective is to thread your body underneath your opponent’s center of gravity, establishing a deep underhook on their near leg and positioning your head below their hip line. This creates a fulcrum-based leverage system where your opponent’s own weight becomes the engine for your sweeps. The entry demands precise sequencing: frame to create space, secure the underhook, rotate underneath, establish head position, hook the far leg. Each step builds on the previous one, and skipping steps leads to failed entries or counters. Mastering the timing of when to initiate the entry is equally important as the mechanics themselves, with the ideal window occurring when your opponent commits forward pressure.

From Position: Half Guard (Bottom)

Key Attacking Principles

What are the key principles for executing Deep Half Entry?

Create space and angle with hip escape before initiating entry - never attempt the rotation while pinned flat
Secure underhook on opponent’s near leg as the foundational control before committing to the rotation
Keep head positioned below opponent’s hip line to prevent shoulder pressure from shutting down the entry
Maintain active frame with top arm to control distance and prevent crossface during the initial phase
Use bottom leg to hook opponent’s far leg for two-point structural control once rotation is complete
Generate constant movement after establishing position to prevent opponent from settling their base
Protect against the limp leg counter by securing deep underhook control early and pulling the leg tight to your chest

Prerequisites

What do you need before attempting Deep Half Entry?

Half guard bottom position established with inside leg controlling opponent’s leg at or below the knee
Opponent applying forward pressure or attempting to flatten you, providing the weight commitment you need
Ability to create minimal space through shrimping or framing with at least 2-3 inches of separation
Underhook on near side already secured or immediately available as opponent drives forward
Top arm free to create defensive frame against crossface attempts during initial space creation
Hip mobility sufficient to rotate underneath opponent’s center of gravity through the full entry arc
Understanding of opponent’s base and weight distribution to time the entry correctly

Execution Steps

How do you execute Deep Half Entry step by step?

Create initial space: From half guard bottom, use your top arm to create a strong frame against opponent’s shoulder or hip. Simultaneously perform a small shrimp/hip escape to create just enough space to begin rotating your body. Your goal is to create 2-3 inches of space between your torso and opponent’s chest. This is a small, precise movement rather than a large explosive shrimp.
Secure underhook on near leg: As you create space, slide your bottom arm (the arm closest to the mat) underneath opponent’s near leg, securing a deep underhook around their thigh. Your shoulder should be positioned against the inside of their thigh, with your hand gripping behind their knee or reaching toward their far hip. This underhook is the foundational control for the entire position and must be deep before you commit to rotation.
Begin rotation underneath: Using the underhook as an anchor point, begin rotating your entire body perpendicular to your opponent. Turn onto your side and continue rotating so that your back begins to face the mat. Your head should start moving toward a position underneath opponent’s hips, while your hips rotate away from them. Think of creating a T-shape with your bodies, using the underhook as the pivot point.
Establish head position below hip line: Continue rotating until your head is positioned underneath opponent’s hips, with your face looking toward their far hip. Your head must be below the line of their hips to prevent them from applying shoulder pressure downward. Keep your neck protected by maintaining good posture and not allowing your chin to be exposed. This head position is the critical mechanical detail that makes the position defensible.
Hook far leg for second control point: As you complete the rotation, use your bottom leg to hook around opponent’s far leg. Your foot should hook behind their knee or around their thigh, creating a second point of control beyond the underhook. This hook prevents them from stepping over your body to escape and also establishes the mechanical structure necessary for sweep initiation.
Pull underhook tight and adjust body position: Tighten your underhook by pulling opponent’s near leg close to your chest, eliminating any slack. Adjust your body so you are fully underneath their base with your weight on your upper back and shoulders. Your near arm maintains the deep underhook, your bottom leg hooks their far leg, and your top arm is free to control their far hip or belt.
Initiate immediate sweep threat: Do not settle into a static deep half position. Immediately begin loading a sweep by elevating your hips or reaching for their belt or far pant leg with your free hand. This forces your opponent to react defensively to the sweep threat rather than methodically working to extract their leg and pass. The waiter sweep and old school sweep are your primary initial options depending on their weight distribution.

Possible Outcomes

Result	Position	Probability
Success	Deep Half Guard	60%
Failure	Half Guard	25%
Counter	Half Guard	15%

Opponent Counters

How might your opponent counter Deep Half Entry?

Opponent sprawls back and limp legs out of underhook (Effectiveness: High) - Your Response: Immediately follow the retreating leg by scooting your hips forward and re-securing the underhook. If the leg is fully extracted, transition to single leg X guard by hooking their leg with your feet, or sit up to pursue a single leg takedown on the retreating leg. → Leads to Half Guard
Opponent applies heavy crossface and shoulder pressure to prevent rotation (Effectiveness: High) - Your Response: Create stronger frame with top arm against their shoulder or bicep. If crossface is established before you begin rotating, abandon deep half entry and work back to knee shield half guard or use the pressure to transition into lockdown to control their posture before reattempting. → Leads to Half Guard
Opponent bases out wide with far leg and circles away from your underhook (Effectiveness: Medium) - Your Response: Follow their movement by scooting your hips and maintaining underhook control. If they create too much distance, release and transition to butterfly guard by inserting a hook, or pursue single leg X guard on their near leg as they back away. → Leads to Half Guard
Opponent drops weight and flattens you before entry completion, driving chest-to-chest (Effectiveness: Medium) - Your Response: Use lockdown on their trapped leg to prevent them from advancing position and to break their posture down. From lockdown, work back to creating space by whipping their leg to off-balance them, then reattempt the deep half entry or transition to electric chair. → Leads to Half Guard

Common Attacking Mistakes

What mistakes should you avoid when executing Deep Half Entry?

1. Attempting to enter deep half without creating initial space first

Consequence: Opponent’s chest pressure pins you flat, preventing rotation and leaving you vulnerable to crossface and pass progression to side control
Correction: Always establish frame and create at least minimal space before attempting to rotate underneath. Even 2-3 inches of separation is sufficient to begin the rotation.

2. Failing to secure deep underhook on opponent’s near leg before committing to rotation

Consequence: Without proper underhook depth, opponent can easily sprawl back and remove their leg from your control, leaving you flat on your back with no guard structure
Correction: Ensure your shoulder is against the inside of their thigh and your hand reaches behind their knee or toward their far hip before beginning the rotation. The underhook depth is non-negotiable.

3. Keeping head too high during entry instead of below opponent’s hip line

Consequence: Opponent can apply shoulder pressure downward onto your face and chest, flattening you out and preventing the completion of the entry
Correction: Rotate your head below the line of opponent’s hips. Your face should be looking toward their far hip, not up at their chest. Think of ducking under a low doorway.

4. Neglecting to hook opponent’s far leg with bottom leg after completing rotation

Consequence: Opponent can easily step over your body, base out wide to neutralize your sweep angles, or circle away from your underhook control
Correction: As soon as your rotation brings you into range, hook their far leg behind the knee with your bottom leg to establish two-point control. This should happen within one second of completing the rotation.

5. Remaining static after achieving deep half position without threatening sweeps

Consequence: Opponent has time to establish strong base, secure crossface control, and methodically work to extract their leg and pass your guard
Correction: Deep half is a dynamic attacking position. Immediately begin loading a sweep attempt, whether waiter sweep, old school, or back take. Force your opponent to defend rather than attack.

6. Crossing ankles or locking legs prematurely during the entry

Consequence: Reduces hip mobility and makes it difficult to adjust position, change sweep angles, or transition to different sweep variations based on opponent reactions
Correction: Keep legs active and independent until you commit to a specific sweep. Maintain flexibility to adapt to opponent’s reactions by keeping your feet free to adjust hook placement.

Training Progressions

How do you train Deep Half Entry (Attacker)?

Week 1-2: Entry Mechanics - Isolated movement drilling without resistance Practice the rotation and underhook mechanics from half guard with a cooperative partner. Focus on proper head position, smooth rotation, and establishing the far leg hook. Drill 20-30 repetitions per side at the beginning of each training session. Emphasize the frame-underhook-rotate-hook sequence.

Week 3-4: Timing Development - Recognizing entry opportunities against light pressure Partner applies 30% pressure in half guard while you identify windows to enter deep half. Practice reading opponent’s weight distribution and timing your entry when they commit pressure forward. Begin chaining entry with basic waiter sweep to build the complete attack sequence.

Week 5-8: Counter Recognition - Defending common counters and maintaining position Partner uses specific counters (limp leg, crossface, sprawl) at 50% intensity. Practice your responses to each counter and work on maintaining deep half position even when opponent attempts to escape. Include sweep attempts from secured deep half position.

Week 9-12: Integration and Combinations - Combining deep half entry with sweep system Flow drill between half guard, deep half entry, and various sweep options (waiter, old school, electric chair, back take). Partner provides realistic resistance at 70% intensity. Work on reading opponent’s defenses and selecting appropriate sweep based on their reactions.

Month 4-6: Competition Application - Live implementation with full resistance Use deep half entry during regular positional sparring and live rolling. Focus on high-percentage entries from realistic half guard situations. Track success rate and identify specific opponent body types and passing styles where entry works best for your game.

Safety Considerations

What are the safety concerns for Deep Half Entry?

Deep half entry is generally a low-risk technique when practiced with proper progression and control. The primary safety considerations include protecting your neck during rotation by maintaining good posture and not allowing your head to be pushed into dangerous angles. Beginners should avoid forcing the entry against heavy resistance until they have developed proper mechanics, as this can result in neck strain. When drilling, partners should apply gradual resistance rather than explosive movements to allow the practitioner to develop timing safely. Pay particular attention to your bottom shoulder during the rotation: ensure you are rotating on your shoulder blade rather than the tip of the shoulder to avoid joint stress. During live training, if you find yourself stuck mid-rotation with opponent applying heavy pressure, do not continue forcing the movement. Instead, work back to half guard or accept the positional disadvantage and focus on guard recovery. Practitioners with shoulder injuries should consult with their instructor before drilling deep half entries extensively, as the rotation places significant load through the bottom shoulder.

Deep Half Entry Attacker

Outcomes