What hip angle from the opponent signals the optimal timing to initiate the knee cut from headquarters?

The optimal timing is when the opponent turns their hips toward the trapped leg side, which naturally opens a passing lane across their thigh line. This hip turn creates a gap between their legs that the cutting knee can exploit. Cutting when the opponent's hips face you squarely meets maximum resistance because both legs can defend the passing lane simultaneously.

Your opponent establishes a strong frame on your shoulder as you begin the knee cut—what is your immediate adjustment?

Strip the shoulder frame by swimming your elbow inside their wrist and pinning their arm to their body, or change levels by dropping your shoulder below their frame to slip underneath it. If the frame is too strong to strip directly, consider switching to a toreando or leg drag pass that attacks the angle their frame creates rather than fighting through it directly.

What is the most critical biomechanical action that prevents the opponent from recovering half guard during the knee cut?

The hip drop is the most critical action. As the cutting knee crosses the thigh line, actively dropping your hip toward the mat on the passing side collapses all remaining space between your bodies. This prevents the opponent from re-inserting their knee because there is no gap between your hip and their body through which their leg can travel. Without the hip drop, space remains even after the knee crosses.

During the knee cut, your opponent secures a deep underhook and begins sitting up toward your back—how do you respond?

Immediately increase crossface pressure to drive their head and shoulders back to the mat, countering their upward momentum. If the crossface alone cannot flatten them, apply a whizzer on their underhook arm by overhooking it and driving your shoulder into their armpit. From the whizzer position, you can threaten a darce choke that punishes the underhook attempt or use the whizzer to flatten them and resume the knee cut.

What grip or control must be established before initiating the knee cut from headquarters?

Crossface or collar control must be established on the upper body before committing to the knee cut. The crossface forearm drives across the opponent's jaw and neck, turning their head away from the passing direction. Without this upper body control, the opponent can freely turn into the pass, establish their own underhook, and counter the knee cut with a sweep or guard recovery.

The opponent blocks your knee cut with a knee shield—what alternative passes chain naturally from this defensive reaction?

The knee shield opens three natural chain passes: the smash pass by collapsing your weight laterally onto the knee shield and using it as a passing lane, the long step pass by stepping your free leg over their shield to the opposite side, or the toreando pass by disengaging the cutting knee and redirecting laterally around their legs. Each option exploits the defensive commitment the knee shield requires.

Knee Cut from Headquarters Attacker | BJJ Technique Guide

As the attacker executing the Knee Cut from Headquarters, your objective is to convert the positional control of headquarters into a completed guard pass to side control. The technique requires precise coordination of knee pressure, crossface control, and hip movement to slice through the opponent’s defensive structure. Success depends on reading the opponent’s hip angle and committing to the cut at the optimal moment when their defensive frames are weakest, combining systematic pressure with decisive execution to complete the pass before counter-attacks develop. The knee cut rewards patience in setup and explosiveness in execution—settling into headquarters control before committing ensures you pass against the opponent’s weakest defensive angle.

From Position: Headquarters Position (Top)

Key Attacking Principles

What are the key principles for executing Knee Cut from Headquarters?

Establish upper body control before initiating the cut—crossface or underhook must be secured to prevent the opponent from turning into the pass and countering
Drive the cutting knee diagonally at forty-five degrees across the opponent’s thigh, not straight down, creating a wedge effect that mechanically separates their legs
Drop your hip weight through the cut rather than sliding over the top—the hip drop collapses defensive space and prevents half guard recovery
Read the opponent’s hip angle and initiate the cut when they turn toward the trapped leg side, which naturally opens the passing lane across their thigh
Maintain downward pressure on the trapped leg throughout the entire pass sequence to prevent the opponent from creating hip movement or recovering guard structure
Slide the shin through using a windshield-wiper extraction rather than lifting the leg, which would create space for the opponent to re-insert defensive hooks

Prerequisites

What do you need before attempting Knee Cut from Headquarters?

Headquarters position established with one opponent leg trapped and knee driven toward the mat with sustained downward pressure
Crossface or collar control secured to pin the opponent’s head away from the passing direction and prevent them from turning into you
Posting leg positioned wide for stable triangulated base that will support the weight transfer during the cutting motion
Opponent’s hip mobility restricted through combination of leg pressure and upper body control, limiting their ability to create defensive angles
Passing lane identified with opponent’s thigh line accessible on the knee cut side, ideally with their hips angled toward the trapped leg

Execution Steps

How do you execute Knee Cut from Headquarters step by step?

Establish Upper Body Control: From headquarters with the opponent’s leg trapped, secure crossface control by driving your near-side forearm across the opponent’s jaw and neck, turning their head away from you. Your far-side hand maintains control of their near-side knee or pant grip at the knee line to manage leg position and prevent early defensive framing.
Read Opponent’s Hip Angle: Observe the direction of the opponent’s hips and identify the optimal passing lane. The ideal moment to initiate the knee cut is when the opponent turns their hips toward the trapped leg side, which naturally opens a gap across their thigh line. Avoid committing when their hips face you squarely with active frames in place.
Angle the Cutting Knee: Drive your trapped-side knee diagonally across the opponent’s inner thigh at approximately forty-five degrees, aiming for the mat on the far side of their body. The angled knee creates a wedge effect that separates their legs through your bodyweight rather than muscular effort, generating pressure that is difficult to resist or redirect.
Drop Hip Weight Through the Cut: As your knee crosses the opponent’s thigh line, actively drop your hip toward the mat on the passing side. This hip drop collapses remaining space between your bodies and prevents the opponent from re-inserting their knee for half guard recovery. Your hip should become the heaviest contact point driving through their defensive structure.
Slide Shin Through and Clear the Leg: Once your knee has crossed and your hip is dropping, slide your shin across the opponent’s thigh using a windshield-wiper motion with your foot to extract your leg completely from between their legs. Maintain downward pressure throughout the extraction rather than lifting your leg, which would create space for guard recovery.
Consolidate Crossface and Block Hip: Drive your crossface arm deeper as the pass completes, pinning the opponent’s head firmly away from you with heavy shoulder pressure. Simultaneously bring your far hand to block their near-side hip, preventing them from turning into you or inserting a knee between your bodies during the transition.
Settle into Side Control: Complete the transition by establishing perpendicular chest pressure across the opponent’s torso with heavy shoulder contact. Position your legs for stable base with near leg posted and far leg sprawled, eliminate all remaining space between bodies, and secure standard side control with crossface, hip block, and chest-to-chest connection established.

Possible Outcomes

Result	Position	Probability
Success	Side Control	55%
Failure	Headquarters Position	30%
Counter	Half Guard	15%

Opponent Counters

How might your opponent counter Knee Cut from Headquarters?

Opponent establishes strong knee shield before the cut initiates, blocking the knee from crossing the thigh line (Effectiveness: High) - Your Response: Switch to smash pass by collapsing your weight laterally onto the knee shield, turning their defensive structure into a passing lane, or disengage and attack with toreando or leg drag from the opposite angle → Leads to Headquarters Position
Opponent secures deep underhook during the knee cut and begins sitting up to threaten sweep or back take (Effectiveness: High) - Your Response: Immediately drive crossface pressure harder to flatten them back down, or apply a whizzer on the underhook arm and switch to a darce choke threat that punishes their attempt to come underneath → Leads to Half Guard
Opponent frames on your hip with a stiff arm and hip escapes away, creating distance that prevents the knee from crossing (Effectiveness: Medium) - Your Response: Strip the hip frame by swimming your elbow inside their wrist and pinning it to their body, then immediately re-engage the knee cut before they can re-establish the defensive frame or recover full guard → Leads to Headquarters Position
Opponent catches your cutting leg in half guard by locking their legs around your shin as it crosses the thigh line (Effectiveness: Medium) - Your Response: Use the trapped position to settle into half guard top and begin a standard knee slice pass sequence from there, or backstep to free your leg and return to headquarters for another passing attempt → Leads to Headquarters Position

Common Attacking Mistakes

What mistakes should you avoid when executing Knee Cut from Headquarters?

1. Initiating the knee cut without establishing crossface or upper body control first

Consequence: Opponent turns into you freely, secures an underhook, and either recovers half guard or sweeps you during the cutting motion when your base is compromised
Correction: Always secure crossface or underhook control before driving the knee across the thigh line, ensuring the opponent cannot turn into the pass or establish offensive grips during the transition

2. Cutting the knee straight down vertically rather than at a diagonal angle across the thigh

Consequence: No wedge effect is created, the knee slides off the thigh without separating the legs, and the opponent easily maintains leg entanglement and recovers guard structure
Correction: Drive the knee at forty-five degrees diagonally across the opponent’s inner thigh, aiming for the mat on their far side to create the wedge that mechanically separates their legs through bodyweight

3. Failing to drop the hips during the cutting phase, staying elevated on the knee

Consequence: Space remains between your hip and the opponent’s body, allowing them to re-insert their knee for half guard recovery or create enough distance to establish defensive frames
Correction: Actively drop your hip toward the mat as the knee crosses the thigh line, making your hip the heaviest point of contact that collapses all remaining defensive space

4. Lifting the leg to clear the opponent’s entanglement instead of sliding the shin through

Consequence: Lifting creates space under your leg that the opponent exploits to re-insert hooks, recover half guard, or create enough distance to establish full guard recovery
Correction: Use a windshield-wiper shin slide to extract the leg while maintaining constant downward pressure throughout the extraction, never creating space beneath your leg

5. Telegraphing the pass direction by shifting weight toward the cutting side before committing

Consequence: Opponent anticipates the knee cut direction and pre-positions defensive frames, knee shield, or underhook that block the pass before it develops
Correction: Maintain neutral headquarters weight distribution until the moment of commitment, then execute the cut with decisive speed so the opponent must react rather than anticipate

6. Rushing the knee cut before the opponent’s hip angle opens the passing lane

Consequence: The cut meets maximum defensive resistance when the opponent’s hips face you squarely, resulting in a stalled pass that wastes energy and allows the opponent to establish stronger defensive positioning
Correction: Wait for the opponent to turn their hips toward the trapped leg side or use pressure to force the hip turn before committing to the cut, ensuring you pass against their weakest defensive angle

Training Progressions

How do you train Knee Cut from Headquarters (Attacker)?

Phase 1: Mechanics - Cutting angle, hip drop, and shin extraction Drill the knee cut motion against a non-resisting partner, focusing on the diagonal knee angle, the hip drop timing, and the windshield-wiper shin extraction. Perform 20 repetitions per side, emphasizing smooth coordination between all three elements before adding any resistance.

Phase 2: Timing and Setup - Reading hip angles and establishing upper body control Partner provides light defensive movement including hip turns and basic frames. Practice identifying the optimal moment to initiate the cut based on the opponent’s hip angle and establishing crossface control before committing. Develop the patience to wait for the right angle rather than forcing the pass.

Phase 3: Chain Passing Integration - Combining knee cut with alternative passes from headquarters Partner defends the knee cut with moderate resistance using knee shield, frames, and underhook attempts. Practice switching between knee cut, toreando, and leg drag based on defensive reactions. Build automatic recognition of which pass is available based on the opponent’s defensive choice.

Phase 4: Counter-Response Development - Handling common defensive reactions during the knee cut Partner applies specific counters including deep underhook, knee shield insertion, and hip escape sequences. Practice adjusting the knee cut in real time—increasing crossface pressure, switching to whizzer, or abandoning to alternative pass. Develop the ability to adapt mid-technique.

Phase 5: Live Application - Full resistance positional sparring from headquarters Positional sparring starting from headquarters with full resistance. Top player works to complete the knee cut or chain to alternative passes while bottom player uses all available defensive tools. Three-minute rounds with reset on pass completion or full guard recovery.

Safety Considerations

What are the safety concerns for Knee Cut from Headquarters?

The knee cut pass applies significant lateral pressure across the opponent’s knee and hip joints during the cutting phase. Controlled application is essential—sudden explosive entries can cause MCL strain or hip flexor injury in training partners. When drilling, reduce speed during the cutting phase and allow the bottom player time to adjust their leg position. Avoid driving the knee through a fully locked defensive structure with maximum force, as this can injure both the knee joint of the bottom player and the hip of the passer. Communicate with training partners about knee sensitivity and tap immediately if any joint pain is felt during the extraction phase.

Knee Cut from Headquarters Attacker

Outcomes