Why must you collapse the opponent's elbow before threading the figure-four?

A straight arm slides out of the shoulder lock because there is no bend to bind the joint, so the opponent simply extracts the limb. Collapsing the elbow toward your chest shortens the lever, isolates the shoulder, and creates the folded structure the figure-four needs to control shoulder rotation and pose a genuine submission threat.

How does the opponent's own action create the entry into Williams Guard from butterfly?

The entry relies on the opponent committing their arm forward. When they reach to grip your collar, post a hand on the mat to defend a sweep, or drive forward to pressure your butterfly guard, they feed that arm directly into your overhook range. Letting these reactions deliver the arm is higher percentage than forcing the lock on a defended, retracted limb.

What should you do if the opponent rips their arm out before you finish the figure-four?

Do not chase the escaping arm, as over-extending exposes you to a pass. Instead re-pommel for the overhook or switch to a same-side underhook, reset your butterfly hooks and frames, and retain butterfly guard. The failure outcome should always return you to a safe guard rather than a scramble that concedes top position.

Why do you angle your hips away from the opponent's free arm once the lock is set?

Angling away from the free arm deepens the shoulder isolation, removes the space the opponent needs to dig a defensive underhook, and lines your legs up to threaten sweeps and the omoplata. Staying squared lets them drive forward and underhook, which neutralizes the shoulder lock and stalls your offense.

Where should the figure-four grip sit and why does grip height matter?

The figure-four should sit high around the opponent's upper arm near the shoulder joint, not low at the wrist or forearm. A high grip controls shoulder rotation and produces a real joint threat, while a low grip only traps the forearm and lets the opponent rotate their shoulder free, so the lock never becomes the dilemma that defines Williams Guard.

How do you keep the entry safe so a failed shoulder lock does not cost you the guard?

Maintain at least one active butterfly hook or leg frame throughout the entire entry rather than committing both legs to the arm. With a hook or frame still managing distance, a denied shoulder lock simply leaves you in butterfly guard, so the worst realistic outcome is a reset rather than being flattened and passed.

Butterfly Guard to Williams Guard Attacker | BJJ Technique Guide

As the attacker, your goal is to convert a neutral butterfly exchange into a shoulder-lock control hub by trapping the opponent’s arm in a figure-four before they recognize the threat. You start seated with butterfly hooks and an overhook on one arm. The moment the opponent commits that arm forward to grip, post, or pressure, you collapse their elbow into your chest and thread your free hand to your own wrist, locking the shoulder. Once the figure-four is set, you angle your hips away from their free arm to maximize joint isolation and deny them the underhook that would let them escape.

The entry rewards patience and timing over force. Rushing the figure-four against a posted, strong arm telegraphs the lock and invites a frame escape; instead you let the opponent’s own reaching, basing, or driving feed the arm into position. Throughout the entry your hooks and frames stay active so that if the shoulder lock is denied you simply retain butterfly guard rather than being flattened. When the lock lands cleanly you arrive in Williams Guard with the opponent already trapped in the mechanical dilemma that defines the position: defend the joint and open the sweep, or chase the pass and deepen the submission.

From Position: Butterfly Guard (Bottom)

Key Attacking Principles

What are the key principles for executing Butterfly Guard to Williams Guard?

Use an overhook as the pre-frame that becomes the figure-four shoulder lock, not a separate grip you scramble for
Let the opponent’s reaching, basing, or forward pressure feed their arm into overhook range rather than forcing it
Collapse the opponent’s elbow toward your chest before threading the figure-four to shorten the lever and prevent posture
Angle your hips away from the opponent’s free arm so they cannot establish the underhook that defeats the shoulder lock
Keep at least one butterfly hook or leg frame active so a failed entry retains butterfly guard instead of a pass
Complete the figure-four grip to your own wrist for a self-reinforcing lock that survives the opponent’s escape attempts
Treat the shoulder lock as a control mechanism first, reading the opponent’s reaction before committing to a finish

Prerequisites

What do you need before attempting Butterfly Guard to Williams Guard?

Seated butterfly guard with at least one hook active under the opponent’s thigh
An overhook or deep arm wrap secured on the side you intend to shoulder-lock
Opponent’s arm reachable in front of or across their centerline, not pinned to their hip
Hip mobility to angle off toward the controlled-arm side as the lock sets
A free hand available to thread the figure-four to your own wrist

Execution Steps

How do you execute Butterfly Guard to Williams Guard step by step?

Establish butterfly base and overhook: From seated butterfly guard with your hooks under the opponent’s thighs, secure a deep overhook on the arm you intend to attack, wrapping over their tricep and pinning their upper arm against your ribcage. Keep your back relatively upright and your head off the centerline so you are not exposed to a guillotine while you set the trap.
Bait the arm forward: Invite the opponent to commit the arm: let them reach for your collar or neck, post on the mat to defend a sweep, or drive forward to pressure. Each action loads their arm into your overhook. Stay patient and keep your hooks heavy so any sweep threat you carry keeps them reacting with that arm rather than retracting it.
Collapse the elbow: Pull the overhooked arm tight and drive their elbow down and across toward your own chest, shortening the lever and breaking their ability to posture up on that side. This bend is what isolates the shoulder; a straight arm cannot be shoulder-locked cleanly, so prioritize folding the elbow before you reach for the figure-four.
Thread the figure-four: Pass your free hand under or behind the opponent’s collapsed arm and grip your own opposite wrist, completing a figure-four around their upper arm and shoulder. The grip should sit high near the shoulder joint, not down at the wrist, so the lock controls the shoulder rotation rather than just the forearm.
Angle the hips off: Shrimp and rotate your hips away from the opponent’s free arm, turning your controlled-arm side toward them. This angle deepens the shoulder isolation, takes away the opponent’s space to drive an underhook, and aligns your legs to threaten sweeps and the omoplata. Maintain a hook or leg frame on the far side to control distance.
Settle into Williams Guard control: Confirm the shoulder-lock pressure is live by elevating the opponent’s elbow slightly and feeling their shoulder bind, then consolidate the position by stabilizing your hips, frames, and figure-four. You are now in Williams Guard Bottom, ready to read the opponent’s defensive reaction and flow into the shoulder-lock finish, omoplata, triangle, or sweep.

Possible Outcomes

Result	Position	Probability
Success	Williams Guard	55%
Failure	Butterfly Guard	30%
Counter	Butterfly Guard	15%

Opponent Counters

How might your opponent counter Butterfly Guard to Williams Guard?

Opponent straightens and rips the arm out before you complete the figure-four (Effectiveness: High) - Your Response: Do not chase the arm. Re-pommel for the overhook or switch to an underhook on the same side and reset your butterfly hooks, retaining guard rather than over-extending into a pass. → Leads to Butterfly Guard
Opponent digs a deep underhook with their free arm to kill the shoulder isolation (Effectiveness: Medium) - Your Response: Angle your hips harder away from the free arm and elevate with your hooks to break their chest connection, or abandon the lock and hit a butterfly or elevator sweep using the elevation you have created. → Leads to Butterfly Guard
Opponent drives chest-to-chest and flattens your butterfly hooks before the lock sets (Effectiveness: Medium) - Your Response: Use their forward pressure as momentum: underhook the driving arm and circle it into the figure-four while shooting your hips out, or hip-escape and re-establish frames to recover butterfly guard. → Leads to Butterfly Guard
Opponent posts hard and stands to back away from your seated guard (Effectiveness: Low) - Your Response: Follow with your hooks and overhook to maintain arm connection; if they fully disengage, you keep guard. If they leave the arm behind as they rise, the shoulder lock often deepens, converting their retreat into your finish. → Leads to Butterfly Guard

Common Attacking Mistakes

What mistakes should you avoid when executing Butterfly Guard to Williams Guard?

1. Reaching for the figure-four while the opponent’s arm is still straight

Consequence: A straight arm slides out of the shoulder lock easily, so the opponent extracts the limb and you lose both the overhook and your offensive position
Correction: Always collapse the elbow toward your chest first to shorten the lever, then thread the figure-four only once the arm is folded and the shoulder is isolated

2. Letting your head drift onto the centerline while setting the overhook

Consequence: Your exposed neck invites a guillotine or front headlock counter that flips the exchange against you
Correction: Keep your head off the centerline and to the outside of the controlled arm throughout the entry, protecting the neck while you build the lock

3. Killing both butterfly hooks to commit fully to the arm

Consequence: With no active hooks or frames, a denied shoulder lock leaves you flat and immediately passable
Correction: Maintain at least one hook or a leg frame the entire time so a failed entry simply retains butterfly guard rather than conceding the pass

4. Gripping the figure-four low at the wrist instead of high at the shoulder

Consequence: A low grip controls only the forearm, so the opponent rotates their shoulder free and the lock never threatens the joint
Correction: Set the figure-four high around the upper arm near the shoulder so the lock governs shoulder rotation and produces a real submission threat

5. Squaring your hips to the opponent rather than angling off

Consequence: A square position gives the opponent room to dig the free-arm underhook and drive forward, neutralizing the shoulder lock
Correction: Rotate your hips away from the opponent’s free arm to deepen isolation, deny the underhook, and align your legs for sweeps and omoplatas

6. Forcing the entry against a strong, defended arm

Consequence: Muscling the lock telegraphs your intent and burns energy while the opponent frames and escapes or passes
Correction: Be patient and let the opponent’s reaching, posting, or driving feed the arm into range so the figure-four lands on a committed, vulnerable limb

Training Progressions

How do you train Butterfly Guard to Williams Guard (Attacker)?

Week 1-2: Overhook and Figure-Four Mechanics - Building the overhook-to-figure-four connection from a static butterfly base With a compliant partner seated in front of you, drill securing the overhook, collapsing the elbow, and threading the figure-four to your own wrist. Focus on grip height near the shoulder and on keeping the head safe. 20-30 repetitions per side per session with no resistance.

Week 3-4: Reactive Entries - Reading the opponent’s arm commitment and angling off Partner feeds one of three reactions at 40-50% — reaching to grip, posting to base, or driving forward. Practice converting each into the shoulder lock and immediately angling your hips away from the free arm. 10-15 repetitions of each trigger per session.

Week 5-8: Retention Under Resistance - Completing the entry while maintaining butterfly guard if it fails Partner resists at 60-70%, actively straightening the arm, digging underhooks, and driving to flatten you. Drill completing the figure-four when possible and cleanly retaining butterfly guard with hooks and frames when the lock is denied. 3-5 minute rounds.

Month 3+: Live Positional Sparring - Hitting the entry against full resistance and chaining attacks Start in butterfly guard with full resistance. Work to enter Williams Guard and, once there, flow into the shoulder-lock finish, omoplata, triangle, or sweep based on the opponent’s defense. Reset on a clean pass or a confirmed entry. 5-minute rounds.

Safety Considerations

What are the safety concerns for Butterfly Guard to Williams Guard?

The figure-four creates real shoulder-lock pressure, so apply the rotation slowly and stop immediately at your partner’s tap, especially during reactive drilling where the opponent may feed the arm faster than expected. Avoid cranking the lock to force the entry; the shoulder is a vulnerable joint and a sudden jerk can injure the rotator cuff or labrum. Keep your own head off the centerline to protect against guillotine counters, and communicate clearly with newer partners before adding resistance.