Wedges is a low complexity BJJ principle applicable at the Fundamental level. Develop over Beginner to Advanced.
Application Level: Fundamental Complexity: Low Development Timeline: Beginner to Advanced
What is Wedges?
Wedges are one of the oldest mechanical principles in human toolmaking, and they appear everywhere in Brazilian Jiu-Jitsu. A wedge is any body part inserted into a gap to pry space open, redirect force along a new vector, or block an opponent’s movement path. The knee shield in half guard is a wedge. The elbow driven inside an opponent’s thigh during a guard pass is a wedge. The shin inserted across an opponent’s hip line to retain guard is a wedge. Every time you slide a forearm under a chin, post a knee between entangled legs, or drive an elbow into the crease of someone’s hip, you are applying wedge mechanics.
What separates a wedge from a simple frame or post is its direction of action. A frame resists force head-on. A wedge splits force apart or redirects it laterally. When you insert your knee shield in half guard, you are not simply blocking your opponent’s chest — you are angling their pressure away from your centerline and creating a channel of space along which you can hip escape or re-guard. When a passer drives a knee inside the bottom player’s thigh, the wedge separates the legs and opens a passing lane. Wedges work because they convert a single line of force into two diverging lines, and the opponent can only chase one.
Developing wedge awareness means learning to feel for gaps — the tiny spaces between your body and your opponent’s where a knee, shin, elbow, or forearm can be inserted before the opponent closes them. Speed of insertion matters as much as placement, because gaps in grappling are transient. The practitioner who consistently finds and fills these gaps with well-angled wedges controls the geometry of the exchange, dictating where force travels and where space exists.
Building Blocks
- Insert the wedge into the gap before the opponent can close it — timing is critical
- Angle the wedge to redirect force laterally rather than opposing it directly
- Use bony, hard surfaces (shin, forearm, elbow, knee) for maximum mechanical advantage
- Drive the wedge along its tapered axis to amplify the splitting effect
- Combine wedges with hip movement to convert created space into positional change
- Withdraw and reinsert wedges as gaps shift during scrambles
- Layer multiple wedges to control both upper and lower body simultaneously
- Recognize that every guard retention sequence starts with a wedge between you and the passer
- Understand that wedges are temporary tools — use the space they create before it closes
Prerequisites
Gap Recognition: The ability to sense or see the transient spaces between your body and the opponent where a wedge can be inserted. This requires tactile sensitivity and an understanding of how positions create natural openings — for example, the space between an opponent’s hip and your thigh in half guard, or the gap under the chin when someone reaches for an underhook.
Insertion Speed and Timing: Wedges must be inserted during the brief window when a gap exists. Developing the reflexive speed to slide a knee, shin, or elbow into position before the opponent can close the space is essential. This often means inserting the wedge during the opponent’s movement rather than waiting for them to settle.
Angle Optimization: Positioning the wedge at the correct angle to maximize its splitting or redirecting effect. A knee shield angled at 45 degrees across the opponent’s chest redirects far more pressure than one lying flat. Understanding how wedge angle changes the direction of redirected force is key to making wedges effective against larger opponents.
Progressive Driving: Once a wedge is inserted, driving it deeper along its axis to amplify the space created. This involves coordinated hip, core, and limb movement to advance the wedge progressively — for example, driving the knee shield deeper while simultaneously hip escaping to maximize the space created.
Wedge Sequencing: Using one wedge to create the gap for a second wedge, building a cascade of space creation. In guard retention, the first shin wedge stops the passer, the second knee wedge creates an angle, and a foot on the hip completes the re-guard. Understanding how to chain wedge insertions turns a single defensive action into a full recovery sequence.
Hard Surface Selection: Choosing the right body part for each wedge application. Shins and forearms provide broad, hard surfaces for blocking. Elbows and knees offer narrow, penetrating points for splitting. Selecting the appropriate surface for each context determines whether the wedge holds under pressure or collapses.
Wedge-to-Movement Conversion: Translating the space created by a wedge into actual positional change. A wedge that creates space but is not followed by hip escape, re-guard, or passing movement is wasted. This skill links the mechanical space creation of the wedge to the larger tactical goal of changing position.
Defensive Wedge Awareness: Recognizing when the opponent is inserting wedges against you and knowing how to deny or collapse them. This includes pinching knees to prevent knee wedge insertion, flattening hip angle to deny shin wedges, and swimming arms past elbow wedges before they can be driven deeper.
Where to Apply
Half Guard: The knee shield is the quintessential wedge — the shin placed diagonally across the opponent’s chest redirects their forward pressure laterally and creates space to re-guard or attack. Adjusting the angle and height of the knee shield changes which passing lanes are blocked.
Closed Guard: Inserting an elbow wedge inside the opponent’s bicep prevents them from establishing posture. A forearm wedge across the collarbone breaks posture and creates the angles needed for sweeps and submissions. The legs themselves act as wedges controlling hip distance.
Side Control: From bottom, inserting a knee wedge between your hip and the opponent’s body creates the initial space for guard recovery. The elbow driven to the mat inside the opponent’s hip line acts as a wedge that prevents them from consolidating chest-to-chest pressure.
Mount: From bottom, getting an elbow inside the opponent’s thigh acts as a wedge to begin the elbow escape. The knee driven upward between bodies creates the space needed to slide a leg through and recover half guard or full guard.
Butterfly Guard: The butterfly hooks themselves function as wedges inserted under the opponent’s thighs. When driven upward, they split the opponent’s base apart and create the elevation needed for butterfly sweeps. The angle of insertion determines sweep direction.
De La Riva Guard: The De La Riva hook wraps the opponent’s lead leg, but the free foot acts as a wedge on the far hip, creating distance and preventing the passer from smashing through. The shin across the thigh redirects the passer’s forward drive into lateral drift.
Open Guard: Feet on hips serve as wedges that maintain minimum distance and redirect passing pressure. Shins inserted across the opponent’s hip line act as barriers that the passer must overcome before consolidating any pass.
Turtle: From turtle, wedging elbows tight against the inner thighs prevents the opponent from inserting hooks for back control. The forearms act as wedges against the opponent’s hands, blocking their seatbelt or harness grip attempts.
Back Control: The defender uses elbow wedges against the choking arm, inserting the forearm between the opponent’s wrist and their own neck. This wedge blocks the choke path and creates the angle needed to begin escaping the back position.
Headquarters Position: The passer uses the lead knee as a wedge driven inside the guard player’s thigh, splitting the legs apart and creating the space to complete a knee cut or leg drag pass. The angle and depth of this knee wedge determine whether the pass succeeds.
North-South: From bottom, inserting forearm wedges against the opponent’s hips prevents them from settling their weight fully. These wedges create enough separation to begin turning to turtle or sliding back toward guard recovery.
Knee Shield Half Guard: The entire position is built around the knee shield wedge. The bottom player’s shin across the opponent’s torso redirects smashing pressure while the knee angle controls which passing angles remain available. Adjusting the wedge height between low knee shield and high knee shield changes the defensive and offensive options.
Combat Base: The posted knee in combat base acts as a wedge that splits the guard player’s legs and creates passing angles. Driving this knee forward or laterally opens different passing lanes while the posted foot provides base.
Clinch: In the clinch, forearm wedges against the opponent’s chest or neck create separation and deny them the tight clinch they need for throws. An elbow wedge driven inside the opponent’s bicep line prevents them from establishing an underhook.
How to Apply
- Identify the opponent’s primary pressure line or movement direction: Feel where the opponent’s weight and force are traveling. The wedge should be inserted perpendicular to this line to split the force into two weaker vectors rather than opposing it head-on.
- Locate the nearest available gap between your body and the opponent: Scan for spaces — the gap between hip and thigh, the space under the chin, the opening between chest and arm. These are the insertion points for your wedge. If no gap exists, use a frame to create one first.
- Select the appropriate body part for the wedge: Choose based on the gap size and the force required. Shins and forearms for broad blocking wedges, elbows and knees for narrow splitting wedges. Use hard, bony surfaces rather than soft tissue.
- Insert the wedge with speed and commitment: Drive the wedge into the gap decisively. Half-inserted wedges are easily collapsed. Coordinate the insertion with a hip movement or weight shift that helps drive the wedge deeper into position.
- Set the correct wedge angle to maximize force redirection: Adjust the angle so the wedge directs force away from your vulnerable areas. A knee shield at 45 degrees redirects chest pressure toward the mat. A forearm wedge angled under the chin lifts the head and breaks posture.
- Drive the wedge progressively deeper while moving your hips: Do not let the wedge sit static. Advance it while simultaneously hip escaping or repositioning to amplify the space created. The wedge creates opportunity — hip movement converts it into positional change.
- Decide whether to chain a second wedge or convert to escape or pass: If one wedge has created sufficient space, use it immediately for guard recovery, escape, or pass completion. If more space is needed, insert a second wedge in the new gap created by the first.
- Withdraw the wedge once the positional goal is achieved: Wedges are temporary tools. Once you have recovered guard, completed the pass, or escaped the pin, transition the wedge limb to its next role — gripping, hooking, posting, or attacking.
Progress Markers
Beginner Level:
- Recognizes the knee shield as a defensive barrier but does not understand its wedge mechanics
- Attempts to insert wedges after the opponent has fully settled, resulting in muscular struggling
- Uses flat, soft surfaces rather than bony edges for wedge contact
- Inserts wedges but does not follow with hip movement, allowing the opponent to re-close the gap
Intermediate Level:
- Consistently inserts knee shield and elbow wedges during guard retention before the passer consolidates
- Angles wedges perpendicular to pressure for effective force redirection
- Follows wedge insertion with hip escape to convert space into positional change
- Begins using offensive wedges during guard passing (knee inside thigh, elbow against knee line)
- Recognizes and attempts to deny opponent’s wedge insertions from top position
Advanced Level:
- Chains multiple wedges in sequence to systematically dismantle pins or guard structures
- Inserts wedges during the opponent’s transitions, exploiting the brief gaps that appear during movement
- Selects optimal wedge surface (shin, forearm, knee, elbow) based on gap size and force requirements
- Integrates wedge insertion into complete escape, retention, and passing systems seamlessly
- Denies opponent wedges proactively by maintaining tight pressure and eliminating gaps before they form
Expert Level:
- Uses wedge insertions to manipulate the opponent’s reactions, baiting responses that open other attack paths
- Creates wedge opportunities through subtle weight shifts and angle changes that most opponents cannot detect
- Teaches wedge mechanics clearly, distinguishing wedges from frames and posts for students at all levels
- Applies wedge principles in novel scramble situations where standard techniques do not apply
- Maintains continuous wedge awareness from both top and bottom, never allowing gaps to persist and never missing insertion opportunities