SAFETY: Kimura from Knee Shield Half Guard targets the Shoulder joint, rotator cuff, and shoulder capsule. Risk: Rotator cuff tear (supraspinatus, infraspinatus, teres minor, subscapularis). Release immediately upon tap.
The Kimura from Knee Shield Half Guard is a bottom-player shoulder lock attack that leverages the structural distance created by the knee shield frame. Unlike Kimura attempts from flat half guard where the top player’s weight makes grip establishment difficult, the knee shield maintains separation that allows the bottom player to identify arm placement opportunities and thread the figure-four grip without being smashed. This makes it one of the more accessible Kimura entries from the bottom position.
The setup typically arises when the top player posts a hand on the mat for base, reaches across the body for grips, or extends an arm during a passing attempt. The bottom player captures the wrist with their near hand and threads the far arm under the opponent’s tricep to establish the figure-four grip. The knee shield serves a critical dual function throughout the attack: it prevents the top player from driving forward to stack and escape while providing the bottom player with the hip mobility needed to create the perpendicular finishing angle.
This submission integrates naturally into the Kimura Trap system used extensively in modern competitive grappling. If the initial rotational finish is defended, the figure-four grip itself becomes a powerful control handle for sweeps, back takes, and transitions to other submissions. The grip is the position—even when the tap is not immediately available, maintaining the figure-four from knee shield creates a dominant control state that threatens multiple outcomes.
Category: Joint Lock Type: Shoulder Lock Target Area: Shoulder joint, rotator cuff, and shoulder capsule Starting Position: Knee Shield Half Guard From Position: Knee Shield Half Guard (Bottom) Success Rate: 50%
Safety Guide
Injury Risks:
| Injury | Severity | Recovery Time |
|---|---|---|
| Rotator cuff tear (supraspinatus, infraspinatus, teres minor, subscapularis) | High | 3-9 months with potential surgery requirement |
| Shoulder capsule damage and dislocation | CRITICAL | 6-12 months, may require surgical repair |
| Labral tear (glenoid labrum) | High | 4-8 months, often requires arthroscopic surgery |
| Bicep tendon strain or rupture | Medium | 6-12 weeks for strain, 3-6 months for rupture |
Application Speed: SLOW and progressive - 3-5 seconds minimum in training, allowing partner time to recognize danger and tap
Tap Signals:
- Verbal tap (saying ‘tap’ or making any verbal distress sound)
- Physical hand tap (multiple taps with free hand)
- Physical foot tap (multiple taps with either foot)
- Any distress signal including screaming or unusual sounds
Release Protocol:
- Immediately stop all rotational pressure the instant tap is felt or heard
- Return the arm toward neutral position by externally rotating back to starting position
- Release the figure-four grip completely
- Allow partner to self-assess shoulder mobility before continuing
- Never release suddenly or allow arm to spring back forcefully
Training Restrictions:
- Never spike or jerk the submission—rotation must be smooth and controlled
- Never use competition speed or surprise attacks in training
- Always ensure partner has at least one hand free to tap
- Do not apply while partner is in awkward body position that prevents tapping
- Never combine with weight pressure that restricts breathing while finishing
- Respect immediate taps without testing partner’s pain tolerance
Outcomes
| Result | Position | Probability |
|---|---|---|
| Success | game-over | 50% |
| Failure | Knee Shield Half Guard | 30% |
| Counter | Half Guard | 20% |
Attacker vs Defender
| Attacker | Defender | |
|---|---|---|
| Focus | Execute and finish | Escape and survive |
| Key Principles | Maintain knee shield integrity while hunting for the wrist—n… | Keep elbows tucked close to your body—never post hands on th… |
| Options | 6 execution steps | 3 defensive options |
Playing as Attacker
Key Principles
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Maintain knee shield integrity while hunting for the wrist—never sacrifice the frame to reach for grips
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Capture the wrist before threading the figure-four; reversing this order allows the opponent to retract their arm
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Hip escape to create a perpendicular angle before attempting the finish—attacking straight on gives the opponent leverage to stack
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Pin the captured elbow tight to your ribcage to eliminate space for the opponent to straighten their arm and escape
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Apply rotational pressure slowly and steadily, driving the wrist toward the mat behind the opponent’s back
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Maintain the bottom leg hook throughout the attack to prevent the opponent from stepping over and extracting
Execution Steps
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Identify the attacking opportunity: From established knee shield half guard, monitor the opponent’s hand placement and arm positioning. …
-
Capture the wrist: With your near hand (same side as the targeted arm), grip the opponent’s wrist using a firm C-grip w…
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Establish the figure-four grip: Thread your far arm underneath the opponent’s tricep from the outside, reaching through to connect y…
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Create the finishing angle with hip escape: Hip escape away from the opponent to create a perpendicular angle to their body, aiming for approxim…
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Pin the elbow and consolidate control: Draw the opponent’s captured elbow tight against your ribcage, eliminating any gap between their upp…
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Apply the rotational finish: With the elbow pinned and perpendicular angle established, drive the opponent’s wrist in a smooth ar…
Common Mistakes
-
Dropping the knee shield to reach for the opponent’s arm
- Consequence: Opponent collapses into smash passing position and advances past the guard before the grip is established
- Correction: Maintain knee shield integrity throughout the entire grip establishment phase. Only adjust the shield after the figure-four is fully locked and secure.
-
Attempting to finish without creating a perpendicular hip angle
- Consequence: Opponent uses their top position weight advantage to stack and defend, neutralizing the rotational pressure entirely
- Correction: Hip escape to create at least a 45-degree angle before applying any rotational pressure. Ideally achieve 90 degrees for maximum finishing leverage.
-
Loose figure-four grip with elbows flared away from the body
- Consequence: Opponent extracts their arm through the gap created between your arms and torso, escaping the submission completely
- Correction: Keep elbows squeezed tight to your ribcage throughout the entire attack sequence. The grip should feel like a vise with no space for the arm to slide through.
Playing as Defender
Key Principles
-
Keep elbows tucked close to your body—never post hands on the mat within the opponent’s reach from knee shield
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Recognize the attack early by monitoring the opponent’s grip changes and hip escape movement
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Drive forward into the opponent to eliminate the space that the knee shield creates for the attack
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If the wrist is captured, immediately straighten the arm before the figure-four grip is established
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Use clasping hands defense as secondary defense if the figure-four locks—combine with forward pressure
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Never allow the opponent to create a perpendicular angle—follow their hip movement by circling toward their head
Recognition Cues
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Opponent’s near hand releases their standard guard grip (collar, sleeve, or wrist) and reaches toward your posting or reaching arm
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Opponent begins hip escaping while maintaining the knee shield, creating lateral angle typically used for the finishing position
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You feel your posting hand or extended arm being pulled toward the opponent’s hip with increasing urgency
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Opponent’s far arm threads underneath your tricep, seeking the figure-four connection on the other side of your arm
Escape Paths
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Straighten the captured arm forcefully and retract elbow tight to the body before the figure-four grip is fully established
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Clasp hands in gable grip and drive forward with heavy pressure while walking toward the opponent’s head to relieve rotation angle
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Roll toward the kimura direction to relieve rotational shoulder pressure while working to separate the attacker’s figure-four connection
From Which Positions?
Match Outcome
Successful execution of Kimura from Knee Shield Half Guard leads to → Game Over
All submissions in BJJ ultimately converge to the same terminal state: the match ends when your opponent taps.