The Knee Slide from Combat Base—also known as the knee cut—is one of the highest-percentage guard passes in Brazilian Jiu-Jitsu. Initiated from combat base, this technique involves driving the lead knee diagonally across the opponent’s thigh line while simultaneously controlling their upper body with crossface and underhook grips. The cutting angle of the knee, combined with forward hip pressure, creates a passing force that separates the opponent’s legs and opens a direct path to side control.
The strategic value of this pass lies in its versatility and reliability across all levels of competition. Unlike speed-based passes that rely on narrow timing windows, the knee slide uses methodical pressure and upper body control to systematically dismantle guard structures. The technique works equally well in gi and no-gi, though grip variations differ. In the gi, collar and lapel grips provide additional control points, while no-gi relies more heavily on underhook position and head control through the crossface.
The knee slide integrates seamlessly into broader passing systems. When opponents defend the initial knee cut, natural chain reactions open pathways to long step passes, leg drags, or headquarters transitions. This creates a dilemma-based passing game where defending one threat exposes vulnerability to another. Mastery of the knee slide from combat base is considered a foundational skill for developing an effective top game and serves as the entry point for understanding pressure-passing mechanics that apply across all guard passing scenarios.
From Position: Combat Base (Top) Success Rate: 55%
Possible Outcomes
| Result | Position | Probability |
|---|---|---|
| Success | Side Control | 55% |
| Failure | Combat Base | 30% |
| Counter | Half Guard | 15% |
Attacker vs Defender
| Attacker | Defender | |
|---|---|---|
| Focus | Execute technique | Prevent or counter |
| Key Principles | Drive the knee diagonally across the opponent’s thigh at app… | Deny the crossface by framing against the passer’s lead shou… |
| Options | 7 execution steps | 4 defensive options |
Playing as Attacker
Key Principles
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Drive the knee diagonally across the opponent’s thigh at approximately 45 degrees rather than straight down, using hip weight to separate their legs along the cutting path
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Establish crossface control before initiating the knee cut to prevent the opponent from turning into you and creating defensive angles that block the pass
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Maintain constant hip-to-opponent contact throughout the cutting motion so no space opens for the bottom player to insert hooks or frames
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Coordinate upper body control and lower body cutting as a unified system where the crossface pressure and knee slide work simultaneously rather than sequentially
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Transfer weight progressively forward through the pass so the cutting knee acts as a blade rather than a weight-bearing point
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Keep the trailing leg active and ready to clear opponent’s guard hooks immediately after the cutting knee crosses the thigh line
Execution Steps
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Secure upper body control from combat base: From combat base, establish crossface with the lead arm by driving your forearm across the opponent’…
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Angle the lead knee toward the cutting line: Rotate your lead knee inward toward the opponent’s far hip, positioning the shin at approximately 45…
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Initiate the diagonal knee cut across the thigh: Drive your lead knee diagonally across the opponent’s thigh using hip pressure and forward weight tr…
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Intensify crossface pressure during the cut: As the knee crosses the opponent’s thigh line, increase crossface pressure by driving your shoulder …
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Pin the far hip and complete the knee slide to the mat: Use your trailing hand to control the opponent’s far hip, preventing them from shrimping away as you…
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Extract the trailing leg from guard entanglement: Windshield-wiper your trailing foot outward to clear any remaining hooks or leg entanglement from th…
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Consolidate side control with chest perpendicular to opponent: Settle your chest perpendicular to the opponent’s torso with direct contact across their upper body…
Common Mistakes
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Driving the knee straight down into the opponent’s thigh instead of cutting diagonally across
- Consequence: The knee stalls against the thigh without separating the legs, giving the opponent time to insert a knee shield or frame. The pass loses all momentum and the opponent recovers guard structure easily.
- Correction: Angle the knee diagonally at 45 degrees across the thigh, aiming for the mat on the far side of the opponent’s body. The hip pressure should drive along the cutting line, not downward into the thigh.
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Initiating the knee cut before establishing crossface or upper body control
- Consequence: The opponent freely turns into the passer, inserts frames, and recovers guard. Without head control, the bottom player can create angles that completely block the knee path and set up sweeps.
- Correction: Always establish crossface and far-side control before beginning the knee slide. The upper body vise must be in place before the lower body initiates the cutting motion.
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Lifting hips during the knee cut instead of maintaining constant hip-to-opponent contact
- Consequence: Creates space that allows the opponent to insert butterfly hooks, recover closed guard, or hip escape to create distance. Any gap between your hips and the opponent is immediately exploited.
- Correction: Keep hips heavy and in contact with the opponent throughout the entire cutting motion. Think of sliding your hip along the opponent’s body rather than lifting over them.
Playing as Defender
Key Principles
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Deny the crossface by framing against the passer’s lead shoulder before they can establish head control, as the crossface is the foundation of the entire pass
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Insert a knee shield or butterfly hook early when you recognize the knee slide initiation rather than waiting until the cutting knee is already on your thigh
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Maintain constant hip escape movement away from the cutting direction to prevent the passer from pinning your hips and completing the pass
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Fight aggressively for the near-side underhook to turn into the passer and create angles that block the cutting knee path
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Never allow your shoulders to be pinned flat to the mat—stay on your side facing the passer to preserve mobility and framing capability
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Time your defensive actions to the passer’s grip changes and weight shifts, deploying prevention at the moment of maximum vulnerability during their setup
Recognition Cues
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Passer shifts weight forward onto posted knee and drives lead shoulder toward your face, signaling crossface establishment
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Passer’s trailing hand moves to control your far hip or pants, establishing the anchor needed to complete the cut
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Lead knee rotates inward and angles diagonally toward your far hip rather than pointing straight ahead
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Crossface pressure suddenly intensifies as the passer loads weight onto their lead arm and shoulder
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Passer’s hips drop lower and angle forward, compressing the distance between combat base and your guard
Defensive Options
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Insert knee shield by placing your inside shin across the passer’s hip before the cutting knee crosses your thigh line - When: At the earliest recognition of knee slide initiation, before the passer establishes full crossface pressure and begins the cutting motion
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Frame against the passer’s crossface shoulder with your near-side forearm and hip escape away from the cutting direction - When: When the passer is establishing the crossface but has not yet initiated the knee cut, creating a window to deny the upper body control
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Pummel for the near-side underhook while turning onto your side to face the passer, creating an angle that blocks the cutting knee path - When: When you are on your side with the passer attempting to flatten you with crossface, and the knee cut has not yet completed across your thigh
Position Integration
The knee slide from combat base occupies a central position in the guard passing hierarchy, serving as the primary bridge between the combat base platform and side control consolidation. It chains directly with the knee cut from headquarters, knee slice from half guard variations, and toreando pass to create a comprehensive passing system. When the knee slide is blocked, it naturally flows into long step pass, backstep pass, or leg drag sequences. This interconnected web of passing options transforms the knee slide from a single technique into a systematic gateway that connects virtually all pressure-based guard passing methods. Understanding this technique’s role within the passing ecosystem is essential for developing fluid, reactive top game strategy that keeps opponents defensive and unable to establish preferred guard configurations.