As the attacker executing the Knee Slide from Flattened Half Guard, you are operating from a position of significant advantage. Your opponent is flattened, their frames are collapsed, and your crossface is turning their head away from the action. The technical challenge is converting this dominant control into a completed guard pass by extracting your trapped leg without sacrificing the pressure that keeps them immobilized. The knee slide achieves this by creating an angular path for your knee to travel across their thigh line while your upper body maintains constant forward drive. Success depends on timing the slide with moments when your opponent is managing your pressure rather than actively defending the leg extraction, and maintaining chest contact throughout the entire movement so no recovery space is created.
From Position: Flattened Half Guard (Top)
Key Attacking Principles
What are the key principles for executing Knee Slide from Flattened Half?
- Maintain chest-to-chest pressure throughout the entire knee slide - any lift creates recovery space for the bottom player
- Create the passing angle through hip displacement before driving the knee across, rather than forcing the knee through direct resistance
- Drive the crossface deeper as you initiate the slide to compound pressure and prevent the bottom player from turning into the pass
- Use the free leg as a posting base and driving engine, not just passive support - push off the mat to generate forward momentum through the slide
- Time the knee slide with moments when the bottom player is breathing or managing pressure, not when they are actively defending
- Treat the knee slide as one option in a passing chain - if they defend the slide, immediately transition to crossface pass or back take
Prerequisites
What do you need before attempting Knee Slide from Flattened Half?
- Crossface established with forearm or bicep driving across opponent’s face and neck, turning their head away from passing direction
- Chest-to-chest contact maintained with heavy forward pressure through sternum and ribcage onto opponent’s torso
- Bottom player’s frames fully collapsed with no active knee shield or forearm frames between your bodies
- Far-side underhook or shoulder control secured to prevent bottom player from turning away during the pass
- Trapped leg positioned with knee aligned to angle across opponent’s thigh rather than pointing straight down
Execution Steps
How do you execute Knee Slide from Flattened Half step by step?
- Confirm crossface and pressure: Before initiating the slide, verify that your crossface is driving their head away from the passing direction and your chest pressure is fully settled onto their torso. Your weight should flow through your chest and hips, not your arms. Take one breath cycle to confirm these controls are solid before committing to the pass.
- Shift hips toward passing side: Begin displacing your hips laterally toward the side you intend to pass to. This creates the angular lane your knee needs to travel across the opponent’s thigh line. The hip shift should be subtle but deliberate - too dramatic and you telegraph the pass, too small and you lack the angle to clear the hook. Drive this movement through your free leg posting against the mat.
- Angle trapped knee diagonally: Rotate your trapped knee so it points diagonally across the opponent’s body toward the far hip rather than straight down toward the mat. This angular positioning converts your forward pressure into a lateral sliding force that shears through the half guard hook. Keep your shin contact against their inner thigh to maintain control during the rotation.
- Drive knee across thigh line: With the angle established, push off your free foot and drive your knee across the opponent’s thigh line in a smooth, continuous motion. Maintain chest pressure by dropping your weight forward as the knee travels. The movement should feel like you are sliding through rather than stepping over. Your crossface arm increases pressure during this phase to pin their upper body while your lower body advances.
- Clear the hook and extend: As your knee clears the opponent’s thigh line, straighten your leg to fully extract from the half guard hook. Push your foot through and away from their legs while maintaining chest and shoulder pressure on their torso. The extraction should be a continuation of the sliding momentum, not a separate pulling motion that creates space. If the hook is tight, use your shin to pry against their top leg as you extend.
- Drop hips to seal position: Once the leg clears, immediately drop your hips to the mat on the far side to prevent the bottom player from re-inserting a knee or recovering any guard structure. Your hips should land heavy against their hip, creating a seal that blocks guard recovery. Do not leave your hips elevated or you create space underneath that allows re-guard attempts.
- Consolidate to side control: Shift your crossface arm from the passing configuration to standard side control positioning. Slide the arm under their head to establish the standard crossface from side control, or transition to an underhook on the far arm. Simultaneously adjust your near arm to block their far hip, completing the transition to a consolidated side control position with full scoring pressure.
Possible Outcomes
| Result | Position | Probability |
|---|---|---|
| Success | Side Control | 55% |
| Failure | Flattened Half Guard | 30% |
| Counter | Half Guard | 15% |
Opponent Counters
How might your opponent counter Knee Slide from Flattened Half?
- Bottom player shrimps and re-inserts knee shield during the slide (Effectiveness: High) - Your Response: Maintain heavy crossface throughout and drop your weight forward immediately when you feel their hip movement. If the knee gets partially inserted, drive your chest over their knee to re-flatten before they establish the shield fully. You may need to reset to flattened half guard and re-attempt. → Leads to Flattened Half Guard
- Bottom player secures deep underhook and threatens sweep during weight transfer (Effectiveness: Medium) - Your Response: Use your free hand to whizzer their underhook arm immediately and drive your shoulder weight onto their chest to kill the underhook leverage. If the underhook is deep, abandon the knee slide momentarily, re-establish crossface control, and strip the underhook before re-attempting the pass. → Leads to Half Guard
- Bottom player hooks inside the knee with their outside leg, blocking the slide path (Effectiveness: Medium) - Your Response: Use a hip switch to change the angle of attack. Briefly shift your hips to face the opposite direction, which clears the hook block, then redirect back to complete the knee slide from the new angle. Alternatively, transition to a crossface pass that goes around their hook rather than through it. → Leads to Flattened Half Guard
- Bottom player turns away to turtle and prevent the pass completion (Effectiveness: Low) - Your Response: Follow their rotation immediately and transition to back control. Their turning motion exposes their back, and your crossface control gives you the angle to climb onto their back as they rotate. Secure seatbelt control and hooks as they turtle rather than continuing the pass. → Leads to Flattened Half Guard
Safety Considerations
What are the safety concerns for Knee Slide from Flattened Half?
The knee slide from flattened half guard carries low injury risk compared to submission techniques but requires awareness of knee safety for both practitioners. The top player should avoid hyperextending the trapped knee by maintaining a controlled slide angle rather than forcing the knee through excessive resistance. The bottom player’s knee can be stressed if the top player drives lateral pressure against the hook while the foot is trapped. Both players should communicate if knee pressure becomes uncomfortable. In training, use controlled speed during the slide phase to prevent unexpected torque on either player’s knee joints.