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Knee-Through Smash Pass

PassHalf-guard pressure passBelt: blue+Risk: moderateIBJJFADCCNo-GiSub-OnlyMMA

The Knee-Through Smash Pass is a pressure-based half guard pass where the top player uses a deep underhook and drives their knee through the opponent's legs to transition directly to mount. This pass is highly effective against knee-shield and deep half variations, neutralizing frames with tight chest-to-chest connection and heavy weight distribution.

Start
Top half guard, underhook secured
End
Mount
Prerequisites: Cross-face control · Establishing an underhook · Tripod base in top half guard · Clearing knee-shield frames

Steps

  1. 1
    Establish Deep Underhook and Cross-Face
    From top half guard, secure a deep underhook with your far arm, threading your hand to opponent’s far lat, while your near arm cross-faces with a palm-on-shoulder grip, turning their face away.
  2. 2
    Flatten Opponent’s Shoulders
    Drive your chest heavy onto their upper body, making sure their shoulders are flat on the mat, and sprawl your hips back to prevent them from reguarding.
  3. 3
    Pinch Knees and Isolate Nearside Leg
    Pinch your knees tightly around their trapped thigh, using your inside knee to block their hip and your outside foot to post wide for base.
  4. 4
    Slide Knee Across the Thigh
    Shift your weight chest-to-chest, then windshield-wiper your inside knee across their thigh at a 45° angle, aiming to bring your knee to the mat on the far side of their body.
  5. 5
    Control Opponent’s Far Hip
    As your knee comes through, switch your underhook hand to grip their far hip or belt (gi) or cup their hip bone (no-gi), anchoring them in place.
  6. 6
    Free Trapped Foot
    With your knee now on the mat, use your outside foot to back-step or windshield-wiper, freeing your trapped foot from their half guard.
  7. 7
    Settle Into Mount
    Slide your hips low and heavy, bringing your second knee across their body, and establish a wide base with both knees on the mat, chest-to-chest, securing mount.
  8. 8
    Establish Mount Control
    Immediately transition to a grapevine or S-mount variation as needed, maintaining head and arm control to prevent bridging escapes.

Key details most people miss

  • Angle your knee at 45° across their thigh, not straight forward, to avoid getting caught in quarter guard.
  • Keep your cross-face pressure consistent throughout, especially during the knee slide, to prevent opponent from turning in.
  • Switch your underhook to a hip grip as your knee passes, anchoring their hips and blocking hip escapes.
  • Use your outside foot as a post for balance and to help free your trapped leg without sacrificing base.

Common mistakes

  • If you allow your opponent to turn into you during the knee slide, they will recover guard or deep half.
  • Sliding your knee straight forward instead of at an angle often results in getting stuck in quarter guard.
  • Failing to maintain chest-to-chest pressure gives your opponent space to insert frames and recompose guard.
  • Not controlling the far hip after passing the knee allows the opponent to shrimp and recover half guard.

Counters & responses

They try: Opponent frames hard on your hip with their top knee
You do: Switch your cross-face hand to clear their knee with a C-grip and re-establish chest pressure before continuing the knee slide.
They try: Opponent turns to deep half guard as you initiate the knee-through
You do: Drop your hips low, sprawl your weight back, and use your underhook to flatten their shoulders before resuming the pass.
They try: Opponent traps your ankle in quarter guard as you pass
You do: Use your outside foot to windshield-wiper and circle your trapped foot free, then immediately settle your hips to mount.
They try: Opponent bridges explosively as you clear the knee
You do: Widen your base with your posting foot and grapevine their far leg to absorb the bridge and stabilize mount.

Drill prescription

5 rounds × 3 minutes; partner provides 60% resistance with realistic framing and bridging; goal: 4 clean transitions to mount per round with no quarter guard entanglement.

How the masters teach it

Videos are still being curated for this technique. AI suggests these instructors:
Bernardo Faria — Emphasizes deep underhook and relentless chest pressure, often combining with cross-face to nullify bottom frames.Lucas Lepri — Known for precision in angle and knee placement, using minimal space and tight hip control to prevent reguard.John Danaher — Focuses on micro-adjustments in weight distribution and systematic control of the far hip during the knee-through.Xande Ribeiro — Integrates the knee-through with mount stabilization, emphasizing immediate transition to grapevine or S-mount.
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