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Half Guard Passing

Quick Introduction​

Half guard passing is the specialized skill of advancing when one leg is trapped between your opponent's legs. Unlike open or closed guard passing, half guard requires you to simultaneously free your trapped leg while preventing guard recovery. The most common "in-between" position in BJJ.

Technique Overview​

Style: Guard Passing — Specialized | Best against: Half guard bottom, knee shield, lockdown | Leads to: Side control, mount, back mount (from underhook pass)

Knee Slice Pass (Most Essential)​

  1. Establish position in opponent's half guard (one leg trapped)
  2. Achieve inside position — chest toward their chest
  3. Control their top knee with inside hand
  4. Establish underhook on far side with outside arm
  5. Drive opponent flat to their back (remove knee shield if present)
  6. Step outside leg far back and around
  7. Explosively slice trapped knee across their bottom thigh to mat
  8. Pull shin through completely
  9. Establish crossface with underhook arm
  10. Complete to side control with chest pressure

Key detail: Underhook is critical — prevents them turning for back take. Inside hand controls knee to prevent recovery. Knee slice must be explosive and low (slice, don't lift). Flatten them first — don't slice too early. Highest-percentage half guard pass in modern BJJ.

Hip Switch Pass (Classic Pressure)​

  1. Establish crossface (near-side arm across their face)
  2. Control far hip with other hand
  3. Drive weight into crossface to flatten them
  4. Switch hips toward head-side
  5. Lift trapped knee and rotate it over their legs
  6. Complete rotation — trapped leg extracts naturally during rotation
  7. Drive chest onto their chest in side control

Key detail: Don't try to pull leg free — rotation frees it naturally. Crossface pressure keeps them flat. Works best when knee slice is blocked. No speed required — pure technique.

Underhook Pass (Back Take Setup)​

  1. Achieve deep underhook (your hand reaches their far shoulder)
  2. Other hand establishes crossface
  3. Drive crossface to force them flat
  4. Step free leg back for base
  5. Drive trapped knee toward their hip
  6. Read their reaction:
    • Stay flat → extract leg, complete to side control
    • Turn away → take their back (4 points vs 3 for pass)
  7. Complete position based on their choice

Key detail: Underhook must be deep (not shallow). Creates a no-win scenario — their turning away gives you back mount. Don't force direction; let them choose their trap.

Smash Pass from Half Guard​

  1. Establish grips on legs/pants
  2. Lower level and drive chest forward
  3. Stack them onto shoulders (knees toward face)
  4. Trap bottom leg with free leg
  5. Maintain stacking pressure while freeing trapped leg
  6. Step around to side, establish crossface in side control

Key detail: Stacking pressure immobilizes hips. Don't release stack until leg is completely free. Works best when speed passes are blocked and opponent is stalling.

Core Principles​

  1. Inside position is key — Chest-to-chest better than chest-to-back
  2. Flatten first, pass second — Remove knee shield before attempting pass
  3. Underhook awareness — Control underhooks to prevent back takes and sweeps
  4. Read their reaction — Opponent's defense shows which pass to use
  5. Don't abandon position — If pass fails, maintain half guard top; reset and try again

Common Mistakes​

MistakeFix
Pulling leg free with strengthUse technique — knee slice or hip switch
Not flattening firstRemove knee shield/frames before passing
Poor underhook controlWin the underhook battle; losing it gives sweeps/back takes
Slicing knee too highKeep knee low to mat during slice
No crossface after passImmediate crossface prevents guard recovery
Telegraphing the passKnee slice needs some surprise; don't wind up obviously

Next Steps​

  1. Half Guard - Understand both sides of half guard
  2. Pressure Passing - Smash pass concepts
  3. Back Mount - From underhook pass when they turn