BJJ Half Guard System: Complete Guide
BJJBJJ App Team·⏱️ 2 min read·🔄 Mar 31, 2026
☰Contents
Master the BJJ half guard system: deep half, lockdown, underhook half guard, sweeps, submissions, and how to pass the half guard.
Contents
Why Half Guard Is One of the Best Guards in BJJ
Half guard is often dismissed as an "accidental" guard — something you land in when a full guard pass fails. In reality, half guard is a sophisticated, high-percentage guard with its own complete sweep and submission system. Many elite competitors build their entire game around it.
Half Guard Variants
| Variant | Position | Primary Goal |
|---|---|---|
| Basic Half Guard | Knee shield + frame | Prevent pass, recover guard |
| Underhook Half Guard | Deep underhook on far side | Come to knees / single leg / back |
| Deep Half Guard | Head under their thigh, arm around far leg | High-percentage sweeps |
| Lockdown Half Guard | Figure-4 on their leg (lockdown) | Control, whip-ups, electric chair |
| Z-Guard (Knee Shield) | Knee as a frame against their hip | Keep distance, recover open guard |
Best Sweeps from Half Guard
Underhook Half Guard Sweep (Homer Simpson)
- Get an underhook on their far side.
- Force them to base their hand.
- Lock your inside leg, rotate, come to top.
Deep Half Guard Sweep
- Drive your head under their thigh while gripping their far ankle.
- Bridge and roll toward them — use their own weight.
- Come to top position as they roll.
Lockdown Electric Chair
- Apply lockdown on their leg.
- Frame on their hip, create angle.
- "Electric chair" — force their leg straight and sweep them over.
Submissions from Half Guard
- Kimura: Deep half position gives excellent kimura entries on the near arm.
- Guillotine: When they shoot for a pass and expose their neck — snap on a guillotine entry.
- Straight ankle lock: From lockdown, when you create space, their ankle is exposed.
Passing Half Guard (Top)
Knee Slice Pass
The most common half guard pass. Drive your knee through their legs while blocking their knee shield with your shoulder. Land in side control.
Smash Pass (Twister Side Control)
Flatten them, sprawl with your hips, drive their knee to the mat, and swim your leg free.
⚠️ The underhook battle: Whoever wins the underhook in half guard usually wins the position. If they get an underhook, kill it immediately by getting your own underhook or using a whizzer (over-hook).
FAQ
Is half guard good for beginners?
Yes — especially the knee shield/Z-guard variant. It's more forgiving than open guards because you have more control over the distance, and it teaches fundamental concepts (framing, underhooks, hip movement) that transfer to all guards.
What's the best sweep from half guard?
The underhook sweep is the highest-percentage for most practitioners because it's reliable against all opponents. The deep half guard sweep is extremely powerful but requires more drilling to set up correctly.
How do I stop my half guard from being passed?
The key is maintaining your knee shield (don't let them flatten it) and constantly fighting for the underhook. If you lose both your knee shield and the underhook battle, your half guard will be passed consistently.