Half Guard BJJ: The Complete Half Guard System

The Evolution of Half Guard

For the first decade of BJJ's spread in the West, half guard was considered a failed guard. You ended up there when someone passed your closed guard halfway. The goal was simply to recover full guard or escape to your feet.

Roberto "Gordo" Correa changed everything. After a knee injury forced him to stay in half guard during recovery, he developed an entire attacking system from the position. Today, players like Jeff Glover, Tom DeBlass, and Lucas Leite have built entire championship game plans around half guard variations.

Half guard is now recognized as one of the most legitimate guard positions in the sport — offensive, creative, and full of surprises.

Half Guard Fundamentals

Basic half guard positions one of your legs between both of the opponent's legs, typically controlling their bottom leg with your inner knee and outer leg. The challenges are:

• Opponent will try to flatten you out — killing your hip movement
• They'll fight for the cross-face to break your defensive frame
• They'll look to establish the underhook to take your back

Defensive Priorities in Half Guard

• Fight for the underhook — the side with the underhook controls the direction of the match
• Use your near-side elbow as a frame against the cross-face
• Stay on your side, never let them flatten you to your back
• Keep your head close to their body to prevent the underhook from being cleared

The Underhook Game from Half Guard

Half guard with the underhook is one of the most dangerous positions in BJJ. Once you have the underhook, you can:

• Stand up to your knees and take a single or double leg
• Take the back by walking your feet to the far side
• Sweep to the top by driving through the underhook
• Transition to knee shield and then to butterfly or closed guard

The underhook is so important that some practitioners build their entire half guard strategy around the single goal of achieving it. Once it's yours, the opponent is in serious trouble.

Deep Half Guard

Deep half guard occurs when you slide completely under the opponent's leg, placing their weight on your body while you control their leg. This is an advanced position that Jeff Glover popularized in competition.

Getting to Deep Half

From standard half guard, you dive under by swimming your outside arm under their far leg, positioning your shoulder under their thigh. Your head is between their legs, their weight sits on your body.

Attacks from Deep Half

• Back roll sweep: roll backward to elevate them and come on top
• Waiter sweep: use your inside leg to drive their far leg while rolling
• Homer Simpson sweep: when they try to step over, you sweep to top
• Back take: when they reach for your near leg, take their back

Deep half guard is particularly effective against people who sit heavy in your half guard — the deeper they sink, the more leverage you have.

The Lockdown

The lockdown is a leg entanglement from half guard where you wrap their lower leg with both your legs in a figure-four position — your top foot hooked behind your knee, your lower leg under their calf. Eddie Bravo popularized this from his 10th Planet system.

The lockdown immobilizes the trapped leg and creates mechanical leverage for sweeps. The electric chair (leg stretch forcing a sweep) is the signature attack from lockdown and can generate enormous pressure on the hip and knee.

Note: The lockdown is primarily useful for beginners to intermediate players and very flexible individuals. High-level players often escape the lockdown, but it remains a legitimate tool in the right matchup.

Z-Guard (Knee Shield Half Guard)

Z-guard puts your knee across the opponent's hip as a frame while your feet control their thigh. This creates distance — preventing them from establishing the cross-face and flattening you. The Z-guard knee shield is an intermediate position that protects you while you work for the underhook or transition to other guards.

• Knee shield blocks cross-face and maintains space
• From here you can transition to butterfly guard or closed guard
• The knee can be repositioned to create a leg frame for sweeps
• Kimura attacks open up from Z-guard when they try to remove the frame

K-Guard and Modern Half Guard Variations

K-guard (knee shield with the leg hooked inside the far thigh) connects half guard to the modern leg lock system. From K-guard, ashi garami and back takes become available — making this one of the more dangerous half guard positions in contemporary no-gi grappling.

The modern grappling game has made half guard a gateway to leg locks. This is why no-gi competitors increasingly use half guard as an entry point into heel hooks and knee bars.

Half Guard Passing Concepts (for the Top Player)

Understanding half guard passing makes your bottom game better. The top player wants to:

• Establish cross-face to flatten the bottom person and kill their frames
• Achieve the underhook to threaten the back
• Pressure down to prevent the bottom person from recovering to full guard
• Slide the knee out of the entanglement to achieve side control

If you're the top player and your opponent has the underhook, be careful — they're about to threaten a back take or sweep. Address the underhook immediately.

Half Guard in Competition

Half guard is one of the most common positions in competition — it happens constantly as guards get half-passed and players scramble. Having a developed half guard system means every failed pass attempt converts into an offensive opportunity rather than giving up position.

Notable competitors known for world-class half guard include Tom DeBlass, Lucas Leite, Jeff Glover, and Bernardo Faria (who built an entire black belt world championship game around deep half guard).