# 50/50 Guard

> A mirrored leg entanglement in which both athletes control a leg, creating battles over balance, knee line, heel exposure, and top position.

- **Canonical page:** https://www.ossmeta.com/techniques/fifty-fifty
- **Markdown:** https://www.ossmeta.com/techniques/fifty-fifty.md
- **JSON:** https://www.ossmeta.com/api/public/techniques/fifty-fifty
- **Category:** guard
- **Format:** both
- **Level:** intermediate
- **Aliases:** fifty-fifty, 50-50, outside ashi
- **Last reviewed:** 2026-07-25

## What it is

In 50/50, each athlete's inside leg passes across the other's hips while their outside legs create a figure-four-style entanglement. The position is structurally symmetrical, but grips, hip angle, and who controls the knee line determine the real advantage.

Gi competition often emphasizes sweeps and top control from 50/50, while no-gi rulesets may add heel exposure and submission exchanges. Modern variants such as backside 50/50 deliberately break the symmetry by controlling the opponent's hip from behind.

## Key principles

- Win inside hip angle instead of accepting a square, mirrored battle.
- Control the opponent's knee line while protecting your own.
- Use hand fighting to separate sweeping and submission threats.
- Understand whether the rules reward top position, permit heel hooks, or regulate reaping.

## Common entries

- **K guard:** Rotate beneath the far leg and connect your hips to its knee line.
- **De La Riva exchange:** Follow a turning opponent and weave the legs into a mutual entanglement.
- **Leg-lock counter:** Re-entangle the attacking leg to prevent clean rotational control.


## Productive next actions

- **Technical stand-up:** Off-balance, keep the leg, and rise without releasing control too early.
- **Backside control:** Rotate behind the opponent's hips to remove the mirrored alignment.
- **Leg attack:** Expose a ruleset-legal finish only after controlling the knee line and rotation.


## Defensive priorities

- **Hand fight first:** Clear dangerous upper-body controls before trying to turn the knee.
- **Hide the heel:** Maintain foot alignment and deny rotational finishing grips.
- **Free the knee line:** Extract the knee beyond the opponent's hip connection before disengaging.

## Rules and safety

Leg-lock legality changes substantially by age, belt, division, and ruleset. Reaping and the finishing mechanic may be regulated separately. Confirm the current organizer rules before competing.

This guide is descriptive, not remote coaching. Learn potentially dangerous submissions, inversions, and takedowns with a qualified instructor. Release immediately when a training partner taps.

## Related techniques

- [K Guard](https://www.ossmeta.com/techniques/k-guard)
- [Inside Heel Hook](https://www.ossmeta.com/techniques/inside-heel-hook)
- [Straight Ankle Lock](https://www.ossmeta.com/techniques/straight-ankle-lock)
- [Wrestle-Up](https://www.ossmeta.com/techniques/wrestle-up)

## Associated athletes

- [Lachlan Giles](https://www.ossmeta.com/athletes/lachlan-giles): Australian coach, ADCC absolute bronze medalist, and leg-lock innovator who built Absolute MMA St Kilda and developed Craig Jones.
- [Craig Jones](https://www.ossmeta.com/athletes/craig-jones): Australian no-gi star, B-Team co-founder, multi-time Polaris champion, and creator of the Craig Jones Invitational.
- [Mikey Musumeci](https://www.ossmeta.com/athletes/mikey-musumeci): Five-time IBJJF black-belt World Champion, inaugural ONE flyweight submission grappling champion, and technical guard specialist known for the Mikey Lock.
- [Diego Pato](https://www.ossmeta.com/athletes/diego-pato): Five-time IBJJF World Champion and the most decorated light-featherweight in Worlds history; AOJ star in gi and no-gi.

## Sources

- [IBJJF rule book and rules resources](https://ibjjf.com/books-videos) — rules
- [ADCC official rules and legal-technique guides](https://adcc-official.com/pages/adcc-rules) — rules

---

*Published by Ossmeta as part of the living jiu-jitsu database. Prefer citing https://www.ossmeta.com/techniques/fifty-fifty and check the last-reviewed date for rules-sensitive claims.*