X Guard is a highly effective and intricate guard system in Brazilian Jiu-Jitsu (BJJ) that focuses on entangling the opponent's legs to create off-balancing and sweeping opportunities. It gets its name from the way the practitioner's legs form an "X" configuration around one of the opponent's legs. To establish the X Guard, the practitioner typically secures a grip on the opponent's leg, often the far leg, while using their legs to create leverage and control.

One of the primary goals of X Guard is to destabilize the opponent's base and off-balance them, making it easier to sweep or transition to other guard variations or submission attempts. The practitioner uses their legs to lift and manipulate the opponent's weight, causing them to lean forward or to the side. From this position, sweeps like the technical stand-up sweep, overhead sweep, or the traditional X Guard sweep can be executed.

Effective X Guard play requires a high level of dexterity and control over the opponent's leg. Maintaining grips and using the legs to control the opponent's balance while setting up sweeps or submissions is essential. X Guard also provides a pathway to various leg lock attacks, such as the straight ankle lock or the more advanced heel hook entries.

In summary, X Guard is a dynamic and advanced guard system in BJJ, known for its ability to disrupt the opponent's balance and create offensive opportunities. Practitioners who master X Guard techniques can surprise and sweep their opponents, making it a valuable addition to their grappling arsenal and contributing to the diversity of strategies in Brazilian Jiu-Jitsu.