Ushiro X Pass
Ushiro X pass — deny the hip inversion, close the inside space, and defeat the cross ashi / back take dilemma from reverse X guard.
Adapted from InGrappling, Ushiro X Pass. System Games did not invent this curriculum.
FamilyGuard PassingLevelAdvancedPerspectiveTopIntentOffensiveSafetyElevatedMapView on graph →This technique has elevated risk. Make sure you've covered the prerequisites before attempting.
The ushiro X pass defeats the reverse X guard — an inverted X-guard position where the bottom player has rotated 180 degrees at the hip to face the same direction as the top player. Ushiro X is not a resting guard — it is a transitional hub that feeds cross ashi garami (inside heel hook entry) on one side and a back take on the other. The bottom player who establishes ushiro X is one short movement away from a heel hook entanglement.
The passing challenge is the two-exit dilemma. Stepping the trapped leg out to deny the cross ashi entry can open the back take angle, because the bottom player is already behind the top player’s hip line. Turning to deny the back take can feed the inside space the cross ashi needs. The top player must address the position’s core mechanism — the hip inversion and hook configuration — rather than defending one exit at a time.
The critical timing insight is that ushiro X is a dynamic transition, not a static hold. The bottom player cannot maintain it indefinitely — the hooks are not structurally stable without forward movement toward one of the exits. A top player who acts during the transition window — before the bottom player commits to cross ashi or back take — collapses the position before either threat materialises.
Ruleset contextADCC Legal Heel hooks legal throughoutIBJJF No-Gi Legal The position is legal at every belt; the heel hook finish is legal for adult brown and black belts, and illegal below that, in masters divisions, and in the giSafety First
Elevated RiskUshiro X Pass is an elevated risk technique. The top player's legs are exposed to cross ashi garami throughout the position. The primary injury mechanism is the inside heel hook — rotational force applied to the gripped heel with damage to the ACL, MCL, PCL, and meniscus possible within one to two seconds of full grip and rotation. Cross ashi has the fastest injury-to-tap timeline of any leg entanglement. A passer who does not recognise when the heel has been gripped and rotation has begun is at immediate risk. Serious injury can occur One to two seconds from full heel grip to structural damage in cross ashi..
If you are new to this technique: read this section before anything else. Understanding the danger is part of understanding the technique.
The person applying the technique is responsible for releasing immediately.