Mounted Triangle

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The mounted triangle applies the triangle choke from the top position — the attacker is above the opponent, with their legs forming a triangle around the opponent’s neck and one arm from a top-down angle. The same bilateral carotid compression that the standard guard triangle creates is achieved from the inverted perspective: one carotid is compressed by the inner thigh, the other by the opponent’s own shoulder being pushed inward by the triangle’s locked leg.

The mounted triangle is primarily an output from S-mount and high mount. When the opponent is in S-mount with one arm isolated, the attacker can swing the free leg over the opponent’s neck and lock it behind the knee of the leg that is trapping the arm — completing a triangle from above. The trapped arm is now inside the triangle, and the triangle’s compression mechanism applies in the same way as from guard, just from above.

The position solves a common problem in high-level mount — the opponent who defends the armbar by bending their arm and pulling it toward their body also brings their shoulder up. The mounted triangle captures that rising shoulder. The opponent’s armbar defence becomes the mounted triangle entry.

Unlike the guard triangle, the mounted triangle does not require hip elevation to finish — gravity and the top player’s weight create the downward pressure. The opponent cannot simply posture up to relieve the pressure as they might do against a guard triangle. The top position weight advantage makes the mounted triangle a reliable finish once it is locked.

INV-S01Invariant "All strangles require compression on both sides of the neck simultaneously. Compression on one side only creates discomfort; compression on both sides interrupts blood flow."

Why it works hereThe mounted triangle's two compression elements are the attacker's inner thigh on one carotid and the opponent's own trapped shoulder driven inward by the locked leg on the other. The vector arrives from above rather than below, but the bilateral requirement is identical to the guard triangle. A mounted triangle that wraps the neck cleanly but leaves one carotid uncovered — typically because the trapped arm is not crossed inside — applies discomfort without applying a choke.

See full invariant page → The mounted triangle’s bilateral compression mechanism is identical to the guard triangle: one inner thigh compresses one carotid, the opponent’s own shoulder (pushed inward by the triangle’s locked leg) compresses the other. The difference is the direction of application — from above rather than from below — but the two-sided compression requirement does not change. A triangle that covers the neck but leaves one carotid uncompressed does not produce the submission.