Double Underhooks
Double underhooks give the most hip control of any clinch position — both arms under the opponent's, both hips accessible.
Adapted from InGrappling, Double Underhooks. System Games did not invent this curriculum.
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Double underhooks — both arms under the opponent’s arms, reaching toward their back — represent the most complete clinch control available from the front. Both hips are accessible, both arms are controlled, and the practitioner can steer the opponent in any direction. The position is the clinch equivalent of having back control: highly dominant, but arrived at through a process (the pummel) that has its own vulnerabilities.
Double underhooks are the product of winning the pummel — converting from the over-under by threading the overhook arm under the opponent’s and establishing a second underhook before the opponent can counter. The transition from over-under to double underhooks is the central skill of clinch pummeling.
From double underhooks, the primary entries are the front body lock (closing and locking hands around the torso) and the direct double leg (dropping under the opponent’s underhook counter). The position is strong but not permanent — the opponent will attempt to pummel out or establish a front headlock counter immediately.
INV-11Invariant "The side of the body with the underhook controls the hip on that side. Hip control determines directional movement."
Why it works hereDouble underhooks apply INV-11 bilaterally — both hips controlled, both directions of movement available. The opponent cannot predict which side the attack comes from because both sides are simultaneously compromised, and they cannot rebalance toward either hip without meeting an underhook already there. The position's dominance comes from this symmetry: one underhook controls one hip; two underhooks control the entire frontal base.
See full invariant page → Double underhooks give bilateral hip control. The practitioner can drive either hip, pull either direction, and execute takedowns to either side. This is why double underhooks are the superior clinch position — the opponent cannot predict which direction the attack will come from, and both hips are compromised simultaneously.
INV-ST02Invariant "Hip access is the functional goal of all single-leg attacks. Controlling the leg without accessing the hip allows the opponent to sprawl and recover."