Controlling the inside space — between your body and the opponent's — is the fundamental battle in grappling. Inside position means your arms, legs, or frames are closer to the opponent's centre line than theirs. From inside position, you control range, deny attacks, and dictate the exchange.
The underhook is the quintessential inside position: your arm inside the opponent's arm, controlling the space between your bodies. The player with the underhook dictates the clinch — takedowns, throws, and positions all flow from it.
Double underhooks represent total inside position control. Both arms inside, controlling the opponent's torso directly. Body lock takedowns, trips, and throws are nearly unopposable from double underhooks.
From inside closed guard, the top player's posture battle is a fight for inside position. Hands on the hips (inside the guard player's legs) maintains posture; hands outside gives the guard player's legs the inside track.
The bottom half guard battle centres on the underhook: inside position for the bottom player means sweep and back-take access. If the top player gets the underhook instead, they control the inside and pass.
The collar tie controls the head from the inside, denying the opponent's posture and forward pressure. Inside head control creates the angle for snap-downs, front headlocks, and level changes.
The over-under clinch splits inside position — one underhook and one overhook each. This even split creates a neutral exchange where the player who converts their overhook to an underhook gains decisive advantage.
Butterfly guard places both feet inside the opponent's thigh line — inside position with the legs. This inside leg position creates the elevation platform for sweeps that outside foot placement cannot achieve.
The knee shield occupies the inside space between you and the passer. It is an inside position tool that denies the passer's chest-to-chest contact, maintaining a barrier that preserves the guard.
The dogfight resolves based on who wins inside position. The player with the underhook has inside position and can drive for the sweep, takedown, or back take. The player without it must pummel to survive.
This is one of 130+ principles in the app. Every principle links to its positions and submissions with transitions, entries, and exits mapped. 600+ entities on iOS.
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