Rolls and Reversal Mechanics
Rolls and reversals — Granby roll, inside arm roll, outside arm roll. Guard recovery mechanics from turtle and bottom positions.
Adapted from InGrappling, Rolls and Reversal Mechanics. System Games did not invent this curriculum.
When standing (Priority 1) and shooting (Priority 2) are blocked by the top player’s consolidated control, the remaining priority options are rolling-based: the granby roll (Priority 3 in the turtle hierarchy) and the inside arm roll (Priority 4). Both are guard recovery tools — they do not achieve standing, but they convert a controlled bottom position (turtle) into a neutral bottom position (seated or guard) from which the hierarchy can be reassessed.
Rolling reversals are also available in broader scramble contexts. The outside arm roll creates a reversal opportunity when the top player has established an over-hook on the near arm — it uses the top player’s control as the mechanism of the reversal rather than fighting it.
INV-12Invariant "Rotation around a fixed point creates leverage. The fixed point is the structural anchor against which rotational force is applied — the elbow brace in an armbar, the knee joint in a heel hook, the hip in a sweep. Eliminating or moving the fixed point eliminates the leverage mechanism regardless of how much rotational force is being applied."
Why it works hereIn the granby roll the posted shoulder is the fixed point and the body's mass rotates over it; in the inside and outside arm rolls the over-hooked near arm becomes the fixed point and the body rotates around the connection the opponent themselves established. The reversal does not fight the opponent's grip — it converts that grip into the fulcrum. If the bottom player loses the post or the over-hook is released early, the rotation has no anchor and collapses into a flop rather than a roll.
See full invariant page → Every roll in this section works by creating a rotational movement around a fixed point: the posted hand in the granby, the near arm in the inside and outside arm rolls. The roll generates momentum that the top player cannot stop without abandoning their own position. The fixed point is the fulcrum; the rotation is the force; the outcome is the recovery.
INV-SC04Invariant "Disconnection is a resource for both players. The player who re-connects on their own terms — choosing when and where contact resumes — holds the initiative. Forced reconnection on the opponent's terms is a loss of the scramble."
Why it works hereThe granby roll deliberately severs the top player's back-take connection and re-establishes contact from a guard-facing orientation chosen by the bottom player. The disconnection is the mechanism, not the cost — the roll is only successful because contact is broken cleanly enough that the top player cannot ride the rotation. The inside arm roll is the inverse: the bottom player keeps the connection and forces the top player to choose between releasing (losing position) or staying connected through a rotation that lands them on bottom. Either resolution is a re-connection on the bottom player's terms.
See full invariant page → The granby roll is the clearest expression of reconnect on your terms: the bottom player creates a disconnection from the top player’s back-take control and re-connects facing them from a guard position. The disconnection was chosen — the re-connection is on the bottom player’s terms (facing the opponent, at guard range, able to reassess).