10th Planet half guard

10th Planet half guard is the system-attached name for the lockdown — flagging the technique’s origin in Eddie Bravo’s 10th Planet Jiu-Jitsu system, which named and codified the figure-four half-guard variant.

Etymology. “10th Planet” attaches the lineage to Bravo’s system; “half guard” specifies the position-family. The label predominates in coaching contexts that emphasise the system origin over the descriptive “lockdown” or geometric “figure-four” alternatives.

Mechanics. The lockdown’s locked-leg figure-four provides the leverage for the system’s sweep and back-attack chains — the immobilised opponent’s leg is the structural anchor against which the bottom player’s attacks complete.

Cross-reference. “Lockdown half guard” and “figure-four half guard” are alternate names. Full mechanical coverage on Lockdown.