Crucifix (from turtle)

Crucifix (from turtle) is the configuration name for the back crucifix when entered from the turtle position — the attacker captures one arm with the legs and the other with the arms from a top-of-turtle position before extending into the crucifix shape.

Etymology. The “(from turtle)” qualifier specifies the entry context: the crucifix is built from the turtle top rather than from open guard or scramble exchanges. Both entry contexts produce the same crucifix-shape control geometry but require different setup sequences.

Mechanics. With both arms isolated (one by the legs, one by the arms), the opponent loses both primary defensive limbs simultaneously — the back-exposure and submission threats follow once both arms are committed.

Cross-reference. “Rear crucifix” is the alternate name. Full mechanical coverage on Back Crucifix.