Larry Camejo wrote:
From my understanding however, our pins were designed to hold the attacker in position long enough to end the conflict using a strike or a weapon, not to hold them indefinitely as if in a Judo match.
Aikido pins offer the mobility to quickly finish or disengage if needed to deal with other potential multiple threats, they are not the same as ne waza pins where one sacrifices ones footing and standing mobility to maintain positional dominance imho. Keeping ones vertical balance is a key principle of Aikido imho.
Probably should have ended the thread.
Any determined opponent can escape from the shiho nage "pin."
I wouldn't worry about total immobilization. All you have to do is hold them there long enough to take their weapon, or cut their throat, or both.
The face down pins, while somewhat more stable, are much harder to get, but they are the only effective way to ensure your opponent doesn't use a weapon in his off hand to kill, or at least, surprise you.
Kesa gatame can't do that. Side control can't do that. Mount can't do that. Neither can most versions of rear mount.