Zuka's primary false reap entry from RDLR, with a strong safety point: never drop your hips outside the opponent's knee. Leads to 50/50, kneebar or saddle.
Lachlan Giles on the K-guard position itself: feet outside against a kneeling opponent, knee to the stomach, feeding the leg across to '70/30' and getting up to the back or a single leg.
A twenty-minute K-guard primer covering entries from several guards, the backside 50/50 heel hook path and the back take, plus how to deal with the common defensive reactions.