Triple Fold
“False” Triple Fold
Also, Mriga-Mukhasana
A shoulderstand backbends in which the legs are bent at the knee, and the knees extend to touch the floor, somewhere in the proximity of the performer's shoulders. The shins lie flat on the floor (both knees and ankles touch). The arse is above the head.
https://www.instagram.com/p/CMhq0zqsa0I/
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“True” Triple Fold
A cheststand backbends in which the legs are bent at the knee, and the knees extend to touch the floor, usually in direct contact with the shoulders. The shins lie flat on the floor (both knees and ankles touch). As a cheststand, a portion of the ribcage also is solidly lying against the floor, with only the abdomen being visible from behind. The arse is above the neck and shoulders, allowing the head to sit between the legs.
https://www.instagram.com/p/CThcGaKsfBz/
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The difference between the two is not the method of entrance - of which there are multiple ways - but which part of the torso is supporting weight.