The guard blocks PS A-gap. If the 3 tech comes into the A gap he will be blocked or washed down and it becomes a keep, if not the guard will climb to 2nd level. The only way it is a predetermined keep is if the DT is a 1 tech.
I think I get this, and thanks for posting. Is this right?
1) Midline lead will attack, typically veer, the 3-tech (in the play posted above, Gotsis looks like a 1-tech but Green kind of does too, 2-Tech?) Anyway, in this case, Green is the playside DT.
2) Green attacks the A-Gap, so, by scheme, the guard can't veer him but down-blocks him.
3) The B-Back changes his dive path from midline to become another lead blocker while the trailing A-Back, Days, also folds up as a lead blocker per midline lead.
Am I close?