The 7-Ins passing concept pairs two of the most primitive passing concepts and puts them on the same side of the field. The Double-Ins work much the same way as Double-Slants and provide a nice single-high safety beater. The Corner route (7) paired with the outside In route works similar to a Smash concept, and creates a High-Low on near the sideline that works against most 2-high safety defenses. By putting them on the same side, you’ve simplified the amount of field that the QB is forced to read. In this way, you’ve created a delta concept toward the sideline out of two of the most standard, and effective, route concepts in modern football.
This is a concept that can be run out of any 3x1 or 3x2 formation. Depending on the defensive scheme and the match-ups that are most advantageous against the defensive look, you can run the concept from Trips
By first reading the safeties, the QB can choose to attack with the smash concept against a two-high safety, or the Double-Ins against a single-high safety.
Double-Ins is a good route concept against most single-high safety looks. Against man coverage, it works to clear out the underneath coverage, and the ins threaten the entire field off the stem (threatens vertical and can still work in and out initially), which makes it a bit easier to get inside body position on the defender. When paired with the #3 receiver running a vertical route (a Corner in this case), he helps to clear out the inside coverage.
In this way, the QB can just work inside-to-out from the #2 to the #1. If #2 beats his man inside, then the QB will peak inside to the LB level to ensure no one is sitting on that route and make the throw.
If the #2 can’t beat his man inside, he will at least clear out the coverage underneath, as the coverage must follow the #2 inside. This gives the #1 space to work underneath. Based on the coverage, the #1 receiver can run a hard dig, can sit against hang coverage, or if the offense gives the leeway, can jab inside and work back toward the sideline if the defender is cheating inside and attempting to jump the inward breaking route.
Notice that in the case of facing Cover 3, the NB will work to the outside flat, allowing the X-receiver above to win inside. The QB must then get to his next movement key to know where to throw.
If neither of these options is open, the corner route is still a viable route against man coverage if the receiver can gain outside leverage on his man. Likewise, when run near the end zone, the deep third safety will often crash down, not feeling the threat coming back outside. The corner of the end zone is a safe place to put the ball for a third and last option.
When the QB reads a two high safety look, he knows he has Cover 2, Cover 4, or possibly Cover 0. The smash concept, which combines the corner route and the dig/smash route, provides a high-low read on the outside CB.
It is essentially that the corner route is able to get outside the deep half coverage and gain outside leverage. If he can’t, he can turn back inside and threaten the seam. Regardless, the QB must be cognizant of his movement key after reading the safeties. The movement key here is the outside CB. It is imperative that the QB doesn’t throw when the CB is still in a position to sink underneath the route. Make sure the route is thrown downfield and open and not left short.
This is a very simple delta concept that forms a triangle outside the box defenders. It provides an in-out threat against a single-high safety look, and a high-low threat against a two-high safety look. Likewise, and a big reason I like the design of the play, is that is allows athletes room to win in space. By having the inside receiver run outward breaking routes and the outside receivers run inward breaking routes, it is a lot of movement a space for your athletes to win and gain leverage based on their knowledge of the play and the defense’s lack of knowledge. On top of that, each route works to clear out for another route. The corner clears the in from the #2, the in from the #2 clears for the in from the #1, and the short in from the #1 clears the corner for the #3. So this is a situation in which it pairs simple concepts, but also that the concepts work together to benefit each other.