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Corner Divide is a bunch-based pass concept out of Shotgun Bunch Spread that isolates the backside receiver on a vertical seam while the bunch side runs a divide concept with a deep corner route and an underneath drag crossing the field. The lone receiver to the boundary runs a straight vertical clear-out, and out of the bunch you get a corner route stacked with a shallow crosser sitting underneath, while the running back releases out of the backfield on a wide flare to the flat for a checkdown outlet. This is a man beater at its core since the corner and vertical routes stress defenders with picks and leverage out of the bunch alignment, but the deep crosser also gives you a answer versus zone drops by working horizontally into soft spots. Primary read progression starts with the corner route out of the bunch, works down to the deep crossing route sitting behind the linebackers, and checks down to the running back in the flat if both are covered.
Watch cornerback alignment on the bunch side pre-snap, since tight press alignment signals man coverage and makes the corner route vulnerable to pick concepts created by the bunch formation. Key the free safety depth before the snap, because a single high safety rotating late often bites on the deep crosser and opens the corner route behind him. Post-snap, track any user-controlled defender flowing toward the bunch, since a lurking linebacker or nickel defender sitting in the throwing lane can jump the deep crossing route if the quarterback holds the ball too long. Identify if the defense is running a Cover 2 shell with corners sitting on the flats, since that alignment squeezes the corner route into a tight window and favors checking down to the running back instead. Look for zone blitz packages that drop a defensive lineman into coverage underneath, since these disguised looks can undercut the shallow crosser and force a hurried throw.
Use pre-snap motion or a quick glance at the safety alignment to identify if you are facing a two-high shell or single-high look before the snap, since the corner route thrives against single-high man coverage. If you see Cover 3 or Cover 4 with defenders sitting deep, prioritize the deep crossing route since it settles into the void between the underneath zone and the deep zone. Hot route the running back to a wide flare or check him into a stick route if you anticipate a blitz, since the bunch alignment can get congested against pressure looks. This play pairs well with Mtn Slot Hitch or Z Spot from the same set since those plays attack the flats and shallow zones, forcing defenders to widen and opening up the corner and divide routes on future snaps. Call this on second and long or third and medium situations where you need an explosive gain, since the corner route is a low-percentage but high-reward shot play against aggressive man coverage.