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Breakdown
Y Mtn Flood is a three-level flood concept run from Shotgun Wing Trips Wk Nasty with 11 personnel, and the diagram shows the backside receiver in short motion across the formation before the snap. To the flood side, the outside receiver runs a deep go route up the sideline, the TE runs a corner route to the intermediate level, and the RB releases into the flat, stacking all three levels on one side of the field. On the backside, the single receiver runs a deep go while the motion man works underneath on a shallow drag crossing the formation, giving the quarterback a check down away from the flood. The primary read progression starts with the deep corner route from the TE, then works down to the flat route from the RB, with the backside drag as the checkdown if the flood side is capped.
Defensive Reads
Pre-snap, check the safety alignment: a single high safety shaded toward the flood side signals Cover 3 or Cover 1, both of which struggle to defend the three-level flood concept. Watch the flat defender or curl-flat player after the snap, since he has to choose between sitting under the TE corner route or jumping the RB flat route, and either choice opens a throwing lane. If the defense shows two-high safeties (Cover 2 or Cover 4) before the snap, expect the deep corner route to be squeezed by a rolled-down safety, which makes the flat route and backside drag the more efficient reads. Man coverage defenses that carry the motion man across the formation with an inside linebacker are vulnerable to the shallow drag, since most linebackers cannot match the crosser's separation. This play is more difficult to execute against Cover 4 or Cover 6 shells with strong flat defenders and a deep quarter player on the flood side, since those coverages have numbers to pattern-match all three levels.
Usage Tips
Use the pre-snap motion to identify man versus zone before the snap, since a defender running with the motion man across the formation confirms man coverage and opens up the drag as a big gain option against trailing linebackers.
Against Cover 3, work the flood progression fast: high to low from the corner route to the flat, since the flat defender cannot cover both the underneath route and the sideline go route on the flood side.
This play excels on second and medium to long or third and medium when defenses are more likely to sit in zone shells expecting a shorter throw.
Pair this with Y Mtn Drive or Shuffle Smash Y Shake from the same set to keep the defense honest, since those plays hit different levels off similar formation and motion looks.
Hot route the backside go route into a comeback if you see press corners with no deep safety help, giving you a quick answer versus aggressive man coverage without needing to go through the full progression.
