Basic Concepts
The most striking characteristic of the A-11 is its use of an "Emory & Henry"-style spread formation, with the players on the line of scrimmage spread across the field as if they were wide receivers. In conventional formations (including the Emory & Henry), five of these players are offensive linemen. In the A-11, however, players who play any position may be stationed across the line.
This was possible because, at the time the A-11 offense was created, a loophole existed in the high school rule books that allowed teams in a "scrimmage kick" (i.e., a punt or field goal) formation to be exempted from numbering requirements. Instead of including five offensive linemen who wear uniform numbers in a specific range and who are obviously ineligible to receive a pass, any player wearing any number can be used anywhere on the field. Since there were no restrictions concerning when the "scrimmage kick" exemption could be used or not used, the A-11 offense could be used on every down.
To use the scrimmage kick formation exemption, the player who receives the snap (presumably the kicker or placeholder) must stand at least seven yards behind the line of scrimmage. The A-11 places the quarterback in that position, which becomes a deep shotgun formation. This has the effect of reducing the need for offensive line protection since defensive players have more ground to cover before reaching the passer. The offense also places an additional passing back (similar to the wildcat offense) in the backfield next to the quarterback, creating the potential for either one to run or pass the ball.
The A-11 still must abide by rules which cap the number of eligible receivers at five (maximum six if the quarterback hands the ball off or laterals to an ineligible receiver who then passes the ball). However, it is unclear which players will be eligible until just before the snap, making pass coverage more difficult; the eligible numbered players could interchange between eligible and ineligible positions after each play. The use of eligible numbers on every player on the field, coupled with the deep position of the quarterback, forces more of the defense personnel to go into "pass defense" mode and puts less focus on run defense or pass rushing.
Read more about this topic: A-11 Offense
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