4 offensive gamers have to line up at stake of scrimmage. 3 defensive players has to be down linemen (in A 3 of 4-level stance). A person linebacker could blitz on either side of the middle. Defensive linemen will have to line up no broader than shoulder to shoulder ("shading") https://leisurecityguide.wordpress.com/2024/08/29/the-thrills-and-benefits-of-indoor-football/