4 offensive players have to line up at stake of scrimmage. Three defensive players should be down linemen (in A 3 of 4-level stance). 1 linebacker might blitz on possibly facet of the center. Defensive linemen must line up no wider than shoulder to shoulder ("shading") within the offensive lineman https://leisurecityguide.wordpress.com/2024/08/29/the-thrills-and-benefits-of-indoor-football/