“This is an example of an offensive foul for an illegal screen, with the screen being set directly behind a defensive player. The offensive player setting the back screen, Tomas Satoransky, positions himself directly behind the back of the defensive player, Kevin Huerter, without giving that defender the required one step of space. When setting a screen on a stationary opponent, who’s out of his field of vision, the screener must give the defensive player one step.”