Picture 1: The coach is at the top of the key with the ball. O2 sets a backscreen for O1 who cuts shoulder to shoulder off O2's screen. If there is no switch, O1 will be free underneath the basket.
Picture 2: If defender X2 switches, O1 should cut straight across the key and O2 should immediately roll to the basket to receive the pass.
Picture 3: If X1 plays too high, O1 has to use the backscreen on the opposite side. He either cuts straight to the basket.
Picture 4: Or on a switch, O1 pops to the left corner. In both cases the screener has to roll after he has set the screen.

In this drill players practice how to use a backscreen and they learn how to read the defence.

Players must be able to read the defence and react accordingly. Offensive players must use correct spacing and work to get open in the restricted area.