The initial alignment is one shooter below the basket and two screener building a stack at the zone edge.

O2 tries to come out on the wing position for an open shot by utilizing the stack from player O5 and O3.

The defense will switch in this situation by defender X2 taking player O2 and defender X3 taking O3.

After shooter O2 has come out of the block, player O3 sets a screen for O5. Our defense will switch this time as well, by fronting O5 with help from X3 and defender X1 taking over O3

Proper switching against stack screen in order to prevent the pass to shooter.