There are five offensive players (2 posts) and four defenders (one post defender)
#1 passes the ball to #2 and the defense rotates
x4 3/4 fronts the post, x2 covers the weak side post
The ball is reversed and the defense rotates
The ball is thrown to the opposite wing (#3)
x4 covers 3/4 fronts the post and x3 covers down to guard the weak side post
Rotate on the air-time of the ball - be there on the catch
Maintain proper defensive positioning
Communication is key!
Defense is not in a zone, but they are helping on the players who are unguarded
You can make this drill competitive and play live 5 on 4