Objective: Pick a target zone*. For every shot, pocket the OB and get CB to finish in that zone. Make sure the CB lands at least half a diamond away from the rail.
*Note: Not all zones are accessible for a given shot.
Familiarize yourself with strokes, there's often more than 1 way to land in each zone.
If it's too easy, you can break each half of the table into 9 zones (use the diamonds) instead of 4.