We found a better way to train our chickens. The trick is to make them think it's the environment or karmic justice disciplining them, not you.
Tie something scary but relatively harmless (a stick with plastic bags tied to it comes to mind) on the far end of the porch and run the rope in through a window or door that you can easily see out of but they can't necessarily see into. Then when you see the unwanted behavior (say, being on the patio) yank the string hard, dragging a suddenly moving, large loud object across the porch at terrifying speed! The chickens will freak and scatter. It DOES have to be scary enough to seem like a legitimate threat, and no being gunshy about pulling. If they think they can fake you out be staring the stick down, they need to learn that means getting hit with a stick covered in plastic bags (which should honestly be reasonably harmless). Otherwise your patio is theirs again.
Make it easy to reset by making it a two string system with the other string looped around something at the far end of the porch.
We did something similar to get two sets of new birds in a movable pen to stop fighting. :) It works well. If we heard the birds squabble we yanked a rope that caused a stick to hit the outside wall of the movable pen. It never touched a bird but it sure did shake the whole pen and spook them. They stopped fighting almost immediately.
Edited by ChocolateMouse - 6/1/16 at 10:37pm