Thank you hsi.chang for the great web page!

A couple of questions. First the rules page say that backtracking is not possible then it lists several exceptions. These include asia-africa and asia-pacific.

Is the following allowed?
LAX-HKG-SYD-HKG-JNB-HKG-LHR-LAX...

This involves a lot of backtracking through HKG. I would think that you would not be able to return to a continent after you've left but if the above is possible then I'm wrong.

The brochure says that you cannot retrace your steps. If they count HKG as retracing what about this itin:

LAX-NRT-SYD-HKG-JNB-MEL-LHR-LAX...
No retracing but lots of legal (?) backtracking.