I usually put a socket on the starter cup nut and one on the cutting disc nut. The starter cup nut should not (I repeat) should not be as tight as the cutting disc nut. It usually works for me. Failing that there should be a hole in the top side of the fly wheel between the fins,get a number 3 Phillips head screw driver. Line the hole up with one on the ignition plate stick the screw driver in that and undo nut. Not sure about the rope idea I've always found a better way. Give those two a try.
