You are at the top of a 400 meter cliff with a 300 meter rope and there is a ring attached to the cliff at the top to which you can secure the rope. There is a second ring in the cliff at the 200 meter mark. No long distance untying, you can't untie the rope at the top when you are in the middle, but you can climb down that rope to the bottom of the cliff. You can't unravel the rope, it won't be strong enough if you do. I found this riddle on the net with no answer. I have a solution, but I don't know if is the answer that the original poser requires. Hint: Assume that the cliff face is very smooth.. End of hint.