ACW@MIT-AI 08/15/80 19:27:57 Re: "Monoflips" To: CUBE-LOVERS at MIT-MC M. van der Schel has come up with a very elegant move, indeed. Easy to do, easy to think about. But he sets no records. A 22-qtw diflip was reported some time ago to this mailing list. It is true that the monoflip takes only 10 qtw. Unfortunately, this does not allow you to do a 20-qtw diflip, since the monoflip is only useful as a tranform: in other words, when accompanied by its inverse. Monoflip U Monoflip' U' still has 22 qtw. I suspect this to be a minimum. ---Wechsler