since the corners are affected by the move f like f the sequence frbl does frbl that is four cycles so frbl will return the corners to their original combination ignoring twists for now for the edges frbl a cycle and a cycle the lowest common multiple lcm of a cycle and a cycle is a cycle hence the edges will be returned to their original combination by frbl ignnoring flips the lcm of a cycle and a cycle is a cycle hence m frbl moves is required to return both corners and edges to their original combination however if they do not return with the correct twists and flips haven't checked can't be bothered too much effort but i seem to remember from my now highly unreliable memory that when i actually tried this move over years ago it did twist and flip then the sequence will have to be repeated to correct this twists are cycles and flips are cycles the lcm of both is a cycle hence m frbl moves a tediously long sequence but obviously much less than a complete solution since only different positions are achieved user talk spinningspark spark '''