These puzzles have been set by the experts at GCHQ. The difficulty levels are gauged using the Enigma Rotor Scale, which you can find described at https://www.gchq.gov.uk/information/enigma-rotor-scale Very easy. Should be quickly solvable.  Not too hard but not immediately obvious. You probably need to make a cup of tea for this one. Coffee works too.  Getting a bit hard now. Tea drinking will help, but a bit of pacing around the room is probably in order as well.  Something of … Continue reading GCHQ Puzzle Challenge