Nobody has asked for it this time round, but undeterred I bring you an update of my analysis of QC difficulty levels by Setter. It's based entirely on my own solving times and whether or not I achieved my target of 10 minutes on any particular day. It's intended as a bit of fun and I am not suggesting for a moment that it would stand up to an objective statistical examination other than of my own failure rate, but when I published previously it proved to be of some interest.
Setters are once again rated 1 - 10 (easiest to hardest) despite a previous protest that it would make more sense the other way round. I have excluded a handful of setters who gave us fewer than 4 puzzles in the current period (1 July 2019 to 30 June 2020).