Re: How difficult is this puzzle?
Thanks for this puzzle.
I've found it not so hard as I expected (according to Patrick's web: 5 stars, subjectively 4.8–4.9 or rather 4 than 6 stars
), but there are some interesting/original points that I registred, e.g. the smallest ‘14’ cage as an unlocker, some naked doubles and triples, importance of the big cage, finding the right combination in the top right corner; and one 2 × 3 unique rectangle, which can speed up the process (but here not so much).