??? I autofilled the greens and it all fell out. Nothing harder than a unique rectangle solved it. How was this an expert?
agreed. easier than advertised.
I have a theory...As you do more and more puzzles there is a mind that works in the background and every once in awhile it pops up and says that "this square is a 2 or whatever. your frontburing mind says "wait, where did that come from" and then it has to wade back thru the thinking to confirm...and for the most part it is right. So let you inner-sudoko mind have its way.
Done with greens
Difficulty score 50. I resorted to green, but I didn't find it quite as easy as some of you. Still, not very hard.
Spellacked: how was it an expert? You answered your own question, it required a unique rectangle. All it takes for a puzzle to be rated an expert here, is for it to require 1 expert technique (or so I presume based on my observations).