I saw the picture from this weeks problem and was instantly super excited. But I didnt really look at the problem much until this evening.
Then after trying to force the problem into an unnecessary inversion for over an hour.
I let out a sigh of disappointment, gave up on overkill, and dropped a perpendicular.
Two steps later it was done and I still wish it had at least hinted at inversion as more than just a teaser.