According to the about page, “sundays will be anything from hard to ridiculous; the only limit is that there is a logical solution with minimal thinking ahead.” Well, this one has a logical solution… but it takes the word ridiculous and goes to the sun with it, maybe to the point of being unreasonably hard. Puzzle 100, the 100 by 100 Akari, is a cakewalk in comparison.
Best of luck to anyone brave enough to tackle this one. And don’t worry, there won’t be another puzzle at this level for a long time, if ever.
1/31 4:11pm ET: Fix made to top right to eliminate a trivial ambiguity. Also, if you need a hint, feel free to check some of the comments.