This is a Fillomino Potpourri puzzle. Almost all of your favorite Fillomino variations that made an appearance in Fillomino-Fillia have been rolled into one. Detailed rules follow below the image.
(Click for larger size)
This is a Heyawacky puzzle.
The main issue with this puzzle is that it is absurdly susceptible to meta-logic, so I’m just going to have to remind you that you’ll miss the full solving experience if you use any.
If you’re a real master of Heyawake, try solving this without marking the squares where black cells can’t go on your first run.
Before I get to the rules and the puzzle itself, I’d like to say this first. I understand this puzzle is not for everyone, with some very complex rules and an absolutely enormous level of challenge. But if you’ve come here to enjoy puzzles, you would be missing out by avoiding this one. The solution to this puzzle is a sequence of pure logic, probably with more variety than almost any other grid-based logic puzzle there is, involving virtually no thinking ahead at all. I believe that anyone who perseveres to the end of this puzzle will feel very well rewarded for their efforts. Best of luck.
Now, puzzle 200:
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.