Fillomino Read here for instructions.
Expected difficulty Hard • Answer • Comment/E-mail if you want a solution to be published
Four years ago (okay, 45 months ago), there’s Logicsmith Exhibition, back when Grant was still active on his blog (before he migrated to Grandmaster Puzzles). Back then, I was still starting at constructing logic puzzles; you can see my submission there. Here is a “revamped” version: exactly the same layout as before, and each of 1-9 appears exactly four times as in the competition.
…okay, I just got this theme idea and toyed with it, to liven up my blog again.