Ask HN: Is there a daily puzzle where the rules of the puzzle change every day?

Do you mean something like the Cracking the Cryptic channel on YouTube?

It features a couple of puzzles every day, with a variety of different rulesets.

I’d personally love something like this. A year ago, I got hooked on Notpron and The Codex of Alchemical Engineering, and what really pulled me in was the evolving logic. Every level challenged a new way of thinking. Since then, I’ve sought out games and puzzles that train lateral thinking, not just pattern recognition. I’d definitely subscribe if you built it.