RuleStack
The daily puzzle of deduction and logic.
RuleStack launched on June 21, 2026 with 5 votes, #2,466 of 22,647 launches that month and more than 75% of that year's launches.
What it does
RuleStack is a daily logic puzzle built around deduction and ordering. There is one puzzle each day. You must arrange blocks so that all provided rules are satisfied. There is only one correct solution. - Quick enough to complete in < 2 minutes. - No account required to play - One shared challenge for all players - Streak tracking Today is RuleStack #1 - the very first puzzle. I'd love feedback from puzzle fans, makers, and anyone who enjoys daily brain teasers.
"Between" means anywhere in the gap, not necessarily touching both letters. "Exactly 3 places from" means the two positions differ by 3, so 1 place from would mean adjacent. "Between" means anywhere in the gap, not necessarily touching bothfrom rulestack.net
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Hey HN, About twenty years ago, while I was in college, I first stumbled upon James Propp's Self-Referential Aptitude Test [1] and absolutely loved it. Ever since then, I've had this idea of turning that concept into a daily game, and I've finally built it: https://www.logiquiz.com/ The game interface checks each question against the answers you've given, so it doesn't spoil anything by giving away the answers. There are five different tests each day, from very easy to very hard. I'd love to hear what you think! [1]: https://faculty.uml.edu/jpropp/srat-Q.txt
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