This question is part of the best-puzzle award series.

What are your nominations for the best puzzles, here on Puzzling.SE, of the second quarter ( April / May / June) 2021?

Suggested guidelines for nomination:

  • Nominate each individual puzzle in a separate answer, so they can be upvoted/downvoted separately.

  • No more than 3 nominations per person.

  • Don't nominate your own puzzles.

  • Before you nominate a puzzle, check to see if someone else has already nominated it. If they have, then add to that nomination as a comment (or edit it) instead of nominating the same puzzle again.

  • In your nomination, explain what it is that (in your opinion) makes the nominated puzzle such a good one.

Some lists to help jog your memory (your nomination doesn't have to be from these lists):

Algorithmically selected "best of":

Best by votes/views:

Meta-meta issues:

Q: Is this kind of thing allowed on SE?
A: Yes, Photography SE and Sci-fi/Fantasy SE do something very similar.

Q: What's the point?
A1: To highlight and encourage good practice in a way that goes beyond upvotes.
A2: To work towards building a 'hall of fame' of some of the best puzzles on the site (perhaps to reside on a future puzzling.SE blog) - think of it as our 'greatest hits album'.
A3: To prompt members to put forward their own reflections on what makes a high-quality puzzle.


2 Answers 2


R᠎e᠎d᠎u᠎n᠎d᠎ancy by noneuclideanisms

At the time this was solved, I commented:

Wow. This puzzle is incredible - never seen anything that uses ambigrams in this way before! Brilliant solve too - very well done :)

I wasn't the only one to exude about it:

Incredible puzzle! - Matthew Jensen

This is an incredibly clever puzzle! If I hadn’t joined this stack already I’d join it just to upvote this. - Fivesideddice

Wow what a superb puzzle! That must have taken hours to make. - Dmitry Kamenetsky

(and more...)

These comments speak for themselves (and you should definitely go check out this puzzle if you haven't already). It's a wonderful visual puzzle whose secret lies in the world of ambigrams and visual 'redundancy' (hence the title). With beautifully-crafted visuals this cleverly-devised teaser is a puzzle that once you come across it, you won't forget it in a hurry.

Bold, inventive and memorable. Fantastic.

  • $\begingroup$ That puzzle was 20/20!!! $\endgroup$
    – Avi
    Commented Sep 26, 2021 at 1:37

A Puzzling Easter Egg Hunt By Stiv

First of all, I have to say, Stiv has made some memorable puzzles on this site, like his Puzzle Type Needs A Name Extreme Edition puzzle. That itself was cool, but I think he's done something extra: Making a puzzle from C4s! He himself admitted that he never thought of making a hidden puzzle in the C4 until he saw the record breaking C4 by Sp3000 (link is in the link). I must say, that puzzle was challenging, mind-bending, and overall, Incredible.


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