This is the thirty-third instalment of the Fortnightly Topic Challenge described here, with topics suggested and voted on here. This fortnight's topic is surface geometry (suggested by Typhon), and will span from the the 3rd of July to the 16th of July. During this period, we will compile the list of questions with this tag and post it as an answer to this question.

In the meantime, please go and propose and vote on future challenges!

Everyone have fun, and happy puzzling!

Link to other Fortnightly Topic Challenges.


For those that cannot see the deleted answer suggestion, here is how the surface geometry maze was described:

How about one where we have surface geometry mazes? I don't know the exact tags, but the challenge could be mazes that are on non-planar surfaces and/or involve transforming from one surface to another. For instance, maybe a maze on a tube where you can unroll the tube into a plane, and then roll it into a tube with the other sides. Granted, that's just an idea. We could also have hyperbolic, spherical, recursive, etc. So long as they involve non-planar surfaces they would apply.

  • $\begingroup$ I am honored to have my suggestion selected. I hope everyone has fun doing it! Funny how I went to being confused about my post being deleted to realizing it was deleted due to acceptance. :-D $\endgroup$
    – user64742
    Jul 2, 2017 at 22:29
  • $\begingroup$ I am not 100% on what this actually means, and I suggest you or someone else adds some examples like for the previous FTC. Based on the description, would this be a good example? $\endgroup$ Jul 3, 2017 at 15:53

1 Answer 1


List of all questions published as part of the Fortnightly Topic Challenge #33:

The highest-voted of these is Every Fourth Wormhole by paramesis, with a score of 26 at the end of the fortnight.

The most viewed is Every Fourth Wormhole by paramesis, with approximately 600 views during the fortnight.


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