This is the third installment of the Fortnightly Topic Challenges Rerun described here and the thirty-seventh installment of the FTCs overall, with topics suggested and voted on here. This fortnight's topic is "Rare and Endangered" (suggested by Alconja) and will span from the 9th of July to the 22nd of July. During this period, we will compile the list of questions with a relevant title 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.

The Rare and Endangered topic challenge does not have a single specific tag associated. Due to the nature of this challenge, please add your own questions to the list below. The suggestion is copied to this post for posterity.

Rare and Endangered

Make a puzzle using at least two tags that are not in the top 50 tags on the site.

I.e. you're trying to make a puzzle whose two primary tags are not any of the following*: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,


  1. The two "rare" tags should represent the primary tags of the puzzle, though you can include other tags (including ones from the top 50) as necessary
  2. The live top 50 may vary over time. For the purposes of this challenge, the exact list was locked at the start of the fortnight and explicitly stated above.
  • $\begingroup$ Are you allowed to submit multiple entries, or just one? $\endgroup$
    – Mr Pie
    Commented Jul 11, 2018 at 7:55
  • 1
    $\begingroup$ @user477343 You can submit multiple $\endgroup$
    – Sensoray
    Commented Jul 11, 2018 at 14:49

1 Answer 1


List of all questions published as part of the Fortnightly Topic Challenge #37:

The highest voted puzzle is An Amazing Nonogram by dcfyj, with a score of 13 at the end of the fortnight.

The most viewed puzzle is $\verb|Eight Circles|$ by user477343, with approximately 520 views during the fortnight.

  • 5
    $\begingroup$ This should probably be changed to a Community Wiki $\endgroup$ Commented Jul 9, 2018 at 15:16
  • 1
    $\begingroup$ Oops, you're right. Completely slipped my mind when making the post; that's fixed now. $\endgroup$ Commented Jul 9, 2018 at 17:21

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