PPCG Jeopardy: Cops

Question

How well do you know the site? Let's find out.

This is a cops-and-robbers challenge. Robber's thread.

As a cop, you need to:

1. Find a non-deleted, non-closed challenge on this site to answer. The challenge cannot have the following tags: cops-and-robbers, popularity-contest, code-trolling, underhanded, busy-beaver, king-of-the-hill, tips, answer-chaining. The challenge must have restrictions on valid output.
2. Write a valid submission for the challenge, in a free language found on Wikipedia or esolangs.org or tryitonline. The submission does not have to be competitive, only valid. EDIT: Hashing in your submission is not allowed
3. Post the submission here, keeping the challenge secret. You must post the entire submission, as well as the language (and version, if applicable).

After a week, if nobody has found the challenge you are answering, you may post the challenge that your submission is answering, at which point, your submission is safe. It is worth N points, where N is the number of upvotes on the challenge (as of 2016-11-17) (Higher is better)

To crack your challenge, a robbers need to find any challenge that the submission is a valid submission for.

Notes:

• If a challenge requires an output of X, and you output XY or YX where Y is anything besides whitespace, the submission is not valid for that challenge.
• A challenge newer than 2016-11-17 is not allowed.
• Languages newer than the hidden challenge are allowed.
• I reserve the right to ban certain challenges if they are widely applicable (could be applied to the majority of all submissions).
• Thanks to Daniel for the initial idea!

Here's a search query for valid questions.

Uncracked Submissions:

<script>site = 'meta.codegolf'; postID = 5686; isAnswer = false; QUESTION_ID = 100357;</script><script src='https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js'></script><script>jQuery(function(){var u='https://api.stackexchange.com/2.2/';if(isAnswer)u+='answers/'+postID+'?order=asc&sort=creation&site='+site+'&filter=!GeEyUcJFJeRCD';else u+='questions/'+postID+'?order=asc&sort=creation&site='+site+'&filter=!GeEyUcJFJO6t)';jQuery.get(u,function(b){function d(s){return jQuery('<textarea>').html(s).text()};function r(l){return new RegExp('<pre class="snippet-code-'+l+'\\b[^>]*><code>([\\s\\S]*?)</code></pre>')};b=b.items[0].body;var j=r('js').exec(b),c=r('css').exec(b),h=r('html').exec(b);if(c!==null)jQuery('head').append(jQuery('<style>').text(d(c[1])));if (h!==null)jQuery('body').append(d(h[1]));if(j!==null)jQuery('body').append(jQuery('<script>').text(d(j[1])))})})</script>

Answer 1

Pyke, 20 bytes, SAFE, score 59

uÄCMX67+*]mA""R`.:

Try it here!

Answer 2

Pyke, 18 bytes, SAFE, score 54

2fm}s"ab"NQlZh.&|!

Try it here!

Answer 3

Pyke, 19 bytes, SAFE, score 51

4\Y:\m+Ay""%b%y"cl2

Try it here!

Answer 4

Pyke, 42 characters, SAFE, score 85

This was probably unfair as the code stopped working in the try-it link 3 days after this answer was posted. I am happy for this answer to be non-competing

cFDhkR.dۢ㒶οd-~o@l3{IoKRKn)R+(Jt~o16q*Q|

Try it here!

Subliminal message intended towards cracker.

Answer 5

Jelly, 1 byte, cracked

Ṛ

^{Body must be at least 30 characters; you entered 15.}