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On StackExchange.com we have puzzles-dedicated site https://puzzling.stackexchange.com/ and https://codegolf.stackexchange.com/ for coding puzzles, math puzzles appear on math.stackexchange.com and have their own tag there. We also have but is was used only ten times... There are nice probability-related puzzles (Xi'an often solves them on his blog), and one can easily produce multiple other such puzzles. They can be fun and they may become a nice feature of the site.

Are such puzzles on-topic on our site? They could be fun, but on another hand there are several risks:

  • the site can get flooded with puzzles,
  • homework questions may be posted as "puzzles" by lazy students who want the answer right away.

What do you think?

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    $\begingroup$ If it's a statistical puzzle, well yes, it's on-topic in my view. I wouldn't worry about being flooded, because if that was a problem it would have happened already. Nor do I see much difficulty in distinguishing puzzles from homework. $\endgroup$ – Nick Cox Nov 21 '16 at 12:09
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There's two closely related topics here that need to be disambiguated. That is, there's a difference between asking about puzzles and posing puzzles.

The Puzzling and Code Golf StackExchanges are about posing puzzles. That is, the questioner makes up a puzzle and then puts it out to the community to solve. The questioner isn't interested in finding out the answer - in many cases, they already know what it is. Instead, the point of posting the question is to see if the answerers can figure out the puzzle.

That's very different from asking about puzzles. In that situation, a puzzle is indeed part of the question, but it's the questioner who is interested in figuring out the puzzle. The goal of the answerers is not solve the puzzle (though they will likely need to do so), instead their goal is to show the questioner how the questioner could have solved the puzzle themselves. (Or understand why the correct answer is the correct answer.)

Note that the Math Stack Exchange site link you give is very clear that it's for asking about puzzles, not posing them:

This tag is meant for questions about the mathematical principles behind games, riddles, or their possible solutions. If the answer is known to you please do not use this tag to "riddle" other users, but rather to ask about the correctness of a possible solution or ways to extend and improve an existing solution.

The CV puzzle tag description is a bit more ambiguous:

Use this tag for statistical puzzles that challenge the ingenuity of the solver.

However, looking at the 10 questions currently tagged "puzzle", they're pretty much all of the asking about variety (that is, the questioner is asking about a puzzle to understand it better), and there's only one that may (or may not be - it's a bit unclear) of the posing variety (that is, the questioner is asking the question to see who is clever enough to find an answer).

These numbers confirm my general impression that - except for the Stack Exchanges which are dedicated to it - posing puzzles is not something that's generally done on Stack Exchange websites.

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    $\begingroup$ +1. I think we could use your answer to improve the excerpt of [puzzle]. $\endgroup$ – Andre Silva Nov 27 '16 at 0:28
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I remember a long time ago, organizing and disambiguating tags and with help of @whuber. Since then, the tag was not used that much, like you mentioned.

So, I'd say the risks which were listed do not apply for this specific tag.

On the other hand, the tag seems to have received more questions since then. So, maybe it is worth revising it, to see if it has been used correctly; and if not, to evaluate what to do next (for example, making a synonym of it).

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    $\begingroup$ I think that [games] and [puzzle] have different scope and shoulld not be made synonyms. $\endgroup$ – Tim Nov 22 '16 at 9:31

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