83 questions linked to/from Things to avoid when writing challenges
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### Explaining a challenge only with test cases and examples

I have a slightly problem. I want to post a challenge (to the sandbox) about building a matrix with X pattern. The problem is that I don't know how to explain it using technical words or ...
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### Can I make a CnR with no winning criteria for Cops?

I've had two challenge ideas floating around in my head for a while. I'll spare the details but as a general overview: The first is a challenge that should, in principle, be fun but in practice it is ...
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### How to deal with an accidental chameleon challenge

What happened I was about to post Does base n have any Rotate-Left-Double numbers?. Kevin Cruijssen told me in the sandbox comment that he got a proof that significantly simplifies the problem. I ...
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### Are all golfing languages friendly to Unicode?

I'm going to make a challenge involving Mahjong Tiles (U+1F000 – U+1F02F, though I'm going to use only U+1F000 – U+1F021). ...
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### Why is this a duplicate?

Recently I asked this question: https://codegolf.stackexchange.com/questions/75040/solve-a-quadratic-expression. Seconds after I posted, it was flagged as a duplicate of Resolve quadratic equation, ...
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### What exactly should be the format for the test cases? [closed]

Working on my latest challenge, I realized that I don't know what is the optimal way of providing/formatting the test cases. So the question is, what is the best way for a challenger to provide test ...
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This question was put on hold as unclear. I thought it specifies exactly the requirements, the objective, and the winning criterion. Could somebody kindly explain what's unclear about it? update: ...
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### When should I give hints for a challenge?

If a challenge is difficult, when is it suitable to hint? (I don't think early is good, it breaks other's thought)
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### Are questions about blockchain systems good questions?

Current handling of Ethereum questions seems inconsistent (Ethereum being the second largest blockchain). This about the recent difference between Shortest code to generate a random ethereum address ...
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### Can we still ban built-ins for $\pi$?

I recently posed a challenge about computing a function of $\pi$. It was closed for being unclear and received a number of criticisms. One of the main ones I think was that banning built-ins for \\$\...
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### Kindly explain why it is not impossible to read the minds of users who voted to close a question citing “unclear what you're asking”

The users who voted to close this question Fastest algorithm to output array containing all integers in range excluding duplicate digits have left no clarification as to what is not clear to them at ...
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### Sandbox instructions for new users

We now have a nifty new info-box to point new users to the Sandbox. Hooray! But when a new user does go to the Sandbox for the first time, the instructions there don't give them much to work from to ...
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### Community FAQ for Programming Puzzles & Code Golf

Community FAQ For the Programming Puzzles & Code Golf site For official guidance from Stack Exchange, visit the Help Center. Posting Challenges/Solutions How can I incorporate good-looking ...