It is crystal clear that we are enouraged to ask questions to which we know the answer. http://blog.stackoverflow.com/2011/07/its-ok-to-ask-and-answer-your-own-questions/ However, it is much less clear what is the case with puzzles. Why should I not ask questions regarding puzzles on Stack Overflow? http://meta.stackoverflow.com/questions/25437/posting-programming-algorithmic-puzzles-on-stack-overflow
So what is the verdict?
Also, I wonder if it occured to people to support puzzles with simple extra features. Ideally a puzzle would be a question with expiry date (like a bounty) but crucially, answers would only be revealed to the OP, or to users who opt out of submitting an answer. After the deadline passes, answers are revealed and correct answer revealed.