We don't have a way to track a puzzle having multiple correct answers.

[gwillen]

This has come up before. Probably it should be a puzzle flag inheriting from the round by default, that a puzzle should have multiple answers; but even just something like the way rebuses work in crossword editors (by default you enter one thing, but you can force it to add more things.) Ideally a puzzle would not be marked as solved just for having one answer, if we expect multiple.

(This might go along with other answer-related features, such as recording guesses, and we could be scraping the puzzle pages for this information.)