It looks like the minesweeper tag has so many non-puzzle questions.
What shall I do with them?
Also, is this question fit for the "puzzling"site?
Questions about puzzles are completely acceptable for this site. (That was the original purpose of the site, in fact! We only expanded to allow questions that were themselves puzzles later on.) I don't see any particularly problematic questions in the tag, except maybe the more "brute-force search" ones.
The question you shared seems fine to me.