How many clues should I plant to make the mystery fair but challenging?
A good rule is: plant the solution twice. Include roughly twice as many true clues as false ones. For a 5,000-word story, aim for 8–10 total clues (5–6 true, 2–3 false). Space them throughout so readers have a chance to piece things together, but make them subtle enough that the solution isn't obvious halfway through. Test your mystery with a friend—if they solve it too early, add misdirection; if they can't solve it at all, you need more clues.
