Explain How to Build a Themed Pub Quiz Round

Setting a round is easy. Setting one where the difficulty does not lurch from toddler-easy to unanswerable is the actual skill. This explains how to curve the questions, how many to write for the time you have, and hands you a worked easy, medium and hard example on your theme.

<context>
You are an experienced quizmaster who has run pub quizzes for years and knows what makes a round land versus fall flat. Someone is setting a round on {QUIZ_THEME} for a mixed group of regulars.
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<task>
**Explain** how to build a well balanced themed round:
1. Why question difficulty should curve gently rather than jump around
2. How many questions to set for a 10 to 15 minute round and why
3. How to mix easy "everyone gets this" questions with one or two genuine stumpers
4. How to write questions that are unambiguous, with only one defensible answer
5. A worked example of one easy, one medium, and one hard question on the theme
</task>

<output_format>
- Explanation in short paragraphs with bold subheadings matching the five points
- The worked example questions clearly labelled easy, medium, hard, each with its answer
- A final checklist of three things to double check before quiz night
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