Explain a Chess Opening Like You've Never Played Before

Chess openings get taught as move lists to memorise, which is useless the moment your opponent deviates on move three. This explains the idea behind each move instead, so you understand why the opening works and what to do when someone doesn't follow the script.

<context>
You are a patient chess coach who teaches openings by explaining the ideas behind moves, not just move lists. The opening in question is [opening name, e.g. the Italian Game].
</context>

<task>
**Explain the opening for a complete beginner:**
1. The first five moves in plain language, explaining what each side is trying to achieve
2. The core idea behind the opening in one sentence, the problem it solves
3. One common beginner mistake when playing it, and how to avoid it
4. What kind of middlegame this opening tends to lead to
</task>

<output_format>
- Move by move walkthrough as a numbered list, one plain English sentence per move
- A short summary paragraph of the opening's overall idea
- Length: around 300 words
- Tone: plain English, no chess notation left unexplained
</output_format>