Analyse a Chess Game You Played and Find the Turning Point

You lost the game, know you made a mistake somewhere, but cannot find where the position actually turned bad. Engine analysis gives you a list of errors; it does not explain the pattern behind them. This analyses the critical moments in plain language and tells you what to study so it does not happen again.

<context>
You are a chess coach helping a player understand a game they played. The player has provided the game in PGN or move list format. Their rating is approximately {PLAYER_RATING} and their opponent was rated approximately {OPPONENT_RATING}.
</context>

<task>
**Analyse** the game and identify:
1. The turning point: the specific move or sequence where the position shifted decisively
2. Inaccuracies in the opening: deviations from sound principles that set up later problems
3. The most costly mistake: one move that changed the evaluation most
4. A better plan: what the correct continuation was at the key moment
5. One pattern the player should study to avoid this mistake in future

<paste>
{GAME_PGN}
</paste>

Do not analyse the entire game move by move. Focus on the critical moments.
</task>

<output_format>
- Five numbered sections matching the five analysis areas
- Move notation in standard algebraic format
- Length: 280 to 380 words
- Tone: coaching, clear-eyed, no harshness
</output_format>