Chess Postmortem Skills - Claude Code analysis for your chess games

Show HN: A Claude Code skill to analyze your chess games

Chess Postmortem Skills is a set of Claude Code skills that turn your chess games into readable post-mortems. It runs a Stockfish sweep, then uses AI investigators to ask the engine human-like questions until every mistake is explained. You get a plain-language annotated PGN, a standalone HTML analysis board, and even a narrated video of the whole game. The magic happens when you provide your own think-aloud recording or notes: Claude transcribes and aligns them to your moves, so the analysis refutes your actual reasoning. Ideal for slow or rapid games where you want to learn, not just see where the eval bar dropped.

With your thoughts, you get a review of your reasoning: which fears were justified, which plans were sound, which questions you asked yourself and what the answer was.

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2026-09-26