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Updated 1mo ago

by brumar

chess-postmortem-skills

Claude Code skills for chess post-mortems: Stockfish-backed annotated PGN, HTML viewer, narrated video

Works with
  • Claude
View on GitHub (opens in a new tab)

76 GitHub stars (76)

+8 in 30 days

Stars gained per day · daily snapshots since Sep 30
Stars gained per day, Sep 30 to Nov 5: +11 in total; the busiest day was Oct 22 with +3 stars.Oct 1: 0 starsOct 2: +2 starsOct 3: 0 starsOct 4: +1 starsOct 5: 0 starsOct 6: 0 starsOct 7: 0 starsOct 8: 0 starsOct 9: +1 starsOct 10: 0 starsOct 11: 0 starsOct 12: 0 starsOct 13: +2 starsOct 14: 0 starsOct 15: 0 starsOct 16: 0 starsOct 17: 0 starsOct 18: 0 starsOct 19: +1 starsOct 20: 0 starsOct 21: 0 starsOct 22: +3 starsOct 23: 0 starsOct 24: 0 starsOct 25: 0 starsOct 26: 0 starsOct 27: 0 starsOct 28: 0 starsOct 29: 0 starsOct 30: 0 starsOct 31: 0 starsNov 1: 0 starsNov 2: 0 starsNov 3: +1 starsNov 4: 0 starsNov 5: 0 stars
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  • 4 skills (4 skills found in its SKILL.md files)
  • 1 forks (1 forks)
  • 1mo ago last update (Last updated 1mo ago)

Install

Skills CLI

npx skills add brumar/chess-postmortem-skills

Asks which skills and agents to install. Just one: npx skills add brumar/chess-postmortem-skills --skill chess-analysis — add -g for every project.

Claude Code

git clone https://github.com/brumar/chess-postmortem-skillscp -r "chess-postmortem-skills/skills/chess-analysis" ~/.claude/skills/

Copies the chess-analysis skill into ~/.claude/skills/ for every project (use .claude/skills/ for one project). Repeat for the other skills listed below.

Plugin

/plugin marketplace add brumar/chess-postmortem-skills

Run inside Claude Code if the repository ships a plugin marketplace, then pick plugins from /plugin.

Skills can run code on your machine — read the SKILL.md first.

What it does

In the author's own words, from each skill's SKILL.md.

  • chess-analysis

    Engine post-mortem of a chess game producing a deeply annotated PGN. Runs a Stockfish eval sweep, then interrogates the engine with "naive questions" (via parallel investigator subagents) until every mistake and every complex engine move is genuinely explained, and writes layered annotations (short notes on ordinary moves, deep dives on 0.3+ pawn errors). Use whenever the user asks to analyze/rev…

    skills/chess-analysis/SKILL.md on GitHub (opens in a new tab)

  • chess-play

    Play a chess game against the user over PGN files with the board rendered to images that Claude reads with vision. Use this whenever the user wants to play chess, sends a chess move in any notation (e4, Cf3, Nf3, "knight takes", O-O...), asks to continue an existing game in chess-games/, or says things like "your move", "lets play", "new game". Also use it mid-conversation when a lone chess move…

    skills/chess-play/SKILL.md on GitHub (opens in a new tab)

  • chess-position

    Deep study of ONE chess position (a FEN, a screenshot, a diagram, or "move N of game X"), not a whole game. First asks the user whether they want a POSITIONAL analysis (structure, plans for both sides, where each piece belongs) or a TACTICAL one (forcing lines, what works and what fails), then investigates with Stockfish as a fact-checker and explains the position in human terms. Optionally ends…

    skills/chess-position/SKILL.md on GitHub (opens in a new tab)

  • chess-video

    Produce a narrated video post-mortem of an analyzed chess game (stage 3), plus an interactive HTML viewer of the full annotations. Builds on the chess-analysis skill's outputs (annotated PGN + eval sweep) — runs that skill first if they don't exist. The video shows the whole game move by move with commentary arrows, a vertical eval gauge, a running move list, piper TTS narration and burned-in sub…

    skills/chess-video/SKILL.md on GitHub (opens in a new tab)

Review before you install

A skill is a set of instructions and scripts your agent will follow, and it can run code on your machine. Read the SKILL.md and any scripts first — this listing is not a security review.