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/review/annotate a game, find their mistakes, run a post-mortem or "stage 2", asks "where did I go wrong", or after a game played with the chess-play skill ends. Also for analyzing any PGN file the user provides. If the user recorded themselves thinking aloud during the game (a voice memo / mp3 alongside the game), this skill also covers transcribing it locally, clock-aligning it to the moves, and weaving the player's actual beliefs into the annotations.
Security AStatic scan found no risk patternsHow grading works ›
From the source SKILL.md
Goal: an annotated PGN a human learns from. An eval number is not an explanation — the deliverable is the why, verified against the engine and against your own eyes (render positions, look at them).
What this skill does
Chess Analysis is a community-contributed Claude Code skill in the operations sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/chess-analysis/ and loads when your prompt matches the skill's trigger.
When to invoke it: Use whenever the user asks to analyze/review/annotate a game, find their mistakes, run a post-mortem or "stage 2", asks "where did I go wrong", or after a game played with the chess-play skill ends. Also for analyzing any PGN file the user provides.
Who uses this skill
The Chess Analysis Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).
How to install
Free
Manual install (2 steps)
mkdir -p ~/.claude/skills/chess-analysis
curl -L https://claudskills.com/skills/chess-analysis/SKILL.md \
-o ~/.claude/skills/chess-analysis/SKILL.md
Or just download SKILL.md directly and drop it into ~/.claude/skills/chess-analysis/. Claude Code auto-discovers it on next session.
Skills live at ~/.claude/skills/chess-analysis/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\chess-analysis\SKILL.md on Windows. See the full install guide for step-by-step instructions.
Telegram
📱 Install from your phone or desktop Telegram
Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →
Pro
One-click install via the desktop app
The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.
Pro
For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.
Frequently asked questions
How do I install the Chess Analysis Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy
SKILL.md from the source repository to
~/.claude/skills/chess-analysis/SKILL.md and restart Claude Code. Both flows are detailed at
claudskills.com/install/.
What does the Chess Analysis skill do?
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/review/annotate a game, find their mistakes, run a post-mortem or "stage 2", asks "where did I go wrong", or after a game played with the chess-play skill ends. Also for analyzing any PGN file the user provides. If the user recorded themselves thinking aloud during the game (a voice memo / mp3 alongside the game), this skill also covers transcribing it locally, clock-aligning it to the moves, and weaving the player's actual beliefs into the annotations.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Chess Analysis skill?
Use Chess Analysis when your Claude Code task falls under the General category — specifically in the operations area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Chess Analysis" or describe the task and let Claude pick). Browse related skills at
/category/general/.
What is a Claude Code skill and how does the Chess Analysis skill fit in?
A Claude Code skill is a
SKILL.md file that lives under
~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Chess Analysis is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at
/learn/what-is-a-claude-skill/.
Attribution & license
Cite this skill
If you reference this skill in a blog post, paper, or documentation, you can cite it as:
APA
brumar. (2026). Chess Analysis [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/chess-analysis/
BibTeX
@misc{chess-analysis-2026,
author = {brumar},
title = {Chess Analysis [Claude Code skill]},
year = {2026},
publisher = {ClaudSkills},
url = {https://claudskills.com/skills/chess-analysis/}
}Embed this skill
Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →
Badge
[](https://claudskills.com/skills/chess-analysis/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)
<script>
<script src="https://claudskills.com/embed/chess-analysis.js" async></script>
<iframe>
<iframe src="https://claudskills.com/embed/chess-analysis.html" width="100%" height="160" frameborder="0" loading="lazy" title="ClaudSkills: Chess Analysis"></iframe>
Security scan
Grade A · scanned 2026-09-28 — free static scan against the OWASP Agentic Skills Top 10.
No risk patterns were found in any of the ten OWASP-aligned categories. How grading works ›
- ✓ Prompt injection
- ✓ Data exfiltration
- ✓ Supply chain
- ✓ Reverse shell
- ✓ Credentials
- ✓ Execution
- ✓ Filesystem
- ✓ Persistence
- ✓ Obfuscation
- ✓ Network
Show this grade on your repo (click to copy):
[](https://claudskills.com/skills/chess-analysis/#security)
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