# Analyze Chess Positions with Stockfish

Chess players need accurate engine guidance from FEN positions. This skill routes requests to Stockfish and explains moves, evaluations, and alternatives in plain language.

## Install

```bash
npx skillstore add ck991357/stockfish-analyzer
```

## Metadata

- Status: approved
- Slug: ck991357-stockfish-analyzer
- Version: 1.1
- Author version: 1.1
- Skillstore revision: r1
- Version status: invalid
- Tree hash: 87622418032fb450c2c7e4e33d4dd3a3f2fcaaa7cbd8e052b80040f032e11099
- Author: CK991357
- GitHub username: CK991357
- License: MIT
- Repository: https://github.com/CK991357/gemini-chat/tree/main/src/skills/stockfish\_analyzer
- Ref: dd4a3ef9f20ddf38830950b4bb713df96b431fd6
- Supported tools: Claude, Codex, Claude Code
- Audit status: complete
- Agent install advisory: allowed
- Manual install advisory: allowed
- Artifact signature: available
- Audit attestation: unavailable
- Human verification: not\_verified
- Risk factors: external\_commands
- Quality score: 78
- Quality tier: bronze
- Public page: https://skillstore.pages.dev/skills/ck991357-stockfish-analyzer
- Manifest: https://skillstore.pages.dev/api/skills/ck991357-stockfish-analyzer/manifest

## Capabilities

- Detects FEN strings in user prompts.
- Selects best-move, top-moves, or evaluation analysis based on intent.
- Requests multiple candidate moves when users ask for options.
- Explains centipawn and mate scores in plain language.
- Converts engine move notation into instructional guidance.

## Use Cases

- Study Critical Positions: Club players can paste a FEN and get a clear best move with a practical explanation.
- Prepare Training Material: Coaches can compare top moves and turn engine output into teaching points.
- Review Game Turning Points: Analysts can evaluate who stands better and why after a key move.

## Prompt Templates

### Find the Best Move

```
Analyze this FEN and tell me the best move in simple terms: [paste FEN].
```

### Compare Top Moves

```
Show the top three moves for this FEN and explain the main idea behind each: [paste FEN].
```

### Evaluate the Advantage

```
Evaluate this FEN, state which side is better, and explain the score: [paste FEN].
```

### Review a Candidate Move

```
For this FEN, compare my candidate move with the engine choice and explain the tradeoffs: [paste FEN], my move is [move].
```

## Limitations

- Requires a valid FEN position or enough context to request one.
- Depends on the configured stockfish\_analyzer tool being available.
- Does not play games or choose moves without engine output.
- Engine evaluations are guidance, not a guaranteed result.

## Best Practices

- Provide a complete FEN with side to move and castling rights.
- Ask for either one best move, several choices, or a position evaluation.
- Treat engine output as a study aid and review plans on the board.

## Anti Patterns

- Do not ask it to infer a full position from an image alone.
- Do not request self-generated moves without Stockfish analysis.
- Do not paste unrelated text and expect a valid chess evaluation.

## Security Audit

- Audited at: 2026-07-06T06:03:31.308\+00:00
- Summary: All external command alerts are false positives caused by Markdown inline code, fenced JSON examples, and FEN strings in SKILL.md. The high-entropy heuristic is also a false positive because the file is readable Markdown with Chinese text. No evidence found for prompt injection, data exfiltration, or malicious intent.

## Stats

- Views: 269
- Downloads: 10
- Favorites: 0
- Popularity score: 0