# esca

> esca — anglerfishchess-esca. Use this tool when you need to integrate chess functionality into your application, such as parsing PGN files, accessing opening books, or interacting with UCI clients. It provides a unified API for handling various chess-related tasks, including Chess960 support. Ideal for building chess-related projects, esca accepts inputs like PGN files and UCI commands, and outputs chess data and explanations.

Canonical page: https://skillsregistry.net/skills/anglerfishchess-esca  
JSON: https://api.skillsregistry.net/v1/skills/anglerfishchess-esca

## Description

Rust/Python MIT chess library: rules, facts, explanations, PGN, opening books and names, UCI client, and an MCP server over it; one API, Chess960 throughout.

## Trust

- **Trust score (0–1):** 0.87
- **Verification tier:** verified
- **Last scanned:** 2026-09-28

## Facts

- **Version:** 1.0.0
- **Skill type:** atomic
- **Execution layer:** container
- **Runtime environment:** vm
- **License:** MIT
- **Updated:** 2026-09-28

## Source

- **Source listing:** [GitHub](https://github.com/AnglerfishChess/esca)

## Use it

Resolve this record through the SkillsRegistry MCP server (no auth, read-only):

```
claude mcp add --transport http --scope user skillsregistry https://api.skillsregistry.net/mcp
```

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "get_skill",
    "arguments": {
      "slug": "anglerfishchess-esca"
    }
  }
}
```

REST: `GET https://api.skillsregistry.net/v1/skills/anglerfishchess-esca` · pull for local use: `GET https://api.skillsregistry.net/v1/skills/anglerfishchess-esca/pull`

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SkillsRegistry indexes agent skills from public registries and GitHub. Skills we have analysed are scanned with Circle-IR and scored on six dimensions; each listing states its scan coverage. More: https://skillsregistry.net/llms.txt