pachi ☆

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Description:
Software for the Board Game of Go/Weiqi/Baduk

Type: Formula | Tracked Since: Dec 28, 2025

Links: Homepage | formulae.brew.sh

Category: Other

Tags: go board-game ai game-engine baduk

Install: brew install pachi

About:
Pachi is a open-source engine for the game of Go, designed to be a strong and flexible playing opponent. It supports various board sizes and rulesets, making it suitable for both casual play and serious study. The engine is optimized for performance and can be integrated into other Go applications via its API.

Key Features:

Strong AI opponent with adjustable strength
Supports multiple board sizes and rulesets (AGA, Chinese, Japanese)
Can be used as a library for other Go applications
Open source and extensible

Use Cases:

Playing Go against a computer opponent
Analyzing Go game records and positions
Developing custom Go applications using the Pachi engine

Alternatives:

Leela Zero – Neural network based engine, generally stronger but requires more computational resources.
GNU Go – Older open-source engine, historically significant but generally weaker than modern engines like Pachi.

Version History

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