A Master of Go

Name: A Master of Go
Price: 1200 USD
Rating: 4.6 (854 reviews)
Author: Yuji Ichikawa

By: Yuji Ichikawa

Features & Capabilities

A Master of Go is a Go AI featuring a neural network built from leading open-source engines such as Leela Zero, ELF OpenGo, PhoenixGo, Minigo, SAI, and KataGo. It can be used as a strong opponent and a patient teacher for study.

Performance notes: On devices like the iPad Pro with M2, playouts exceed 650 per second using ELF OpenGo weight v1; on the iPad mini with A15 Bionic, over 200 per second. With the M2 iPad Pro, KataGo weight b18c384nbt offers about 250 per second. Additional weights are included. On older devices (iPad Pro 9.7 with A9X ~10/s; iPhone 6 with A8 ~1/s), speeds are much slower. The extension is typically stronger than many amateurs, but ladder-reading patterns may cause misreads; please consider this when evaluating purchase decisions. Enjoy it!

User Growth & Download Statistics

App AI Games Open Source Education

By:

Yuji Ichikawa

Rating:

4.60

(854) 4 new ratings

Version:

7.6.0 Last updated: 2026-04-04

Version code:

884083655

Creation date:

2018-11-16

Compatible devices:

Size:

404.47MB

Price:

1200

URLs:

Website ,Privacy policy

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-06-06

Compare stats and ranking:

Ranking

# 62,852 ▲ 157

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Apple app. Please use these information below to contact the Apple app developer.

Developed by:

Yuji Ichikawa

Apple Apps Store

https://apps.apple.com/jp/app/a-master-of-go/id1442035374?l=en-US

Website:

https://new3rs.github.io/a_master_of_go/index.html

User Reviews

Users praise the app for strong KataGo integration and SGF-focused study on iOS, especially the ability to load SGFs from various sources and study without a powerful computer. However, they repeatedly encounter limited in-game controls, difficulty setting up positions or correct turns on import, and inconvenient save/load via clipboard, with overall UI/UX improvements desired.

Pros

Strong KataGo integration on iOS, providing solid learning and analysis capabilities.
Open SGF support from multiple Go apps, enabling easy study workflows.
You can review SGF games without needing a powerful computer.

Cons

Limited in-game controls with no undo; only pass and resign; no mid-game setting changes.
Cannot set up custom positions and import can start with the wrong player's turn; fundamental feature missing.
Saving/loading is cumbersome: you must copy SGFs to the clipboard and there is no in-app save/load workflow.

Recent reviews

The app works perfectly. keep in mind, you CAN play with japanese rules against 20 kyu human-like katago model, however you can only do this on 19x19 board after first purchasing the katago model, and THEN the human like model. the app is great and the developer is VERY responsive and helpful.