Apps by Yuji Ichikawa
A Master of Go app icon

Games

A Master of Go

Yuji Ichikawa

$6.99 4.65 · 1 storefront · 79 ratings In-app purchases unconfirmed
Open on Apple

About this app

It is a Go AI featuring a neural network of that strong, open source AI. Leela Zero, ELF OpenGo, PhoenixGo, Minigo, SAI, and optionally KataGo! You can use it as a strong opponent, and as a good teacher at the time of study. With M2 processor of iPad Pro, the playouts are performed over 650 times per second with ELF OpenGo weight v1, and with A15 Bionic processor of iPad mini, over 200 times per second! Both exceed notebook computers and is comparable to desktop computers. With M2 processor of iPad Pro, the playouts are performed over 250 times per second with KataGo b18c384nbt! Other famous weights are also included. For your information, the playout speed on the iPad Pro 9.7 inch model(A9X processor) will be about 10 times per second, and the one on the iPhone 6(A8 processor) will be about 1 time per second. I think that even so it is stronger than most amateurs, but I am sorry that patterns of misreading ladders will increase. Please be careful when considering purchasing. Enjoy it!

Latest release

What’s New

Version 7.8.0 Aug 24, 2026

This version is an improved release. 1. Updated KataGo to v1.17.1. 2. Updated KataGo_Latest to the transformer model (b11c768h12nbt3tflrs-fson-silu). 3. Changed KataGo_A14- to kata1-zhizi-b28c512nbt-muonfd2.

Audience growth

Ratings growth

Steady
7-day gain +0
Ratings / day 0.0
30-day gain +0
US rating-count history
79 ratings
79 Sep 1, 2026 · 79 ratings Sep 1, 2026

Baseline captured. Growth appears after the crawler observes a changed rating count.

Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.

Price tracking

Price intelligence

1 captured event
Current $6.99
Historical low USD 6.99
Paid → free
Price history
Current $6.99
$6.99 $3.50 Free Sep 1, 2026 · $6.99 Sep 1, 2026

First snapshot captured. The trend line starts after the next crawler price observation.

  1. First observed Sep 1, 2026 · 3:13 PM $6.99

Screenshots

A Master of Go iPhone screenshotA Master of Go iPhone screenshotA Master of Go iPhone screenshotA Master of Go iPhone screenshotA Master of Go iPhone screenshot A Master of Go iPad screenshotA Master of Go iPad screenshotA Master of Go iPad screenshotA Master of Go iPad screenshotA Master of Go iPad screenshot