A Master of Go – Yuji Ichikawa

A Master of Go

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Step into the gaming world with A Master of Go, one of the top $12.99 games in the App Store! Crafted with creativity and innovation by Yuji Ichikawa, this captivating Education game is bound to grab your attention. With its content rating of 4+, it caters to a wide audience. Ever since its release on 16th November 2018, it has been constantly updated, with the latest version rolled out on 7th November 2023.

Whether you have a liking for Education, Board, or Strategy games, A Master of Go is sure to keep you hooked!

User Ratings

Join the crowd of 69 gamers who have given their verdict on A Master of Go.

Ready to take on the adventure? Get A Master of Go now from the APP STORE.

Dive into A Master of Go

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!

What’s Fresh in the Latest Update?

Discover what’s new in the recent update of A Master of Go on 7th November 2023:

This is a bug-fixed version.

  1. fixed a bug that KataGo_Heavy did not start on 9×9 and 13×13 boards.

Hear from the Players – A Master of Go Reviews

Find out what gamers are saying about A Master of Go:

This app is generally great but the developers personality is problematic and makes endless stupid bugs in updates inevitable: if you report a bug, hes going to email you your personality is not comfortable for us. Isnt that creepy? This time it becomes not possible to eliminate a move by clicking it.


This app is good if you are going to play against AI or start a study game from scratch. You cannot set up a position. When you import a game it always starts with the wrong player and doesnt have an option to change players turn. These features need to be installed soon because they are very fundamental. Image recognition is also a nice-to-have feature. Now we use another app to capture a board image, then we export the sgf to another app to set the correct players turn and only after then we can start to study with this app.


We love it. You can load a SGF from anywhere and review your game without needed a powerful computer.


It’s also Bai Xian under the rules of ancient China.


We’ve been waiting for this since the Leela zero project emerged (still waiting for the chess version, but thats ok). Some improvements could be used: 1. The user interface in general can be improved. Take a hint from some of the other popular go apps. 2. If you leave the app (not necessarily closing it even) the game wipes and for some reason is copied to your clipboard so you can paste it back and resume… Clearly users shouldnt have to do that. 3. Its up to the user to load non-default network weights. Itd be nice to have those already loaded. You could make it such that theres every difficulty level from random to pro by loading specific weights. Could track users progress as well, as is done in crazy stone app. 4. Theres a dynamic Komi branch of Leela zero. Could be used for maintaining the AIs strength and still allowing high handicap games. That is all. Thank you.


As indicated in the title/subject line.


A simple app that opens SGF files from many Go apps. Fascinating and the only way iOS currently supports alpha go or ELF study. IOS 13 has made importing a problem. Im sure a fix is coming! We hope so! Our favorite study app.


We passed over 30 times while the default AI filed in its own territory. This was territory that already had about six single space eyes and not enough space to create a living group. It also tried to play inside our living territory over and over again until there was literally no legal plays inside our territory. There is no undo so get ready to waste an entire game if you happen to brush the screen at the wrong time. In fact the ONLY controls available during game play are pass and resign. You cant even change settings during play. So you cant turn sound or coordinates on or off while you are playing let alone score, analyze, or get hints. You cant load a saved game for review, you have to find some way of copying an sgf to the clipboard. They want to charge you PER MOVE for some of the analysis features!!!!!!!!!! For the price of this app, this is utterly ridiculous!

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