# Champion Go

> Go game application with AI engine, challenges, and game analysis features. (iPhone/iPad app by UNBALANCE Corporation.)

- Source: https://appshunter.io/ios/app/champion-go/id474441668 (this page in markdown: same URL + `.md`)
- Developer: [UNBALANCE Corporation](https://appshunter.io/developer/358617691)
- Category: Games, Board
- Price: $5.99 with in-app purchases (on sale, was $6.99)
- Rating: 5.00/5 from 1 App Store ratings · 22 written reviews indexed
- Age rating: 4+
- Requires: iOS 5.1.1 · 56 MB
- Languages: American English, Japanese, Korean
- Released: 2019-06-29
- Data updated: 2026-09-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/champion-go/id474441668/reviews.md

## What is Champion Go?

Crazy Stone is a popularly known Go engine, based on the Monte-Carlo evaluation technique,
combined with tree search, and has achieved 6d at KGS rating.
We have optimized this particular version for the iPhone and the strength is from beginner level
to around 1d.

Champion Go is a Go application from beginner to expert!

We have also provided 'Engine Server Game' mode (playing tickets are required).
In this mode, you can play games against the latest Deep Learning version of Crazy Stone
which is installed in our computer server. Therefore you can enjoy online games against a very strong computer program.

■ Medal challenge mode
Champion Go has 2 game modes, Normal game & Medal challenge.
In Medal challenge, there are 150 different levels of play
set by combination of COM level, handicap & board size.

You can win medals by defeating computer under the specified conditions.
Why don't you challenge to collect all the medals!

■ Engine Server Game
(Playing tickets are required for these games)
There are 12 levels of play for each 9x9,13x13,19x19 board size.
If you want to play against the one of the stongest computer programs,
please enjoy online games against our Go Server Engine.

Crazy Stone has made a huge step forward by combining Deep Neural Networks with Monte Carlo Tree Search.
The new program has scored a winning rate of over 90% against the previous version!

We have upgraded our Go Engine Server to this latest version, and now you can play games against Crazy Stone
that has achieved 7d on kgs rating.
(We have provided a 8 core engine server for these games)

■ Friendly 3 input methods
There are 3 options of input methods (Zoom, Cursor & Touch).

■ Helpful Game record features
You can view full game history in the game record and restart game from the selected move,
which should help reviewing your game.
Various Game record features should be practical for improving your Go.

■ Other Features
・Human vs Computer, Human vs Human(sharing a single device)
・3 types of board size (9x9,13x13,19x19)
・Handicap games, variable options of komi
・Hint (suggest)
・Instant Undo (available even when the computer is thinking)
・Automatic territory calculation
・Suspend/Re-start (in game)
・Save/Load game record
・Send game record (sgf-file) by e-mail
・Automatic and manual replay of a game record
・Byoyomi(time limit) settings (only for human)
・Atari warning
・Highlight the last move
・COM resign feature

※In medal challenge mode, some features related with game record and hints are not available.
Also Undo is limited to the recent move you made (2 consecutive Undos can not be made).

■ Subscription Details
-Monthly Subscription for unlimited Engine Server Games ($2.99/month).
-Customers will be charged $2.99 per month to iTunes Account after the free trial period of 7 days.
-The Subscription will be renewed automatically unless cancelled more than 24 hours before the end of it's current period.
-Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal.
-To turn-off the auto renewal of subscription, please touch the Confirm Subscription button. You will be able to cancel your subscription from your iTunes account settings. 
-Also, you will be able to confirm your subscriptions with your device by following the steps listed below.
Settings -> iTunes & Apple Store -> Apple ID -> Subscriptions
-After cancelling the subscription, you will be able to play Engine Server Games until the current subscription period expires.
-You will not be able to cancel the current subscription during its active period.
-Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication.
-Privacy Policy  (https://sp.unbalance.co.jp/privacy/sp.html)
-Terms of Use  (https://sp.unbalance.co.jp/eula/en.html)

## Key features

- Medal challenge mode with 150 levels
- Engine Server Game against Deep Learning AI
- Human vs Computer and Human vs Human modes
- Multiple input methods (Zoom, Cursor, Touch)
- Detailed game record features for review
- Three board sizes (9x9, 13x13, 19x19)

## Pricing and in-app purchases

Base price: $5.99.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Subscription (Monthly) | $2.99 | per month |


## Recent user reviews (10 of 22)

All indexed reviews: https://appshunter.io/ios/app/champion-go/id474441668/reviews.md

### 1/5 — コンピュータの打つスピードの調節ができない

*2026-04-15*

瞬時に打ち返してくるのは早すぎなので、調節できるようにしてほしい。

### 3/5 — 리뷰

*2024-11-09*

무슨기보를불러오라는데어떻게하는지몰르겠어요

### 3/5 — 전에 구매 했는데 구매 내역이 없어서 다시 결재를 했네요 ㅡ..ㅡ

*2022-10-23*

오래전에 구매 했는데…
결제 내역 없어져서 리뷰 남길려고 다운 받았네요 ㅡ.ㅡ

### 4/5 — 良いアプリだと思いますが…

*2016-08-23*

外部から棋譜が読み込めないのが残念です。これが出来れば、まさに最強の囲碁アプリ。有料オプションでも良いから是非付けて下さい！

### 5/5 — コンピュータは疲れない

*2016-05-26*

コンピュータは連戦しても疲れないみたいです。私はとても疲れます。勝った時はあまり疲れないのですが。

### 1/5 — エラー

*2015-05-17*

サーバー対局をすると、16手目で《エラー3》というのが出てきて、それ以上動きません。お金を払っている以上、速やかに対処して下さい。
時間がかかるのであれば、返金して下さい。

### 5/5 — 今までで最強！頭脳使う。

*2015-01-25*

今まででやってきた中で最強。段レベルです。形勢判断うまいので大石取っても全体で負けてたりする。手数読むのも正確。これやってると打ち方変わって強くなれそう。

### 5/5 — AIの進歩に驚き

*2015-01-22*

10年前のこういったソフトで対局したことがありますが、
まぁ酷いものでした。
それと比べると見事な進歩だなと感じます。
ただ、中ヨセから小ヨセが随分お粗末です。
10目以上のところを手抜きして2目のアタリを継ぎに行ったりと終盤は残念な場面が目立ちます。
そこを目をつぶればそこそこ楽しめるのではないでしょうか。
棋風は中央志向、棋力はアマ2段前後と感じました。

### 5/5 — 適度に強い。

*2014-12-14*

問題が有りそうなレビューがあり、心配でしたが、私の初代iPad miniでは、まったく問題なく動いています。
12レベルだと少し待たされるのですが、その時は、こちらも真剣モードなので、まったく気になりません。これは、19路盤の話。私の実力では、勝ったり負けたり。

9路磐 の時は、ほとんど待たされず、ほとんど勝てません。如何に自分の手が甘いのか、大変勉強になります。1000の詰碁を解いてるのと同じですね。
このお値段のアプリとしてさいこうです。感謝！

### 5/5 — 強い

*2014-10-31*

レベル12でアマ3-4段くらいの棋力があるように思います。
初段の私は4石おかせてもらってどっこいどっこい。
他の方のレビューに長考t指摘がありましたが、iPad4では問題ありません。デバイスのパワーによると思います。

## Frequently asked questions about Champion Go

### What is Champion Go?

Champion Go is a Go application designed for players of all levels, from beginner to expert. It utilizes the advanced Crazy Stone Go engine, incorporating Monte-Carlo evaluation and tree search for strong AI play.

### What game modes does Champion Go offer?

Champion Go features two main game modes: Normal game and Medal challenge. The Medal challenge mode includes 150 levels with varying COM levels, handicaps, and board sizes, where players can win medals by defeating the computer under specific conditions.

### Can I play against a strong AI in Champion Go?

Yes, Champion Go offers an 'Engine Server Game' mode where you can play against the latest Deep Learning version of Crazy Stone, installed on their computer server. This AI has achieved a 7d rating on KGS and boasts a winning rate of over 90% against previous versions.

### Does Champion Go support online multiplayer?

While Champion Go allows Human vs Human play on a single device, the 'Engine Server Game' mode is for playing against the AI. Online multiplayer against other human players is not a primary feature described.

### What are the subscription details for Champion Go?

Champion Go offers a monthly subscription for unlimited Engine Server Games at $2.99 per month, with a 7-day free trial. Subscriptions renew automatically unless canceled at least 24 hours before the current period ends.

### What devices is Champion Go compatible with?

Champion Go is available for iPhone, iPad, and iPod. It is rated for ages 4 and up.

### Does Champion Go have ads?

Champion Go does not contain advertisements. The app is free to download and offers in-app purchases for additional features and game modes.

### How does Champion Go help players improve?

Champion Go provides helpful game record features, allowing you to view full game history, restart from selected moves, and replay games. It also offers a 'Hint' feature to suggest moves, aiding in game review and learning.

## Version history (last 5 releases)

### 1.4.1 — 2019-06-29

This update from Apple will improve the functionality of this app. No new features are included.

Upgrade to Universal App.

### 1.3.6 — 2016-08-22

No release notes.

### 1.3.4 — 2014-10-09

No release notes.

### 1.3.3 — 2014-09-19

No release notes.

### 1.3.2 — 2014-07-08

No release notes.

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All apps by UNBALANCE Corporation: https://appshunter.io/developer/358617691

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-10.*