# StonePath: Go Game 9x9 — Baduk trainer: tsumego, joseki

> Interactive 9x9 Go trainer with AI opponents and detailed game analysis. (iPhone/iPad app by Alexey Volvak.)

- Source: https://appshunter.io/ios/app/stonepath-go-game-9x9/id6807205641 (this page in markdown: same URL + `.md`)
- Developer: [Alexey Volvak](https://appshunter.io/developer/6782193690)
- Category: Games, Education, Board, Strategy
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 244 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, Russian, European Spanish
- Released: 2026-09-09
- Data updated: 2026-10-09
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/stonepath-go-game-9x9/id6807205641/reviews.md

## What is StonePath?

StonePath is a 9x9 Go trainer. Not a book, not a collection of diagrams — every position on every screen is a board you play on.

WHY 9x9

The small board is usually treated as a warm-up for 19x19. StonePath is built around 9x9, and on a board this size the engine can look deep: the app ships 23,915 positions rated by KataGo.

NOTHING TO READ — PLAY IT OUT

Shapes, openings, problems and master games are all live boards. Tap an attacking move in a corner shape and the line plays out, with the opponent answering. Play off the book and the move is not refused: the board hands you free play, so you can try your own idea and watch how it ends. Master games step through move by move, and where the book gives a variation, one tap replaces the rest of the game with it.

A 9x9 OPENING BOOK, EVERY POSITION RATED

43 openings in four families, 229 branches, 1,613 positions — every one with a KataGo evaluation: win rate and score.

THE BOOK DOESN'T STOP WHERE THE DIAGRAM STOPS

Two computed layers sit on top of it. 1,745 positions carry the engine's verdict on every reasonable continuation past the last book move, so you can keep playing and see why the best move is best. 20,557 more answer a different question: you just gave away the advantage — here are the three strongest ways to punish it.

TEN OPPONENTS FROM 20K TO 1D

The bots are not just Go engines running a shallow search. They use KataGo's network trained on human games: each bot picks moves the way players at its rank do. Each bot's strength was measured in games against a Go program whose rating is known from games with human players. The results place every bot close to its stated rank on both 9x9 and 13x13. The same ten opponents play on both board sizes.

EVERY MOVE, NAMED

After a game each of your moves gets a verdict on one scale: best, great, good, inaccuracy, mistake, blunder. The thresholds are set in points and tuned for 9x9, and on 13x13 they grow with the board — losing four points on 81 intersections is not the same mistake as on 361.

HELP WHILE YOU PLAY

Three layers you can switch on mid-game: the three best moves lettered on the board, who is ahead and by how much, and the territory map.

1,958 PROBLEMS, 1,932 OF THEM CLASSICS

Gokyo Shumyo (1812) and Guanzi Pu (1660) — the collections generations of players learned from. Difficulty is measured for every problem, and the next one is chosen for your level.

ALSO INSIDE

96 life-and-death shapes, named and settled. Techniques and theory written for the 9x9 board. Chinese or Japanese rules, your choice. A full KataGo engine running on the Neural Engine — no server, no account, no internet. On an iPhone 15 Pro it evaluates 531 positions per second, faster than a rented GTX 1080.

WHAT STONEPATH IS NOT

No 19x19 play against the bot, no online play against people. StonePath is not all of Go — it is learning to play, on the board small enough to understand whole.

FREE, AND WHAT THE SUBSCRIPTION ADDS

Free forever: the lessons, the 9x9 theory, the whole opening book, two opponents, and the start of every problem and shape section. The first seven days open everything.

StonePath Pro adds the engine: position evaluations, the three best moves lettered on the board, play past the end of the book, punishment for a bad move, the territory map, game review, adaptive training, all ten opponents and all 1,958 problems. $4.99 per month or $29.99 per year. Payment is charged to your Apple ID; the subscription renews unless cancelled at least 24 hours before the period ends, and is managed in your Apple ID settings.

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://kai-go.com/privacy

## Key features

- Interactive 9x9 Go board play
- AI opponents from 20K to 1D
- Detailed move analysis and verdicts
- Live opening book with KataGo evaluations
- 1,958 Go problems, including classics
- Life-and-death shape training

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| StonePath Pro - Yearly | $29.99 | per year |
| StonePath Pro - Monthly | $4.99 | per month |


## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/stonepath-go-game-9x9/id6807205641/reviews.md

### 5/5 — Wonderful

*2026-09-19*

Love the app , Will you be adding 13x13 and 19x19 in the future ?

## Frequently asked questions about StonePath

### What is StonePath?

StonePath is a 9x9 Go trainer designed for learning and practice. It features interactive boards for openings, shapes, and master games, with AI opponents and detailed move analysis.

### Does StonePath offer online multiplayer?

No, StonePath does not offer online play against other people. It focuses on single-player training against AI opponents and practicing game scenarios.

### What kind of AI opponents are available in StonePath?

StonePath features ten AI opponents ranging in strength from 20K to 1D. These bots use KataGo's network trained on human games, with their strength influencing move selection and search depth.

### How does StonePath analyze my moves?

After each game, StonePath provides a verdict for every move you make on a scale from best to blunder. The thresholds are tuned for 9x9 boards, offering specific feedback for this smaller game size.

### What are the subscription options for StonePath Pro?

StonePath Pro offers monthly and yearly subscription plans. The monthly plan costs $4.99, and the yearly plan is $29.99, providing access to additional features beyond the free version.

### Is StonePath suitable for beginners?

Yes, StonePath is designed for learning and understanding Go on the 9x9 board. It includes problems, theory, and AI opponents that can be adjusted to different skill levels.

### Does StonePath have ads?

No, StonePath does not contain advertisements. The app is free to use with optional in-app purchases for advanced features.

### What devices does StonePath support?

StonePath is available for iPhone and iPad devices, supporting both iOS and iPadOS operating systems.

## Version history (last 5 releases)

### 1.3.0 — 2026-10-07

• New: games on a 13x13 board against the same ten opponents. Choose the board size on the Game screen.
• Top moves, the territory map and game review work on 13x13 too.
• Opponents now play close to their stated ranks: each one's strength was measured in games against a Go program whose rating is known from games with human players. On 9x9, most were previously stronger than their labels indicated.

### 1.2.0 — 2026-09-26

• Improved Japanese, Korean and French versions of the app.
• Minor fixes.

### 1.1.0 — 2026-09-17

• StonePath now runs on iPad and on Mac with Apple silicon.
• The window can be any size. On a wide screen the board sits on the left, with moves and explanations on the right.
• Works in any orientation on iPad.
• Fixed a rare crash on launch.
• Opponent names are no longer cut off on the PRO tiles.
• The section label at the top of a screen is no longer covered by a stone.

### 1.0.1 — 2026-09-11

• StonePath now speaks Japanese.
• Choose Chinese rules (komi 7) or Japanese rules (komi 6) in settings.
• Bots no longer resign close games, so you get to see the count.
• Smaller fixes and text corrections.

### 1.0.0 — 2026-09-10

No release notes.

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## More apps by Alexey Volvak

- [Meditation Timer: Mindful Rac](https://appshunter.io/ios/app/meditation-timer-mindful-rac/id6796066222)

All apps by Alexey Volvak: https://appshunter.io/developer/6782193690

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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 2026-10-09.*