Shogi Lab
Sunfish4 Engine Analysis&Pract
$2.99 · Designed for iPad
Powered by Sunfish4. Play on a clean board with online matches & rankings. Check real-time evaluation, review games, and play offline (CPU or pass-and-play).
A shogi app powered by the full-fledged Sunfish4 engine. With clean, highly readable piece designs and calm controls, you can enjoy every move from the opening to the endgame. In addition to playing, you can check evaluation during a match and replay your games for review, so you can go from play to analysis in a single app. Online matches and rankings are now supported, with CPU matches still available offline.
Key Features
• Analyze while playing (In-game): View the evaluation graph and evaluation value during normal play.
• Thinking time visualization (In-game): Shows thinking time per move in the move list; long thinks are highlighted in red (top 5%) / yellow (top 15%).
• Review cues (In-game / Analysis): Moves where the evaluation shifts significantly are highlighted so you can spot review points quickly.
• Game analysis (Analysis): Review past games with replay / step back / step forward.
• Position jump (Analysis): Tap a move to jump instantly to that position.
• Pause & resume (In-game): Save a game mid-match and continue later.
• CPU strength adjustment (In-game): Change difficulty from practice to serious matches.
• Choose side (Start): Play as either Black or White.
• Undo (In-game): Undo the last move and try again.
• Legal move highlights (In-game): Shows available moves to reduce mistakes.
• Haptics & animations (Controls): Polished feel for moves and interactions.
• Online support: Enjoy online matches and rankings, while CPU play and local two-player mode remain offline-compatible.
Ratings & Reviews
This app hasn’t received enough ratings or reviews to display an overview.
• Made internal improvements and minor adjustments.
The developer, koji ozono, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- koji ozono
- Size
- 69.8 MB
- Category
- Board
- Compatibility
Requires iOS 17.6 or later.
- iPhone
Requires iOS 17.6 or later. - iPad
Requires iPadOS 17.6 or later. - Mac
Requires macOS 14.6 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.3 or later.
- Languages
- English and Japanese
- Age Rating
4+
- 4+
- Copyright
- ©2026 Koji Ozono
