Chess Lab & Analysis
Arasan Engine Analysis &Pract.
$2.99 · Designed for iPad
Play full-featured offline chess on a beautiful 2.5D board with the Arasan engine. Analyze games, review positions, and enjoy real-time online multiplayer with friends.
A chess app with beautiful 2.5D board graphics and the powerful Arasan engine. In addition to enjoying full games, you can check the game situation during play and analyze your game history, so everything from play to analysis is completed in a single app. Both CPU matches and local two-player on one device are fully offline.
Key Features
• Analyze during play (In-game): View the evaluation graph and evaluation display while playing.
• Thinking-time visualization (In-game): Show thinking time for each move in the move list, highlighting long-think moves in red (top 5%) and yellow (top 15%).
• Analysis cues in the move list (Analysis / In-game): Moves that become significantly worse are highlighted with a red background, making key positions easy to spot.
• Game history analysis (Analysis): Analyze past games with play / step back / step forward controls.
• Position jump (Analysis): Tap a move to jump instantly to that position.
• Suspend & resume (In-game): Save an unfinished game and continue later.
• Adjustable CPU strength (In-game): Change the difficulty from casual practice to serious games.
• Choose side (Game start): Select your side (White / Black).
• Undo (In-game): Take back the last move and try again.
• Promotion support (In-game): When a pawn reaches the last rank, choose the promotion piece (Queen / Rook / Bishop / Knight).
• Board view toggle (Display settings): Switch between 2.5D and a flat view.
• Legal-move highlights (In-game): Highlight available moves to reduce mistakes.
• Haptics / animations (Interaction): Tactile feedback and animations for moves and actions.
• Play online or offline: Challenge friends or players worldwide, or play vs CPU / local two-player on one device.
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
- 50.8 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
