Chess Prep Pro Openings1.9.6 - App Store

Master chess openings: Build chess opening repertoires & memorise your openings.Chess Prep Pro is the ultimate chess openings app, designed to perfect your openings and elevate your game through custom chess opening repertoire creation and training.

How does it work?
Chess Prep Pro allows you to create your own custom chess openings repertoires, and prepare for any opponent move. A chess opening repertoire is an opening plan that contains player responses for opponent moves in the opening phase of the game. With a chess opening repertoire, you will not be left scrambling to find the best move during a real game, as you will already remember the best move from studying and practicing your repertoire.
Discover Chess Prep Pro's Features:
- Custom Chess Opening Repertoires: Build unlimited custom repertoires for any chess opening. Add as many moves and variations as you need to be prepared for every game.
- Repertoire Training: Sharpen your memory with chess opening repertoire training. The app challenges your memory with random positions from your opening repertoire, tracking your progress and helping you master every move.
- Blind Spot Finder: Stay ahead of your opponents with our blind spot finder feature that analyses your chess openings repertoire against billions of player games, identifying the most likely opponent moves that you did not prepare for.
- Chess openings player database: You can use a player openings database that contains billions of moves to find out the most likely opponent move to prepare for.
- Advanced Engine: Utilize the latest StockFish engine for in-depth analysis and uncover the best responses to any situation on the board.
- Downloadable opening repertoires: Expand your opening knowledge with an ever-growing library of specially created and sourced opening repertoires, curated for your success.
- Import / Export: Easily import and export PGNs to and from the app. You can even import liches studies.

Master your chess openings now !

Version History - Improved look and animations.
- Fixed a bug where positions weren't trained in a random order, plus other small bug fixes. 1.9.6 3d ago - Smoother animations and polish throughout the app
- Small bug fixes and improvements 1.9.5 Jul 11 Even faster repertoire loading, especially for larger repertoires.
Added engine evaluation bar in analysis screen. It is on by default when the engine is on but you can turn it off in the settings. 1.9.4 Jun 9 Minnor bug fixes and improvements 1.9.3 May 26 Addressed an issue with opening statistics not loading due to a recent change in the Lichess opening explorer database authentication. Users can now manually connect the app to the Lichess database to retrieve statistics for all positions. This restores functionality for features such as the Opening Book, Smart Trim, and Blindspot Finder. 1.9.1 Mar 9 - Smooth piece movement animations across the app - training, analysis, and repertoire preview
- Configurable animation and pause speed in settings
- Bug fixes and performance improvements 1.9.0 Mar 1 - upgraded stockfish version to most recent version
- small bug fixes and improvements 1.8.13 11/08/2025 Small bug fixes and improvements 1.8.12 10/27/2025 Added an option to train only the main lines when multiple correct player moves exist (for example, in imported PGNs with several variations). You can adjust this in Training Settings before starting a session. 1.8.11 10/21/2025 Small bug fixes and improvements 1.8.10 09/30/2025 - Improved Lichess PGN import to support multi-game files that start from custom positions.
- fixed a gray green when finished training in some rare cases. 1.8.8 09/03/2025 Minor performance optimisations 1.8.6 08/25/2025 - Refreshed UI for a cleaner look in some areas (cards, dialogs, settings, input fields, buttons)
- New training settings page. All training settings moved to this page
- Option to turn off move training correct / incorrect indicator.
- Other small improvements. 1.8.5 08/20/2025 Small bug fixes 1.8.3 08/16/2025 - Added feedback sounds and icons on correct/incorrect moves during training.
- Fixed minor bugs, including loading downloadable repertoires. 1.8.2 08/12/2025 What's new:
• New Smart Train mode — powered by a spaced repetition algorithm to help you remember more, faster. It's the best way to train.
• Simplified training settings and a smoother training flow.
• Finish screen now shows more stats.
• Minor speed and performance improvements throughout the app. 1.8.1 08/11/2025 Small bug fixes and improvements 1.7.6 04/14/2025 - Opening book now works offline for the most common positions
- Speed up the smart trim and blind spot finder features
- Bug fixes and improvements 1.7.1 03/07/2025 - translated the app into 27 languages most common languages
- small bug fixes
- speed up app in some areas
- some UI improvements 1.7.0 02/21/2025 Small bug fixes 1.6.8 01/26/2025 Small bug fixes relating to baord colors 1.6.7 01/23/2025 - UI improvements
- bug fixes
- Added 16 new board colors 1.6.6 01/22/2025 - more robust PGN import options
- fixed a bug in the blindspot finder
- speeds up repertoire loading times 1.6.51 01/05/2025 - App now fully supports transposition: A position that can be reached in multiple different ways will be treated as the same position.
- Added ability to copy FEN of current position to clipboard.
- Made some UI elements larger and easier to see.
- Small bug fixes and improvements. 1.6.5 01/02/2025 - The navigation buttons in the repertoire builder analysis screen now go the the previous and next branching points, instead of to the very start and very end.
- Small bug fixes and improvements. 1.6.3 11/10/2024