Chess Opener Lite1.26.2

Features:
- Chess opening tree with game statistics
- The Encyclopedia of Chess Openings (ECO)
- Compare ECO and opening tree moves side by side in any position
- Export chess openings in PGN format
- Build your own opening repertoire
- Add or edit comments on moves
- Automatically classify any sequence of moves using the ECO system
- Chess opening explorer highlights moves already in your repertoire
- Chess database includes all transpositions
- Interactive trainer to memorize your chess openings and variations
- Train multiple variations at once against random opponent moves from your repertoire
- Set up a starting position for training
- Track your training progress
- Customize chessboard colors and chess pieces
- Supports dark mode
- Works completely offline

CHESS OPENING EXPLORER
Search in the Encyclopedia of Chess Openings or browse the chess opening tree. Swipe left or right to switch between the exploration features in any position.

BUILD YOUR OPENING REPERTOIRE
Add your favorite opening lines to your repertoire using the chess opening explorer. You can always edit the names of your openings and organize them in your repertoire.

OPENING TRAINER
A simple and efficient method to memorize variations of openings in your repertoire. You can train either white’s moves or black’s moves only or both. Optionally, you can train all variations at once. The trainer chooses the opponent’s moves randomly from your opening repertoire. Chess Opener tracks your progress and shows your stats.

Upgrade to Chess Opener PRO to unlock more features:
- Unlimited repertoire size
- Unlimited depth of openings
- 6x larger opening tree with game statistics
- Database of top 100+ grandmasters’ repertoires
- Powerful chess engine analysis
- Import openings in PGN format

Version History - Performance improvements
- Bug fixes 1.26.2 Sep 26 - Performance improvements
- Bug fixes 1.25.1 Jan 25 - Performance improvements
- Bug fixes 1.24.5 Jan 14 - Performance improvements
- Bug fixes 1.24.3 10/02/2025 - NEW settings: Manual dark/light app theme
- Bug fixes 1.24.0 09/28/2025 - Fixed animations 1.23.3 09/08/2025 - Performance improvements
- Bug fixes 1.23.1 07/28/2025 - App translated to German, Spanish, and French
- Bug fixes 1.22.0 10/09/2024 - Bug fixes 1.21.5 08/16/2024 - Fixed occasional app crashes when starting the training mode 1.21.4 08/08/2024 - Bug fixes 1.21.2 08/01/2024 Improved training screen:
- Final training score no longer hides the chessboard
- Share/export games and positions during training
- Toggle comments
- and more while keeping the training screen clean and focused 1.21.1 06/26/2024 - Support Apple Silicon Macs
- Bug fixes 1.20.0 03/11/2024 - Bug fixes 1.19.1 02/11/2024 - NEW: Resume training sessions after reviewing openings in the middle of training
- Bug fixes 1.19.0 02/07/2024 - Performance improvements
- Bug fixes 1.18.1 12/29/2023 - Bug fixes 1.17.1 07/13/2023 1.17.0
- Show variation names during training (can be disabled in Settings)
- Performance improvements 1.17.0 07/03/2023 - Fix crashes when training large repertoires 1.16.2 05/27/2023 - Performance improvements
- Bug fixes 1.16.1 05/22/2023 - Support split screen on tablets
- Share/export PGN to a file, message, e-mail, etc.
- Share/export position (FEN)
- Bug fixes 1.15.2 11/19/2022 - Select entire chapters in your repertoire for editing or training
- Bug fixes 1.14.1 10/29/2022 - Added 1000+ variations to the list of openings
- Fixed illegal promotions
- Performance improvements 1.13.2 07/09/2022 - Piece movement animations 1.12.0 03/12/2022 - Show comments during training (can be disabled in settings)
- New option to permanently skip training for chosen lines
- Show a time since the last training attempt
- New settings to show/hide ECO codes
- Bug fixes 1.11.0 02/01/2022