Besides being an chess opening encyclopedia you can also store your own personal notes concerning any of the more than 2000 variations.
All notation is in algebraic figurine notation. You can also bookmark the variations you are most interested in for faster access later on.
Finally you can share variations and position diagrams by email, sms or social networks with your friends for discussion! Opening lines can also be exported to pgn files.
The opening book can be expanded by adding your own moves as well to the database and as the ONLY chess opening app on Google Play you can backup or transfer your custom moves, notes and bookmarks to other devices (built-in cloud support in the app).
Start to improve your chess opening knowledge today!
IMPORTANT NOTE: This book contains most of the opening variations as defined by ECO codes (which covers more than 2000). It's NOT a comprenhensive list of ALL chess opening theory and ECO (Encyclopedia of Chess Openings) contains both "good" and "bad" opening variations. ECO is the global standard for classification of chess opening variations - it does *NOT* judge quality of openings. Just like the ISBN system of books does not judge quality of normal books.
You need to understand standard chess notation for chess moves to be able to use this app.
If you like this app you might be interested in the sister app called "Chess Endings" - search for that on Android market.
Permissions of SD-card read/write is used for storage of temporary position diagrams and pgn files.
Note: the export to pgn file and export to png image feature are only available with android version 2.2 or higher.