BChess
BChess is a chess app for iPhone, iPad and Mac with its own chess engine, written in C++. One App Store purchase covers all three. It plays entirely offline, and its source code is on GitHub.
Features
- All the rules of chess, including castling, en passant and promotion.
- Play against the computer or a friend, or watch the computer play itself.
- An Engine button that shows who stands better, the evaluation and the best line.
- The full move list, with variations and comments.
- Copy and paste games (PGN) and positions (FEN); open PGN files.
- Light and dark mode.
Questions
How strong is the computer?
When you start a new game, you choose how long the computer thinks for each move: 2, 5, 10 or 15 seconds. The longer it thinks, the stronger it plays.
Where are my games saved?
On iPhone and iPad, BChess saves your games automatically and lists them under Games. They are stored in the app’s folder on your device, which you can also browse in the Files app. On the Mac, each game is a document that you save wherever you like, like any other file. Games are saved as .bchess files, and you can share a game as standard PGN.
Does BChess need an internet connection?
No. BChess makes no network requests: the engine runs on your device.
Contact
Questions, problems or suggestions: jean.bovet@gmail.com. You can also report a problem on GitHub.
Privacy
BChess collects no data. Read the privacy policy.