BChess

BChess is a free, open-source chess app for iPhone, iPad and Mac with its own chess engine. It plays entirely offline and collects no data. PLAY - All the rules of chess, including castling, en passant and promotion. Checkmate, stalemate, the fifty-move rule and threefold repetition end the game. - Play against the computer or a friend, or watch the computer play itself. - Five computer strengths, from Beginner to Maximum. Below Maximum the computer takes a moment before it replies, like a human player. - Promote a pawn by picking the piece over the board. UNDERSTAND - The Engine button shows who stands better, the evaluation and the best line, including on your own turn. - The full move list in standard notation: one tap away on iPhone, beside the board on iPad in landscape and on the Mac. - Step back and forward through the game. Open source: the full source code is on GitHub at https://github.com/jean-bovet/BChess Credits: chess pieces by Colin M.L. Burnett (Wikimedia Commons), BSD license. Move generation uses magicmoves by Pradyumna Kannan. The full notices are in the app, under About BChess.