Online manual at:
http://www.aartbik.com/android_manual.php

Chess for Android consists of a chess engine and a GUI. The application accepts moves through the touch screen trackball or keyboard (e2e4 pushes the king pawn e1g1 castles king side etc.). An optional "move coach" highlights valid user moves during input and last played engine move. Full game navigation enables users to correct mistakes or analyze games. Games import and export as FEN/PGN to and from the clipboard or via sharing load and save as file or are set up through a position editor. A draw by stalemate insufficient material the fifty move rule or threefold repetition is recognized. The engine plays at various levels (including random against itself in auto-play or free-play where the game can be used as a "magnetic chessboard"). The user can play either side and independently view the board from the perspective of white or black.

The application supports the Universal Chess Interface (UCI) and Chess Engine Communication Protocol (WinBoard and XBoard) which allows users to play against more powerful third party engines or even play tournaments between engines. Engines are imported in Android Open Exchange format (OEX) Chessbase compatible format or directly from SD card. Engine setup features time control pondering infinite analysis hash tables multiple threads endgame tablebases and opening test suites.

The application also connects to an external electronic chessboard (DGT Certabo and Millennium).