A well designed chess app with a lot of powerful features. Features: Play as white or black, against the computer or a friend. 10 difficulty levels, from novice to grandmaster. Include more than 38000 chess puzzles, divided into 13 collections. Support online gameplay. Support Wi-Fi LAN game. Computer hint and unlimited undo for beginners. Changeable chessboards and piece sets, 2D/3D piece styles. Load and save games to PGN files. Autosaving your current game. Setup position, intelligent validity check. Randomly go to any point in the current game. Provide thousands of classic chess games to download, such as grandmaster games, world championship games. Switch to play mode when in view mode, analyze the game, and then restore the view status. More functions: handicap, view move list, automatic move playback, etc.The free version has some limitations.