7 open source Android apps for chess players: 
The game of chess has challenged and entertained players for centuries. From the courts of medieval royalty to modern after-school chess programs, the game has widespread appeal and has withstood the test of time. Chess is easy to learn but difficult to master. Each player controls 16 pieces on a board consisting of 64 squares. There are six different types of pieces: Pawn, Bishop, Knight, Rook, Queen, and King—so learning the basics can take an hour or so.
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