Provides a very basic chess game and AI.
To construct a new chess board, use the Board class.
>>> board = Board();
To show the board, print board.
>>> print(board)
To locate a position, use locate().
>>> locate("a3")
a3
To get a piece, call the get_piece method.
>>> board.get_piece(locate("a1"))
Rook("white") at a1