possible_moves(self, piece, state = None) - Return a list of possible moves for piece.
- If state is None, the piece must be in a known classical state
- If state is not None, the state of the piece will be temporarily set
possible_moves(self, piece, state = None) - Return a list of possible moves for piece.
- If state is None, the piece must be in a known classical state
- If state is not None, the state of the piece will be temporarily set