public interface Game
{
	//Return true if the game is completed, false otherwise
	public boolean isOver();
	
	//Return true if it's the Player's turn
	//Return false if it's the Computer's turn
	public boolean isPlayersTurn();
	
	//Update the state of the game by making a Computer move
	public void makeComputerMove();
	
	//Prompt and input the Player's next move
	public String getPlayersMove();
	
	//Return true if parameter move represents a valid move,
	//       false otherwise
	public boolean isValidMove(String move);
	
	//Update the state of the game by making the Player move
	//PRECONDITION: parameter move represents a valid move
	public void makePlayersMove(String move);
	
	//Return true if the game is over and the Player has won, false otherwise
	public boolean playerWins();
	
	//Return a printable image of the state of a game
	public String toString();
}