public void restart (){
		this.log.setVisible(false);
		this.setVisible(false);
		getContentPane().removeAll();
		this.board=new Board();
		black=new Cpu(Board.BLACK,board);
		turnChanger = new TurnChanger(new Player(Board.WHITE,board),black);
		this.log=new LogWindow();
		showBoard(true);
		this.log.setVisible(true);
		this.setVisible(true);	
	}