private void run()
  {
    Scanner scanner = new Scanner(System.in);
    char choice;

    boolean running = true;
    do
    {
      printBoard();

      String input = scanner.nextLine();
      for (int i = 0; i < input.length(); i++)
      {
        choice = input.charAt(i);

        switch (choice)
        {
          case 'n':
            knightsTour.step();
            break;
          case 'q':
            running = false;
            break;
          default:
            System.out.println("n = Step, q = Quit");
        }
      }
    }
    while (running);
  }