public String getChess_row_position(int position){
		switch (position) {
	        case 0:  return "8";
	        case 1:  return "7";
	        case 2:  return "6";
	        case 3:  return "5";
	        case 4:  return "4";
	        case 5:  return "3";
	        case 6:  return "2";
	        case 7:  return "1";
		}
		return null;
	}