Choose a level by typing ‘beg’, ‘int’, ‘adv’, or ‘exp’ – then name any city of 50K+ population within each square. Beg level is 15 degree squares, Int is 10 degrees, Adv 5 degrees, and Exp is 2.5 degrees. Map may take a minute to display grid on adv and exp levels. When you reach 160 countries you will see the remaining ones left to complete.
Enter level to begin ('beg', 'int', 'adv', or 'exp').