First chose a difficulty by typing ‘beg’, ‘int’, ‘adv, or ‘exp’ – Beginner is 10 degrees, Intermediate 5 degrees, Advanced 2.5 degrees, and Expert 1 degree. Then, enter the largest South American city (min 50K population) in each grid square of the size based on your difficulty. Green squares contain answers. Adv and Exp levels may take a few moments to load.
Enter level to begin ('beg', 'int', 'adv', or 'exp').