First chose a difficulty by typing ‘beg’, ‘int’, ‘adv, or ‘exp’ – Beginner is 1 degrees, Intermediate 0.5 degrees, Advanced 0.25 degrees, and Expert 0.1 degrees. Then, enter the largest 1K+ city 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. Only UK/Ireland mainland and crown dependencies are included in this quiz.