Type 'easy' or 'hard' to begin the quiz. Easy is a 15-degree grid, hard is a 10-degree grid. Then, try to name the LARGEST city in each grid square which fits the category label for each square. The grid will be placed randomly each time. To name a city, you must first click on the grid square to make it have a GREEN border. Then, type in the city answer for that square followed by a '.' (a period). You are given a score from 0 to 100 based on your answer's population compared to the largest city accepted in that square (100 being you named the largest city).
LETTER: means the city starts with that letter.
NUMBER RANGE: (such as 2-5, 10+) means the city contains that many letters (excluding spaces and special characters).
POPULATION RANGE: (such as 50-100K) means the city has that range for its population.
2+ WORDS means the city name has 2 or more words (words denoted by a space or hyphen).
At the end of the quiz the largest population missed answer will show in each unanswered square, and for those answered the largest city will be listed if you didn't answer it.
Quiz Takers 
Democratic Republic of Congo is not working. Why is that?
Just use ‘DRC’
how is Denmark wrong if it specifically says including dependent territories?
It borders Canada via Hans Island.
Doesn’t Sweden border Denmark via bridge (and isn’t Denmark larger than Sweden when Greenland is included)?
Bridge borders (unless they are causeways) do not count.
Got it. How do you differentiate between a bridge and a causeway? I assume the Bahrain/Saudi Arabia link is a “causeway?”
Yeah, same with Singapore/Malaysia. It’s a judgment call.