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. 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 
How do you figure #54? The strait of [name of country across the strait from it] is far more than 25 km, even counting outlying islands.
Kinmen County.
Copenhagen is within 25km of a land border?
the countries don’t have to have a land border, I mean the distance is to the closest point on land. ill rephrase the directions.
From what point of an urban area do you measure? Isn’t bujumbura supposed to be on here too?
not big enough city proper population. measuring from city proper limits not urban area limits.
ah, thanks!