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 
No Osaka, Buenos Aires, Manila, Chicago, Paris etc… but Chinese cities like Urumqi and Shijiazhuang are? I mean, I get it… there are a lot of people in China, but something just seems off there.
These cities’ city proper population is not nearly as large as their metro population – and on my site city proper is generally used.
got 71/100, china is brutal + a couple of misclicks and mixing up where Hyderabad and Bengaluru
WHERE IS OSAKA, SOME SOURCES CONSIDER IT TOP 10 IN THE WORLD
city proper populations per citypopulation.de Japan census it’s only 2.7 million
Nice Quiz, got 71, missclicked 1 in egypt 3 in India, but china is very difficult in the Shanghai and Guangzhou region with the many Markers.