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 
khartoum doesnt register
It’s not the largest city in its latitude range.
what is the city below yakutsk in russia in advanced
In 1 of the lattitudes the data is wrong it should be guangzhou instead of shenzhen as guangzhou has 300k+ more than shenzhen
data is from citypopulation.de, shenzhen city proper is slightly more
Only Delhi accepted and not New Delhi? I typed in New Delhi multiple times >.<
only the largest in that latitude range is the answer.
They’re two separate cities.