Type 'easy' or 'hard' to begin the quiz. Easy is a 5-degree grid, hard is a 2.5-degree grid. A grid will be placed randomly on the map. Then, try to name the 1st-5th largest city in each square, depending on what the square label displays (so if the label says '3rd Largest' you are trying to name the 3rd largest city in that 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 target city accepted in that square (100 being you named the correct city).
AK and HI are NOT included in this quiz as they often have grid squares with only one answer for this quiz.
At the end of the quiz the target city will show in each unanswered square.
Quiz Takers 
Should not Boise City be on here?
The one in Idaho I mean.
I don’t think there currently is a city named “Boise City” – there’s just “Boise” Idaho.
I’m not positive what the official name is, but my understanding is it is officially Boise City, Idaho. The city itself interchangeably refers to itself as the City of Boise (which would not count) and Boise City. The city code is specifically called the “City Code of Boise City.” The mayor’s Covid-19 public health orders have all been issued by the “Mayor of the city of Boise City.” The census designates it as Boise City, but that may be to distinguish it from Boise County.
I refer to it as Boise in all my quizzes. Even the city’s official website just says Boise so I will leave it as that.
Oklahoma’s seems to use the word City:
https://en.wikipedia.org/wiki/Boise_City,_Oklahoma
I so badly wanted “New Jack” to be a bonus answer.
No New York?
the city’s name is ‘New York’ – city is only added to distinguish it from the state…officially it is ‘City of New York’