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 
What is the source for answers for Tanzania? I would imagine Iringa would be bigger then Ifakara for example.
http://citypopulation.de/en/tanzania/cities/
Um, I selected Germany and someone has a score of 29 (more than the number of letters available, but obviously also more than the number of letters in the alphabet)?
Bosnia & Herzegovina isn’t working for me. Selecting it in the drop-down menu just does nothing, and I have to refresh to choose another country.
fixed this.
Here’s an idea for a similar quiz. You’ve created one with the largest US cities for each census – how about the largest US cities for each letter of the alphabet for each census? Might be too labor intensive, but thought I’d throw it out there