Type 'easy' or 'hard' to begin the quiz. Easy is a 5-degree grid, hard is a 2.5-degree grid. Then, try to name the LARGEST European 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 
Can you make some of these for Africa, South America, and the Middle East? Also, how about coverage for cities starting with the same letter as their country? You could even break that into separate versions for each letter.
I would love to have this quiz for other continents as well! As far as I can see, there is only a World version and a Europe version. That should be relatively easy to make, right?
I have Ioannina, Ierapetra, and Ialysos in Greece, but for the life of me I either cannot find the fourth city, or cannot come up with the proper spelling. Is there a listed source somewhere?
Did you ever figure it out?
Imittos