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 
Awesome quiz! There are far too many small villages, most of them with strange names, in my country of birth.
Are you truly Czech, or Czechloslovakian?
I was born in Czechoslovakia and I am Czech. But I think that I have already reached my limit on this quiz. By 75% you are left with tiny villages you need to know tons of to make any further progress. 80% is almost impossible unless you start typing in names from a list.
I lived there for 3 years and 44.47% is as far as I got..
Yep, you can basically just start typing random Czech words and you’re bound to find a village with that name.
Very true. You cannot, however, get 100% in this way like cheater Servaes did. I hope he’s a robot, because copying 6000+ names from a list doesn’t sounds like a lot of fun for a human being.