Type 'easy' or 'hard' to begin the quiz. Easy is a 5-degree grid, hard is a 2.5-degree grid. A random grid will be placed on the map. Then, try to name the THIRD LARGEST 10K+ European city in each grid 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 3nd largest city accepted in that square (100 being you named the 3nd largest city). If you guess the largest city it will be based on the ratio of the 3nd largest city's population to the largest.
At the end of the quiz the 3nd largest city will show in each unanswered square, and for those answered the 3nd largest city will be listed next to your score 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.