The object of this quiz is to click on the circle containing the largest population within Europe. When you begin you'll be shown 2 circles with radii between 50 and 250 km on the map which do not intersect. Click on the one with the larger Europe population within it (based Europe population density info) then 'Submit' - if you are correct you'll move on. One incorrect round and the quiz is over. Every 5 rounds the number of circles on the map will increase by 1. Try to build the longest streak of correct circles. Circles displayed will always be non-intersecting.
PLEASE NOTE: ALL of Turkey is included in counting population (not just European portion), and the portion of Russia west of 61.5 degrees E (just east of Chelyabinsk). Nothing outside Europe (such as Africa or middle east other than Turkey) is included toward the population count within a circle.
Quiz Takers 
Was muss man denn eingeben, damit die Stadt Offenbach grün wird? “Offenbach” jedenfalls nicht. Da wird nur der Kreis grün.
Sie müssen “Offenbach am Main” schreiben.
I had 259, but the score was not saved. 🙁
I like the quiz (but I’m also from Germany, so it’s not so hard for me), but I’m not so happy with the update.
1) in the previous version the german ä,ö and ü worked alongside a, o and u, now they don’t anymore.
2) the abbreviations are kind of odd. For example I didn’t get ‘Neumarkt i.d. OPf.’ because I couldn’t guess what kind of abbreviation you used. The correct name would be: ‘Neumarkt in der Oberpfalz’, but that does not work. ‘Neumarkt i.d. Oberpfalz’ also didn’t work. And there are several other examples where either the abbreviation worked, but not the whole title, or the other way around, and no abbreviation would work. That could definitly work better.
3) You don’t need the exact name of the district any more, which you needed in former versions. I’m not so happy with this, because if you type in ‘rhein’, you will get six or seven districts, which all starts with ‘rhein’. That should not really be the case. Also the difference between a district and a ‘free city’, which have often slightly different names, get lost.
4) if the word ‘kreis’ (german for district) is part of the name without a space between, you have to type it, but not if its an extra word (saalekreis <-> rhein sieg kreis), which is not so konvenient. That was also the case in former versions, but not typing the word ‘kreis’ if its at the end would definitly be more konvenient.
I’m using a new dataset now and the names have changed in it, ill try to fix the names so they are closer to the old way.
Rer ich weis gar nix