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 
Fredensborg seems bugged
this is fixed – was under Fredensborg Stationsby.
Missing a lot of cities around copenhagen.
Ballerup, Herlev, Glostrup, Gladsaxe, Søborg, Rødovre, Hvidovre, Gentofte, Hellerup, Holte, Ishøj, Albertslund, Klampenborg, Vandløse, Skovlunde, Charlottenlund, Bagsværd, and so on. Hope to have them added in some way. Maybe a newer list of city names is available.
those are municipalities, Denmark uses urban areas as the closest thing to cities, or if they are in the Copenhagen area their census counts them toward Copenhagen total.
They are not all municipalities. E.g. Søborg is a town Gladsaxe municipality. I get that a lot get bunched in with Copenhagen as a greater urban area, but it’s waay too “inclusive” in this quiz. In general, most municipalities are named after the largest city in the area, but some have different names e.g. if they used to be two municipalities that were then joined and to make it “fair” they made a 3rd name, usually a nearby lake, forest, or something similar landmark’y.
yeah I just go by my source, http://citypopulation.de/en/denmark
That source identifies Copenhagen as ~ what is normally referred to as the “greater Copenhagen area”, but that’s a region not a city. Somewhat subjective too. It would probably be better to go by municipalities as the umbrella parameter, and then focus on the cities after that. But I get that the source doesn’t do that and you would have to do them manually so I understand completely. It’s just that the natives might be somewhat annoyed. E.g. in Copenhagen there is an enclave (Frederiksberg) that is it’s own municipality (and city) but for all intents and purposes have merged with Copenhagen, similar to the suburban areas.