For each box, enter the only European country that fits the description excluding countries that have already appeared on the quiz.
For example, if the clue was "The only country whose name starts with R,'" and Romania had already appeared earlier on the quiz, the answer would be "Russia."
Any reference to city population refers to urban agglomeration population according to citypopulation.de
Interesting. I was using the Jetpunk quiz "Countries in the Alps" as a source, but I probably should have been using Wikipedia instead. Or at least have read the comments section on that quiz XD
There's two answers "To win more than 100 Winter Olympic medals" Austria and Bulgaria, and there's two answers "To not have red on their flag" Estonia and Kosovo
North Macedonia also have multiple words in its common name, not just Czech Republic (which is also questionable since the name Czechia is now more used on JetPunk)
Fair points on both counts; I didn't think when I recently updated Macedonia to North Macedonia that it would invalidate an earlier clue. I'll try to get around to fixing this at some point, but at first glance it doesn't look like there are any easy fixes.