Try to guess 20 first level administrative subdivision capitals (both in Germany and other countries) closest to Saarbrücken.
For practical reasons, I'm making some exceptions in this series. Relevant exceptions for this quiz are:
For Luxembourg, Liechtenstein, San Marino and Andorra, only country capital and largest (second largest if capital's the largest) municipality seat are included.
Capitals of Belgian provinces are included.
If speakers of languages that don't use latin script consider I should include different transliteration of city names, please let me know.