These places share a link:
Berlin
Budapest
Catalonia
Denmark
France
Italy
London
Scotland
Sicily
Switzerland
Vienna
These places don’t:
Andalusia
Athens
Belarus
Croatia
Cyprus
Ljubljana
Malta
Oslo
San Marino
Sardinia
Slovakia
What is the link?
Inspired by What is the link between these countries? but the solution is unrelated.
This one's pretty hard without very specialised expertise and/or computer help, but that's only fitting, since it seems that the linked places all have a more or less famous
chess opening named after them.
Can't find anything particular about the other list, maybe they're just a random collection of places that don't have that property?
