World 500 Km Coverage Challenge


Choose any 50K+ World city, then continue naming 50K+ cities which are within 500 km of any previously named city. Please note – North/South America and the rest of the world are considered separate sections on this quiz. The game will not end if you haven’t begun one of them and then ‘jump’ over to it to begin working on it. So you get one free city to choose outside of the 500km distance if you want to start working on the section you haven’t started. But once you have started both NA/SA and Rest of World, you cannot guess a city outside a 500km circle or the quiz will end.

Enter a city to begin.


    1. This still happens. Definitely hadn’t jumped to the other continent this time.
      Also, in the instructions it says “SEE NAMING NOTES below quiz.” but there are no notes on this page.
      And how does one enter Jacksonville FL (or any other city where there are 2 or more with the same name in the same country)?

  1. How can San Pedro (Ivory Coast) be entered? I’ve tried several combinations but none worked. Also, is there any way to know the maxiumum score for this quiz? 8640 is a theoretical number, but some places like Australia, New Zealand, Honolulu, Anchorage, Reykjavik, Cape Verde, Mauritius, Fiji etc are not reachable… unless you start there but it’s kind of dumb. 🙂

  2. I was done with NA/SA (or at least what I could do), and then typed in Dublin Ireland to try to start the “Rest of the World” section but the game ended when I typed in Dublin. I don’t know why…

    1. hmmm i just tried a couple times doing some NA/SA cities then entering Dublin and it worked fine – did you perhaps enter a non NA/SA city before Dublin by accident and didn’t see it on the map?

      1. The only thing I noticed is that Dublin, CA is not featured (or can’t be entered) and I couldn’t find a way to enter Athens, GA… as per your instrucions it should be Athensus. No big deal, they’re far from essencial and given the scope of this quiz it must be a pain to get all names right.

        1. athens is fixed now – Dublin, CA had a 2010 census pop under 50K. i’ll be updating the world cities database with 2013 US estimates soon (when Dublin went over 50K).

  3. Portmore (Jamaica) needs a period beacuse of Port Moresby… I don’t think it’s that clever to go to Oceania for this particular quiz but all options should be available the same.

  4. I was trying to type in Fredericton, New brusnwick to continue my north america string, and accidentally typed Frederick, starting a circle in Mauritius. Obviously I messed up, but if there is some way to add a feature allowing you to undo a turn only if its your first circle, could you implement that?

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