All 1M Cities on the Borderless World Map with hints on Dots by typing Countries
There are 552 cities with at least 1 million inhabitants. Each dot consists of two parts: 1) the inner one is highlighted by typing the name of the country or of the city: if you move the mouse over it you can see some of the letters of the answer you have to type! 2) the outer one is highlighted by typing the name of the city
UrbanArea population according to citypopulation.de (reference date 01.01.2017)
Dot size depends on population
Blue dots indicate capital cities (dark blue agglomerations containing them), red dots indicate urban agglomerations 'without main city'
Hints on dots: you are shown the 2nd letter of the country's largest city and the first (n-1) letters of the nth largest one - except you are never revealed the last letter
I think I'm happy enough with that to never try this quiz again. Cool, but soooo time consuming!
Best strategy is to type the name of the COUNTRY the city is in. That will then give you the starting letter(s) to all the cities in that country.
If you are hovering your mouse over the cities after the quiz is finished things might get a little confusing because of the way the quiz is made. Don't read anything into that.
A couple of notes: if you type "addis", Addis Ababa lights up but not the hint dot in the middle - you have to type "addis ababa" for that to work. Also, as you type "Riyadh", it recognizes "riyad" as the correct answer, but only for the hint dot, and not for the actual answer.
Praha is the other one I have noticed a few times. Also could use KSA as a type-in.