Biggest World Cities within 400 km with letter hints on dots

Name the cities that are more populous than any other within 400 km.
When you guess a city, move the mouse over its dot to get hints - after its name you will find 6 characters in brackets:
- characters 1-2 are characters 1-2 of the closest city
- characters 3-4 are characters 3-4 of the 2nd closest city
- characters 5-6 are the last 2 characters of the 3rd closest city
Data for 1M cities from, for smaller from
Bigger dots mean bigger population
Blue dots indicate world capitals (dark blue agglomerations containing them), red dots indicate urban agglomerations without a main city
Quiz by scambigol
Last updated: February 7, 2017
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First submittedFebruary 7, 2017
Times taken670
Average score49.2%
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Level 78
Feb 7, 2017
Another Scambigol special!
Level 76
Feb 7, 2017
thanks! any thoughts on the hints on the dots? is it a decent idea? can it be done in a more useful way?
Level 80
Feb 8, 2017
Great quiz again!

Dots don't seem to work in IE but do in Firefox. I find there's not really time to work out clues from the dots. Most of the ones I don't get I haven't heard of anyway :)

Level 64
Feb 7, 2017
This needs to be featured!