Type 'easy' or 'hard' to begin the quiz. Easy is a 15-degree grid, hard is a 10-degree grid. Then, try to name the largest 50K+ cities in each square IN ORDER. To name a city, you must first click on the grid square to make it have a GREEN border. Then, type in the city answer for that square followed by a '.' (a period).
The squares will start with '0/5' (or maybe fewer cities if less exist in that square). Click on a square and enter the largest city in that square not yet answered (so, the largest city if you have yet to answer a city in that square). You will then have '1/5' and need to click on that square to name the 2nd largest city, and so on until you complete all the cities up to 5 (or less if less exist). If you name an incorrect city in a square it becomes 'locked' and turns red and you can no longer accumulate cities in that square.
You receive 1 point for the largest city in a square, 2 for the 2nd largest, and so on.
At the end of the quiz the largest remaining city you haven't named will be shown in each square.
Quiz Takers 
I almost did it, but I hit the refresh button instead of the brightness button
This is very poorly made. Amsterdam should be second after Baku, but it’s not on the list at all for <0m.
Sorry, but this is a ridiculously poor quiz.
New Orleans didn’t average below 0 ft?
According to the source no, and it’s not an average it’s the elevation at the coordinate I use for my city quizzes.
this is about as easy as guiding a drunk rhinoceros, this seems arbitrarily weird maybe i don’t understand this
Why are cities like tokyo, new york, london etc. not accepted? They are definitely among the largest cities?
They are but not among the largest in their elevation ranges – remember on my site populations are city proper not whole metro area.
i can’t figure this game out
also there isn’t enough time
Tokyo is the largest city in the world! how is it not the largest in its elevation range???
Not by city proper population. My quizzes use city proper, per the figures on citypopulation.de.