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 SECOND LARGEST city in each grid square. 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). You are given a score from 0 to 100 based on your answer's population compared to the 2nd largest city accepted in that square (100 being you named the 2nd largest city). If you guess the largest city it will be based on the ratio of the 2nd largest city's population to the largest.
At the end of the quiz the 2nd largest city will show in each unanswered square, and for those answered the 2nd largest city will be listed next to your score if you didn't answer it.
Quiz Takers 
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.