Type 'easy' or 'hard' to begin the quiz. Easy is a 15-degree grid, hard is a 10-degree grid. The grid will be randomly placed on the map. 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 
Please give a bit of leeway with the spelling of Yenisei. I think I tried all versions of where to put the I:s and Y:s part from the correct one. (I’ve put some J:s in there for good measure as well.) (And maybe allow Okawango, yes I know it¨s wrong, but..)
The only spellings I’m seeing for it are Yenisei and Yenisey, I’ve added the latter.
Nice quiz
can we get a us version