Type 'easy' or 'hard' to begin the quiz. Easy is a 2-degree grid, hard is a 1-degree grid. Then, try to name the largest UK 1K+ 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 
Can you make some of these for Africa, South America, and the Middle East? Also, how about coverage for cities starting with the same letter as their country? You could even break that into separate versions for each letter.
I would love to have this quiz for other continents as well! As far as I can see, there is only a World version and a Europe version. That should be relatively easy to make, right?
I have Ioannina, Ierapetra, and Ialysos in Greece, but for the life of me I either cannot find the fourth city, or cannot come up with the proper spelling. Is there a listed source somewhere?
Did you ever figure it out?
Imittos