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 
I wish all those cities in the Rhine-Ruhr area would just merge into one city one day. Or maybe two, because this is boring, if every other one is roughly the same position.
I went through all cities, got 8935 points, but it did not get saved.
Hmm – I just tested and it saved fine. I’ll manually add your score.
It’d be nice to see the average distance at the end.
Displaying Umlauts correctly is crucial, for example there is Münster but also Munster, which are in completely different regions
but only one is in the top 100 cities, the other is much smaller.