Type 'easy' or 'hard' to begin the quiz. Easy is a 5-degree grid, hard is a 2.5-degree grid. A random grid will be placed on the map. Then, try to name the THIRD LARGEST 10K+ European 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 3nd largest city accepted in that square (100 being you named the 3nd largest city). If you guess the largest city it will be based on the ratio of the 3nd largest city's population to the largest.
At the end of the quiz the 3nd largest city will show in each unanswered square, and for those answered the 3nd largest city will be listed next to your score if you didn't answer it.
Quiz Takers 
Perhaps a list of the stations you’ve guessed somewhat like with the periodic table.
Possibly with a per letter scorecard
1st try 77 done
A National Rail stations quiz for all train stations in the UK would be neat.
More time. There’s no way you can get it all done in that time (yes, I see two people have done so, but I am very dubious). Also, it didn’t pop up afterwards with the top 50 most difficult ones. Was this intentional?
there’s 30 minutes now and there are bonuses along the way…so I bumped it up a bit.
Should have more time, I could have done way more with more time. Otherwise good 🙂
a ton of UK (especially London) new users here – so this is for you! let me know if i need to accept any alternates.
Mr. Holmes, first name Sherlock, would like you to know the street he lives on is the name of a Tubeway Station.
Very good quiz, thank you. Echoing gmaric.22, could have done with some more time. You’re asking for two seconds per guess which isn’t possible for us mere mortals.
ill bump it up a little soon