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 
7130 First Try. I need to learn where things actually are
8819 first try, I am terrible at the north
9542 first try! Mistaking Hemel Hempstead AND High Wycombe for Watford cost me dearly – as well as Wakefield for (I think) Castleford and Wythenshawe for Ashton-under-Lyne.
7321
7651
Good game!
Fun