Choose a number of cities by typing ‘3’, ‘5’, or ’10’. Then, enter the largest number of 1K+ population UK cities you chose in each 0.5-degree longitude range. Only green ranges contain answers. When you have 2 left to go in a range it will fill in faintly yellow, 1 left it will be orangish, and all done it turns red. A time bonus is given for completing a square (it is greater for higher levels).
hugequiz Premium members will see the top 25 missed cities at the end of the quiz as purple markers – you can mouseover them to see city details for each.