
A free daily geography game
Every day the site picks a mystery country and shows you the 5 Wikipedia articles people there read the most yesterday. You get 6 guesses to work out which country it is, and each wrong guess tells you how far away you are and in which direction. It's free, and a new puzzle comes out every day!
A source that found nothing is a measurement. A source that has not run is a gap. Neither means the launch lacks the thing.