Board Thread:Challenge Threads/@comment-27897271-20160809141934/@comment-26249703-20160812163152

I have no idea. Maybe a time limit would be good. i.e.:
 * 24 hours without the correct guess: give the track location (get 1 point in a ranking system)
 * 48 hours without the correct guess: give the track variant (get 5 points in a ranking system)
 * 72 hours without the correct guess: give the answer (get 10 point in a ranking system)

If the track doesn't have a variant:
 * 24 hours without the correct guess: give the track location (get 1 point in a ranking system)
 * 48 hours without the correct guess: give the answer (get 10 point in a ranking system)