SliderJackpot: Guess the random position of 3 sliders to edit the site message
sliderjackpot.com
sliderjackpot.com
There are only 100 possible positions for each slider so it seems totally doable to guess the right answer given a few hours.
It actually works out to 1,000,000 possible combinations. With the 5s delay between guesses, that's at minimum 5,000,000 seconds or 57.87 days to guarantee a correct move.