A Reddit user who unwittingly created their own brainteaser has invited others to take part in their unorthodox puzzle . Taking to the FindTheSniper subreddit, Billy challenged participants to find the screw on his countertop, after admitting: "Not sure how tough it is, but I couldn’t see it!" He shared a snap of his granite kitchen surface, patterned in a way that could test the resolve of even the most eagle-eyed of players. Like your body, your brain needs regular exercise to stay healthy.