Candy Crush Saga is officially hard

摘要

Guilty about the hours you've spent playing Candy Crush Saga? Relax. The addictive video game belongs to a class of fiendish maths problems and playing it might one day help to sol ve them. Launched in 2012, the game draws 93 million players per day. Players see a board of coloured candies and must swap adjacent ones to line up three or more of the same colour.