The Serious Game (Swedish: Den allvarsamma leken) is a 1912 novel by Hjalmar Söderberg. It tells the story of a man and a woman who fall in love when young, and remain in love, but stay separated and marry others. Three Swedish films based on the book have been produced: Den allvarsamma leken (1945), Games of Love and Loneliness (1977) and A Serious Game (2016). Source: Wikipedia (en)