Fun and challenging

The gameplay is so sure everybody knows: There is rolled, you end up in a field of a category (geography, sports, shows, arts and literature, art history, general) and gets a question with 4 different possible answers provided. Per question one answer is correct in each case. You play against an opponent, either a friend or a random person. The issues go beyond the general education and are quite tricky. I can not judge how many questions includes the game, but it makes an extensive impression. Nice is also, that you can play when you've just time for it, because the opponents have to wait for your answer. This makes it suitable for everyone, whether casual or gamblers.