Recently, a short story I read in high school, has been on my mind. I do not know what is the name of it. It has been about 6 years since I read it. Here is what I remember about it. An alien race makes itself known to planet Earth. The aliens have created a game (I don't remember if it's a board game or a puzzle game) and they challenge the humans. The world leaders gather all the smartest people to be the team representing planet Earth. If the humans lose, they will either become their slaves or they get killed (I don't remember). That's about as much as I remember.