Artificial intelligence has made history by beatinghumans in poker for the first time, the last remaininggame in which humans had managed to maintain theupper hand.Libratus, an AI built by Carnegie Mellon Universityracked up over $1.7 million worth of chips againstfour of the top professional poker players in theworld in a 20-day marathon poker tournament thatended in Philadelphia.While machines have beaten humans over the last two decades in chess, checkers, and mostrecently in the ancient game of Go, Libratus' victory is significant because poker is an imperfectinformation game - similar to the real world where not all problems are laid out and the difficultyin figuring out human behavior is one of the main reasons why it was considered immune tomachines.