Libratus, the poker-playing AI, destroyed its four human rivals

The Steve Miller classic profoundly states that "you've got to know when to hold'em, know when to fold'em," and for the first time, an AI has out-gambled world-class players at heads-up, no-limit Texas Hold'em. Our representatives of humanity -- Jason Les, Dong Kyu Kim, Daniel McAulay and Jimmy Chou -- kept things relatively tight at the outset but a ill-fated shift in strategy wiped out their gains and forced them to chase the AI for the remaining weeks. At the end of day 20 and after 120,000 hands, Libratus claimed victory with daily total of $206,061 in theoretical chips and an overall pile of $1,766,250. "This is a landmark step for AI," said Libratus creator and Carnegie Mellon University professor Tuomas Sandholm in an email. "This is the first time that AI has been able to beat the best humans at Heads-Up No-Limit Texas Hold'em. More generally, this shows that the best AI's ability to do strategic reasoning under imperfect information has surpassed that of the best humans."