When amateur player Alex O’Brien unexpectedly won an online poker tournament, little did she know that she’d be pitted against one of the game’s most controversial players. “Just what had I let myself in for? And who even was Dan Bilzerian?” Related: With a study completed in December 2016 and published in Science in March 2017, DeepStack became the first AI capable of beating professional poker players at heads-up no-limit Texas hold’em poker.