An artificial intelligence has beaten eight world champions at bridge, a game in which human supremacy has resisted the march of the machines until now. The victory represents a new milestone for AI because in bridge players work with incomplete information and must react to the behaviour of several other players – a scenario far closer to human decision-making. In contrast, chess and Go – in both of which AIs have already beaten human champions – a player has a single opponent at a time and both are in possession of all the information. "What we've seen represents a fundamentally important advance in the state of artificial intelligence systems," said Stephen Muggleton, a professor of machine learning at Imperial College London. French startup NukkAI announced the news of its AI's victory on Friday, at the end of a two-day tournament in Paris.