TWO Als built by Meta can beat expert human players at the classic first world war strategy game Diplomacy. The AIs had to learn how to partly cooperate with other players, an element most other game-playing Als don't have to take into account. "There's a quite unique feature here of Diplomacy being collaborative and competitive at the same time, which makes it exciting," says Georgios Yannakakis at the University of Malta, who wasn't involved in the study. Diplomacy involves up to seven players fighting for control of European territories. To build a proficient AI player, a team led by researchers at Facebook's parent company Meta first tried a typical AI trial-and-error algorithm called reinforcement learning.
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