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Microsoft AI agent masters Ms. Pac-Man

Posted on Thursday, June 15 2017 @ 11:25:29 CEST by

Microsoft Research announced it has created an AI agent that has mastered Ms. Pac-Man, a popular game released in 1980. Using reinforcement learning and a divide-and-conquer method, the AI plays the Atari 2600 version of the game perfectly and achieves the maximum score possible of 999,990.

The researchers used a Hybrid Reward Architecture that utilized 150 AI agents that worked in parallel to master Ms. Pac-Man. Some AI systems were tasked with staying out of the way of ghosts, while others had the job of finding specific pellets. Suggestions from all of the individual AI agents were evaluated by a top agent, which used them to decide where to move the game character.
Doina Precup, an associate professor of computer science at McGill University in Montreal said that’s a significant achievement among AI researchers, who have been using various videogames to test their systems but have found Ms. Pac-Man among the most difficult to crack.

But Precup said she was impressed not just with what the researchers achieved but with how they achieved it. To get the high score, the team divided the large problem of mastering Ms. Pac-Man into small pieces, which they then distributed among AI agents.

“This idea of having them work on different pieces to achieve a common goal is very interesting,” Precup said.

She said that’s similar to some theories of how the brain works, and it could have broad implications for teaching AIs to do complex tasks with limited information.

“That would be really, really exciting because it’s another step toward more general intelligence,” she said.
More details at Microsoft.



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