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Sony AI patent will see PlayStation games play themselves when players are stuck
(www.videogameschronicle.com)
This is a most excellent place for technology news and articles.
It is expensive, but it does work. We've already seen things work to a limited extent on StarCraft 2, Dota, and Gran Turismo, and those are all multiplayer games. The article seems to be talking about single player games, which simplified things a lot.