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The victory in the 2018 World Chess Championship belongs to Magnus Carlsen, who defeated Fabiano Caruana. Carlsen, a Norwegian chess grandmaster, successfully defended his title against the American challenger in a match that lasted 12 games, with the final score being 9-7 in Carlsen's favor. This triumph marked Carlsen's third consecutive World Championship win, solidifying his status as one of the greatest chess players of all time.