Norwegian keeps his chess crown

For 20 days the world’s two best grandmasters sat in a soundproof studio in central London, with only a chessboard, their thoughts, and each other for company. But finally, after 15 games, 773 moves and 51 hours of simmering tension, the Norwegian world champion Magnus Carlsen held his nerve, and his crown, with an emphatic rapid-play victory over the US challenger Fabiano Caruana.