Complex sentence: Sven Magnus Øen Carlsen (born 30 November 1990) is a Norwegian chess grandmaster, reigning World Chess Champion and the No.1 ranked player in the world, and the reigning World Champion in rapid and blitz chess.
Split into simpler sentences: Sven Magnus Øen Carlsen (born 30 November 1990) is a Norwegian chess grandmaster, reigning World Chess Champion and the No.1 ranked player in the world. He is also the reigning World Champion in rapid and blitz chess.