Peter Heine Nielsen
Nielsen became an International Grandmaster in 1994. He won the Danish Chess Championship five times: in 1996, 1999, 2001, 2003, and 2008. He played for Denmark in seven Chess Olympiads, three times on top board.
Nielsen has been coaching world number one, Magnus Carlsen, since 2013. Carlsen won the Candidates Tournament 2013, which gave him the right to challenge Anand for the world championship. He defeated Anand, and has since defended the title three times.
Nielsen has previously coached Carlsen in Khanty-Mansiysk 2005, where Carlsen became the youngest player ever to qualify for the candidate matches.