Angus J. Dunnington is an English poker and online gambling specialist and chess player with the title of International Master (IM). Dunnington is most known for his extensive work in chess opening theory, as well as the psychological aspects of both chess and poker. He stopped playing competitive chess in 2003 in order to spend more time writing, has been a recipient of a Chess Journalists of America award, penned over 1,000 articles and is the author of over 20 books, subjects including chess psychology, unorthodox chess openings and online gambling.