Marc Tyler Arnold (born November 20, 1992) is an American chess player who received the FIDE title of Grandmaster (GM) in September 2012.
Arnold won his first game against a Grandmaster at the age of 10, defeating 6-time US Champion Walter Shawn Browne in 29 moves at the 104th US Open[5] in Los Angeles, California, on August 11, 2003.
At that time, as a young student he worked on his game several days a week with National Master John Mac Arthur.
British Champion and Grandmaster Mark Hebden worked with Marc during the World Junior Chess Championship in 2010.
[7] Arnold graduated CGPS in 2011, becoming a founding member of the Columbia Grammar and Prep School Chess Hall of Fame.