Duncan Suttles (born 21 December 1945) is a Grandmaster of chess who was the strongest Canadian player between the eras of Abe Yanofsky and Kevin Spraggett. He is one of the few over-the-board grandmasters who also holds the title of Grandmaster of International Correspondence Chess. Suttles has been inactive in over-the-board play since the mid-1980s. He currently serves with the software firm Magnetar Games, as president and chief technologist. Early years Suttles was born in San Francisco, California, but moved to Canada at age 8 when his father began teaching at the University of British Columbia. He was National Master strength by his mid-teens, which was unusual for Canadian chess at that time. His early mentor was mathematician and master Elod Macskasy. Suttles made his first appearance in the Closed Canadian Chess Championship at Brockville, 1961, at age 15, and scored 3/11. Suttles won the British Columbia Championship in 1963 and 1966. In his second Closed, he scored 8½ from 15 games at Winnipeg 1963, finishing just above the middle of the strongest and youngest field yet seen in a Canadian final. Suttles tied for 3rd–5th places in the 1964 Canadian Open Chess Championship in Toronto, and as the top junior, qualified for the 1965 Junior World Chess Championship. He took part in The Gijon International Chess Tournament (1965), achieving 2nd behind Luis Bronstein. At home in Vancouver for the 1965 Canadian Championship, Suttles scored 8/11 and finished second, behind eight-time champion Daniel Yanofsky. As a dual Canadian-American citizen, Suttles was also eligible for the United States Championship, New York City 1965–66, in which he finished last with 2½/11, an event won by Bobby Fischer. Suttles attended the University of British Columbia, and represented the school in inter-university chess competition. He earned his undergraduate degree in mathematics, and began doctoral-level studies, but did not complete his PhD. Represents Canada Suttles represented Canada at the Junior World Chess Championship, Barcelona, 1965, but was drawn into a strong preliminary group which included the eventual winner, Bojan Kurajica, and could only score 1½/4, failing to advance to the finals. Suttles did manage to win the B final, ahead of Raymond Keene. Suttles represented Canada in the qualifying Interzonal event for the World Chess Championship at Sousse, 1967, scoring 9½/21 for 15th place. Suttles won the Canadian Chess Championship held at Pointe-Claire 1969, after a playoff match with Zvonko Vranesic in Toronto, which Suttles