Chess right of a deposed champion to a rematch, and the next champion, Armenian Tigran Petrosian, a player renowned for his defensive and positional skills, held the title for two cycles, 1963–1969. His successor, Boris Spassky from Russia (champion 1969–1972), won games in both positional and sharp tactical style. The next championship, the so-called Match of the Century, saw the first non-Soviet challenger since World War II, American Bobby Fischer, who defeated his Candidates opponents by unheard-of margins and clearly won the world championship match. In 1975, however, Fischer refused to defend his title against Soviet Anatoly Karpov when FIDE did
American Chess Quarterly in its pages was "A Bust to the King's Gambit" by U.S. Champion and future World Champion Bobby Fischer, which appeared as the first article in the first issue. In that article, Fischer advocated what became known as the Fischer Defense to the King's Gambit (1.e4 e5 2.f4 exf4 3.Nf3 d6), brashly claiming, "In my opinion the King's Gambit is busted. It loses by force." Fischer later played the King's Gambit himself with great success, winning all three tournament games in which he played it, but choosing the Bishop's Gambit (1.e4 e5 2.f4 exf4 3.Bc4) rather than the King's Knight's