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 Congress not interested in playing a championship match, but Isidor Gunsberg, the third-place finisher, exercised his right and challenged Chigorin to a World Championship match. In 1890, he drew a first-to-10-wins match against Chigorin (9-9 with five draws). These were the same terms (9-9 draw clause) as the first World Championship match between Steinitz and Zukertort in 1886. Incidentally, they were also the same match terms that Bobby Fischer would insist on for his title defense in 1975. The seventh American Chess Congress was held in St. Louis in 1904. With US Champion Harry Nelson Pillsbury ill and dying, Max Judd