Development of the World Chess Championship five incredibly close world championship matches, the World Chess Championship 1984 (controversially terminated without result with Karpov leading +5 -3 =40), World Chess Championship 1985 (in which Kasparov won the title, 13–11), World Chess Championship 1986 (narrowly won by Kasparov, 12½–11½), World Chess Championship 1987 (drawn 12–12, Kasparov retaining the title), and World Chess Championship 1990 (again narrowly won by Kasparov, 12½–11½). In 1993, Kasparov and challenger Nigel Short complained of corruption and a lack of professionalism within FIDE and split from FIDE to set up the Professional Chess Association (PCA), under whose auspices they held their match. FIDE and
World Chess Championship 1969 Candidates Matches to challenge Petrosian for the World Championship, which he did successfully. (Spassky had unsuccessfully challenged Petrosian in 1966.) Larsen and Tal contested a third place playoff in the Dutch town of Eersel in March 1969, which Larsen won 5½–2½. The match was played as best of 24 games. If it ended 12-12, Petrosian, the title holder, would retain the Championship. Spassky won. World Chess Championship 1969 The 1969 World Chess Championship was played between Tigran Petrosian and Boris Spassky in Moscow from April 14 to June 17, 1969. Spassky won. The 1967 Interzonal Tournament was played in Sousse,