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
Women's World Chess Championship 1972 were joined by Kushnir, the loser of the last championship match. These four players contested a knock-out series of matches to determine the challenger. Kushnir again prevailed, earning the right to another shot at Gaprindashvili's title. The championship match was played in Riga in 1972. This time, Kushnir came closer than ever to beating Gaprindashvili, but with draws in the last two games the defending champion managed to hang onto her title by one point. Women's World Chess Championship 1972 The 1972 Women's World Chess Championship was won by Nona Gaprindashvili, who successfully defended her title against challenger Alla Kushnir.