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 who defeated Natalia Pogonina in the final. Hou defeated Muzychuk 6-3 to reclaim the Women's World Chess Championship 2016 title for her 4th championship in March 2016. The following year Tan Zhongyi defeated Anna Muzychuk for the title at the Women's World Chess Championship 2017. Tan lost the title defending it against Ju Wenjun (with Hou not participating at this event) at the Women's World Chess Championship Match 2018. After the 2018 championship the new FIDE president Arkady Dvorkovich announced the format would be changed back to matches only. He said the many different champions the yearly system created discredited