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 2016 at a 6–6 tie, so tie breaks decided the match. After two draws to begin the rapid chess tie break, Carlsen won the remaining two games to win the match and retain his title. The Candidates Tournament to determine the challenger was held on 11–30 March 2016 in Moscow, Russia, with FIDE's commercial partner Agon as the official organizer, with support from the Russian Chess Federation. The tournament was an 8-player double round-robin, with five different qualification paths possible: the loser of the World Chess Championship 2014 match, the top two finishers in the Chess World Cup 2015, the top