Nigel Short defeats Jan Timman 7½-5½ at the San Lorenzo de El Escorial Candidates Final and emerges as Garry Kasparov's challenger for the World Chess Championship. Kasparov and Short controversially distance themselves from FIDE, setting up the Professional Chess Association (PCA) and announcing that their world championship match will be held in London under the auspices of the new organising body. FIDE denounces their actions and forfeits both players from its own world championship cycle, in the process stripping Kasparov of his FIDE world title. Kasparov wins the PCA world championship match against Short by a comfortable 12½-7½ margin.
FIDE remove Kasparov and Short from its rating list and arrange a rival world championship match between Anatoly Karpov and Jan Timman, both of whom had been defeated by Short in the run up to the PCA final. Karpov wins the contest 12½-8½.
Kasparov wins a very strong Linares tournament with 10/13 from Karpov and Viswanathan Anand (both 8½/13); 11 of the world's top 14 players are in attendance.
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