World Chess Championship 1984–1985
The World Chess Championship 1984–1985 was a match between challenger Garry Kasparov and defending champion Anatoly Karpov in Moscow from 10 September 1984 to 15 February 1985 for the World Chess Championship title. After 5 months and 48 games, the match was called off, with Karpov leading 5 to 3, and 40 draws. The match was replayed in the World Chess Championship 1985.
1981-82 Zonals
There were three different paths to the Interzonals. First, players qualified from twelve different Zonals. Second, some players qualified on rating. Third, the six quarter-final and semi-final losers from the previous Candidates in 1980 qualified.1982 Interzonals
Three Interzonal tournaments were held. The top two finishers in each qualified. Zoltán Ribli won the Las Palmas Interzonal ahead of 61-year-old former World Champion Vasily Smyslov. Kasparov, 19 years old, won the Moscow Interzonal by a 1½ point margin ahead of Alexander Beliavsky. The Toluca Interzonal was won jointly by Lajos Portisch and Eugenio Torre.1983–1984 Candidates tournament
The six Interzonal qualifiers were joined by Viktor Korchnoi and Robert Hübner, the Candidates finalists from the previous cycle. The eight players participated in a series of knockout matches. The winner was Garry Kasparov.The Smyslov–Hübner match was tied at 5–5. After playing four extra games without breaking the tie, the match was resolved by a spin of the roulette wheel. The ball went into the zero on the first spin, before deciding in favor of Smyslov.
Politics threatened Kasparov's semi-final match against Viktor Korchnoi, which was scheduled to be played in Pasadena, California. Various political manoeuvres prevented Kasparov from playing Korchnoi in the United States, and Kasparov forfeited the match. This was resolved when Korchnoi agreed for the match to be replayed in London, along with the Vasily Smyslov vs. Zoltán Ribli match. The Korchnoi–Kasparov match was put together on short notice by Raymond Keene. Kasparov won 7–4.