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 abandoned in controversial circumstances with Karpov leading 5 wins to 3, and replayed in the World Chess Championship 1985.

Garry Kimovich Kasparov is a Russian chess grandmaster, former World Chess Champion (1985–2000), political activist and writer. His peak FIDE chess rating of 2851, achieved in 1999, was the highest recorded until being surpassed by Magnus Carlsen in 2013. From 1984 until his retirement from regular competitive chess in 2005, Kasparov was ranked world no. 1 for a record 255 months overall. Kasparov also holds records for the most consecutive professional tournament victories (15) and Chess Oscars (11).