Conversation so far:
Who won the 1984 world chess championship?
The match became the first, and so far only, world championship match to be abandoned without result.
Why was the 1984 world chess championship abandoned?
The match was abandoned due to the health of the players, which had been strained by the length of the match.
How long was the 1984 world chess championship match?
The 1984 championship lasted for 48 games.
anything else interesting about the 1984 world chess championship besides how long it lasted and the final results?
After, Kasparov's relations with Campomanes and FIDE were greatly strained, and the feud between them finally came to a head in 1993 with Kasparov's complete break-away from FIDE.
what kind of ups and downs were there in the 1984 world chess championship?
Kasparov was down for the first 31 games but won games 32, 47 and 48 for a total score of  5-3 in Karpov's favor.

Question: how did he come back?
Self-contained rewrite: how did Kasparov come back in the 1984 world chess championship?