The match was restricted to 24 games. In the case that the match ended in a tie of 12:12 world champion Karpov would keep his title. If Karpov loses he had the right for a rematch. But this rule would be used now for the last time and later abandoned.
Kasparov played the first match in 1984 too risky and intended to play more positional, then waiting for his chance.
Garry Kasparov won the match 13:11 and became world chess champion at the age of 22.