Conversation so far:
Where did the World Championship take place?
CANNOTANSWER.
Who were his opponents?
match between Anatoly Karpov and Garry Kasparov.
Did Garry win?
The match became the first, and so far only, world championship match to be abandoned without result.
What was his playing style?
CANNOTANSWER.
What is an interesting fact about this World Championship?
The termination was controversial, as both players stated that they preferred the match to continue.

Question: Why was it controversial?
Self-contained rewrite: Why was the termination of the 1984 World Championship controversial?