Conversation so far:
What type of exhibitions were there on Miracle on Ice?
In September 1979, before the Olympics, the American team started exhibition play.
What year was that?
1979
Where were the exhibitions held?
Norway.
Was it in the Soviet union?
No
What else did you find interesting about this article?
Soviet head coach Viktor Tikhonov later said that this victory turned out to be a very big problem“

Question: Why was it a problem?
Self-contained rewrite: Why was underestimating a problem?