Olofsson gave his Buffalo a 1-0 lead right at the start of the first period.
Just seconds earlier, he had had a goal disallowed for offside.
The winning goal in extra time, assisted by Rasmus Dahlin, then became Olofsson's sixth of the season.
- I had a good, good chance just before, says Olofsson according to nhl.com.
- I shot it right by (Chicago's Jake) McCabe there, and I knew "Ras" would find me again.
I'll take it, he continues.
It's the third time he's scored two goals in a game so far this season – he scored two against Ottawa two weeks ago, two against Vancouver last weekend and now two against Chicago.
- He is always ready, he is an opportunist, he is always ready, coach Don Granato praises his Swedish match winner.
- He did not disappoint us tonight.
What a shot.