Zach Hyman's shorthanded breakaway goal on Flames goalie Jacob Markstrom at 10:14 of the third period put the Oilers ahead for the first time in the series and pushed them to a 5-3 victory in Game 2 at Scotiabank Saddledome on Friday.
The best-of-7 series is tied 1-1. Game 3 is in Edmonton on Sunday (8 p.m. ET; ESPN2, CBC, TVAS, SN).
"Just Ryan Nugent-Hopkins] made a great defensive play to break it up and then saw some ice, just took off," Hyman said of the game-winning goal, which came 12 seconds after Warren Foegele had been penalized for slashing. "I had a little half breakaway earlier [and didn't score] so I didn't want to deke, I just wanted to shoot it. I got a good shot off and beat him.
"He's such a big goalie. He's long and lanky and it's hard to beat him across unless you get it up. So when you're coming in with that much speed, it's hard to save it when you just get it off quick."
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Hyman's goal was his third of the series and fifth of the Stanley Cup Playoffs. It was also Edmonton's third shorthanded goal of the playoffs, most in the NHL.
It gave the Oilers a key victory in special teams in Game 2. Edmonton went 1-for-6 on the power play. The Flames were 1-for-5.
"It was a big goal, a really big goal," said Oilers captain Connor McDavid, who had a goal and an assist. "Special teams are a big part of the series, and we got a power-play goal and to get a shorthanded goal, it's usually a good recipe."