Kevin Fiala scored on a backhander 16:44 into overtime, and the Nashville Predators rallied from a 2-0 deficit in the third period to push the Blackhawks to the brink of elimination with a 3-2 victory early Tuesday morning in Game 3 of the first-round series in Nashville.
Filip Forsberg scored twice in the third period to force overtime. Pekka Rinne made 34 saves, even with his franchise playoff scoreless streak ending early in the second period at 141 minutes, 5 seconds.
Game 4 is Thursday night in Nashville.
Dennis Rasmussen and Patrick Kane each scored the first goals this series for the Western Conference's No. 1 seed.
But the Blackhawks now trail 3-0 for the first time since the 2011 quarterfinals. They lost that series in seven games to Vancouver.
Anaheim 5, Calgary 4 (OT): Corey Perry scored 1:30 into overtime, giving the Ducks a victory over the host Flames and a 3-0 series lead.
Shea Theodore scored late in the second period and got the tying goal in the third as Anaheim rallied from a 4-1 deficit.
Toronto 4, Washington 3 (OT): Tyler Bozak scored 1:37 into overtime to cap Toronto's comeback from two goals down in the second period, and the Maple Leafs beat the Capitals in Toronto to take a 2-1 series lead.
Auston Matthews and Nazem Kadri each had a goal and an assist, and William Nylander also scored for Toronto. Frederik Andersen made 23 saves.
Alex Ovechkin, Nicklas Backstrom and Evgeny Kuznetsov all scored for the Capitals.
Ottawa 4, Boston 3 (OT): Bobby Ryan scored on a tip-in on a power play 5:43 into overtime, and the Senators recovered after giving up a three-goal lead to beat the Bruins in Boston and take a 2-1 series lead.
Ryan got free in the zone, tapping it in on assists by Kyle Turris and Erik Karlsson. Mike Hoffman added two goals for Ottawa.
• Columbus rookie defenseman Zach Werenski will miss the rest of the postseason because of a broken cheekbone suffered Sunday against Pittsburgh.