John Tavares scored with 9:49 left, and the Islanders tied their first-round series with the Pittsburgh Penguins on Tuesday night with a wild 6-4 victory in Uniondale, N.Y.
Only the final lead was safe in Game 4.
Tavares slammed in his own rebound in front after Brad Boyes fed him following a turnover by Penguins star Evgeni Malkin. It was the Islanders’ third one-goal advantage in the game and the one that earned them a 2-2 tie in the highly entertaining series that has featured 5-4 and 6-4 finishes at Nassau Coliseum.
Tavares was serenaded with cheers of ‘‘M-V-P’’ from the frantic crowd that is believing an upset is possible. Casey Cizikas shoved in a shot with 1:16 left to add some much-needed insurance.
Captain Mark Streit scored twice, Brian Strait and Kyle Okposo also had goals, and Evgeni Nabokov made 27 saves for the eighth-seeded Islanders.
James Neal, in his return after injuring his ankle in the series opener, scored in the first period. Malkin added a tying goal in the second, and Brandon Sutter and Pascal Dupuis provided the Penguins with a pair of one-goal leads they couldn’t protect. Marc-Andre Fleury stopped only 18 shots.
Pittsburgh beat New York, 5-4, in overtime on Sunday in a game in which both teams squandered two-goal leads.
‘‘We found a way today. Another roller coaster ride,’’ Tavares said. ‘‘We learned from those games when we gave up leads — a lot of us said that one bounce can change a season.’’
Senators 3, Canadiens 2 — Kyle Turris scored 2:32 into overtime, lifting host Ottawa past Montreal to grab a 3-1 series lead.
Turris’s shot from the sideboards sneaked past Montreal backup goalie Peter Budaj, who came on for the injured Carey Price at the start of overtime.
‘‘That was a bit of a lucky shot tonight, but I’ll take it,’’ Turris said of his winner.
Cory Conacher scored with 22.6 seconds to go in regulation to force OT. Mika Zibanejad had the other Ottawa goal.
P.K. Subban and Alex Galchenyuk scored 62 seconds apart in the second period for Montreal.
Sharks 4, Canucks 3 — Patrick Marleau scored a power-play goal 13:18 into overtime and host San Jose beat Vancouver to complete the first playoff sweep in franchise history.
Joe Pavelski scored his second power-play goal of the game to tie it with 4:27 left in regulation. Brent Burns also scored for the Sharks, who will now get a break before beginning the second round of the playoffs next week.
Mason Raymond, Alex Burrows, and Alexander Edler scored for the Canucks, who were unable to hold onto a late third-period lead for the second time this series.
Blackhawks 3, Wild 0 — Patrick Sharp scored two goals and Chicago ratcheted up its defense, putting Minnesota on the brink of elimination in St. Paul.
Bryan Bickell also scored and Corey Crawford made 25 saves for the Blackhawks, who built a 3-1 lead in this best-of-seven matchup.
The Wild had another goalie get hurt when Josh Harding’s injury forced Darcy Kuemper into action after the first intermission.
Sharp scored on Chicago’s first shot at the rookie 62 seconds into the second period.