Penguins 5, Islanders 4 (overtime)
Chris Kunitz scored his second power-play goal of the contest at 8:44 of overtime as visiting Pittsburgh won Game Three of its Eastern Conference first-round series to seize a 2-1 edge against eighth-seeded New York.
After Sidney Crosby drew a holding penalty on former Penguin defenseman Brian Strait, the Pittsburgh captain fed Kunitz from along the end line on the winning tally.
Kunitz made no mistake in the slot by sailing a shot over the glove of Evgeni Nabokov (20 saves) to end the wild affair.
Jarome Iginla converted on a 5-on-3 power play, Kunitz scored 19 seconds later and Pascal Dupuis capped top-seeded Pittsburgh's three-goal first period by tallying for the third time in the series.
Defenseman Douglas Murray also scored and Marc-Andre Fleury turned aside 32 shots for the Penguins, who will look to push the host Islanders to the brink of elimination in Game Four on Tuesday.
Kyle Okposo scored for the second straight contest and John Tavares tied the score at 4-4 midway through the third period by using Penguins defenseman Mark Eaton as a screen prior to his wrist shot from the right circle.
Matt Moulson and Casey Cizikas staked New York to an early 2-0 lead in the first period.
With the contest tied at 2-2, Crosby skated up the right wing before his backhanded centering feed was tapped home by Dupuis, who had inside position on Tavares.
Murray doubled the advantage after settling Evgeni Malkin's centering pass in the left circle before wiring a shot inside the right post.
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Wild 3, Blackhawks 2 (overtime)
Minnesota recorded their first playoff victory in five years when rookie Jason Zucker scored from a sharp angle 2:15 into overtime to give the hosts a 3-2 win over the Blackhawks.
Pierre-Marc Bouchard scored late in the first period and set up Zucker's winner from along the goal line while Zach Parise also tallied for the eighth-seeded Wild, who trail their Western Conference first-round series 2-1.
Josh Harding made 25 saves for his first career playoff victory for Minnesota, who host Game Four on Tuesday.
Defensemen Johnny Oduya and Duncan Keith provided the offense for the top-seeded Blackhawks, who lost to the Wild outside of a shootout for the first time in 12 contests. Corey Crawford stopped 34 shots.
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Senators 6, Canadiens 1
Rookie Jean-Gabriel Pageau notched his first hat-trick and hosts Ottawa broke Game 3 open with two goals in an eight-second span of the third period to take a 2-1 lead in the Eastern Conference first-round series.
Captain Daniel Alfredsson had a goal and two assists and Craig Anderson turned aside 33 shots as the seventh-seeded Senators took control over the final two periods of a slugfest that featured 232 minutes in penalties.
Game Four of the best-of-seven series will be played on Tuesday in Ottawa.
Kyle Turris and Jakob Silfverberg scored eight seconds apart in the third to turn it into a rout, with their goals sandwiching a flurry of fisticuffs that featured 10 fighting majors.
Rene Bourque scored the lone goal for second-seeded Montreal while netminder Carey Price made 24 saves.
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Sharks 5, Canucks 2
Logan Couture scored two goals and set up two others while Joe Pavelski added a pair of tallies and an assist as host San Jose pushed Northwest Division champion Vancouver to the brink of elimination in their Western Conference first-round series.
Patrick Marleau recorded a goal, captain Joe Thornton notched two assists and Antti Niemi made 28 saves for the sixth-seeded Sharks, who can become the first team to advance to the second round when they host Game Four on Tuesday.
Alex Burrows and defenseman Dan Hamhuis scored for the third-seeded Canucks, who are in danger of being bounced in the first round by a lower seed for the second straight year.
Cory Schneider returned from an injury but was pulled after allowing five goals on 28 shots.