The Islanders outshot the Bruins 9-4 in the third after allowing 24 shots through the first two periods.
"Every time we match up against them, it seems to be pretty tight," New York defenseman Ryan Pulock said. "Obviously, our last game (a 7-2 win on Feb. 25) we separated ourselves a bit in the third. Every time, it's a tough game. They're hard, they're physical on their forecheck, we like to play that way too. It was tight all game, especially in the third. We like being in those games, those playoff-type games. We're comfortable there and that's how it's going to be down the stretch here."
Marchand nearly won it for the Bruins in overtime, but his shot from the left circle hit the post with 1:52 remaining.
"They played well, we just have to give them credit," Halak said. "We have to keep building our game. I thought we played pretty well tonight, just the result wasn't there."
NOTES:Islanders coach Barry Trotz became the third in NHL history to coach 1,700 games, joining Scotty Bowman (2,141) and Joel Quenneville of the Florida Panthers (1,730). Trotz is 861-624-155 with 60 ties. … Varlamov has won all four games against the Bruins this season, allowing five goals. … New York, which won for the first time in a game that went past regulation (0-3 in overtime, 1-1 in the shootout), is 13-2-4 in its past 19 games. … Boston forward Jake DeBrusk was a healthy scratch. He has one goal in 17 games this season. … Islanders forward Leo Komarov had two hits in 10:03 of ice time in his first game since Feb. 28. He replaced forward Michael Dal Colle, who was a healthy scratch.