Dan Boyle and Derick Brassard also scored and Henrik Lundqvist made 30 saves for New York, and Alexander Ovechkin and Evgeny Kuznetsov scored for the Capitals.
“It helped us a lot to get back on track and not think too much, just play our game and get the building going,” said Lundqvist.
Braden Holtby made 32 saves and prevented the Capitals from being blown out early but the highlight of the night came from Ovechkin in the third period.
The NHL’s top goal-scorer got past defensemen Dan Girardi and Ryan McDonagh and beat Lundqvist with a top-shelf shot as he was falling to the ice.
“It’s just an instinct situation,” Ovechkin said.
Rangers coach Alain Vigneault added: “The guys pushed him to the outside and there were almost three guys around him and he still got the shot off from his knees. He’s a great player.”
The best-of-seven series shifts to Washington on Monday night. ?? ?? ?? ?? ?? ????