It’s a best-of-three playoff series.
A shade over four minutes into the second period, a Jordie Benn turnover resulted in Rangers pressure and a Rick Nash goal from close in to win the game.
Almost 12 minutes into the first period, Andrei Markov turned the puck over to Jesper Fast, who went five-hole on Carey Price from close in.
The lead and MSG jubilation held until 18:37, when Shea Weber fed Torrey Mitchell for a tap-in past Henrik Lundqvist.
Shots were 32-24 for the winning team.