Nicklas Backstrom scored a power-play goal in overtime to lift the Capitals over the Flyers, 2-1, on Saturday night and extend their franchise-record home winning streak to 15.

Backstrom ended Washington’s power-play frustrations by beating Steve Mason 3:25 into overtime for his 20th goal of the season.

It came with Philadelphia defenseman Michael Del Zotto in the penalty box for holding, the 12th minor penalty of the game.

Dmitry Orlov also scored for the NHL-leading Capitals, who got 30 saves from Braden Holtby.

Mason stopped 22 of 24 shots, while Sean Couturier snapped out of his offensive slump to score the Flyers’ goal.

Philadelphia went 0-for-6 on the power play and is 0-for-15 this season against Washington.

Blackhawks C Jonathan Toews and Penguins C Evgeni Malkin became the 12th and 13th active NHL players to appear in 700 games, both reaching the milestone in Friday victories. News services