The Penguins picked up their play in the second period, though, and limited the Capitals to one even-strength shot on goal over the 20 minutes. A puck-handling error by Samsonov led to Colton Sceviour's goal that tied the score at 2-2 at 2:10 before Pittsburgh defenseman Marcus Pettersson answered Backstrom's power-play goal at 10:09 by scoring from the slot at 12:57 of the second.
"We didn't start the way we wanted to today," Guentzel said. "So to get back to the way we want to play the last two periods, I think, was what we needed to do."
The Penguins hope to continue that when they host the Capitals again Tuesday (7 p.m. ET; NBCSN, SN, ATTSN-PT, NBCSWA, NHL.TV). They have plenty of room for improvement.
Center Evgeni Malkin continues to search for his first point of the season but played better as the game went on, creating good scoring chances late in the third period and during overtime. And Pittsburgh needs to clean up the defensive-zone turnovers that hurt them Sunday and in the losses to the Flyers.
But everything looked a lot better after a win.
"We come out of the first couple of games without any points. I thought we played better than the result that we got, but that's hockey," Sullivan said. "Sometimes that happens. So we just had to make sure we responded the right way today, and to get two points, I think, is important for our team. I was happy for our players. I think that should give them a boost of confidence."