Kunitz could have crushed Niskanen but the hit would have been late and illegal. At the last instant Kunitz veered away, did not make contact with Niskanen and went to the bench for a change.
"Obviously we want to be physical," Kunitz said. "We want to chip their body. We want to get in on the forecheck. But we have to be disciplined. We know their power play's unbelievable and it's tough to shut them down time after time after time. If you take those undisciplined penalties anything can happen."
The Penguins were more disciplined than the Capitals, who took six penalties in the offensive zone, and five of them led to Pittsburgh power plays.
Penguins defenseman Justin Schultz scored the winning goal on the power play 11:24 into the second period after Capitals defenseman John Carlson was called for roughing Penguins forward Scott Wilson.
And on a night in which the Penguins were missing some of their best players, the Capitals best players didn't take advantage. If they can't beat the Penguins under these circumstances, when can they beat them?
"We had an opportunity to play well," Capitals coach Barry Trotz said. "I didn't think our top guys really stepped up today, which was very unfortunate for us. … The Pittsburgh Penguins have played without a number of players all year, and you were going to get their best game, and you needed our best game to beat them. And we know that. They stepped up."