John Carlson gave the Capitals a 1-0 lead on slap shot from the point at 8:22 of the second period.
"Those days of defensemen just standing on the blue line and waiting to shoot a puck once in a while, they're gone," Laviolette said. "Defensemen are all over the ice now. The game is changing to a five-man attack and you've got to be sharp defensively to stop it. But I think certainly our defense has been a big part of it. They've contributed a lot of offense this year.
"It was a beautiful goal by 'Orly' in overtime to win it, but I think our defense was looking to create the entire night."
Orlov took six of the 13 shots on goal by Washington defensemen.
Michael McLeod tied it 1-1 on a snap shot off a rebound while skating down the slot at 12:53 of the second. Jesper Boqvist took the initial shot from the right face-off circle.
Hughes hit the post on a snap shot from the slot at 14:57 of the third period.
"They're one of those top-tier teams in the League," Blackwood said. "They're winning different games against different teams and finding different ways to do it, so I give them credit. They're a good team, they're playing well. I think we had a good opportunity to win that one but, I mean, hockey sometimes does not go your way."
NOTES: Lars Eller had an assist on Carlson's goal, his second in three games since returning from a lower-body injury on March 30. ... Capitals forward Garnet Hathaway had five hits and two shots on goal in 13:36. ... Hughes, who took two shots on goal in 20:53, has no points in his past eight games.
NHL.com staff writer Tom Gulitti contributed to this report