"I thought the guys did a great job to not only work hard and play a good team, but play the right way most of the game," said Smith, who allowed six goals on 21 shots before being pulled in the second period of a 9-1 loss to the Pittsburgh Penguins on Thursday. "If you do that you have a chance to win hockey games. We had a chance to win tonight and that's the way we want to play."
With Smith pulled for the extra attacker, Tkachuk tied the game 3-3 at 18:33 of the third period when he tipped Rasmus Andersson's point shot over Copley.
"It's just business as usual," Copley said. "Those kinds of things happen. It's a game and it's unpredictable at times. Everyone stayed even-keel. We knew that there was still a big opportunity to win. Everyone just stayed calm."
Copley stopped Tkachuk's tip with 26 seconds remaining in the third period and made consecutive pad saves on Sean Monahan in the final seconds of overtime. He also stopped three of four attempts in the shootout.
"It's fun to see him getting his first win here," Backstrom said. "It was nice to get this one to him and get this off his back."
Vrana scored on a pass from Kuznetsov on a 2-on-0 break after a turnover inside Calgary's blue line to put Washington up 1-0 at 9:28 of the first period, and Oshie scored on the power play on an Alex Ovechkin rebound to make it 2-0 at 14:27.