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Charles Krupa, Associated Press
Washington Capitals left wing Alex Ovechkin (8) tries to get his stick on the puck for a shot against Boston Bruins goalie Tim Thomas (30) during the first period of Game 2 of an NHL hockey Stanley Cup first-round playoff series in Boston, Saturday, April 13, 2012.

BOSTON — Nicklas Backstrom scored 2:56 into the second overtime Saturday to give the Washington Capitals a 2-1 victory over the Boston Bruins and tie their first-round playoff series at a game apiece.

Braden Holtby stopped 43 shots for Washington in his second career postseason game.

Tim Thomas made 37 saves for the defending Stanley Cup champions.

Troy Brouwer scored to give the Capitals the lead in the second period, but Benoit Pouliot tied it with 7:47 left in regulation.

Early in the second overtime, Washington won a faceoff in the Boston zone and Marcus Johansson got the puck from behind the net. He passed it to Backstrom at the left faceoff circle and he wristed it past Thomas on his stick side.

Boston won the opener 1-0 in overtime on Thursday night.

Game 3 is Monday night in Washington.