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NHL playoffs: Bruins vs. Senators Game 4

BOSTON — Bobby Ryan scored early in the third period, Craig Anderson stopped 22 shots and the Ottawa Senators beat the Boston Bruins 1-0 on Wednesday night for a 3-1 lead in their first-round playoff series.

It was Anderson's fourth career playoff shutout.

Tuukka Rask made 26 saves for Boston, which had a goal disallowed in the first when Ottawa coach Guy Boucher challenged and the replay showed Noel Acciari was offsides.

The Bruins, who were winless in four games against the Senators in the regular season, will try to force the series back to Boston with a victory in Ottawa in Game 5 on Friday night.

Boston Bruins head coach Bruce Cassidy argues a
Photo Credit: AP / Charles Krupa

Boston Bruins head coach Bruce Cassidy argues a too many men on the ice call during the third period of Game 4 of a first-round NHL hockey playoff series in Boston, Wednesday, April 19, 2017. The Ottawa Senators defeated the Bruins 1-0. (AP Photo/Charles Krupa)

Ottawa Senators goalie Craig Anderson is congratulated by
Photo Credit: AP / Charles Krupa

Ottawa Senators goalie Craig Anderson is congratulated by center Derick Brassard (19) after shutting out the Boston Bruins 1-0 during Game 4 of a first-round NHL hockey playoff series in Boston, Wednesday, April 19, 2017. (AP Photo/Charles Krupa)

Ottawa Senators head coach Guy Boucher talks to
Photo Credit: AP / Charles Krupa

Ottawa Senators head coach Guy Boucher talks to his players during a time out by the Boston Bruins in the third period of Game 4 of a first-round NHL hockey playoff series in Boston, Wednesday, April 19, 2017. The Senators defeated the Bruins 1-0. (AP Photo/Charles Krupa)

BOSTON, MA - APRIL 19: Craig Anderson #41
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Craig Anderson #41 of the Ottawa Senators saves a shot from Brad Marchand #63 of the Boston Bruins during the third period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. The Senators defeat the Bruins 1-0. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: The Boston Bruins
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: The Boston Bruins exit the ice after losing Game Four of the Eastern Conference First Round to the Ottawa Senators 1-0 during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: Craig Anderson #41,
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Craig Anderson #41, Erik Karlsson #65, Jean-Gabriel Pageau #44 and Cody Ceci #5 of the Ottawa Senators defend a shot from Brad Marchand #63 of the Boston Bruins during the third period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. The Senators defeat the Bruins 1-0. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: Bruins fans cheer
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Bruins fans cheer on their team during the third period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs against the Ottawa Senators at TD Garden on April 19, 2017 in Boston, Massachusetts. The Senators defeat the Bruins 1-0. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: Erik Karlsson #65
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Erik Karlsson #65 of the Ottawa Senators skates against the Boston Bruins during the third period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. The Senators defeat the Bruins 1-0. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: Erik Karlsson #65
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Erik Karlsson #65 of the Ottawa Senators celebrates with Craig Anderson #41 and Zack Smith #15 after defeating the Boston Bruins 1-0 during Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

Boston Bruins goalie Tuukka Rask heads to the
Photo Credit: AP / Charles Krupa

Boston Bruins goalie Tuukka Rask heads to the locker room after a 1-0 loss to the Ottawa Senators in Game 4 of a first-round NHL hockey playoff series in Boston, Wednesday, April 19, 2017. (AP Photo/Charles Krupa)

BOSTON, MA - APRIL 19: Bobby Ryan #9
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Bobby Ryan #9 of the Ottawa Senators celebrates with his teammates after scoring against the Boston Bruins during the third period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. The Senators defeat the Bruins 1-0. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: David Backes #42
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: David Backes #42 of the Boston Bruins skates against Derick Brassard #19 of the Ottawa Senators during the third period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. The Senators defeat the Bruins 1-0. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: Bobby Ryan #9
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Bobby Ryan #9 of the Ottawa Senators celebrates with Derick Brassard #19 after scoring against the Boston Bruins during the third period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. The Senators defeat the Bruins 1-0. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: Craig Anderson #41
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Craig Anderson #41 of the Ottawa Senators saves a shot from Brad Marchand #63 of the Boston Bruins during the third period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. The Senators defeat the Bruins 1-0. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: Charlie McAvoy #73
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Charlie McAvoy #73 skates against the Ottawa Senators during the third period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts. The Senators defeat the Bruins 1-0. (Photo by Maddie Meyer/Getty Images)

BOSTON, MA - APRIL 19: Craig Anderson #41
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Craig Anderson #41 of the Ottawa Senators slides to save a shot from Brad Marchand #63 of the Boston Bruins during the first period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts.(Photo by Maddie Meyer/Getty Images)

Ottawa Senators goalie Craig Anderson (41) makes a
Photo Credit: AP / Charles Krupa

Ottawa Senators goalie Craig Anderson (41) makes a diving save on a shot by Boston Bruins left wing Brad Marchand (63) during the first period of Game 4 of a first-round NHL hockey playoff series in Boston, Wednesday, April 19, 2017.

BOSTON, MA - APRIL 19: Craig Anderson #41
Photo Credit: Getty Images / Maddie Meyer

BOSTON, MA - APRIL 19: Craig Anderson #41 of the Ottawa Senators slides to save a shot from Brad Marchand #63 of the Boston Bruins during the first period of Game Four of the Eastern Conference First Round during the 2017 NHL Stanley Cup Playoffs at TD Garden on April 19, 2017 in Boston, Massachusetts.(Photo by Maddie Meyer/Getty Images)

Ottawa Senators goalie Craig Anderson (41) makes the
Photo Credit: AP / Charles Krupa

Ottawa Senators goalie Craig Anderson (41) makes the save on a shot by Boston Bruins left wing Brad Marchand (63) during the first period of Game 4 of a first-round NHL hockey playoff series in Boston, Wednesday, April 19, 2017. (AP Photo/Charles Krupa)

Boston Bruins goalie Tuukka Rask makes the save
Photo Credit: AP / Charles Krupa

Boston Bruins goalie Tuukka Rask makes the save as Ottawa Senators left wing Clarke MacArthur (16) tries to poke the puck free during the first period of Game 4 of a first-round NHL hockey playoff series in Boston, Wednesday, April 19, 2017. (AP Photo/Charles Krupa)

Denna Laing waves the Boston Bruins flag as
Photo Credit: AP / Charles Krupa

Denna Laing waves the Boston Bruins flag as fans cheer prior to the first period of Game 4 of a first-round NHL hockey playoff series against the Ottawa Senators in Boston, Wednesday, April 19, 2017. Laing has been wheelchair-bound since being injured in the 2015 Women's Winter Classic hockey game. (AP Photo/Charles Krupa)

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