Rask turned away two shots by Patrick Kane during a strong rush 8 1/2 minutes in the game. Michal Rozsival then threw it at the net and the long rebound went out to Sharp, who shot it past Rask while the goaltender contended with a pile of bodies in front of the net.
It was Sharp’s ninth playoff goal, breaking a tie with Bryan Bickell for the team lead and matching Krejci for the NHL’s best total. A few minutes later, Marian Hossa pushed Rask’s pads and the puck just over the red line in goal. But the officials ruled the play had been whistled dead before the score.
When the first period was over, the Blackhawks had 19 shots on goal. Sharp (six) and Hossa (five) each had more shots than Boston had as a team (four).
“We really slept through the first period and didn’t play very well,” Seidenberg said.
Yet Chicago had only a 1-0 lead. The terrific effort by Rask that kept the Bruins in the game paid off when they got the tying score in the second.
Paille had a takeaway against Sharp behind the net and then made a nice move to get to the other side of the goal. Crawford turned him away, but Kelly was there to poke in the rebound at 14:58.
Kelly’s first playoff goal since April 12, 2012, against Washington and No. 11 for his career ended Boston’s scoreless stretch of 1 hour, 40 minutes and 57 seconds dating to the third period of the opener.
“It’s like the second period, I thought we lost the pace of the game on that end of the rink,” Blackhawks coach Joel Quenneville said. “We had the perfect start to the game, then we stopped doing what made us successful. We stood around. They countered.”
NOTES: Bruins F Nathan Horton played 21 1/2 minutes after leaving the series opener with an unspecified upper body injury. ... Chicago C Jonathan Toews received a standing ovation when he was recognized in the first period with a videoboard message honoring the center for winning this year’s Frank J. Selke award, given to the NHL’s best defensive forward. ... It was the first split of the first two games of the Stanley Cup finals since 2004, when Calgary won the first game on the road and Tampa Bay took Game 2. The Lightning won the series in seven games.
Jay Cohen can be reached at http://www.twitter.com/jcohenap