In the first period, the Canadiens looked like a tired team that was playing its third game in four nights, but Montreal came to life in the second period and posted a 2-1 win over the Boston Bruins Thursday night at the Bell Centre. Tomas Plekanec pulled the Canadiens into a tie at 1-1 when he beat Tuukka Rask from a sharp angle for his 10th goal of the season at 9:16 of the second period. Max Pacioretty notched the game-winner at 17:42 when he scored with a backhander off the rebound of a shot by Raphael Diaz. Pacioretty has scored at least one goal in each of the Canadiens’ last five home games and leads the Canadiens with 11 goals. Defence first: The Bruins rank first in the NHL in goals-against but the Canadiens are No. 2 and Carey Price prevailed in a goaltending duel with Rask. Price made 32 saves as he posted his sixth consecutive win. He has allowed two or fewer goals in nine consecutive games. Slow start: The Canadiens played a sluggish first period and fell behind 1-0 when Gregory Campbell scored his second goal of the season at 17:35 on a feed from Milan Lucic. The Canadiens were outshot 10-3 in the period but had a 17-7 edge in the second.