The Bruins knew they’d be pushed in the second half of a back-to-back situation Thursday night after an emotional game in Montreal. They were 100 percent correct. It wasn’t easy and featured one of the ugliest second periods of the season from both teams, but the B’s took home a 2-1 victory over the Phoenix Coyotes at TD Garden on the strength of a pair of first period goals. It pushed the season-high winning streak to seven games and makes the Black and Gold the hottest team in the NHL coming down the stretch. The Bruins built up their early lead while taking advantage of miscues from the Coyotes. Keith Yandle forced a puck blindly up the middle of the ice in the defensive zone, and Zdeno Chara picked it off before firing a wrist shot past a screened Mike Smith. The Bruins doubled their advantage when Jarome Iginla tipped a Johnny Boychuk blast from the right point that saw the B’s full of life. Then came a second period where the Bruins and Coyotes combined for a measly five shots on net, and played the kind if uninspired, constipated hockey that was a way of life before the season-long lockout. The Coyotes shook free of the doldrums in the third period when Lauri Korpikoski redirected an Oliver Ekman-Larsson shot past Rask, and then forced Tuukka Rask into several of his 18 saves on the evening.