BOSTON — Zdeno Chara and David Krejci scored in the opening 63 seconds, and the Bruins added two more goals in a 95-second span in the second period tonight to beat the Philadelphia Flyers 5-1 and take a 3-0 lead in the Eastern Conference semifinals.

One year after watching their 3-0 series lead disappear in an unprecedented collapse, the Bruins again moved one game from sweeping Philadelphia in the conference semis. This year they have a chance to do it at home, with Game 4 on Friday night at the TD Garden.

Tim Thomas made 37 saves for Boston, which hasn’t reached the conference finals since 1992.