After the Flyers and Bruins took turns humiliating each other in the last two postseasons and Philadelphia took some of the gleam out of the Stanley Cup ring ceremony at the Garden on opening night in October, this could have been a delicious fight. Instead, it took the Bruins only 27 seconds to score the only goal they needed yesterday in a 6-0 shutout that ended the Flyers' seven-game winning streak. The game may have been over even before the opening faceoff, when captain Zdeno Chara took the ice for the B's following a two-game absence while recovering from a knee problem and concussed counterpart Chris Pronger did not even feel well enough to come to the phone for a media conference call. Chara completed the Gordie Howe hat trick in just 27:06. The defenseman won a fight against Jody Shelley with a late takedown at 2:13 of the first period, scored a power-play goal on a 50-foot blast right through Flyers goalie Ilya Bryzgalov at 8:08 and registered an assist on a Nathan Horton goal with the man advantage at 7:06 of the second.