Bourque made it 2-0 on another power play at 19:47. After having an initial attempt denied by a diving save from Swayman, he scored on the rebound with a snap shot at the left post.
Esa Lindell extended the lead to 3-0 at 8:26 of the second period on a one-timer from the point.
Hryckowian pushed it to 4-0 at 19:29 when a rebound off the inside of Swayman’s left pad went in off his skate. The goal was initially waved off due to a kicking motion, but video review determined the puck hit the stick of Bruins forward Mark Kastelic before entering the Boston net.
Dallas outshot Boston 32-11 in the first two periods.
“I think there’s still positives to be taken out,” Swayman said. “It’s hard to be punched in the mouth, but it’s important. It’s a long season. It’s our job to get out of it.”
Robertson scored on a wraparound to make it 5-0 at 3:15 of the third period and roofed a snap shot to extend it to 6-0 at 6:37 on his 29th goal.
Geekie cut it to 6-1 at 12:11, deflecting a shot from David Pastrnak to end a 12-game goal drought with his team-leading 26th.