The Bruins have found new and grisly ways to lose hockey games this year. But on Thursday at the Garden, they lost the old fashioned way. They got goalied. Despite a wide edge in play, the B’s spotted the Islanders a 2-0 lead and only David Pastrnak could beat Ilya Sorokin (37 saves) midway through the third period as the B’s took their fifth straight loss (0-3-2).

The Rorschach test that is Islanders hockey offered on Thursday night the same sort of picture it’s been giving ahead of the trade deadline.

Importantly, goalie Ilya Sorokin was markedly sharper and more aggressive than in Tuesday night’s 5-1 loss to the Rangers at UBS Arena — a game in which the Islanders felt they were the better team but could not keep their rivals from consistently crowding the crease. Sorokin finished with 38 saves.

New York’s Brock Nelson shoved him toward the boards at the Islander bench. However, the door was open and Poitras smashed chest first into the opening.

The New York Islanders used goals in each of the first two periods to break a four-game losing streak, beating the host Boston Bruins 2-1 on Thursday night.