What’s driving the scoring uptick from the Bruins’ D?

Over the last four games, the Boston Bruins received significant offensive production from their defensive core. In reality, their recent stretch is a byproduct of their adaptive approach to Jim Montgomery’s system.

Yet, the offensive production from Boston’s blue line hit a snag before its recent offensive uptick.

The Seattle Kraken did something no other team could: earn a regulation win over the Bruins at TD Garden on Jan. 12. The NHL’s 32nd franchise stymied Boston’s blue-liners in front of Martin Jones’ crease, making them settle for perimeter shot attempts. Coming off their sweep of California, Montgomery’s squad embarked on a rare static outing during Seattle’s 3-0 shutout.

Montgomery…