Boston's 4-3 overtime victory over Chicago was built on a quality advantage that extended far beyond the final shot count. The Bruins generated 60% of expected goals (4.12–2.75 xG) while holding a 58% share of shot attempts (33–24). More importantly, they were significantly more efficient: each Bruins shot carried 0.074 expected goals compared to Chicago's 0.054—a gap that reflects their dominance in creating dangerous chances.

The Bruins converted this advantage ruthlessly where it mattered most. They scored on 40% of their high-danger chances (2 of 5) and were lethal on the rush, netting 3 goals on 29 opportunities. Chicago, despite outshooting Boston on the rush (3 goals on 23 chances), couldn't replicate that efficiency across the full ice surface.

Fraser Minten's snap shot from the high slot with 2:12 remaining in overtime provided the margin. It was the kind of chance—from the danger area—that Boston created with relentless consistency throughout the night.

The model gives Boston a 56% win probability, projecting a 2.4–2.8 scoreline in their favor. The Bruins have the underlying advantage and recent form to back it up, but their success is built partially on luck that won't last.

Boston dominates at 5v5, generating 47.0% of expected goals compared to Chicago's 42.0%, with a 49.0% Corsi% that confirms they're controlling the game. A five-percentage-point edge in expected goals is the kind of gap that drives wins. Add recent form—Boston is 5-1-1 over their last 10 games—and the Bruins look like clear favorites.

The problem is sustainability. Boston's PDO of 1.023 means they're outperforming their underlying metrics, a function of unsustainable luck in shooting and goaltending. Chicago sits at 0.996, much closer to what their play deserves. When regression hits Boston, and it will, the margin shrinks.

Complicating Boston's edge is J. Swayman's back-to-back situation. That opens the door to either a backup appearance or an underperforming starter—a material advantage for Chicago.

Chicago's offensive punch comes from two sources. Tyler Bertuzzi generates 0.85 expected goals per 60 minutes with 20 goals and 15 assists on an 18.0% shooting rate, backed by 7 high-danger chances. Connor Bedard sits slightly behind at 0.82 xG/60 with 17 goals and 27 assists on an 11.8% shooting rate.

Boston's reply is Viktor Arvidsson, who leads the matchup at 1.04 xG/60 with 18 goals and 24 assists. Mark Kastelic supports the attack at 0.89 xG/60, contributing 10 goals and 7 assists.

The model's lean on Boston is justified. The Bruins own the underlying play. The risk is variance—a worn Swayman, or a PDO correction that erases the illusion of dominance. Watch for both.