Phil Kessel added his 27th goal of the season and David Krejci his 21st, while P.J. Axelsson scored an empty-netter for the Bruins. Krejci's goal was his first in eight games, while Kessel's was only his fifth point in the last 17 contests.
But the star was clearly Recchi, who played his second game, since being acquired by the Bruins from the Tampa Bay Lightning at Wednesday's trade deadline. The veteran winger was held pointless in his Boston debut, in a 2-1 loss to Phoenix, after tallying five assists in Calgary in his final game with the Lightning.
It was a much-needed victory for Boston, who wrapped up their six-game home stand by winning for the first time in four contests. For the home stand, the Bruins went 3-2-1 but had been on a 3-6-3 funk before Saturday's triumph.
Had the Bruins not beaten the Blackhawks, they would have endured their second four-game losing streak in less than a month.
But Recchi's heroics ensured the B's would be back on the winning track.
Bruins goaltender Tim Thomas reached the 28-win plateau for the third straight season in the victory, stopping 32 Chicago shots.
The Bruins seemingly put the game out of reach early in the third period, when Kessel's goal gave the Bruins a 4-1 advantage. The Blackhawks, however, got to within 4-3, when Kris Versteeg and Patrick Kane scored in a four-minute span.
Jonathan Toews scored the other Chicago goal—his 27th.
Axelsson's clinching goal came with 33 seconds remaining—his fifth of the season.
Blackhawks goalie Cristobal Huet, who had been 10-3-0 with a sub-2.00 GAA against Boston going in, made 34 stops.
The Bruins' next opponent is Sean Avery and the New York Rangers on Sunday afternoon at Madison Square Garden—a tilt which will be broadcast on NBC.