How it happened: The Blues made the Blackhawks pay for a couple of second-period mistakes. The Blues first capitalized on Chicago defenseman Michal Rozsival's boarding penalty when David Backes scored a power-play goal to tie the game at 1-1 at 6:07 of the second period. Later in the period, the Blackhawks were whistled for icing, and the Blues won the ensuing faceoff, put a shot on net and Olli Jokinen scored off the rebound to put St. Louis ahead 2-1 at 15:12. Blues goaltender Jake Allen made 38 saves. The Blackhawks went ahead 1-0 when Marian Hossa intercepted a pass at the Blues' blue line, carried the puck into the zone and fed Kris Versteeg at the net for a goal in the first period. It was Versteeg's first goal since Feb. 24. Blackhawks goaltender Corey Crawford had 31 saves. The Blues were 1-for-3 on the power play, and the Blackhawks were 0-for-2. Chicago defenseman Kimmo Timonen and St. Louis defenseman Robert Bortuzzo were injured in the first period and did not return to the game.
What it means: The Central Division could go a number of ways this week. The Blues overtook the Nashville Predators and moved into first place in the Central with Sunday's victory. The Blues have 105 points through 79 games. The Predators are in second place with 104 points through 79 games. The Blackhawks are in third place with 102 points through 79 games. Chicago's winning streak was snapped at four games. The Blues' last regulation regular-season win in Chicago was Feb. 3, 2010. The Blackhawks and Blues play again Thursday in St. Louis.
Player of the game: Allen didn't allow a goal the final two periods. He has held opponents to two goals or fewer in his past five starts.
Stat of the game: The Blues blocked 24 shots.
What's next: The Blackhawks will host the Minnesota Wild in their final home regular-season game on Tuesday. Chicago is 3-1-0 against the Wild this season.