ST. LOUIS – Vladimir Tarasenko and St. Louis were in trouble Saturday before a vicious hit by Chicago defenseman Brent Seabrook provided an opening for the Blues.

That little crack was all St. Louis needed to put another dent in the Blackhawks’ bid for a second consecutive Stanley Cup title.

Seabrook’s blow to the head of David Backes led to a six-on-four power play for St. Louis that produced Tarasenko’s tying goal with 6.4 seconds left in regulation, and low-scoring defenseman Barret Jackman ended the game with a drive through traffic, giving the Blues a 4-3 overtime victory.

St. Louis has a 2-0 lead in the best-of-seven, first-round Western Conference series. The Blues won the opener in three overtimes.

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Chicago goaltender Corey Crawford said he was screened on the winning goal, adding, “I had my pads together, but there was a little space there and it just kind of squeezed through.”

Other games

Blue Jackets 4, at Penguins 3 (2 OT)

Matt Calvert banged home a rebound 1:10 into the second overtime and Columbus earned the first playoff victory in franchise history by beating Pittsburgh.

The first-round series is tied 1-1.

At Avalanche 4, Wild 2

Gabriel Landeskog scored twice and Semyon Varlamov stopped 30 shots, giving Colorado a victory over Minnesota and a 2-0 lead in their West first-round series.