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.

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.