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Look out Nashville, here come the Blues. In a week that is all about playoff positioning, the Blues took another step up the ladder with a white-knuckle 3-2 victory over Colorado on Ryan O’Reilly’s shootout goal.

It seems like the Blues have been chasing down the Predators forever, and they finally caught them Monday before 17,767 at Enterprise Center. Both teams have 94 points. Both teams have played 79 games, with three remaining. But the Blues have the tiebreaker edge with 41 wins in regulation and overtime — known as ROW — to Nashville’s 40.

So, yes, at this moment, the Blues are now in second place in the Central Division.

“Are we?,” Vladimir Tarasenko said. “It’s real nice.”

OK, not everyone on the roster is playing the closest of attention to the standings. And maybe that’s not a bad thing.

But the Blues were dead last among the 31 NHL teams on Jan. 2. To now be second in the Central is an impressive accomplishment. Borderline amazing.

“We’ve earned it,” Alex Pietrangelo said. “It’s been a long road to get here but we’ve earned this spot that we’re in right now.”

And everyone wearing the Bluenote — Tarasenko included — is aware of the overall goal to finish out the regular season. Namely, earning as much home ice as possible in the postseason and trying to run down Winnipeg for first in the Central.

“We have a lot to play for the last three games now, and like I said before, we’re going to play for a win in every game,” said Tarasenko, who scored his 31st goal of the season to give the Blues a 2-0 lead 14 seconds into the third period.

Alas, Colorado tied it 2-2 with a pair of re-direct goals — deflections right in front of the net. The second, by Alex Kerfoot with 46.4 seconds left in regulation, sent the game into overtime followed by the always nerve-wracking shootout.

Second in the Blues’ three-man shootout rotation, O’Reilly drifted to his right, then slowed, changed direction and fired the puck past Colorado’s Philipp Grubauer who has been one of the NHL’s hottest goalies over the past month.

Meanwhile, Nathan MacKinnon, Gabriel Landeskog and Sven Andrighetto couldn’t get one past Jordan Binnington, who tied a Blues rookie record (held previously by Jake Allen) with his 22nd victory of the season.

“I saw MacKinnon’s shootout goal the other night (against Arizona), he’s got some pretty nifty hands so I was just trying to hold my ground and be patient,” Binnington said. “I got a piece of it and it went over the net.

“Landeskog went for the low blocker. The other guy (Andrighetto) had me. I don’t know what happened, fortunately it rolled off his stick or something like that.”

And that was that — time to play “Gloria,” the team’s unofficial official theme song.

The result put the Blues a season-high 15 games above .500 at 43-28-8, and ensured that they will finish no lower than the first wild-card spot in the playoff seedings. And that means they will not face a Pacific Division team in the opening round.

A Dallas regulation loss Tuesday against Philadelphia clinches a third-place finish for St. Louis in the Central. The Blues didn’t gain ground on first-place Winnipeg, which defeated Chicago 4-3 in overtime Monday to remain two points ahead of St. Louis.

“We’re definitely happy where we are,” Binnington said. “It’s been a lot of fun. We’ve been working together as a team and these are the memories that you create. We’re playing well as a team so hopefully we can keep going into the playoffs here.”

As the season winds down, home ice is looking more and more important, because the Blues have regained their Enterprise mojo with five consecutive home wins and 12 wins in their last 14 in the building.

A day off did wonders for the Blues, at least it appeared to be the case in the opening period. They didn’t look the least bit “exhausted,” as interim coach Craig Berube had mentioned after grueling weekend games in New York and New Jersey.

They controlled zone time and then some, getting the first 13 shots of the game. Colorado did not get its first shot on goal until just more than five minutes remained in the opening period.

The Blues had a Tyler Bozak goal nullified when Colorado successfully challenged that the Blues were offside on the play. But then got a score that counted and a 1-0 lead on Jaden Schwartz’s 11th goal of the season and his first score since his March 19 hat trick against Edmonton. Yet despite outshooting Colorado 15-2 in the period, the Blues had only that one goal.

“You always want to be up more than that, but that’s the way it goes sometimes,” interim coach Berube said. “Their goalie played really well, he’s been playing really well, and that’s how it goes. When you come in after a period like that, you know the (other) team is going to get a push the next period.”

And push Colorado did. The Avalanche outshot the Blues 10-3 in a scoreless second and then tied the game with the two third-period goals.

It was a physical, even chippy, game. In particular, it seemed like the Avalanche directed a lot of ill will toward David Perron.

“Yeah, they had a couple guys running around; I’m not really sure why,” Pietrangelo said. “Refs were letting us play. So pretty hard game. Seems like it’s always like that against these guys. But we can play that game, too.”

And win that game, too.