The Boston Bruins went up 3-0 against the St. Louis Blues in Game 3 of the Stanley Cup Final thanks to a tally by Sean Kuraly in the dying seconds of the first period.

The Blues believed the scoring play was offside but were unsuccessful in their challenge.

Here's a closer look at the zone entry:

Officials ruled the play onside because Blues defenseman Joel Edmundson was the last player to touch the puck before it crossed the blue line:

According to NHL Rule 83.1, "If a player legally carries or passes the puck back into his own defending zone while a player of the opposing team is in such defending zone, the offside shall be ignored and play permitted to continue."

The Blues were assessed a two-minute bench minor for the unsuccessful challenge. Bruins winger David Pastrnak scored on the ensuing power play early in the second frame to give Boston its fourth goal.

Copyright © 2019 Score Media Ventures Inc. All rights reserved. Certain content reproduced under license.