Situation Room: Okposo has goal overturned in the 1st

At 19:38 of the first period in the Avalanche/Sabres game, Colorado requested a Coach's Challenge to review whether Kyle Okposo interfered with goaltender Semyon Varlamov before the puck entered the net.

After reviewing all available replays and consulting with the Referee, the Situation Room determined that Okposo prevented Varlamov from doing his job in his crease, in accordance with Rule 78.7 which states in part: "The standard for overturning the call in the event of a "GOAL" call on the ice is that the NHL Situation Room (which shall include a former referee in the Officiating Department in the decision-making process), after reviewing any and all available replays and consulting with the Referee who made the original call, determines that the goal should have been disallowed due to "Interference on the Goalkeeper," as described in Rules 69.1, 69.3 and 69.4."
Rule 69.1 states that goals should be disallowed if "an attacking player, either by his positioning or by contact, impairs the goalkeeper's ability to move freely within his crease or defend his goal."
Therefore the original call is overturned - no goal Buffalo Sabres.
Since the Coach's Challenge resulted in the original call being overturned, the Colorado Avalanche retain their time-out.