Here are three reasons to like the Lightning’s new-look power play. Thursday’s moves were transformative, because the personnel and positional changes made it difficult to tell which was the top unit and which was the second. Point men Victor Hedman and Darren Raddysh switched units, with Brayden Point and Jake Guentzel matched with Raddysh.

Nikita Kucherov capped a three-point outing with a power-play goal 58 seconds into overtime, and the Tampa Bay Lightning rallied to beat the Chicago Blackhawks 4-3 on Friday.