Peyton Krebs scored an empty-net goal at 19:36 for the 8-5 final.
Chychrun put the Capitals ahead 1-0 at 10:06 of the first period. Reimer made a pad save on Ovechkin’s slap shot from the point, but Chychrun was there to finish on the rebound.
Thompson tied it 1-1 at 12:49, scoring from the left post off the rebound of JJ Peterka’s shot from the right circle on a power play.
“Some things we do early, especially with the puck against this team, that we had talked about and failed to execute,” Capitals coach Spencer Carbery said. “So, it puts you in spot where, ‘Uh-oh. We’ve got to get this thing corrected quickly.’ … We get out of the first period [tied], which I thought was a positive, and then it comes off the rails in the second.”
Ryan McLeod gave the Sabres a 2-1 lead at 2:14 of the second period when he worked a give-and-go with Quinn and poked the puck past Thompson.
Chychrun tied it 2-2 just 32 seconds later, scoring on a wrist shot from the left face-off dot at 2:46.
Tuch put the Sabres ahead 3-2 at 5:17, deflecting Connor Clifton’s shot past Thompson.
Sam Lafferty made it 4-2 at 11:52 when he cut across the slot on the rush and lifted a backhand over Thompson’s glove.
“We talked about our second period, that we need to play a good road second period,” Ruff said. “And I thought we got maybe one of our best road second periods, where we managed the puck better, put the puck in a place where we could get it back and create some pressure, and the discipline to not take a lot of penalties.”