A slashing penalty against Bulldog Jesse Root at the 2:19 mark gave the Crimson its first power play of the evening. Despite consistent pressure and a flurry of shots, Harvard, which has the top-ranked power play in the nation, failed to convert.

The team’s power play looked flat for the rest of the period.

“We just got away from what we were doing with our breakouts,” Killorn said. “I think guys were getting a little frustrated, trying to force things a little bit on the breakout.”

The Crimson had another opportunity with just over two minutes left in the period. With the puck in Yale’s defensive zone, Donato took Michalek out of goal to redouble Harvard’s pressure. But that tactic didn’t work either, and the buzzer sounded on the second period with both teams still knotted at two.

The Crimson power play clicked in the final period, and Everson broke the stalemate with a timely goal on the man advantage midway through the third frame. Harvard now has scored a power-play goal in 18 of its last 19 matchups.

Yale responded six minutes later, as Bulldogs sophomore Gus Young scored an unassisted goal to even the sides at three. But Killorn’s score later in the period would send the visitors back to New Haven with the loss.

—Staff writer Robert S. Samuels can be reached at robertsamuels@college.harvard.edu.