Box Score
The University of Minnesota Duluth came into its National Collegiate Hockey Conference series opener with the University of North Dakota Friday night leading the nation in penalty killing efficiency.

Not any more.

No. 13 North Dakota scored twice on the power play, including the eventual-game winner with 10:05  to go in the game and went on to down No. 20 UMD 4-2 in Grand Forks, N.D. The Bulldogs, who  entered the night having given up just three goals to the opposition in 47 opportunities with the man advantage (6.4 percent) trailed 2-0 midway through the third period before freshman left winger Alex Iafallo and junior right winger Adam Krause scored 20 seconds. Iafallo's goal -- his team leading fourth of the season -- came after a shot from freshman center Dominic Toninato hit the former Fargo Force standout in the chest while he was sprawled out and sliding into the North Dakota net. Krause picked up his first collegiate power play goal at 6:57 of the third period when he shoveled in a rebound but North Dakota got the equalizer three minutes later on the power play from Jordan Schmaltz , whose blast from the high slot snuck through traffic and past a screened Aaron Crandall. North Dakota iced the victory with an empty net goal with just under a minute left.

North Dakota's Rocco Grimaldi struck at 17:29 of the first period and the hosts maintained that 1-0 lead until 37 seconds into the third period when Michael Park's wrap around attempt was, after two separate reviews, ruled a goal.

The Bulldogs, who outshot North Dakota 35-17 on the night, dropped to 4-4-1 overall and 1-2-0 in the NCHC. North Dakota is now 4-4-1 on the year as well and 3-4-0 in NCHA play.

The two long-time rivals will meet again on Saturday at 7:07 p.m.

Notes: Dominic Toninato picked up an assist to run his personal scoring streak to four games ... The Bulldogs blocked a season-high 23 shots, including six by sophomore defenseman Willie Corrin, in the setback ... Fifth-year senior Aaron Crandall made his career-high sixth straight start in goal for UMD ... Adam Krause now has three goals as a Bulldog with each coming in different situations (power play, shorthanded and even strength)  ... UMD went 1-for-3 on the power play while North Dakota was 2-for-6 ... Alex Iafallo was named the night's No. 3 Star after figuring in on two of UMD's three goals. He now paces the 2013-14 Bulldogs in points with eight and has marked in the scoring column in four straight outings  ... Junior right winger Justin Crandall returned to the UMD lineup after being sidelined the previous three outings with an upper body injury ... The Bulldogs are 1-5-1 in their last seven visits to Ralph Engelstad Arena.