It was the second straight year that the regular-season meeting between the Blue Devils and Tar Heels went into overtime.
Duke improved to 9-6, 3-4 in the Atlantic Coast Conference. North Carolina fell to 12-3, 5-2.
Maurer and Sydney Peterson (Notre Dame Prep) each had three goals for the Blue Devils. Duke's defense limited host North Carolina to its second-lowest scoring output of the season.
Abbey Friend and Molly Hendrick each scored twice for the Tar Heels.
No. 6 Boston College 16, Vermont 11: Covie Stanwick (Notre Dame Prep) had two goals and a career-high six assists to lead the Eagles (12-4) past the host Catamounts (10-5).
Mikaela Rix and Sarah Mannelly each scored four goals for Boston College, which opened the game with a 7-0 run.
Boston College will host the ACC championship April 24-27 at Alumni Stadium.
Erin McMunn (Winters Mill) had a hat trick for Princeton.
Virginia fell behind 4-3 midway through the first half, then the Cavaliers went on a 6-0 run and never trailed again.
Albany led 6-0 after the first seven minutes. The Great Danes outscored Columbia 9-2 in each half.
No. 5 Johns Hopkins 10, UMBC 6: Dene' DiMartino had a hat trick in the first half and Sammy Cermack had hers in the second half to power the Blue Jays (12-2) past the Retrievers (7-7).
DiMartino scored the first two goals about five minutes apart and finished her hat trick with 10:10 left in the first half. Johns Hopkins led 3-0 before Alyssa Semones (Westminster) scored the first of her three goals with 13:11 left in the half.
UMBC closed to within a goal when Kristen Bilney (Mount Hebron) scored with 13 seconds left in the half.
But in the second half, Cermack started the scoring with 28:09 let and host Hopkins led 8-4 after a 3-0 run.
Salisbury 9, Marymount 4: Megan Wallenhorst (Centennial) had two goals and an assist as the visiting Sea Gulls (16-0, 7-0 Capital Athletic Conference) broke a 1-1 tie by scoring five straight in the first half. Courtney Oehl led the Saints (8-6, 2-4) with three goals.
Katelyn Blondino, Shelby Nemecek (Liberty) and Kylie Hanley (Dulaney) also scored two goals each for Salisbury.
York 11, St. Mary's 5: The Spartans (12-3, 5-1 CAC) opened with a 2-0 run and never trailed. The host Seahawks (7-8, 3-3) have lost their last three. Christy Bishop (Glenelg) and Tori Poffenberger each scored twice for St. Mary's.
McDaniel 12, Dickinson 11: Julia Jacobs (St. Mary's) scored the eventual game-winner with 6:10 left in the game for a 12-9 lead, and the host Green Terror (8-5, 4-3 Centennial Conference) held on to beat the Red Devils (8-6, 3-3).
McDaniel broke a 7-7 tie in the second half with a 3-0 run.
Washington College 11, Haverford 6: The Shorewomen (8-4, 4-2 Centennial) outscored the host Fords (7-6, 3-3) 9-3 over the final 30 minutes.
Emily Hubley led Washington College with four goals.
Immaculata 22, Notre Dame Maryland 12: The host Gators (2-11, 1-6 Colonial States Athletic Conference) ended their season on a five-game losing streak. The Mighty Macs (8-7, 5-3) had previously clinched a playoff berth with a 21-11 win over Gwynedd-Mercy on Saturday.
Frostburg State 15, St. Vincent 13: The Bobcats (4-11) put together an 11-0 run that spanned both halves and withstood a six-goal rally by the Bearcats (9-3).
Megan White started the run with 12:24 left in the first half and Molly Hart (Howard) finished it with 21:44 left in the game. White and Malory Brunett (River Hill) each had three goals for Frostburg.
Salisbury 15, Marymount 3: The Sea Gulls (14-1, 5-1 CAC), led by Rhett DePol (St. Mary's) with a game-high five goals, scored the first 12 goals and cruised past the host Saints (8-5, 1-4).
Marymount got on the scoreboard with 8:52 left in the third quarter when Jared Nelson fed Matt Justice. The Saints added two more goals in the third quarter.
Stevenson 9, Widener 7: Stephen Banick scored twice and the host Mustangs (13-1, 6-0 Commonwealth Conference) scored the last three goals to pull away from the Pioneers (7-5, 5-1).
York 18, St. Mary's 11: Ben Love (McDonogh) had three goals and three assists in a losing effort for the visiting Seahawks (7-8, 3-3 CAC).
The Spartans (13-3, 5-1) used tough defense to hold St. Mary's to two goals in the first half.