Grace Ramsdell completed a three-point play with 2:08 remaining to break a tie, and the top-seeded Warriors (18-1) survived an upset bid, defeating ninth-seeded Maranacook (9-10) in a Class B South quarterfinal at the Portland Expo.

Wells scored the final nine points after the Black Bears led 30-28 with five minutes left.

Ramsdell, a 1,000-point career scorer, finished with eight to go with seven rebounds as Maranacook clogged the middle.

After Ramsdell’s three-point play, Grace Boucher hit both ends of a 1-and-1 with 50 seconds left, then two more free throws with 21 seconds to play.

Maranacook trailed by four points at the half and one point through three quarters behind the inside work of Allie LaBelle and the outside play of Eliza Pattershall. They each finished with nine points.

Boucher had 10 to lead Wells, which hit 3 of 23 3-pointers.

The Warriors will meet York (11-5) at 2:45 p.m. Tuesday in the semifinals at the Expo.