Maine Central Institute's Addi Williams (4) celebrates her first half goal against Boothbay Regional High School with teammates in the Class C North semifinal Saturday at Thomas College in Waterville.

Maine Central Institute's Addi Williams (4) makes a pass as she is defended by Boothbay Regional High School's Hali Goodwin in a Class C North semifinal Saturday at Thomas College in Waterville.

Maine Central Institute's Addi Williams (4) collides with Boothbay Regional High School goalie Erica Eames (1) in the first half of the Class C North semifinal Saturday at Thomas College in Waterville.

Maine Central Institute's Addi Williams, left, scores on Boothbay Regional High School goalie Erica Eames, center, in the first half of the Class C North semifinal Saturday at Thomas College in Waterville.

Maine Central Institute's April McAlpine, left, looks to score on the rebound as Boothbay Regional High School goalie Erica Eames (1) tries to protect the cage in a Class C North semifinal Saturday at Thomas College in Waterville.

Maine Central Institute's Addi Williams makes a pass in front of Boothbay Regional High School goalie Erica Eames (1) in a Class C North semifinal Saturday at Thomas College in Waterville.

Maine Central Institute's Madisyn Hartley, right, battles for the ball with Boothbay Regional High School's Sydney Meader, left, in the first half of a Class C North semifinal Saturday at Thomas College in Waterville.

The Boothbay Regional High School field hockey team warms up under the lights before a Class C North semifinal Saturday at Thomas College in Waterville.