"We just played our game," Panthers coach Rachel Busza said. "We took our time on attack and looked for good shots. Defensively, we pressured the ball and took advantage of turnovers."
The one-goal win was the second straight in the tournament for the Panthers (16-9), who advance to Tuesday's semifinals against Penn Manor, a 12-6 winner over Pine Richland.
Radnor (21-4) had an easier quarterfinal matchup, whipping Cocalico, 20-3, at Exeter.
Natalie Miller's five goals and four ground balls combined with a defense that allowed just five shots at goalies Grace Collins and Colleen Packer. Miller, a senior headed to Georgetown, scored three goals in the game's first two minutes.
Ben Junior collected four goals, and Peter Donato added two goals and an assist for Radnor in a 12-3 triumph over Manheim Township in the PIAA state tournament quarterfinals at Exeter Township.
In the second game of the doubleheader at Exeter, District 1 champ Conestoga bounced Carlisle from the tournament with a 12-6 verdict.
Pennridge was two points from a state championship before Chambersburg rallied to beat the Rams, 23-25, 25-20, 15-25, 25-23, 15-11, in the PIAA Class AAA state tournament finals at Penn State.
Pennridge, which had suffered a 25-14, 25-18, 25-23 loss to the the Trojans in Friday's pool play, rebounded a day later and won two of the first three games.
The District 1-champion Rams led by two games to one and 23-22 in the fourth before Chambersburg got back in the match with three straight points to end the game, forcing a fifth and deciding game.
Pennridge reached the final with a 25-18, 25-21, 26-28, 23-25, 15-9 semifinal win over Central Dauphin earlier in the day.