Cassandra Landis provided such a play.
The junior controlled a ball near the midfield, marched into Trojan territory, made a move to her right and drilled a shot past Olsen just 31/2 minutes into the second half.
Landis' marker was all Dallastown would need, but the Wildcats had to survive a late Suburban penalty kick to garner a 1-0 victory.
"With open field in front of me, all I think about is getting the ball and going," Landis said. "I got my frame right next to the defender and got it where I wanted it. (I liked the shot, but) you are never sure until it gets to the back of the net."
Of course, all thoughts were on overtime when the Wildcats were called for a foul inside the penalty area with 3:40 left to play.
Trojan coach Tom Shugars called on Mikala Kin to take the penalty kick, and the sophomore nailed a great strike past Dallastown keeper Becca Austin, but the ball clanked off the goalpost and bounced away.
"You always have confidence in your goalkeeper. She has been working hard and working on PK shots," Wildcats coach Barry Barbush said. "I knew if it was going to be inside she would have a shot to knock it down.
"PK is a hard one.
An inch or two the other way and the ball likely hits the post and goes in.
"Our girls played well. It's a little tough to take when you didn't get the result," Shugars said. "Still, they played well and that is what I want them to take out of it. We can celebrate some of the little victories."
Barbush wasn't surprised with how close the game was.
"When we played Suburban last year here, it was a tight game. They are a physical team. hey are coached well. The girls have a lot of desire," he said. "I am very confident with our defense. One can win any game for us. Today, I just didn't know for sure."
With Dallastown unleashing seven first-half shots, Olsen was key early.
The senior, who is in her first varsity season as a keeper, robbed Alaina Curry twice in a 35-second span, 12 minutes into the game.
Nine minutes later, Olsen dove on a Maura Loht shot. After that, she made a good stop on Curry, then thwarted Stephanie Le on the rebound.
Three minutes earlier, Duncan slid across the goal line to kick away a Landis shot that was ticketed for the low corner.
"That is two games in a row (Olsen) has been holding teams back. She has come a long way," Shugars said.
Barbush was impressed by Olsen as well, especially for the way she handled the slick ball on the cold, sometimes rainy day.
The Wildcats improved to 3-1 overall after the game, one which they were originally slated to host. But with the field at Dallastown suffering the effects of rain and snow this week, it was moved to the turf at Suburban (2-2).