MONTICELLO — Through 21/2 pool play games, Munster looked like a lock to reach the semifinals of the Twin Lakes Invitational on Saturday.

The problem was that Munster’s players might have been thinking the same thing.

After the Mustangs took a 3-0 lead, Class 1A Pioneer scored one run in the fourth and two in the sixth to force the international tiebreaker, then edged Munster 5-4 with a couple runs in the top of the eighth.

It was the only loss for Munster in the tourney after beating Harrison and Delphi in other pool play games.

“We just have to play more aggressively — I don’t think we had the fire for that game,” Munster coach Beth Thornburg said. “Once we got the lead, I think we relaxed. They looked like they were thinking ahead.”

That’s a no-no, but it was still a productive weekend.

“I’m disappointed we lost,” she said. “I would’ve liked a shot at Crown Point, but we’re still playing good softball.”

Winning weekend: Munster wasn’t the only Northwest Indiana squad to post a winning mark at the 16-team tournament. In fact, all five region teams were at least 2-1 in pool play — a first for area entrants in more than 10 years.

Crown Point, of course, went 3-0 to win its pool, while Lowell, Andrean and Hanover also went 2-1. The Red Devils tied for the best record in their pool, but lost the head-to-head tiebreaker to Frontier, which edged Lowell 3-2 in an elimination game with a two-run home run in the sixth inning.

“We haven’t gotten very many key hits all year,” Lowell coach Pete Iussig said. “We put some hits together against Western (8-4 victory), but not much else.”

Iussig did get a compliment about his No. 1 pitcher, Brandi Flaverty.

“The umpire in the morning game said she has the best drop-ball he’s seen,” Iussig said. “He compared it to a split-finger fastball in baseball.”

Hanover looked good in the tourney for the first time since winning in 2009.

“It’s been a long time since we won two out of three,” Hanover coach Larry McMillen said.