The story goes the Samuelson sisters will compete for just about anything -- even who can walk the family dog the fastest.
Such hyper competition at home has made playing in the NCAA tournament a little easier for Stanford's reliable 3-point threats this season.
The second-seeded Cardinal (30-3) probably will call upon the Orange County sharpshooters Monday night in its second-round game against No. 10 Florida State in Ames, Iowa.
With star forward Chiney Ogwumike matched against the Seminoles' talented Natasha Howard, perimeter shooting could be the difference in the game at Hilton Coliseum. Florida State is expected to use a zone defense to try to prevent Stanford from reaching the Sweet 16 at Maples Pavilion next weekend.
The last time the teams played, the Seminoles bounced the Cardinal 68-61 in the second-round of the 2007 tournament at Maples.
Florida State (21-11) stunned No. 7 Iowa State 55-44 on the Cyclones' home floor Saturday to reach the second round. Stanford advanced past South Dakota with the help of junior Bonnie Samuelson's 18 points and a career-high tying six 3-pointers. Freshman Karlie Samuelson added five points.
"We're used to seeing kids who are prolific 3-point shooters but they got so many different weapons," Florida State coach Sue Semrau lamented.
Bonnie had started five consecutive games in the wing position until Saturday. But she leads Stanford with 54 3-point baskets this season while mostly coming in from the bench.
Father Jon Samuelson marvels at her ability to immediately make long shots when entering a game.
"I don't know how she can do it sometimes, coming in cold," he said Sunday. "She seems to have the right mindset to be able to do that."
Jon Samuelson taught his three daughters how to shoot by stressing a quick release. The youngest, Katie, is one of the country's top recruits as a junior at Mater Dei High-Santa Ana. The 6-3½ guard has narrowed her college choices to Connecticut, Kentucky, Notre Dame, Stanford and UCLA.
Basketball has been the center of the Huntington Beach family's life. Jon and Karen Samuelson met while playing professionally for England's Newcastle club.
The parents now teach physical education at a middle school.
Bonnie recalled Sunday going to the gym every day with her family to shoot, play HORSE and play one-on-one games.
"I towered over both of them," the 6-3 player said of her sisters. "It was easy back then. It's super competitive now."
But the sisterly rivalry has made each much better, dog walking notwithstanding.
Karlie's transition to Stanford has been easier with the help of her sister. Karlie decided to attend Stanford because she wanted to stay close to home after the death of an uncle and a grandfather.
Samuelson is part of a deep and talented freshman class that is expected to help keep the Cardinal an elite program once Ogwumike graduates after this season.
"She doesn't act like a freshman at all," Bonnie said.
Karlie Samuelson has made 32 3-pointers this season although the 6-0 guard has been slowed by a foot injury.
Shooting, the Samuelsons say, takes practice and patience.
"It's really not a secret," said Jon Samuelson, a 6-6 guard at Chapman College in the 1980s.
He taught his daughters to follow the same routine every time on the court.
"You shoot every shot with confidence," Karlie added. "But if it is not falling you just keep shooting."
Contact Elliott Almond at 408-920-5865. Follow him on Twitter at twitter.com/elliottalmond.