St. Louis ? Stanford kept switching defenders on Jeff Boschee.

Boschee just kept sinking three-pointers.

Kansas University’s senior shooting guard sank five of eight perimeter shots Saturday night at the Edward Jones Dome and finished with 19 points in the Jayhawks’ 86-63 victory over Stanford in the second round of the Midwest Regional.

Stanford’s players will tell you it’s tough defend a player when you can’t get near him.

“I had some great screens out there,” Boschee said. “Nick Collison did a great job of burying Barnes.”

Starting guard Julius Barnes is the same height as Boschee (6-foot-1), but the matchup was one-sided. Boschee’s first three-pointer capped a game-opening 15-0 run.

“It happened so fast,” Stanford center Curtis Borchardt said.

Actually, the opening blitz took only 4:49.

With KU leading 17-6, Boschee hit two more treys in a span of three possessions as the Jayhawks stretched their lead to 23-9.

Forward Casey Jacobsen, arguably the Cardinal’s best player and five inches taller than Boschee, also failed to cool down the Jayhawk guard.

“They head-hunt for him,” Jacobsen said. “I got screened hard. That’s what you call discipline within an offense. That’s called playing to your strengths. When he hit his first two threes, the screens got even harder.

“He’s one of the best three-point shooters in the college basketball, and he got open shots tonight. He had shots where there wasn’t a defender within four or five feet of him.”

Josh Childress, a 6-8 swingman, was Boschee’s next dance partner. The Stanford freshman didn’t fare a lot better than his teammates.

“He’s got long arms,” Boschee said. “He’s a tall kid. For me to be small on the floor, being guarded by a 6-8 guy, I have to use my head and be able to use those screens.”

Boschee was smart. He gave up the ball when he didn’t have a shot and finished with five assists and no turnovers in 35 minutes.

The senior said he was motivated by comments Stanford players made after KU’s 70-59 victory over Holy Cross on Thursday that implied the Jayhawks were not as good as advertised.

“I took it a little bit personally,” he said. “I took that to heart and came out motivated. It helped me get up for this game. I didn’t want this to be my last game in a Kansas uniform. I wanted to come out and play as hard as I possibly could.”

While teammate Kirk Hinrich  who logged a whopping 21 minutes despite playing hurt  might have the most famous ankle in college basketball today, Boschee has been playing on a sore left ankle in recent games.

“My ankle feels fine right now,” said Boschee, who admitted the ankle is tender at times. “Once I get into the flow of the game and get some adrenaline moving through it, it really doesn’t bother me.”