Cal confused UNLV with 40 minutes of zone defense, which Montgomery couldn't recall employing for such a long stretch since he was at Montana from 1977-86.

NPR: No. 12 Seed Cal Beats No. 5 Seed UNLV 64-61

Boeheim entered Thursday with 50 wins in the tournament, fourth-most in history, and more than 900 victories overall, with so much of that success built on his unusual zone defense, 40 minutes of a puzzle for opponents to try and solve.

WSJ: East: Syracuse tops Indiana 61-50; Marquette next

He entered Thursday with 50 wins in the tournament, fourth-most in history, and more than 900 victories overall, with so much of that success built on his unusual zone defense, 40 minutes of a puzzle for opponents to try and solve.

WSJ: Syracuse's D, Carter-Williams beat Indiana 61-50

"I thought they struggled against it, " Purnell said of the zone defense.

WSJ: DePaul loses 78-57 to No. 17 Syracuse

Pikeville then proceeded to back up into a 2-3 zone defense for the rest of the half where they ballooned to an unheard of 70-0 lead.

FORBES: Superintendent: Pikeville Not Canceling Junior High Basketball Season Over 100-2 Score

And when they get in a groove with their stifling zone defense, especially at this time of year, they are tough to break down.

WSJ: Syracuse focused on journey to Final 4

The zone is usually viewed as more of a passive defense.

WSJ: Contrasting styles on display in Syracuse-Michigan

If Louisville makes it through to next Monday night's title game, the opponent would be either Michigan, sporting a new group of Fab Wolverines, or Syracuse, which comes at you with the stingiest zone defense in college basketball.

WSJ: Final Four set after blowouts and another surprise

Brennan faked a shot at the right point and slid a pass across the zone to defense partner Campbell, who fired a slap shot from the upper inside edge of the right circle that appeared to clip the stick of Rangers defenseman Ryan McDonagh before it sailed past Lundqvist at 8:22.

WSJ: Markstrom, Panthers stop Rangers 3-1