Dean Smith won by holding the ball to run out the clock

College basketball before 1985 had no shot clock: a team in possession of the ball could hold it indefinitely without ever being forced to attempt a shot. The rules were written assuming both teams would keep attacking the basket, because scoring was the only lever anyone had ever needed to compete on — the rulebook simply never anticipated a team choosing not to shoot at all.

North Carolina coach Dean Smith, running an offense (Four Corners, originated by John McClendon in the 1950s and refined at UNC) that spread four players to the court's corners and had a ball-handler dribble in the middle, used it not to score but to consume the clock itself once his team held a lead — turning the very absence of a time limit, a structural feature nobody else thought to exploit as a weapon, into the deciding factor in a close game.

In the 1982 ACC tournament championship against Virginia and its 7'4" star Ralph Sampson, Smith went to the Four Corners with UNC leading 44–43 and simply held the ball — his team attempted only one shot (a meaningless Sampson dunk in the final second) across the last 7 minutes and 44 seconds of the game, refusing to give Sampson's defense any possession to work with rather than trying to out-score Virginia in the conventional sense.

With no shot clock, Smith held the ball for the final 7:44, turning the lead into a running clock and denying the opponent any possession — exploiting time itself.

Holding the ball denied the opponent any possession to score, preserving the lead.

The rules had no shot clock, so holding the ball was legal and unstoppable.

The tactic converted the lead into a running clock, eliminating downside risk.

Its success drew criticism and led to the shot clock, showing how exploiting gaps can force rule changes.

When ahead, look for unregulated dimensions (like time) to lock in a win rather than extending the lead on the contested dimension.

North Carolina won 47–45, and the tactic — controversial enough to draw national criticism for making the sport unwatchable — was directly cited as a driving reason the NCAA introduced a 45-second shot clock starting in the 1985–86 season, a rule change that permanently altered how the sport is played by closing off exactly the loophole Smith had exploited.