LIVIGNO, Italy — A big upset in men’s moguls at the Milan Cortina Olympics was decided by a razor-thin margin. Hardly a margin at all, really.

Unheralded Australian freestyle skier Cooper Woods snatched the gold medal away from the sport’s most decorated skier, Mikael Kingsbury of Canada, after both scored 83.71 points in Thursday’s final. The tiebreaker in moguls is the “turns” score, a mark judges base on how cleanly the skiers moved their way through the bumps.

“It was close, a tiebreak, unfortunately I’m the guy not on the good side of it,” Kingsbury said. ”But I’ve worked very hard for this medal. I’m getting older, I’m 33, I had an injury in September. At some point it felt like it was impossible to be back at that level.”

Turns make up 60% of a moguls score — with the two jumps and a racer’s speed counting for 20% each. In this case, turns meant everything. Woods won that element 48.40 to 47.70.

That’s how the Olympic gold ended up in the hands of the 25-year-old Woods, who had managed one podium finish in 51 World Cup events, and silver ended up with Kingsbury, who last month became the first moguls skier to amass 100 wins on the sport’s top circuit.