Olympic champion Alina Zagitova won Friday's free skating program to win her first World Figure Skating Championship title.
Skating to "Carmen", the 16-year-old Russian was inspired by the short program with a powerful free program including a triple lutz, triple toeloop combination in the first half of her program. She added five more triple jumps to finish with 237.50 points.
"I realized that I needed a clean skateboard and I went in every jump determined to put it down," said Zagitova, who also landed at two double axels. "I was very nervous, but the experience of the Olympics has helped me one way or the other.
Elizabet Tursynbaeva became the first woman to win a quadruple jump at the world championships by opening her routine with a quad salchow. Kazakhstan's 19-year-old finished second with 224.76 points.
"I can not believe I landed it," Tursynbaeva said. "He was good at training this morning, I could not do it at the last two competitions, so I was really happy to be able to do it here."
Russia's Evgenia Medvedeva, a two-time world champion and Olympic silver medalist, finished third with 223.80 points.
Canada's bronze medalist, Gabrielle Daleman, placed 11th in 11th place after struggling with mental problems in the past two years.
Daleman, 21, matched the 11th best short program and the 12th ranked free skate for a total score of 192.67 points.
"I consider this free program as such a success," said Daleman. "Yes, the last half was not the best for me, but I am very excited by the way I did the program.
"I am so happy to be back."
Her compatriot Alaine Chartand finished 23rd (148.97 points).
Papadakis, Cizeron, lead ice dance
In ice dance, defending champions Gabriella Papadakis and Guillaume Cizeron of France were first in the rhythmic dance with 88.42 points. Victoria Sinitsina and Nikita Katsalapov were second at 83.94, followed by Russian teammates Alexandra Stepanova and Ivan Bukin, third at 83.10.
Canada pair Kaitlyn Weaver and Andrew Poje are also in contention, finishing fifth with 82.84 points.
"It was a magical experience, but not perfect," Weaver said. "We were very focused."
Other Canadian results include Piper Gilles and Paul Poirier in eighth (80.44) and Laurence Fournier Beaudry and Nikolaj Sorenson placing 10th (74.76). All three Canadian duos qualified for free dance.
Gilles and Poirier adapted their routine for the world championships. "The changes have borne fruit," said Gilles. "We received higher levels on the aspects we were working on and that was a fulfillment for us."
Fournier Beaudry and Sorensen had a wardrobe malfunction when the button that holds the strap to Sorensen's pants at his skates broke.
"That's why we train," said Sorensen. "We've done this dance so many times that even with such a thing, you might not be in the present moment as much as you'd like to be, but we still put together a decent program, we so we are very happy. "
Men's free skating and ice dance are scheduled for Saturday, the last day of competition.