Kostenko led a clean sweep of the medals for the hosts in the women’s competition, whilst Mamaev led a Russian one-two in the men’s event.
As the women’s qualifiers started, three Russian snowboarders Anastasia Loginova, Elizaveta Bogdanova and Kostenko topped the standings after the first attempt. Loginova scored 78.50 points and was ahead of her competitors by a large margin.
In the second attempt, the leaders did not improve their results significantly, but their opponents did not take advantage as six snowboarders reached the final, four coming from Russia.
Kostenko won the gold medal after scoring 76.75 in her second run, Loginova took the silver scoring 71.25 in both her final runs, ahead of Kosova in bronze scoring 68.75 in her first final run.
In the men’s competition, Mamaev of Russia won the gold despite scoring just 26.25 in his first final run.
At that point, Vladislav Khadarin was leading, having performed brilliantly to score 92.00 points. However, it was the second attempts that decided the outcome as Khadarin was not able to improve his result, while Mamaev showed excellent technique to receive 95.00 points and top spot on the podium.
Axel Thelen of Finland won the bronze medal after scoring 89.25 in his second run.
It was also the final contest in the biathlon with the mass start events, and it was Espen Uldal from Norway who carried off the gold medal in the men’s event.
The Norwegian’s time of 40:18.7 (2) earned him the top honours and was a comfortable distance ahead of Maksim Varabei of Belarus who took silver with a time of 40:54.1 (3). Adam Vaclavek from the Czech Republic claimed the bronze medal in 41:15.2 (4).
Ekaterina Moshkova won the women’s mass start, in doing so becoming a three-time champion at this year’s Winter Universiade.
The Russian dominated the race, finishing in a time of 32:59.1 (3), ahead of Elizaveta Kaplina who had to settle for silver with a time of 42.09.7 (2). Another Russian, Elena Chirkova, claimed bronze coming in a minute behind the runner-up in 43.09.9 (3).
Sweden followed up their gold medal success on Saturday in the women’s bandy final with a similar top-of-the-podium success in the women’s curling.
Held at the Ivan Yarygin Sports Palace, the Swedes beat South Korea 8-3 in the gold medal decider. Russia beat the United Kingdom’s side 12-5 to take the bronze.
On Saturday, Mai Mihara of Japan won the last gold medal in this year’s figure skating competitions.
Following the results of the short programme, Mihara led from Russian Stanislava Konstantinova and another Japanese skater Hina Takeno.
Takeno’s appearance on the early leaderboard came as a surprise to many given she does not yet feature prominently in the world rankings with her best result at international level a sixth place at the junior stage of the Grand Prix.
But Takeno proved her worth and was 0.12 points ahead of the much more highly rated Elizabeth Tursynbayeva of Kazakhstan.
Tursynbayeva, however, turned things in favour in the free skating with a nearly flawless performance for which she received a high score from the judges. She finished with a total of 214.77 points for the two programmes, enough to take her into silver medal position, but not enough to outdo Mihara whose 220.68 points return saw her take gold.
Russian Stanislava Konstantinova took bronze with a score of 205.91.