MOSCOW, September 16 Skier Anastasia Prokofieva (nee Rygalina) has become the winner of the 15 km classic style race at the Russian Summer Championship (roller skis), which takes place in Tyumen. Prokofieva covered the distance in 37 minutes 56.7 seconds. The second place was taken by Elizaveta Pantrina, 5.6 seconds back, the third was Ekaterina Smirnova (+8.5). Olympic champion Yulia Stupak finished 13th (+2.04.1). Natalya Nepryaeva did not start. The tournament will end on September 20th. Later on Friday there will be a men's 20 km classic.