The game, which took place in Tula, ended with a score of 2: 1 in favor of the Black Sea team.
The goals were scored by Mateo Casierra (2nd and 79th minutes) and Evans Kangwa (66th).
Chief referee Pavel Shadykhanov from Moscow showed four yellow cards.
Sochi (24 points) ranks third in the RPL standings.
Arsenal (12) are on the 14th line.
Zenit is the leader in the championship (29).
Earlier it was reported that Ufa outplayed Akhmat Grozny at home in the match of the 13th round of the Russian football championship.