Problem 57180:
Problem 57180:
Gor Airapetian (2442) - Oleg Bykov (2401)
72nd ch-RUS HL 2019 Yaroslavl RUS, 2019.06.30 Airapetian - Bykov, Yaroslavl 2019
72nd ch-RUS HL 2019 Yaroslavl RUS, 2019.06.30 Airapetian - Bykov, Yaroslavl 2019