About the entry to Russia with two passports: one cancelled with a Russian visa and a new one without a Russian visa
According to current Russian legislation, entry to the Russian Federation of foreign citizens and stateless persons holding a cancelled passport with a valid Russian visa and a new passport without such a visa is not allowed.
In such cases foreign citizens or stateless persons are to refer to the Russian consulate that has issued the visa prior to their planned trip to Russia in order to transfer the valid Russian visa from the cancelled passport to the new one.