PC: A divided "Red" and "Romanov" Russia?

What are the chances that either Persia or Turkey become the new masters of the Caucasus? I lean more to Turkey, but Persia will also try to get back their lost territories in a divided Russia scenario.
Alternatively Persia could ally with White Russia and get a solid ally against Turkey, by allowing and enabling Russian domination of the Caucasus. Or vice versa.
 
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