Introduction.

The European Union, Russia and Turkey (EU-RU-TU) share common geopolitical interests within the Black Sea region. Тheir bilateral relations significantly change from conflict to cooperation and vice versa. This analysis explores the reasons for such current changes in the dependence between their internal needs and external attractiveness for partnership. It figures out what each actor aims to achieve in their relations with the other two, why, and what defines their capacity to implement it.