From Troubled Water: A Journey Around the Black Sea, by Jens Mühling (Armchair Traveller series; Haus, 2022), Kindle pp. 14-15:
The Black Sea is bounded by six states. Clockwise, in the order I visited them, they are Russia, Georgia, Turkey, Bulgaria, Romania, and Ukraine.
Six and a half, if you count Abkhazia, a renegade part of Georgia that is kept on life support by Russia to prevent Georgia from joining any Western alliances.
Seven, if you count Moldova, formerly known as Bessarabia, which lost its coastline in the Second World War when Stalin moved the border inland.
Seven and a half, if you count Transnistria, a renegade part of Moldova, which is kept on life support by Russia to prevent Moldova from joining any Western alliances.
Eight, if you count Poland – the old Poland at its point of maximum expansion when szlachta noblemen persuaded themselves that their country’s ruling class was descended from the Sarmatians, an ancient barbarian tribe.
Eight and a half, if you count the Donetsk People’s Republic, a renegade part of Ukraine, which… you can fill in the rest.
Eight and a half, if Crimea belongs to Ukraine. Eight and a half, if Crimea belongs to Russia. Nine, if you’d prefer to let Crimea stand alone.
Nine and a half, if you count the ruined empire of ancient Greece, whose vestiges I encountered on every shore in the form of weathered stones; in place names mangled by foreign tongues; in family stories of scattered Black Sea Greeks; on the menus of countless Aphrodite Restaurants, Poseidon Cafés, Olympus Hotels and Amazon Bars, written in Cyrillic, Latin, and Georgian letters; and in the deep-seated Black Sea tradition of always expecting the worst from your neighbours.