I'm trying to figure out whether, if not for the July crisis, Russia could have tried an amphibious invasion of Turkey in 1914, and what the outcome would have been if so.
It seems to me the answer could depend at least somewhat on where Turkey's warships are located. In particular, if they are not already in the Black Sea, then the Russians could try laying mines at the exit from the Bosphorus, to prevent the Turkish Navy sailing out to interdict the Russian transports.
Where were the Ottoman warships based, in July 1914?