Abdul Hadi Pasha
Banned
I mentioned before that this is just an indication of what the border might look like west of the Strymon if European Turkey were to be divided in the 1860s. The Russians would simply never accept a Greece extending to the Balkans and the Black Sea, regardless of its chances of actually keeping control over that much territory. I'd expect the region east of the river (except the Straits and possibly Adrianople), as well as some places west of it (maybe even Nis), to be assigned to Bulgaria.
Keep in mind that this is before the Bulgarian Exarchate was founded, so many in Greece would view the Bulgarians coming under their rule as simply Slavified Greeks. The later the division, the greater the Greco-Bulgarian rivalry - and the larger the Bulgarian share of Macedonia.
It was before the Bulgarian Exarchate, but the Bulgarians knew exactly what they considered Bulgarian by 1860. As I've said before, Bulgarian nationalism developed in resistance to Greek domination, not Ottoman.
The idea of Russia dominating a big Bulgaria is a pipe-dream. It would be strong enough to stand on its own and it would reject Russian control just as it did in OTL with a third the territory. The idea of it annexing it is preposterous.
And there is no chance whatsoever that Russia would ever allow Greece to have the Straits or anything near it.
The problem with these scenarios is that there's no chance of making anyone happy. Anything Bulgaria gets will be horrifically resented by Greece and Serbia, and all the various vice versas. Even if Russia picks one to be its client, that one will never feel it got everything it wanted and will resent Russian attempts to control it.
And, this all has to pretend that the all the other powers don't exist and are going to sit around while Russia dominates all of eastern Europe and the Middle East. Even if for some magical reason they're all diverted by something else, the dismemberment of the Ottoman Empire will have such massive consequences that it will inevitably lead to a major war.
Forget not that a huge number of our current problems are the direct result of the end of the Ottoman Empire. That's not going to be any different in 1860 - in fact it will be much worse.