Again Alternate History. In this TL, the Magyars ended up decisively defeating the Eastern Roman Empire (because of... stuff), and proceeded to create their own empire while settling around the straights. This shows them at their greatest extent.
Where are the Greeks...? I like the idea, but if the Magyars took over the Eastern Empire, did they just, I don't know, kill all the Greeks living in Anatolia?
And where did those Turks came from? Turks didn't live in Anatolia until Alp Arslan's victory of Mantzikert, when Turkish tribes started coming from the Middle East into Anatolia to settle over the centuries.