So, amassing what little motivation I have left, this is a rough outline of a possible timeline.
1761: Friedrich II of Prussia dies during the siege of Bunzelwitz, which surrenders to the Russians. Following him to the throne is his younger brother Heinrich (as king Heinrich I). Despite his best efforts and valiant battles, Prussia completely collapses in 1762 and is partitioned.
Silesia (and assorted territories around the Rhine) go to Austria once more, East Prussia is annexed by Russia, France gains Neuenburg, monetary compensation (which does not help) and the confidence that at least it didn't lose in Europe (which does not help either). Saxony and other co-belligerents gorge themselves on what is left. Heinrich however keeps the electorate of Brandenburg.
1763: Tsarina Екатери́на II trades with Poland-Lithuania Kurland and Zemgale for East Prussia.
1777: War of Bavarian Succession: after a series of minor battles against assorted princes, Joseph II. annexes large parts of Lower Bavaria and the Upper Palatinate. In return, Elector Karl Theodor gains Upper Austria and a huge monetary compensation.
1780: Maria Theresia dies, Joseph II. becomes sole emperor.
1782: When Joseph attempts to cut another deal with Karl Theodor, Saxony, Hanover, and other principalities form the Fürstenbund (Prince's League) to limit Austrian power concentration (which Russia backs).
1783: When Russia attempts to cut off more territory off Poland-Lithuania, Joseph II. sees his chance for a quick victorious war, supports Stanislas II August.
1784: Revolts in many parts of the Habsburg Realm force Joseph to a compromise peace: Russia no longer backs the Fürstenbund, while Joseph no longer objects to Russia gaining territory on Poland's expense. Russia promptly annexes large swathes of Lithuania.
1785: After forcing through the exchange of all Bavaria for the Austrian Netherlands against princely opposition, Joseph II. starts another round of internal reforms. Meanwhile, Karl Theodor is crowned as king Karl IV. of the kingdom of Burgundy.
1785-1789: Continuous uprisings through the Habsburg possessions due to Joseph's badly done reforms.
1787–1792: Russo–Turkish War. At the end of the war, the Ottoman Empire is forced to recognize Russia's annexation of the Crimean Khanate, while the Ottoman-Russian borders stay the same.
1788: Suffering from and his failures before his eyes, Joseph II. dies in Vienna. Leopold II. ascends to the thrones.
1789: Despite all the changes of this timeline, French Revolution occurs relatively on time.
Thoughts so far?
1761: Friedrich II of Prussia dies during the siege of Bunzelwitz, which surrenders to the Russians. Following him to the throne is his younger brother Heinrich (as king Heinrich I). Despite his best efforts and valiant battles, Prussia completely collapses in 1762 and is partitioned.
Silesia (and assorted territories around the Rhine) go to Austria once more, East Prussia is annexed by Russia, France gains Neuenburg, monetary compensation (which does not help) and the confidence that at least it didn't lose in Europe (which does not help either). Saxony and other co-belligerents gorge themselves on what is left. Heinrich however keeps the electorate of Brandenburg.
1763: Tsarina Екатери́на II trades with Poland-Lithuania Kurland and Zemgale for East Prussia.
1777: War of Bavarian Succession: after a series of minor battles against assorted princes, Joseph II. annexes large parts of Lower Bavaria and the Upper Palatinate. In return, Elector Karl Theodor gains Upper Austria and a huge monetary compensation.
1780: Maria Theresia dies, Joseph II. becomes sole emperor.
1782: When Joseph attempts to cut another deal with Karl Theodor, Saxony, Hanover, and other principalities form the Fürstenbund (Prince's League) to limit Austrian power concentration (which Russia backs).
1783: When Russia attempts to cut off more territory off Poland-Lithuania, Joseph II. sees his chance for a quick victorious war, supports Stanislas II August.
1784: Revolts in many parts of the Habsburg Realm force Joseph to a compromise peace: Russia no longer backs the Fürstenbund, while Joseph no longer objects to Russia gaining territory on Poland's expense. Russia promptly annexes large swathes of Lithuania.
1785: After forcing through the exchange of all Bavaria for the Austrian Netherlands against princely opposition, Joseph II. starts another round of internal reforms. Meanwhile, Karl Theodor is crowned as king Karl IV. of the kingdom of Burgundy.
1785-1789: Continuous uprisings through the Habsburg possessions due to Joseph's badly done reforms.
1787–1792: Russo–Turkish War. At the end of the war, the Ottoman Empire is forced to recognize Russia's annexation of the Crimean Khanate, while the Ottoman-Russian borders stay the same.
1788: Suffering from and his failures before his eyes, Joseph II. dies in Vienna. Leopold II. ascends to the thrones.
1789: Despite all the changes of this timeline, French Revolution occurs relatively on time.
Thoughts so far?