Update: Considerable (IMO) visual improvements, some extra information on the map itself, updated historical background.
The continuation of [link]
While the Kingdom of Bohemia lost most of its territories in the First Partition of Bohemia (1479), it was still left with its central territories more or less intact. This was not, however, a show of mercy by the victors, but the result of internal squabbling among them over who would get the Crown of St. Wenceslaus.
Several of the parties involved had at least semi-legit claims to the crown , be it through inheritance, marriage or elective process, and did not want to yield the crown to someone who might be their enemy the next day. Had it not been for Papal intervention, the dispute might well have escalated into yet another full-scale war, this time between the Emperor and the King of Hungary .
The compromise that was agreed on in the end was acceptable to most of the parties involved , but did not make any of them happy. The Pope had intervened in order to prevent Matthias Corvinus and the Emperor from waging war on one another so they could instead focus their attention on the Turkish threat to the east. This being the case, neither of the two could be the recipient of the Bohemian crown. Ladislaus Jagiellon was also out of the question, as recognizing the rights of someone who had opposed a Crusade sanctioned by the Papacy would also result in a loss of face for the Pope.
The most suitable candidate remaining, Albert III of Meissen, was thus offered the crown. He did, however, have to agree to certain demands before he could ascend to the throne:
1. Bohemia and Meissen had to remain separate. (Ruled in personal union.)
2. He had to reside in, and rule from, Prague.
3. Territories seized by Meissen in the Second Bohemian Crusade had to be returned to Bohemia.
4. He had to destroy or convert what remained of the Ultraquists in Bohemia.
Albert III accepted and was crowned King Albert II of Bohemia on January the 12th, 1481. As the King of Bohemia, he also gained the title of Arch-Cupbearer of the Holy Roman Empire and the electoral vote that accompanied it.
Ladislaus the Posthumous, a Habsburg, had been King of Bohemia until his untimely death in in 1457, and the Emperor based his claims to the throne on family ties.
Matthias Corvinus of Hungary had married one of the daughters of George of Podiebrad, former King of Bohemia, in 1463, and based his claims to the throne on marriage ties.
Albert III "the Bold" of Meissen had married another of the daughters of George of Podiebrad in 1464, and also based his claims to the throne on marriage ties.
Ladislaus Jagiellon had been elected King of Bohemia by Podiebrad's followers after his death, and had been King of Bohemia since that time, continuing the fight against the invading armies of the crusaders. Had he sued for peace upon ascending the throne, he might have been able to keep the throne, but the crusaders were unwilling to forgive him for protecting the Hussites. (Or so they claimed.)
The two were not exactly on good terms to begin with, the former refusing to recognize Matthias Corvinus as the rightful King of Hungary.
Ladislaus Jagiellon would continue to fight for his right to the Bohemian throne until his death in 1516.