You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
alternatehistory.com
As it says on the tin. No current European monarch descends from the man who is arguably one of Hungary's greatest kings. Your challenge is (with no earlier POD than Matyas' death (sorry, letting his legitimate child with Katharina Podebrady survive would make it too easy ) to let a future king of Hungary - whether Habsburg, Jagiellon, Zapolya, Rakoczi somehow descend from Matyas.