Playing rules are necessary. To explain them all would go beyond the aim of this site and therefore, we have made a list of useful links for some standard games:

Curt of Skat German Skat Association German Bridge Federation German Doppelkopf Association International Skat Players Association Schafkopf Association Card games   rules in English (Ó John McLeod, 1995-2005)

Further information at: Spielearchiv Marburg Spielemuseum Chemnitz German playing card museum Playing card museum Altenburg