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Kaiserspiel, also called Kaisern or Cheisärä, is a card game, usually for 4 or 6 players, that is played in parts of Switzerland using a variant of the standard Swiss playing cards with 40 or 48 cards. It is a descendant of Karnöffel, one of the oldest card games known. It is sometimes misleadingly called Kaiserjass, although it has nothing to do with the Jass family of games that are popular in Switzerland.