Sixty-six or Schnapsen is a fast 5- or 6-card point-trick game of the marriage type for 2–4 players played with 20 or 24 cards. First recorded in 1718 under the name Mariagen-Spiel it is the national card game of Austria and also popular in Germany and Hungary.

Closely related games for various numbers of players are popular all over Europe and include Czech/Slovak Mariáš Hungarian Ulti Finnish Marjapussi French Bezique and American Pinochle. Together with the Jack–Nine family they form the large King–Queen family of games.[1]

German Sixty-six is a 6-card game played with a deck of 24 cards consisting of the Ace Ten King Queen Jack and Nine worth 11 10 4 3 2 and 0 card-points respectively. The other major variant is Austrian Schnapsen which does not make use of the Nines and has a hand size of 5 cards. The trump suit is determined randomly. Players each begin with a full hand and draw from the stock after each trick. The object in each deal is to be the first player to score 66 points. The cards have a total worth of 120 points and the last trick is worth 10 points. A player who holds King and Queen of the same suit scores 20 points or 40 points in trumps when playing the first of them.