Zwanzig ab, 20 ab or simply Zwanzig is card game for four players. It is a member of the Rams family in which the key feature is that players may choose to drop out of the game if they believe their hand is not strong enough to take a minimum number of tricks. It appears to be a recent, internet-propagated variant of Schnalzen or Bohemian Watten. However, the latter has a natural card ranking, is played with double German cards and a Weli, has no exchanging and has a different scoring system. It is suitable for children from 8 upwards. It may be related from Fünf dazu! which is a simpler game described by Gööck in 1967 that has neither trumps nor the option to drop out.
