Quadrat (patience)

Quadrat[1] ("Square") or Viereck[2] ("Rectangle") is a simple, German patience game, which is played with a French pack of 32 or 52 cards.

Zudecken ("Covering") is a very similar patience with slightly altered rules.

The top four cards are picked up and placed face up on the table in a tableau the shape of a rectangle.

[3] The game ends if there is one card of each suit in the tableau and thus no pairs can be removed or covered.

[2] The patience is only solved if the stock is completely used up and all the cards have been cleared.

Quadrat under way: the two top cards are both in the suit of Clubs and may be covered or removed.
End of the game: there are no pairs left and the patience has not come out.