Thirty-one (also known as Thirty-one Knock, Big Tonka, Blitz or Scat) is a
card game played by two to seven people. The game is usually best played with at least four players. The object of Thirty-one is to obtain a hand with a point value closer to 31 than the hands of one's opponents. The game can also be called skedaddle or snip snap snoop.
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