Dou dizhu player (landlord/peasant), rocket and/or bomb, no deals played (a.k.a. "spring"). Since there are so many elements affecting score of the game in a round, it is hard to predict how big one will win or lose. The four-player version of "dou dizhu" is played mainly in Zhejiang and Jiangsu provinces, including Shanghai. It uses a double deck, including two red and two black jokers – 108 cards altogether. Each player takes 25 cards and 8 cards are left over for the landlord, who plays alone from a hand of 33 cards against the other three players in partnership. The combinations
Zener cards the experimenter picks up a card in a shuffled pack, observes the symbol, and records the answer of the person being tested, who would guess which of the five designs is on the card. The experimenter continues until all the cards in the pack are tested. Poor shuffling methods can make the order of cards in the deck easier to predict and the cards could have been inadvertently or intentionally marked and manipulated. In his experiments, J. B. Rhine first shuffled the cards by hand but later decided to use a machine for shuffling. In his book, "The New Apocrypha",