The twenty-one card trick is an Illusion effect where the Conjurer deals twenty-one playing cards and into three card value face up piles of seven cards each. The participant is then asked to try and remember any of the cards viewed. The participant is not supposed to tell the magician which card is being thought of, but advises which stack the card is in. This is executed three times, at which point the magician is able to tell the participant which card they had in mind. The cards are doled out into the piles one after another, like when dealing out hands in a playing card game.
Every time they are dealt, after the participant indicates which stack contains the playing-card in mind, the magician places that pile between the other two. After the first time, the playing card will be one of those in positions eight to fourteen. When the cards are dealt the second time, the choice will be the third, fourth or fifth playing card in the stack. In picking up the stacks, the magician places this stack between the other two once again. This guarantees that the choice will now be one of those in position ten to twelve.
Upon the third occasion the playing cards are dealt out, the choice will be the fourth playing card in which ever pile the playing card ends up. On the third deal, as soon as the participant points out which stack contains the choice, the magician knows that it is the fourth, or centre, playing card in that stack. If the magician collects up the piles again, as before with the pile comprising the selection in the middle, the choice will be the eleventh card in the twenty-one playing card packet.
Article by Roger Burton of http://www.magic-tricks-information.com (The resource for magic trick information)
Author:: Roger Burton
Keywords: : magic tricks, card tricks, playing card, Illusion, Conjurer
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