7-7-7 The 21 Card Trick:
Rigged, Recontsructed, and Retro-fitted
by Jon Racherbaumer
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Twenty-One Card Trick is a classic plot in card magic where three piles of seven cards are dealt on the table. The spectator is asked to remember one of the 21 cards. The piles are gathered and re-dealt then the spectator is asked to only identify which pile the card is in. This is repeated one more time and the magician is then able to identify the selected card.
The 21 Card Trick is one of the single best known card tricks by non-magicians. Often when a magician is approached by a lay person who wants to show him a card trick -- it is the classic 21 Card Trick, where a thought-of-card is discovered by a series of deals where the magician or spectator deal three packets of seven cards and eventually reveal the thought-of selection.
But, and this is a big BUT. Within the underground of card magic there have been dozens of variations created where the procedure looks the same to a lay person but the results are impossible. You can literally blow the mind of a spectator by doing the trick he just showed you back to him and fooling him completely. But that is not all. The devious mathematical method has many other applications and they too are discussed, taught and presented here.
As the subtitle, "The 21 Card Trick, Reconstructed, Retro-fitted, Rigged," suggests, this is a collection of most of the best methods and approaches to this plot and method. Contributors include: Jack Parker, Edward Marlo, Steve Draun, Bruce Cervon, Jason Alford, Simon Aronson, Peter Duffie, Max Maven, Mike Powers, Jim Swain, Steve Bryant, Chris Kenner, Paul Gordon, Steve Beam, Bill Miesel, Chuck Smith, Doug Conn, Roger Crostwaithe, Justin Higham and many others.