Editing Trick deck (section)

===Forcing decks===
These decks are used to force a spectator to select a particular card, which the magician already knows in advance. Such a feat can be accomplished using a regular deck and sleight of hand but with the aid of a forcing deck the trick is made [[Self-working magic|self-working]].

One of the simplest forcing decks is the "one-way forcing deck", where all cards are identical (with the possible exception of one or two at the top and bottom of the deck). When using this deck, the magician must be careful to prevent the spectator from seeing the faces of the cards.  The below-mentioned Svengali Deck can also be easily used as a force deck, by forcing the choice of one of the twenty-six identical short cards.<ref name="Henry Hey 1949 p. 310"/>

A variant of the one-way forcing deck is the Monte Cristo deck invented by [[Henry Hardin]], more recently published under the name Mastermind Deck by Chris Kenworthey. All the cards are the identical force card, but misindexed on the top left corner, so that the cards all appear to be different when fanned or spread.  Any card can be selected, and rotating the deck before revealing the selection will always reveal the force card.<ref>{{cite book |title=Ellis Stanyon's Best Card Tricks
 |first1=Ellis |last1=Stanyon |first2=Karl |last2=Fulves |url=https://books.google.com/books?id=AMMDfD_F6_sC&pg=PA206 |page=206 |publisher=Courier |date=1999|isbn=9780486405308 }}</ref>

It is worth noting that such decks have fallen out of favor amongst professional magicians because of an increased suspicion amongst audiences regarding the use of gimmick props. Thus, they are rarely employed.{{citation needed|date=May 2021}}