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During the course of a game, the player asks the dealer to rotate high-value face-up cards, saying for example that they feel it will bring them luck. The dealer, indulging superstition, does not realize he or she is unwittingly orienting the cards such that valuable high cards are oriented one way in the deck and low cards the other way round. The unintentional card edge irregularity thus makes the high or low value of face-down cards apparent to an observer aware of how the dealer has been tricked into orienting them. This orientation will remain so long as the cards are not "washed," shuffled in a way that rotates them. Thus, the player must also request that the dealer shuffle the cards with an [[Shuffling machine|automatic shuffler]], which does not change the orientation as a manual shuffle might. The dealer is not obliged to comply with any of these requests, but will usually do so if thought to be the result of gambler superstition or mistrust.
Over the course of a game being played this way, low cards will tend to be oriented one way, high cards the other. Once a significant proportion of cards have been rotated, any player who knows this can gain a statistical edge more than outweighing [[house edge]] by using the knowledge whether the card to be turned is likely to be low or high.<ref name=PAMAG>{{cite web|url=http://www.phillymag.com/news/2014/04/14/borgata-poker-star-phil-ivey-cheated-edge-sorting/ |title=Borgata: Poker Star Phil Ivey Cheated Us Out of $10 Million Using Edge Sorting |publisher=Philly Mag |author=Victor Fiorillo |date=14 April 2014 |accessdate=19 April 2014}}</ref><ref name="BaccaratProTips 2023-06-05">{{cite web |url=https://baccaratprotips.com/baccarat-edge-sorting/ |title=Baccarat Edge Sorting |last=Wilson |first=Greg |date=2023-07-05 |accessdate=2023-07-01 }}</ref>
==Legality==
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