'''Edge sorting''' is a technique used in [[advantage gambling]] where a player determinesdeduces the value ofwhether a face-down [[playing card]] is low or high at [[casino]] table games by observing subtle flawsunintentional differences on the backbacks of thesome types of card.<ref>{{cite web|url=http://www.ibtimes.com/what-edge-sorting-phil-ivey-sued-borgata-casino-allegedly-cheated-win-96-million-baccarat-1571442 |title=What Is Edge Sorting? Phil Ivey Sued By Borgata Casino, Allegedly Cheated To Win $9.6 Million In Baccarat |publisher=[[International Business Times]] |author=Thomas Barrabi |date=2014-04-14 |accessdate=2014-04-19}}</ref> ASome playerpacks mayof noticecards distinctproduced by some manufacturers have an unintentional regularity. Typically all the cards in such a pack have long edges dependingwhich onare howsystematically distinguishable, they are not totally symmetric. During the cardcourse of a game, a player will ask the [[Croupier|dealer]], a casino employee, to rotate cards one way if are shown to be, typically, 6, 7, 8, or 9 (low), and the other way if high, perhaps saying they feel it will bring them luck. The dealer is heldalso asked to shuffle the cards with an automatic shuffler, which does not change the orientation. The dealer is not obliged to comply, but will usually do so if the request is thought to be due to gamblers' superstition or mistrust. Over the course of a game, low cards will tend to be oriented one way, high cards the other.<ref>{{cite web|url=http://www.dailymail.co.uk/news/article-2420796/I-read-cards-Im-cheat-U-S-poker-ace-suing-Britains-oldest-casino-denied-8million-win-admits-using-controversial-edge-sorting-technique.html |title='I read the cards but I'm no cheat': U.S. poker ace suing Britain's oldest casino after being denied £8million win admits using controversial 'edge sorting' technique |publisher=[[Daily Mail]] |author=Ian Gallagher |date=2013-09-14 |accessdate=2014-04-19}}</ref> Once thea significant identityproportion of thecards card hashave been determinedrotated, players can significantlygain changea thestatistical mathematicaledge more than outweighing [[house edge]] inby using the knowledge whether the card to be turned is likely to be low theiror favorhigh.<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=2014-04-14 |accessdate=2014-04-19}}</ref>
