Edge sorting is a technique used in advantage gambling where a player determines whether a face-down playing card is likely to be low or high at casino table games by observing, learning, and exploiti
A deck of cards with an asymmetrical back pattern may be susceptible to edge sorting, if the pattern is the same on every card. A card which has been rotated 180 degrees (here, the third card from the left) will become visibly distinct from one which has not.