Card marking
Encyclopedia
Card marking is the process of altering playing card
s such that the suit, rank or both are only apparent to the person marking the cards (or potentially another conspirator), usually for the purpose of cheating at cards
by card sharp
s. To be effective, the distinguishing mark or marks must be done on the obverse side, which are normally uniform. Card marking can sometimes also be called as card bending; it is considered to be the easiest way to mark probably. A cheater marks a card by crimping here. Card marking is often used to cheat when gambling
or for card tricks, though many casinos, particularly those in Las Vegas
, punch holes through the middle of cards they sell to tourists to prevent cheaters from returning to the game tables after buying the cards and then slipping the favorable cards into their hands when playing.
Marked cards can be used regardless of who shuffles and deals the cards. However, some more sophisticated marked-cards scams involve additional manipulative skills to steer the cards into the correct positions once the desired cards have been identified.
Historically, the first attempts to mark playing cards involved bends, crimps and tiny bumps, which are called blisters (and resemble the Braille script). Later, when the first designs appeared on the backs of playing cards, cheats began altering the designs on the backs of cards. Hustlers have tried using various inks, pigments, scratches, etc., to add or remove lines or patterns from the back of the card design. Some varieties of card marking include block-out work, cut-out work, scroll work, shade work, tint work, etc. Here is a simple example of how block-out works and die in a hole cup. can be done.
However, more recently, science and technology have also enhanced marked-card techniques. The most state-of-the-art technologies are variations of shade techniques. These new technologies are the most deceptive and futuristic methods for marking cards. Traditional block-out and/or cut-out work have the disadvantage that they must be read close-up, because the marks are small. On the other hand, another advantage of luminous and juice marked-card technology is that they can be read close-up or from across a table.
Block-out and cut-out work:
Shade technologies:
Video-luminous does not have to be used for cheating. They may be used for magic or by a poker house or person who may want to analyze a card game after the fact. If collusion is suspected, the recorded images of the marked cards may be played back later to detect any unusual play. If a player consistently folds a good hand when a partner plays a better hand, then it can be assumed that collusion is taking place in the game. Since these marks cannot be seen by the human eye, there is no chance of detection of the marks, even by knowledgeable players, during the game. Often such marked decks will only be introduced by the house when suspected colluders are seated.
It is not necessary to mark the entire deck in order to gain an advantage in most types of poker - even marking just one rank (especially the aces) is enough to gain a significant advantage in a game such as Texas hold 'em
.
2) Reflect light off the back of the card. Cut-out work (scratches or white ink) will display, as well as many inks or solutions that tend to dull the finish on playing cards because they are alcohol-based. Only the highest quality solutions will not burn the finish of cards. Placing a drop of alcohol on a card and then looking at the finish by reflecting light off the back reveals the dulling effect that these cheap solutions can cause.
Playing card
A playing card is a piece of specially prepared heavy paper, thin cardboard, plastic-coated paper, cotton-paper blend, or thin plastic, marked with distinguishing motifs and used as one of a set for playing card games...
s such that the suit, rank or both are only apparent to the person marking the cards (or potentially another conspirator), usually for the purpose of cheating at cards
Cheating in poker
Cheating in poker is any behavior outside the rules that is intended to give an unfair advantage to one or more players.-Types of cheating:Cheating can be done many ways, including collusion, sleight-of-hand , or the use of physical objects such as marked cards or holdout devices.Cheating occurs in...
by card sharp
Card sharp
A card sharp is a person who uses skill and deception to win at poker or other card games...
s. To be effective, the distinguishing mark or marks must be done on the obverse side, which are normally uniform. Card marking can sometimes also be called as card bending; it is considered to be the easiest way to mark probably. A cheater marks a card by crimping here. Card marking is often used to cheat when gambling
Gambling
Gambling is the wagering of money or something of material value on an event with an uncertain outcome with the primary intent of winning additional money and/or material goods...
or for card tricks, though many casinos, particularly those in Las Vegas
Las Vegas, Nevada
Las Vegas is the most populous city in the U.S. state of Nevada and is also the county seat of Clark County, Nevada. Las Vegas is an internationally renowned major resort city for gambling, shopping, and fine dining. The city bills itself as The Entertainment Capital of the World, and is famous...
, punch holes through the middle of cards they sell to tourists to prevent cheaters from returning to the game tables after buying the cards and then slipping the favorable cards into their hands when playing.
Marked cards can be used regardless of who shuffles and deals the cards. However, some more sophisticated marked-cards scams involve additional manipulative skills to steer the cards into the correct positions once the desired cards have been identified.
Historically, the first attempts to mark playing cards involved bends, crimps and tiny bumps, which are called blisters (and resemble the Braille script). Later, when the first designs appeared on the backs of playing cards, cheats began altering the designs on the backs of cards. Hustlers have tried using various inks, pigments, scratches, etc., to add or remove lines or patterns from the back of the card design. Some varieties of card marking include block-out work, cut-out work, scroll work, shade work, tint work, etc. Here is a simple example of how block-out works and die in a hole cup. can be done.
However, more recently, science and technology have also enhanced marked-card techniques. The most state-of-the-art technologies are variations of shade techniques. These new technologies are the most deceptive and futuristic methods for marking cards. Traditional block-out and/or cut-out work have the disadvantage that they must be read close-up, because the marks are small. On the other hand, another advantage of luminous and juice marked-card technology is that they can be read close-up or from across a table.
Block-out and cut-out work:
- In brief, block-out work is simply using the same color ink as the back of the card and coloring in small white areas of the card. For example, sometimes people add ink to the flowers on the back of a card by making the petals narrower or blocking out a bird on the back design.
- As far as cut-out work is concerned, people sometimes use a razor to scrap off some of the printed areas of the card. A good example would be to use a razor to scrape off the print on the card. This results in adding (cutting out) a white bird to the back design.
Shade technologies:
- Luminous marked cards - These can only be read by using special gimmicked sunglasses or by wearing contact lenses. The original luminous systems used red lenses and greenish ink on the back of red cards. New luminous technology, called Ultra-Luminous, uses far more sophisticated techniques that are based upon different chemical and optical scientific principles than the original luminous systems.
- Video-luminous marked cards - As stated above, luminous marked cards are designed to be read by the human eye with the use of filtered sunglasses. However, recently, a new generation of luminous technology has become available. Video-luminous uses marks that can not be seen by any human being, even if they are looking through a luminous filter. The marks can only be read by using custom-designed electronics and filters and displayed on a TV monitor in another room to a partner. Then the card values may be signaled or transmitted to the player who needs to know.
Video-luminous does not have to be used for cheating. They may be used for magic or by a poker house or person who may want to analyze a card game after the fact. If collusion is suspected, the recorded images of the marked cards may be played back later to detect any unusual play. If a player consistently folds a good hand when a partner plays a better hand, then it can be assumed that collusion is taking place in the game. Since these marks cannot be seen by the human eye, there is no chance of detection of the marks, even by knowledgeable players, during the game. Often such marked decks will only be introduced by the house when suspected colluders are seated.
- Juice-marked cards - The marks are only visible when a person is trained to read the marks (no filtered sunglasses are required, but some practice is required to read the marks). Glasses can be used to make it easier to spot these marks.
- Tintwork or shade - This technique uses a tint solution to mark cards, but the marking patterns vary depending upon the back design of the cards being marked.
- Daub - A special paste is used by a player to mark someone else's deck, on the fly, while the cards are being used during a game and even while being watched. This eliminates the need to switch in a pre-marked deck of cards.
- Juice dust - An advanced type of daub, it may be used to make an ad-hoc juiced deck. Like daub, it also allows a player to mark someone else's deck, on the fly, while being watched. The main advantages of juice dust are that it will not dull the finish of the cards and that it works on both paper and 100% plastic playing cards.
It is not necessary to mark the entire deck in order to gain an advantage in most types of poker - even marking just one rank (especially the aces) is enough to gain a significant advantage in a game such as Texas hold 'em
Texas hold 'em
Texas Hold 'em is a variation of the standard card game of poker. The game consists of two cards being dealt face down to each player and then five community cards being placed face-up by the dealer—a series of three then two additional single cards , with...
.
Detecting marked cards
1) Perform the gamblers' riffle test (also known as "going to the movies"). This test allegedly allows a person to detect most marked decks by simply riffling the cards. Looking at the back of the cards while they are being riffled, the marks will allegedly dance around the back of the cards like an old-fashioned cartoon. In fact, one must know exactly what marks to look for, or this method of detection may not work. The riffle test is less effective for detecting cards marked with luminous and juice.2) Reflect light off the back of the card. Cut-out work (scratches or white ink) will display, as well as many inks or solutions that tend to dull the finish on playing cards because they are alcohol-based. Only the highest quality solutions will not burn the finish of cards. Placing a drop of alcohol on a card and then looking at the finish by reflecting light off the back reveals the dulling effect that these cheap solutions can cause.