If the dealer does not bust, each remaining bet wins if its hand is higher than the dealer's, and loses if it is lower. When the last hand has finished being played, the dealer reveals the hole card, and stands or draws further cards according to the rules of the game for dealer drawing. The value of cards two through ten is their pip value 2 through Betting on team sports has become an important service industry in many countries. Blackjack , also known as twenty-one , is a comparing card game between usually several players and a dealer, where each player in turn competes against the dealer, but players do not play against each other. Nonetheless, both insurance and gambling contracts are typically considered aleatory contracts under most legal systems, though they are subject to different types of regulation. Estimates of the house edge for blackjack games quoted by casinos and gaming regulators are generally based on the assumption that the players follow basic strategy and do not systematically change their bet size.
As with all casino games, blackjack incorporates a "house edge", a statistical advantage for the casino that is built into the game. The advantage of the dealer's position in blackjack relative to the player comes from the fact that if the player busts, the player loses, regardless of whether the dealer subsequently busts.
The loss rate of players who deviate from basic strategy through ignorance is generally expected to be greater. Surrender, for those games that allow it, is usually not permitted against a dealer blackjack; if the dealer's first card is an ace or ten, the hole card is checked to make sure there is no blackjack before surrender is offered.
This rule protocol is consequently known as "late" surrender. The alternative, "early" surrender, gives player the option to surrender before the dealer checks for blackjack, or in a no-hole-card game.
Early surrender is much more favorable to the player than late surrender. Most medium-strength hands should be surrendered against a dealer Ace if the hole card has not been checked.
For late surrender, however, while it is tempting to opt for surrender on any hand which will probably lose, the correct strategy is to only surrender on the very worst hands, because having even a one in four chance of winning the full bet is better than losing half the bet and pushing the other half, as entailed by surrendering. With no hole card, it is almost never correct basic strategy to double or split against a dealer ten or ace, since a dealer blackjack will result in the loss of the split and double bets; the only exception is with a pair of A's against a dealer 10, where it is still correct to split.
In all other cases, a stand, hit or surrender is called for. For instance, holding 11 against a dealer 10, the correct strategy is to double in a hole card game where the player knows the dealer's second card is not an ace , but to hit in a no hole card game. The no hole card rule adds approximately 0. The "original bets only" rule variation appearing in certain no hole card games states that if the player's hand loses to a dealer blackjack, only the mandatory initial bet "original" is forfeited, and all optional bets, meaning doubles and splits, are pushed.
Each blackjack game has a basic strategy , which is playing a hand of any total value against any dealer's up-card, which loses the least money to the house in the long term. An example of basic strategy is shown in the table below, and includes the following parameters: The bulk of basic strategy is common to all blackjack games, with most rule variations calling for changes in only a few situations. For example, if the above game used the hit on soft 17 rule, common in Las Vegas Strip casinos, only 6 cells of the table would need to be changed: A, surrender 15 or 17 vs.
A, double on A,7 vs. Also when playing basic strategy never take insurance or "even money. Estimates of the house edge for blackjack games quoted by casinos and gaming regulators are generally based on the assumption that the players follow basic strategy and do not systematically change their bet size. Most blackjack games have a house edge of between 0.
Casino promotions such as complimentary matchplay vouchers or 2: Basic strategy is based upon a player's point total and the dealer's visible card. Players may be able to improve on this decision by considering the precise composition of their hand, not just the point total. For example, players should ordinarily stand when holding 12 against a dealer 4. However, in a single deck game, players should hit if their 12 consists of a 10 and a 2.
The presence of a 10 in the player's hand has two consequences: However, even when basic and composition-dependent strategy lead to different actions, the difference in expected reward is small, and it becomes even smaller with more decks. Using a composition-dependent strategy rather than basic strategy in a single deck game reduces the house edge by 4 in 10,, which falls to 3 in , for a six-deck game. Blackjack has been a high-profile target for advantage players since the s.
Advantage play is the attempt to win more using skills such as memory, computation, and observation. These techniques, while generally legal, can be powerful enough to give the player a long-term edge in the game, making them an undesirable customer for the casino and potentially leading to ejection or blacklisting if they are detected.
The main techniques of advantage play in blackjack are as follows:. During the course of a blackjack shoe, the dealer exposes the dealt cards. Careful accounting of the exposed cards allows a player to make inferences about the cards which remain to be dealt. These inferences can be used in the following ways:. A card counting system assigns a point score to each rank of card e.
When a card is exposed, a counter adds the score of that card to a running total, the 'count'. A card counter uses this count to make betting and playing decisions according to a table which they have learned. The count starts at 0 for a freshly shuffled deck for "balanced" counting systems.
Unbalanced counts are often started at a value which depends on the number of decks used in the game. Blackjack's house edge is usually between 0. Card counting is most rewarding near the end of a complete shoe when as few as possible cards remain. Single-deck games are therefore particularly susceptible to card counting.
As a result, casinos are more likely to insist that players do not reveal their cards to one another in single-deck games. In games with more decks of cards, casinos limit penetration by ending the shoe and reshuffling when one or more decks remain undealt.
Casinos also sometimes use a shuffling machine to reintroduce the exhausted cards every time a deck has been played. Card counting is legal and is not considered cheating as long as the counter isn't using an external device, : Sometimes a casino might ban a card counter from the property.
The use of external devices to help counting cards is illegal in all US states that license blackjack card games. Techniques other than card counting can swing the advantage of casino blackjack toward the player.
All such techniques are based on the value of the cards to the player and the casino as originally conceived by Edward O. Shuffle tracking requires excellent eyesight and powers of visual estimation but is more difficult to detect since the player's actions are largely unrelated to the composition of the cards in the shoe. Arnold Snyder's articles in Blackjack Forum magazine brought shuffle tracking to the general public. His book, The Shuffle Tracker's Cookbook, mathematically analyzed the player edge available from shuffle tracking based on the actual size of the tracked slug.
Patterson also developed and published a shuffle-tracking method for tracking favorable clumps of cards and cutting them into play and tracking unfavorable clumps of cards and cutting them out of play.
The player can also gain an advantage by identifying cards from distinctive wear markings on their backs, or by hole carding observing during the dealing process the front of a card dealt face down. These methods are generally legal although their status in particular jurisdictions may vary.
Many blackjack tables offer a side bet on various outcomes including: The side wager is typically placed in a designated area next to the box for the main wager.
A player wishing to wager on a side bet is usually required to place a wager on blackjack. Some games require that the blackjack wager should equal or exceed any side bet wager. A non-controlling player of a blackjack hand is usually permitted to place a side bet regardless of whether the controlling player does so. The house edge for side bets is generally far higher than for the blackjack game itself. Nonetheless side bets can be susceptible to card counting.
A side count, designed specifically for a particular side bet, can improve the player edge. Only a few side bets, like "Lucky Ladies", offer a sufficient win rate to justify the effort of advantage play. In team play it is common for team members to be dedicated toward counting only a sidebet using a specialized count. Blackjack can be played in tournament form. Players start with an equal numbers of chips; the goal is to finish among the top chip-holders.
Depending on the number of competitors, tournaments may be held over several rounds, with one or two players qualifying from each table after a set number of deals to meet the qualifiers from the other tables in the next round. Another tournament format, Elimination Blackjack , drops the lowest-stacked player from the table at pre-determined points in the tournament.
Good strategy for blackjack tournaments can differ from non-tournament strategy because of the added dimension of choosing the amount to be wagered.
As in poker tournaments, players pay the casino an initial entry fee to participate in a tournament, and re-buys are sometimes permitted. Some casinos, as well as general betting outlets, provide blackjack among a selection of casino-style games at electronic consoles. Video blackjack game rules are generally more favorable to the house; e.
Video and online blackjack games deal each coup from a fresh shoe, rendering card counting much less effective. Blackjack is a member of a large family of traditional card games played recreationally all around the world. Most of these games have not been adapted for casino play. Furthermore, the casino game development industry is very active in producing blackjack variants, most of which are ultimately not adopted for widespread use in casinos.
The following are the prominent twenty-one themed comparing card games which have been adapted or invented for use in casinos and have become established in the gambling industry. Twenty-one or "Siebzehn und Vier" German: An ace can only count as eleven, but two aces count as a blackjack. It is mostly played in private circles and barracks. A British variation is called "Pontoon", the name being probably a corruption of "Vingt-et-un".
Blackjack is also featured in various television shows. Here are a few shows inspired by the game. In , professional gamblers around the world were invited to nominate great blackjack players for admission into the Blackjack Hall of Fame. Seven members were inducted in , with new people inducted every year after. Members include Edward O. Thorp , author of the s book Beat the Dealer which proved that the game could be beaten with a combination of basic strategy and card counting ; Ken Uston , who popularized the concept of team play; Arnold Snyder , author and editor of the Blackjack Forum trade journal; Stanford Wong , author and popularizer of the "Wonging" technique of only playing at a positive count, and several others.
Novels have been written around blackjack and the possibility of winning games via some kind of method. An almost identical theme was shown in the Canadian film The Last Casino. In The Hangover , an American comedy, four friends try to count cards to win back enough money to secure the release of their friend from the clutches of a notorious criminal they stole from the previous night while blacked out. A central part of the plot of Rain Man is that Raymond Dustin Hoffman , an autistic savant , is able to win at blackjack by counting cards.
This movie displays different blackjack lingo and risky moves that have high rewards. From Wikipedia, the free encyclopedia. This article is about the gambling game. For the shedding-type card game sometimes called Black Jack, see Switch card game.
For other uses, see Black Jack disambiguation. Blackjack Hall of Fame. Scarne's new complete guide to gambling Fully rev. Flor del Viento Ediciones. Retrieved 21 May Religious perspectives on gambling have been mixed. Ancient Hindu poems like the Gambler's Lament and the Mahabharata testify to the popularity of gambling among ancient Indians.
However, the text Arthashastra c. The Catholic Church holds the position that there is no moral impediment to gambling, so long as it is fair, all bettors have a reasonable chance of winning, that there is no fraud involved, and the parties involved do not have actual knowledge of the outcome of the bet unless they have disclosed this knowledge.
For these social and religious reasons, most legal jurisdictions limit gambling, as advocated by Pascal. Gambling views among Protestants vary with some either discouraging or forbidding their members from participation in gambling. Methodists , in accordance with the doctrine of outward holiness , oppose gambling which they believe gambling is a sin that feeds on greed; examples include the United Methodist Church ,  the Free Methodist Church ,  the Evangelical Wesleyan Church ,  the Salvation Army ,  and the Church of the Nazarene.
The Islamic terminology for gambling is Maisir , however this also has a second definition meaning easy money. While almost any game can be played for money, and any game typically played for money can also be played just for fun, some games are generally offered in a casino setting.
Gambling games that take place outside of casinos include Bingo as played in the US and UK , dead pool , lotteries , pull-tab games and scratchcards , and Mahjong. Fixed-odds betting and Parimutuel betting frequently occur at many types of sporting events, and political elections.
In addition many bookmakers offer fixed odds on a number of non-sports related outcomes, for example the direction and extent of movement of various financial indices , the winner of television competitions such as Big Brother , and election results.
One of the most widespread forms of gambling involves betting on horse or greyhound racing. Wagering may take place through parimutuel pools, or bookmakers may take bets personally. Parimutuel wagers pay off at prices determined by support in the wagering pools, while bookmakers pay off either at the odds offered at the time of accepting the bet; or at the median odds offered by track bookmakers at the time the race started.
Betting on team sports has become an important service industry in many countries. For example, millions of people play the football pools every week in the United Kingdom. In addition to organized sports betting, both legal and illegal, there are many side-betting games played by casual groups of spectators, such as NCAA Basketball Tournament Bracket Pools, Super Bowl Squares, Fantasy Sports Leagues with monetary entry fees and winnings, and in-person spectator games like Moundball.
Based on Sports Betting, Virtual Sports are fantasy and never played sports events made by software that can be played everytime without wondering about external things like weather conditions. Arbitrage betting is a theoretically risk-free betting system in which every outcome of an event is bet upon so that a known profit will be made by the bettor upon completion of the event, regardless of the outcome.
Arbitrage betting is a combination of the ancient art of arbitrage trading and gambling, which has been made possible by the large numbers of bookmakers in the marketplace, creating occasional opportunities for arbitrage.
One can also bet with another person that a statement is true or false, or that a specified event will happen a "back bet" or will not happen a "lay bet" within a specified time. This occurs in particular when two people have opposing but strongly held views on truth or events. Not only do the parties hope to gain from the bet, they place the bet also to demonstrate their certainty about the issue.
Some means of determining the issue at stake must exist. Sometimes the amount bet remains nominal, demonstrating the outcome as one of principle rather than of financial importance.
Betting exchanges allow consumers to both back and lay at odds of their choice. Similar in some ways to a stock exchange, a bettor may want to back a horse hoping it will win or lay a horse hoping it will lose, effectively acting as bookmaker. Spread betting allows gamblers to wagering on the outcome of an event where the pay-off is based on the accuracy of the wager, rather than a simple "win or lose" outcome. For example, a wager can be based on the when a point is scored in the game in minutes and each minute away from the prediction increases or reduces the payout.
Many betting systems have been created in an attempt to "beat the house" but no system can make a mathematically unprofitable bet in terms of expected value profitable over time. Widely used systems include:. Many risk-return choices are sometimes referred to colloquially as "gambling. Investments are also usually not considered gambling, although some investments can involve significant risk. Examples of investments include stocks , bonds and real estate.
Starting a business can also be considered a form of investment. Investments are generally not considered gambling when they meet the following criteria:. Some speculative investment activities are particularly risky, but are sometimes perceived to be different from gambling:. Studies show that though many people participate in gambling as a form of recreation or even as a means to gain an income, gambling, like any behavior that involves variation in brain chemistry , can become a harmful, behavioral addiction.
Behavioral addiction can occur with all the negative consequences in a person's life minus the physical issues faced by people who compulsively engage in drug and alcohol abuse. Late or missed payments would result in visits and threats from such crime family members. The Russian writer and problem gambler Fyodor Dostoevsky portrays in his novella The Gambler the psychological implications of gambling and how gambling can affect gamblers.
He also associates gambling and the idea of " getting rich quick ", suggesting that Russians may have a particular affinity for gambling. Dostoevsky shows the effect of betting money for the chance of gaining more in 19th-century Europe.
The association between Russians and gambling has fed legends of the origins of Russian roulette. There are many symptoms and reasons for gambling. Gamblers gamble more money to try and win back money that they have lost and some gamble to relieve feelings of helplessness and anxiety.
The Advertising Standards Authority has censured several betting firms for advertisements disguised as news articles suggesting falsely a person had cleared debts and paid for medical expenses by online gambling.
The firms face possible fines. Gamblers exhibit a number of cognitive and motivational biases that distort the perceived odds of events and that influence their preferences for gambles. For example, gamblers exhibit a costly aversion to betting against their favorite team or political candidate. From Wikipedia, the free encyclopedia. For other uses, see Gamble disambiguation and Betting disambiguation.
This section possibly contains original research. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed. August Learn how and when to remove this template message. Nelson; Loeb, Robert A. Blackjack and the law 1st ed. The History of Gambling. A History of Japan. Many Japanese are naturally prone to gambling; in the old Kyoto court the vice was rife, and in the fourteenth and fifteenth centuries samurai would often stake their arms, armour, and horse trappings on a cast of the dice, even on the eve of a battle, and so have to go into action in incomplete panoplies, and sometimes with no armour at all.
In Tokugawa times the vice did not reach this extent among the samurai, but it became common in Yedo and continued to be so throughout the history of the city.