Roulette is a casino and gambling game named after the French word meaning "small wheel". In the game a croupier spins a wheel in one direction, then spins a ball in the opposite direction around a tilted circular surface running around the circumference of the wheel. The ball eventually falls on to the wheel and into one of 37 (in European Roulette) or 38 (in American Roulette) colored and numbered pockets on the wheel. This article or section does not adequately cite its references or sources. ... Caravaggio, The Cardsharps, c. ... For the 1998 Clive Owen film, see Croupier (film). ... The circumference is the distance around a closed curve. ...

Wheel layout

The main pockets are numbered from 1 to 36 alternating between red and black, but the pockets are not in numerical order around the wheel, and there are instances of consecutive numbers being the same color. There is a green pocket numbered 0, and in American Roulette there is also a second green pocket marked 00.

Betting

Players can place a variety of 'inside' bets (selecting the number of the pocket the ball will land in, or range of pockets based on their position), and 'outside' bets (including bets on various positional groupings of pockets, pocket colors, or whether it is odd or even). The payout odds for each type of bet is based on its probability. There are usually posted rules for table minimum and maximum bets, and these rules usually apply separately for all of a players 'inside' and 'outside' bets for each spin. Probability is the likelihood that something is the case or will happen. ...

History

Early roulette table, ca. 1800

The first form of roulette was devised in 17th century France. The roulette wheel is believed to be a fusion of the English wheel games Roly-Poly, Ace of Hearts, and E&O, and the Italian board games of Hoca and Biribi, and then the name Roulette from an already existing French board game of that title. The game has been played in its current form since as early as 1796 in Paris. The earliest description of the roulette game in its current form is found in a French novel "La Roulette, ou le Jour" by Jaques Lablee, which describes a roulette wheel in the Palais Royal in Paris in 1796. The book was published in 1801. An even earlier reference to a game of this name was published in regulations for French Quebec in 1758, which banned the games of "dice, hoca, faro, and roulette." (ref. Roulette Wheel Study, Ron Shelley, 1986.)^[1] Image File history File links Download high resolution version (1340x723, 342 KB) Summary Caricature of gambling at an early roulette table, ca. ... Image File history File links Download high resolution version (1340x723, 342 KB) Summary Caricature of gambling at an early roulette table, ca. ...

In 1842, fellow Frenchmen François and Louis Blanc added the "0" to the roulette wheel in order to achieve a house advantage. In the early 1800s, roulette was brought into the U.S. where, to further increase house odds, a second zero, "00", was introduced. In some forms of early American roulette wheels as shown in the 1886 Hoyle gambling books, there were numbers 1 through 28, plus a single zero, a double zero, and an American Eagle. The payout on any of the numbers including the zero's and the eagle was 27 to 1. In the 1800s, roulette spread all over both Europe and the U.S., becoming one of the most famous and most popular casino games. Some call roulette the "King of Casino Games", probably because it was associated with the glamour of the casinos in Monte Carlo. (François Blanc actually established the first casinos there.) Louis Jean Joseph Charles Blanc (October 29, 1811 - December 6, 1882), was a French politician and historian. ... For other uses, see United States (disambiguation) and US (disambiguation). ... Monte Carlo is a very wealthy section of the city-state of Monaco known for its casino, gambling, beaches, glamour, and sightings of famous people. ...

A legend tells François Blanc supposedly bargained with the devil to obtain the secrets of roulette. The legend is based on the fact that the sum of all the numbers on the roulette wheel (from 1 to 36) is 666, which is the "Number of the Beast." The Number of the Beast is mentioned in the Book of Revelation of the Christian New Testament and has long been accepted to be 666. ...

Board depiction (American Roulette)

Types of bets

Inside Bets

• Straight: a single number. The chip is placed entirely on the middle of a number square.
• Split: a bet on two adjoining numbers, either on the vertical or horizontal (as in 14-17 or 8-9). The chip is placed on the line between these numbers.
• Street: a bet on three numbers on a single horizontal line. The chip is placed on the edge of line of a number at the end of the line (either the left or the right, depending on the layout).
• Corner (or square): a bet on four numbers in a square layout (as in 11-12-14-15). The chip is placed at the horizontal and vertical intersection of the lines around the numbers.
• Sixline (or 'sixaine'): a bet on two adjoining streets, with the chip placed at the corresponding intersection, as if in between where two street bets would be placed.

Outside Bets

• Even Money Bets: a bet on 18 numbers. This is placed in the a box representing the attribute (black/red/low/high/even/odd) that you wish to bet on.
• Group Bets: a bet on the first, second, or third group of twelve numbers.
• Column: a bet on all 12 numbers on any of the three vertical lines (such as 1-4-7-10 on down to 34). The chip is placed on the space below the final number in this string.

Even money is a gambling term describing a wagering proposition in which the odds are even -- in other words, if one were to lose the bet, one stood to lose the same amount of money that the winner of the bet would win (less, of course, the vigorish or juice...

Bet odds table (American Roulette)

(in addition to the mentioned payout the bet is returned)

Note also that 0 and 00 are neither odd nor even in this game.

House edge

The house average or house edge (also called the expected value) is the amount the player loses relative to any bet made, on average. If a player bets on a single number in the American game there is a probability of 1/38 that the player wins 35 times the bet, and a 37/38 chance that the player loses their bet. The expected value is: In probability theory the expected value (or mathematical expectation) of a random variable is the sum of the probability of each possible outcome of the experiment multiplied by its payoff (value). Thus, it represents the average amount one expects as the outcome of the random trial when identical odds are...

-1*37/38 + 35*1/38 = -0.0526 (5.26% house edge)

For European roulette, a single number wins 1/37 and loses 36/37:

-1*36/37 + 35*1/37 = -0.0270 (2.70% house edge)

In roulette the house has the same edge on all other kinds of bets also, because the pay outs are always set as if the zero square(s) did not exist. The only exception are the five numbers bet where the house edge is considerably higher (7.89% on an American wheel) and the 'even money' bets in the some European games, where the house edge is halved because only half the stake is lost when a zero comes up.

The house edge should not be confused with the hold. The hold is the total amount of cash the table changes for chips, minus the chips taken away from the table. In other words, the actual "win" amount for the casino. The Casino Control Commission in Atlantic City releases a monthly report showing the win/hold amounts for each casino. The average win/hold for double zero wheels is between 21-30%, significantly more than 5.26%/2.70% of all players money because players are making repeated bets after winning and losing portions of their total money. This is known in the casino gaming industry as "churning" and is especially true of slot machine players who usually end up losing all their money.

A player with a certain total amount of money may not win or lose all their money instantly, such that the total of all bets they make will often be greater than the total of the money they actually started with. The house edge applies to each bet made not the total money, which means the player can end up losing significantly more than 5.26% of his starting money. For example it is likely that a player with $100 making $10 bets on red will be able to bet more than 10 times, because sometimes he wins. He may end up betting a total of 20 times on red. This means the expected value is 20*$10*5.26% = $10.52, over 10% of his money is now in the 'hold' despite the game having a 5.26% house advantage. A player who continually bets until they run out of money will give the house 100% hold.

Called (or call) bets

Traditional roulette wheel sectors

There are a number of series in roulette that have special names attached to them. These are placed by betting a set amount per series (or multiples of that amount). They are based on the way in which certain numbers lie next to each other on the roulette wheel. Not all casinos offer these bets, and some may offer additional bets or variations on these. Image File history File links Download high resolution version (949x949, 46 KB) La bildo estas kopiita de wikipedia:fr. ... Image File history File links Download high resolution version (949x949, 46 KB) La bildo estas kopiita de wikipedia:fr. ...

Voisins du Zero ("Neighbors of Zero")

This is a name for the numbers which lie between 22 and 25 on the wheel including 22 and 25 themselves. The series is 22,18,29,7,28,12,35,3,26,0,32,15,19,4,21,2,25 (on a single zero wheel).

9 chips or multiples thereof are bet. 2 chips are placed on the 0,2,3 street; 1 on the 4/7 split; 1 on 12/15; 1 on 18/21; 1 on 19/22; 2 on 25/26/28/29 corner; and 1 on 32/35.

Tiers ("The third")

This is the name for the numbers which lie on the opposite side of the wheel between 27 and 33 including 27 and 33 themselves. The series is 27,13,36,11,30,8,23,10,5,24,16,33 (on a single zero wheel).

6 chips or multiples thereof are bet. 1 chip is placed on each of the following splits: 5/8; 10/11; 13/16; 23/24; 27/30; 33/36.

A variant known as "Tier 5,8,10,11" has an additional chip placed straight up on 5, 8, 10 and 11; and so is a 10-piece bet.

This is also called the "Small Series" It includes the following wagers which are all Splits

5/8, 10/11, 13/16, 23/24, 27/30, 33/36

Orphelins ("Orphans")

These numbers make up the two slices of the wheel outside the Tiers and Voisins. They contain a total of eight numbers, the Orphans comprising 17,34,6 and the Orphelins being 1,20,14,31,9.

5 chips or multiples thereof are bet. 1 chip is placed straight-up on 1 and 1 chip on each of the splits: 6/9; 14/17; 17/20 and 31/34.

"xx and the Neighbors"

A number may be backed along with the 2 numbers on either side of it in a 5 piece bet. For example, "0 and the Neighbors" is a 5 piece bet with 1 piece straight-up on 3, 26, 0, 32 and 15. Neighbors bets are often put on in combinations, for example "1, 9, 14 and the neighbors" is a 15 piece bet covering 18, 22, 33, 16 with 1 piece; 9, 31, 20, 1 with 2 pieces and 14 with 3 pieces.

Any of the above bets may be combined, eg "Orphelins by 1 and Zero and the Neighbors by 1." The "...and the Neighbors." is often assumed by the Croupier.

Betting strategies and tactics

Albert Einstein is reputed to have stated, "You cannot beat a roulette table unless you steal money from it." “Einstein” redirects here. ...

Nevertheless, the numerous even-money bets in roulette have inspired many players over the years to attempt to beat the game by using one or more variations of a Martingale betting strategy, wherein the gamer doubles the bet after every loss, so that the first win would recover all previous losses, plus win a profit equal to the original bet. As the referenced article on Martingales points out, this betting strategy is fundamentally flawed in practice and the inevitable long-term consequence is a large financial loss. Another strategy is the Fibonacci system, where bets are calculated according to the Fibonacci sequence. Regardless of the specific progression, no such strategy can statistically overcome the casino's advantage. A separate article treats the topic of martingales in probability theory. ... In mathematics, the Fibonacci numbers form a sequence defined recursively by: In words: you start with 0 and 1, and then produce the next Fibonacci number by adding the two previous Fibonacci numbers. ...

While not a strategy to win money, Los Angeles Times editor Andres Martinez described an enjoyable roulette betting method in his book on Las Vegas entitled "24/7". He called it the "dopey experiment". The idea is to divide one's roulette session bankroll into 35 units. This unit is bet on a particular number for 35 consecutive spins. Thus, if the number hits in that time, the gambler wins back the original bankroll and can play subsequent spins with house money. However, there is only a (1 − (37 / 38)³⁵) * 100% = 60.68% probability of winning within 35 spins (assuming a double zero wheel with 38 pockets). This just IN !!!:paris hiltons new dog. ... For further information, see Las Vegas metropolitan area and Las Vegas Strip. ...

There is a common misconception that the green numbers are "house numbers" and that by betting on them one "gains the house edge." In fact, it is true that the house's advantage comes from the existence of the green numbers (a game without them would be statistically fair); however, they are no more or less likely to come up than any other number.

Various attempts have been made by engineers to overcome the house edge through predicting the mechanical performance of the wheel, most notably by Joseph Jagger at Monte Carlo in 1873. These schemes work by determining that the ball is more likely to fall at certain numbers. Claude Shannon, a mathematician and computer scientist best known for his contributions to information theory, built arguably the first wearable computer to do so in 1961. ^[2] Look up engineer in Wiktionary, the free dictionary. ... Joseph Hobson Jagger (1830–1892) was a British engineer, referred to as, but not an exclusive holder of the title of, the man who broke the bank at Monte Carlo. ... Monte Carlo is a very wealthy section of the city-state of Monaco known for its casino, gambling, beaches, glamour, and sightings of famous people. ... Claude Shannon Claude Elwood Shannon (April 30, 1916 – February 24, 2001), an American electrical engineer and mathematician, has been called the father of information theory,[1] and was the founder of practical digital circuit design theory. ... A bundle of optical fiber. ...

To try to prevent exploits like this, the casinos monitor the performance of their wheels, and rebalance and realign them regularly to try to keep the result of the spins as random as possible.

More recently Thomas Bass, in his book The Newtonian Casino 1991, has claimed to be able to predict wheel performance in real time. He is also the author of The Eudaemonic Pie, which describes the exploits of a group of computer hackers, who called themselves the Eudaemons, who in the late 1970s used computers in their shoes to win at roulette by predicting where the ball would fall. Thomas Bass is an American author and has an A. B. (Honors) from the University of Chicago and a Ph. ... For Eudaemons in mythology, see Daemon. ...

In the early 1990s, Gonzalo Garcia-Pelayo used a computer to model the tendencies of the roulette wheels at the Casino de Madrid in Madrid, Spain. Betting the most likely numbers, along with members of his family, he was able to win over one million dollars over a period of several years. A court ruled in his favor when the legality of his strategy was challenged by the casino.

In 2004, it was reported that a group which consisted of two Serbs and one Hungarian in London had used mobile cameraphones to predict the path of the ball, a cheating technique called sector targeting. ^[3] In December 2004 court adjudged that they didn't cheat because their special laser cameraphone and microchip weren't influencing the ball - they kept all £1.3m. ^[4] This article is about the capital of England and the United Kingdom. ... A camera phone in use Camera phones are a type of cellphone which has a camera built in. ...

Betting only on red

One conceivable strategy would be to bet on the ball landing in a red space for a certain number of spins, for example, 38.

There are 18 red spaces on a roulette table with 38 total spaces. Dividing 18 by 38 yields a probability of landing on red of 47.37%. This probability can be used in a binomial distribution and made into an approximate standard normal distribution. In probability theory and statistics, the binomial distribution is the discrete probability distribution of the number of successes in a sequence of n independent yes/no experiments, each of which yields success with probability p. ... The normal distribution, also called the Gaussian distribution, is an important family of continuous probability distributions, applicable in many fields. ...

Doing so indicates that, if one were to spin the wheel 38 times, there is a 99% probability that the ball would land on red at least 10 times. There is an 83% probability that in 38 spins, the ball will land on red at least 15 times. Out of 38 spins, there's a 50% chance that 18 will be red.

However, the break-even point is 19 spins, since the bet on red is 1:1, and the probability of 19 red spins in 38 is only 37%. This indicates the difficulty of winning by only betting on red.

The results occur because, as indicated by the 18 divided by 38 equals 47.37% figure, the ball will land on red less than half the time. This percentage applied in the binomial and standard normal distributions creates the vast divide in probability from 18 red spins to 19 red spins out of 38 spins. It is very unlikely for anyone to spin much more than 18 red spins out of 38 spins.

Betting multiple times

This type of bet is a combination of the red bet and the martingale system. The difference is that this bet also includes the odd. This strategy starts off with a bet of 1 on each the red and the odd (or you can do the black and even). Each bet is treated separately. When one bet loses, it is doubled. When one bet wins, it gets set it back to 1. The reason that this technique keeps the player in the game so long is that there is almost a 25% chance of winning both the red and the odd and there is almost a 50% chance of breaking even (win one bet and lose the other). Of course, in order for this method to last, the player would need an unlimited source of money, and a casino with another one to boot. In reality, this method backfires when the player can't bet any longer and loses. The loss that this causes is possibly hundreds of times bigger than a loss made when starting. Also, in the long run, because the house still has an edge, the player will lose money just like with all other "unbeatable" casino games. It has been suggested that this article or section be merged with Martingale (probability theory). ... Caravaggio, The Cardsharps, c. ...

Using the dozen bet

There are two versions to this system, single dozen bets and double dozen bets. In the single dozen bet version, the player uses a progressively incrementing stake list starting from the casino table minimum, to the table maximum. The aim here is to use a single dozen bet to win before the stake list ends. Many techniques are employed such as: betting on the same dozen to appear after two consecutive appearances, betting on the dozen that has appeared most in the last 15, 9, or 5 spins, betting on the dozen that, after a long absence of 7 or more spins, appears for the first time. The double dozen bet version uses two dozen bets and half the stake list size of the single dozen bet version.

1st and 3rd column strategy

One bet of 2 pieces on the 1st column and one bet of 2 pieces on the 3rd column covers most of the red numbers on the table. One bet of 2 pieces on the black will provide insurance for occurrence of black. This betting system covers all numbers except for the 4 red numbers in the middle column and the zero. If the result is a red number in either the 1st or 3rd column, the player only breaks even. If the result is red in the middle column the player loses 6 pieces. If the result is black and in the middle column, the player loses 2 pieces. If the result is a black in the 1st or 3rd column, the player wins 6 pieces.

Famous bets

• In 2004, Ashley Revell of London sold all of his possessions, clothing included, and brought US$135,300 to the Plaza Hotel in Las Vegas and put it all on "Red" at the roulette table in a double-or-nothing bet. The ball landed on "Red 7" and Revell walked away with his net-worth doubled to $270,600.

• In the 1942 film Casablanca, Rick's Café Americain has a trick roulette wheel. The croupier can cause it to land on 22 at will. Rick (Humphrey Bogart) urges a Bulgarian refugee with whose case he becomes sympathetic to put his last three chips on 22 and motions to the croupier to let him win. After the man's number dramatically comes up, Rick tells him to let it all ride on 22 and lets him win again. Although the details are not mentioned in the film (the croupier only notes that they are "a couple of thousand" down), it appears that Rick has given the man 3885 ((3*36*36)-3) francs.

• In the music video for "Palace & Main" by Kent, guitarist Harri Mänty goes to Las Vegas and bets the entire video budget on black. He wins, and the profits were donated to charity.

• In the third part of the 1998 film Run, Lola, Run, Lola uses all her money to buy a 100-mark chip. (She is actually just short of 100 marks, but gains the sympathy of a casino employee who gives her the chip for what money she has.) She bets her single chip on 20 and wins. She lets her winnings ride on 20 and wins again, making her total winnings 129,600 marks (29,600 more than her smuggler boyfriend owed his boss, Ronnie).

• In the South Park episode "Red Man's Greed", the town, facing destruction at the hands of Native Americans, bets $10,000 to raise money to save the town. They win, but let it ride, and lose all of it.

Ashley Revell (born 1972) is a London resident famous for selling all his possessions (including all his clothes) and gambling US$135,300 on a single spin of a roulette wheel in Las Vegas, Nevada. ... This article is about the capital of England and the United Kingdom. ... The United States dollar is the official currency of the United States. ... For further information, see Las Vegas metropolitan area and Las Vegas Strip. ... Casablanca is an Oscar-winning 1942 romance film set during World War II in the Vichy-controlled Moroccan city of Casablanca. ... Humphrey DeForest Bogart (December 25, 1899 – January 14, 1957) was an American actor. ... Palace & Main is a song by Swedish rock band kent, written by Joakim Berg and Martin Sköld. ... Kent is a Swedish rock band founded in Eskilstuna/Torshälla in 1990, with the name Coca-Cola Kids, later Jones & Giftet (Jones & the Poison), and Havsänglar (Angel sharks, literally Sea angels). ... For further information, see Las Vegas metropolitan area and Las Vegas Strip. ... Run Lola Run (original German title Lola rennt, lit. ... This article is about the TV series. ... Red Mans Greed is episode 707 of the Comedy Central series South Park. ... Native Americans in the United States are the indigenous peoples from the regions of North America now encompassed by the continental United States, including parts of Alaska. ...

See also

• Russian roulette
• Straperlo
• The Red Snake Roulette Bet
• Live Roulette TV
• Bauernroulette

Russian roulette is a lethal form of gambling in which participants place a single round in a chamber of a revolver and, spinning the cylinder such that the location of the round is unknown, take turns putting the weapon to their temples (heads) and pulling the trigger until the weapon... Straperlo or stra-perlo is a Spanish term referring to a fraudulent business activity, usually involving abusive prices. ... The Red Snake Roulette bet is an uncommon, but legal, bet played mainly by high-rollers in the gambling world. ... Live Roulette TV is an interactive gaming show screened daily on Sky digital channel 847 from 6pm to 2am, on Information TV 2, Sky Digital channel 182, from 7pm to 10pm, and Information TV 1, Sky Digital channel 181 from 10pm to 2am daily. ... Bauernroulette is a game in which a whipping top is spun in the middle of a wooden circular playing surface that contains 6 wooden balls. ...

References

1. ^ Roulette Hero
2. ^ http://c2000.cc.gatech.edu/classes/cs8113c_99_spring/readings/thorp.pdf
3. ^ http://news.bbc.co.uk/1/hi/uk/4071289.stm
4. ^ http://www.gamblinggates.com/News/07122004/Ritz_Roulette_Scam24041.html

Roulette Wheel Study. Ron Shelley 1988 revised edition 2001. (Gamblers Bookstore, Las Vegas, NV)

External links

• Encyclopaedia Britannica, Roulette - full-access article
• Roulette odds and probabilities