A handful of men throughout history have managed to perfect a theory called “wheel bias,” where they record results from roulette wheels to see what numbers the wheel favors. Finding a biased roulette wheel sounds like a great advantage strategy in theory. Biased wheels were replaced with ones that ran far more smoothly. Casino staff tend not to focus on this topic and would do anything to convince players that a biased wheel is. The 1. The observer needs to watch a wheel for at least 500 spins in order to locate a biased section, which requires approximately 8-12 hours to accomplish. Find out how to make a roulette wheel bias work in your favour at US casinos. Is it a biased wheel? Although we can never be absolutely certain, we can. The most obvious is the alternation of red and black pockets because they do not represent any specific sector of the wheel. The free winning 'Super roulette strategy, systems'. My wife the Beautiful AP and I played one biased wheel in the early 1990’s at the Rio casino in Las Vegas. At first glance, it may seem like fewer numbers increase a player’s chances. 89%. In the days of old, biased roulette wheels were common at casinos, since scant attention was paid to worn frets, or imperfectly positioned. Wheel Randomness. It’s a very different thing to “hot numbers”, which occur on either real wheels, or random number generator (RNG) roulette. It is not a problem if a wheel has various. Another problem with clocking roulette wheels to find a bias is that many roulette wheels aren’t biased at all. A croupier spins the wheel and throws an ivory ball. No elaborate tracking and recording was needed. o, very small angles, and spun the wheel 176 times. 112 reviews. The wheel features 13 numbers, from 1-12 and 0. Similarly, an experiment which waits for $8$ heads in a row should reveal a bias for the $9$-th toss. This term refers to the process of watching wheels to look for biased results. However, you can use a strategy called wheel bias. So, it’s clear that biased Roulette wheels are still a reality, since moreover, logically no one wheel is truly unbiased i. 7% advantage over the player. Wheel bias can be the result of born or wear defects. Save. The helpers took note of the results from the wheels, which allowed Jagger to find that one particular wheel was biased to particular set of nine. But in fact, roulette is by far the most vulnerable game for casinos. Portable system and method for identifying roulette wheel biases WO2019071236A2 (en. Now if a casino changes the rotor. SO if you. 2- A way of analysing the data to identify any real bias in the spins. Wheel bias is a thing of the past. Searching for wheels with loose frets may seem like searching for a pearl in an ocean full of oysters, but when you find a wheel with a bias you may have plenty of. And a professional wheel bias player can use techniques that find bias before the casino knows about it. Is this roulette wheel biased. A roulette player could play the top 10-12 pairings of each roulette number. It comes up 2,113 times vs expected 1,962. Biased Wheel. Check that metal ball rolling on the roulette wheel! Yeah, we’ve spent buckets of sweat and blood, creating this simulator, but it's. e. Like Jagger, Gonzalo Garcia-Pelayo also successfully located a particular roulette wheel with a bit of deformity and was biased on specific numbers. Bowl holds the revolving part of the wheel. American roulette is played with a double zero roulette wheel. Upon request, he was granted a $2 million freeze-out at New Jersey’s Atlantic Club Casino. For example, they may consider “wheel bias”. The frequencies of the jumps are homogeneous; more accented so than the frequencies of. Yes, I will entertain arguments that you can theoretically beat roulette by measuring the rotation of the ball and the speed of the wheel. 6. They wanted to make sure. Playing this roulette wheel-half system with flat betting would have yielded a profit in excess of a quarter million Euros. The casino’s software is incapable of observations that enable earlier detection of bias. Murphy's wheel had a chi-square value of 94. Roulette Surrender Rule. If the colored glue on one of the grooves wear out then that may affect where the ball lands. The observer needs to watch a wheel for at least 500 spins in order to locate a biased section, which requires approximately 8-12 hours to accomplish. One of the first people known to have exposed a biased roulette wheel was Yorkshireman Joseph Jagger, way back in around 1880. Any time you like you can play the game for any time long, just click your bookmark! Our Roulette Simulator is free and immensely realistic. 000032%. The latter enables gamblers to more-accurately predict where the ball lands and bet accordingly. The truth is that these days spotting wheel bias is almost impossible. As covered before, you can’t use electronics like the Eudaemons or Small/Tse to legally beat roulette. He asked for a half-million in two checks and the rest in cash. This is not to be confused with the Three Quadrant Strategy, by the way, which is more of a hedging strategy. For example, a wheel bias may be attributed to the rotor, which is the spinning part of the wheel. Roulette bias is when particular numbers win more frequently than others, due to physical defects of the wheel. On a roulette wheel with no bias, each spin is independent of one another. This is not a variable at all, unless you are specifically checking for roulette wheel bias (in which case the color that had spun most is more likely to be biased). However, finding a biased table is impossible. The reason to do so is that any bias, when discovered by a player, may be used to his/her advantage. Find out how to make a roulette wheel bias work in your favour at US casinos. 26%. Roulette tables (actually, every table game) is now all hooked up to computers that keep track of wins and losses in near real time. A wheel bias is a situation where a defect prevents a wheel from being fully random, and therefore certain numbers appear more. 35% (for 50/50 bets only) otherwise 2. Bias Analysis (exploiting wheel imperfections) Roulette wheels have slight imperfections that make some numbers win more than others. Roulette wheel bias is due to physical imperfections, which cause certain numbers to have more success than other numbers. American tables come with 38 numbered-pockets, and European ones. The same three adjacent numbers kept hitting with unusual. Nevertheless, let’s explore this further. • In the analysis, the roulette wheel was divided into 8 equal sectors and the ball was always released from the same sector. 05)” shows the effect of P = 0. Professionals looking to play online roulette will focus on casinos that offer live dealer wheels. o. The modern roulette wheel is made to a very high standard and the chances of it having a bias are lower than ever, and the fact is that if there is a bias, the casino would almost certainly know about it long before you would. It is the Physics science and not statistics that defies the roulette betting system based on sections. The chi square is a little low, but the large number of numbers close to, or below two standard deviations between the numbers 27 clockwise to 14. Also, roulette is an extremely popular game, thus there is no shortage of data and the game is familiar to those playing it. We all know that roulette is a game of chance. Although there are numerous others, such as visual ballistics. Any method that works involves inside roulette bets, including methods to predict roulette numbers visually, roulette wheel bias, and the best winning roulette system explained on my home page. So, it’s clear that biased Roulette wheels are still a reality, since moreover, logically no one wheel is truly unbiased i. ”. Ronny_4son. The Roulette wheel bias can be uncovered only by close observance and it takes hundreds or even thousands of spins. 2. The roulette wheel layout and the roulette table layout are a deliberate randomisation. Progressive in betting means that you keep increasing your stake after a milestone. What is biased wheel? When it comes to the roulette tables production, all the manufacturers try to be as accurate as possible. So, let's look at Caro's Roulette System #1. 057%. “Spread bias (0. value. Biased numbers. Suppose we have “clocked” a roulette wheel for n coups, and the most frequent number has occurred a proportion 1/25 of the time. Back in the early 1990s, a roulette player named Gonzalo Garcia Pelayo had a very brilliant idea about roulette. 0014%. so they do not affect roulette wheel bias or methods that predict roulette numbers visually. Roulette Wheel Analysis allows operators to assign wheels to tables and collect data in the background, which allows them to generate concise and detailed. This type favors the players, so to say, as modern software fails to catch it. The bias was overwhelming, as shown in the next. This kind of defect is called a roulette wheel bias, and while my example may seem a little bit ridiculous, it is only to illustrate a point. If we have to use a 300-spin length sampling, we can observe the sum of “positives” (times above the expected considering 36-spin cycles) for numbers is around +37. These are the result of an imperfect wheel or better known as ‘biased wheel’. Roulette Wheel. ” -- Carl Sagan. 6- Embrace the Gambler’s FallacyWheel bias occurs whenever roulette outcomes deviate from long term expectations. American Roulette is a game that developed in the United States, as the name suggests, with a particular twist to its sequence of numbers and layout – the addition of double zero. All Saturn™ Wheels incorporate three discreet in-built reading sensors discreetly embedded in the rim for a range of wheel diagnostics. His Serbian partner did even better, making £684,000 from his initial £60,000. Despite the expertise and high quality control of roulette manufacturers, a wheel can never be 100% perfect; there will always. 5. SUS is a development of fitness proportionate selection (FPS). Some players have famously earned millions of dollars using wheel bias. perfectly balanced and/or without any flaws. Wear and tear determine the wheel to favour specific sectors;. 1. This strategy aims at covering up all the previous losses and staying ahead by at least a small margin. How do you know the past 100,000 spins didn’t include an opposite trend like 60,000 blacks and 40,000 reds? Wheel bias. Section bias is defined by a group of numbers favored by the roulette wheel. You can read about Gonzalo Garcia Pelayo, one of the most successful players to exploit wheel bias here , but essentially you would see the ball favouring a certain. These biases usually occur by accident, but this does not mean that roulette wheels cannot be. When playing roulette online there is no chance of a biased wheel since the wheel is digital and. But rarely is this bias alone strong enough to overcome the house edge. . Wheel bias relies on a roulette wheel experiencing enough wear and tear to the point of favoring certain numbers. For example, a barely perceptible tilt might increase the odds of the ball. to 1. But only one method was really successful, spotting a biased roulette wheel. Roulette Wheel Bias Analysis Techniques. Biased Roulette Wheels. The wheel or rotor is the most important variable in roulette. The wheel is obviously biased towards odd prime numbers between 3 and 17 that do not include the number of players on the field for a football or basketball team. Wheel imperfections is one matter. The Italian newspaper Il Giorno called him “The world’s most successful roulette player” — a reedy academic who “. It’s also known as the “Monte Carlo Fallacy,” named after a casino in Monaco where it was. Fibonacci Rule. A description of a wheel that I think may have been constructed in that way is to be found in an article "Roulette Bias Exposed" by Jeff Murphy Link. It is the overwhelming case of unbiased roulette wheels. 7%. Wheel Clocking — 1. One such lucrative opportunity has to do with wheel bias: Advantage players are always on the lookout for faltering wheels. Break even a point at which you neither win nor lose. Accordingly, the arrangement and the sequence of the numbers on the American wheel are different. If the roulette wheel is not correctly levelled or if a player leans on the roulette table with such force that the roulette wheel is no longer level, then part of the path of the ball around the rim may be sufficiently upwardly inclined to cause further slowing of the ball so that the ball. Mr Jaggers, with a team of 6 clerks, clocked all the roulette wheels at the Monte Carlos. A bet on an individual number pays 35:1, but you have only a 1 in 38 chance of success. A popular roulette betting strategy is the quadrant strategy, which involves betting on fixed sections of the wheel and green baize. Data representing, for a number of games, the region of the rim from which the ball fell. This wheel has 38 numbered slots in total, containing the numbers from 1 to 36 (red or black color) and the two green numbers 0 and 00. The roulette wheel (1) comprises a ball track (11A), upon which a roulette ball (14) is brought into rotation around the roulette wheel (1), and a sloping lower ball track (11B). The ONLY way repeaters can work are if the mechanism that determines winning numbers makes some numbers win more than others (such as wheel bias or a flawed RNG). Although a statistician will tell you that each spin of a roulette wheel is totally unrelated to the next, this is technically untrue. 26% on all bets, except for the five number bet which has a house edge of 7. 89%. Description: 207. In their bias wheel attack Mr Jaggers managed to walk away with $325,000 - a huge sum for 1873!! (Read more : Joseph. Find out how to make a roulette wheel bias work in your favour at US casinos. +4 = 10. Find out how to make a roulette wheel bias work in your favour at US casinos. While it may seem like a surefire way to win at roulette, the reality is that most modern roulette wheels are well-maintained and balanced, making it. Biased Wheels and Wheelhead Speed. If a roulette wheel is off by just a little bit, a gambler could theoretically place bets on the favored numbers and gains a 5% edge (or more) on the house. 2% bias falls within three standard deviations. The first thing I noticed from their sales material is they. A biased wheel has a tendency of sticking to certain numbers, which allows players (who notice the bias) to react and secure a profit. Load the Wheel: On the net, visit our site Wheel-decide. The advantage of this technique is that it gives no bias. The vast majority of gamblers back then didnt realize that roulette games could show bias. Unlike Wells, he didn’t generate the same attention at the time. There is a slight house bias, provided that there is a constant, ever play roulette on a desk with two zeros - when the bias is significantly larger. Bias can occur for all manner of reasons. It comes up 2,113 times vs expected 1,962. Biased Roulette Wheels. Here are three roulette legends who made millions thanks to this advantage play technique: Joseph Jagger – This British engineer was the first wheel bias master. Find out how to make a roulette wheel bias work in your favour at US casinos. 1 of the project proposal submitted by NWML to GBGB on the 24 February 2005. Roulette Numbers and Ball Drop. 35. There´s also the Monte Carlo roulette scam of 2014-2015 in which 3 men from the UK fleeced the Casino de Monte Carlo out of €3. When Roulette Cheating isn’t Cheating. Wear and tear to the drum of the roulette wheel may not happen uniformly. Roulette wheel numbers may be difficult to get accustomed to for some players, but this improves your overall chance of having a. It’s not as though every. Blacks $100 black colored chips. 6% of total spins. Biased Roulette Wheels. This is a method based on the game’s physics that works best with the detectors described above. Because the gamblers thought a red was long overdue, they started betting against black. Even. Roulette wheel bias is perhaps the oldest method, but there is still no such thing as a no lose roulette system. Any time you like you can play the game for any time long, just click your bookmark! Our Roulette Simulator is free and immensely realistic. Biased wheel. Wheel bias happens when roulette wheels begin breaking down due to wear and tear. You can also just search the internet for our name generator wheel. In 1986, they started recording roulette results in Atlantic City. One notoriously poor RNG is the one in Microsoft Excel. We discuss the proper analysis. This is a method based on the game’s physics that works best with the detectors described above. Sometimes bias will only occur with specific rotor and. Press the "Spin" button, and the wheel randomly selects a choice for you. This is caused by wheel defects. If you bet 1 dollar on red, you win 1 dollar if the ball stops in a red slot, and otherwise you lose a dollar. Some may favor certain numbers (a. On many wheels, they look identical to that of other wheels. Inside Bet – This is a bet based on the inside area of the roulette table where the. Roulette Bonus. Countless reasons could be behind a roulette wheel being considered biased. Stochastic universal sampling (SUS) provides zero bias and minimum spread . Top 3 types of bias that influence roulette oddsThis wheel is high-tech in every way. Top 3 types of bias that influence roulette oddsBnitty, Yes your wheel is likely a WEAK biased one. 70%. If we are going to talk about roulette wheel bias, we have to talk about a guy called Gonzalo Garcia-Pelayo. Desperate for money after the. The exception is if the wheel has a physical anomaly, causing some numbers to win more than others. Some wheels favor certain pockets when they suffer wear and tear. 0. Naturally, we assume mathematically that the wheel is fair, so that the random variable (X) that gives the slot number of the ball is. 5% on investment means you need to win 56. These techniques are partially explained on my roulette wheel bias page. Basically you pay him $10,000, then test his system over the set spins, and this is his guarantee that his system. Early roulette wheels were prone to what's known as "wheel bias" in that they would wear more on one side than the other. But one can find biased wheels by recording results and analyzing the data. Wheel Strategies — Tactics used to take advantage of flaws on the roulette wheel in order to gain an edge. Basically, if we ignore friction, drag, and tilt, the wheel itself simply rotates in one direction, and the ball rolls around the rim in the other direction. Like Jagger, Gonzalo Garcia-Pelayo also successfully located a particular roulette wheel with a bit of deformity and was biased on specific numbers. Roulette wheel bias still exists today, but is very rare. Modern casinos don’t spend money on shabby gambling equipment. However, this situation began changing when British casinos commissioned TCS John. to 1. In facts it’s from a combination of things. The wheel has 37 divisions — from 1 to 36 and a green single zero pocket). A description of a wheel that I think may have been constructed in that way is to be found in an article "Roulette Bias Exposed" by Jeff Murphy Link. Finding a bias is like finding the goose that lays the golden eggs. The participants were colorfully described as a Nazi sailor and various “fruit hucksters, waiters and farmers”. Neither does it use the predictability of the ball spin of the dealer, often called dealer’s signature. On the roulette wheel, the numbers for even money bets are staggered in an alternating fashion making it less likely to isolate a winning color or value. Some may have more imperfections than others. For a gaming venue seeking to protect revenue from roulette wheel faults, the key figure of merit isn’t life expectancy or reliability, but numerical bias. Wheel bias is a thing of the past. Find out how to make a roulette wheel bias work in your favour at US casinos. Spotting a bias is somehow considered a skill and you can keep all your winnings. Walters, a native of Munfordville, Kentucky, and a betting associate noticed a wheel bias at the Atlantic Club Casino Hotel in Atlantic City, New Jersey—now abandoned—and then proceeded. Threads: 35; Posts: 2101; December 9th, 2017 at 8:03:14 PM permalink. Spot the Difference Physical wheels are manufactured, and no wheel will be 100% perfect. But definitely more have lost money off what they Thought were biased roulette wheels. 05)” shows the effect of P = 0. This is because people find it enjoyable and exciting. And one of the measures casinos take to prevent it is by regularly changing rotors between wheels. Because of this, and because the gambler’s fallacy occurs as a result of belief in local representativeness, this bias is closely associated with the representativeness heuristic,. While in fact there’s no such thing as a perfectly random wheel, and every wheel is biased to a degree, very rarely is a bias alone strong enough to enable long-term winnings. numbers on a biased wheel, with his formula his bets changed. Murphy says the industry standard for a biased wheel is 55 or over. Roulette wheel bias is an issue that affects brick and mortar. So for many roulette players the biased-wheel hunt became almost an obsession. However, proper wheel bias techniques involve much more than looking at the past few hundred spins. Biased Wheels. To apply this strategy for the game of bingo, you’d have to be able to select your numbers. Most bias is caused by very tiny imperfections and the bias created is. This is not to be confused with the Three Quadrant Strategy, by the way, which is more. 5%. Advantage gambling methods in roulette can only be approached one way legitimately, and that is through a mathematically proven method that aims to exploit. If a particular number wins over 2. 26% (if you are interested in the mathematics of roulette, the video at the end will show you how these odds are calculated). However, various factors may cause a bias to arise. Notice wheel bias. The drop zone detection sensor in some roulette wheels is a technology that is used to detect non-random results and drop zone bias. We would like to show you a description here but the site won’t allow us. French roulette is considered advantageous for real money players. On a live roulette wheel, at least, any of the tiny parts mentioned above can break down very easily because the average casino tends to spin its wheels thousands of times. “Extraordinary claims require extraordinary evidence. However, the above simulator has the following key differences: 1. It is not to say that you can’t beat roulette without statistics. Wheel bias involves recording. He asked for a half-million in two checks and the rest in cash. Taking advantage of biased wheels Unbalanced wheel. Inside Bet – This is a bet based on the inside area of the roulette table where the. Roulette is a simple game of chance. By the way the "quadrant" of the ten numbers 17-5-22-34-15-3-24-36-13-1 is even more biased than number 22. Roulette Wheel Bias Theory vs Practice. These numbers were considered “biased” as was the wheel. Profit/loss for 50 million spins on different roulette wheel configurations, using the Leigh system. He analyzed the data after they returned and found a biased wheel. One such “inefficiency” is the bias the roulette wheel can show favoring specific numbers. The following material is the bias analysis. Keyser. We would like to show you a description here but the site won’t allow us. The fallacy assumes that random events are “due” to balance out over time. In a roulette wheel selection, the circular wheel is divided as described before. A social network where professional roulette players discuss roulette strategies and betting systems Roulette Calculators is a roulette social network that hosts roulette calculators and roulette strategies. What characterizes this type of bias is the prediction of its evolution, which serves for adjusting bets. The first thing to say, is that the roulette wheel is designed to generate outcomes of pure chance. Finding single favored pockets can be more lucrative, because you’re narrowing down where the bias(es) occur. There are some methods that rely on a combination of outside and inside bets, although these reduce the player’s edge with the benefit of making the system more covert to apply. The last type is a dynamic bias and it usually works for just a few hundred spins. But throughout history, players like Billy Walters, Joseph Jagger, and Gonzalo Garcia Pelayo have made huge. By applying these techniques to a standard casino-grade European roulette wheel, we demonstrate an expected return of at least 18%, well above the -2. Data representing, for a number of games, the region of the rim from which the ball fell. However, it’s the other way around. Wheel bias is the best way to win $1 million in roulette from an advantage play standpoint. The wheel is divided into 38 even sectors, numbered 1–36, plus 0 and 00 (in Europe, the wheel is divided into 37 sections, 1–36 plus 0). Similarly, an experiment which waits for $8$ heads in a row should reveal a bias for the $9$-th toss. 20. Wear and tear to the drum of the roulette wheel may not happen uniformly. These may be the defects of pockets - some of them being bigger than the rest, or because of the deviations in the form of slots. The “no bias” results are the losses from a balanced wheel. The roulette wheel must be carefully calibrated and regularly inspected to ensure that the outcome of each spin is random and unpredictable. Any roulette system that works takes into account the real physical variables. Roulette Systems from Many Gambling Authors, Developers Presenting the easiest and most straightforward free roulette system based on wheel bias By Ion Saliu, Founder of Roulette Mathematics First captured by the WayBack Machine (web. With common software, a wheel can have a green, orange or red rating. This is called a “biased wheel”, and all wheels are biased to some degree. I am wondering if this suggests that there could be some type of bias on this roulette wheel that is causing one number to not appear as often as expected, or if this would be considered a normal result. That brought the group’s take, including from. The roulette wheel is designed to be mechanically "perfect", the purpose of which is to generate random numbers evenly, fairly, and without bias. Apr 16, 2023, 10:09 AM. Fitness proportionate selection, also known as roulette wheel selection, is a genetic operator used in genetic algorithms for selecting potentially useful solutions for recombination. English engineer Joseph Jagger used his profession to figure out that not all roulette wheels are completely accurate. So essentially to use this strategy in bingo roulette, you would need the ability to choose your numbers. Does the Roulette System Work – The Biased Wheel Concept. Section bias is defined by a group of numbers favored by the roulette wheel. The region of the wheel which comes in front of the fixed point is chosen as the parent. . • In the analysis, the roulette wheel was divided into 8 equal sectors and the ball was always released from the same sector. The segment size and selection probability remain the same throughout the selection phase . 5. They fall way, way outside the normal probability rule! I did some calculations for one month, that January of 2006. 70% of the time, then it means there is a wheel bias. Chi-square for an unbiased wheel ranges from 20 to 40. What Is a Biased Roulette Wheel? Roulette wheels are physical objects, and thus imperfect. 70%. Nevertheless, let’s explore this further. An infinitely harder bias to determine,. 8 million in the process. For example, one pocket may be slightly larger than others because of the flaw in the pocket separators. • The NWML experimenters tilted a wheel from 0. The design and make may also result in very small defects. Find out how to make a roulette wheel bias work in your favour at US casinos. Biased Roulette Wheels. Gamblers Have Won Millions through Roulette Wheel Bias. A roulette wheel ( 1 ) has a ball detector ( 9 a, 9 b, 9 c ) to detect the ball as the ball travels round the rim ( 3 ) of the roulette wheel and a drop determiner ( 21 ) to determine, for each of a number of games of roulette, the region of the rim from which the ball fell from the rim. 4. This is known as wheel bias. Dealer Bias: Sometimes, dealers unintentionally develop patterns in their spinning techniques. The casinos are constantly analysing their wheels to look for signs of biases and will remove the ones that have them. For example, they may consider “wheel bias”. 2. e. So even if you win, you are still paid an unfair amount. If you gather enough data to show. European roulette wheels had 37 slots instead of the 38 of the USA, so the house edge was 2. A single number coming up from 38 numbers on the board, including, and 1 – 36, has a probability of 1/38, or 2. When a roulette wheel is biased it has numbers that are more likely to pop-up than others due to a fault of some sorts. In fitness proportionate selection, as in all selection methods, the fitness function assigns a fitness to possible solutions or. For example, roulette wheels have a clear glue that covers each of the number pockets on a roulette wheel, now if that clear glue wears off the grooves become damaged and that. Hot numbers will occur regardless, and are a normal part of probability and statistics. It’s also known as the “Monte Carlo Fallacy,” named after a casino in Monaco where it was. The following online gambling websites have live dealer blackjack, live poker and live roulette (roulette with a real, live croupier, and also live electronic roulette), therefore you can experiment with wheel bias and the other method in these online casinos (in fact, it’s easier, because you don’t have to act like a regular player, you can even take. One of the biggest roulette frauds of recent times has to be the Primrose Hill gang from London, who are. It’s tough to notice any inherent roulette bias. Casino Test of Super Roulette Strategy, Halves System: Trump Taj Mahal. The most famous case is probably that of Joseph Jaggers, a British man who was able to win the. If you couldn’t use your numbers, then you would need to purchase more tickets until the biased numbers were in your list of numbers. Any roulette wheel that produces outcomes that are not purely governed by chance and the results are manipulated in any way is referred to as a “biased whee l. Mr Jaggers, with a team of 6 clerks, clocked all the roulette wheels at the Monte Carlos. One such “inefficiency” is the bias the roulette wheel can show favoring specific numbers. It’s also possible that some pockets are imperceptibly bigger than others. When a roulette wheel is perfectly symmetrical and balanced, it is guaranteed to deliver random results. A German doctor used the wheel bias method to cheat European roulette tables in the 1970s After months of studying wheel spins, Richard Jarecki profited $1. Profit/loss for 50 million spins on different roulette wheel configurations, using the Leigh system. Wheel modification, sometimes known as wheel gaffing, involves modifying the roulette wheel in a way that makes spins more predictable. The total profit at the end is roughly 50k for 400k investment or 12. Don’t jump around and bet on a different dozen or it will mess up the system. So I would imagine at least the larger establishments with service contracts probably have their biased wheels. These are digits on the roulette wheel where the ball tends to land frequently.