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Gonzalo Garcia-Pelayo: Who Says You Can Not Beat Roulette?

Gonzalo Garcia-Pelayo at Roulette

In the summer of 2004, many Spanish newspapers published articles on the final decision of the trial against Gonzalo Garcia-Pelayo, the mathematics and recording director. Owners of Casino de Madrid accused him of fraud and the use of prohibited methods which helped him to long win at roulette.

However, before we explain the result of the process, which lasted over ten years, we will tell you the story of Garcia-Pelayo.

Who Is Gonzalo Garcia Pelayo?

It began in the early 1990s, when Gonzalo, who had failed in his main job, decided to devote himself to his true passion: roulette. He did not invent the wheel, but instead chose to use the technique developed by Joseph Jagger, which had been successfully tested in the nineteenth century.

Gonzalo watched the roulette in the Madrid casino and concluded that its design is far from perfect. Accordingly, they have deviations, which means that the ball lands into some pockets much more often than into others.

To prove his theory, he began recording the winning numbers with the help of his five children. He did not play himself, just watched others (you can only imagine what casino employees thought of it).

Garcia- Pelayo processed the results on the computer and saw that the ball stopped in certain pockets much more often than in others. According to his calculations, he could have about a fifteen percent advantage over the casino by making the "right" bet.

The rest was a matter of technique. Gonzalo went to the Casino de Madrid, but with money. His first game session yielded a substantial win. He continued to visit the casino almost every day and managed to win a decent amount before the administration took some active measures.

But by that time, Garcia had already changed casinos, acting on the same principle:

  1. a thorough analysis of roulette wheels,
  2. recording numbers,
  3. computer calculations,
  4. playing for real money.

Gonzalo Garcia Pelayo in Vegas

After a while, he was known in all Spanish casinos. Needless to say, he was not always happy. Gonzalo went to conquer Las Vegas, where he also excelled. When he started playing there and they refused to serve him,

Garcia decided to "retire". He says that the total gain in various casinos exceeded half a million dollars.

Lawsuit against Gonzalo Garcia Pelayo

Now, back to the protracted process against Gonzalo. The Spanish Supreme Court finally closed it, declaring Gonzalo Garcia-Pelayo innocent. The judge recommended that casinos carefully monitor their equipment or develop new and better tires.

The casinos did it. Currently, the best roulette (e.g., Huxley) operates without any abnormality. It's structure (wide and low ledges, small cells, elaborate obstacles for the ball, and so on) virtually eliminates the possibility of using visual ballistics and other methods used by advanced roulette players.


And Gonzalo Garcia-Pelayo wrote a book about his achievements, which is very popular among those who want to win at roulette. A documentary was based on it. You can find the interview with this tricky Spaniard on YouTube. By the way, the court decided that the Casino de Madrid has no right to deny Gonzalo in service, but as we know, he is no longer eager to storm the roulette.

Frequently asked Questions

✅ What is Gonzalo Garcia-Pelayo known for?

Gonzalo Garcia-Pelayo is widely recognized as a Spanish music producer, film director, and, most famously, a professional gambler. He gained international notoriety in the early 1990s for developing a method to win at roulette by exploiting subtle imperfections in the roulette wheels themselves. His story has inspired documentaries, books, and even a film. Beyond his gambling success, he has had a varied career, including being a radio host, television presenter, and even a matador manager at one point.

💲 How did Gonzalo Garcia-Pelayo manage to win at roulette?

Gonzalo Garcia-Pelayo's strategy involved meticulously observing and recording thousands of spins on various roulette wheels. He and his family gathered extensive data on the outcomes of spins, and then Garcia-Pelayo used a computer program to analyze this data. He discovered that, due to slight manufacturing defects or wear and tear, specific numbers on some roulette wheels appeared more frequently than others, creating a measurable bias. By identifying these biased wheels and the numbers they favored, he and his team could place their bets strategically, giving them an advantage over the casino. This was not considered cheating as it relied on detecting mechanical flaws rather than manipulating the game.

👨‍⚖️ Was Gonzalo Garcia-Pelayo's method legal?

Gonzalo Garcia-Pelayo's method was deemed legal. Casinos attempted to sue him and his family, arguing that their actions constituted cheating. However, courts, including Spain's Supreme Court, ruled in his favor, stating that he used "ingenuity and computer techniques" to win and that no illegal activity occurred. His technique exploited inherent flaws in the equipment, which was not illegal. Despite the legal victories, he was often banned from casinos that he had beaten.

👌 Did Gonzalo Garcia-Pelayo work alone?

Gonzalo Garcia-Pelayo did not involve his family in his roulette endeavors. His son, Iván, and daughter, Vanessa, along with other family members and friends, formed a team that helped him gather data by observing roulette wheels in various casinos. They would record the results of thousands of spins, and this collected information was then analyzed by Gonzalo's computer program to identify biased wheels and favorable numbers. This family effort was crucial to their success.

❔ Can Gonzalo Garcia-Pelayo's roulette strategy still be used today?

Technically, the principle of identifying biased wheels could still be effective, but it is extremely challenging to implement efficiently in modern casinos. Following the widespread attention to Garcia-Pelayo's methods, major casinos have implemented sophisticated systems for automatic bias correction in their roulette wheels. They now use computer analysis, similar to what Garcia-Pelayo did, to constantly monitor the randomness of their wheels and quickly identify and correct any imperfections. This makes it very challenging to find a significantly biased wheel today.

Denis Anipchenko
Denis Anipchenko
Editor-in-chief and online gambling expert

Denis is a true professional with many years of experience in the gambling industry. His career started back in the late nineties when he worked as a croupier, pit boss, manager and casino manager. This unique experience allowed him to deeply understand the world of gambling from the inside. Since the late noughties Denis has dedicated himself to writing articles and analyses about gambling, and since the early tens he has become a key figure in the Casinoz team. Here he not only writes and edits content, but also creates reviews, shares his expertise and helps readers understand the intricacies of gambling. Denis combines practical experience and in-depth knowledge, making him one of the most respected experts in the industry. His writings are always up-to-date, proven and useful information for anyone interested in the casino world.

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Facts checked Alex Vasilev Scientific editor and fact checker
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