Niko Tosa – the Croatian Roulette Genius
Not the Ritz’s Most Popular Player!
Have you heard of Croatian roulette guru Niko Tosa?
He reckons he has taken multiple casinos around the world to the cleaners and won millions. His secret?He puts it down to practice and focus.
Niko Tosa shocked the Ritz Club casino in 2004 with a big winning streak.
Niko, along with two accomplices were arrested in London after scooping £1.3 million at the Ritz Club over several sessions.
You can make various bets: either that the ball will land on a specific number or within a zone on the wheel. Betting continues until the croupier in charge of the wheel calls “No More Bets”.
They were accused of roulette wheel clocking with lasers and microcomputers. However, Scotland Yard was unable to produce any evidence of cheating, and dropped the charges.
Tosa claims his system is simple, but requires dedication. First, you need to hunt down an imperfect wheel that has a slight bias or defect. Then, his technique involves mentally estimating zones where the ball will land once it is in motion, a technique honed over weeks of practice on a home wheel.
Croatian Roulette Guru
Tosa, who comes from a small Croatian village, laughed at the accusation that he used sophisticated technology, simply stating: ‘We are peasants.’
Tosa is not his real name, which is a pseudonym used in an interview with Bloomberg. The news outfit agreed to conceal his real name as a condition of the interview.
He is in his 50s, and lives in a small coastal village south of Dubrovnik, Croatia.
Tosa admits to using other pseudonyms at casinos around the world undetected, and says he has been assaulted several times by casino security teams maddened by his success.
International Player
He has been seen at roulette tables in Romania, Poland, Slovakia, and Kenya, as he travels further afield and plays at casinos where he won’t be recognized and thrown out.
For the most part, Tosa has kept a low profile apart from the dispute with the Ritz Club in London on March 15, 2004.
In 2004, Tosa visited several nights in a row with two friends, a Serbian called Nenad Marjanovic, and Livia Pilisi, a beautiful; 32-year-old blonde Hungarian woman. They chose a roulette table in the Carmen Room, a secluded area reserved for VIPs, and stated to play with a strategy that caught everyone’s attention..
Niko Tosa, Nenad Marjanović and Livia Pilisi would wait until six or seven seconds after the dealer released the ball, and when the pace of the noise of the ball on the wood began to slow, they would quickly place their bets covering as many as 15 numbers at once in hot zones.
The three were synchronised with their movements, and the security team became more and more concerned as their winnings piled up. They didn’t win every spin, but were defying the odds with streaks of eight, ten, or even thirteen wins in a row.
And they built up their bets, betting up to £15,000 on a single spin.
How Did They Do It?
But the way Tosa and his friends played at the table was pretty unique, even at the Ritz.
The team would wait six or seven seconds after the croupier launched the white ball around the rim of the wheel, then quickly lean forward to place their bets on the table before “No More Bets Please” was announced. Always at the same time interval.
They would cover up to fifteen numbers on each round. They moved in such as coordinated fashion, it was “as if someone had fired a starting gun,” the table manager told investigators afterwards.
They were playing on a standard European single-zero wheel with 36 red and black numbered pockets plus the zero.
Tosa’s team also liked the orphelins (orphans bet) or le tiers du cylindre (a third of the wheel). Neighbours Bets were also played, (one number plus two on each side, five numbers in total).
It all points to favouring hot zones on an imperfect wheel.
Investigated for Fraud
Security teams watching on CCTV noticed that Tosa, who was the team leader, ‘read the room’ and made a visual scan of the casino on entry and choice one table. He explained later that often it was a table that he had been successful on before, after it had been moved to another location. This again backs up the imperfect wheel theory.
The team of three, who began with a few thousand pounds, built their bank-roll to £1.3 million. When the Croat left the Ritz in the early hours of March 16, he turned £30,000 into £310,000. His Serbian friend did even better, building his pot to £684,000 from an initial £60,000. Tosa and the Serbian did most of the gambling while their female friend ordered the drinks. Veuve Cliquot by the sound of it.
When Tosa and his partners returned to the Ritz, police were waiting, and arrested them on suspicion of ‘deception’.
The Investigation
Scotland Yard searched the team but found no devices. Their mobile phones and a Palm-Pilot type device found on them did not appear suspicious during analysis.
Investigators dismantled the roulette table looking for hidden devices, watched detailed CCTV footage of the team, and interviewed the croupier from the table, but came up with nothing.
After a nine months, Scotland Yard dropped the case, and returned the roulette winnings to Tosa and his team and informed them that they were free to walk away with their winnings.
Tosa’s System
The best explanation is that Tosa’s system was based on Hot Zones, or Neighbours’ bets, in which a bet is placed on a certain number and several numbers either side of it. The Call Bets such as Orphelins (orphans), Voisins du Zero or le Tiers du Cylindre (a third of the wheel) also helped with this strategy.
The state of the wheel is the important factor, and the team searched for tables where a slight defect or bias reduced the randomness of the game.
Albert Einstein is reported to have said: ‘No one can win at roulette unless he steals money from the table while the croupier isn’t looking.’ Well, it looks like Tosa and his team have proved him wrong.
Tosa joins a list of players that claim to have cracked the roulette code. Dr. Richard Jarecki also claimed to have cracked the code – he also looked for imperfect wheels.
Casinos of the world watch out! Tosa is going on tour again sometime soon, and he has a big selection of fake beards and wax noses.
If Tosa hadn’t been stopped at the Ritz, he reckoned that he would have returned the following day and won £10 million.
The Ritz got off lightly.
Can you repeat this trick online? In theory, yes, on a live dealer wheel. But spotting an imperfect wheel online is very hard, some would say impossible.
The Ritz Club casino in London closed in March 2020, when it stopped operations just before the first UK Covid lockdown, and it was later confirmed as permanently closed at the end of May 2020.
Sorry Niko, you’ll need to clean out another casino!
FAQs
Questions
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Who is Niko Tosa and why is he famous in the roulette world?
Niko Tosa is a Croatian high‑stakes roulette player known for his legendary winning streak at London’s Ritz Club in 2004, where his three‑person team won about £1.3 million over a few sessions before being arrested and later cleared of cheating. His story became famous because investigators could not prove any cheating, which forced the casino to confront the uncomfortable idea that a player might beat roulette using observation, physics, and wheel imperfections.
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How did Niko Tosa beat roulette?
Studies suggest that Tosa combined two ideas: exploiting small physical imperfections or “bias” in a wheel and using a form of visual or “cerebral” clocking to estimate where the ball would land as it slowed. Rather than calling a single number, he reportedly waited until the final seconds of the spin, then covered a hot zone of up to 15 numbers in the predicted area, turning a small edge into big absolute wins.
- Did Niko Tosa use hidden technology or cheat with devices?
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What exactly is “cerebral clocking” in roulette?
“Cerebral clocking” is a term used to describe mentally timing the rotation of the wheel and ball to estimate the sector where the ball will most likely drop, without using any timing devices. In Tosa’s case, this means training your mind so that, after several seconds of observing a spin, you can mentally map hot landing zones, then lay late bets into that zone to achieve a player rather than guessing randomly across the layout.
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How important are wheel imperfections in Tosa’s method?
Most analyses of Tosa’s play focus on his obsession with finding a specific wheel that had a tiny tilt or defect, creating a “drop zone” where the ball tended to settle more often. In the Ritz, he was seen scanning the floor, then locking onto a particular wheel that had apparently been moved but was already familiar to him, suggesting that identifying and tracking a biased wheel was central to his system.
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What role did his teammates play?
Tosa did not play alone; he played with at least two team members who sat on either side of him at the table. Accounts describe the trio waiting five to seven seconds after the ball was launched, then moving simultaneously to place coordinated neighbour bets, with his partners helping to cover the predicted sector quickly during the final betting window.
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Why couldn’t the casino simply stop him from playing?
Casinos can and do remove players they suspect of exploiting mechanical biases, but the Ritz Club faced a dilemma: Tosa’s team broke no written rule, appeared to be betting normally, and no devices were found on him. Rather than risk a protarcted legal battle over “thinking too well,” the casino paid his winnings, and the case became a cautionary tale about the limits of house control when games aren’t perfectly random.
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Did Niko Tosa change how casinos manage roulette?
His story emphasised the importance of wheel maintenance, regular wheel rotation on the floor (although this didn’t help the Ritz), and tight surveillance of late betting patterns around specific sectors. Casinos became more diligent in checking for wheel bias, rotating wheels between tables, and enforcing earlier “No More Bets” announcements to minimise the window in which a well‑trained observer could exploit an imperfect wheel.
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Where is Niko Tosa today?
Niko Tosa keeps a low profile, with no confirmed public sightings or updates on his current location. Reports from interviews and articles describe him as living in a small coastal village south of Dubrovnik, Croatia. He is believed to be alive and actively playing roulette under pseudonyms, traveling internationally to casinos where he is unknown, such as in Romania, Poland, Slovakia, or Kenya, though casinos have tightened measures and shared information about his techniques.