Andrucci Method – Roulette “Chaos Theory” Betting
The Andrucci Method is a roulette betting approach rooted in the idea that certain numbers can be “hot” due to bias or short-term streaks.
Players observe the wheel for 30–37 spins, track results, and then target the most frequent numbers.
Often nicknamed the “Chaos Theory” in roulette circles, it’s exciting but risky — and the maths says the house edge still wins long-term.
Play Andrucci at UKGC-licensed roulette sites
Test it on secure, regulated platforms with fast GBP payouts and fair wheels.
T&Cs (18+)
First deposit only.This offer is only available for first time depositors. Min deposit is £10.80 Free Spins on Big Bass Bonanza. Spin Value: £_0.10. This offer cannot be used in conjunction with any other offer. This offer is only available for specific players that have been selected by PlayOJO. If you have arrived on this page not via the designated offer via PlayOJO you will not be eligible for the offer. Irregular play may lead to removal of reward. OJO’s Rewards and Game policy applies.
T&Cs (18+)
18+. New players only. One bonus offer per player. Minimum deposit £20. Max bonus bet £5. Bonus funds must be used within 30 days and bonus spins within 10 days, otherwise any unused shall be removed. 200 bonus spins are valid on Gonzo’s Quest and Starburst only. Bonus spins credited at 40 per day over five days, triggered on first deposit. Bonus spin winnings credited as bonus funds and capped at £100. Bonus match offers: 100% up to £300 (1st), 75% up to £300 (2nd), 50% up to £300 (3rd), 25% up to £300 (4th), and 100% up to £100 (5th). Bonus funds are separate from cash funds and subject to 35x wagering on bonus funds only. Terms apply. BeGambleAware.org
T&Cs (18+)
This offer is for new customers only and is available once per household. Minimum deposit and wagering on sport to activate the Bet token is £10. The Welcome Bet token must be used at www.mrplay.com within 14 days of being credited to your account. Offer only applies to players who are residents of United Kingdom, Ireland, Norway, Finland, Germany and Canada.
Origins & Concept
The Andrucci system takes its name from an Italian gambler who popularised the concept of “number dominance” in the 1990s. The theory draws loosely from chaos theory in mathematics — the idea that complex systems can produce patterns that repeat in the short term.
In roulette, Andrucci advocates believe certain numbers may appear more often during a session due to subtle wheel imperfections or random clustering.
Modern casinos maintain wheels to minimise bias, but the method still has fans who enjoy the thrill of identifying and betting on “hot” numbers.
How to Use the Andrucci Method
- Observation phase: Watch 30–37 spins without betting. Record every result.
- Tracking sheet: Use a table to count how often each number appears.
- Identify hot numbers: Pick 1–5 numbers that appear most frequently.
- Betting phase: Place straight-up bets on these numbers for 20–50 spins.
- Review: Assess profit/loss and decide whether to restart tracking.
| Number | Tally | Number | Tally |
|---|---|---|---|
| 0 | 18 | ||
| 1 | 19 | ||
| 2 | 20 | ||
| 3 | 21 | ||
| 4 | 22 | ||
| 5 | 23 | ||
| 6 | 24 | ||
| 7 | 25 | ||
| 8 | 26 | ||
| 9 | 27 | ||
| 10 | 28 | ||
| 11 | 29 | ||
| 12 | 30 | ||
| 13 | 31 | ||
| 14 | 32 | ||
| 15 | 33 | ||
| 16 | 34 | ||
| 17 | 35 |
Fill in the tally during your observation phase to identify hot numbers objectively.
Best Bets for the Andrucci Method
| Bet Type | Payout | Probability (EU) | Risk Level |
|---|---|---|---|
| Straight-Up (1 number) | 35:1 | 2.70% | Very High |
| Split (2 numbers) | 17:1 | 5.41% | High |
| Street (3 numbers) | 11:1 | 8.11% | Medium-High |
| Corner (4 numbers) | 8:1 | 10.81% | Medium |
Most Andrucci players stick to straight-up bets for the full 35:1 payout on hot numbers.
Worked Examples Over 50 Spins
Example 1: Hot Number Hits
Observation: 17 appears 5 times in 37 spins.
Betting phase: £1 on 17 for 50 spins.
Result: Hits twice → +£70 winnings, £50 staked → Net +£20 profit.
Example 2: Hot Number Fails
Observation: 29 appears 4 times in 37 spins.
Betting phase: £1 on 29 for 50 spins.
Result: Hits once → +£35 winnings, £50 staked → Net -£15 loss.
Results vary widely — variance is high on straight-up bets.
Pros & Cons of the Andrucci Method
- Engaging observation phase
- Potential for big payouts if hot numbers hit
- Simple to track with a sheet
- Doesn’t change house edge
- High variance & risk of quick losses
- Time-consuming observation
Andrucci vs Martingale
Martingale targets outside bets and doubles stakes after losses for faster recovery — but with higher risk of hitting limits or going broke.
Andrucci focuses on straight-up bets for high payouts, but wins are less frequent and variance is greater.
The two systems have entirely different risk profiles.
Common Mistakes
- Overcommitting bankroll to one number without diversification
- Extending play too long — variance will catch up
- Believing past spins affect future results
- Ignoring table limits when chasing hot numbers
Try the Andrucci in Practice
Use our free roulette game to practise tracking and betting before risking real money at UKGC sites.
T&Cs (18+)
First deposit only.This offer is only available for first time depositors. Min deposit is £10.80 Free Spins on Big Bass Bonanza. Spin Value: £_0.10. This offer cannot be used in conjunction with any other offer. This offer is only available for specific players that have been selected by PlayOJO. If you have arrived on this page not via the designated offer via PlayOJO you will not be eligible for the offer. Irregular play may lead to removal of reward. OJO’s Rewards and Game policy applies.
T&Cs (18+)
18+. New players only. One bonus offer per player. Minimum deposit £20. Max bonus bet £5. Bonus funds must be used within 30 days and bonus spins within 10 days, otherwise any unused shall be removed. 200 bonus spins are valid on Gonzo’s Quest and Starburst only. Bonus spins credited at 40 per day over five days, triggered on first deposit. Bonus spin winnings credited as bonus funds and capped at £100. Bonus match offers: 100% up to £300 (1st), 75% up to £300 (2nd), 50% up to £300 (3rd), 25% up to £300 (4th), and 100% up to £100 (5th). Bonus funds are separate from cash funds and subject to 35x wagering on bonus funds only. Terms apply. BeGambleAware.org
T&Cs (18+)
This offer is for new customers only and is available once per household. Minimum deposit and wagering on sport to activate the Bet token is £10. The Welcome Bet token must be used at www.mrplay.com within 14 days of being credited to your account. Offer only applies to players who are residents of United Kingdom, Ireland, Norway, Finland, Germany and Canada.
Andrucci Method – FAQs
How long should I observe before betting?
30–37 spins is standard to spot possible hot numbers.
What numbers should I pick?
Top 1–5 most frequent in your observation period.
Does it work on American roulette?
Yes, but the higher 5.26% house edge makes long-term success less likely.
Can I split bets between hot numbers?
Yes, splitting reduces variance but lowers max payout.
Can this method beat the casino?
No — the house edge remains constant. Use for entertainment, not guaranteed profit.