D’Alembert Roulette Strategy

Amelia SmithWritten by Amelia SmithWilliam ThompsonReviewed by William ThompsonLast reviewed 10 January 2026

Over the years, many various betting strategies have been used when playing roulette. As a New Zealand player, you may want to become familiar with some of these if you plan to play roulette for money online. One of the more popular strategies that is seen being used is the D’Alembert strategy. This is a safe betting system to use as it has a smaller rate than the popular Martingale strategy.

With the D’Alembert option, you are using an even chance betting system, so it can be used when you place any bet on the table that has even odds. This includes 1-18/19-36, Red/Black, and Odd/Even. Based on the math and theory used when developing this system, it is not a suitable option for betting on columns, dozens, or when placing inside bets.

Table of contents

D’Alembert Roulette Strategy
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Using the D’Alembert Strategy

The D’Alembert strategy is a negative progression betting system designed for even-money bets in games like roulette. It involves adjusting your bet by one unit based on the outcome of the previous round:

  • Increase your bet by one unit after a loss.
  • Decrease your bet by one unit after a win.

This method aims to balance wins and losses over time, potentially leading to a profit if the number of wins equals the number of losses. For example, if you start with a bet of 5 units and lose, your next bet will be 6. If you lose again, you increase to 7 units. After a win, you decrease back to 6. Over multiple rounds, the goal is to achieve a net profit through small adjustments.

Advantages icon

D'Alembert Advantages

While no betting strategy can completely eliminate risk, the D’Alembert system offers notable benefits:

  • Requires a relatively small bankroll to implement effectively.
  • Minimizes losses over time compared to more aggressive betting strategies.
  • Easy to understand and apply without complex calculations.
  • Helps avoid surpassing table maximum limits due to its gradual progression.

These features make it a popular choice for players seeking a low-risk betting strategy.

d'alembert

A picture of Jean le Rond d'Alembert, a French Mathematician.

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Drawbacks to Note

Despite its advantages, the D’Alembert strategy has several drawbacks:

  • Relies on achieving an equal number of wins and losses, which rarely occurs in practice.
  • Potential payouts are lower due to the system’s conservative nature.
  • Extended losing streaks can lead to significant losses, as recovering requires an equivalent winning streak.
  • Does not alter the house edge, which remains constant in games like roulette.

Players should approach this strategy with realistic expectations, understanding its limitations in overcoming the inherent advantage of the house.

Reverse icon

The Reverse D’Alembert System

Another variation of this strategy is the Reverse D’Alembert, where you increase your wager after a win and decrease it after a loss. This approach capitalizes on winning streaks while minimizing losses during unfavorable streaks. However, the overall effectiveness depends heavily on the sequence of wins and losses, just like the standard method.

FAQ icon

Frequently Asked Questions

What is the D’Alembert betting system?

The D’Alembert system is a betting strategy where you adjust your bet by one unit after each loss or win. It is designed for even-money bets in games like roulette and aims to balance wins and losses over time.

Is the D’Alembert strategy suitable for beginners?

Yes, the D’Alembert strategy is simple and easy to understand, making it a good choice for beginners looking for a structured approach to betting.

Does the D’Alembert system guarantee profits?

No, like all betting strategies, the D’Alembert system does not guarantee profits. It cannot overcome the house edge inherent in casino games.

What are the risks of using the D’Alembert strategy?

The main risks include extended losing streaks, which can lead to significant losses, and the reliance on an equal number of wins and losses to achieve a profit.

How does the Reverse D’Alembert differ?

The Reverse D’Alembert increases bets after wins and decreases them after losses. It aims to capitalize on winning streaks but carries similar risks to the standard system.

Who should use the D’Alembert system?

The system is best for players with moderate bankrolls who prefer a low-risk, straightforward betting strategy. However, it is not ideal for those looking for guaranteed profits or high payouts.

Written by
Amelia Smith

Amelia Smith

15+ years experience • Marketing & Casino Games

Writing for this site since 2019, Amelia has more than 15 years of experience in the gambling industry and has authored the majority of our content. She focuses on explaining casino games, payment methods, and related topics in a clear and practical way for players.

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