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Differential Betting System Explained

Jennifer Lynn Written by Jennifer Lynn
Richard Grant Reviewed by Richard Grant

Differential Betting System Explained


The world of roulette betting systems is vast, with various strategies designed to optimize your chances of winning. One such intriguing method is the Differential Betting Strategy, which is a modification of the Contra D’Alembert Progression. This strategy is unique in that it doesn’t focus on bet selection or progression in isolation. Instead, it aims to capitalize on the laws of deviation and balance that govern even money chances. In this article, we’ll delve into the intricacies of this strategy, how it differs from its parent system, and how it can be applied to different roulette scenarios.

Differential Betting SystemWith A Modification Of The Contre D`Alembert Progression Systems using flat bets generally contain long-lasting stagnation phases, which make a strategic play uneconomic: expenditure of time and the yield are in no profitable relation to each other.

Based on this realization and the fact that even money chances are ruled by both the law of deviation (ECART) and the law of balance (EQUILIBRIUM), it is quite possible to utilize the strategy of differential betting.

Differential betting strategy is not a bet selection or a progression, because it can be used only if two chances are attacked at the same time.

Differential betting can never be accomplished with flat bets since all bets would be zero!

Differential betting is only possible if two chances (for example RED / BLACK) are followed with a progression. Here for each chance, the respective progression bet size is determined separately, however, only the difference is wagered.

The Contra D’Alembert Progression System

The original D’Alembert Progression system is a negative or “up as you lose” progression. Starting always with a bet size of 1 unit, the bets are raised after each loss by 1 unit and lowered by 1 unit after a win.

The Contra D’Alembert Progression is a reverse of the original or “up as you win” progression.

The first bet of the progression is also 1 unit. After a win, the bet is raised by 1 unit and after a loss, the bet is lowered by 1 unit.

In the following example, we bet for ease of demonstration on EVEN numbers:
Differential easy betting

Using the Contra D’Alembert progression the spin run above would produce a total loss of 7 units within 14 spins.

In permanence sections where the deviation dominates, the Contra D’Alembert produces gains very fast, but the progression loses 1/2 unit per placed bet if the permanence balances itself out.

The same spin run using differential betting:
· EU: units on EVEN
· BE: balance EVEN
· OU: units on ODD
· BO: balance ODD
· TB: total balance
Differential Betting same spin

The result of -4 is slightly better than the first result, however, is not very satisfying.
Using a modification after a lost bet shows better results.
The modification is simply to reset to a bet size of 1 unit after a loss. See the next table:
Differential Betting modification

The spin run is balanced (7 even numbers and 7 odd numbers). The result is neutral.

Now let us take a look at a spin run with a stronger deviation towards one chance.

Here we use the chances BLACK and RED:
Differential use black or red

Since we do not know on which chance the deviation will occur, differential betting is obviously a good strategy to achieve gains be it a deviation towards BLACK or be it a deviation towards RED. The BLACK side loses 19 units and the RED side wins 29 units. Net gain of 10 units with the highest downswing of 5 units if you look at the Total balance. Seems to be not too dangerous.

Almost every progression (negative or positive) is usable for differential betting. Other roulette strategies you may use are the Fractional Betting system, Garcia system or The Guetting Progression system.


Differential betting offers a nuanced approach to roulette, allowing players to capitalize on both deviation and balance in even money chances. By using the Contra D’Alembert Progression as a base, this strategy provides a dynamic way to manage your bets, making it adaptable to various game scenarios. Whether the game leans towards BLACK or RED, or EVEN or ODD, differential betting can be a useful tool in your roulette strategy toolkit. While it may not guarantee wins, it does offer a more balanced risk profile, especially when used in conjunction with other systems like the Fractional Betting system, Garcia system, or The Guetting Progression system. As always, remember to gamble responsibly and understand that no strategy can overcome the house edge entirely.

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About the author

Jennifer Lynn
Head of Content
Jennifer Lynn has spent 14 years working in the online casino industry, making her a real expert in the field. She's not just skilled at writing about casinos; she also has a deep interest in online gambling games and is a passionate researcher and player. Jennifer offers her expertise on a range of casino games and the smart strategies to use. But her life isn't all about gambling and casinos. She also loves riding horses and practicing yoga, showing that she knows how to balance her professional interests with personal passions.
Last Updated: Jun 20, 2024
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