Last updated on May 4th, 2021 at 11:24 am

d’Alembert Strategy

As with many roulette systems, whether in the real casino or roulette in an online casino, the d'Alembert system is also based on betting on single odds. This means:

  • Red or black
  • 1 to 18 or 19 to 36
  • Even or odd

The number 0 will in all cases lead to a losing bet.

d'Alembert system at an European roulette table

How does d'Alembert system work

This is yet another progressive roulette strategy. To begin with, the premise of this strategy is similar to the Martingale system with two important differences.

First, the progression of bets after losses only goes up one unit instead of doubling. A unit represents the initial base amount you decide to use. If the base bet is $1, your unit of measure is 1. Therefore, your first bet would be $1. If it loses, your net bet would be $2. If that bet loses, the next bet would be $3. You can see the progression in losses.

That brings us to the second difference between Martingale and d'Alembert strategy. Winning bets do not automatically result in you going back to the base bet of $1. Instead, you would decrease each winning bet by 1 unit or $1 until you bet back to the base bet.

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One step forward and one step back

In fact, the d'Alembert strategy comes down this: you go a step forward (up) in your bets when you lose and a step back (down) in your bets when you win. You don't quit your online roulette game until you get back to your original initial bet, and then you could start all over again.

Here too it is important that your bankroll is sufficient and that you can absorb setbacks. The advantage compared to, for example, Martingale , where you double your bet every subsequent step, is that with the d'Alembert system only 1 extra ‘unit' has to be used for each new bet.