D’Alembert Strategy & System

Tips & Tricks for Roulette


The D’Alembert Roulette betting strategy was invented by French mathematician Jean le Rond d’Alembert as a way to safely determine wagers in a Roulette strategy betting progression. The D’Alembert strategy is more popular than The Martingale Roulette betting system because it favours a more flat betting system. While both the D’Alembert strategy and the Martingale strategy are classified as negative progression betting systems, the D’Alembert system is more popular because the bets made on the negative (losing) bet progression are more gradual in increase as opposed to the Martingale system, which proposes a strict and aggressive doubling of each losing bet.

The most important D’Alembert strategy facts:

  • This is a negative progression betting system
  • The system is more gradual and safer than the Martingale betting system
  • Work with even money (1:1) outside Roulette bets
  • D’Alembert system is not suited for use with Columns or Dozens of betting

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D’Alembert Roulette betting system


The D’Alembert strategy is one of the most popular of all Roulette progression betting systems and is most certainly more favoured than the Martingale betting system, both of which are considered to be negative progression betting systems since they propose an increase in bets on losing hands. The D’Alembert betting system however also proposes a decrease in bet size on winning bets. Both systems are used exclusively for even money bets. Even money bets are also known as 1:1 bets, if you wager 1 chip and win you get your 1 chip back plus an additional 1 chip for the win. Both systems also rely on the development of trends in either red or black or odds and evens, depending on what the chosen bet happens to be. The D’Alembert Roulette betting strategy distinguishes itself from its rival by offering a flatter betting system, not the double on every bet that Martingale propose, in this way the system is safer as the bet increase over a long cycle is less drastic.

The D’Alembert strategy explained by example

Implementing the D’Alembert strategy in practice is very simple and this is one of the reasons why so many novice Roulette players readily employ this betting system for their outside bets. The first step is to pick a starting bet amount. This can be whatever you like, whatever fits into your budget and you are comfortable starting with. Remember that this amount will be increasing for the duration of the cycle so it is important to pick a number that you are comfortable with.

D’Alembert Roulette betting strategy how it works

For the sake of this practical demonstration, we are going to pick a betting unit of 5.

The next step in the process is to place your bet. You can choose red or black, odds or evens as well as 1-18 or 19-36. The next step is actually implementing the D’Alembert system which works like this:

  • Increase your bet by a single unit after a losing bet
  • Decrease your bet by a single unit after a winning bet

Take a look at the D’Alembert betting system over this projected cycle of wins and losses: Starting bet:

  • Bet 5 – result: lose
  • Bet 6 – result: lose
  • Bet 7 – result: win
  • Bet 6 – result: win
  • Bet 5 – result: lose
  • Bet 6 – result: win
  • Bet 5 – result: win
  • Bet 4 – result: lose
  • Bet 5 – result: win

The mathematical string would follow thusly: 0 – 5 – 6 + 7 + 6 – 5 + 6 + 5 – 4 + 5 = 9 This particular sequence shows 4 losses and 5 wins for a profit of 9. It could also happen that one has 4 losses and 4 wins which would then correspond to the D’Alembert golden rule that, as long as wins and losses are even, you will be in a state of profit based on the number of bets placed. This short video helps to further illustrate the D’Alembert betting strategy for Roulette:


  • The D’Alembert strategy is a negative progression betting system
  • It offers a safer betting option to the Martingale betting system (also a negative progression betting system)
  • The golden rule with the D’Alembert betting system is that as long as your losing bets and winning bets eventually even out you will be in profit based on the number of bets made
  • The D’Alembert strategy can be used on red/black, odd/even and 1-18/19-39 outside (even money) bets

Other strategies you might want to check out:

  • Trend Strategy
  • Trend Betting Strategy
  • Paroli Strategy
  • Parlay Strategy
  • Martingale Strategy
  • Labouchere Strategy
  • Follow the Leader Strategy
  • Dozen Grid Strategy
  • D’Alembert Strategy

Advantages and disadvantages of using the D’Alembert strategy

AS with any of the progression betting systems that are available, the D’Alembert strategy offers both advantages and disadvantages in equal measure. On the plus side, the system offers a much safer and more gradual increase in wagers on negative or losing bets which is far more sensible than the Martingale betting system. The D’Alembert system is a negative progression betting system which means that you are still putting more money on losing bets, just not as much as Martingale which is double on every losing bet in the cycle. The biggest drawback in both systems is that you would need a massive bankroll in order to sustain a long losing cycle, granted, the D’Alembert strategy is much flatter which makes for a slower rise in bets over a long cycle but in the end, it is still risky as the cycle extends on.


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Chances and risks

Associated with the D’Alembert betting strategy

Similar to the advantages and disadvantages, examining the chances the system offers as well as the risks that one should be aware of is equally important. Answering the following three questions should help guide any decisions made when making an online casino comparison to find the best selection of Roulette games.

Who is suitable for the strategy?

The D’Alembert strategy for Roulette betting can be implemented by anyone who wants to even money (outside) Roulette bets. The system is simple enough for anyone to learn within a few minutes and it can be employed almost immediately. Novice Roulette players may find the system gives them more confidence with starting out in Roulette betting. Choosing an online casino based on a thorough casino bonus comparison will also go a long way to easing new players into online Roulette betting.

  • 83% Beginner
  • 85% Advanced
  • 89% Pro

How high is the risk?

As with the Martingale betting system for Roulette, using the D’Alembert strategy over a longer period of time or, over a longer than anticipated negative (losing) betting cycle can be extremely risky. This is the basic characteristic of any negative progression betting system as they all require the player to increase the stake on a losing bet. The D’Alembert strategy, however, is still less risky than the Martingale betting system as it does not insist on a double up on every wager on progressive losing bets.

Are winnings guaranteed?

Winnings are not guaranteed by using the D’Alembert strategy as the nature of the betting process cannot be guaranteed. In some ways, this is similar to trend betting which relies on the idea that betting on red or black moves in trends. With negative progression betting, bets are successively placed on losing hands until the bets become positive or winning bets. This cycle could take longer than a bankroll allows which means that there is no way to guarantee a win will recoup the money staked.


Is the D’Alembert strategy worth it?

There are definitely some positive aspects to the D’Alembert system. The learning curve is very low and the entire strategy only takes a few minutes to understand and implement. The strategy is a good platform for novice players to get their feet wet and, if used with caution, can assist in bet making decisions. Check out our handy tips and tricks that can help you get more out of your Roulette playing.


  • The strategy is easy to understand and you can use it very fast
  • It is based on a flat progression
  • The strategy is based on a negative progression. So you put more money in even if you loose


  • Sign up with an online casino that offers a practice or demo mode so that you can practice with the D’Alembert strategy before playing with real money
  • Make sure that the casino offers a good welcome bonus that you can use to boost your bankroll which will help you in the early stages of outside betting with the D’Alembert system
  • Set loss and betting limits and stick to them, rather write off a small loss if you see that your bankroll simply won’t sustain a longer cycle. This is the only way to use negative progression betting safely