The D’Alembert Roulette Strategy

The D’Alembert Roulette Strategy

Published Date · Nov. 12, 2021 · Last Updated · Nov. 7, 2023 ·Read Time · 4 mins

The D’Alembert roulette system is an even-money betting method used in roulette table and roulette wheel games. The new casino game strategy was modelled after the original mathematical system French mathematician in the 1700’s.

Like the more aggressive Martingale strategy, each time you lose, you increase the size of the bet the following round. However, these money bets only increase by a unit size of 1, making it a much safer gambling technique.

The system depends on an equal number of reds appearing as blacks, odds appearing as evens, and so on. The odds are also still in the house’s favour, so as with most casino games, losing your winnings quickly is, of course, still possible.

The D’Alembert Roulette Strategy Explained

If you’re using the roulette strategy D’Alembert system, all of your money is placed on the even-money sections of the table and will pay out 1 for 1.

It works by placing an initial bet — let’s say £5 — onto the table. Then, if your initial spin loses, you’ll place a second bet of £6 down, and so on if you’re experiencing consecutive losses.

If you have a win, you’ll decrease your bet size by 1 unit and continue to decrease it until you experience another loss. So if your size of bet has increased to £8 and you win, your next size of bet would go down to £7, and then so on until you lose and increase its size again. 


What is the Reverse D’Alembert Roulette System? 

Most gambling strategies that exist typically have a reverse method. This is also true of the D’Alembert roulette system.

The reverse D’Alembert roulette system, also known as the contra D’Alembert roulette system, is very similar to the traditional D’Alembert roulette strategy but with one key difference. Instead of increasing your bet after a loss, you decrease it, and after a win, you increase it.

So, let’s say your initial bet is again, £5. If you have a losing spin, your bet decreases by 1 unit, to £4.

If you win a bet, you’ll increase by 1 unit, to £5, followed by £6 if you win again, and so on.

Like with the traditional D’Alembert roulette system, your profits are the number of bets you won. In other words, if you want to be profitable using this strategy, you’d have to win more than you lose. If you win the same amount or more than you win, you’ll likely end up experiencing a loss. 

Does the D’Alembert system work for roulette? 

As stated before, the D’Alembert roulette strategy is particularly popular with those wanting to manage their risk more carefully.

It has the potential to be a successful technique for betting, provided you win more than you lose.

Of course, if you were on a losing streak, to begin with, or you lose more than you win overall, you can end up being at a loss.

Is the D’Alembert strategy legal? 

The D’Alembert strategy is 100% legal around the world. This age-old gambling technique is allowed in both online casinos and brick and mortar establishments.

This is because you’re using maths to increase your odds rather than physical manipulation (illegal in all casinos and betting sites).

The good news? No one to date has ever been kicked out of a reputable casino for using the D’Alembert roulette strategy, so rest assured that it’s highly unlikely you will either.


Overall, the D’Alembert method can be a good strategy for you to use if you’re gambling to help increase your chances of winning on the roulette wheel and roulette table. But like with the majority of gambling methods, this gambling system is only effective if you win more than you lose. 

The Best D’Alembert sequence depends on how much you put down for your money bets and whether you’re having a winning or losing streak. 

For example, with the reverse D’Alembert roulette system, because you increase your bet size with each win, you can lose all or most of your winnings very quickly if you do lose once or more. 

However, using the traditional D’Alembert roulette strategy can make it difficult to recover from losses as you increase the bet’s size with each loss. This can make losses add up quickly if you’re on a losing streak. Equal wins and losses can allow you to finish at break-even, but this isn’t always the case. 

Finally, as always, the house has a competitive edge over you, regardless of what strategy or technique you choose to use. Therefore, to manage risk and protect you from financial ruin, a stop loss is a must.

Test out this strategy for yourself with our selected casinos for roulette.


Matthew Wojciow

Content Writer