The d’Alembert system can be used on a number of different casino games, but it is very well suited, and popular when playing Roulette. The system is based around a negative progression approach, and can only be used when playing the even chances bets on Roulette (Red or Black, Odd or Even, High or Low numbers).
The system itself is very simple to play, but it is not one that is going to win you hundreds of chips. The flip side of this is that you won’t lose hundreds of chips either. But the amount you win will of course depend on the denomination of the chips you are playing. But many Roulette players like to play the d’Alembert Roulette system, as they feel it can often lead them to finishing ahead.
How the d’Alembert Roulette system works
As mentioned, you need to be playing any of the even money outside chance bets on Roulette when using the d’Alembert Roulette system. The way it works is that when you bet loses you increase it by one chip on the next spin. When the bet wins, you take one chip off the winning bet. So a quick breakdown of how a hypothetical spin sequence, along with the d’Alembert system would look like are as follows:
- Spin 1 – bet 3 chips – lose
- Spin 2 – bet 4 chips – lose
- Spin 3 – bet 5 chips – win
- Spin 4 – bet 4 chips – lose
- Spin 5 – bet 5 chips – win
- Spin 6 – bet 4 chips – win
- Spin 7 – bet 3 chips – lose
- Spin 8 – bet 4 chips – win
So the maths behind this is as follows:
0 – 3 – 4 + 5 – 4 + 5 + 4 – 3 + 4 = 4
So even though you had four wins and four losses in the 8 spin sequence, you came out four chips ahead. The amount you win will of course depend on the denomination of the chips you are playing.
The benefits of the d’Alembert Roulette system are that is extremely easy to play, fairly low risk and you do not need much to play this system. Of course if you wanted to play higher denomination chips then obviously the risk of losing more becomes greater. This system is not by any means a ‘sure’ bet, there is always the risk of losing. But the risks are lower than a lot of Roulette strategies, and when you do lose it is not usually a lot.
Contre d’Alembert system
Some mathematicians have flipped this system on its head, and reversed the way in which it is played. They called this the Contre d’Alembert system (reverse d’Alembert system), and instead of increasing your bet by one chip when you lose, you now reduce it by one. And instead of reducing the bet by one chip when you win, you now increase it by one chip.
The benefit of using the Contre d’Alembert Roulette system is that if you do go on a losing streak you will not lose as much, and when you go on a winning streak you will win even more. So it is definitely worth giving this system a try too, just to compare and see which one works best for you.
See more effective Roulette tips here