D'Alembert Roulette System

Of all the different betting patterns that we discuss the D'Alembert is probably our least favourite and that's because there isn't much profit potential and it's the kind of system where if you have a few losses, you find yourself in hole that is hard to get out of.

Still, it's a popular system that a lot of people use so our site wouldn't be complete without speaking about it and the different versions of it. Like most roulette systems it can be applied to all parts of the table but is most commonly used on the even chance bets like red and black.

The progression that you use is a very simple one: you start out with a betting unit that you feel comfortable with and after a loss you increase your bets by one unit. After a win you decrease your bets by one unit.

This process continues over and over until you're back to your starting unit size and you win, at which point you would be in profit by the size of your original wager. Here is a very simple example of how you betting progression could look.

As you can see at the right hand side of the line, on the last bet rather than reduce it to 4, it has been left at 5. This is because your starting bet was 5 so rather than decrease it, you would ride out a winning streak with the same bet size. If however you wanted to continue decreasing your bets you could do, it's a matter of personal choice.

Normally people will just bet on a colour with the D'Alembert and stick with the same one. The problem with the D'Alembert is that you need to get more wins than losses which means that the colour you're betting on will need to hit more than the other. When you look at the odds of the game, it's very unlikely that this will happen.

Another downside to the D'Alembert is if for example you were betting on red and a run of 8 blacks came up, you would find yourself in a whole that's hard to get out of. On the other end of the scale though, if you got 8 reds in a row while betting on them, you would win some money. Our advice is never to use the D'Alembert for too long.

Reverse D'Alembert

There is also a reverse version of the D'Alembert which is basically the opposite of what's been described above; you decrease your bets after a loss and increase them after a win. If you were applying the reverse method it would obviously be more profitable if you got a long chain of colours.

One thing to keep in mind with the reverse D'Alembert is that you will need to start out with a higher betting unit, probably between 5 and 10. This is because if you start at 1 and you started losing straight away, you wouldn't be able to use the correct betting pattern because you wouldn't be able to decrease your bets.