Best Roulette Strategy: D’Alembert, Explained

What's D'Alembert? No, it's not a fancy's one of the most popular roulette betting strategies. Read on to learn more about how to use it to strengthen your roulette game.


So, what’s D’Alembert when it comes to a roulette strategy? You might think playing roulette simply involves tossing a ball into the wheel and hoping for the best, but for some players, there’s a method to the madness. This method? D’alembert roulette strategy.

Read on for our examples, and to learn whether or not this strategy is right for you.

What’s D’Alembert Betting Strategy?

Considered one of the best types of roulette strategy, the D’alembert betting strategy involves placing bets on even-money parts of the table. Quite similar to the Martingale strategy, with one catch — the doubling down method is more restrained.

This method was created by Jean-Baptiste le Rond D’Alembert, a mathematician from France.

Simply put, you decide on a unit before betting, which could be one chip, or a specific amount of money. When you lose your bets, increase your bet by one of your pre-decided unit, and when you win, decrease it by one unit.

But what’s the logic behind the mathematician’s idea, I hear you ask? Well, this is an even chance betting system, and the reasoning behind this is that your even bets will eventually ‘equal’ out, as the game essentially offers a 50/50 outcome.

But, like always — be cautious that it’s still gambling. You may have high and low streaks, and it’s important to know when to bow out to avoid mismanaging your bankroll.

D’Alembert Strategy Example

Round # Stake Win/Lose Net Profits
1 $1 Lose -$1
2 $2 Lose -$3
3 $3 Lose -$6
4 $4 Lose -$10
5 $5 Win -$5
6 $4 Lose -$9
7 $5 Lose -$14
8 $6 Win -$8
9 $5 Win -$3
10 $4 Win $1

If you entered a winning streak after this, your next few moves may look like this until your wager comes back to $1.

11 $3 Win $4
12 $2 Win $6
13 $1 Win $7

The Reverse D’Alembert may be more profitable, but you’d have to be lucky! We’ll follow the same hypothetical win/lose order, but this time, we’ll increase the bet amount after a win and decrease it after a lose. We’re starting at $1 so the first your bets won’t increase or decrease.

Round # Stake Win/Lose Net Profits
1 $1 Lose -$1
2 $1 Lose -$2
3 $1 Lose -$3
4 $1 Lose -$4
5 $1 Win -$3
6 $2 Lose -$5
7 $1 Lose -$6
8 $1 Win -$5
9 $2 Win -$3
10 $3 Win $0

And, again, if you kept winning, your next three moves would look like:

11 $4 Win $4
12 $5 Win $9
13 $6 Win $15

This of course is also riskier, because you could wind up losing a larger sum of money fast. However, as long as your net winnings are higher than your bet amount, you can still walk away with some cash.

Is The D’Alembert Roulette Strategy Safe?

If you’re comfortable with roulette, and are confident in your ability to effectively manage your bankroll, the D’Alembert roulette strategy is safe — yes, it’s worth giving it a try.

It presents less risk than the Martingale strategy, and can even be used for games like online craps (when placing pass or don’t pass wagers) or baccarat (player or banker bets), where even and odd bets are available to make.

Looking to get back to basics? Refresh yourself with our best tips for online casino games, online roulette strategy.

Joseph Ellison

Joseph is a dedicated journalist and horse racing fanatic who has been writing about sports and casinos for over a decade. He has worked with some of the UK's top bookmakers and provides Premier League soccer tips on a regular basis. You'll likely find him watching horse racing or rugby when he isn't writing about sport.

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