D’Alembert Betting Strategy

The d’Alembert is another popular betting strategy UK players like to use when they play roulette.

Like most strategies to win money playing roulette online, it’s a progressive betting system. French mathematician Jean le Rond d’Alembert invented it in the 1800s.

The d’Alembert strategy avoids large losses rather than aiming for massive wins.

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d'Almbert Betting Strategy

How Does the d’Alembert Betting System Work?

Low-stakes roulette players who bet on even money such as Red/Black, Odd/Even, or High/Low can use it.

The d’Alembert betting system is more conservative than the Martingale or Grand Martingale.

UK gamblers can increase and decrease their bets when they play at the best roulette sites. If your base bet is £10, and you lose, increase your next bet with one unit.

For example, if you start with £10 and lose, your next bet will be £20. Win, decrease your next bet by one unit.

If you win a £20 bet, your next bet will be £10 again.

Example of d’Alembert in Action:

  • First Bet: $10 on red, lose.
  • Second Bet: $20 on red, lose.
  • Third Bet: $30 on red, win.
  • Fourth Bet: $20 on red, win.
  • Fifth Bet: $10 on red, lose.
  • Sixth Bet: $20 on red, win.

As you can see from the above illustration there’s a lot of going back and forth. Your base betting unit should be at least 1% of your bankroll.

Make sure you never go below 5%. Whether you win or lose with the d’Alembert betting strategy keep on adjusting your bets.

Testing the d’Almbert Betting Strategy

We tested the d’Alembert betting system for 100 spins with a bankroll of £1000. Our base unit was £5 per spin.

That gave us 10 spins playing European roulette online for real money with a house edge of 2.7%.

We’ll walk you through our 10 spins and an approximate 50% win rate:

  • Spin 1: Bet £5, Win (Bankroll: £1005, Next Bet: £5)
  • Spin 2: Bet £5, Lose (Bankroll: £1000, Next Bet: £10)
  • Spin 3: Bet £10, Lose (Bankroll: £990, Next Bet: £15)
  • Spin 4: Bet £15, Win (Bankroll: £1005, Next Bet: £10)
  • Spin 5: Bet £10, Win (Bankroll: £1015, Next Bet: £5)
  • Spin 6: Bet £5, Lose (Bankroll: £1010, Next Bet: £10)
  • Spin 7: Bet £10, Lose (Bankroll: £1000, Next Bet: £15)
  • Spin 8: Bet £15, Win (Bankroll: £1015, Next Bet: £10)
  • Spin 9: Bet £10, Lose (Bankroll: £1005, Next Bet: £15)
  • Spin 10: Bet £15, Win (Bankroll: £1020, Next Bet: £10)

Factors Affecting Results:

  • Win/Loss Streaks: Extended winning or losing streaks have an impact on your bankroll.
  • Even-Money Bets: It’s best to use the strategy on even-money bets like red/black in roulette.

So, what did we learn? With a £1000 bankroll and a base unit of £5 over 100 spins, it’s safe to use the d’Alembert system.

We gradually increased and decreased our bets, and therein lies the key. It helped us to manage the risk using the betting system more effectively.

We only made a small profit of 10 quid despite a few fluctuations. Therefore, we can safely say it’s not as rough as the Martingale.

Another thing we’ve picked up is that the d’Alembert strategy is ideal for minimizing severe swings.

What are the Cons?

The d’Alembert betting system does not overcome the house edge.

Over time, you’ll lose money due to roulette’s house edge. While it is less aggressive than the Martingale system.

A few losing streaks can lead to significant losses. The system requires constant adjustments in bet size.

You can run out of cash if you use a small bankroll because it’s a progressive system.

Finally, it offers a slower recovery of losses compared to other strategies. To that end, it’s more suited for low-stakes roulette players.


We’ve picked up a few things when we used the d’Alembert betting strategy to play roulette.

Though we played it “safe” we still experienced a few glitches or losing spins along the way.

The higher the base unit the more riskier it becomes. Keep your base unit low as that makes bankroll management easier.

Don’t use the d’Alembert betting strategy for more than 100 spins because the tide will turn against you. A bankroll of 1,000 quid only gave us a profit of 10 GBP.

That’s not something to brag about at least we didn’t lose money.

The d’Alembert betting system provides a conservative approach to betting. That makes it less risky than more aggressive strategies like the Martingale.

Neither does it eliminate the house edge, meaning it cannot guarantee long-term profits.

The system requires patience and discipline, as recovery from losses can be slow.

Use it if you prefer a steady and methodical betting style over high-risk, high-reward strategies.

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