When people think of mathematicians, they usually think of bankers or rocket scientists. However, they are equally responsible for creating some popular roulette strategies we use! Jean le Rond d’Alembert is one such mathematician, who has devised the popular d’Alembert roulette system.

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The only way to make this system work is to use even-money bets. Since their win rate is close to 50%, it allows you to plan and employ a proper strategy. You can place your money on the following wagers:

Do not expect massive wins using this system. All outside bets pay 1:1, meaning you will see small increases to your budget while winning.

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#### How it Works?

This strategy requires you to set up a unit ahead of time. This unit should not be more than 1% of your total budget. For the sake of simplicity, we will use \$1 as our unit.

Like in Martingale’s system, you increase your bet when you lose a game. However, instead of resetting back to your starting bet, you gradually decrease the wager when winning. In both cases, you always add or remove a single unit.

In order to help you understand the system, we created the following six round example game:

• Round 1: We bet \$1 to start with. We win, so the bet stays the same.
• Round 2: We bet \$1 and lose.
• Round 3: We bet \$2 due to losing the previous round. We lose round 3, too.
• Round 4: We bet \$3 since we lost the previous two rounds. We win this round. This puts us back at even money.
• Round 5: We bet \$2 and win again. We are now \$2 ahead.
• Round 6: We bet \$1 and win. We are now \$3 ahead.
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#### Flaws and Problems

As you can tell, d’Alembert’s system suffers from the same issue as the Martingale – it is weak against losing streaks. However, it is far easier to manage due to all increases and decreases being incremental. Provided you follow our advice about keeping your unit less than 1% of your total budget, you should never run out of money.

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