Description of the D'Alembert strategy and how to use it when playing roulette.
The D'Alembert strategy is based on the theory of progression and shares many similarities with the Martingale method. However, unlike the latter, this system is much less aggressive. It also involves increasing and decreasing the bet size after positive and negative outcomes. However, the step here is calculated based on an arithmetic progression, rather than a geometric one.
D'Alembert Strategy
According to the D'Alembert system, the user should make predictions on outcomes with equal chances. These are bets that lead to one of two results with a probability close to 50-50. These are bets on red or black, even or odd in roulette. In case of a win, the person receives a payout and either keeps the bet size at the initial level if it was the first one for the session or decreases it by one step. In case of a loss, the bet increases.
Unlike the Martingale strategy, the D'Alembert system does not cover all previous losses with a single successful spin. It may take several spins before the user ends up in the positive. However, this drawback is fully compensated by reduced risks. The arithmetic progression in the D'Alembert method allows for extending the session duration and protecting against variance.
Remember that the D'Alembert Strategy does not guarantee winnings but reduces the casino's mathematical advantage in the short term.
The application of this strategy is only possible when betting on equal chances. If the probabilities of one of the two outcomes are not equal, the system will not work.
Example of using the D'Alembert strategy
Initially, the user sets the starting bet size. This can be done by dividing the deposit amount into several equal parts. For example, into 30 parts. Then they choose an outcome and place a bet on it. If the result is positive, the bet is repeated. In case of a loss, the bet amount is increased by one starting bet.
Let's consider an example. The user replenished their account with $1500. By dividing this amount into 30 equal parts, they determined the size of the initial bet, which was $50. The player's further actions are presented in the table:
Spin Number Bet Amount, $ Result Balance, $
1 50 Win +50
2 50 Loss 0
3 100 Loss -100
4 150 Loss -250
5 200 Win -50
6 150 Win 100
With an equal number of positive and negative outcomes, the user ended up with a profit of two initial bets.
Advantages and Disadvantages of the D'Alembert Strategy
The system is based on an arithmetic progression. The strategy was developed with the assumption that predictions would be made on outcomes with a probability of approximately 50%. However, any gambling game gives the casino a slight advantage. For example, in roulette, the presence of the zero field reduces the chances of red and black to 48.65%. In American roulette, the casino's advantage is 5.25% due to the presence of two zeros on the wheel. This deviation from equal chances can be noticeable in the long run.
Nevertheless, the D'Alembert strategy has several important advantages over other betting systems:
• It requires a smaller deposit amount as it is based on an arithmetic progression.
• For the same reason, the system is considered less risky and allows for longer sessions.
• The impact of variance is reduced compared to systems like Martingale.
• The system is easy to learn, and there are no difficulties in calculating the bet size during its application.
These advantages also lead to some drawbacks. The main one is that after a long losing streak, it may take a lot of time to come out with a profit. Previous losses are not covered by a single successful prediction.
During the application of the D'Alembert strategy, it is important not to succumb to emotions and maintain a sequence of actions. Deviating from the instructions and making incorrect bets even once would require starting the cycle from the beginning.
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