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Step 1
Assume for a moment that you have just won a spin on the roulette wheel. On your next spin, you are less likely to win again, so you bet less. This is the thinking you use when you apply the D'Alembert system of roulette.
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Step 2
Notice the glaring mistake in logic of the D'Alembert system? If you do, then you can immediately see why this system will not help you overcome the house advantage.
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Step 3
Think about it for a second if you don't see the fault right away. The system assumes that if you win, the probability of winning on your next spin is less so you should bet less. However, the probability that you will win on your next spin is exactly the same, it is not less.
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Step 4
Know that each and every spin of the wheel is an independent event. The outcome of any spin on a roulette wheel has no relation to the outcome that came before or the outcome that will occur on the next spin.
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Step 5
Imagine flipping a coin. If you get heads on one flip, you are equally likely to get heads on the next. There is always a 50/50 chance. The coin could land on heads 10,000 times in a row before you get a tails, or it could alternate with every flip.
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Step 6
Realize that the use of the D'Alembert system for roulette to hedge against losses is also faulty. The system says that if you lose you are therefore less likely to lose on your next spin so you should bet more. Again, the chances of you losing on each spin remain constant, just as the chances of you winning any individual spin do not change.
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Step 7
Search Amazon.com for the book "The Infallible Roulette System" by Don Young and see if you agree (see Resources below).
