Die Geschichte von D'Alembert
The D’Alembert strategy was developed by a French mathematician and physicist named Jean-Baptiste Le Rond, known as D’Alembert. This D’Alembert based his method on Martingale and tried to eliminate the disadvantages of Martingale in his own strategy.
D’Alembert lived in the 18th century and had a promising theory. He assumed that results with a 50% distribution of chances always balance each other out at some point and every result occurs equally often in the long term (so you only rely on the simple chances and zero remains out of consideration). His conclusion: If outcome A occurs several times in a row, the chance of B must increase. In roulette this means: the more often a red number appears in a row, the greater the chance of a black number in the next round of the game. After all, in the long run, both results should occur equally often. The assumption is of course completely correct statistically that red comes just as often as black. If you look at a thousand or more games, it is probably exactly the same. On the other hand, if you look at 100 games, there should be considerable deviations upwards and downwards. And when it comes to 10 games, the statistic is absolutely meaningless.