The D’Alembert system was invented by the 18th century French mathematician Jean-Baptiste le Rond d’Alembert and is perhaps the easiest of all Roulette strategies to apply. As a negative progression system, it involves you placing a bet, adding one unit to it if you lose, or removing a unit from it if you win, i.e. raise when you lose, lower when you win. Predicated on the idea of natural equilibrium, the D’Alembert strategy works best when applied to a set of even wins and losses for the same bet – but of course you won’t know what the Roulette wheel has in store for you until you start to play.
The most frequently sold roulette system by scammers who claim you can’t lose with it. Henry Labouchere discovered the system and named it after himself. Actually it was created by someone else but Henry didn’t care about that. This is the most famous cancellation betting system strategy and is fun to play. This section will explain how to play it and how not to get (too) hurt by playing it.