Jean le Rond d’Alembert was a mathematician from France, who argued that that the probability of a coin landing heads increased for every time that it came up tails.
The D’Alembert System is in a family of systems called The Progressions Systems.
D´Alembert is most usefully employed on even money bets on the roulette table, be that online or at a landbased casino.
Theoretically over the course of 20 spins you might see 20 reds which exposes the key flaw in this system despite what D’Alembert thought a run of 20 reds is perfectly possible. The roulette wheel has no memory, whether it is a virtual roulette wheel or a wheel at Las Vegas, Monte Carlo or Macau. Each spin is a mutually exclusive event and there is a 50/50 chance on each spin that you will get either colour.
You place a USD10 bet on High numbers and you lose, add a unit on the following bet . If you win on the next bet, take your next punt down by a unit again, so you are back down to USD10. Continue in this fashion until you have hit your profit target or you get down to a bet of zero.
