The game of the roulette is not merely controlled by the fate, it is possible to elaborate an infallible gaming strategy which works almost every time: in particular we take into account a technique which allows players to win 9 times out of 10.

The Grand Martingale is a gaming strategy which is really useful for those who play roulette mainly at the casinos. It concerns those bets which originates simple chances.

This gaming strategy took its name from the philosopher and mathematician Jean d’Alembert. It can be applied in the game of roulette and, differently from the classical betting system, this can be applied both when you are winning or losing and allows players to make a balance between the deficits and the winning bets of a match.

The betting system called “Contre d’Alembert” is a game technique that concerns the roulette matches and in particular those matches featured by the simple chances ( which means matches in which the bets are winning one time out of two or in which the bets give a unit for any unit placed).