Double and Single Zeros in the Roulette Wheel

Published on 23 September 2013

Roulette Zeros and the Banker’s edge

The “double zero” in the roulette wheel is beleived to be invented in America. This is definitely not true, because the original modern wheels played in France around the 1800 century both have zeros and the Americans simply used that wheel. Apparently in 1842, Frenchmen Francois and Louis Blanc created a new-style wheel with a single zero and the game became quickly popular but both wheels were in existence in France and Europe until the 20th century.

French roulette thas was described at the end of the Victorian era, has both zero and double zero. The zero was colored red and counted as “Pair” and “Manque”, and the double zeron was black and counted as “Impair” and “Passe”.

If the ball lands in any of these numbers, the bank takes the lost bets but if there was a matched it was called Pair, Impair, Rouge, Noir, Passe or Manque, but not won. The bet was kept until the next spin and on that turn, the stake is either lost or if the ball matches the stake, the stake will then be return to the player without any profit.

These two extra numbers are obviously giving the best opportunity to the bank over an extended period of time. However, if the ball lands on one of the zeros two times every 38 balls, there is a 1/38 profit for the bank. The single number bet payos odds of 35 to 1, but because there are 38 pockets that the ball can fall into, the correct odds are in fact 37 to 1. The banker then have 2/37 edge over 5% of all money staked on specific numbers or groups of numb

The Evolution of Zero

In the modern roulette wheel, either online of land-based zeros are not in the color red or black anymore.

In Latin America and Europe, roulette is the most popular game in the casino because the wheels in Monte Carlo, Deauville, San Remo, London and anywhere else in these countries all have single zero, which only means the casino is taking a reasonable cut from the gamblers.

European roulette has two variants, the “En Prison” and the “La partage”. “En Prison” rule was kept from the old game. In this rule, if the ball lands on zero, and your bet was an evens stake, the bet is imprisoned and the result determined on the next spin. If the ball lands on zero two times, the imprisoned bets are lost. While the “La partage” rule is returning half the stake to the gambler when a zero comes out.

In North America and the Caribbean, roulette wheels have a double zero, which was based from the original French games. In this rule, all bets are lost when either zero comes out. This gives the worse odds for the player and increases the house advantage. This is probably why roulette is the third most playerd casino game in the region after Craps and Blackjack.