One way to squeeze the casino is to play a European-style single-zero wheel. This cuts the house edge from 5.26 percent down to 2.7 percent. That’s a considerable chunk.
Happily, you don’t have to visit Monte Carlo to play a European wheel. Many American casinos and gambling websites have them. But sometimes it’s with a catch. The European wheel will have a higher table minimum than a double-zero version at the same casino. No problem if you were planning to risk the extra money, but don’t play for higher stakes just to get a lower house edge.
Some American casinos (primarily those in Atlantic City) offer a modified version of the European rule en prison; it’s called surrender. When surrender is allowed, a 1:1 bet that loses to zero or double-zero is only half-lost. You can leave the bet on the layout and hope for a push or take half back. Surrender cuts the house edge on 1:1 bets down to 2.63%.
As I mentioned previously, en prison on a European wheel drops the house edge on 1:1 bets down to 1.35%. The extra spin is mandatory in Europe, which is why they say “en prison.”
A five-number bet (zero, double-zero, one, two, and three) is available only on American wheels. The house edge is a hefty 7.89%. It’s a bad bet; don’t make it. If you truly have a vision that one of those numbers will win, then bet it straight up or make a street or split bet. That will cut the house edge by more than two percent and will return between two to six times more than a five-number bet.
[Additional optimal strategies for roulette including strategies for detecting wheel bias and dealer signature can be found in Basil Nestor’s book The Unofficial Guide to Casino Gambling.]
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