There is a way to beat the casino at roulette, but this involves finding an unbalanced wheel, presumably old and rickety, more likely in a smaller casino, or perhaps at a fair where the mechanics of the wheel are far from state of the art.
It is impossible to make a perfectly balanced wheel, one where each number has exactly the same chance of coming up as any other number. A slight imperfection in the material, normal wear and tear, a warp, a tiny tilt, an unlevel floor, a slightly larger or shorter slot - these possibilities or any of a number of others can cause an imbalance of a wheel and favor some numbers to be spun more than others.
Wheels are made with such tremendous precision nowadays that it is extremely unlikely to find a wheel with a bias significant enough to make this theory interesting.
However, you may find an older wheel in use, one that's been subjected to enough wear and tear of normal usage that a bias is created, or one with faulty mechanics, and until the casino has figured out that you've got something going on and shuts down the wheel, you can make a lot of money - with the odds.
First you must determine if the wheel is biased and how large the bias is. To do this requires a lot of work and patience, but if indeed your hunch is right and the wheel is significantly biased, you will have made the effort worthwhile. There are many stories of dedicated players patiently clocking wheels, finding a bias, and winning enormous sums of money until the game is shut down on them.
To properly track a wheel, you'll need a partner or an associate or two for every spin of the wheel will need to be recorded for at least 24 hours and ideally two or three times that much to get a fair sampling. A sampling taken for less than 24 hours will only show short run deviations (unless the wheel is incredibly biased) and will not be an accurate look at numbers which may be biased.
The expectation of any single number being spun is 1 in 38 on an American wheel (1 in 37 on a European one).
For a strategy to be effective and show profits, a single number's bias must not only be greater than the 1/38 (1/37 in Europe) expected result, but be sufficient enough to overcome the inherent casino's edge of 5.26% on an American wheel and 2.70% on a European one for single zero betting.
You may find one number or several that stand out on a wheel as being biased and base your winning strategy on those numbers (or number). The superior odds inherent in single zero roulette make those games much better to track for if a bias is found, the smaller house edge is easier to overcome and the profits will be greater.
Roulette Wheel
Roulette works similar to a spinning wheel. The wheel we use in US (American roulette)is comprised of 38 slots, each numbered individually:
0, 00, 1, 2, 3, - all the way to and including 36.
European Roulette wheel is similar, however does not have the 00 in its wheel. Each section of the wheel is hollow, which makes it easy for the spinning ball to "fall" into a target area. The numbers alternate between pairs of even and pairs of odds, in the same way that they alternate between red and black colours on the numbers.
The only 2 numbers in American Roulette who are not part of this equation are 0 and 00 - as they are coloured green. Here is how it works.
The dealer spins the wheel in 1 direction, while rolling the ball around the wheel in the opposite direction.
It is by stroke of luck that the ball will roll into any particular number. Unfortunately for all of us there are no mathematics involved.
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