- A reference guide and manual in Russian for Heroes 3.

I know many ways not to lose at roulette, but none of them are correct... :D Roulette is a game with negative mathematical expectation and by definition—a losing one. Obviously, you can bet on the same number three times and guess it—but that's probability theory, not a system. All systems are doomed to failure.

And the casino's only income is Zero.

Actually, such a possibility really exists—the possibility of beating the casino, and probability theory has nothing to do with it :)
The methodology I am talking about doesn't give 99 or 60%, it gives 100% success!!! Only there is one, but VERY HUGE MINUS—you'll be kicked out of the gambling establishment immediately, in the best case scenario :)
So it's better not to venture there with it, although you can mess with your friends, if such an opportunity exists, of course...;)