Guide overview
Compare the pocket layouts of common roulette versions and see why a zero pocket changes the probability structure.
The wheel layouts
A standard European wheel has numbered pockets from 1 to 36 and one zero. A standard American wheel adds a double-zero pocket. The table layout and available bets may look similar, but the extra pocket changes the chance of each number on an unbiased spin.
Payout labels are not the whole story
A straight-up number bet typically pays more than an even-money selection, but the return must be considered alongside the probability of the selected outcome. Check the rules for special variants, extra pockets or bonus features rather than assuming a standard wheel.
Systems cannot remove the house edge
Betting patterns such as doubling after a loss do not alter the wheel’s outcome probabilities and can rapidly raise exposure. Learn the pocket layout and rules, set a fixed limit and do not describe a sequence as a way to guarantee recovery.