Dozens And Columns
A structured outside-bet approach using one or two dozens or columns.
- Roulette type
- European, French, and American roulette
- Bet focus
- 2:1 outside bets on dozens or columns
How The Strategy Works
This guide expands the short strategy summary into a practical simulator workflow. Use it to understand the betting sequence, bankroll pressure, and failure points before risking real money.
The exact numbers can be changed, but the test should keep one fixed base unit, one roulette variant, and one stopping rule so the result remains readable.
Practical Betting Example
- 1Choose one clear bet type and one base unit.
- 2Run the first spin with the planned stake.
- 3Apply the strategy rule after a win or loss.
- 4Reset, reduce, or stop exactly where the rule says.
- 5Record the result before starting the next cycle.
Bankroll And Risk Rules
- Set a maximum session loss before the first spin.
- Track maximum drawdown, maximum stake, and total cost per cycle.
- Compare European, French, and American roulette separately.
- Never judge the system from a small lucky sample.
Common Mistakes
- Changing the rule after emotional wins or losses.
- Ignoring zero and double-zero outcomes.
- Tracking hit rate without tracking net profit.
- Increasing the base unit before the strategy is tested over a long sample.
Simulator Checklist
- Run at least 500 simulated spins.
- Repeat the same test with a different roulette variant.
- Write down the largest losing streak and largest stake.
- Compare the result with flat betting.
Key Features
- One dozen covers 12 numbers.
- Two dozens cover 24 numbers.
- Payout is 2:1 on a single winning dozen or column.
How This Strategy Was Created
Dozens and columns are part of the standard roulette layout; the strategy came from using built-in 2:1 bets as a disciplined framework.
Why This Option Is Useful
It is good for learning coverage because it balances frequency and payout more clearly than single-number bets.
How To Test It In The Simulator
- Test one-dozen flat betting.
- Test two-dozen coverage.
- Compare hit rate and net return.
Important Risk Note
No roulette strategy removes the house edge. Use this page for education, bankroll planning, and simulated testing only.
Choose An Online Roulette Simulator
Choose the roulette model you want to test with this strategy.
European Roulette
EuropeanSingle-zero wheel for lower house edge testing and clean baseline simulations.
- House edge
- 2.70%
- Numbers count
- 37
American Roulette
AmericanDouble-zero model for comparing volatility, drawdown, and bankroll pressure.
- House edge
- 5.26%
- Numbers count
- 38
French Roulette
FrenchSingle-zero rules with La Partage context for even-money strategy analysis.
- House edge
- 1.35%*
- Numbers count
- 37
What To Test Next
Related Reading
Jun 27, 2026 / 4 min read
Cold numbers and the gambler's fallacy in roulette
A cold number has not appeared for a while, but that does not make it due. Roulette spins are independent in a fair simulator and in a properly working casino wheel. The ...
Read full storyJun 27, 2026 / 4 min read
Why table limits break roulette progression systems
Progression systems often look clean on paper because the next stake is always available. Real tables have maximum limits, and bankrolls have emotional limits. In a simul...
Read full storyJun 27, 2026 / 4 min read
Short sessions can mislead roulette strategy tests
A strategy can look brilliant over 30 spins and weak over 3,000. That is variance. When testing roulette systems, the sample length should match the claim. If a method pr...
Read full story