Betting Strategies for Roulette · Coverage · 7 min

Dozen Strategy and Columns for Roulette

Roulette dozens strategy dey bet two dozen or two columns at once, and e cover 24 out of 37 numbers.

Short answer

E dey win 64.9% of spins for net of +1 unit; e dey lose 2 units for di oda 35.1%. Expected valuemathsExpected valueDi average result for each bet for di long run. −1/37 of di stake for every standard European bet.Read di whole tin →: −2.70% of di two units wey you stake.

e cover
24 / 37
p(win)
64.86%
net when you win
+1 unit
net when you lose
−2 units
For di table · 24 numbers
For di wheel
0321519421225173462713361130823105241633120143192218297281235326

Di arithmetic of di two-dozen roulette strategy

One unitmoniUnitDi base stake wey system or player dey work with. Dem dey describe progressions in units so dat dem go fit work for any table.Read di whole tin → on each of two dozenbetDozen1–12, 13–24 or 25–36, e dey pay 2:1.Read di whole tin →. If any of di two hit, e dey pay 2 and di oda one lose: +1. If e miss (di third dozen or zerowheelZeroDi one green pocket wey no even-money, dozen or column bet dey cover; na im be di source of di house edge. Dem also dey call am: single zero, 0.Read di whole tin →), both lose: −2. (24 × 1 − 13 × 2)/37 = (24 − 26)/37 = −2/37 for each two units wey you stake = −1/37 for each unit. Di same edge as everytin else, different shape: almost two wins out of three, each one worth half of one spin wey lose.

outcomeprobabilityresult (2 units wey you stake)
dozen wey you cover64.86%+1
di third dozen32.43%−2
zero2.70%−2
wetin you go expect for each spin−0.054

Why e dey feel like winning

To win 65% of spins na di highest hit rate wey ordinary bets fit give, apart from di 25-number James Bond spread. Session of two-dozen betting na long gentle sawtooth: up one, up one, down two, up one. Di average slope na −2.70% of turnovermoniTurnoverDi total moni wey you bet for one session or one period, including winnings wey you bet again. Dem also dey call am: handle, action.Read di whole tin →, and becos you dey stake two units for each spin, turnover double compared to one dozen.

Ten two-dozen sessions, $10 on each one ($20 for each spin)result vs where you start
+$800$0−$500+$320−$2500125250375500spinsresult
1,000 sessions × 500 spins · violet p10/p25/p75/p90, light blue median, 82 faint samples · move mouse on top di chart to see quantiles for one spin
  • p10 −$500
  • p25 −$500
  • median −$360
  • p75 +$0
  • p90 +$280
1,000 sessions × 500 spins · we cut di y-axis for 1st–99th percentile (di extremes na −$500 to +$1,320) · 500 spins · $20 base · even-money bet
We approximate am with even-money bet wey get di same expected loss; di real pattern get smaller ups and bigger downs.

James Bond Strategy for Roulette

Progressions for dozens

To double di stake afta loss no dey recover for 2 to 1 bet di way e dey do for even money. Make we say you lose 2 units (one on each dozen), you double am to 2 and 2, and you win: you go collect 4 and lose 2 for di oda dozen, net +2, wey only cover di loss before without anytin extra. To get net +1 afta each loss, you must do pass double, and di standard dozens progressionstrategyProgressionAny rule wey dey change di stake based on di results wey don pass. Negative progressions dey raise am afta losses, positive ones afta wins.Read di whole tin → na to multiply by three: 1, 3, 9, 27, 81. You go reach $500 limit from $5 base afta five losses; (13/37)⁵ ≈ 0.5% for each attempt, with plenty attempts for each session.

stepstake for each dozentotal wey you don stake so farp(to reach dis step)
112100%
23835.1%
392612.3%
427804.3%
5812421.5%
62437280.5%
To multiply by three for dozens dey reach $500 limit from $5 for five steps. Dem go refuse di sixth step.

Rotation and dozens wey dey “sleep”

Plenty systems wey dem dey sell dey rotate which dozen to leave out, usually di one wey hit last or di one wey never hit for some time. Spins no dey depend on each oda, so di choice of which 13 numbers to leave uncovered no get effect on anytin. Di systems na di same as each oda and as to pick di dozen wey you no cover anyhow.

To bet di dozen wey dey “sleep”: di wheel no sabi which one dey rest.

Strategy for roulette columns

Everytin wey dey up dey apply to two columnsbetColumnTwelve numbers for one column of di layout wey stand from up to down, e dey pay 2:1.Read di whole tin →, wey still cover 24 numbers, or to one dozen plus one column, wey cover 20 (four numbers dey count two times). Di Bet Builder tool dey give di exact distribution for any mix.

Bet Builder

Doubling wey slow pass

One pamphlet wey dem dey sell for Las Vegas, Famous Las Vegas Gambling Systems, dey offer gentler progression for column: bet 1 unit, bet 1 again afta loss, and double only afta two losses wey follow each oda, so di stakes go be 1, 1, 2, 2, 4, 4, 8, 8 (Bollman, 2024). Di stakes dey grow half as fast as di ones of MartingalestrategyMartingaleProgression wey dey double di bet afta every loss. Check di Strategy section to see wetin e dey do and wetin e no dey do.Read di whole tin →, and di price na sey win no dey always cover di losses again: win for di second bet of one pair fit leave you level or behind. Ten misses wey follow each oda cost 62 units and dem dey come about once in 50 tries, since column dey miss 25 times in 37. Every unit wey you stake still cost 2.70%.

Questions wey pipo dey ask

Two dozen better pass red?

Higher hit rate, bigger losses, di same expected value. RedbetRedEven-money bet on di 18 red numbers. For French: rouge.Read di whole tin → with di same total stake get lower variancemathsVarianceOne measure of how wide di results dey spread around di expected value. E high for straight up, e low for even-money bets.Read di whole tin →.

Make I cover two dozen and zero?

Add one chipmoniChipToken wey stand for one fixed amount, wey you put on top di layout to make bet. Dem also dey call am: check.Read di whole tin → on zero and you go cover 25 numbers; zero go then pay 35 − 2 = +33 instead of −2. Di expected value go become −3/37 for each three units: e no change for each unit.

Play with Maths

Try dem by yourself first. Each solution dey folded; open am when you ready.

  1. Di columnbetColumnTwelve numbers for one column of di layout wey stand from up to down, e dey pay 2:1.Read di whole tin → system of di pamphlet dey stake 1, 1, 2, 2, 4, 4, 8, 8 unitsmoniUnitDi base stake wey system or player dey work with. Dem dey describe progressions in units so dat dem go fit work for any table.Read di whole tin →, e dey double only afta two losses wey follow each oda, and e dey stop for di first win. Column dey pay 2 to 1. How far ahead or behind you go dey if di first win come for bet 1, 2, 3 … 8?

    Show di solution

    Answer Win for bet 1, 3, 5 or 7 dey leave you 2 units up. Win for bet 2, 4, 6 or 8 dey leave you +1, 0, −2 and −6 units: e no reach di usual +2, and you dey behind from bet 6.

    Win for stake s dey pay 2s; remove everytin wey you lose before am.

    Bet 1 (stake 1): +2. Bet 2 (stake 1, 1 lose before): 2 − 1 = +1. Bet 3 (stake 2, 2 lose): 4 − 2 = +2. Bet 4 (stake 2, 4 lose): 4 − 4 = 0. Bet 5 (stake 4, 6 lose): 8 − 6 = +2. Bet 6 (stake 4, 10 lose): 8 − 10 = −2. Bet 7 (stake 8, 14 lose): 16 − 14 = +2. Bet 8 (stake 8, 22 lose): 16 − 22 = −6.

    Di first stake of each pair dey always net +2; di second dey net +1, 0, −2, −6, −14 and so on, worse every time. Na di price of di slower climb be dat. Column dey miss 25 times for 37, so ten misses wey follow each oda, 62 units wey you lose, dey come about once for 50 tries.

Small laugh

Two dozen: hit rate of 65% with cost of 2.70%.

Two dozen: hit rate of 65% with cost of 2.70%.

Sources

  1. RouletteDoc. Short look at all di roulette strategies. https://roulettedoc.com/strategy
  2. Roulette77. Short look at all di roulette strategies. https://roulette77.us/strategies
  3. Ethier, S. N. The Doctrine of Chances: Probabilistic Aspects of Gambling. Springer, 2010. Chapter 13, wey tok about roulette.
  4. Bollman, M. Basic Gambling Mathematics: The Numbers Behind the Neon, 2nd ed. CRC Press, 2024.
we check am 2026-09-28model: European wheel, single zerohow we work am ↗where we get am ↗