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Roulette Betting Strategies · Spread bet · 6 min

666 Roulette System

The 666 roulette system stakes 66 units to make six on most covered outcomes. It cannot make the house edgemathHouse edgeThe share of each stake the casino keeps on average: 2.70% in European roulette.Read full → disappear.

Short answer

Its 33 covered European pocketsequipmentPocketOne of the 37 numbered compartments on the rotor. Also: slot, cup.Read full → produce +6, but four uncovered pockets lose 66.

stake
66 units
covered pockets
33 / 37
covered net
+6 units
miss
−66 units

Rule as described

The 666 layoutequipmentLayoutThe printed betting grid on the table. Also: table, felt, cloth.Read full → puts 36 unitsmoneyUnitThe base stake a system or a player works in. Progressions are described in units so they apply at any table.Read full → on redbetRedEven-money bet on the 18 red numbers. French: rouge.Read full →, 4 units on each of splitsbetSplitTwo adjacent numbers, pays 17:1.Read full → 0/2, 8/11, 10/13, 17/20, 26/29 and 28/31, and 2 units on straight-ups 4, 6 and 33. These simultaneous bets total 66 units.

Payout table

Using standard European inside and even-money payoutsmoneyPayoutWhat a winning bet returns, quoted as “X to 1” on top of the returned stake.Read full →, the placements give the following net outcomes.

outcome grouppocketsnet
covered by the stated layout33+6
not covered4−66
all outcomes37stake: 66
The listed placements cover 33 distinct pockets.

Worked example

If 11 lands, its 4-unit split returns 72 including that winning stake. Subtract the entire 66-unit layout to get +6; the losing components account for 62 of the units staked. If an uncovered number lands, no component returns and the net is −66. The appealing pattern is therefore many small positive spins against an occasional eleven-times-larger loss.

Cost and risk

The positive-result chance is 33/37 = 89.189%, not a guarantee. Expected valuemathExpected valueThe average result per bet over the long run. −1/37 of the stake for every standard European bet.Read full → is (33 × 6 − 4 × 66) / 37 = −66/37 units per spin. A player needs enough table limittableTable limitMinimum and maximum bet allowed. The maximum is what stops doubling progressions.Read full → and bankrollmoneyBankrollThe total amount set aside for play. Bankroll management is deciding how much of it to risk per bet and per session.Read full → merely to place the opening layout; neither changes the result per unit wagered. It is especially important not to mistake “almost every number is covered” for “almost every spin earns money” in a different layout.

Questions

Are Shauna and Shaun separate systems?

Those names are also used for this 66-unit layout family. Check the exact placements rather than assuming a different name means different coverage or a different house edge.

Does the name mean there are six winning outcomes?

No. Here it refers to a 66-unit total stake and a +6 result on covered outcomes.

Why is the expected loss large?

Because 66 units are exposed each spin. Standard European roulettevariantEuropean rouletteSingle-zero wheel, 37 pockets, house edge 2.70%. The canonical model on this site.Read full → has an expected lossmathExpected lossExpected value times total amount wagered; the average amount lost over a session or a period.Read full → of one unit per 37 units staked.

Sources

  1. RouletteDoc, “666 system” — exact listed placements https://roulettedoc.com/strategy/666-system
  2. Roulette77. Strategy description and examples. https://roulette77.us/strategies/666
  3. Roulette77. Shauna / Shaun system variant. https://roulette77.us/strategies/shaun
  4. RouletteUK, “666 system” — matching family with an alternative three-number selection https://rouletteuk.co.uk/strategies/666-system/
  5. Wizard of Odds, Roulette Basics — straight, split, and even-money payouts https://wizardofodds.com/games/roulette/basics/
  6. Wizard of Odds, The Truth about Betting Systems https://wizardofodds.com/gambling/betting-systems/
reviewed 2026-09-28model: European, single zeromethodology ↗sources ↗