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Bets · Call bet · sector · 6 min

Orphelins

“Orphans”: the eight pockets left over by voisins and tiers.

Short answer

Five chips on eight numbers in two arcs: 17-34-6 and 1-20-14-31-9. ProbabilitymathProbabilityChance of an outcome, from 0 to 1 or 0% to 100%. One number: 1/37 = 2.70%.Read full → 21.62%.

covers
8 / 37
probability
21.62%
chips
5
net on hit
+13 or +31 units
On the table · 8 numbers
On the wheel
0321519421225173462713361130823105241633120143192218297281235326
0321519421225173462713361130823105241633120143192218297281235326Voisins du zéroOrphelinsTiers du cylindreOrphelins
The wheel in three sectors
8 numbers21.62% of the wheel5 chips
In wheel order
1734612014319
How the chips are placed
0123456789101112131415161718192021222324252627282930313233343536
135:16-917:114-1717:117-2017:131-3417:1

The chips

One straight upbetStraight upA single number, pays 35:1.Read full → on 1, and splitsbetSplitTwo adjacent numbers, pays 17:1.Read full → on 6-9, 14-17, 17-20, 31-34. Five chipsmoneyChipA token representing a fixed amount, placed on the layout to make a bet. Also: check.Read full →, eight pocketsequipmentPocketOne of the 37 numbered compartments on the rotor. Also: slot, cup.Read full → in two separate arcs of the wheel: 17 34 6 on one side, 1 20 14 31 9 on the other. Note that 17 appears in two splits, so a hit on 17 pays twice. Announced as “orphelinsFR · sectorOrphelins“Orphans”: the eight numbers left over by voisins and tiers: 17, 34, 6 and 1, 20, 14, 31, 9.Read full →” (orphelins en chevalFR · splitChevalFrench for split: one chip on the line between two numbers, pays 17:1.Read full → when all splits; “orphelins en pleinFR · straight upPleinFrench for straight up: one chip on a single number, pays 35:1.Read full →” is a different, eight-chip, all-straight-up version).

Where the ball goes on orphelins% of spins
this bet wins
21.62%
another number
75.68%
zero
2.70%
% of spins
037.8475.68%

Payout by pocket

A hit on 1 pays 35 and loses four chips: +31. A hit on 17 pays 17 twice and loses three chips: +31. A hit on any of the other six numbers pays 17 and loses four chips: +13. Any miss loses five.

ball lands onpaysother chips lostnet (units)probability
1+354+311/37
17+34 (two splits)3+311/37
6 9 14 20 31 34+174+136/37
any other number05−529/37
EV = (31 + 31 + 6·13 − 29·5)/37 = −5/37 units: 2.70% of five.

Together

Voisins (17) + tiers (12) + orphelins (8) = 37. The three call betstableCall betA bet announced to the dealer rather than placed by hand, usually a wheel-sector bet such as voisins or tiers. Also “announced bet”.Read full → tile the whole wheel exactly once, which is why they are called the three sectorswheelSectorA contiguous arc of pockets on the wheel, as distinct from a group on the layout.Read full → and printed together on the racetracktableRacetrackThe oval strip on live and electronic layouts showing the numbers in wheel order, used to place neighbors and sector bets in one tap.Read full →. Betting all three at once covers every pocket with 20 chips and guarantees a result between −2 and +16 unitsmoneyUnitThe base stake a system or a player works in. Progressions are described in units so they apply at any table.Read full →, with an expected valuemathExpected valueThe average result per bet over the long run. −1/37 of the stake for every standard European bet.Read full → of −20/37: the three bets’ edges simply add.

Roulette TableExpected Value of Call Bets

Why orphans

The name is literal. When Monte Carlo standardized voisins and tiers, eight pockets were left without a family. Nobody designed orphelins; it is what remained.

Monte Carlo Roulette

At the table

“Orphelins, deux pièces” places five $2 chips. On the racetrack a single tap does it. Because the bet mixes a straight up and splits, some RNG interfaces list it under “special bets” rather than sectors.

Live vs RNG Roulette

Questions

Why does 17 pay twice?

It sits in two splits (14-17 and 17-20) because the layoutequipmentLayoutThe printed betting grid on the table. Also: table, felt, cloth.Read full → puts it between two other orphans.

Is orphelins a good bet?

Same 2.70% as everything else. It is the lowest-coverage sector, so the most volatile of the three.

Comic relief

Seventeen plus twelve plus eight is thirty-seven.

Seventeen plus twelve plus eight is thirty-seven.

Sources

  1. Ethier, S. N. The Doctrine of Chances: Probabilistic Aspects of Gambling. Springer, 2010. Chapter 13, roulette.
  2. Wykes, A. The Complete Illustrated Guide to Gambling. Doubleday, 1964.
reviewed 2026-09-28model: European, single zeromethodology ↗sources ↗