Tiers du Cylindre for Roulette
“One third of di wheel”: di roulette tiers bet dey cover di twelve pockets wey face zero.

Six splits, six chips, twelve numbers: 27 reach 33 for di wheel. Probability 32.43%, net +12 units for any hit.
Di splits
5-8, 10-11, 13-16, 23-24, 27-30, 33-36. Six chipsmoniChipToken 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 →, each one na splitbetSplitTwo numbers wey dey near each oda, e dey pay 17:1.Read di whole tin → wey dey pay 17 to 1. Di twelve numbers dey run without break round di wheel from 27 reach 33: 27 13 36 11 30 8 23 10 5 24 16 33. You go announce am as “tiers” (tiers du cylindreFR · sectorTiers du cylindre“One third of di wheel”: di twelve numbers wey dey opposite zero, from 27 to 33 for di wheel, wey you bet with six splits.Read di whole tin →, sometimes “series 5/8” for German casinos, afta di first split).
Payout and wetin you fit expect
Any hit dey pay 17 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 → for one split and lose di oda five: net +12 for stake of 6 units. ProbabilitymathsProbabilityDi chance of one outcome, from 0 to 1 or from 0% to 100%. One number: 1/37 = 2.70%.Read di whole tin → 12/37. EV for each spin: (12/37)(12) − (25/37)(6) = (144 − 150)/37 = −6/37, wey be 2.70% of six units. Di same coverage as dozenbetDozen1–12, 13–24 or 25–36, e dey pay 2:1.Read di whole tin →, but for di wheel instead of di layoutequipmentLayoutDi betting grid wey dem print for di table. Dem also dey call am: table, felt, cloth.Read di whole tin →, and with flat payoutmoniPayoutWetin bet wey win dey return, wey dem dey quote as “X to 1” on top di stake wey dem return.Read di whole tin →: every hit dey pay di same.
Tiers versus dozen
Both dey cover twelve numbers for 32.43%. $30 dozen dey pay +$60 if e hit, exactly like six $5 splits. Dem be di same bet for payout and probability; dem different only for which twelve numbers and whether di numbers form one arc. For bias player, dat one na everytin; for system player, e be notin.
Why e dey opposite zero
Di French sectorwheelSectorPockets wey follow each oda for one arc of di wheel, no be group for di layout.Read di whole tin → bets dey cover di wheel like tiles: voisins du zéroFR · sectorVoisins du zéro“Neighbours of zero”: di seventeen numbers from 22 to 25 for di wheel, wey you bet with nine chips.Read di whole tin → dey take di 17 pocketsequipmentPocketOne of di 37 small boxes wey get number for di rotor. Dem also dey call am: slot, cup.Read di whole tin → round 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 →, tiers dey take di 12 wey face am directly, orphelinsFR · sectorOrphelins“Orphans”: di eight numbers wey voisins and tiers leave: 17, 34, 6 and 1, 20, 14, 31, 9.Read di whole tin → dey take di 8 wey remain for two small arcs. Togeda dem cover all di 37 exactly one time. Na for Monte Carlo dem make di three standard, and dem dey print dem for di racetracktableRacetrackDi oval strip for live and electronic layouts wey dey show di numbers for wheel order, wey you dey use to put neighbours and sector bets with one tap.Read di whole tin → of every live table.
For di table
Dealer for physical table dey put six chips inside few seconds and e go repeat di call back (“tiers, cinq pièces” for five units for each). Online, one tap for di racetrack button dey put all di six. Minimums dey work for di total of di call, so six $1 chips go reach $5 inside minimum.
Questions wey pipo dey ask
No. Na di third of di wheel wey far pass from zero.
You fit put di six splits by hand with any weights; di call bettableCall betBet wey you announce give di dealer instead of to put am with your hand, usually bet on one sector of di wheel like voisins or tiers. Dem also dey call am “announced bet”.Read di whole tin → by imself na six chips wey equal.
Small laugh

Twelve pockets, six chips, one third of di wheel.
Sources
- Ethier, S. N. The Doctrine of Chances: Probabilistic Aspects of Gambling.
- Wykes, A. The Complete Illustrated Guide to Gambling.