Roulette lab · Lab · Method · 7 minute

Analysis a di sector dem

Physical defect affec pocket weh deh side by side all togedda, suh test arc a di wheel, nuh jus single numba.

Short ansa

Group di 37 pocket inna sector weh run side by side, an compare di hit yuh see wid wah yuh expec inna each sector. A real bias usually show up as one or two sector next to one anodda weh run hot cross independent sample.

usual sector dem
6 arc a 6–7
statistic
z fi each sector
fi confirm
a second sample
wah mek
defect a physical, physical a local

Di method

Divide di wheel inna sectorpon di wheelSectorA piece a di wheel weh di pocket dem follow one anodda roun di arc, nuh a group pon di betting layout.Read di whole ting → weh run side by side, usually six arc a six or seven pocketgearPocketOne a di 37 compartment wid numba pon di rotor. Nex name: slot, cup.Read di whole ting →, an follow di wheel order, nuh di betting layoutgearBetting layoutDi bettin grid weh print pon di table. Nex name: table, felt, cloth.Read di whole ting →. Fi each sector a k pocket, di hit yuh expec a n·k/37 an di standard deviationmathsStandard deviationDi square root a variance; ow far a result usually deh fram di expected value.Read di whole ting → a √(n·p·(1−p)) wid p = k/37. Work out z = (observed − expected)/σ fi each sector. A sector ova +2 worth a second look; ova +3, inna two independent sample, it interestin.

sector (inna wheel order)pocketkexpec inna 3,000 spinσ
A0 32 15 19 4 21648620.2
B2 25 17 34 6 27648620.2
C13 36 11 30 8 23648620.2
D10 5 24 16 33 1648620.2
E20 14 31 9 22 18648620.2
F29 7 28 12 35 3 26756821.5
One common way fi split it. Decide it bifo yuh look pon di data; if yuh shif di border dem afta, dat a multiple-comparisons problem.

Di roulette wheel

Wah mek sector

Single-pocket test have 37 chance fi throw a false positive, an a weak signal inna each one. Sector test have six chance an a signal weh add up cross pocket weh deh side by side. Dem match di physics too: a wheel weh tilt mek di ballgearBallDi likkle ball weh di dealer fling roun di track di opposite way to di rotor. Modern ball mek outta ivorine or Teflon, 18–21 mm.Read di whole ting → lef di track more pon di high side, an dat favour a arc; a fretgearFretDi metal divider between two pocket pon di wheel (di likkle wall between pocket).Read di whole ting → weh loose or bend change di bounce fi di pocket dem beside it; a ball trackgearBall trackDi groove inna di rim weh di ball run roun bifo it slow dung an drop. Nex name: upper track.Read di whole ting → weh wear dung mek a drop zone weh favour whichever pocket deh unda it at di drop, an wid a rotorgearRotorDi part a di wheel weh spin an carry di pocket dem.Read di whole ting → speed weh change slow, dat spread cross a wide arc. None a dem defect yah nuh favour one single pocket by itself.

Sector hit, 3,000 spin (simulate, fair wheel)z score
A
+0.4
B
−1.1
C
+1.6
D
−0.3
E
+0.8
F
−1.4
z score
01.503
Di bar length show |z| gainst a ceilin a 3. All a dem inside di noise. A real sector bias woulda put one bar ova 3 inna two separate sample.

Speed a di roulette rotorPhysics a di roulette wheel

Rollin sector

Fix border can split a hot arc between two sector an water it dung. Anodda way weh go wid it slide a window a k pocket roun di wheel, work out z at each a di 37 position, an look fi di highest one. Di highest a 37 z-score weh link togedda, pon a fair wheel, usually roun 2.2 to 2.5, suh a rollin-window maximum unda 2.5 a noise, an di level weh start get interestin higher too, roun 3.5.

Fram sector to bet

If a sector confirm hot, di natural bet a neighbour dembet demNeighboursA numba an di two pocket pon evry side a it pon di wheel, five straight-up chip.Read di whole ting → pon it centre, or a set a straight upbet demStraight upOne single numba, pay 35:1.Read di whole ting → weh yuh put dung by hand cross it. Di profit test a di sector hit rate gainst di payoutmoney mattaPayoutWah a bet weh win gi yuh back, weh dem quote as “X to 1” on top a di stake weh come back.Read di whole ting →: a six-pocket sector haffi hit more dan 6/36 = 16.7% a di time (observe, an repeat) fi six straight-up chipmoney mattaChipA token weh stand fi a fix amount, weh yuh put pon di betting layout fi mek a bet. Nex name: check.Read di whole ting → fi break even, gainst a fair 16.2%. Di margin a half a percentage point, an dat a wah mek it tek tens a tousands a spin fi confirm it.

Ow big di sample size fi be

Di analyzer

Di Wheel Bias Analyzer pon dis site tek a list a spin, work out di chi-square, an show di wheel as a heat map wid sector z-score, wid di split up top as di default. It also shuffle yuh data fi show wah di same statistics look like pon a fair wheel, an dat a di quickest cure fi seein pattern.

Di chi-square test

Formula

E(sector) = n·k/37
σ = √(n·p·(1−p)), p = k/37
z = (O − E)/σ

Question dem

Ow much sector mi fi use?

Six a di standard. Less lose resolution; more lose power. Decide bifo time.

Wah if two sector next to one anodda both high?

Join dem an work out z fi di whole arc. A real defect often sidung pon a border.

Di betting layout matta?

No. Sector a arc pon di wheel. Dozenbet demDozen1–12, 13–24 or 25–36, pay 2:1.Read di whole ting → an columnbet demColumnTwelve numba inna one column weh go up an dung pon di betting layout, pay 2:1.Read di whole ting → a nuh sector.

Sumting fi laugh

Defect a physical. Physical a local. Test arc.

Defect a physical. Physical a local. Test arc.

Source dem

  1. Barnhart, R. T. Beating the Wheel. Lyle Stuart, 1992.
  2. Pearson, K. “On the criterion that a given system of deviations from the probable…” Philosophical Magazine 50(302), 1900.
wi check it 2026-09-28model: European wheel, single zeroow wi work it out ↗source dem ↗