2/3 System for Roulette
Di 2/3 Roulette System dey watch 28 spins, then e dey cover 16 numbers wey never come out with straight-up chips. Record of spins wey don pass no fit make dat numbers get more chance for di next spin.

Di rule wey dem state dey produce exactly 16 numbers wey never come out only when 21 different pockets don show. With one fixed 16-chip layout, one hit dey give +20 net and one miss −16, for expected lossmathsExpected lossExpected value times di total moni wey you bet; di average amount wey you go lose for one session or one period.Read di whole tin → of 16/37 units for each bet.
Di Watching Rule Wey Dem State
Record 28 results of one European wheel. Di trigger wey dey go round dey need one number wey repeat between spins 26–28 and at most 21 different pocketsequipmentPocketOne of di 37 small boxes wey get number for di rotor. Dem also dey call am: slot, cup.Read di whole tin → for di full record. Dis analysis dey limit di layoutequipmentLayoutDi betting grid wey dem print for di table. Dem also dey call am: table, felt, cloth.Read di whole tin → to exactly 21 different pockets becos di rule no tok wetin to do when e below 21. When exactly 21 different pockets don show, 16 of di 37 pockets never come out, so put one straight-up 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 each of dat 16 numbers for di next spin. Di watching dey show one layout; e no dey predict di next pocket.
One Important Case Wey Nobody Solve
If di different pockets wey show small pass 21, pass 16 numbers go remain wey never come out. Di rule no tok which of dem to leave out, so dat case na choice wey dem no specify, no be permission to quietly choose any 16. So dis analysis dey judge di only layout wey dem specify full: exactly 16 straight-up bets of one chip each.
Payout Table for 16 Fixed Numbers
All di 16 chips dey live for every bet. One straight-up win dey return 36 times im chip including di chip imself, while di oda 15 chips dey lose.
Example Wey We Work Out
Suppose di record get exactly 21 different pockets and 7 repeats, with one repeat for spins 26–28. Di numbers wey remain then na one clear set of 16 numbers. If di next spin na one of dat 16, im 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 → straight-up return na 36 and di net afta all 16 chips na +20. If e be any of di oda 21 pockets, no chip dey return and di result na −16. Di record wey come before no dey change di 16/37 and 21/37 probabilities.
Di Number of Different Pockets No Get Hard Limit
Afta 37 independent spins of one European wheel, di expected number of different pockets na 23.5745. Dat average no be ceiling: di chance to see pass 24 different pockets na 31.2839%. One average of how pockets dey fill dey describe plenty samples; e no dey put maximum on one particular record or make later spins balance for repeats wey come before.
Risk and Expectation
For di fixed layout, di expected net na (16 × 20 − 21 × 16) / 37 = −16/37 units for each bet. Dat one na di usual European 2.70% loss wey dem apply to 16 units 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 →. Di layout fit make +20 result happen more often pass one single straight-up hit, but e also dey risk 16 units anytime no one of di numbers wey e select land. To select cold numbers no dey change di cover or di 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 →.
Questions wey pipo dey ask
No. Each next spin of one European wheel still dey give each pocket probabilitymathsProbabilityDi chance of one outcome, from 0 to 1 or from 0% to 100%. One number: 1/37 = 2.70%.Read di whole tin → of 1/37. One number wey never come out no get any claim wey don gather on di next result.
Di rule wey dem state no tok which of di numbers wey never come out (dem pass 16) to leave out. One complete rule must state dat choice before anybody fit analyse am as fixed layout.
Small laugh

Sixteen numbers wey never come out still dey win 16 spins out of 37, no more.
Sources
- RouletteDoc, Overview of di strategy
- Roulette77, Overview of di strategy