Roulette with Two Balls
Two balls for one wheel. Inside betsbetInside betAny bet wey you put on top or between di numbers of di grid: straight up, split, street, corner, six line.Read di whole tin → need one ball; outside bets need both.
For double-ball roulette, dem dey fire two balls togeda and dem dey land separately, so once in a while dem dey share one pocket. Inside bets dey win if any of di balls hit, for half of di normal payout, and dem dey pay double if both hit. Outside bets dey win only if both balls agree, and dat one make dem cost double pass for table wey get one ball. Jackpot bet dey pay if both balls land for your number.
Inside bets
Your straight upbetStraight upOne single number, e dey pay 35:1.Read di whole tin → dey win if any ballequipmentBallDi small ball wey dem dey throw for di track against di rotor. Modern balls na ivorine or Teflon, 18–21 mm.Read di whole tin → land for am and e dey pay 17 to 1 for each ball wey land, so 34 to 1 if both land. For single-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 → wheel, one ball dey land for your number for 72 out of 1,369 pairs wey get equal chance, and both balls for 1. Di bet dey win 72 × 17 + 34 = 1,258 and lose 1,296, net loss of 38 for 1,369: edge of 2.78%, small above 2.70%. If dem pay 35 to 1 when both balls hit, e go come back to exactly 2.70%. Di payoutsmoniPayoutWetin bet wey win dey return, wey dem dey quote as “X to 1” on top di stake wey dem return.Read di whole tin → wey dem cut into half dey run down di inside table. Di cornerbetCornerFour numbers wey share one corner for di layout, e dey pay 8:1.Read di whole tin → na di trap: for 3 to 1 e dey cost 14.7%, where fair price go be about 3.7 to 1.
Outside bets
RedbetRedEven-money bet on di 18 red numbers. For French: rouge.Read di whole tin → need both balls to be red: (18/37)² = 23.7%, wey dem dey pay 3 to 1. Di bet dey return 4 × 23.7% = 94.7% of di stake, edge of 5.33%, double di European figure. DozenbetDozen1–12, 13–24 or 25–36, e dey pay 2:1.Read di whole tin → need both balls inside am, (12/37)² = 10.5%, and e dey pay 8 to 1: 5.33% again. Na so too for di bet sey one ball go land red and di oda blackbetBlackEven-money bet for di 18 black numbers. For French: noir.Read di whole tin →, for even money. All three dey cost 1 − (36/37)² = 5.33%, di price of bet wey must pass di zero two times.
Where you go find am
Dem show di game for di Global Gaming Expo for 2013 and dem deal am for di Tropicana for Las Vegas from 2014 for double-zero wheel. There, red dey cost 10.25% and di 1,200 to 1 jackpot dey cost 16.83%. Live studios dey run single-zero versions and dem dey pay 1,300 to 1 for di jackpot. Dem dey fire di balls from tube with compressed air, one small moment apart; di tests of di company wey make am see sey dem dey share one pocketequipmentPocketOne of di 37 small boxes wey get number for di rotor. Dem also dey call am: slot, cup.Read di whole tin → about as often as chance predict.
How to play am, if you must
Straight ups and splitsbetSplitTwo numbers wey dey near each oda, e dey pay 17:1.Read di whole tin →, wey dey under 3%, na di honest part. Outside betsbetOutside betBet on di boxes wey surround di grid: dozens, columns and even-money bets.Read di whole tin → dey cost double of European table. Corners for 3 to 1 dey cost pass any bet for American wheel. Di jackpot bet na lottery ticket wey im price depend on di table: 4.97% for 1,300 to 1, 12.27% for 1,200.
Questions wey pipo dey ask
Yes. Dem dey land separately, so both for one pocket dey happen one time for 37 spins for average, and both for pocket wey you choose one time for 1,369. Na wetin di jackpot bet dey pay for be dat.
Becos 3.22 to 1 na di fair payout for chance of 23.7%, and di house dey keep di difference, 5.33% of di stake.
Fair go be 1,368 to 1. For 1,300 e dey cost 4.97%, e cheap small pass red for di same table; for 1,200 e dey cost 12.27%.
Play with Maths
Try dem by yourself first. Each solution dey folded; open am when you ready.
For double-ballequipmentBallDi small ball wey dem dey throw for di track against di rotor. Modern balls na ivorine or Teflon, 18–21 mm.Read di whole tin → roulette for single-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 → wheel, redbetRedEven-money bet on di 18 red numbers. For French: rouge.Read di whole tin → need both balls to be red and e dey pay 3 to 1, dozenbetDozen1–12, 13–24 or 25–36, e dey pay 2:1.Read di whole tin → need both balls inside am and e dey pay 8 to 1, and bet on one red and one blackbetBlackEven-money bet for di 18 black numbers. For French: noir.Read di whole tin → dey pay even money. Why all three dey cost exactly 5.33%?
Show di solution
Answer Each one dey return $1,296 for every $1,369 wey you stake: di price to pass di zero two times.
Two balls for 37 pocketsequipmentPocketOne of di 37 small boxes wey get number for di rotor. Dem also dey call am: slot, cup.Read di whole tin → dey make 37 × 37 = 1,369 pairs wey get equal chance.
Red for both balls: 18 × 18 = 324 pairs. $1 wey win for 3 to 1 dey bring back $4, so di bet dey return 324 × 4 = 1,296.
Dozen: 12 × 12 = 144 pairs for 8 to 1, wey dey bring back $9: 144 × 9 = 1,296.
One red and one black: 18 × 18 pairs for each way, 648 in all, for even money, wey dey bring back $2: 648 × 2 = 1,296.
Each bet dey get back $1,296 for $1,369 wey you stake. Di loss na 73/1,369 = 5.33%. And 1,296 = 36 × 36: dem set every 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 → as if both balls must miss di zero, wey be 1 − (36/37)². For double-zero wheel, di same sum dey give 1 − (36/38)² = 10.25%.
Straight upbetStraight upOne single number, e dey pay 35:1.Read di whole tin → for di double-ball table dey pay 17 to 1 for each ball wey land on your number, so 34 to 1 if both land. How much e dey cost for single-zero wheel, and wetin go bring am back to 2.70%?
Show di solution
Answer 2.78%. To pay 35 to 1 when both balls hit go make am exactly 2.70%.
Out of di 1,369 pairs, your number dey only for di first ball for 36, only for di second ball for 36, for both for 1, and for no one of dem for 36 × 36 = 1,296.
One ball: 72 pairs for +17, so +1,224. Both balls: 1 pair for +34. No ball: 1,296 pairs for −1. Total: 1,224 + 34 − 1,296 = −38, edge of 38/1,369 = 2.78%.
If di double hit pay 35 to 1, di total go be −37, and 37/1,369 = 1/37 = 2.70%, di European price. Di house dey keep one extra 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 → for 1,369.
Small laugh
Inside bets dey honest; outside bets dey double di price.
Sources
- Wizard of Odds. “Double Ball Roulette.”
- Ethier, S. N. The Doctrine of Chances: Probabilistic Aspects of Gambling.