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Last Updated: January 14, 2022

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Double Bonus Spin Roulette

Introduction

Double Bonus Spin Roulette is a roulette variation by IGT. It features a bonus space on the wheel, which may be bet on and gives any other bet two chances to win. This bonus space is 50% wider than all other spaces, giving it a 50% higher chance of winning than any other space.

Rules

  1. The game is played on a wheel with 39 spaces — the traditional 38 spaces in double-zero roulette and a Bonus space.
  2. The bonus space is 50% wider than all other spaces, thus giving it a 50% greater chance of winning than all other individual spaces.
  3. If the ball does not land in the Bonus space, then all bets other than the Bonus bet will pay the standard roulette odds (see table below) and the Bonus bet will lose.
  4. If the ball lands in the Bonus space, then the game shall play a Bonus Spin.
  5. The Bonus Spin is played on two concentric wheels that are numbered the same way as the wheel used on the initial spin. Where the ball lands in the inner wheel shall determine one winning outcome. Where the outer wheel stops directly above the ball will determine a second winning outcome.
  6. For any bet other than the Bonus Spin bet, if the ball lands in the Bonus space, then the player shall get two opportunities to win, one for each wheel in the Bonus Spin. If the player wins on both wheels, then he shall win twice as much as for winning on one wheel. The bets, bet amounts, and pay table shall be the same as for the initiating spin. If the player wins on at least one of the wheels in a Bonus Spin, then he shall get his original bet back. If the outcome of either wheel is a zero, then it shall count as a loss.
  7. If the player bets on the Bonus and the ball lands in the Bonus space, then the player shall immediately receive an instant win equal to 11 times his bet. Then, the player shall go onto the Bonus Spin. If the Bonus Spin results in one Bonus wheel landing on the Bonus spot, the player shall win 120 to 1. If the Bonus Spin results in both Bonus wheels landing in the bonus spot, the player shall win 1200 to 1. The win from the Bonus Spin, not counting the instant win, shall be carried to the win for the original spin. That win shall also be paid on a "to one" basis (yes, I know this is getting confusing), except if the win is for the base win only. Here is the bottom line to how much the player wins on a Bonus bet according to the number of wheels in the Bonus Spin, that land in the Bonus spot. These wins are on a "to one" basis.
    • Two wins: 1200+11+1 = 1212
    • One win: 120+11+1 = 132
    • Zero wins: 11
  8. If the player bets on a split bet between the 0 or 00 and the Bonus and the ball lands in that chosen zero, the player shall be paid 17 to 1, as is standard for a split (two-number bet). If the ball lands in the Bonus space, then the player shall immediately receive an instant win equal to 5 times his bet. Then, the player shall go onto the Bonus Spin. If the Bonus Spin results in one Bonus wheel landing on the Bonus spot, the player shall win 60 to 1. If the Bonus Spin results in both Bonus wheels landing in the bonus spot, the player shall win 600 to 1. In addition, if either Bonus wheel lands in the chosen zero, the player shall win an additional 17 units for each wheel that lands in the chosen zero. The win from the Bonus Spin, not counting the instant win, but counting any wins for the chosen zero, shall be carried to the win for the original spin. That win shall also be paid on a "to one" basis (yes, I know this is getting even more confusing), except if the win is for the base win only. Here is the bottom line to how much the player wins, according to how the Bonus wheel land. These wins are on a "to one" basis.
    • Two Bonus spot wins: 600+5+1 = 606
    • One Bonus spot and one chosen zero: 60+17+5+1 = 83
    • Two chosen zeros: 5+2*17+1 = 40
    • One Bonus spot: 5+60+1 = 66
    • One chosen green: 5+17+1= 23
    • Both wheels lose: 5
  9. If the player bets on a three-way bet between the 0, 00, and the Bonus and the ball lands in that either zero, the player shall be paid 11 to 1, as is standard for a street (three-number) bet. If the ball lands in the Bonus space, then the player shall immediately receive an instant win equal to 3 times his bet. Then, the player shall go onto the Bonus Spin. If the Bonus Spin results in one Bonus wheel landing on the Bonus spot, the player shall win 40 to 1. If the Bonus Spin results in both Bonus wheels landing in the bonus spot, the player shall win 400 to 1. In addition, if either Bonus wheel lands in the chosen zero, the player shall win an additional 11 units for each wheel that lands in the chosen zero. The win from the Bonus Spin, not counting the instant win, but counting any wins for the zeros, shall be carried to the win for the original spin. That win shall also be paid on a "to one" basis (my head is spinning), except if the win is for the base win only. Here is the bottom line to how much the player wins, according to where the Bonus wheels land. These wins are on a "to one" basis.
    • Two Bonus spot wins: 400+3+1 = 404
    • One Bonus spots and one zero: 40+11+3+1 = 55
    • Two greens: 11+11+3+1 = 26
    • One Bonus spot: 40+3+1 = 44
    • One zero: 11+3+1 = 15
    • Two losses: 3

The following table shows the Bonus spin bets for bet that include the Bonus spot. I converted the base win to a "to one" basis. The help screens list them on a "for one" basis.

Bonus Bet Pay Table

Bet Base Win One Win in Bonus Spin Two Wins in Bonus Spin
Bonus Only 11 120 1200
Bonus and One Green 5 60 600
Bonus and Two Greens 3 40 400

Example

double double spin roulette 1

In the image above I bet $1 each on red, 1 to 18, and the Bonus.

double double spin roulette 2

The ball then lands in the Bonus space and the wheel is replaced by the Bonus wheel, consisting of two concentric wheels.

double double spin roulette 3

The winning outcomes of the Bonus Spin are black 26 and red 36. The player is paid 11 to 1 as the base win for the Bonus bet. One of the two bonus spins lands in red, so the player is paid 1 to 1 for the bet on red. In video formats of casino games, the return of the original bet is usually called a "win." Thus the player gets back $11 for the base win, $1 as the win on red, and $2 back for the original wagers on the Bonus and red bets, for a total of $14.

Analysis

The first set of tables are for bets that do not involve a partial or complete bet on the Bonus space. The first two rows in each table are for immediate wins and losses that don't involve a Bonus spin. The rest of the lines break down the possible wins and losses through the Bonus spin.

The following table is for bets on an individual number. The lower right cell shows a house edge of 1.94%.

Single Number Bet Analysis

Event Pays Probability Return
Win 35 0.025316 0.886076
Lose -1 0.936709 -0.936709
Bonus & 2 wins 70 0.000024 0.001704
Bonus & 1 win 35 0.001874 0.065593
Bonus & 0 wins -1 0.036076 -0.036076
Total   1.000000 -0.019412

The following table is for two-number bets, also known as a split bet. The lower right cell shows a house edge of 1.95%.

Split Bet Analysis

Event Pays Probability Return
Win 17 0.050633 0.860759
Lose -1 0.911392 -0.911392
Bonus & 2 wins 34 0.000097 0.003310
Bonus & 1 win 17 0.003651 0.062064
Bonus & 0 wins -1 0.034227 -0.034227
Total   1.000000 -0.019485

The following table is for three-number bets, also known as a street bet. The lower right cell shows a house edge of 1.96%.

Street Bet Analysis

Event Pays Probability Return
Win 11 0.075949 0.835443
Lose -1 0.886076 -0.886076
Bonus & 2 wins 22 0.000219 0.004819
Bonus & 1 win 11 0.005330 0.058632
Bonus & 0 wins -1 0.032425 -0.032425
Total   1.000000 -0.019607

The following table is for four-number bets, also known as a corner bet. The lower right cell shows a house edge of 1.98%.

Corner Bet Analysis

Event Pays Probability Return
Win 8 0.101266 0.810127
Lose -1 0.860759 -0.860759
Bonus & 2 wins 16 0.000389 0.006231
Bonus & 1 win 8 0.006912 0.055298
Bonus & 0 wins -1 0.030673 -0.030673
Total   1.000000 -0.019777

The following table is for the five-number bet on 0-00-1-2-3. The lower right cell shows a house edge of 4.72%.

Street Bet Analysis

Event Pays Probability Return
Win 6 0.126582 0.759494
Lose -1 0.835443 -0.835443
Bonus & 2 wins 12 0.000608 0.007302
Bonus & 1 win 6 0.008397 0.050381
Bonus & 0 wins -1 0.028969 -0.028969
Total   1.000000 -0.047236

The following table is for six-number bets, also known as double street bet. The lower right cell shows a house edge of 2.03%.

Double Street Bet Analysis

Event Pays Probability Return
Win 5 0.151899 0.759494
Lose -1 0.810127 -0.810127
Bonus & 2 wins 10 0.000876 0.008762
Bonus & 1 win 5 0.009784 0.048921
Bonus & 0 wins -1 0.027314 -0.027314
Total   1.000000 -0.020264

The following table is for column bets. The lower right cell shows a house edge of 2.29%.

Column Bet Analysis

Event Pays Probability Return
Win 2 0.303797 0.607595
Lose -1 0.658228 -0.658228
Bonus & 2 wins 4 0.003505 0.014019
Bonus & 1 win 2 0.016064 0.032127
Bonus & 0 wins -1 0.018406 -0.018406
Total   1.000000 -0.022893

The following table is for all even money bets. The lower right cell shows a house edge of 2.73%.

Even Money Bet Analysis

Event Pays Probability Return
Win 1 0.455696 0.455696
Lose -1 0.506329 -0.506329
Bonus & 2 wins 2 0.007886 0.015772
Bonus & 1 win 1 0.018838 0.018838
Bonus & 0 wins -1 0.011251 -0.011251
Total   1.000000 -0.027274

The next three tables are for bets that include the Bonus spot. Remember that for bets that are split between the bonus and the zeroes, there are two ways to win in a Bonus Spin, through landing in the Bonus spot and on the same zeros bet on.

The following table is for bets directly on the Bonus. The lower right cell shows a house edge of 14.28%.

Bonus Bet Analysis

Event Pays Probability Return
Lose -1 0.962025 -0.962025
Bonus & two losses 11 0.035145 0.386598
Bonus & one win 132 0.002775 0.366251
Bonus & two wins 1212 0.000055 0.066372
Total   1.000000 -0.142804

The following table is for split bets on the Bonus and either the Zero or Double-Zero. The lower right cell shows a house edge of 7.98%.

Split Bet between Bonus and One Zero Analysis

Event Pays Probability Return
Lose -1 0.936709 -0.936709
Green win 17 0.025316 0.430380
Bonus and two losses 5 0.033320 0.166599
Bonus and one green 23 0.001801 0.041425
Bonus and one bonus 66 0.002702 0.178306
Bonus and two greens 40 0.000024 0.000974
Bonus and one green & one bonus 83 0.000073 0.006060
Bonus and two bonuses 606 0.000055 0.033186
Total   1.000000 -0.079779

The following table is for three-number bets on the Bonus, Zero and Double-Zero. The lower right cell shows a house edge of 5.89%.

Split Bet between Bonus and One Zero Analysis

Event Pays Probability Return
Lose -1 0.911392 -0.911392
Green win 11 0.050633 0.556962
Bonus and two losses 3 0.031543 0.094629
Bonus and one green 15 0.003505 0.052572
Bonus and one yellow 44 0.002629 0.115658
Bonus and two greens 26 0.000097 0.002531
Bonus and one yellow and one green 55 0.000146 0.008032
Bonus and two yellows 404 0.000055 0.022124
Total   1.000000 -0.058884

Summary

The following table summarizes the house edge on each bet. Note the wide range of house edge from 1.94% to 14.28%. For this reason, I recommend betting on individual numbers only. Remember, all conventional roulette bets may be made by betting on individual numbers.

House Edge Summary

Bet House Edge
Single number 1.94%
Split 1.95%
Street 1.96%
Corner 1.98%
Five number 4.72%
Double street 2.03%
Column 2.29%
Even money 2.73%
Bonus 14.28%
Bonus & one zero 2.29%
Bonus & both zeroes 2.73%

External Links

Play Double Bonus Spin Roulette for free in demo mode at DraftKings.


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