Roulette 19

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Introduction

Roulette-18 is similar to roulette, except has 19 different outcomes. It can be played with either a custom roulette wheel or 20-sided icosahedron. You can find it at some of the Grosvenor casinos in the UK.

Rules

The game uses an icosahedron, which for the non-math nerds is one of the five platonic solids, in this case the one with 20 triangles. The die is numbered 0 to 18, plus a 00. If the 00 is rolled, then all bets have no action and the die is rolled again. The following bets are available on the outcome of the roll.

  • Straight up: Bet on an individual number. Pays 17 to 1.
  • Split: Bet on two adjacent numbers of the betting payout. Pays 8 to 1.
  • Street: Bet on a row of three numbers of the betting payout. Pays 5 to 1.
  • Corner: Bet on four adjacent numbers of the betting payout. Pays 7 to 2.
  • Line: Bet on six adjacent numbers of the betting payout. Pays 2 to 1.
  • Odd: Bet on all the odd numbers. Pays 1 to 1.
  • Even: Bet on all the even numbers. Pays 1 to 1.
  • 1-9: Bet on the number 1 to 9. Pays 1 to 1.
  • 10-18: Bet on the number 10 to 18. Pays 1 to 1.
  • Red: Bet on the nine red numbers. Pays 1 to 1.
  • Black: Bet on the nine black numbers. Pays 1 to 1.

Analysis

The following tables show the analysis of each bet. The double-zero is ignored because all bets continue to have action after a double-zero is rolled.

Straight Up

EventPaysNumbersProbabilityReturn
Win1710.0526320.894737
Loss-1180.947368-0.947368
Total191.000000-0.052632
Dpt vaccine roulette 1982 full

Split

EventPaysNumbersProbabilityReturn
Win820.1052630.842105
Loss-1170.894737-0.894737
Total191.000000-0.052632

Street

EventPaysNumbersProbabilityReturn
Win530.1578950.789474
Loss-1160.842105-0.842105
Total191.000000-0.052632

Corner

EventPaysNumbersProbabilityReturn
Win3.540.2105260.736842
Loss-1150.789474-0.789474
Total191.000000-0.052632

Line

EventPaysNumbersProbabilityReturn
Win260.3157890.631579
Loss-1130.684211-0.684211
Total191.000000-0.052632

All Even Money Bets

EventPaysNumbersProbabilityReturn
Win190.4736840.473684
Zero-0.510.052632-0.026316
Loss-190.473684-0.473684
Total191.000000-0.026316

Strategy

All even money bets have a rule that if the die lands on zero then the player loses half only. This cuts the house edge in half from 5.26% to 2.63%. Thus, much like in European roulette, my advice is to stick to the even money bets only.

Rule Card

Here is a scan of the rule card.


Roulette 19

Actual Roulette-18 dice, kindly given to me at the Global Gaming Expo.

Roulette 101


Roulette

Roulette 19 Game

Written by: Michael Shackleford