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Twin Blackjack
Introduction
Twin blackjack is a variation of the game of blackjack. I saw the game at the Stardust in August, 2001.
Rules
Each position has two betting spots. If the player makes a bet in both of them he will play out two hands against the dealer's up card. In the event the player gets two blackjacks (called twin blackjacks) they both shall pay 2-1. If the player gets two identical blackjacks (called identical twin blackjacks) both shall pay 4-1.
Analysis
The following table shows what this is worth to the player.
Twin Blackjack
| Event | Probability | Pays Extra | Return |
|---|---|---|---|
| Twin BJ | 0.002142 | 0.5 | 0.001071 |
| Identical twin BJ | 0.000025 | 2.5 | 0.000062 |
| Total | 0.002167 | 0 | 0.001133 |
The lower right cell in the table shows the twin blackjack rules add about 0.1133% to the players return. However, as usual with novelty games, you give more than you get back. In this case, the player may NOT double after a split and the number of splits per hand is lowered from 3 to 2. Under the normal Stardust 6-deck rules the house edge is 0.4066%. Under these rules, not including the twin blackjack bonuses, the house edge is 0.5527%. Overall the house edge is 0.4394%, 0.0328% higher than the conventional rules.