| ~ @Com ~ The
Effects of RULE VARIATIONS On the net Since 1994 |
 |
| ~ @Com ~ The
Effects of RULE VARIATIONS On the net Since 1994 |
|
Percent Gain |
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| Average | THORP | BRAUN | WONG | HUMBLE | Various sources | |
| No Insurance | -0.4 | |||||
| Two decks | -0.33 | -0.35 | -0.16 | -0.4 | -0.38 | -0.35 |
| Four decks | -0.51 | -0.51 | -0.5 | -0.54 | -0.50 | |
| Five decks | -0.29 | -0.03 | -0.54 | |||
| Six decks | -0.4 | -0.05 | -0.54 | -0.6 | ||
| Soft 17 | ||||||
| Dealer hits soft 17 | -0.2 | -0.2 | -0.2 | -0.2 | -0.2 | |
| Dealer hits soft 17 only with ace up | -0.23 | |||||
| Dealer hits soft seventeen is optional | -0.23 | |||||
| Double Down | ||||||
| Double down on any two cards | 0.3 | |||||
| Double down on 10 & 11 only | -0.26 | |||||
| Double down on 9, 10, 11 only | -0.13 | |||||
| Forbid doubling down on | ||||||
| all soft hands | -0.15 | -0.14 | -0.1 | -0.2 | -0.14 | |
| Hard 8 | O | O | ||||
| Hard 9 | -0.12 | -0.14 | -0.1 | -0.1 | -0.14 | |
| Hard 10 | -0.54 | -0.56 | -0.5 | -0.56 | ||
| Hard 11 | -0.85 | -0.89 | -0.8 | |||
| Allow doubling down after splitting pairs | 0.12 | 0.14 | 0.1 | 0.1 | 0.13 | |
| Allow doubling down on any 3 cards | 0.19 | 0.19 | 0.19 | |||
| Allow doubling down on 3 or more cards | 0.21 | 0.2 | 0.2 | 0.2 | 0.24 | |
| Split | ||||||
| Draw any number of cards to split aces | 0.13 | 0.14 | 0.1 | 0.14 | 0.14 | |
| Forbid splitting aces | -0.16 | |||||
| Forbid splitting any pair | -0.46 | |||||
| Resplit aces | 0.02 | |||||
| Further splitting of pairs: One deck | 0.05 | |||||
| Two decks | 0.08 | |||||
| Four decks | 0.11 | |||||
| All pairs 2 decks, unlimited draw to split aces | 0.06 | |||||
| In General | 0.05 | |||||
| all pairs except aces | 0.06 | 0.02 | 0.1 | |||
| all pairs including aces | 0.2 | 0.2 | ||||
| Puerto Rican Rules | ||||||
| One Deck | -0.71 | |||||
| Two Decks | -1.04 | |||||
| Surrender | ||||||
| Surrender | 0.1 | |||||
| Late surrender (Las Vegas) | 0.05 | 0.06 | 0.06 | 0.02 | ||
| Early surrender (Atlantic City) | 0.62 | 0.62 | 0.62 | .62 - .72 | ||
Other |
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| Dealer shuffles when new player enters game | -0.5 | |||||
| No Hole Card | -0.13 | |||||
| Dealer wins ties | -9 | |||||
| A,J of spades always wins double | 0.04 | |||||
| Blackjack is paid double | 2.32 | 2.32 | 2.32 | |||
| Blackjack always wins but is paid even | -2.06 | |||||
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