4-Deck to 8-Deck Blackjack Strategy (original) (raw)
- Appendices
- 1: Total dependent expected return table for an infinite deck
- 2a: Probabilities of dealer blackjack after peek
- 2b: Probabilities of dealer blackjack before peek
- 3a: Exceptions to single-deck S17 basic strategy
- 3b: Exceptions to double-deck S17 basic strategy
- 3c: Exceptions to single-deck H17 basic strategy
- 4: Blackjack standard deviation details
- 5: Infinite deck expected return by player hand and dealer upcard
- 6: Fine points of when to surrender
- 7: Effect of card removal
- 8: Analysis of blackjack side bets
- 9: Composition-dependent expected returns for 1 to 8 decks
- 10: Continuous shuffling machine vs. cut card
- 11: Value and strategy for 678 and 777 bonuses
- 12: Risk of ruin statistics
- 13: Probabilities in the first four cards
- 14: Value of each initial player card
- 15: House edge using total-dependent vs. composition-dependent basic strategy
- 16: Basic strategy when dealer exposes both cards
- 17: The Ace-Five card counting method
- 18: Basic strategy exceptions for three to six cards
- 19: Blackjack splitting strategy when a back-player is betting
- 20: Blackjack doubling strategy when doubling after splitting aces is allowed
- 21: Details on the Wizard\’s Simple Strategy
- Miscellaneous
- External Links
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Last updated: Sep 16, 2024
On this page
Introduction
To use the basic strategy, look up your hand along the left vertical edge and the dealer's up card along the top. In both cases an A stands for ace. From top to bottom are the hard totals, soft totals, and splittable hands. There are two charts depending on whether the dealer hits or stands on soft 17.
Other basic strategy rules.
- Never take insurance or "even money."
- If there is no row for splitting (fives and tens), then look up your hand as a hard total (10 or 20).
- If you can't split because of a limit on re-splitting, then look up your hand as a hard total, except aces. In the extremely unlikely event you have a pair of aces you can't re-split and drawing to split aces is allowed, then double against a 6, otherwise hit.
If you play a mixture of six-deck games, some where the dealer hits a soft 17, and some where he stands, and you only wish to memorize one strategy, I would recommend you memorize the one where the dealer stands on soft 17. The cost in errors due to playing the wrong strategy is 2.3 times higher playing a stand on soft 17 game, with the hit on 17 strategy, than vise versa.
Basic Strategy in Text
For the benefit of my blind readers, here is the above strategy in text form, when the dealer stands on soft 17 and surrender is allowed. To use the strategy, start at the top, and follow the first rule that applies.
Surrender
- Surrender hard 16 (but not a pair of 8s) vs. dealer 9, 10, or A, and hard 15 vs. dealer 10.
Split
- Always split aces and 8s.
- Never split 5s and 10s.
- Split 2s and 3s against a dealer 4-7, and against a 2 or 3 if DAS is allowed.
- Split 4s only if DAS is allowed and the dealer shows a 5 or 6.
- Split 6s against a dealer 3-6, and against a 2 if DAS is allowed.
- Split 7s against a dealer 2-7.
- Split 9s against a dealer 2-6 or 8-9.
Double
- Double hard 9 vs. dealer 3-6.
- Double hard 10 except against a dealer 10 or A.
- Double hard 11 except against a dealer A.
- Double soft 13 or 14 vs. dealer 5-6.
- Double soft 15 or 16 vs. dealer 4-6.
- Double soft 17 or 18 vs. dealer 3-6.
Hit or Stand
- Always hit hard 11 or less.
- Stand on hard 12 against a dealer 4-6, otherwise hit.
- Stand on hard 13-16 against a dealer 2-6, otherwise hit.
- Always stand on hard 17 or more.
- Always hit soft 17 or less.
- Stand on soft 18 except hit against a dealer 9, 10, or A.
- Always stand on soft 19 or more.
As I've said many times, the above strategy will be fine under any set of rules. However, for you perfectionists out there, here are the modifications to make if the dealer hits a soft 17.
- Surrender 15, a pair of 8s, and 17 vs. dealer A.
- Double 11 vs. dealer A.
- Double soft 18 vs. dealer 2.
- Double soft 19 vs. dealer 6.
My thanks to Kelly for putting together the above text strategy.