Two Deck Blackjack Counting

Deck
  • Appendices
  • Miscellaneous
  • External Links

Introduction

  1. The only playing index tested so far for the OPP count is the insurance index, which adds an additional 0.009% edge to all games tested (2, 6 and 8 decks) The running count insurance index for a 6-deck game is +12. For a 2-deck game the index is +5, and for an 8-deck game the index is +14.
  2. As stated above, Multi-deck blackjack was introduced to minimise the possibilities of card counting by involving two, four, six or eight decks of cards used simultaneously. Due to differences in the number of decks, the odds and house advantage varies. Listed below is the house advantage for multi-deck blackjack.
  3. 10s = -2; In balanced card counting systems, you start the count at 0 and move the count up or down based on the card counting values. But in unbalanced systems like the Zen 2, you start the count by multiplying the number of decks by -2. So in a single deck game, the count would start at -2 and move up and down from there.
  4. In the event that all other rules are equal, then the more decks a Blackjack game has, the greater the House Edge will be against the player, which is to say that there will be a lesser return to player. In the case of card counting, multiple decks are something of a boon and a bane to card counters.

I am going to be trying counting cards in double deck blackjack game and see if counting cards will truly help me building up my bankroll. I will be playing.

In blackjack every card that is played has an impact on the distribution of the remaining cards. The following lists will show exactly how to play your cards immediately after a shuffle in a double deck game where the dealer stands on a soft 17.

To use this guide first go to the list according to the number of cards in your hand. Then note the basic strategy changes and finally the exceptions to the changes. For example if you have a 16 composed of a 10, 4, and 2 against a 10 look under the 3 card list. You will see that with three cards you should stand on 16 against 10. Going further you will see there are some exceptions, for example with a 16 composed of a 6, 6, and 4 you should hit. However 10+4+2 is not listed as an exception so you should stand. It should not be interpreted that this is a card counting guide. Everything is based on exact cards and no numbers represent a count. Some of these plays will not agree with even the best card counting strategies. These tables are always right while card counting is an estimate of the best play. Counting cards does not take into consideration the exact composition of the remaining deck as this analysis does.

Basic Strategy Changes: None Two Deck Blackjack Counting

Exceptions:

  1. 11 (9+2) vs Ace = Hit
  2. 11 (8+3) vs Ace = Hit
  3. 12 (10+2) vs 4 = Hit

Three Cards

Basic Strategy Changes:
  1. 16 vs 10 = Stand
  2. Soft 18 vs A = Stand
Exceptions:
  1. 16 (6+6+4) vs 10 = Hit
  2. 16 (7+6+3) vs 10 = Hit
  3. 16 (8+6+2) vs 10 = Hit
  4. 16 (9+6+A) vs 10 = Hit
  5. 16 (10+3+3) vs 10 = Hit
  6. Soft 18 (A+A+6) vs A = Hit
Basic Strategy Changes:
  1. 16 vs 10 = Stand
  2. Soft 18 vs A = Stand
Exceptions:
  1. 16 (6+6+2+2) vs 10 = Hit
  2. 16 (6+6+3+A) vs 10 = Hit
  3. 16 (7+6+2+A) vs 10 = Hit
  4. 16 (8+6+A+A) vs 10 = Hit
  5. 16 (10+2+2+2) vs 10 = Hit
  6. 16 (10+3+2+A) vs 10 = Hit
  7. 16 (4+4+4+4) vs 9 = Stand
  8. 16 (5+4+4+3) vs 9 = Stand
  9. 16 (5+5+3+3) vs 9 = Stand
  10. 16 (5+5+4+2) vs 9 = Stand
  11. 16 (5+5+5+A) vs 9 = Stand

Five Cards

Basic Strategy Changes:
  1. 16 vs 10 = Stand
  2. Soft 18 vs A = Stand
Exceptions:
  1. 16 (6+3+3+2+2) vs 10 = Hit
  2. 16 (7+6+A+A+A) vs 10 = Hit
  3. 16 (10+2+2+A+A) vs 10 = Hit
  4. 16 (6+6+2+A+A) vs 10 = Hit
  5. 16 (4+4+4+3+A) vs 9 = Stand
  6. 16 (4+4+4+2+2) vs 9 = Stand
  7. 16 (4+4+3+3+2) vs 9 = Stand
  8. 16 (4+3+3+3+3) vs 9 = Stand
  9. 16 (5+5+3+2+A) vs 9 = Stand
  10. 16 (5+4+4+2+A) vs 9 = Stand
  11. 16 (5+4+3+3+A) vs 9 = Stand
  12. 16 (5+5+2+2+2) vs 9 = Stand
  13. 16 (5+4+3+2+2) vs 9 = Stand
  14. 16 (5+3+3+3+2) vs 9 = Stand

Two Deck Blackjack Counting Guide

Basic Strategy Changes:
  1. 16 vs 10 = Stand
  2. Soft 18 vs A = Stand
Exceptions:
  1. 12 (4+4+A+A+A+A) vs 3 = Stand
  2. 16 (A+A+2+4+4+4) vs 7 = Stand
  3. 16 (A+A+3+3+4+4) vs 7 = Stand
  4. 16 (A+2+2+3+4+4) vs 7 = Stand
  5. 16 (A+2+3+3+3+4) vs 7 = Stand
  6. 16 (A+3+3+3+3+3) vs 7 = Stand
  7. 16 (2+2+2+3+3+4) vs 7 = Stand
  8. 16 (2+2+3+3+3+3) vs 7 = Stand
  9. 16 (A+3+3+3+3+3) vs 8 = Stand
  10. 16 (2+2+3+3+3+3) vs 8 = Stand
  11. 16 (3+3+3+3+3+a) vs 9 = Stand
  12. 16 (3+3+3+3+2+2) vs 9 = Stand
  13. 16 (4+4+4+2+a+a) vs 9 = Stand
  14. 16 (4+4+3+3+a+a) vs 9 = Stand
  15. 16 (4+4+3+2+2+a) vs 9 = Stand
  16. 16 (4+3+3+3+2+a) vs 9 = Stand
  17. 16 (4+4+2+2+2+2) vs 9 = Stand
  18. 16 (4+3+3+2+2+2) vs 9 = Stand
  19. 16 (5+5+3+a+a+a) vs 9 = Stand
  20. 16 (5+4+4+a+a+a) vs 9 = Stand
  21. 16 (5+5+2+2+a+a) vs 9 = Stand
  22. 16 (5+4+3+2+a+a) vs 9 = Stand
  23. 16 (5+3+3+3+a+a) vs 9 = Stand
  24. 16 (5+4+2+2+2+a) vs 9 = Stand
  25. 16 (5+3+3+2+2+a) vs 9 = Stand
  26. 16 (5+3+2+2+2+2) vs 9 = Stand
  27. 16 (6+6+A+A+A+A) vs 10 = Hit
  28. 16 (6+3+2+2+2+A) vs 10 = Hit
  29. 16 (6+2+2+2+2+2) vs 10 = Hit

Methodology

The fine points of basic strategy was determined using a combinatronic and recursive program that made the optimal play at every step considering the exact distribution of remaining cards. This program was also used to create the basic strategy charts for one and multiple decks.

Internal Links

  • Blackjack main page.
  • Appendix 1:Total dependent expected return table for an infinite deck.
  • Appendix 2a:Dealer probabilities after dealer peeks for blackjack.
  • Appendix 2b:Dealer probabilities before dealer peeks for blackjack.
  • Appendix 3a:Composition dependent exceptions to single deck basic strategy where the dealer stands on soft 17.
  • Appendix 3b:Composition dependent exceptions to double deck basic strategy where the dealer stands on soft 17.
  • Appendix 3c:Composition dependent exceptions to single deck basic strategy where the dealer hits a soft 17.
  • Appendix 4:Details on the standard deviation in blackjack.
  • Appendix 5:Infinite deck expected return according to player hand and dealer up card.
  • Appendix 6:Fine points of when to surrender.
  • Appendix 7:Effect of card removal.
  • Appendix 8:Analysis of some popular blackjack side bets includingSuper Sevens, Streak, Royal Match, and a tie.
  • Appendix 9:Composition dependent expected returns for 1, 2, 4, 5, 6, and 8 decks.
  • Appendix 10:The effect on the house edge of the continuous shuffling machines vs. the cut card.
  • Appendix 11: Value and strategy for 678 and 777 bonuses.
  • Appendix 12:Risk of ruin statistics.
  • Appendix 13:Probabilities in the first four cards. May be used to test for the number of decks in online blackjack.
  • Appendix 14:Value of each initial player card.
  • Appendix 15:House edge using total dependent vs composition dependent basic strategy
  • Appendix 16: Basic strategy when dealer exposes both cards.
  • Appendix 17: The Ace-Five Count. Possibly the easiest way to count cards.
  • Appendix 18: Basic strategy exceptions for three to six cards.
  • Appendix 19: Blackjack splitting strategy when a back-player is betting.
  • Appendix 20: Blackjack doubling strategy, when doubling after splitting aces is allowed.
  • Appendix 21: Details on the Wizard's Simple Strategy.
  • '21' Movie — Truth and Fiction : My comments on the movie '21.'
  • Australian Blackjack: Rules and odds for blackjack down under.
  • Rule Variations: The effect of just about every known blackjack rule change.
  • Automatic Winner Charlie Rule in Blackjack.

Written by: Michael Shackleford
  • Appendices
  • Miscellaneous
  • External Links

Two Deck Blackjack Strategy

On This Page

Two Deck Blackjack Counting Machines

Introduction

Casino gamblers resolution crossword clue puzzle answers. 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.

Two Deck Blackjack Chart

Other basic strategy rules.

Two Deck Blackjack Counting Sheet

  • 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 5 or 6, otherwise hit.

Two Deck Blackjack Counting Machines

Ideally, the basic strategy shows the play which, on average, will result in the greatest win or the least loss per initial hand played. The way I usually go about this is to look at the initial 2-card hands only. Generally, this will result in the overall best play. However, soft 18 against a dealer ace when the dealer stands on soft 17 provides the only known exception that I am aware of for any number of decks. As my blackjack appendix 9 shows, a 2-card soft 18 vs A has an expected value of hitting of -0.100359, and of standing -0.100502. So with two cards it is very slightly better to hit. However, not all soft 18's are composed of two cards. The more the cards in the player's hand the more the odds favor standing. Simulations show that if forced to always hit or always stand, it is better to stand. I would like to thank Don Schlesinger for bringing this unusual play to my attention.


Two Deck Blackjack Counting Rules

Written by:Michael Shackleford