question about BS table on this site
  • On the tables on this site, it suggests BS on 11 vs dealer's Ace is just to hit, not to double. All the other sources I have found tell me to "always double on 11." # of decks doesnt seem to influence this decision. Just curious as to why this discrepancy exists. What game rules might have an effect on the decision?

    By the way, my name is John. Im a newcomer to blackjack and have enjoyed this site and reading through some of the posts on this board.
  • Welcome John. In a Single deck game it is correct to DD with an 11 vs the Ace. In 6 deck games you just hit. Study the rules for the game that You will be playing. Unfortunatly most of todays single deck games are not worth playing, with the 6/5 BJ, bad rules, ect.
  • I think I just found the answer to my own question. It seems that whether the dealer hits on soft 17 or stands on soft 17 makes all the difference.

    Consider the expected values for two different games , everything else being equal except for the hit on soft 17 rule.

    Game A: 6 decks, dealer stands on all 17s:
    9,2 vs A hit= 0.147155 double= 0.121507
    8,3 vs A hit= 0.147279 double= 0.124094
    7,4 vs A hit= 0.147352 double= 0.126725
    6,5 vs A hit= 0.147596 double= 0.12971

    Game B: 6 decks, dealer hits on soft 17:
    9,2 vs A hit= 0.107036 double= 0.115609
    8,3 vs A hit= 0.107445 double= 0.118796
    7,4 vs A hit= 0.107943 double= 0.122285
    6,5 vs A hit= 0.108668 double= 0.124007

    This data suggest that it is indeed correct to only hit on 11 vs dealers Ace if you are playing a "dealer stands on all 17s" game. However it is slightly advantageous to double in this situation if you are playing a game where the dealer hits on soft 17s!

    I obtained this data from the expected value and hand probabilities charts on the bjmath.com site.

    http://www.bjmath.com/bjmath/ev/ev.htm

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