Confusion for Basic Strat. on A/7 vs. 2 when dealer hits soft 17.. Blackjack Bluebook
  • I have Fred Renzey's Blackjack Bluebook which I think is great and helped me win money at the casino. In it it says the only 2 changes made when the dealer hits soft 17 are double down on 11 vs. A, and A/8 vs. 6 (page 55). However upon further research (www.bj21.com) it says you also double down on A/7 vs 2. Who is right here?

    I realize if count is high enough you double down anyway but I'm just looking at basic strategy right now..
  • sammylightfoot said:
    I have Fred Renzey's Blackjack Bluebook which I think is great and helped me win money at the casino. In it it says the only 2 changes made when the dealer hits soft 17 are double down on 11 vs. A, and A/8 vs. 6 (page 55). However upon further research (www.bj21.com) it says you also double down on A/7 vs 2. Who is right here?

    I realize if count is high enough you double down anyway but I'm just looking at basic strategy right now..



    In shoe games, the BS play is double A7 vs 2, when the dealer hits soft 17.

    Go to www.wizardofodds.com and you can see the two BS charts side-by-side,
  • stainless steel rat said:
    In shoe games, the BS play is double A7 vs 2, when the dealer hits soft 17.


    When putting Bluebook's basic strategy rules variations together, I elected to ignore A/7 vs. 2 as an H17 double down revision because of its negligible gain (over standing) at neutral counts, and its flatter gain increase at positive counts compared to those of 11 vs. A and A/8 vs. 6.

    Looking back, in the interest of technical correctness, this probably turned out to be lax, though simpler and perhaps practical.
  • sammylightfoot said:
    I have Fred Renzey's Blackjack Bluebook which I think is great and helped me win money at the casino. In it it says the only 2 changes made when the dealer hits soft 17 are double down on 11 vs. A, and A/8 vs. 6 (page 55). However upon further research (www.bj21.com) it says you also double down on A/7 vs 2. Who is right here?

    I realize if count is high enough you double down anyway but I'm just looking at basic strategy right now..


    Well, using my Combinatorial Analyzer I have the following results:

    Single Deck
    A7 vs. 2 Stand=12.77, DD=12.45

    Double Deck
    A7 vs. 2 Stand=11.89, DD=11.95

    4 Decks
    A7 vs. 2 Stand=11.45, DD=11.71

    6 Decks
    A7 vs. 2 Stand=11.31, DD=11.63

    8 Decks
    A7 vs. 2 Stand=11.24, DD=11.59


    As you can see, only in multiple decks games you have a very small gain by doubling vs. standing. I will not even consider this play when looking to make money in BJ. You can do whatever you please and it will not make a big difference.

    Also in Double Decks S17, DAS. Against the Ace only double down on 56 and 74 but hit 83 or 92. In 4,6 or 8 decks just hit any 11 vs. Ace unless the count tells you to double.

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