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Thread: Special BJ rules - redouble after double

  1. #1


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    Special BJ rules - redouble after double

    Hi doghand/other BJ expert,

    The BJ rules :-

    a) 6 deck, S17, BJ(3 to 2), ENHC, DAS, DOA, ES10


    b) Non- Ace split to maximum 4 hands , Ace split to maximum 2 hands(only 1 card to split ACE)


    c) Redouble is allow after double, for example, original bet is 1 unit, after double, there are total 2 units for that hand, player allow to REDOUBLE this hand by putting another 1 unit to draw a card, all total bet is now 3 units(NOT 4 units !).


    1) MGP’s Combinatorial analyzer shown that player’s edge is +0.364% off the top! Could you please check the house/player edge with other program such as CVData?


    2) This analyzer only generates strategy for double but no strategy for redouble. According to the “HELP” section of the program, redouble always played optimally. Do you have other program which able to generate complete basic strategy inclusive of strategy for REDOUBLE?


    3) What is the optimum (base on Kelly ratio of 0.5) betting strategy for 2000 units bankroll?



    I am using MGP’s Blackjack Combinatorial Analyzer which can be found : www.blackjackinfo.com/free-blackjack-combinatorial-analyzer.php
    Last edited by James989; 02-26-2014 at 06:48 AM.

  2. #2


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    The player edge off the top would be ~.19%. The rule isn't worth quite as much as a true redouble.

    The game was discussed in more detail here :
    http://www.blackjacktheforum.com/sho...Basic-strategy
    A poster on that threat offered to provide the correct basic strategy for the game if emailed.

  3. #3


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    hi marvin,

    How you get the +0.19% off the top ? CVdata ?

    I can't access to that link, could you please send me the correct basic strategy ?

  4. #4
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    Can you double or redouble for less?

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    This is NOT a true redouble option.

    The bettor gets the option to add 50% of his already doubled bet.

    Obviously, the loss of the option to draw a 4th card, makes this

    (about) as bad as "surrendering" 75% of an original bet, not 50% !
    Last edited by ZenMaster_Flash; 03-01-2014 at 07:37 AM.

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    The O.P. stated: "ENHC . . . ES10"

    How can there be any form of Surrender with ENHC ?


    RE: above Not an excuse. An explanation: I am guilty of posting while . . .
    Last edited by ZenMaster_Flash; 03-03-2014 at 04:47 AM.

  7. #7
    Random number herder Norm's Avatar
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    With ES10 ENHC against a dealer ten, the surrender is handled normally. Against an Ace, the dealer can place a lammer on the bet and resolve once the HC is dealt.
    "I don't think outside the box; I think of what I can do with the box." - Henri Matisse

  8. #8


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    Quote Originally Posted by ZenMaster_Flash View Post

    The O.P. stated: "ENHC . . . ES10"

    How can there be any form of Surrender with ENHC ?
    Common in Europe. Early surrender vs 2-10, no surrender vs A. worth +.24% to the player.
    This variation of the redouble rule is worth around .45% to the player with the correct strategy; enough to get a small edge off the top when combined with the other rules.

    The strategy calls for some unusual plays.
    Let's say you double 11v7 off the top of a new shoe and catch an Ace... how much should you rationally be willing to pay to get an extra hit on your 12v7?

  9. #9


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    Quote Originally Posted by Marvin View Post
    Common in Europe. Early surrender vs 2-10, no surrender vs A. worth +.24% to the player. This variation of the redouble rule is worth around .45% to the player with the correct strategy; enough to get a small edge off the top when combined with the other rules. The strategy calls for some unusual plays. Let's say you double 11v7 off the top of a new shoe and catch an Ace... how much should you rationally be willing to pay to get an extra hit on your 12v7?
    What is the BS strategy ?

  10. #10


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    Quote Originally Posted by James989 View Post
    What is the BS strategy ?
    email me to [email protected] for optimal strategy for tripling rule.

  11. #11
    Senior Member Gramazeka's Avatar
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    SBA supports also rules common in Spanish 21 (lost ties, redouble option, etc.) -

    http://www.sba21.com/Details.html

    SBA Calculator--version 5.0 for optimal bets.
    "Don't Cast Your Pearls Before Swine" (Jesus)

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