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Thread: Please help to provide Basic Strategy

  1. #14


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    Thanks, Gronbog

  2. #15


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    Quote Originally Posted by Gronbog View Post
    See http://gronbog.org/results/blackjack...litAces.6.html which is the same strategy generated independently by me.

    lds means to double for any amount but for a little as possible, otherwise stand
    dls means to double for any amount but for as much as possible, otherwise stand
    ls means to double for less only of you can do so for less than the critical fraction of your initial bet.

    If you hover your mouse over the data in a given cell, you will see the expected value of each available action. In the case of A,3 vs A, you will see

    Double for zero (theoretical) has an EV of -0.31 or -31% of your original bet
    Double for the full amount has an EV of -0.62 or -62% of your original bet
    Double for other amounts will have an EV between these two extremes
    Stand has an EV of -0.66 or -66% of your original bet

    This is why the strategy for this hand is to double for as little as possible. It is a defensive play. Basic strategy would be to hit, but you don't have that option. The next best option is to pay as little as possible to take a card. The less you can double for, the closer this becomes to hitting.

    Of special note are A,6 vs T and A and A,7 vs 9 and T. For these hands you double for less only if you can do so for less than the critical fraction of your original bet, otherwise stand. Hovering your mouse over A,7 vs T you will see that the critical fraction is 4.86%. That is, if you had bet $100, you would need be able to double for $4 or less.
    Thanks, Gronbog.

    Could you please help me to generate the similar strategy table for these scenarios :-

    (A)
    1) 6 deck, S17, peek.
    2) DOA, DAS.
    3) RSA2( Pair A, A split to max 2 hands only), RS4( other pair can split to max 4 hands).
    4) ES10.
    5) Split (A, A) can ONLY STAND or Double but NOT HIT.


    (B)
    1) 6 deck, S17, No Peek.
    2) DOA, DAS.
    3) RSA2( Pair A, A split to max 2 hands only), RS4( other pair can split to max 4 hands).
    4) ES10.
    5) Split (A, A) can ONLY STAND or Double but NOT HIT.


    (C)
    1) 8 deck, S17, peek.
    2) DOA, DAS.
    3) RSA2( Pair A, A split to max 2 hands only), RS4( other pair can split to max 4 hands).
    4) ES10.
    5) Split (A, A) can ONLY STAND or Double but NOT HIT.


    (D)
    1) 8 deck, S17, No Peek.
    2) DOA, DAS.
    3) RSA2( Pair A, A split to max 2 hands only), RS4( other pair can split to max 4 hands).
    4) ES10.
    5) Split (A, A) can ONLY STAND or Double but NOT HIT.
    Last edited by James989; 05-18-2018 at 03:43 PM.

  3. #16


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    Quote Originally Posted by James989 View Post
    Thanks, Gronbog.

    Could you please help me to generate the similar strategy for these scenarios :-

    (A)
    1) 6 deck, S17, peek.
    2) DOA, DAS.
    3) RSA2( Pair A, A split to max 2 hands only), RS4( other pair can split to max 4 hands).
    4) ES10.
    5) Split (A, A) can ONLY STAND or Double but NOT HIT.


    (B)
    1) 6 deck, S17, No Peek.
    2) DOA, DAS.
    3) RSA2( Pair A, A split to max 2 hands only), RS4( other pair can split to max 4 hands).
    4) ES10.
    5) Split (A, A) can ONLY STAND or Double but NOT HIT.


    (C)
    1) 8 deck, S17, peek.
    2) DOA, DAS.
    3) RSA2( Pair A, A split to max 2 hands only), RS4( other pair can split to max 4 hands).
    4) ES10.
    5) Split (A, A) can ONLY STAND or Double but NOT HIT.


    (D)
    1) 8 deck, S17, No Peek.
    2) DOA, DAS.
    3) RSA2( Pair A, A split to max 2 hands only), RS4( other pair can split to max 4 hands).
    4) ES10.
    5) Split (A, A) can ONLY STAND or Double but NOT HIT.
    Usually there's no difference between 6 and 8 decks in terms of basic strategy. So just find the difference between peek and no peek. (probably just not wanting to double 11 v A)

  4. #17


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    You can find the double on split aces in a few of the northern Michigan indian casinos.

  5. #18
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    Posts
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    Quote Originally Posted by BoSox View Post
    Speaking of the site itself, https://www.blackjackinfo.com Is not assessable to me any longer because I keep getting a message that it is not a secure site. This is the full message I get.


    This site can’t provide a secure connection

    www.blackjackinfo.com uses an unsupported protocol.
    ERR_SSL_VERSION_OR_CIPHER_MISMATCH



    Hide details

    The client and server don't support a common SSL protocol version or cipher suite. This is likely to be caused when the server needs RC4, which is no longer considered secure.
    This is your firewall protector doing its thing. Any gambling site or porn site generally will not be allowed by the software unless you do a work around or the site pays a fee to be cleared as safe by the software.

  6. #19
    Banned or Suspended
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    BoSox,

    IF on a Mac ...

    Turn off your Firewall.

    Go to System Preferences > Security and Privacy > Firewall > OFF

    You may have virus/malware checkers. Permit the site.


  7. #20


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    Quote Originally Posted by James989 View Post
    Could you please help me to generate the similar strategy table for these scenarios :-
    Quote Originally Posted by CountinCanadian View Post
    Usually there's no difference between 6 and 8 decks in terms of basic strategy. So just find the difference between peek and no peek
    Assuming that the no peek rule is to lose all of your doubles and splits (ENHC), and with ES10, the doubling/splitting strategy for Aces vs T and A will change and the post-split strategy for split aces may change. I can generate that for you. As CC says, there will be no difference between 6 and 8 decks.

  8. #21


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    Quote Originally Posted by Gronbog View Post
    Assuming that the no peek rule is to lose all of your doubles and splits (ENHC), and with ES10, the doubling/splitting strategy for Aces vs T and A will change and the post-split strategy for split aces may change. I can generate that for you. As CC says, there will be no difference between 6 and 8 decks.

    Please help to generate 8 deck BS for peek and no peek. Thanks

  9. #22


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    I was away for a few days. I will generate the strategy for you for NOPEEK assuming you lose all bets to a dealer blackjack (ENHC). You already have the post-split strategy for PEEK. The pre-split strategy for PEEK does not change from the normal basic strategy.

  10. #23


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    Quote Originally Posted by Gronbog View Post
    I was away for a few days. I will generate the strategy for you for NOPEEK assuming you lose all bets to a dealer blackjack (ENHC). You already have the post-split strategy for PEEK. The pre-split strategy for PEEK does not change from the normal basic strategy.

    Thanks in advance

  11. #24


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    Quote Originally Posted by BoSox View Post
    Speaking of the site itself, https://www.blackjackinfo.com Is not assessable to me any longer because I keep getting a message that it is not a secure site.
    Quote Originally Posted by Gronbog View Post
    I can post there. I'll let the moderators know.
    The admin there tells me that the problem should be fixed now.

  12. #25


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    Quote Originally Posted by James989 View Post
    Rules :-

    1) 6 deck, S17, peek.
    2) DOA, DAS
    3) RSA2( Pair A, A split to max 2 hands only), RS4( other pair can split to max 4 hands)
    4) ES10
    5) Split (A, A) can ONLY STAND or Double but NOT HIT, Example (A,A vs 6), split to form 2 hands (A,2) and (A,4), then you can DOUBLE( or STAND) BUT NOT HIT !

    Please help to provide correct basic strategy with consideration of Rule 5.

    Thanks
    Unfortunately my combinatorial analyzer http://www.bjstrat.net/cgi-bin/cdca.cgi only has the rules option of doubling after splitting aces only if hitting of split aces is also allowed. However, with a some additional work you can use it to compute what you are looking for by following these steps:

    1. Remove 1 ace from the starting shoe composition. (For 6 decks the starting number of aces will be 23 following this step.) Make sure DOA (double on any 2 cards) is selected as a rule option. Also uncheck the option to compute EV conditioned on no dealer blackjack where applicable for a reason that will become apparent below. Removal of 1 ace allows for a split pair of aces before computing the first split hand.

    2. Enter player cards of A-2 through A-T under player cards, pressing compute after each entry.

    3. After step 2 the stand, double, and hit EVs will be displayed. Ignore the hit EV since hitting is not allowed and choose the best option between doubling and standing as the strategy.

    4. For a hand of A-T the program considers A-T to be a blackjack which automatically wins if dealer does not have blackjack. In order to compute this hand as a non-blackjack we need to look at the dealer probabilities in order to compute the stand EV. A player hand of 21 wins if dealer has 17, 18, 19, 20, or busts. 21 pushes a dealer 21 and loses to a dealer blackjack so stand EV = p17+p18+p19+p20+pBust-pDBJ where p17, p18, p19, p20, p21, pBust, pDBJ = probability of dealer 17, 18, 19, 20, 21, bust, blackjack versus each up card. We compare this to a double EV that was computed unconditionally (not conditioned on dealer not having blackjack.)

    For 6 decks s17 split ace hands of A-2 through A-9 I get these strategies. You would definitely double when double EV is positive and greater than stand EV. Sometimes double EV is greater than stand EV although both are negative. In these cases you would be better off doubling but doubling for less would be a better option.

    A-2 double vs. 3,4,5,6 otherwise consider doubling for less
    A-3 double vs. 3,4,5,6 otherwise consider doubling for less
    A-4 double vs. 4,5,6 otherwise consider doubling for less
    A-5 double vs. 4,5,6 otherwise consider doubling for less
    A-6 double vs. 3,4,5,6 consider doubling for less vs. 2,7,8,9
    A-7 double vs. 3,4,5,6 otherwise stand
    A-8 stand vs. all up cards
    A-9 stand vs. all up cards

    I have not computed A-T but I suspect that the best strategy is to stand versus all up cards.

    Hope this is helpful.

    k_c

  13. #26


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    Quote Originally Posted by Gronbog View Post
    The admin there tells me that the problem should be fixed now.
    Thanks Gronbog, but it is still not working for me. I have a different anti virus this year, "Kaspersky is no longer available in the USA through stores" which is Norton this could be the problem. Not to mention I am still running Windows XP system, and using some version of Google Chrome. Thank you again for reporting it.

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