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Thread: Basic Strategy Double Down Win-Loss %?

  1. 02-07-2014, 07:16 AM #1
    moses
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    Basic Strategy Double Down Win-Loss %?

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    Last edited by moses; 10-05-2017 at 02:04 PM.
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  2. 02-07-2014, 09:44 AM #2
    DSchles
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    In general hard doubles win 60% of the time and soft doubles 53-55%.

    Don
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  3. 02-07-2014, 01:35 PM #3
    Gronbog
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    I generated these tables using my own software. They include data for all doubles (i.e. both the original hand double and those made after splitting). The sim was run with 1 player playing 1 deck, shuffled after each hand, H17, DOA2, DAS, splitting 3 times, for a total of 4 hands was allowed, except for split aces which get 1 card only. Each entry is win%/lose%push%.

    I hope you fund them useful.

    Code:
    Hard Double Down Outcome Table
Key: (Win%/Lose%/Push%)
Hand         A                2                3                4                5                6                7                8                9                10
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
   4: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
   5: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
   6: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
   7: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
   8: (      -       ) (      -       ) (      -       ) (      -       ) (50.7/43.5/ 5.8) (51.1/43.5/ 5.5) (      -       ) (      -       ) (      -       ) (      -       )
   9: (      -       ) (49.1/43.4/ 7.4) (51.3/41.6/ 7.1) (53.8/39.4/ 6.8) (56.2/37.2/ 6.6) (56.3/37.2/ 6.5) (      -       ) (      -       ) (      -       ) (      -       )
  10: (      -       ) (56.7/35.2/ 8.1) (58.4/33.7/ 7.9) (60.1/32.3/ 7.5) (62.3/30.6/ 7.1) (62.3/30.6/ 7.1) (57.7/35.3/ 7.0) (54.5/38.6/ 6.9) (49.9/41.5/ 8.6) (      -       )
  11: (51.3/40.8/ 7.8) (59.6/32.4/ 8.0) (61.0/31.3/ 7.7) (62.6/30.0/ 7.4) (64.4/28.5/ 7.0) (64.6/28.6/ 6.7) (58.3/34.4/ 7.3) (54.8/37.8/ 7.4) (52.0/40.8/ 7.2) (50.6/42.5/ 6.9)
  12: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
  13: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
  14: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
  15: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
  16: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
  17: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
  18: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
  19: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
  20: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
All  4: (      -       )
All  5: (      -       )
All  6: (      -       )
All  7: (      -       )
All  8: (50.9/43.5/ 5.6)
All  9: (53.4/39.8/ 6.9)
All 10: (57.8/34.7/ 7.5)
All 11: (56.6/36.2/ 7.2)
All 12: (      -       )
All 13: (      -       )
All 14: (      -       )
All 15: (      -       )
All 16: (      -       )
All 17: (      -       )
All 18: (      -       )
All 19: (      -       )
All 20: (      -       )
All: (56.2/36.6/ 7.2)

Soft Double Down Outcome Table
Key: (Win%/Lose%/Push%)
Hand         A                2                3                4                5                6                7                8                9                10
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 A,A: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
 A,2: (      -       ) (      -       ) (      -       ) (50.7/44.8/ 4.6) (53.2/42.5/ 4.3) (54.1/41.7/ 4.2) (      -       ) (      -       ) (      -       ) (      -       )
 A,3: (      -       ) (      -       ) (      -       ) (50.9/45.2/ 3.9) (53.1/42.8/ 4.0) (54.1/42.0/ 3.9) (      -       ) (      -       ) (      -       ) (      -       )
 A,4: (      -       ) (      -       ) (      -       ) (50.2/45.6/ 4.2) (52.6/43.7/ 3.7) (53.6/42.5/ 3.9) (      -       ) (      -       ) (      -       ) (      -       )
 A,5: (      -       ) (      -       ) (      -       ) (49.7/46.3/ 4.0) (51.8/44.4/ 3.8) (54.1/42.4/ 3.6) (      -       ) (      -       ) (      -       ) (      -       )
 A,6: (      -       ) (46.5/45.6/ 7.9) (48.1/44.3/ 7.6) (50.3/42.3/ 7.4) (53.4/39.3/ 7.3) (53.1/39.9/ 7.0) (      -       ) (      -       ) (      -       ) (      -       )
 A,7: (      -       ) (      -       ) (50.8/41.3/ 7.8) (54.1/38.4/ 7.5) (54.9/37.5/ 7.6) (55.4/37.3/ 7.3) (      -       ) (      -       ) (      -       ) (      -       )
 A,8: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (58.1/34.8/ 7.1) (      -       ) (      -       ) (      -       ) (      -       )
 A,9: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
  BJ: (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       ) (      -       )
All A,A: (      -       )
All A,2:  (52.7/43.0/ 4.4)
All A,3:  (52.7/43.3/ 4.0)
All A,4:  (52.3/43.8/ 3.9)
All A,5:  (51.8/44.4/ 3.8)
All A,6:  (50.1/42.4/ 7.5)
All A,7:  (53.8/38.6/ 7.5)
All A,8:  (58.1/34.8/ 7.1)
All A,9:  (      -       )
All  BJ: (      -       )
All: (52.4/42.0/ 5.6)
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  4. 02-07-2014, 08:57 PM #4
    DSchles
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    Nice charts! When you restate the percentages to exclude pushes, such that you have just win-lose percentages, you get 60.6 for the hard doubles and 55.5 for the soft, which is more or less what people quote.

    Don
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  5. 02-08-2014, 10:07 AM #5
    Gronbog
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    Thanks. It's always nice to get a similar result from a reliable source.
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