QFIT
QFIT
Joined: Feb 12, 2010
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Thanks for this post from:
LouisTrez
June 13th, 2017 at 9:54:38 AM permalink
The calculator at the QFIT site does not take into account the cut card effect. I'll replace it with my newer calculator at: https://www.blackjacktheforum.com/resourcespage.php?do=edgepage

Arnold's calculations are based on numbers from 1983, do not take into account the CCE, and ignore interactions between rules. You cannot simply add rule effects since they interact with each other.

Update: I just replaced the QFIT calculator with the newer one.
"It is impossible to begin to learn that which one thinks one already knows." -Epictetus
LouisTrez
LouisTrez
Joined: Mar 29, 2017
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June 13th, 2017 at 11:39:11 AM permalink
qfit, you are the man with the answers!

How about this one. I am running an analysis of 4-card 16 vs. 10 to see which has the better EV: Hit, Stand, or "Rule of 45". I usually use the WoO Hand Calculator for each permutation, but it seems to crash on all combinations with 2 aces. I have seen another Hand Calculator somewhere but can't find it now. Do you know another one?
QFIT
QFIT
Joined: Feb 12, 2010
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June 13th, 2017 at 12:17:19 PM permalink
There was one long way back; but it's gone. I don't know of any other online BJ combinatorial analyzers.
"It is impossible to begin to learn that which one thinks one already knows." -Epictetus
LouisTrez
LouisTrez
Joined: Mar 29, 2017
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June 13th, 2017 at 2:25:32 PM permalink
What say you Mr. Wizard? Any chance you could take a look at your Hand Calculator and see why it crashes on 4-card hands that contain 2 Aces? The result comes back as STAND -1.000000. Thanks
JB
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JB
Joined: Oct 14, 2009
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June 13th, 2017 at 2:36:47 PM permalink
I did the programming on that, so I'll investigate.
JB
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JB
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June 14th, 2017 at 7:25:30 AM permalink
Fixed. The problem was with hands with multiple aces, the hand total wasn't always being correctly calculated. For example, if you entered A/3/A/A, it was incorrectly being treated as a busted total of 26, hence the only option it saw was to "stand" with an EV of -1.
LouisTrez
LouisTrez
Joined: Mar 29, 2017
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June 14th, 2017 at 9:33:16 AM permalink
Aha. Figured it was something like that. Thanks JB!! You guys are good.

fyi, here's the results I get now for 4-card 16 vs. 10 including the permutations with 2 aces (double deck, 1st hand after shuffle):

STAND -54.26%
HIT -54.99%
"Rule of 45" -54.20%

So if my math is correct, the "Rule of 45" edges out STAND but the difference is only about 1 bet in 1,741 hands so it's value is more in a trivia contest than real life.
JB
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JB
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June 14th, 2017 at 10:20:05 AM permalink
By the way, here is another good blackjack calculator.
LouisTrez
LouisTrez
Joined: Mar 29, 2017
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June 14th, 2017 at 11:52:51 AM permalink
Quote: JB

By the way, i]here is another good blackjack calculator.


Yes, that's the other one I was looking for! Thanks JB
shallnot
shallnot
Joined: Sep 28, 2016
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June 16th, 2017 at 9:43:59 AM permalink
Quote: gamerfreak

Here is my C# code that uses cryptographically strong pseudo random numbers to shuffle a deck:



I would say that your routine, as other people's before it, randomizes the deck(s) rather than “shuffles” it (them). With this routine there is a chance that the top card of the deck before the randomization could appear on the bottom of the deck after the randomization. This doesn’t happen after one riffle shuffle (or even two or three).

Technically this routine could completely reverse the deck’s order which is not possible in a riffle shuffle, a wash, or via continuous shufflers. (Yeah, someone’s going to try to prove me wrong on this point.)

I would like to see a routine that models:
- washing cards
- a riffle shuffle with n decks
- various continuous shufflers

I’d have a go at it but I haven’t programmed in 17 years, don’t have a need for one, and have too many programming projects that I am already not creating.

Steven

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