Do I have an edge of the top?

Cardcounter

Well-Known Member
The game is single deck blackjack you are allowed to double on any two cards, you can surrender after dealer checks for blackjack, if you get 6 cards without busting you automatically win, no das, split as many times as you like except aces. Insurance offered. If I play two hands and make correct insurnance decisions do I have an edge right of the top of the deck? Plus blackjack pay 3:2 not 6:5 like some other greedy places.
 

Mimosine

Well-Known Member
SD, DOA, LS, noDAS, Split to 4 hands, noRSA H17: 0.26
SD, DOA, LS, noDAS, Split to 4 hands, noRSA S17: 0.09

In a 6-deck game the 6-card Charlie rule is worth 0.16% but in a single-deck game it less valuable and only gives the player 0.08%

-from wizard of odds.

S17 game is 'beatable' with insurance.
H17 is not. H17 can't be beaten with index play alone.

A 1-2 spread will make both winning games.
 

Cardcounter

Well-Known Member
I know

But they don't have a calucator for all the rules the house edge under optimal play is .12% and realistic is .26% but that doesn't consider the 6 card charlie rule. Plus it does not consider playing 2 hands and taking insurance when you have an edge on the insurance bet! Plus you can use the information in your first hand two make a little bit better choice on your second hand. If you where to make optimal plays and play better than basic stragedy could you get an edge of the top of the deck and if so how big of an edge.
 

bj bob

Well-Known Member
Cardcounter said:
The game is single deck blackjack you are allowed to double on any two cards, you can surrender after dealer checks for blackjack, if you get 6 cards without busting you automatically win, no das, split as many times as you like except aces. Insurance offered. If I play two hands and make correct insurnance decisions do I have an edge right of the top of the deck? Plus blackjack pay 3:2 not 6:5 like some other greedy places.
Gee, are we talking about Fitzgerald's under the new mgmt, perhaps? The DOA, LS rules yield a .10% HA, so if you restrict your index plays (I don't see why) to insurance only, I would suppose you would have turned the HA negative, even though slightly, by playing perfect BS and flat betting.
 

k_c

Well-Known Member
Cardcounter said:
The game is single deck blackjack you are allowed to double on any two cards, you can surrender after dealer checks for blackjack, if you get 6 cards without busting you automatically win, no das, split as many times as you like except aces. Insurance offered. If I play two hands and make correct insurnance decisions do I have an edge right of the top of the deck? Plus blackjack pay 3:2 not 6:5 like some other greedy places.
I get +.15% for S17 and -.03% for H17 using comp dependent strategy and assuming the six-card auto winner applies to all hands, including split hands and also a max of 3 splits is allowed for non-ace pairs. Unlimited splits on non-aces will add a very small amount. If total dependent strategy is used decrease the EV by about .04%.

k_c
 

bj bob

Well-Known Member
k_c said:
I get +.15% for S17 and -.03% for H17 using comp dependent strategy and assuming the six-card auto winner applies to all hands, including split hands and also a max of 3 splits is allowed for non-ace pairs. Unlimited splits on non-aces will add a very small amount. If total dependent strategy is used decrease the EV by about .04%.

k_c
K C, Did you take LS into account?
 

Kasi

Well-Known Member
k_c said:
I get +.15% for S17 and -.03% for H17 using comp dependent strategy and assuming the six-card auto winner applies to all hands, including split hands and also a max of 3 splits is allowed for non-ace pairs. Unlimited splits on non-aces will add a very small amount. If total dependent strategy is used decrease the EV by about .04%.

k_c

You're saying player advantage for even a BS player with S17 and a slight HA with H17? That's about what I got anyway.
 

k_c

Well-Known Member
shadroch said:
How does playing two hands make a difference?
If played independently each hand has the same EV. The case could be made that the second hand has a slightly higher EV, though, because it will be played using more information than is available to the first hand. The same logic applies for a third base player in a non-heads-up game. I think Thorp said a single deck game could be positive EV by flat betting and sitting at third base and making correct index plays. Beat the Dealer is the only book I've seen that attempts to quantify the value of index plays. Other sources say the ill18 give 80% of the value of full index play. But 80% of what? I would be intersted to know. I'm sure the value of index play declines as more decks are added.

k_c
 

Kasi

Well-Known Member
k_c said:
Beat the Dealer is the only book I've seen that attempts to quantify the value of index plays. Other sources say the ill18 give 80% of the value of full index play. But 80% of what? I would be intersted to know. I'm sure the value of index play declines as more decks are added.k_c
Not sure exactly what you mean but BJA shows a pretty rigorous methodolgy for quantifying the contribution an index play makes to a counter's overall advantage. He mentions Carlson did research on it too.
 

k_c

Well-Known Member
Kasi said:
Not sure exactly what you mean but BJA shows a pretty rigorous methodolgy for quantifying the contribution an index play makes to a counter's overall advantage. He mentions Carlson did research on it too.
What I would like to know is the value of index play to a flat bettor. What is your EV if you do nothing but flat bet and play correct indices? I'm sure it'll be a function of number of decks and penetration. Also in a very deeply dealt shoe I think there is the potential of some indices going haywire, but I guess you would just have to accept that as a small part of the overall picture.

k_c
 

Kasi

Well-Known Member
k_c said:
What I would like to know is the value of index play to a flat bettor. What is your EV if you do nothing but flat bet and play correct indices? I'm sure it'll be a function of number of decks and penetration.k_c
Of course it also depends on the counting system I'd imagine in the sense each hand would have a playing efficeiency attached to it. Like the 7 in Hi-Lo makes it is pretty worthless for any info on 14 vs 10 kind of thing.

It sounds like your question is the kind of stuff Carlson was doing. Apparently in Blackjack Forum Dec 1995.
 

jack.jackson

Well-Known Member
My guess is PE, divided by # of decks In play. For example, a system with a PE of .60 adds .1 for a 6D game.
 

sagefr0g

Well-Known Member
k_c said:
......... Other sources say the ill18 give 80% of the value of full index play. But 80% of what? I would be intersted to know. I'm sure the value of index play declines as more decks are added.

k_c
k_c i'm pretty sure the illustrious 18 was wrought from a four deck s17das game.75% pen. also a 1-12 spread where player goes from one hand to two hands at tc>=5. the idea was i believe so that the i18 could be a sort of one shoe fits all sort of deal but Schlesinger did say people would be adjusting it to their particular games, betting, count systems ect.
the 80% figure is i believe meant to be compared to say if you used 150 thru 200 of the known index departures. in other words you could throw out 90% of them and still retain 80% of their power using just the i18 .
 

Mimosine

Well-Known Member
KO BJ shows pretty decisively that bet spreading is far more beneficial than indices. and of the indices insurance is more valuable than the next 10-15 of the I18 combined. index play alone will only make the most choice games neutral EV, look for house edges less than .15
 

k_c

Well-Known Member
Mimosine said:
KO BJ shows pretty decisively that bet spreading is far more beneficial than indices. and of the indices insurance is more valuable than the next 10-15 of the I18 combined. index play alone will only make the most choice games neutral EV, look for house edges less than .15
I'm not saying anything against bet spreading. I just think that to see what is gained from indices, the best way would be to separate index play from bet spreading. What would be left would be an EV for a flat betting index player. Theoretically that should be better than the HA the basic strategy faces but by how much?

Combining bet spreading with index play might make index play look more valuable than it really is.

k_c
 

Mimosine

Well-Known Member
k_c said:
. Theoretically that should be better than the HA the basic strategy faces but by how much?
Honestly i think the best way to figure this out is to sim it. For some games and some rules it will be much more valuable, like if LS is offered. it will probably make a very small difference depending on how many people are seated, and for sure the number of decks will matter. then the number of indicies used, and the count. I think i read hi/lo + I18 + Fab4. oh yeah the all important pen will also have a huge effect. if pen is 50% you'll never be using index plays to the point where they'll make a difference. negative index plays like 13v2 12v6 etc are in the clear minority, the vast majority of index plays are employed in + counts, so you have to make sure you see those + counts...

From what I recall, i think a house edge of around .15 is what you're looking to trim off, though LS changes things quite a bit. and i can't back this up with any 'official' citation, though in my defense no one else here has been able to offer a more accurate number....
 
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