Pawpaw
Pawpaw
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March 12th, 2020 at 9:20:24 AM permalink
Seeing is not believing. I have seen a lot of basic strategy cards for my action vs the dealer's up card and most say to HIT (or double) when I have a
Soft 18 vs the dealer 3 card.
There are only three cards that could improve my hand; A, 2 or 3. There are six cards that could lower the count of my Soft 18, a 4, 5, 6, 7, 8 or 9 giving me a new total of 12 thru 17. Of course there are a lot of ten counts that do not change the total. Not as good as my 18 to start. Dealer has to hit and his odds of bust is 37% (rounding). Counting his bust odds plus probability of his stand on 17, the odds of me beating the dealer is 50% if I stand. That may sound like 50/50, but if I Hit there are 6 cards that will lower my total for less that a 50% chance of a win.
What am I missing here?
billryan
billryan
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March 12th, 2020 at 9:36:30 AM permalink
The next card is going to be one of thirteen possibilities. If six of the thirteen cause your hand to deprecate, then seven either improve it or keep it neutral. Whichever number is higher is the better long term choice.
Why do you think a three card hard 18 isn't as good as your starting two card soft 18?
The older I get, the better I recall things that never happened
Pawpaw
Pawpaw
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March 12th, 2020 at 9:56:16 AM permalink
Thanks for your post. A three card 18 is of course not worse, it just carries risk in drawing that card. The heart of the matter is, there are 3 cards to improve the hand and 6 cards to diminish it, why do the odds say hit or double down. Changing from soft to hard 18 is not in the equation.
ChesterDog
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March 12th, 2020 at 10:15:15 AM permalink
Here's some data from Wizard of Odds showing the expected values of A,7 vs 3:

RuleDealer UpPlayerEV standEV hitEV doubleLink
S1737,A0.1511190.0907300.179330source
H1737,A0.1415840.0882300.175215source


You can see that hitting A,7 is much worse than standing. But doubling A,7 is almost twice as good as hitting and better than standing.
billryan
billryan
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March 12th, 2020 at 10:16:12 AM permalink
No. There are seven cards that will improve your hand or keep it the same. Seven plus cards and six negative cards. In situations like that, you want to get as much money as possible on the table.
The older I get, the better I recall things that never happened
unJon
unJon
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March 12th, 2020 at 10:17:43 AM permalink
Quote: billryan

The next card is going to be one of thirteen possibilities. If six of the thirteen cause your hand to deprecate, then seven either improve it or keep it neutral. Whichever number is higher is the better long term choice.
Why do you think a three card hard 18 isn't as good as your starting two card soft 18?



That’s really incorrect advice. You need to weight how the improvements and depreciations impact EV.

To the OP, I’m not aware of the basic strategy that says to hit a soft 18 against a dealer 3 ever. Would you mind linking to what says that?

Doubling is better than standing because it lets you bet more money into a +EV situation even though the hit sacrifices some EV vs standing. Make sense? Think about it as $10 at a 8.5% edge is better than only $5 at a 14% edge.
The race is not always to the swift, nor the battle to the strong; but that is the way to bet.
billryan
billryan
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March 12th, 2020 at 10:21:50 AM permalink
Quote: unJon

That’s really incorrect advice. You need to weight how the improvements and depreciations impact EV.

To the OP, I’m not aware of the basic strategy that says to hit a soft 18 against a dealer 3 ever. Would you mind linking to what says that?

Doubling is better than standing because it lets you bet more money into a +EV situation even though the hit sacrifices some EV vs standing. Make sense? Think about it as $10 at a 8.5% edge is better than only $5 at a 14% edge.



I'm not sure how it is incorrect advice when your advice is exactly the same. Yes, there are other considerations, but the bottom line is you want as much money out there as possible. A twenty page exploration of every single possibility isn't needed.
The older I get, the better I recall things that never happened
unJon
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March 12th, 2020 at 10:47:16 AM permalink
Quote: billryan

I'm not sure how it is incorrect advice when your advice is exactly the same. Yes, there are other considerations, but the bottom line is you want as much money out there as possible. A twenty page exploration of every single possibility isn't needed.



Fair. I got caught up in the OP saying it was a Dh situation and thought you were agreeing.
The race is not always to the swift, nor the battle to the strong; but that is the way to bet.
Pawpaw
Pawpaw
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March 12th, 2020 at 12:23:25 PM permalink
Thanks for all who responded. I see, and do not see your points. From Chester above, my odds are diminished if I hit and that sounds logical since there are 6 "bad" cards in the deck and only 3 "good". Drawing a 10 count makes no difference and I do not do things in life or Blackjack which are of no effect. My brain cannot determine why the odds improve if I double, as in Chester's table above. A card is a card and the shoe does not care how much money is on the table. Yes, I skipped school on the day they did statistics.
sabre
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March 12th, 2020 at 12:39:36 PM permalink
Nobody ever said to hit S18 v 3. That just completely wrong for any set of rules.

Doubling S18v3 is correct. You're diminishing the expected return of the hand per unit bet slightly, but you get to DOUBLE YOUR BET.

If I gave you the option of
a) bet $1 with a 55% chance of winning/45% chance of losing
b) bet $2 with a 53% chance of winning/47% chance of losing

You'd pick option b if your goal is to win the most money.
Pawpaw
Pawpaw
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March 12th, 2020 at 1:23:08 PM permalink
OK guys, I think I am beginning to see something, this is a learning process. Yes, every strategy card out there, WinStar, Vegas, The Wizard of Odds or internet, shows hit the A, 7. It appears part of that reason is the probability of outcome on the dealer's hand. With a 3 the dealer has a 37.4% chance to bust and a 12.7% chance of making 17 and have to stand. In which case my soft 18 wins. That totals 50.1 % chance I beat him. I reject the idea that my odds of wining more often goes up with a double bet. Now during the course of playing 500 hands and each of us had the same cards (ha ha), yes it makes sense to up the bet because of my slight edge.
sabre
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March 12th, 2020 at 3:28:13 PM permalink
Quote: Pawpaw

Yes, every strategy card out there, WinStar, Vegas, The Wizard of Odds or internet, shows hit the A, 7. It appears part of that reason is the probability of outcome on the dealer's hand.



NO NO NO NO NO NO NO NO NO NO NO

There is not a single strategy card posted on wizardofodds that says to hit A,7 vs a dealer 3.

That's because that is the WRONG PLAY.

If you can't double, you stand.
Pawpaw
Pawpaw
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March 13th, 2020 at 5:46:49 AM permalink
Right you are in your exact statement. I have mixed the meaning of words here. Taking a "hit" and "double" both mean you get a third card. Basic strategy shows to double when you can and I was taking that to mean hit and or double if I have funds or feelings for that. So it is stand or double, never hit. Last thing, can you explain why the EV drops off if you hit and the EV goes up if you double. Seems both numbers are based on the step of taking one card. Are those numbers on the Wizard's table based on projected bankroll over time or on a statistical probability on the next card? If I take a hit, I am worse off. If I double, I am better off even though I just took a hit with more money added to the bet. 3 7,A EV 0.151119 Hit 0.090730 Double 0.179330

Thanks to all for posting.
unJon
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March 13th, 2020 at 5:51:26 AM permalink
Quote: Pawpaw

Right you are in your exact statement. I have mixed the meaning of words here. Taking a "hit" and "double" both mean you get a third card. Basic strategy shows to double when you can and I was taking that to mean hit and or double if I have funds or feelings for that. So it is stand or double, never hit. Last thing, can you explain why the EV drops off if you hit and the EV goes up if you double. Seems both numbers are based on the step of taking one card. Are those numbers on the Wizard's table based on projected bankroll over time or on a statistical probability on the next card? If I take a hit, I am worse off. If I double, I am better off even though I just took a hit with more money added to the bet. 3 7,A EV 0.151119 Hit 0.090730 Double 0.179330

Thanks to all for posting.

EV goes up on double because you double your bet size. So you win more. So more EV.
The race is not always to the swift, nor the battle to the strong; but that is the way to bet.
Pawpaw
Pawpaw
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March 13th, 2020 at 5:58:16 AM permalink
OK, thanks, the EV is based on money, not on cards.
unJon
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March 13th, 2020 at 6:04:59 AM permalink
Quote: Pawpaw

OK, thanks, the EV is based on money, not on cards.



EV means expected value and equals the amount of $ you are expected to win or lose.
The race is not always to the swift, nor the battle to the strong; but that is the way to bet.
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