Doubling on Blackjack

[antibes]

Does anybody know what the rate of winning is when you double up on Blackjack using WoO strategy tables.

If it is only 50/50 I don't see the point of ever doubling.

[GrandMaster]

I calculated this some time last year and posted the results here.

The probability of winning is usually 50%-60%, the probability of a tie is around 10%.

[caruso]

If it is only 50/50 I don't see the point of ever doubling.

If it were, you wouldn't.

I once did a very extensive manual run using D9 rules, and got 60/40 in favour. Factoring in soft doubles, it's probably about 56/44.

BTW, on the subject of BJ theory: check out the BJmath website. My estimation of them has just gone through the floor - they're advertising Golden Palace:

"Looking to Play BlackJack for Free or Money? Play Online.
This casino has a 300% bonus and good statistical odds. Test your strategies online."

Bah, gimme a break. These people should be setting an example. How about putting up one of the REPUTABLE casinos on the homepage? Intercasino? iNetbet? 32Red?

Jeez.

[scrollock]

out of interest what are the odds for the following

11v5
11v6
10v5
10v6

also if any can oblige what are the odds of the dealer drawing to 20/21 when starting on 5/6

[antibes]

I have never liked doubling on soft Aces but do according to the chart.

So if I ignored them, and just doubled on 9, 10 or 11 it wouldn't make much difference then.

[bpb]

I have never liked doubling on soft Aces but do according to the chart.

So if I ignored them, and just doubled on 9, 10 or 11 it wouldn't make much difference then.

You're giving up about .1% when you don't double any soft totals. So about a $1 loss per $1000 wagered. (Based on the wizards Blackjack house edge calculator)

Doesn't seem like much. But when you're playing a game with a .4% HA, you're increasing the house edge by over 25% when you don't double your soft totals.

[GrandMaster]

out of interest what are the odds for the following

11v5
11v6
10v5
10v6

Probability of win/tie/loss
11v5 0.621849, 0.0699025, 0.308249
11v6 0.635285, 0.0666062, 0.298109
10v5 0.596309, 0.0709274, 0.332764
10v6 0.612106, 0.0680937, 0.3198

also if any can oblige what are the odds of the dealer drawing to 20/21 when starting on 5/6

http://wizardofodds.com/blackjack/bjapx2.html or http://wizardofodds.com/blackjack/bjapx2b.html .

[antibes]

How on earth can you be so accurate with the odds!

Different subject - splitting 8s.

I cannot see the advantage of splitting 8s when the dealer has 10 or A, or even 9.

I hit being 16 as most times I was losing 2 bets when I split.

[caruso]

How on earth can you be so accurate with the odds!

No secret. All these numbers are listed in the BJmath glossary.

[caruso]

I cannot see the advantage of splitting 8s when the dealer has 10 or A, or even 9.

You lose less. Two eights as the initial card beat the hell out of one hard 16, whatever the dealer's showing.