6d, S17, DAS
e.g. u may split AA vs 6 and DD, so $100 become $200x2 hands=$400,
can split &DD on KK but not KQ and all pairs as u like.
u may split 77 vs 7 without DD.
what is extra adv ?
my hand cal is about 0.5-0.6%
thks
DAS, including split aces, is worth 0.388 if you may resplit the aces to four hands, but only 0.32 if you may split only once.
In your example, you mention that you may split and double down on KK, but, of course, that is impossible. What are you going to double??
Don
I think he is saying that you can double with only one card,in the example. He would first split kings, and then double twice, once on each king, same with the ace, ace split.
Have never heard of anything like that. Worth a great deal for the tens and the aces.
Don
SCAA71,
I took the WoO's 6D S17 EV tables and estimated the "Split-Double" (SD) EV's as twice the DD EV (against the appropriate dealer's upcard) for a player's hand of 6-5 (for A-A), 6-4 (for X-X), and 6-3 (for 9-9): these estimates are approximate, of course, but should be pretty close to the "real" values.
I then calculated the "Delta EV" as the difference between the EV-maximizing plays for the "SD BS" and the "normal" BS: if this value is zero, then SD BS says NOT to split-double.
For the probability of each SD hand, I used the WoO's probability for the initial split hand for A-A and 9-9; for X-X, I divided the WoO's prob. by 4 to account approximately for the "no SD on KQ" rule: again, this is only approximately true, but should be close enough for a 6D game.
I then multiplied each "Delta EV" by the corresponding Probability and summed to get the EV Gain, which was 0.005004, or about 0.5%.
The new BS is to SD for A-A vs. 2-10, X-X vs. 2-7, and 9-9 vs. 3-6. Although SD is +EV for, say, X-X vs. 8, the Stand EV is higher still.
Naturally, if you're counting cards you'd have additional gains, as you would SD A-A vs. A, for example, if the count warrants a DD on 11 vs. A.
Hope this helps!
Dog Hand
P.S. Don, I've heard of this rule specifically for A-A at some upper Midwest tribal casinos, but have not encountered it myself.
Started to do the same thing, using the BJA3 e.v. tables, but thought that the value came mostly from the aces, so would add just a little more to the 0.38% I quoted. Turns out that that's correct.
Nice work!
Don
Do they allow you to double normally after taking the second card on each hand? If that is the case, then the computation becomes a bit more complicated. For example, if you split/double on 9 you lose the EV from drawing a 2 and doubling on 11.
Dale Hope,
The EV for "split-doubling" 9-9 vs. 6 (for example) is approximated as twice the EV for doubling down with a 6-3 vs. 6: this DD EV already takes into account the possibility of having to stand on 11.
Dog Hand
thanks to Dog hand, as well Don.
the extra gain of sp AA is half of 0.38%?
isn`t it ?
