orster52: Spanish 21 Hole Card Charts

[orster52]

I've created hole card charts for Spanish 21,H17,DDD and for Spanish 21,S17, and for Spanish 21,H17. I've compared them to the regular blackjack hole card charts for the 6D,H17,DAS,LS,RSA game and the 6D,S17,DAS,LS,RSA game. Lower case indicates a change from the regular blackjack hole card game.

SPANISH21,H17,DDD HOLE CARD BASIC STRATEGY

DEALER HAND
HAND4 5 6 7 8 9 1011 1213141516 17181920 AAA2A3A4A5A6
19 S S S S S S S S S S S S S S S S R S S S S S S
18 S S S S S S S S S S S S S S S R R S S S S S S
17 S S S S S S S S S S S S S S h R R S S S S S S
16 S S S H H h h R S S S S S H H R R h h S S S H
15 S S S H H H h h S S S S S H H h R h h S S S H
14 S S S H H H h h S S S S S H H h R H h h S S H
13 h h S H H H H h S S S S S H H h R H H H h h H
12 h h h H H H H H h S S S S H H H R H H H H h H
11 D D D D D D D H D D D D D H H H H D D D D D D
10 D D D D D h H H D D D D D H H H H D D D D D D
9 D D D H H H H H D D D D D H H h R H H H H d H
8 H d D H H H H H D D D D D H H h R H H H H H H
7 H H d H H H H H d D D D D H H H R H H H H H H
6 H H d H H H H H d d D D D H H H R H H H H H H
5 H H d H H H H H d d D D D H H H R H H H H H H
A9 S S S S S S S S S s s D D S S S S S S S S S S
A8 S S s S S S S S s D D D D S S S h S S S S S S
A7 D D D S S H H S D D D D D S H H H H h h S h S
A6 D D D H H H H H D D D D D H H H H H H H H h H
A5 D D D H H H H H D D D D D H H H H H H H H H H
A4 D D D H H H H H D D D D D H H H H H H H H H H
A3 D D D H H H H H D D D D D H H H H H H H H H H
A2 d D D H H H H H D D D D D H H H H H H H H H H
AA P P P P P P P P P P P P P P p p p P P P P P P
1010S S S S S S S S S S s P P S S S S S S S S S S
99 P P P S P P S S P P P P P S P P R S S s s P S
88 P P P P P P p R P P P P P P P R R P P P P P P
77 P P P P H H h H P P P P P P H h R H H P P P P
66 P P P H H H H H P P P P P P H H R H H H h P H
44 H d d H H H H H h d d d d H H h R H H H H H H
33 P P P P P H H H P P P P P P P H R H H H H P H
22 P P P P P H H H P P P P P P P H R H H H H P H

S=STAND H=HIT D=DOUBLE P=SPLIT R=SURRENDER NO R=H

SPANISH21,S17 HOLE CARD BASIC STRATEGY

DEALER HAND
HAND4 5 6 7 8 9 1011 1213141516 17181920 AAA2A3A4A5
19 S S S S S S S S S S S S S S S S R S S S S S
18 S S S S S S S S S S S S S S S R R S S S S S
17 S S S S S S S S S S S S S S H R R S S S S S
16 S S S H H h h R S S S S S H H R R h h h S S
15 S S S H H H h h S S S S S H H h R h h h S S
14 S S S H H H h h S S S S S H H h R H H h S S
13 h h h H H H H h S S S S S H H h R H H H H h
12 h h h H H H H H h S S S S H H H R H H H H H
11 D D D D D D D H D D D D D H H H H D D D D D
10 D D D D D h H H D D D D D H H H H H D D D D
9 h h D H H H H H D D D D D H H H R H H H H H
8 H H H H H H H H h D D D D H H h R H H H H H
7 H H H H H H H H H h h h D H H h R H H H H H
6 H H H H H H H H H H h h h H H H R H H H H H
5 H H H H H H H H H H h h h H H H R H H H H H
A9 S S S S S S S S S s s D D S S S S S S S S S
A8 S S s S S S S S s D D D D S S S H S S S S S
A7 D D D S S H H S D D D D D S H H h S S S S s
A6 D D D H H H H H D D D D D H H H h H H H H H
A5 h h D H H H H H D D D D D H H H h H H H H H
A4 h h h H H H H H D D D D D H H H h H H H H H
A3 H h h H H H H H D D D D D H H H H H H H H H
A2 H h h H H H H H D D D D D H H H H H H H H H
AA P P P P P P P P P P P P P P p p p P P P P P
1010S S S S S S S S S s s P P S S S S S S S S S
99 P P P S P P S S P P P P P S P P R S S S s s
88 P P P P P P p R P P P P P P P R R P P P P P
77 P P P P H H h h P P P P P P H h R H H P P P
66 P P P H H H H H P P P P P P H H R H H H H h
44 H h h H H H H H h d d d d H H h R H H H H H
33 P P P P P H H H P P P P P P P h R H H H H P
22 P P P P p H H H P P P P P P P H R H H H H P

S=STAND H=HIT D=DOUBLE P=SPLIT R=SURRENDER NO R=H

SPANISH21,H17 HOLE CARD BASIC

DEALER HAND
HAND4 5 6 7 8 9 1011 1213141516 17181920 AAA2A3A4A5A6
19 S S S S S S S S S S S S S S S S R S S S S S S
18 S S S S S S S S S S S S S S S R R S S S S S S
17 S S S S S S S S S S S S S S H R R S S S S S S
16 S S S H H H H R S S S S S H H R R H H S S S H
15 S S S H H H H H S S S S S H H H R H H S S S H
14 S S S H H H H H S S S S S H H H R H H H S S H
13 H H S H H H H H S S S S S H H H R H H H H H H
12 H H H H H H H H H S S S S H H H R H H H H H H
11 D D D D D D D H D D D D D H H H H D D D D D D
10 D D D D D H H H D D D D D H H H H D D D D D D
9 H H D H H H H H D D D D D H H H R H H H H H H
8 H H H H H H H H H D D D D H H H R H H H H H H
7 H H H H H H H H H H H H D H H H R H H H H H H
6 H H H H H H H H H H H H H H H H R H H H H H H
5 H H H H H H H H H H H H H H H H R H H H H H H
A9 S S S S S S S S S S S D D S S S S S S S S S S
A8 S S S S S S S S S D D D D S S S H S S S S S S
A7 D D D S S H H S D D D D D S H H H H H H S H S
A6 D D D H H H H H D D D D D H H H H H H H H H H
A5 H D D H H H H H D D D D D H H H H H H H H H H
A4 H H D H H H H H D D D D D H H H H H H H H H H
A3 H H H H H H H H D D D D D H H H H H H H H H H
A2 H H H H H H H H D D D D D H H H H H H H H H H
AA P P P P P P P P P P P P P P P P P P P P P P P
1010S S S S S S S S S S S P P S S S S S S S S S S
99 P P P S P P S S P P P P P S P P R S S S S P S
88 P P P P P P P R P P P P P P P R R P P P P P P
77 P P P P H H H H P P P P P P H H R H H P P P P
66 P P P H H H H H P P P P P P H H R H H H H P H
44 H H H H H H H H H D D D D H H H R H H H H H H
33 P P P P P H H H P P P P P P P H R H H H H P H
22 P P P P P H H H P P P P P P P H R H H H H P H

S=STAND H=HIT D=DOUBLE P=SPLIT R=SURRENDER NO R=H

Comments 6D,H17,DDD as different from regular blackjack:

1. Spanish 21 basic strategy changes are 13-4H;13-5H;12-4H;12-5H;12-6H;8-5D;8-6D;7-6D;6-6D;5-6D;A8-6S;A3-4D;A2-4D;16-9H;16-10H;15-10H;14-10H;10-9H;22-8P.

2. 17-18H. EV for H is -.416.

17-11S. 17-AR is spanish 21 basic strategy. EV for S is -.452. EV for H is -.572.

16-11R. 16-AR is spanish 21 basic strategy. EV for H is -.526. EV for S is -.577.

15-11H. 15-AH is spanish 21 basic strategy. EV for H is -.487. EV for S is .-577.

14-11H and 13-11H. 14-AH and 13-AH is spanish 21 basic strategy.

3. 12-12H. EV for H is -.112. EV for S is -.148.

12-13S. EV for S is -.06. EV for H is -.065.

13-12S. EV for S is -.148. EV for H is -.183.

13-13S. EV for S is -.06. EV for H is -.143.

4. 7-12D;6-12D;5-12D. Dealer bust rates for 11 is 21.2%, for 12 is 42.6%, for 13 is 47.0%, for 14 is 51.1%, for 15 is 54.9%, for 16 is 58.3%. 7-6D;6-6D;5-6D are all basic strategy. In spanish 21 it is possible to redouble, for example 7-12, dealt a 4, and then redouble is correct. This is not available in regular blackjack.

5. A9-13S;A9-14S;1010-13S;1010-14S. The dealer bust rates in regular blackjack are higher for 13(52.0%) and 14(55.4%). EV for A9-13S,1010-13S is +.682. EV for D,P is +.587. EV for A9-14S,1010-14S is +.707. EV for D.P is +.695.

6. 15-19H. EV for His -.47. EV for H is -.543 if you don't H 17+.

16-19R. EV for H is -.511.

14-19H. EV for H is -.426. EV for H is -.511 if you don't H 17+.

13-19H. EV for H is -.378. Ev for H is -.473 if you don't H 17+.

12-19H. EV for H is -.329.

13-20R. EV for H is -.596.

12-20R. EV for H is -.562.

7. A8-20H. EV for H is -.485.

A7-20H. EV for H is -.461.

8. AA-18;AA-19;AA-20. In spanish 21 you can resplit and hit split aces, which encourages the split.

9. 16-AAH;16-A@H;15-AAH;15-A2H;14-A2H;14-A3H;13-A5H. Spanish 21 dealer bust rates are AA(22.0%),A2(24.6%),A3(27.2%),A4(29.0%),A5(32.7%), A6(21.2%). Regular blackjack dealer bust rates are AA(26.7%),A2(29.3%),A3(31.9%),A4(34.5%),A5(37.0%), A6(21.2%). So in spanish 21 the delaer busts less than regular blackjack. R is better than S for AA and A2 because the bust rate is less than 25%.

10. 9-A5D. Spanish 21 basic strategy is 9-3D with dealer bust rate of 33.8%. A5 bust rate is 32.7%. 9-2H is basic strategy instead of D when the bust rate is 31.9%. 9-A5D is regular blackjack basic strategy for 2D,H17,DAS,RSA but is H for 6D. In spanish 21 you can double 9 if dealt a 2.

11. A7-A5H. A7-3S is basic strategy with dealer bus t rate of 33.8%. A5 bust rate is 32.7%.

12. 99-A3S;99-A4S. 99-2S is basic strategy with bust rate of 31.9%. A3(27.2%) and A4(29.9%0 bust rates are less.

13. 66-A4H. 66-3H is basic strategy with a bust rate of 33.8%. A4(29.9%) is less.

14. 8-19H. EV for H is -.358.

15. 22-20R EV for H is -.54.

16. 11-11H. EV for D is +.030.

17. A7-11S. EV is -.204.

18. 44-5D;44-6D is spanish 21 basic strategy instead of P as in regular blackjack.

Comments 6D,S17 as different from regular blackjack:

1. 13-4H;13-5H;13-6H;12-4H;12-5H;12-6H;9-4H;9-5H;A5-4H;A5-5H;A4-4H;A4-5H;A4-6H;A3-5H;A3-6H;A2-5H;A2-6H;44-5H;44-6H;16-9H;16-10H;15-10H;15-AH;14-10H;14-AH;13-AH;10-9H;A7-AH;88-10P;77-10H;77-AH;22-8P are spanish 21 basic strategy decisions.

2. 9-12D;8-12H;7-13H;7-14H; 6-14H;6-15H,6-16H;5-14H;5-15H;5-16H. In the S17 game you can't redouble if a small card is dealt so the play is changed. EV for 9-12D is +.201. EV for H is +.161. EV for 8-12D is -.004. EV for 8-13D is +.237. EV for H is +.194. EV for 7-15H is +.335. EV for D is +.285. 7-16D EV is +.417. EV for H is +.390. 6-16H EV is +.416. EV for D is +.177.

3. 16-AAH;16-A2H;16-A3H;15-AAH;15-A2H;15-A3H;14-A3H;13-A5H. 16-AAH EV is -.49. The S17 dealer bust rates are AA(19.4%);A2(22.2%);A3(24.0%);A4(28.0%),A5(30.9%). It is better to R than to S against AA,A2,A3 because the bust rates are less than 25%.

4. A7-A5H. A7-3S is basic strategy with bust rate of 33.8%. A5 bust rate is 30.9%.

5. A2-12D. EV is +.201.

A5-12D. EV is +.201. EV for H is +.150.

A7-12D. EV for S is +.197

A8-12S. EV is +.426. EV for D is +.393.

A8-13D. EV is +.517. EV for H is +.470.

6. 99-A4S;99-A5S. Basic strategy is 99-2S with bust rate of 31.9%. A5(30.9%) and A4(28.0%) bust rates are less.

7. 66-A5H. Basic strategy is 66-3H with bust rate of 33.8%. A5(30.9%) bust rate is less.

The above charts are best for the exposed card situation where the dealer just turns over her card for the table to see. In the hole card game,where the exposure is unknown to the dealer, you will probably modify the above charts in order to maintain the game. Are you really going to surrender 19-20R and like plays? It looks odd to hit hard 17 and above.

Good luck.

[PCF]

[orster52]

> I've created hole card charts for Spanish 21,H17,DDD
> and for Spanish 21,S17, and for Spanish 21,H17. I've
> compared them to the regular blackjack hole card
> charts for the 6D,H17,DAS,LS,RSA game and the
> 6D,S17,DAS,LS,RSA game. Lower case indicates a change
> from the regular blackjack hole card game.

> SPANISH21,H17,DDD HOLE CARD BASIC STRATEGY

> DEALER HAND
> HAND4 5 6 7 8 9 1011 1213141516 17181920 AAA2A3A4A5A6
> 19 S S S S S S S S S S S S S S S S R S S S S S S
> 18 S S S S S S S S S S S S S S S R R S S S S S S
> 17 S S S S S S S S S S S S S S h R R S S S S S S
> 16 S S S H H h h R S S S S S H H R R h h S S S H
> 15 S S S H H H h h S S S S S H H h R h h S S S H
> 14 S S S H H H h h S S S S S H H h R H h h S S H
> 13 h h S H H H H h S S S S S H H h R H H H h h H
> 12 h h h H H H H H h S S S S H H H R H H H H h H
> 11 D D D D D D D H D D D D D H H H H D D D D D D
> 10 D D D D D h H H D D D D D H H H H D D D D D D
> 9 D D D H H H H H D D D D D H H h R H H H H d H
> 8 H d D H H H H H D D D D D H H h R H H H H H H
> 7 H H d H H H H H d D D D D H H H R H H H H H H
> 6 H H d H H H H H d d D D D H H H R H H H H H H
> 5 H H d H H H H H d d D D D H H H R H H H H H H
> A9 S S S S S S S S S s s D D S S S S S S S S S S
> A8 S S s S S S S S s D D D D S S S h S S S S S S
> A7 D D D S S H H S D D D D D S H H H H h h S h S
> A6 D D D H H H H H D D D D D H H H H H H H H h H
> A5 D D D H H H H H D D D D D H H H H H H H H H H
> A4 D D D H H H H H D D D D D H H H H H H H H H H
> A3 D D D H H H H H D D D D D H H H H H H H H H H
> A2 d D D H H H H H D D D D D H H H H H H H H H H
> AA P P P P P P P P P P P P P P p p p P P P P P P
> 1010S S S S S S S S S S s P P S S S S S S S S S S
> 99 P P P S P P S S P P P P P S P P R S S s s P S
> 88 P P P P P P p R P P P P P P P R R P P P P P P
> 77 P P P P H H h H P P P P P P H h R H H P P P P
> 66 P P P H H H H H P P P P P P H H R H H H h P H
> 44 H d d H H H H H h d d d d H H h R H H H H H H
> 33 P P P P P H H H P P P P P P P H R H H H H P H
> 22 P P P P P H H H P P P P P P P H R H H H H P H

> S=STAND H=HIT D=DOUBLE P=SPLIT R=SURRENDER NO R=H

> SPANISH21,S17 HOLE CARD BASIC STRATEGY

> DEALER HAND
> HAND4 5 6 7 8 9 1011 1213141516 17181920 AAA2A3A4A5
> 19 S S S S S S S S S S S S S S S S R S S S S S
> 18 S S S S S S S S S S S S S S S R R S S S S S
> 17 S S S S S S S S S S S S S S H R R S S S S S
> 16 S S S H H h h R S S S S S H H R R h h h S S
> 15 S S S H H H h h S S S S S H H h R h h h S S
> 14 S S S H H H h h S S S S S H H h R H H h S S
> 13 h h h H H H H h S S S S S H H h R H H H H h
> 12 h h h H H H H H h S S S S H H H R H H H H H
> 11 D D D D D D D H D D D D D H H H H D D D D D
> 10 D D D D D h H H D D D D D H H H H H D D D D
> 9 h h D H H H H H D D D D D H H H R H H H H H
> 8 H H H H H H H H h D D D D H H h R H H H H H
> 7 H H H H H H H H H h h h D H H h R H H H H H
> 6 H H H H H H H H H H h h h H H H R H H H H H
> 5 H H H H H H H H H H h h h H H H R H H H H H
> A9 S S S S S S S S S s s D D S S S S S S S S S
> A8 S S s S S S S S s D D D D S S S H S S S S S
> A7 D D D S S H H S D D D D D S H H h S S S S s
> A6 D D D H H H H H D D D D D H H H h H H H H H
> A5 h h D H H H H H D D D D D H H H h H H H H H
> A4 h h h H H H H H D D D D D H H H h H H H H H
> A3 H h h H H H H H D D D D D H H H H H H H H H
> A2 H h h H H H H H D D D D D H H H H H H H H H
> AA P P P P P P P P P P P P P P p p p P P P P P
> 1010S S S S S S S S S s s P P S S S S S S S S S
> 99 P P P S P P S S P P P P P S P P R S S S s s
> 88 P P P P P P p R P P P P P P P R R P P P P P
> 77 P P P P H H h h P P P P P P H h R H H P P P
> 66 P P P H H H H H P P P P P P H H R H H H H h
> 44 H h h H H H H H h d d d d H H h R H H H H H
> 33 P P P P P H H H P P P P P P P h R H H H H P
> 22 P P P P p H H H P P P P P P P H R H H H H P

> S=STAND H=HIT D=DOUBLE P=SPLIT R=SURRENDER NO R=H

> SPANISH21,H17 HOLE CARD BASIC

> DEALER HAND
> HAND4 5 6 7 8 9 1011 1213141516 17181920 AAA2A3A4A5A6
> 19 S S S S S S S S S S S S S S S S R S S S S S S
> 18 S S S S S S S S S S S S S S S R R S S S S S S
> 17 S S S S S S S S S S S S S S H R R S S S S S S
> 16 S S S H H H H R S S S S S H H R R H H S S S H
> 15 S S S H H H H H S S S S S H H H R H H S S S H
> 14 S S S H H H H H S S S S S H H H R H H H S S H
> 13 H H S H H H H H S S S S S H H H R H H H H H H
> 12 H H H H H H H H H S S S S H H H R H H H H H H
> 11 D D D D D D D H D D D D D H H H H D D D D D D
> 10 D D D D D H H H D D D D D H H H H D D D D D D
> 9 H H D H H H H H D D D D D H H H R H H H H H H
> 8 H H H H H H H H H D D D D H H H R H H H H H H
> 7 H H H H H H H H H H H H D H H H R H H H H H H
> 6 H H H H H H H H H H H H H H H H R H H H H H H
> 5 H H H H H H H H H H H H H H H H R H H H H H H
> A9 S S S S S S S S S S S D D S S S S S S S S S S
> A8 S S S S S S S S S D D D D S S S H S S S S S S
> A7 D D D S S H H S D D D D D S H H H H H H S H S
> A6 D D D H H H H H D D D D D H H H H H H H H H H
> A5 H D D H H H H H D D D D D H H H H H H H H H H
> A4 H H D H H H H H D D D D D H H H H H H H H H H
> A3 H H H H H H H H D D D D D H H H H H H H H H H
> A2 H H H H H H H H D D D D D H H H H H H H H H H
> AA P P P P P P P P P P P P P P P P P P P P P P P
> 1010S S S S S S S S S S S P P S S S S S S S S S S
> 99 P P P S P P S S P P P P P S P P R S S S S P S
> 88 P P P P P P P R P P P P P P P R R P P P P P P
> 77 P P P P H H H H P P P P P P H H R H H P P P P
> 66 P P P H H H H H P P P P P P H H R H H H H P H
> 44 H H H H H H H H H D D D D H H H R H H H H H H
> 33 P P P P P H H H P P P P P P P H R H H H H P H
> 22 P P P P P H H H P P P P P P P H R H H H H P H

> S=STAND H=HIT D=DOUBLE P=SPLIT R=SURRENDER NO R=H

> Comments 6D,H17,DDD as different from regular
> blackjack:

> 1. Spanish 21 basic strategy changes are
> 13-4H;13-5H;12-4H;12-5H;12-6H;8-5D;8-6D;7-6D;6-6D;5-6D;A8-6S;A3-4D;A2-4D;16-9H;16-10H;15-10H;14-10H;10-9H;22-8P.

> 2. 17-18H. EV for H is -.416.

> 17-11S. 17-AR is spanish 21 basic strategy. EV for S
> is -.452. EV for H is -.572.

> 16-11R. 16-AR is spanish 21 basic strategy. EV for H
> is -.526. EV for S is -.577.

> 15-11H. 15-AH is spanish 21 basic strategy. EV for H
> is -.487. EV for S is .-577.

> 14-11H and 13-11H. 14-AH and 13-AH is spanish 21 basic
> strategy.

> 3. 12-12H. EV for H is -.112. EV for S is -.148.

> 12-13S. EV for S is -.06. EV for H is -.065.

> 13-12S. EV for S is -.148. EV for H is -.183.

> 13-13S. EV for S is -.06. EV for H is -.143.

> 4. 7-12D;6-12D;5-12D. Dealer bust rates for 11 is
> 21.2%, for 12 is 42.6%, for 13 is 47.0%, for 14 is
> 51.1%, for 15 is 54.9%, for 16 is 58.3%.
> 7-6D;6-6D;5-6D are all basic strategy. In spanish 21
> it is possible to redouble, for example 7-12, dealt a
> 4, and then redouble is correct. This is not available
> in regular blackjack.

> 5. A9-13S;A9-14S;1010-13S;1010-14S. The dealer bust
> rates in regular blackjack are higher for 13(52.0%)
> and 14(55.4%). EV for A9-13S,1010-13S is +.682. EV for
> D,P is +.587. EV for A9-14S,1010-14S is +.707. EV for
> D.P is +.695.

> 6. 15-19H. EV for His -.47. EV for H is -.543 if you
> don't H 17+.

> 16-19R. EV for H is -.511.

> 14-19H. EV for H is -.426. EV for H is -.511 if you
> don't H 17+.

> 13-19H. EV for H is -.378. Ev for H is -.473 if you
> don't H 17+.

> 12-19H. EV for H is -.329.

> 13-20R. EV for H is -.596.

> 12-20R. EV for H is -.562.

> 7. A8-20H. EV for H is -.485.

> A7-20H. EV for H is -.461.

> 8. AA-18;AA-19;AA-20. In spanish 21 you can resplit
> and hit split aces, which encourages the split.

> 9. 16-AAH;16-A@H;15-AAH;15-A2H;14-A2H;14-A3H;13-A5H.
> Spanish 21 dealer bust rates are
> AA(22.0%),A2(24.6%),A3(27.2%),A4(29.0%),A5(32.7%), A6(21.2%).
> Regular blackjack dealer bust rates are
> AA(26.7%),A2(29.3%),A3(31.9%),A4(34.5%),A5(37.0%), A6(21.2%).
> So in spanish 21 the delaer busts less than regular
> blackjack. R is better than S for AA and A2 because
> the bust rate is less than 25%.

> 10. 9-A5D. Spanish 21 basic strategy is 9-3D with
> dealer bust rate of 33.8%. A5 bust rate is 32.7%. 9-2H
> is basic strategy instead of D when the bust rate is
> 31.9%. 9-A5D is regular blackjack basic strategy for
> 2D,H17,DAS,RSA but is H for 6D. In spanish 21 you can
> double 9 if dealt a 2.

> 11. A7-A5H. A7-3S is basic strategy with dealer bus t
> rate of 33.8%. A5 bust rate is 32.7%.

> 12. 99-A3S;99-A4S. 99-2S is basic strategy with bust
> rate of 31.9%. A3(27.2%) and A4(29.9%0 bust rates are
> less.

> 13. 66-A4H. 66-3H is basic strategy with a bust rate
> of 33.8%. A4(29.9%) is less.

> 14. 8-19H. EV for H is -.358.

> 15. 22-20R EV for H is -.54.

> 16. 11-11H. EV for D is +.030.

> 17. A7-11S. EV is -.204.

> 18. 44-5D;44-6D is spanish 21 basic strategy instead
> of P as in regular blackjack.

> Comments 6D,S17 as different from regular blackjack:

> 1.
> 13-4H;13-5H;13-6H;12-4H;12-5H;12-6H;9-4H;9-5H;A5-4H;A5-5H;A4-4H;A4-5H;A4-6H;A3-5H;A3-6H;A2-5H;A2-6H;44-5H;44-6H;16-9H;16-10H;15-10H;15-AH;14-10H;14-AH;13-AH;10-9H;A7-AH;88-10P;77-10H;77-AH;22-8P
> are spanish 21 basic strategy decisions.

> 2. 9-12D;8-12H;7-13H;7-14H;
> 6-14H;6-15H,6-16H;5-14H;5-15H;5-16H. In the S17 game
> you can't redouble if a small card is dealt so the
> play is changed. EV for 9-12D is +.201. EV for H is
> +.161. EV for 8-12D is -.004. EV for 8-13D is +.237.
> EV for H is +.194. EV for 7-15H is +.335. EV for D is
> +.285. 7-16D EV is +.417. EV for H is +.390. 6-16H EV
> is +.416. EV for D is +.177.

> 3.
> 16-AAH;16-A2H;16-A3H;15-AAH;15-A2H;15-A3H;14-A3H;13-A5H.
> 16-AAH EV is -.49. The S17 dealer bust rates are
> AA(19.4%);A2(22.2%);A3(24.0%);A4(28.0%),A5(30.9%). It
> is better to R than to S against AA,A2,A3 because the
> bust rates are less than 25%.

> 4. A7-A5H. A7-3S is basic strategy with bust rate of
> 33.8%. A5 bust rate is 30.9%.

> 5. A2-12D. EV is +.201.

> A5-12D. EV is +.201. EV for H is +.150.

> A7-12D. EV for S is +.197

> A8-12S. EV is +.426. EV for D is +.393.

> A8-13D. EV is +.517. EV for H is +.470.

> 6. 99-A4S;99-A5S. Basic strategy is 99-2S with bust
> rate of 31.9%. A5(30.9%) and A4(28.0%) bust rates are
> less.

> 7. 66-A5H. Basic strategy is 66-3H with bust rate of
> 33.8%. A5(30.9%) bust rate is less.

> The above charts are best for the exposed card
> situation where the dealer just turns over her card
> for the table to see. In the hole card game,where the
> exposure is unknown to the dealer, you will probably
> modify the above charts in order to maintain the game.
> Are you really going to surrender 19-20R and like
> plays? It looks odd to hit hard 17 and above.

> Good luck.

I typed 9-A5D for the H17,DDD game. It should be 9-A5H. EV for D is -.03 for the H17 game and -.08 for the S17 game.

My charts are nicely aligned when I transmit them but get jumbled as the electrons tire along the way to Don's site.

It would be great to have someone else do analysis on these charts. I only created them because nobody else did and I was getting lots of exposed card situations. Then there were players who didn't want me to post the charts as it might help ruin their games. Since spanish 21 is getting harder as heat increases and as dealers get better at dealing it I felt it was okay to go ahead and post.

Lenny Frome did the pioneer work on the game with his basic strategy in 1996. The Wizard Of Odds built on Frome's work and perfected the basic strategy in 2001. Kat Walker did her landmark work in 2008 to create indices for the games. My charts are the only ones for hole cards.

Good luck.

[orster52]

> I typed 9-A5D for the H17,DDD game. It should be
> 9-A5H. EV for D is -.03 for the H17 game and -.08 for
> the S17 game.

> My charts are nicely aligned when I transmit them but
> get jumbled as the electrons tire along the way to
> Don's site.

> It would be great to have someone else do analysis on
> these charts. I only created them because nobody else
> did and I was getting lots of exposed card situations.
> Then there were players who didn't want me to post the
> charts as it might help ruin their games. Since
> spanish 21 is getting harder as heat increases and as
> dealers get better at dealing it I felt it was okay to
> go ahead and post.

> Lenny Frome did the pioneer work on the game with his
> basic strategy in 1996. The Wizard Of Odds built on
> Frome's work and perfected the basic strategy in 2001.
> Kat Walker did her landmark work in 2008 to create
> indices for the games. My charts are the only ones for
> hole cards.

> Good luck.

I typed 44-12h for the H17,DDD game. It should be 44-12D.

Good luck.

[bright eyes]

> I typed 44-12h for the H17,DDD game. It should be
> 44-12D.

> Good luck.
Your charts are not the only ones for sp21 hole card.Brock windsor posted charts 2-3months ago on Blackjack info.And some of us have had our own charts for years but chose not to share them.

[orster52]

> Your charts are not the only ones for sp21 hole
> card.Brock windsor posted charts 2-3months ago on
> Blackjack info.And some of us have had our own charts
> for years but chose not to share them.

A7-11H is correct in all my charts. I have A7-11S. EV for H is -.161 and EV for H is -.2037.

It is good to know there are other charts. I never found any or I wouldn't have crunched the numbers for mine. I'm usually too lazy to do the work.

Would you post about any errors in mine please?

Thanks. Good luck.

[Brock Windsor]

Orster52, Great stuff with the charts. Have you done any work on blackjack switch? Im really struggling to come up with a real-world switching HC strategy.
-BW

[orster52]

> Orster52, Great stuff with the charts. Have you done
> any work on blackjack switch? Im really struggling to
> come up with a real-world switching HC strategy.
> -BW

I haven't done anything with BJ switch. Switch isn't offered at enough places for me to get off my lazy keister and learn it. It also isn't offered in my state. Only .18% casino advantage is an enticement though. I want it to expand before I expend any effort.

I read you did hole card charts for spanish 21. If you see any errors in mine please post the corrections. Thanks.

[zoomie]

Here is a stupid question that will not go unasked: What is the use for the SP21 hole card charts?

[Brock Windsor]

I amended my charts to reflect yours. I was using a best guess approach based on BJ charts I have and some conversation with others. We had similar decision points though I wasn't splitting aces against pat hands, obviously an error. It makes me believe that in the joints that allow hitting split aces in BJ, one should split vs. dealer pat hands. The BJSwitch .18% is misleading, I doubt anyone has memorized a switching strategy that gets them inside 0.5%. Then for HC that strategy has to be amended for hole card knowledge. I think Ive misplayed hands vs a dealer 12 to the point I have no advantage, Im back to the drawing board on this game right now so any insight is appreciated.
-BW

> I haven't done anything with BJ switch. Switch isn't
> offered at enough places for me to get off my lazy
> keister and learn it. It also isn't offered in my
> state. Only .18% casino advantage is an enticement
> though. I want it to expand before I expend any
> effort.

> I read you did hole card charts for spanish 21. If you
> see any errors in mine please post the corrections.
> Thanks.

[orster52]

> Here is a stupid question that will not go unasked:
> What is the use for the SP21 hole card charts?

The hole card charts are used for when the dealer exposes her hole card before she is supposed to. You then have additional information that you can use to better play your hand.

[Mr. X]

Although an obvious rule of thumb is that BJ games with special options are better for the holecarder, BJ Switch is an exception. BJ Switch is a below average game for holecarders, imo.
No computer studies on my part, but experience and logic have opened my eyes to 'Switch' HC problems. IMO, you are exagerrating the frequency and value of HC info when it comes to the actual 'switch'.
3 problems that cause EV dilution for us in BJS:
1. Switching is overwhelmingly determined by the players 4 cards. Unfortunately,the dealers holecard rarely matters. I'd guess 1-2% of the time does the holecard change the switch decision, probably closer to 1%. Heck, maybe BELOW 1%.
2. The 'Dealer 22 ties' rule dilutes the value of staying on stiffs vs dealer high card stiffs, and that's a large chunk of your advangtage.
3. Switching turns a lot of hands where HC knowledge has value into nobrainers where HC knowledge does NOT have value. E.G., a player's 5, 10 and 10, 3 vs dealer 9 up 6 down. Without switching, staying on 15 and 13 vs 15 as opposed to hitting is worth about 50% and 40% of your unit, respectively (before the 'dealer 22 ties' dilution). But switching turns that into a 20 and an 8, where the holecard knowledge is of no value (unless the 8 turns stiff.)
If you want, this could be continued on that other site, where I'm known by a different name (in addition to 'lightweight')

[Brock Windsor]

In your example I would double the 8 and split the 10's, that hole card knowledge was valuable. The '22' ties rule is very problematic, it dilutes the value of aggressive splits and doubles as well as value of staying on stiffs, no doubt this is the biggest hurdle. I think the dealer hole card matters a great deal in the switch decision, not only in how often you create action against a dealer stiff, but also in breaking up losing pat hands so you can hit them without raising the pit's eye. For instance dealer has 9 up 10 down. Switch your 7-6, T8, for a 15 and 16 and hit them both. It won't raise attention like hitting an 18 would. I haven't had time to work on this game thoroughly, but it's in the project list.
-BW

> Although an obvious rule of thumb is that BJ games
> with special options are better for the holecarder, BJ
> Switch is an exception. BJ Switch is a below average
> game for holecarders, imo.
> No computer studies on my part, but experience and
> logic have opened my eyes to 'Switch' HC problems.
> IMO, you are exagerrating the frequency and value of
> HC info when it comes to the actual 'switch'.
> 3 problems that cause EV dilution for us in BJS:
> 1. Switching is overwhelmingly determined by the
> players 4 cards. Unfortunately,the dealers holecard
> rarely matters. I'd guess 1-2% of the time does the
> holecard change the switch decision, probably closer
> to 1%. Heck, maybe BELOW 1%.
> 2. The 'Dealer 22 ties' rule dilutes the value of
> staying on stiffs vs dealer high card stiffs, and
> that's a large chunk of your advangtage.
> 3. Switching turns a lot of hands where HC knowledge
> has value into nobrainers where HC knowledge does NOT
> have value. E.G., a player's 5, 10 and 10, 3 vs dealer
> 9 up 6 down. Without switching, staying on 15 and 13
> vs 15 as opposed to hitting is worth about 50% and 40%
> of your unit, respectively (before the 'dealer 22
> ties' dilution). But switching turns that into a 20
> and an 8, where the holecard knowledge is of no value
> (unless the 8 turns stiff.)
> If you want, this could be continued on that other
> site, where I'm known by a different name (in addition
> to 'lightweight')