Strategy question

[Reno Dude]

On the Blackjack Basic Strategy Chart link on this web site I put in 1 deck, H17, No DAS, No Surrender, Peek. I am a little confused as to why with the dealer showing a 10 it says to hit with 14 but with 7-7 it says to stand. Is this an error or is it correct?

 

[avs21]

On the Blackjack Basic Strategy Chart link on this web site I put in 1 deck, H17, No DAS, No Surrender, Peek. I am a little confused as to why with the dealer showing a 10 it says to hit with 14 but with 7-7 it says to stand. Is this an error or is it correct?

Its correct you stand on 7,7 vs 10 when playing SD.

 

[zengrifter]

Its correct you stand on 7,7 vs 10 when playing SD.

But if you do, you won't get 777. zg

 

[sabre]

On the Blackjack Basic Strategy Chart link on this web site I put in 1 deck, H17, No DAS, No Surrender, Peek. I am a little confused as to why with the dealer showing a 10 it says to hit with 14 but with 7-7 it says to stand. Is this an error or is it correct?

Basic strategy is the optimal way to play a hand off the top of a freshly shuffled deck (or shoe), taking into account that the dealer's upcard and your cards have been removed from play. There are often several combinations of cards that could make up your hand, and sometimes the optimal way to play your hand depends on the specific cards which make up your total. For example, in a multideck game, the optimal way to play a

T,2 vs 4 = HIT
9,3 vs 4 = STAND
8,4 vs 4 = STAND
7,5 vs 4 = STAND
6,2,4 vs 4 = STAND
5,3,4 vs 4 = STAND
5,2,5 vs 4 = STAND

To simplify things, basic strategy takes the overall best play given card frequency, and summarizes the above by saying, 12 vs 4 = STAND.

Regarding the total of 14 vs a dealer T in single deck, consider the following

8,6 v T
4/49 chance of drawing a 7 (giving 21)
3/49 chance of drawing a 6 (20)

7,7 v T
2/49 chance of drawing a 7 (21)
4/49 chance of drawing a 6 (20)


In the specific case of 7,7 vs T, two of the key cards we need to make a 21 have been removed from play. The removal of these two 7s (which are in your hand), make the expected return of hitting worse than standing. This is because the chance of reaching 21 on the next card has been so severely reduced (by 50%). In a 2+ deck game, the presence of additional 7s in the deck reduces the effect of removing two 7s in your hand. Thus you should only stand on 77 v T in a single deck game.

 

[Reno Dude]

Basic strategy is the optimal way to play a hand off the top of a freshly shuffled deck (or shoe), taking into account that the dealer's upcard and your cards have been removed from play. There are often several combinations of cards that could make up your hand, and sometimes the optimal way to play your hand depends on the specific cards which make up your total. For example, in a multideck game, the optimal way to play a

T,2 vs 4 = HIT
9,3 vs 4 = STAND
8,4 vs 4 = STAND
7,5 vs 4 = STAND
6,2,4 vs 4 = STAND
5,3,4 vs 4 = STAND
5,2,5 vs 4 = STAND

To simplify things, basic strategy takes the overall best play given card frequency, and summarizes the above by saying, 12 vs 4 = STAND.

Regarding the total of 14 vs a dealer T in single deck, consider the following

8,6 v T
4/49 chance of drawing a 7 (giving 21)
3/49 chance of drawing a 6 (20)

7,7 v T
2/49 chance of drawing a 7 (21)
4/49 chance of drawing a 6 (20)


In the specific case of 7,7 vs T, two of the key cards we need to make a 21 have been removed from play. The removal of these two 7s (which are in your hand), make the expected return of hitting worse than standing. This is because the chance of reaching 21 on the next card has been so severely reduced (by 50%). In a 2+ deck game, the presence of additional 7s in the deck reduces the effect of removing two 7s in your hand. Thus you should only stand on 77 v T in a single deck game.

Thank you. This makes sense.