single deck blackjack decisions

[RoyalFlush]

With 6+ decks hard 9 vs 2 is just a hit instead of a double.

It looks like that changes in single deck although some single deck tables only allow doubling on 10 and 11.


1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 9 vs Dealer's up card of 2

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 25,347
Final Balance: $49,890
Net Profit/Loss: $48,890

Alternative Action: Double/Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 24,827
Final Balance: $66,860
Net Profit/Loss: $65,860

[RoyalFlush]

I saw a chart that says 7, 7 vs T becomes stand instead of hit but our simulator says otherwise:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 77 vs Dealer's up card of T

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 9,663
Final Balance: -$272,360
Net Profit/Loss: -$273,360

Alternative Action: Stand
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 10,636
Final Balance: -$286,280
Net Profit/Loss: -$287,280

[RoyalFlush]

Our sim doesn't confirm changing 4, 4 from hit to double vs 6:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 44 vs Dealer's up card of 6

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 26,995
Final Balance: $75,220
Net Profit/Loss: $74,220

Alternative Action: Double/Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 25,279
Final Balance: $68,180
Net Profit/Loss: $67,180

[RoyalFlush]

Can't confirm it vs 5 either:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 44 vs Dealer's up card of 5

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 26,312
Final Balance: $62,870
Net Profit/Loss: $61,870

Alternative Action: Double/Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 24,864
Final Balance: $54,960
Net Profit/Loss: $53,960

[RoyalFlush]

We can confirm that 2, 2 vs 3 becomes a split:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 22 vs Dealer's up card of 3

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 22,271
Final Balance: -$33,910
Net Profit/Loss: -$34,910

Alternative Action: Split
Starting cash $1,000, starting bet $10
After 104,187 hands played, these are the results:
Games Won: 47,431
Final Balance: $28,200
Net Profit/Loss: $27,200

[RoyalFlush]

Can't confirm doubling A, 8 vs 6:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of A8 vs Dealer's up card of 6

Default Action: Double/Stand
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 29,688
Final Balance: $258,600
Net Profit/Loss: $257,600

Alternative Action: Stand
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 36,277
Final Balance: $282,920
Net Profit/Loss: $281,920

[RoyalFlush]

Can't confirm doubling A, 7 vs 2 either:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of A7 vs Dealer's up card of 2

Default Action: Double/Stand
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 24,335
Final Balance: $54,280
Net Profit/Loss: $53,280

Alternative Action: Stand
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 24,478
Final Balance: $58,700
Net Profit/Loss: $57,700

[RoyalFlush]

Doubling A, 2 vs 4 is confirmed:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of A2 vs Dealer's up card of 4

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 26,559
Final Balance: $57,650
Net Profit/Loss: $56,650

Alternative Action: Double/Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 25,411
Final Balance: $64,020
Net Profit/Loss: $63,020

[RoyalFlush]

Doubling A, 3 vs 4 is confirmed as well:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of A3 vs Dealer's up card of 4

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 26,003
Final Balance: $42,940
Net Profit/Loss: $41,940

Alternative Action: Double/Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 25,202
Final Balance: $47,320
Net Profit/Loss: $46,320

[RoyalFlush]

Confirmed that 6, 6 vs 2 becomes a split:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 66 vs Dealer's up card of 2

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 17,732
Final Balance: -$122,940
Net Profit/Loss: -$123,940

Alternative Action: Split
Starting cash $1,000, starting bet $10
After 104,198 hands played, these are the results:
Games Won: 44,646
Final Balance: -$110,960
Net Profit/Loss: -$111,960

[RoyalFlush]

Can't confirm that doubling hard 8 is good:
1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 8 vs Dealer's up card of 6

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 26,565
Final Balance: $65,550
Net Profit/Loss: $64,550

Alternative Action: Double
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 25,326
Final Balance: $57,810
Net Profit/Loss: $56,810

[RoyalFlush]

#1 Confirmed change from 6+ deck. A, 3 vs 4 becomes a double instead of a hit:

1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of A3 vs Dealer's up card of 4

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 26,044
Final Balance: $42,840
Net Profit/Loss: $41,840

Alternative Action: Double
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 25,252
Final Balance: $50,600
Net Profit/Loss: $49,600


#2 Confirmed change from 6+ deck. A, 2 vs 4 becomes a double instead of a hit:

1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of A2 vs Dealer's up card of 4

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 26,389
Final Balance: $53,890
Net Profit/Loss: $52,890

Alternative Action: Double
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 25,521
Final Balance: $67,540
Net Profit/Loss: $66,540

#3 Confirmed change from 6+ deck. Hard 9 vs 2 becomes a double instead of a hit:

1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 9 vs Dealer's up card of 2

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 25,337
Final Balance: $50,010
Net Profit/Loss: $49,010

Alternative Action: Double
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 24,686
Final Balance: $63,700
Net Profit/Loss: $62,700

#4 Confirmed change from 6+ deck. 2, 2 vs 3 becomes a split instead of a hit:

1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 22 vs Dealer's up card of 3

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 22,295
Final Balance: -$33,390
Net Profit/Loss: -$34,390

Alternative Action: Split
Starting cash $1,000, starting bet $10
After 104,207 hands played, these are the results:
Games Won: 47,576
Final Balance: $29,070
Net Profit/Loss: $28,070

#5 Confirmed change from 6+ deck. 6, 6 vs 2 becomes a split instead of a hit:

1 deck, double not allowed after split, dealer hits on soft 17
Testing the Player's Hand of 66 vs Dealer's up card of 2

Default Action: Hit
Starting cash $1,000, starting bet $10
After 50,000 hands played, these are the results:
Games Won: 17,547
Final Balance: -$126,030
Net Profit/Loss: -$127,030

Alternative Action: Split
Starting cash $1,000, starting bet $10
After 104,219 hands played, these are the results:
Games Won: 44,761
Final Balance: -$111,310
Net Profit/Loss: -$112,310