I recently rediscovered a silly little handheld game (of the sort that would have been advanced in about 1991, though I acquired it - I forget how - only a few years ago) called “Casino Ace - 7in1”. Playing around with the Blackjack game, I noticed some unusual things about it (so unusual that the usual online Blackjack calculators are of limited use) that I think may tilt the odds in the player’s favour. If I lay out the parameters below, perhaps someone can tell me if this is indeed the case, and if so, what the modifications to normal basic strategy should be to maximise this? If I’m right, I assume this was done deliberately, because players would rather win more of the time than lose, but they’ve kept it close enough to real life that you wouldn’t immediately notice anything amiss. On the other hand, one could argue that this is the wrong approach for what is essentially a toy, as it could give kids the wrong idea about gambling. Anyway, I’m not really here for a moral debate, here are the parameters:
Single deck, shuffle after around 42 cards have been dealt (see spoiler box below).
No splitting, ever.
Double only on 11.
Dealer stands on soft 17.
Insurance available against Ace only.
Blackjack pays 2:1.
Player Blackjack wins against any dealer upcard (the program does not check the other card).
Player with 5 cards totalling 21 or less wins against any dealer upcard (the program does not check the other card).
Dealer hand with 5 cards totalling 21 or less wins against any live player hand (so everything except a Blackjack).
My intuition is that the biggest factor here is Blackjack paying 2:1 - I don’t think any of the other factors that go in favour of the dealer are enough to outweigh this (the splitting and doubling restrictions, basically).
Perhaps the biggest change to basic strategy is if you as the player have accumulated 4 cards totalling 11 or less, you can always hit for a 100% guaranteed win on the fifth card. So even if you have A-2-3-4 (for a total of soft 20) against a dealer 6, you should hit again, which is quite a radical departure (I don’t think the program lets you hit if you get to soft 21). On the other hand it is disappointing if you double on 11 against a dealer 2, get a 10 for a 21, and then see the dealer get to 14 in 5 cards which beats you :).
Here are a few test deals showing each hand and the cumulative total of cards used before the program displays its ‘shuffle’ animation. As you can see, it seems slightly inconsistent - I can only assume the program knows what cards are coming next and its cut off for shuffling is based on that somehow, as opposed to a more naive system.
1 6
2 12
3 17
4 22
5 27
6 32
7 36
8 42
1 5
2 9
3 15
4 20
5 26
6 30
7 35
8 39
9 46
1 7
2 13
3 18
4 23
5 30
6 36
7 42
8 47
1 5
2 12
3 18
4 23
5 29
6 34
7 41
1 6
2 14
3 19
4 25
5 31
6 36
7 42
1 5
2 10
3 14
4 21
5 27
6 32
7 37
8 42
Any thoughts, card sharps?