In between sidebet bj

I ran into a new sidebet in a blackjack game and was wondering what the house edge was. In addition to the house edge what would be the optimum count have to be to lessen the edge and gain an advantage if there is one. You put out a sidebet of 1-50 dollars per hand betting that the dealer's up card is between your two. If he matches yours it pays 30-1, if the one between 12-1, two between 6-1, three between 4-1 and finally any between 1-1. Any insight or help would be appreciated. Thanks

How many decks? May I ask where you saw it? I tend to think it isn't countable, but I can at least give the house edge if I know the number of decks.

Sounds like an adaptation of Red Dog (Acey Ducey).

But there are additional possibilities that need to be considered.

What if your two cards are consecutive? What if they are paired?

Is that dealer match payoff if they are paired, or not, or doesn't matter? It SHOULD matter, if you're paired and he matches, it should pay more than a match of either non-paired card.

I get an ev of -0.030797884962369 assuming 8 decks and me and excel are having a good day.

Event	Combinations	Probability	Pays	Return
trips	386880	0.005412956172516	30	0.16238868517548
1 spread	720896	0.010086275984652	12	0.12103531181583
2 spread	1310720	0.018338683608458	6	0.11003210165075
3 spread	1769472	0.024757222871419	4	0.099028891485675
4+ spread	14942208	0.20906099313643	1	0.20906099313643
loser	52342784	0.73234386822653	-1	-0.73234386822653
Total	71472960	1		-0.030797884962369

This and other side bets can be found in my google docs side bets

Hi, in response to your query it's 8decks with the ace high. I would prefer not to mention the casino if you don't mind. I would gladly send you the location if you pm me if that's possible. Thanks.

I agree with miplet's results. I just added my own analysis to my blackjack appendix 8.

Why dont you want to mention it? I know side bets are sucker bets but it seems like a fun bet to make, is there even private messaging on this site?