The owner of the club I play at randomly decided he wanted to deal his own blackjack tables for a while and also decided to offer 10-1 on blackjacks. Off the top of your head what do you think the player edge for this game is? 20%? More?

Off top of my head, I'd guess 3.5% over the game you were playing.

Lol guess I was way off I thought I remembered reading that most of the players equity came from hitting blackjacks. Figured it would have a bigger impact.

10-1 blackjack if offered in a fair game is a huge effect.

Getting a blackjack occurs roughly 1 in 21. So on average, every 21 hands you now get 10 units instead of 1.5. So you will typically gain 8.5 units more than normal every 21 hands.

So if the original house edge is 1%, you would be expected to lose 0.21 units over 21 hands

With a 10-1 blackjack, you would now gain 8.5 - 0.21 = 8.29 units over 21 hands. This yields a player advantage of: 8.29/21 = 39.5%

tring can I just say that I hate you. That is all

This looks about right as an approximation. Blackjacks do tie now and then and we're rounding but think it's in the neighborhood (though any time anything is different than SW I assume I'm missing something).

Would be interesting to see how much a guy could get away with altering the game to still make this a more intuitively popular choice. Spanish 21 decks, ties lose, dealer 22 pushes, all the common restrictions on splits and doubles, every other negative set-up you can think of, and you've still got to think the casual player is going to enjoy that 10-1 (or even 5-1 or whatever to put it in line with what they can do w/ their rules and get what they want). Not saying this is what the owner has done but it's my first though.

True, my quick bastard math makes the assumption that tied BJs win, but the numbers are still close. Noting ties with dealer, that would lower the player advantage to 37.7% in a 6-deck game that normally would have a 1% edge.

Ties lose and dealer pushing 22 would reclaim 15.77% of the edge back.
http://wizardofodds.com/games/blackj...le-variations/

Blackjacks paying 2:1 yield a small but significant advantage for the player.

where is this at?

are you sure it wasn't 10:1 on suited blackjacks?

Nah it was all, and it was just a one down never to be repeated offer (it's possible the owner was drunk)

The advantage over a six deck base game would be 43.1%.

Doing it for a down might even be pretty good sober business. Realistically speaking when he just springs it like that I mean how much does he really stand to lose? Reasonably priced advertisement/fun night for him.

average bet x .46 x number of spots per hand = quite a lot of money

So about half a day at two other tables with typical rules against typical players. It's not exactly a Super Bowl commercial.