House Edge with Doubling on 8, 9, 10 & 11

The casino I play at has double deck with doubling only on 8, 9, 10 & 11. Dealer hits soft 17, double after splits allowed, no surrender, dealer peeks for blackjack, split up to 4 hands, one card on splitting Aces, no resplitting Aces. I've only seen the house edge calculated for doubling 9, 10 & 11- not when doubling is allowed on 8. What is the house edge? Also, does basic strategy say to double 8 against the dealer's 6? That seems to be the only time you would consider doubling on 8. Thanks. Randy

Hi Randy. Doubling the 8 will help a little. Unless you're counting cards, you should not ever double a hard 8. But you should double Ace & 7 hands against a 2 through 6.

The edge on your game is somewhere between .65% (all your rules & doubling any 2 cards) and .75% (doubling 9,10,11 only). I think it's a little closer to the .75% end - maybe .72% or so.

Quote: rdw4potus

Hi Randy. Doubling the 8 will help a little. Unless you're counting cards, you should not ever double a hard 8.

What the casinos that only allow doubling 8,9,10, and 11 is taking away is doubling on soft 13, 14, 15, and 17 against dealer 4, 5, and 6.

Thanks rdw4potus. Ken Smith's strategy engine shows the house edge with my rules but doubling only on 9, 10 & 11 at .51%. So I assumed that doubling on 8 if correct against a 6 would lower this slightly. There is no doubling on any 2 cards. Remember this is 2 decks. Would doubling 8 against 6 be incorrect basic strategy with these rules and decks?

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