Re: Worst blackjack player you\'ve ever seen?
doubling 7 on ANY dealer upcard using ANY number of decks is not profitable. a starting hand of hard 7 in any blackjack game is extremely marginal, and doubling (regardless of upcard or table conditions) would be solidly -EV in the long run.
however, I did have to look at the charts in BJA3 to confirm this, so I admit your theory seemed somewhat intuitive to start. unfortunately, it doesn't hold up.
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