Blackjack Basic Strategy
Enter your hand and the dealer's upcard to get the mathematically correct basic-strategy play, with the reasoning behind it.
Your hand
Correct play
Basic strategy says
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Basic strategy reduces the house edge to roughly 0.5% under common rules; it does not remove it. Results assume the dealer stands on soft 17 and that doubling after a split is allowed. No betting system overcomes a negative expectation.