Double Exposure Blackjack

Double Exposure deals both of the dealer’s cards face up. You know exactly what you are playing against on every hand, which sounds like it should end the argument in the player’s favour. It does not, and the way the casino claws it back is one of the most elegant pieces of design in the 21 family.

Play Double Exposure free

The game at the top of this page is our own practice table, dealing both dealer cards face up on practice credits in your browser. No account, no download. Because there is no hidden card, correct play here is not a chart to memorise: it can be worked out exactly from the dealer’s hand. We wrote a solver that does precisely that, and the book coach beside the table uses it to grade every decision you make.

What you give up for seeing both cards

Two rules pay for the information, and between them they are worth more than most players expect:

• The dealer wins ties. Every push becomes a loss, apart from tied blackjacks in most versions. Ties are common, so this is the heavier of the two rules by a distance.
• Blackjack pays even money. Not 3:2, which on an ordinary table would cost the player over 2% by itself.

Most versions also restrict doubling to totals of 9, 10 and 11, allow only one split, and have the dealer hit soft 17. That doubling restriction is not incidental: when you can see the dealer’s hand, unrestricted doubling would be worth so much that the game would stop being profitable for the casino, so the rule exists to take the edge back.

For the exact ruleset our table deals, and playing every hand the way our solver says to, we measure the house edge at about 1.2% over six million simulated hands. Seeing the dealer’s cards is emphatically not a free lunch: this is a more expensive game than an ordinary blackjack table, not a cheaper one. Published figures for Double Exposure vary a lot because the rules vary a lot, so treat any single number, including ours, as belonging to one specific rule set rather than to the game in general.

Strategy: throw away the chart

This is the variant where a standard basic strategy chart does the most damage, because the chart exists to guess what a hidden card might be, and here there is nothing to guess. When you can see a dealer 20, hitting a hard 17 is correct, because standing loses with certainty and drawing at least has a chance. When the dealer shows a made 13 through 16, you stand on almost everything, because the dealer is obliged to draw and will often bust without your help.

Both plays feel wrong. Both are right, and they illustrate the whole game: your decisions stop being about probability distributions and start being about a known, fixed target. The pattern that follows is the one most players never learn: against a dealer stiff total of 12 to 16 you stand on everything, even a 5, because your only route to winning is the dealer busting and drawing can only bust you first. Against a made dealer hand you keep hitting until you beat it, because a tie loses.

Unser Strategie-Motor models hidden-dealer blackjack and cannot price a face-up game, which is why the coach on this page runs a separate solver instead. Switch it on and play a few hands; it is a faster way to internalise those two rules than any chart.

Which version you are playing matters

Double Exposure varies more between operators than most variants, and the differences are large: whether a tied blackjack pays you or pushes, whether blackjack pays even money or is worth nothing extra at all, and how tightly doubling is restricted. Those three lines move the house edge by more than the deck count ever will, so read the paytable before the first hand rather than after.

If the appeal is knowing what the dealer holds, it is worth knowing that the same idea appears in land-based casinos as Face Up 21, with the same trade of information for payouts.

Sourcing note: no provider demo for Double Exposure is publicly available, so the rules above describe the format as commonly implemented rather than one operator’s version, and they are the rules our own table deals. The house edge quoted here is ours: computed by solving the game and simulating it, not taken from a third party. Confirm the specific rules of any version you play for money, because as noted above they move the price more than anything else about the game.