Single Deck Standard Blackjack — Rules, RTP & Strategy

What is Single Deck Standard Blackjack?

Single Deck Standard refers to the classical 1-deck, S17, full peek, no-DAS, 3:2-payout ruleset cataloged in Peter Griffin's The Theory of Blackjack. It's the baseline against which every modern variant is measured. The single-deck shoe gives the player two structural advantages: blackjacks appear ~0.5 pt more frequently than at 8 decks, and the player can use Hi-Lo / similar counting with extreme penetration. With basic strategy alone the house edge is essentially zero or slightly negative — meaning a perfect-strategy player breaks even or wins.

Why single deck is so strong

• Blackjack frequency: single deck has ~4.83% BJ rate vs ~4.75% for 8 decks. With 3:2 payout, that extra 0.08% of BJs is worth ~0.13 pt RTP.
• Cards are not independent in single deck — drawing a 10 measurably depletes 10s for the rest of the deal. Basic strategy already accounts for this; counting amplifies it.
• Penetration is very high — even a 4-hand cut burn leaves ~60% of the deck still in play. A counter can sit out unfavourable counts and bet up favourable ones.
• Almost no casino still spreads true 1-deck S17 3:2. Common substitutes (6:5 BJ payout, H17, no surrender) blow the house edge back up to 1%+.

Strategy notes

Single-deck basic strategy differs from multi-deck in a few specific spots:

• Double down hard 8 vs dealer 5-6 (multi-deck just hits).
• Double down 11 vs dealer A (multi-deck hits).
• Split 2-2 / 3-3 vs dealer 2-3 (DAS-conditional in multi-deck; always split here).
• Stand on hard 12 vs dealer 4 (multi-deck stands on 13 vs 4).

House edge breakdown

Single Deck Standard sits at -0.03% house edge per EV Solver — i.e. a +0.03% player advantage with basic strategy. Compared to Evolution Classic 8-deck (0.71% HE / 99.29% RTP), single deck saves the player about 0.74 pt. The biggest single contributor is the deck count itself (~0.55 pt from 8→1), with the rest from BJ frequency and dependent-card effects. The reason this game is essentially extinct: counters could grind it for $100+/hr at $25 minimums, and even non-counters break even — bad business for the house. Modern 'single deck' offerings almost always pay 6:5 on blackjack, which alone adds ~1.4 pt to the house edge and erases the entire advantage.