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Blackjack reference library

Six-deck H17 blackjack

When the dealer hits soft 17, the dealer improves some hands and busts others; the net effect favors the house.

Reviewed by Casino Calculated Editorial TeamPublished September 21, 2026Last reviewed September 21, 2026
Bottom line: Compare complete packages: a good H17 game can still beat a poor S17 game if other rules differ.

Reference package

With 3:2 blackjack, DAS, no surrender, dealer peek, and the shared split assumptions, the cut-card house edge is 0.63873%. Adding late surrender lowers the matched profile to 0.55051%.

Strategy changes

H17 changes several borderline doubles and surrender decisions. On the site chart, choose H17 first and then match DAS and surrender.

Table check

  • H17 costs about 0.21 percentage point in the matched six-deck profiles
  • Late surrender partially offsets that cost
  • Never infer strategy from the payout placard alone
6D S176D H172D S172D H171D H176D ENHC
Rule-matched basic strategy

Six-deck H17 · DAS · late surrender

Total-dependent strategy for the complete package below. If one material rule differs, use a different chart.

Six decksDealer hits soft 17Blackjack pays 3:2Double on any first two cardsDouble after split allowedLate surrenderDealer peeks for blackjack
H HitS StandD Double; otherwise hitDs Double; otherwise standP SplitRh Surrender; otherwise hitRs Surrender; otherwise standRp Surrender; otherwise split

Hard totals

Player2345678910A
5–7HHHHHHHHHH
8HHHHHHHHHH
9HDDDDHHHHH
10DDDDDDDDHH
11DDDDDDDDDD
12HHSSSHHHHH
13SSSSSHHHHH
14SSSSSHHHHH
15SSSSSHHHRhRh
16SSSSSHHRhRhRh
17SSSSSSSSSRs
18+SSSSSSSSSS

Soft totals

Player2345678910A
A,2HHHDDHHHHH
A,3HHHDDHHHHH
A,4HHDDDHHHHH
A,5HHDDDHHHHH
A,6HDDDDHHHHH
A,7DsDsDsDsDsSSHHH
A,8SSSSDsSSSSS
A,9SSSSSSSSSS

Pairs

Player2345678910A
2,2PPPPPPHHHH
3,3PPPPPPHHHH
4,4HHHPPHHHHH
5,5DDDDDDDDHH
6,6PPPPPHHHHH
7,7PPPPPPHHHH
8,8PPPPPPPPPRp
9,9PPPPPSPPSS
10,10SSSSSSSSSS
A,APPPPPPPPPP

What to remember for this profile

  • Hard 11 doubles against an ace
  • Soft 18 doubles against 2–6
  • Soft 19 doubles against 6
  • Surrender 15, 17 and a pair of 8s against an ace

How the chart is chosen

For each player state and dealer upcard, compare the conditional expected value of every legal action over the remaining-card distribution. The chart selects the action with the greatest expected value under the stated deck count, dealer rule, doubling, splitting, surrender and dealer-blackjack procedure.

Scope: These are rule-matched, total-dependent starting-hand charts—not composition-dependent charts. Exceptions can occur in one- and two-deck play. Insurance and side bets are excluded.
All blackjack guidesOpen blackjack calculator
References

Wizard of Odds blackjack strategy calculator · Calculation methodology · Full sources directory

Method note

House-edge values and total-dependent strategy were cross-checked against the linked blackjack calculator and deck-specific basic-strategy references. Last reviewed September 21, 2026.