Written from 7 named sources H17 Blackjack Basic Strategy Guide 6-deck shoe 3:2 blackjack Dealer hits soft 17 Double on any first two cards DAS Late surrender H17 Rules Primer In an H17 game, the dealer must hit any soft 17—a total of 17 that includes an Ace counted as 11, such as A-6. In an S17 game, the dealer stands on all 17s. That one rule change matters because soft 17 is a weak dealer result: forcing the dealer to draw again creates extra chances to improve that hand to 18, 19, 20, or 21. The dealer does bust a little more often as well, but the added improvements outweigh the added busts, so the net effect favors the house. Relative to otherwise identical S17 rules, H17 adds about 0.20% to 0.22% to the house edge [1][2]. In a 6-deck 3:2 shoe with double on any first two cards, doubling after split (DAS), and late surrender, perfect basic strategy typically leaves the house edge in the mid-0.5% range under H17, versus roughly the mid-0.3% to mid-0.4% range under S17, depending on the exact full rule mix [3]. Because the dealer’s final-total distribution changes, a few player decisions change too. The most important H17-specific deviations are double 11 vs. Ace, double A,7 vs. 2, and surrender 15 vs. Ace, hard 17 vs. Ace, and 8,8 vs. Ace when late surrender is available [5][6]. Those are small-looking differences, but they are precisely where using the right H17 chart saves expected value. Basic Strategy Chart Use the chart in this order: Surrender first if a surrender play is shown. If you have a pair and did not surrender, use the Pairs table. Otherwise use the Soft Totals table if an Ace counts as 11; use Hard Totals for all other hands. All surrender plays below are late-surrender decisions made only after the dealer does not have blackjack. Hard Totals Hard Total 2 3 4 5 6 7 8 9 10 A 5 H H H H H H H H H H 6 H H H H H H H H H H 7 H H H H H H H H H H 8 H H H H H H H H H H 9 H D D D D H H H H H 10 D D D D D D D D H H 11 D D D D D D D D D D 12 H H S S S H H H H H 13 S S S S S H H H H H 14 S S S S S H H H H H 15 S S S S S H H H Sur Sur 16 S S S S S H H Sur Sur Sur 17 S S S S S S S S S Sur 18 S S S S S S S S S S 19 S S S S S S S S S S 20 S S S S S S S S S S 21 S S S S S S S S S S Soft Totals Soft Total 2 3 4 5 6 7 8 9 10 A A,2 H H H D D H H H H H A,3 H H H D D H H H H H A,4 H H D D D H H H H H A,5 H H D D D H H H H H A,6 H D D D D H H H H H A,7 D D D D D S S H H H A,8 S S S S D S S S S S A,9 S S S S S S S S S S Pairs Pair 2 3 4 5 6 7 8 9 10 A 2,2 DS DS SP SP SP SP H H H H 3,3 DS DS SP SP SP SP H H H H 4,4 H H H DS DS H H H H H 5,5 D D D D D D D D H H 6,6 DS SP SP SP SP H H H H H 7,7 SP SP SP SP SP SP H H H H 8,8 SP SP SP SP SP SP SP SP SP Sur 9,9 SP SP SP SP SP S SP SP S S 10,10 S S S S S S S S S S A,A SP SP SP SP SP SP SP SP SP SP Legend H = Hit S = Stand D = Double SP = Split DS = Split because double after split is allowed; if DAS were not allowed in another game, hit instead Sur = Late surrender after the dealer checks for blackjack Most important H17 deviations built into this chart: 11 vs. A = D, A,7 vs. 2 = D, 15 vs. A = Sur, 17 vs. A = Sur, 8,8 vs. A = Sur [5][6]. Bankroll Management Table For longevity, think in betting units, not dollars. The RoR labels below are best used as practical risk bands for session planning rather than exact universal probabilities, because true risk of ruin also depends on your total bankroll, number of hands played, and how tightly you keep your bets flat. Risk of Ruin Level Recommended Buy-in (Units) Session Stop-Loss Session Win Goal Conservative (5% RoR) 100 -30 +20 Moderate (13% RoR) 50 -20 +15 Aggressive (40% RoR) 25 -15 +10 Pick a unit size before you sit down and keep it steady. For a basic-strategy player focused on longevity, flat betting is best, and a very tight 1-2 unit spread is the widest a non-counter should consider. Progressive systems such as Martingale or Paroli do not change the house edge; they simply compress normal variance into larger bets, making bankroll collapse and table-limit problems arrive much faster. Stop-losses and win goals do not improve expected value, but they do help preserve capital and prevent emotion-driven overbetting. Decision Logic FAQ Splitting 8s against a dealer 9, 10, or Ace Rule: Split 8,8 against 9 or 10; against Ace, late surrender if it is available, otherwise split. Why it works: A hard 16 is a terrible hand: if you hit it, you bust on the next card about 62% of the time, and if you stand, any dealer 17 or better beats you. Splitting converts one weak 16 into two separate 8-starting hands that can grow into 18, 19, 20, or 21. Against a dealer Ace in an H17 game, though, even that salvage play is slightly worse than locking in a fixed -0.5 unit with surrender, which is why 8,8 vs. A = Sur appears in the chart [6]. Never splitting 10s, even against a dealer 5 or 6 Rule: Never split 10,10; always stand on 20. Why it works: A player 20 is already one of the strongest hands in blackjack and wins well over 70% of the time against dealer 5 or 6. Splitting turns one premium made hand into two hands that start at 10, and many of those follow-up draws land on awkward 12-16 totals. The extra variance looks exciting, but the expected value is clearly worse than simply keeping the 20. Doubling 11 vs. Ace Rule: In this 6-deck H17 shoe game, double hard 11 against a dealer Ace. Why it works: Hard 11 is an excellent one-card hand: any 10-value card makes 21, and 7-9 make strong totals of 18-20; 10-value cards alone make up about 30.8% of the shoe. Under H17, the dealer’s Ace-up finishing frequencies shift just enough that taking exactly one card for an extra unit edges ahead of ordinary hitting, which is why this is one of the signature H17 deviations from many S17 charts [5]. Standing hard 12 vs. dealer 4, 5, or 6 Rule: Stand on hard 12 against dealer 4, 5, or 6. Why it works: If you hit 12, any 10-value card busts you immediately, which happens about 31% of the time. Dealer 4, 5, and 6 are classic bust upcards, with dealer bust rates roughly around 40% to 43% once the hand is played out. Standing lets the dealer’s weak position work for you instead of risking a self-inflicted bust. Hitting soft 18 (A,7) vs. dealer 9, 10, or Ace Rule: Hit A,7 against dealer 9, 10, or Ace; in H17, double it against 2 through 6. Why it works: Soft 18 feels strong, but against powerful dealer upcards it is often only good enough to tie or lose. The key is that a soft 18 gets one free hit: a single card cannot bust it, and A, 2, or 3 improve it to 19, 20, or 21. That no-bust first draw is worth more than passively standing and hoping 18 holds up against a strong dealer range. Using late surrender on 15 vs. 10 and 16 vs. 9, 10, or Ace Rule: Surrender hard 15 vs. 10 and hard 16 vs. 9, 10, or Ace; in this H17 chart, also surrender 15 vs. Ace and 17 vs. Ace. Why it works: These are some of the ugliest expectation spots in the game: if you play them out, the average loss is worse than the fixed -0.5 unit cost of surrender. Late surrender turns a very bad situation into a controlled, capped loss, which is exactly what a longevity-focused player wants. The H17 rule slightly strengthens dealer Ace-up hands, which is why the surrender list is a bit broader than on many S17 charts [6][7]. Basic strategy minimizes the house edge, but it does not eliminate it; over the long run, blackjack remains a negative-expectation game for non-advantage players. Set firm money and time limits before you play, never chase losses, and treat every session as paid entertainment. Sources [1] brew.cafecasino.lv — https://brew.cafecasino.lv/casino-games/h17-vs-s17-in-blackjack-which-one-is-better/ [2] wizardofvegas.com — https://wizardofvegas.com/forum/gambling/blackjack/2652-what-is-the-affect-on-house-edge-of-the-stand-on-all-17s-rule/ [3] blackjackincolor.com — https://www.blackjackincolor.com/penetration13.htm [5] casinocitytimes.com — https://www.casinocitytimes.com/henry-tamburin/article/doubling-11-against-an-ace-59197 [6] wizardofodds.com — https://wizardofodds.com/games/blackjack/surrender/ [7] 888casino.com — https://www.888casino.com/blog/blackjack-when-to-surrender reddit.com — https://www.reddit.com/r/blackjack/comments/vmokzk/s17_vs_h17/