Blackjack is the only casino game where your decisions change the outcome. The house edge against a basic-strategy player is roughly half a percent; against a gut-feel player it is two to four times that. The gap is not luck — it is a short list of correct plays.

The one number that drives everything

Your decision is not really about your total. It is about the dealer's upcard, because it predicts what the dealer will hold:

  • Dealer shows 2–6 (weak cards): the dealer busts often. Your job is to not bust first — stand on stiff totals and let the dealer explode.
  • Dealer shows 7–A (strong cards): the dealer usually makes 17+. Standing on 16 here is paying to lose slowly. Hit the ugly totals and try to improve.

This one split — weak dealer versus strong dealer — generates most of basic strategy on its own.

The plays that matter most

If you memorise only five rules, make them these:

  • Always hit 8 or less; always stand on hard 17 or more.
  • With 12–16: stand against a dealer 2–6, hit against 7–A.
  • Always split Aces and 8s. Never split 10s, and never split 5s (they play best as a 10).
  • Double down on 11 against any dealer card (in this game, dealer stands on 17, so the odds favour it).
  • Never take insurance. Ever. It is a side bet with a bad price.

Everything else is refinement. These five cover the hands where new players bleed the most chips.

The bankroll is part of the strategy

With a 100-chip bankroll, bet sizing matters as much as play quality:

  • Bet 2–5% of your stack per hand. At 100 chips that means 2–5 per hand, not 25.
  • Variance is brutal in blackjack: even perfect play produces losing streaks of six or seven hands. Small bets keep you alive through them.
  • Set a stop-loss before you sit down. Leaving at minus 40 is a strategy; leaving at zero is a story.
Basic strategy does not promise winning sessions. It promises that when the math arrives, you are the one collecting it.

Why the dealer standing on 17 matters

Dealer-stands-on-17 is the player-friendly rule. It removes the dealer's chance to improve a 17, which raises the bust frequency on those weak upcards (2–6). That is exactly why the stand-on-stiff rule works: you are not playing to beat 20, you are playing to be still standing when the weak-card dealer goes over 21.