About Blackjack
Basic strategy is the mathematically optimal move for every possible (your hand, dealer up-card) situation in blackjack. Memorizing it drops the house edge from around 5% to around 0.5%. This drill focuses on the cells players actually get wrong — not the obvious ones.
Rules assumed
- Dealer stands on soft 17 (S17)
- Double after split allowed (DAS)
- No surrender
These match the common rule set at most casinos. Strategy changes slightly under different rules — a few cells flip.
How to use it
- The app shows a dealer up-card and your two cards. The label tells you what you have:
hard 16,soft 18,pair of 8s, etc. - Pick the best action: Hit / Stand / Double / Split.
- The card flashes green if correct, red if not. Below the card, the strategy rule that determines the right play is explained in one line — the reasoning, not just the answer.
- Tap Next hand to draw a new scenario.
What you're actually drilling
The deck skips the easy cells — hard 17+ always stand, AA always split, hard ≤ 8 always hit, hard 13-16 vs 2-6 always stand — and only shows you the cells where players make real mistakes:
- Soft hand doubling (A2 through A7)
- Soft 18 — every dealer column has a different answer
- Hard 9 / 10 / 11 doubling — especially hard 11 vs A under S17
- Hard 12 vs 2 / 3 / 4 — counterintuitive hit-or-stand line
- Hard 15 / 16 vs 9 / 10 / A — the painful must-hit cells
- Pair edge cases — 9s vs 7 stands, 4s/6s with DAS, matching 7s
Cells to drill
The Account page surfaces your 5 worst-performing cells (≥3 attempts, sorted by accuracy). That's your real practice list — focus there.
Streak
A day counts toward your streak when you play at least 10 hands. Calendar and accuracy history live on the Account page.