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Exact shoe · Action EV · Bet & risk

The shoe changes.
The math changes.
Your decision should too.

Real-time, composition-dependent blackjack decisions calculated from the exact remaining shoe.

Start Free Trial → See How It Works
Full functionality. No card required.
Exact Shoe
Every visible card tracked
Action EV
EV for every available action
4,608
Supported rule configurations
<1s
Decision calculation speed
What you get

From the exact shoe to the decision, bet and risk.

OddsOfBlackjack continuously recalculates the live game state as cards are dealt.

🃏
Exact Shoe Tracking
Every visible card updates the exact remaining shoe, so calculations reflect the cards actually left to be dealt — not a compressed count alone.
📊
EV for Every Action
See the Expected Value of every available action — Hit, Stand, Double, Split or Surrender — calculated from the current shoe.
🎯
Dynamic Strategy Guidance
Get the highest-EV action for the current game state. Decisions update as the shoe changes, with alerts for deviations and borderline decisions.
💰
Bankroll-Aware Bet Sizing
Bet guidance adapts to the current edge and bankroll to produce a disciplined wager recommendation.
⚖️
Risk & Variance
Track Risk of Ruin, variance and session risk as conditions change, with warnings when the current risk profile requires attention.
📈
Session Tracking
Track starting and ending bankroll, P&L, session history, peaks, drawdowns and performance over time.
How it works

From the first card to the next decision.

OOB continuously updates the exact shoe, action EVs, betting guidance and risk context as cards are dealt.

1
Configure the game
Select the table rules and enter your starting bankroll so OOB evaluates the exact game you are playing.
2
Enter every exposed card
Tap the cards as they are dealt. OOB updates the exact remaining shoe after every exposed card.
3
See the math update
Action EVs, highest-EV action, player edge, bet guidance and risk metrics recalculate as the shoe changes.
4
Act on the current state
Use the current recommendation for Hit, Stand, Double, Split or Surrender, together with the current betting and risk context.
Proof, not promises

Challenge the math. Reproduce the decision.

Every published OOB proof state includes the exact game rules, remaining shoe, action EVs and methodology needed to independently check the result.

Reproducible States
Inspect exact blackjack states with full rules, remaining-shoe composition, EV for every available action and the resulting highest-EV decision.
Explore the States →
Same True Count. Different Shoe.
Two shoes can share the same Hi-Lo True Count while having different exact compositions — producing different EVs and, in some cases, different optimal decisions.
See the Comparison →
1,000,000-Card Comparison
Static Basic Strategy and exact-shoe OOB decisions are compared state by state on the same card stream, measuring the cumulative Expected Value difference.
View the Experiment →
Technical Methodology & Validation
Read how the engine calculates decisions, how published states are validated and what each proof does — and does not — demonstrate.
Read the Methodology → View Validation →
Expected Value analysis describes mathematical expectation, not guaranteed financial results.
Supported game rules

4,608 rule configurations. One engine.

Configure OddsOfBlackjack to match the blackjack game you are actually playing.

The engine recalculates decisions using the selected rules together with the exact remaining shoe.

Decks
4 · 5 · 6 · 8
Dealer Soft 17
S17 / H17
Hole Card Rule
US Peek / ENHC
Double Rules
Configurable double restrictions
Double After Split
DAS Yes / No
Resplitting
Up to 2 / 3 / 4 hands
Split Aces
Resplit Aces: Yes / No
Hit Split Aces: Yes / No
Surrender
None / Late Surrender
Blackjack Payout
3:2 / 6:5

Together, these settings produce 4,608 supported rule configurations.

Rule settings can affect the available actions and Expected Value of a decision, so OOB evaluates the game using the configuration selected for that table.

Try the full product

Experience the complete OOB workflow
before you subscribe.

Configure the game, enter the cards and see action EVs, the highest-EV decision, betting guidance and risk context update from the exact remaining shoe — in real time.

Full functionality
Access the complete OOB workflow.
No card required
Start without entering payment details.
No commitment
Explore the product before choosing a subscription.
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OddsOfBlackjack provides mathematical decision support and does not guarantee wins or financial results.