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Exact shoe · Action EV · Bet sizing

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

Compare the calculated EV of available actions from the cards and table rules you enter. See the highest-EV action under OOB’s documented model.

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No card required. Access is activated manually after review.
Exact Shoe
Rank-by-rank composition from the cards you record
Action EV
Compare the available actions
4,608
Selectable rule combinations
2 bet rules
Graduated · Selective

From the cards you enter to the decision you can compare.

Record exposed cards and compare action EVs as the game state updates.

🃏
Exact Shoe Tracking
Every exposed card you record updates the remaining count of each rank. The calculations use that recorded composition, not a count alone.
📊
EV for Available Actions
Compare the calculated EV of Hit, Stand, Double, Split and Surrender when available, per original bet and including any additional wager.
🎯
The Highest Calculated EV
See which available action the model ranks highest for the current state. A highest-EV action can still lose.
💰
Graduated or Selective
Choose the initial bet-sizing rule. The suggestion uses the estimated pre-bet EV and the balance you confirm; it is fixed for the round.
🔢
Hi-Lo for Reference
See the Hi-Lo True Count alongside the composition-dependent analysis. It is a reference metric, not the sole input to the decision.
📈
Session History
Review saved session dates, deck count, starting bet, starting and ending balances, and the result you record. This is a history of your entries, not a forecast or a risk estimate.

Risk of Ruin and variance are explained in Learn. OOB does not currently calculate these estimates for your play. See the Methodology for what the model covers.

From the first card to the next decision.

Set the rules, record the cards, and compare the calculations as the state updates.

1
Configure the game
Select the table rules, choose Graduated or Selective, and confirm the balance used for the initial bet suggestion.
2
Record the exposed cards
Enter each visible card to update the remaining rank counts. The result depends on the accuracy of your entries.
3
Compare action EVs
See the calculated EV of the available actions and the action the model ranks highest.
4
Keep decisions and stakes distinct
The initial bet is fixed for the round. Action recommendations can update as cards are recorded; a new policy or confirmed balance applies to the next round.

Read the step-by-step guide →

Inspect the state. Understand the method. Compare the result.

Published records identify the rules, remaining composition, action EVs and the build used. Read each record with its stated scope and limitations. The public documentation does not by itself allow every production value to be reconstructed in full.

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
OOB decisions with the Graduated and Selective bet rules, and Basic Strategy with a flat bet, over two simulated tracks of 1,000,001 cards from the same shuffles. Fixed $10 unit; simulated, not a forecast or guarantee.
View the Experiment →
Technical Methodology & Validation
Read how the model calculates action EVs, what the internal checks cover, and what the published evidence does — and does not — establish.
Expected Value analysis describes mathematical expectation, not guaranteed financial results.

Your table rules. One decision workflow.

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

These selectable settings form 4,608 combinations. Availability in the selector is not a claim that every combination has been mathematically validated. Published checks cover the rules, states and builds identified in the Validation Register.

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. What each rule means →

Try the workflow
before choosing a plan.

Request trial access to configure the game, record cards, compare action EVs and explore Graduated or Selective bet sizing. Trial access is reviewed and activated manually. No card is required, and it never becomes a paid plan automatically.

Available features
Explore the features currently offered in the application.
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Trial access ends unless another access period is granted or purchased explicitly.
OddsOfBlackjack provides mathematical decision support and does not guarantee wins or financial results.