Exact Shoe Mode · six-deck companion
Blackjack Ledger
Rummy scenario
Best dealer up-card
Rummy
Insurance
777 Progressive Jackpot
GrandLast card
Fast entry
Choose rank, then suit
Recent cards
newest firstCurrent round
Dealer up-card
Enter the exposed card into the shoe first, then identify it here.
Illustrious 18 · Fab 4
Plays that change
Basic strategy assumes a random deck. The Illustrious 18 are the eighteen hands where that assumption is worth abandoning: each one has a true count — its index — past which the other play becomes correct. The Fab 4 are the same idea for surrender. Below the index you play basic strategy; at or past it you deviate. Insurance is the one that matters most, and the count is the only thing that tells you when.
All indices for this table
Indices that basic strategy already plays correctly at your rules are left out — at an H17 table, doubling 11 against an ace is not a deviation, it is just the play.
Fractional Kelly
What this count is worth
The dollar figure is part of Pro. The arithmetic below is not — it is the part worth understanding first. See Pro
Bankroll and table
Changing the deck count starts a new shoe — the count cannot carry across a different number of cards. Four, six and eight only: the strategy chart is the 4–8 deck chart, and single- or double-deck basic strategy is a genuinely different table.
Kept on this device only. Your bankroll is never sent to the server, never in a link, and never part of any analytics.
| Outcome | Chance it ever happens |
|---|---|
| Bankroll halves | — |
| Bankroll down to a quarter | — |
| Long-run growth vs full Kelly | — |
Half Kelly and 1.5× Kelly grow at the same rate. One halves your bankroll once in eight times, the other four times in five. That asymmetry is the whole argument for betting under Kelly, and it is what a fixed 1×–8× ramp hides.
Tiered side bet
Perfect Pairs
The three tiers never overlap. Combined EV uses the full 6:1 / 12:1 / 25:1 paytable.
Shoe compositionexact copies left
Table rules
Your paytables
Every edge on this page is priced against these numbers. Match them to the felt in front of you.
Perfect Pairs
—Any Pair
—Rummy
—Edges shown are off the top of a full shoe, so they describe the bet rather than this moment. Insurance is fixed at 2 : 1 by the rules of the game.
House rules Dealer hits soft 17 · Double any two, including after split · Split once · Split Aces receive one card, then stand · Up to three seats.
Informational simulator for a hypothetical game. It does not predict cards or guarantee outcomes.
Reference
Help
What each side bet actually isThe rules
- Pairs 11:1
- Your first two cards are the same rank. Suit and colour do not matter — two nines is two nines. One flat payout, win or lose.
- Perfect Pairs 6:1 / 12:1 / 25:1
- The same bet, paid in tiers by how alike the pair is. A mixed pair is two different colours (6:1), same colours is one colour but two suits — say both red (12:1), and a perfect pair is the identical suit (25:1). The panel prices all three separately, because the shoe runs out of matching suits faster than it runs out of matching ranks.
- Rummy 9:1
- Your two cards plus the dealer's up-card — three cards in total — must make one of three things: the same rank all round, the same suit all round, or three consecutive ranks in any order. Ace counts low for a run (A-2-3) and also completes A-Q-K. This is the only side bet whose odds depend on the dealer's card, which is why the panel asks for it and stays on Waiting until you enter one.
- Insurance 2:1
- Offered only when the dealer shows an ace, and it is a bet that the card underneath is a ten. It needs about a third of the shoe to be tens to break even, which is why the count decides it: the Illustrious 18 index is +3. Below that it is the worst bet on the table; at or above it is the most profitable play a counter has.
- 777 Progressive $1
- A fixed stake at a jackpot. This panel tracks only the Grand: the exact chance that the next three cards are all the seven of diamonds. It shows no EV, because the payout is a jackpot that changes and nothing here knows its size.
These are the payouts most tables post, and they are the defaults here — but tables differ, so set yours in the paytable panel. Every probability on the page is computed from the cards you have actually entered, not from a fresh shoe.
How to read Bonus PlaysEV guide
- Probability
- Your exact chance of winning with the cards currently left in the shoe.
- Line
- The break-even win rate. Below this number, the posted payout does not cover the losing bets.
- EV
- The long-run average profit or loss per $1 wagered. For example, −10.50% EV means an average loss of about 10.5¢ per $1 over many bets.
Worked example: Pairs at 7.458% is below its 8.333% line, producing −10.50% EV. Rummy at 9.564% is below its 10.000% line, producing −4.36% EV. Both correctly show Pass.
EV describes a long-run average—not what will happen on the next hand.
777 Progressive Jackpot: this card tracks only the exact Grand-hit chance of the next three cards being 7♦. It does not show EV because the jackpot amount changes.
Perfect Pairs: Mixed, Same Colors, and Perfect Pair are mutually exclusive. Its combined EV weights each exact probability by its 6:1, 12:1, or 25:1 payout, so it does not use one break-even line.
Reading the tablesHand notation
- Hard hand
- No ace, or an ace forced to count as 1. 10 + 7 is a hard 17 — draw a 9 and you are at 26. Bust.
- Soft hand
- Holds an ace still worth 11. A + 6 is a soft 17 — draw a 9 and the ace quietly drops to 1, leaving 16. One card cannot bust you.
- “11 vs A”
- Your total on the left, the dealer's one face-up card on the right. So hard 11 vs A means you hold something like 7 + 4 while the dealer shows an ace.
The confusing one: “dealer hits soft 17” is a rule about the dealer's hand, not yours. If the dealer's cards make a soft 17 — an ace and a six — the house rule says whether they must draw again or stand. Same phrase as your soft hands, different person holding the cards.
Why it changes your play: a dealer who draws to soft 17 is harder to beat, worth roughly 0.22% to the house. Six decisions shift because of it. Hard 11 against an ace is the clearest: when the dealer stands on soft 17 you simply hit, but when they draw you need a bigger hand to win, so doubling becomes the better bet.
This app's Strategy table lets you set the rule and recomputes every cell, so you are never reading a chart for someone else's game.
Running count and true countCounting guide
- Running count
- One number for the whole shoe. Every 2 through 6 adds +1, every 7 through 9 adds nothing, and every 10, J, Q, K or Ace subtracts 1. A fresh shoe starts at zero.
- Decks remaining
- The cards nobody has seen yet, divided by 52. This app knows it exactly, because it tracks the shoe card by card rather than estimating.
- True count
- Running count divided by decks remaining. This is the number that actually means something.
Why divide? A running count of +8 is not one situation. With six decks still to come it is a true count of +1.3 — barely anything, because those extra high cards are spread thin. With two decks left the same +8 is a true count of +4, a genuinely rich shoe. Identical running count, completely different game.
What a high count means: more tens and aces left over. That means more blackjacks — which pay 3:2 — more dealer busts, and better doubles. A negative count means the opposite, and the house edge quietly grows.
The true count is what bet sizing is built on, and what the handful of strategy deviations key off. It says how favourable the remaining cards are on average — it does not predict the next card, and it never makes a losing session impossible.
Responsible usePrivate practice · 18+
Blackjack Ledger is an educational probability simulator intended for private practice by adults 18 and older. Do not use it while participating in live real-money gambling.
It does not accept wagers, connect to casinos, predict future cards, provide financial advice, or guarantee winnings. Gambling involves risk and may result in financial loss. You are responsible for following applicable laws and casino rules.
Install on iPhoneWorks like an app
- Open Blackjack Ledger in Safari.
- Tap the Share button.
- Choose Add to Home Screen, then tap Add.
Open it once while online to save the offline app shell. Your shoe history remains on your device.