Live Blackjack
How a Live Blackjack result is derived, step by step. Every step is public and can be reproduced from the seeds.
Derivation
- 01
Live Blackjack does not use your seed pair: one deal is shared by all players. When a round opens the server draws a 64-character seed for it and shows its SHA-256 before any bet is taken.
- 02
The round's byte stream is the documented one, keyed by that seed: block i = HMAC-SHA256(key = the seed as text, message = "<round id>:0:<i>").
- 03
Build 312 cards (6 × 52), Fisher–Yates with floats 0 … 310.
- 04
The hand is the first and second card of the shoe, then the third, fourth, fifth … for as long as anyone hits.
- 05
The dealer is dealt from the other end: the last card of the shoe face up, the one before it face down, then backwards from there to 17. So the dealer's cards do not depend on how many cards the table took.
- 06
When the round is done its seed is published: check that its SHA-256 is the hash that was shown, and lay the shoe out again.
float(k) and the rest of the notation are defined in the byte stream.
Run these steps on a bet of your own, in your browser.
Open the verifierRules that fix the payout
Every player is at the same table and is dealt the same hand. Bets are open for 15 seconds; then two cards go to the hand and two to the dealer, one of them face down.
Nobody deals: "live" is the table. Each round has its own six-deck shoe, shuffled from a seed whose hash is shown before a bet is taken.
You play the hand for yourself, a turn at a time: hit, stand, or on the first two cards double. A turn is 9 seconds; if you do not answer, you stand. An answer cannot be changed.
If you stand, you keep the cards the hand had when you stood. The hand goes on for the players who hit, so the table may show more cards than you hold.
A double is a second stake the size of your first: you take exactly one more card and stand.
The dealer stands on every 17 and checks for blackjack on an ace or a ten: a dealer blackjack ends the round before anyone plays. Blackjack pays 3:2 and pushes against a dealer blackjack.
No split, no insurance and no surrender: the hand is everyone's, so it cannot be divided. That is why this table returns about half a percent less than the one you play alone.