Fair deals: how we shuffle, and how you can check
Every hand is shuffled by the computer's secure random number generator, and sealed before anybody sees a card. When the hand is over, you can check the seal yourself.
Try a hand nowHow we shuffle
Before each hand, the server shuffles a full Sheepshead deck with a cryptographic random number generator, the kind used to make passwords. Nobody picks the cards: not us, not the computer players, and not the other people at the table. Computer players see only what a person in their seat would see.
The seal
Before the deal, the server writes down the whole deck in order, adds a long random word, and makes a fingerprint of it with SHA-256. That fingerprint is the seal. Your browser gets it when the hand starts, before any card is played. Change even one card and the fingerprint comes out completely different.
When the hand ends, the server shows the deck and the random word. Press Check the seal under the result, and your own browser makes the fingerprint again and compares it with the one it got at the start. If they match, the cards were exactly the ones sealed before the deal.
Check it with any SHA-256 tool
The sealed text is the random word, a colon, and the 32 cards in dealing order with a
space between them, like 6f1c...:QC 9D AH .... Each seat's cards come in
turn, starting with the first seat at the table, and the blind's two cards come last.
Any SHA-256 calculator gives the same fingerprint.
Replays of your own hands (Hand history, Replay) show the seal too.