Provably fair, explained: how a committed seed protects the crowd

Provably fair is a promise with a receipt. Before a round starts, the house commits to a secret; after the round, it reveals the secret so anyone can check that the result followed

Provably fair, explained: how a committed seed protects the crowd

Provably fair is a promise with a receipt. Before a round starts, the house commits to a secret; after the round, it reveals the secret so anyone can check that the result followed from it and was not chosen later.

The three steps

1. Commit. The house picks a secret seed and publishes its hash. A hash is a fingerprint: it identifies the seed without revealing it, and no other seed produces the same fingerprint. 2. Play. Bets are placed. On IMPAKT the bets themselves are mixed into the result, so the outcome depends on what the crowd did, not only on what the house chose. 3. Reveal. After the result, the seed is published. Anyone can hash it and compare with the commitment, then recompute the result from the seed and the bets.

What it rules out

The house cannot change the outcome after seeing the bets, because the seed was fixed before them. A player cannot steer the outcome either, because the seed is unknown while bets are open.

What it does not promise

It does not change the odds. A fair roulette wheel still has a zero. What it promises is that the wheel was not loaded for this spin.

On IMPAKT

Every hand of blackjack and every roulette spin on the house channel shows its commitment on the picture while bets are open and the seed once the round is over. See live blackjack and live roulette.

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