The basic fairness chain
A typical system combines a server seed, a player or client seed and a nonce. The casino commits to the server input before the bet, then reveals enough information later for the player to reproduce the result.
The commitment matters because it prevents the operator from choosing a convenient server seed after seeing the player’s bet. The verification tool should make that chain understandable rather than merely displaying a green tick.
What we inspect on Duel
We check whether the relevant Original exposes the necessary seeds, hash and nonce, whether the published calculation reproduces the displayed result and whether a player can rotate inputs without hidden friction.
A fairness system can be technically correct but poorly explained. Our review treats usability as part of the evidence because an unverifiable verification flow offers little protection to an ordinary user.
Fair does not mean zero edge
Provably fair and zero edge answer different questions. Fairness asks whether the result was generated as promised. RTP asks what the paytable returns in expectation over time.
A game can be provably fair while carrying a substantial house edge. Conversely, a 100% RTP claim still needs a trustworthy outcome mechanism. Duel’s proposition is strongest where both claims can be shown together.
Questions players ask
What does provably fair mean?+
It means a player can use disclosed cryptographic inputs to verify that a game result followed the committed process.
Does provably fair mean I cannot lose?+
No. It verifies outcome generation, not whether a particular bet wins or whether the game has a house edge.
Are all casino games on Duel provably fair?+
The relevant check applies to supported games and systems. Third-party titles can use different certification and fairness models.