Provably fair Plinko verifier

Recompute any Plinko round from the revealed server seed, your client seed and the nonce. House edge: ~1–2% (paytable).

One float per row decides left or right (float ≥ 0.5 = right). With 8–16 rows the ball lands in bucket k, where k counts the rights — a binomial walk you can replay step by step.

Risk level only changes the paytable per bucket, never the path — the same seeds always produce the same L/R sequence.

Odds and payouts

Center buckets are most likely (binomial distribution); edge buckets pay the big multipliers. The verifier shows the exact path and bucket.

How to verify a plinko round yourself

  1. Rotate or end the seed pair in your account so the casino reveals the server seed it committed to. Until that happens the hash is a promise, not a proof.
  2. Copy the revealed server seed, your client seed and the nonce of the round you want to check — the nonce is the round counter, not a timestamp.
  3. Paste all three into the verifier above. It recomputes the HMAC chain and derives the plinko outcome the same way the operator's server did.
  4. Compare the result with what your bet history shows. A mismatch on any single round is the only evidence of tampering that actually means something.
  5. Check the committed hash too: hash the revealed server seed and confirm it equals the hash the casino published before you played.

Verification proves the result was not changed after you bet. It does not make plinko profitable — the ~1–2% (paytable) house edge is applied openly, in the payout table, and it is unaffected by any of this.

Frequently asked

Do I verify per ball or per round?

Per ball — each drop consumes its own nonce, so a 10-ball drop is verified with ten consecutive nonces.

Other verifiers