GAME GUIDE · PLINKO
How Plinko Works: Bucket Probability, Rows and 99% RTP
Prism Plinko now uses the server-authoritative Wallet runtime. Each row is a 50/50 left-or-right event, producing a binomial bucket distribution after n rows. Transaction Core fixes the complete L/R truth before presentation; animation only reveals it.
- RTP
- 99.00%
- Rows
- 8–16
- Path Model
- Binomial
- Runtime
- Server-authoritative
How to play
- Choose bet, Risk and Rows. Rows change the actual bucket probability distribution.
- DROP generates the complete L/R path and final bucket before timed animation starts.
- Each row contributes one left/right event; the number of right moves determines the final bucket.
- Risk does not change bucket probability. It only changes payout-table shape and variance.
Plinko production math
With n rows, bucket k has probability P(X=k)=C(n,k)/2^n. The canonical paytable is shaped by Risk so the probability-weighted payout target is Σ P(k)×M(k)=0.99, or 99% RTP.
| 16 rows · center | C(16,8)/2^16 | 19.638% |
| 16 rows · either edge | 2/2^16 | 0.003052% |
| RTP target | ΣP(k)M(k) | 99.00% |
Fairness and settlement
Transaction Core creates and settles Plinko rounds with server HMAC-SHA256, commitment/reveal, immutable round truth and Wallet/Ledger settlement. Ball motion, peg impacts and bucket highlights only reveal the server-decided path.
Frequently asked questions
Does Risk make edge buckets more likely?
No. Risk changes the payout table only. Bucket probability comes from Rows and the binomial distribution.
What changes when Rows increase?
The number of buckets and their probability distribution change; central buckets generally remain more common than the edges.
Can peg animation change the result?
No. The server L/R path is fixed before animation starts.
Is 99% the production RTP?
Yes. The canonical Plinko server contract uses 99% RTP; short sessions can still deviate sharply from the long-run expectation.