How Keno Works — Picks, Risk Levels, and Fair Draws
Learn how Keno works on VFairGames — 1–40 board, pick 1–10, 10-number draw, Classic to High risk paytables, and HMAC-SHA256 verification.
How Keno works on VFairGames is lottery-style and fast: you pick 1–10 numbers on a 1–40 board, the house draws 10 numbers, and your payout follows the paytable for how many of your picks hit — shaped by Classic, Low, Medium, or High risk.
This guide covers the play loop on VFairGames Keno, what risk actually changes, how Auto Pick and Auto bet fit in, and how HMAC-SHA256 lets anyone re-check a draw.
How Keno play works
On Keno, each round looks like this:
- Set the bet amount.
- Choose risk — Classic, Low, Medium, or High (default Classic).
- Select 1–10 numbers on the board — or use Auto Pick to fill a full 10-spot card in one tap.
- Place the bet — 10 numbers are drawn from 1–40.
- Count hits (how many of your picks appear in the draw). Payout is stake × paytable[hits] for your pick count and risk.
Hit chances come from hypergeometric math (picks vs a 10-from-40 draw). Risk does not change those chances — only the multipliers for each hit count.
Auto can run a streak of bets with the same card (including infinite count), with optional stop-on-profit / stop-on-loss and on-win / on-loss stake adjust. Instant Bet speeds reveal and auto pacing; it does not change the draw or paytable.
Browse the full games catalogue for Dice, Mines, Limbo, Plinko, and Keno.
Classic, Low, Medium, and High risk
| Risk | What it changes | What stays the same |
|---|---|---|
| Classic / Low | Steadier mid/low-hit payouts; lower top ends on many pick counts | Draw size, board, hit odds |
| Medium / High | More payout stacked into rare high-hit rows (tops can reach 1,000× on some full-hit rows) | Draw size, board, hit odds |
Picking more numbers does not automatically pay more. It can unlock higher top-end paytable rows when you hit most of them, but matching a larger set is harder. Always read the table for your pick count + risk.
Keno on VFairGames uses fixed paytables (theoretical expected return near ~99% depending on setup). Partner RTP is not a slider that rebuilds Keno odds the way Dice, Mines, or Limbo use configurable RTP.
How to verify a Keno draw
Like the rest of the VFairGames catalogue, Keno uses HMAC-SHA256 commit–reveal:
- Before play under a seed, players see a server seed hash.
- The draw is built from HMAC over the server seed with
clientSeed:nonce:cursor(a Fisher–Yates-style shuffle of 1–40; the first 10 numbers are the draw). - After reveal, anyone can recompute the drawn set and match bet history.
Independent re-check: verify.vfair.games. Concept overview: What is provably fair?.
What verification proves: this drawn set came from the committed seeds. What it does not prove: that your risk level was “best,” that the wallet paid, or that Auto Pick was random in a cryptographic sense (Auto Pick is a client convenience; the draw is what fairness locks).
Why operators ship Keno
For online casinos, crypto casinos, white-label platforms, and agencies, Keno is a strong originals pick because:
- Players already know lottery-style “pick numbers / match the draw.”
- Risk × pick count gives a clear volatility dial without a live climb or grid cash-out.
- Sessions stay short and readable for support.
- Fairness UI plus a public verifier turn disputes into “here are the seeds; recompute the draw.”
Try it and verify a round
- Open Keno and place a bet (demo-friendly for evaluation).
- Note fairness inputs (server seed hash, client seed, nonce) plus your picks and risk.
- After seed reveal, re-check the drawn numbers in verify.vfair.games or the in-game fairness flow.
Evaluating VFairGames for your casino or platform? Email info@vfair.games.
FAQ
How does Keno work in one sentence?
You pick 1–10 numbers on a 1–40 board, ten numbers are drawn from HMAC-SHA256 seeds, and you get paid from the risk paytable based on how many of your picks hit.
Does higher risk mean you hit less often?
No. Risk only changes multipliers. Hit chances stay the same for the same pick count.
What does Auto Pick do?
It fills a 10-number card with client-side random picks for convenience. It is not part of the HMAC commitment — the draw is.
How do I verify a Keno round on VFairGames?
Confirm the revealed server seed hashes to the pre-play commitment, recompute the HMAC draw, and compare the ten numbers to bet history — in-game or at verify.vfair.games.