Keno

Pick up to 10 numbers from 1 to 40. Each round draws 10 numbers, and the more of your picks are drawn, the more you win.

How To Play

1. Set your bet with − and +, halve or double it with ½ and 2x, type an amount, or pick one from the list. Bets range from $0.10 to $100.00.
2. Pick 1 to 10 numbers on the board; tap a number again to unpick it. Auto Pick picks 10 random numbers in place of yours, and Clear (beside PnL) removes all your picks.
3. Choose the Risk: Low, Medium or High. Higher risk pays more for the most hits and less, or nothing, for a few.
4. Press Play. Your bet is taken and the 10 numbers are drawn one by one.

Winning

• A drawn number you picked is a hit, shown with an emerald. The row under the board shows what each number of hits pays for your risk and number of picks.
• Your win is added to your balance once the draw is complete.
• Every draw is decided when you play; the reveal only shows it.
• Your picks, bet and risk can't change during a round.

Example: $2.00 at Medium risk with 4 picks. Three hits pay 9.8x, winning $19.60.

Auto Play

• Pick your numbers, press Auto Play, choose how many rounds to play (5 to 1,000, or ∞) and a speed. Every round plays the same picks, bet and risk. Slow and medium reveal each draw; fast shows each result at once.
• Press Stop Auto at any time; the round in play still finishes. Auto play also stops if your balance is lower than your bet.

Settings

• The lightning button at the top turns on fast mode: Play reveals all 10 numbers at once instead of one by one.
• Round History shows your last 50 rounds. Select the details icon to see a round in full.
• Provably Fair shows the seeds every draw comes from, so you can check that no draw was changed after you bet.
• Disable Animations shows results instantly.
• Space To Bet lets you press Space to play a round.

Return To Player

The theoretical return to player (RTP) is 97.88% to 98.08%, depending on the risk and number of picks. Wins are rounded to the nearest cent.

The maximum win multiplier is 1,000x, with 9 or 10 picks.

Closing the game ends your session.

Malfunction voids all pays and plays.

Provably Fair

Every draw comes from seeds that are fixed before you bet. The server shows you a hash of its seed up front and reveals the seed itself when you rotate, so you can check that no draw was changed after you played.

Active Seeds

Reveal & Rotate Seeds

Rotating reveals the server seed above, then uses the next one with your client seed. Closing the game deletes its seeds, so reveal them before you leave.

Revealed Seeds

None yet.

How To Check A Round

1. The SHA-256 hash of the revealed server seed must match the hash shown before you bet.
2. Work out HMAC-SHA256, keyed with the server seed, of client seed:nonce:0, then :1, :2 and so on as more bytes are needed. The nonce is the round's number with those seeds, starting at 0.
3. Read the bytes 4 at a time as whole numbers (big-endian, 0 to 2³² − 1).
4. Shuffle the numbers 1 to 40 (Fisher–Yates): for each position i from 39 down to 1 (counting from 0), take the next number that's below the largest multiple of i + 1 that fits in 2³², divide it by i + 1, and swap positions i and the remainder.
5. The first 10 numbers of the shuffled list are the draw, in the order they're revealed. Your picks and risk don't change the draw, only what it pays.

Each round's details show its seeds and nonce, and the game checks every round for you once its seed is revealed.