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How it worksWhat it paysRTPTest vectorsVerify

Provably Fair

  • How it works
  • What it pays
  • RTP
  • Test vectors
  • Verify
Provably FairMines

Mines

Twenty-four numbers from your seeds shuffle the 25 tiles, and the first tiles of the shuffle hold the mines. The whole board is fixed the moment you bet, before you reveal anything.

RTP
99%
Max win
5.15M×
Verify a Mines roundPlay Mines
How it works

How a Mines result is made.

  1. 1

    Commit

    We choose our server seed before you bet and show its fingerprint. This commits us to that seed.

  2. 2

    The draw

    Your seeds shuffle the 25 tiles and place the mines. The board is fixed before you reveal any tile.

  3. 3

    Reveal

    Rotate your seed to reveal ours. Use both seeds and the bet number to recheck any past result.

The whole formula

result = HMAC-SHA256(serverSeed, clientSeed:nonce:round)

  • serverSeedOur seed, sealed until you rotate
  • clientSeedYour seed
  • nonceBet number, +1 each bet
  • roundExtra numbers, for games that need more
mines.tsTypeScript
1export function computeMinePositionsFromFloats(floats: number[], mineCount: number): number[] {
2  const tiles = Array.from({ length: MINES_GRID_SIZE }, (_, index) => index);
3  let floatIndex = 0;
4 
5  for (let index = MINES_GRID_SIZE - 1; index > 0; index -= 1) {
6    const float = floats[floatIndex] ?? 0;
What it pays

Every outcome and what it pays.

Mines

on a board of 25 tiles

1 mine
Safe tiles revealedChance to get therePays
196.00%1.03×
292.00%1.08×
388.00%1.13×
484.00%1.18×
580.00%1.24×
676.00%1.3×
772.00%1.38×
868.00%1.46×
964.00%1.55×
1060.00%1.65×
1156.00%1.77×
1252.00%1.9×
1348.00%2.06×
1444.00%2.25×
1540.00%2.48×
1636.00%2.75×
1732.00%3.09×
1828.00%3.54×
1924.00%4.13×
2020.00%4.95×
2116.00%6.19×
2212.00%8.25×
238.00%12.38×
244.00%24.75×
RTP

Return to player.

Theoretical RTP: 99%.

  1. With m mines, the chance that r reveals are all safe is:

    P = C(25 − m, r) / C(25, r)
  2. Cashing out after r safe reveals pays:

    multiplier = 0.99 × C(25, r) / C(25 − m, r)
Test vectors

Fixed inputs, known results.

Reproduce these results with the inputs below.

Verify

Check a Mines round.

Find it in your bet history or on any bet slip

What we check

  1. 01Our seed matches its fingerprint
  2. 02Your seed is mixed in
  3. 03Numbers are drawn
  4. 04Numbers become the result
  5. 05The result matches your bet

Everything is calculated in your browser.

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