JOKR Mines: clear the grid, cash out any time

JOKR Mines is our own mines game on a 5×5 grid. You choose how many mines to hide, from 1 to 20, then reveal tiles one by one. Each safe tile raises the multiplier; hit a mine and the stake is lost; cash out at any time to lock the current multiplier. The mine layout is fixed before you start and committed by its hash, so a finished game can be recomputed.

How a game plays

1. Choose your stake and the number of mines (1 to 20).
2. Reveal a tile. If it is safe, the multiplier rises; if it is a mine, the game ends.
3. Cash out whenever you like to win stake × current multiplier.

The maximum win is $600 per game. With more mines each safe pick is riskier and pays more; with fewer mines you can reveal more tiles for a slower climb.

The multiplier, in plain words

After k safe tiles the multiplier is 0.96 × the fair odds of making k safe picks in a row, rounded down to the cent. Fair odds are 1 divided by the probability of those picks, so the multiplier depends only on the number of mines and the number of safe tiles revealed, not on which tiles you chose. The 0.96 factor is the house share.

Verifying a game

When a game starts, the SHA-256 hash of the seed is shown. When the game ends, seed and salt are revealed and the verifier on the Fairness & RNG page recomputes the hash and the mine positions from the HMAC-SHA256 stream. Games played under the current rules have a salt beginning with "v2-".

Rules

• 5×5 grid with 1 to 20 mines. Each safe tile raises the multiplier; cash out at any time.
• Multiplier after k safe tiles = 0.96 × fair odds, rounded down to 0.01 (fair odds = 1 ÷ probability of k safe picks).
• Maximum win $600 per game.
• The mine layout comes from an HMAC-SHA256 stream of a seed committed by its SHA-256 hash when the game starts; seed and salt are revealed when the game ends.
• The salt of every game played under these rules starts with “v2-”; games whose salt has no such prefix used 0.9 instead of 0.96 in the multiplier.

Rakeback is paid on top of the game's payouts: 5 % to 15 % of the rake (3 % of each bet) depending on your JOKR tier and VIP level, plus temporary boosts added on top of that rate (see the Promotions page); the boosts are paused while a deposit bonus is active.

Rakeback and bonuses

Mines bets earn rakeback: 5% to 15% of the rake depending on your JOKR tier and VIP level, paid on top of the game return. Mines counts towards bonus wagering at the provably-fair rate on the Bonus Terms page. See the Promotions page for chests and rakeback, and the Originals page for the other five games; JOKR Crash uses the same commit-reveal scheme.