Gamdom Mines: how it works, multipliers and odds

Gamdom Mines is a grid game in the Gamdom Originals range. The board is a 5×5 grid
of 25 tiles. Before the round you choose how many mines are hidden, anywhere from 1 to 24. Every tile
you open that is safe raises your multiplier. Open a mine and the round ends with the stake lost. You
can cash out after any safe tile.

Gamdom's help centre calls it "a high-stakes game of strategy and suspense", and the suspense part is
accurate: every click is a fresh decision about whether to take the money. The strategy part needs a
caveat. Where the mines sit is fixed by the provably fair result before you click, so the choices that
matter are the mine count and when to stop, not which tile you pick.

Gamdom lists Mines among the Originals with an RTP of around 99%.

1. Set your stake. Originals start from about $0.01.
2. Choose the number of mines, from 1 to 24.
3. Press Bet to start the round.
4. Open tiles one at a time. Each safe tile shows a gem and raises the multiplier on the cash-out

button.

1. Cash out whenever you like, or keep going. A mine ends the round and loses the stake.

When the round ends, the board is revealed so you can see where every mine was. That is a display of
the outcome, not a hint about the next board.

The multiplier after each safe tile is the inverse of the chance of getting that far, less the edge.
With m mines on 25 tiles, the chance that the first tile is safe is (25 − m) ÷ 25. The second is
(24 − m) ÷ 24, and so on. Multiply them to get the chance of surviving k tiles, then divide 0.99 by it
for a rough multiplier at a 99% return.

These figures are calculated from the grid, not copied from the game; Gamdom's cash-out button shows
the exact multiplier at each step.

Two things stand out. First, a single tile with 24 mines pays about the same as many tiles with fewer
mines at the same survival chance; the game prices risk consistently. Second, chance times payout
stays near 0.99 at every step, so stopping early or going deep gives the same average return. What
changes is how often you win and how big the wins are.

Gamdom's help centre describes an Auto-Play mode that reveals a pre-chosen set of tiles automatically.
You pick the tiles and the mine count once, then set the number of rounds, stake changes after a win or
loss, and stop limits.

Auto-Play turns Mines from a decision game into a fast repeating bet, and the edge applies to every
round. If you use it, cap the number of rounds, set a stop-on-loss, and keep stake increases after
losses at zero unless you have worked out what a long losing run would cost. Our
Mines strategy guide covers sensible settings.

Picking corners, edges or "lucky" tiles

The mine positions come from the game hash before you click. Every unopened tile has the same chance
of being a mine, so where you click has no effect.

Learning from the revealed board

The reveal at the end shows where the mines were in that round. The next round uses the next hash and
a completely new layout.

One mine, many tiles

Low mine counts feel safe, but each tile pays very little. Twenty safe clicks on one mine still lose
to a single bad one.

Doubling after a loss

Raising the stake after a mine does not make the next board safer. It only raises the cost of the next
loss. See the glossary for why the house edge applies per bet.

Gamdom does not run Mines on per-player seed pairs. Like its other Originals, it uses a chain of ten
million SHA-256 hashes created from a secret seed, publishes the final hash, and plays the chain in
reverse. Each finished game's hash is published, and hashing it once must give the hash of the game
before.

For Mines, Gamdom links sample code that converts a game hash into the mine layout. Copy the hash from
your bet details, run the code with your mine count, and compare the layout with the board you saw.
The provably fair guide walks through it.

• Choose a target before you start, such as "cash out at 2x", and stick to it.
• Size the stake for the mine count. High mine counts lose most rounds; budget for that.
• Watch total wagered, not just the balance. Quick rounds add up.
• Treat rewards as a rebate. Gamdom rakeback gives part of the edge back; it does

not make Mines profitable.

For a break, Gamdom offers self-exclusion for 1, 5 or 8 days and longer closures through support; the
responsible gambling guide lists outside help too.