Mines is a 25-tile grid with 1 to 24 hidden mines. Open a safe tile and your multiplier grows; open a mine and the stake is gone. You can cash out after any safe tile. The tension is real, but the maths behind it is fixed and knowable.
How each tile is priced
After k safe tiles with m mines on the grid, the multiplier is the product of the odds of each step, discounted by the house edge:
multiplier = floor( floor( ∏ (25 − i) ÷ (25 − m − i) for i = 0..k−1 ) × (1 − edge) )
Both floors round down to two decimals. With the standard 1% edge:
| Mines | Safe tiles opened | Multiplier |
|---|---|---|
| 3 | 1 | 1.11× |
| 3 | 3 | 1.47× |
| 5 | 5 | 3.38× |
| 10 | 3 | 4.99× |
| 24 | 1 | 24.75× |
| 1 | 24 | 24.75× |
Two things stand out. First, 24 mines with one tile and 1 mine with all 24 tiles pay exactly the same, 24.75×, because the chance of surviving is the same (1 in 25) either way. Second, every step is priced at its true odds minus the edge, so cashing out early or late does not change what you should expect to earn per unit staked. It changes how much of your stake is at risk at any moment.
RTP
With 1% edge and the double rounding, RTP on a 3-mine, 3-tile play is about 98.4%; most common lines land between 98% and 99%. Long lines with many rounding steps drift a little lower, which is a small price and worth knowing.
Cash-out timing
Because expected return is flat, choose your cash-out point by variance:
- Few mines, many tiles: many small wins, occasional wipeouts.
- Many mines, few tiles: rare big wins, frequent losses.
A useful habit is to decide the tile count before you place the bet and stick to it. Deciding tile by tile in the moment is how a planned 1.47× turns into a lost stake. If all safe tiles are opened the round settles automatically.
The demo versus real play
The browser demo (no login) uses the same odds but skips the rounding, so a demo multiplier can show a fraction above what a real round pays. The real number is always the one the game shows after login.
Limits and verification
Limits are per coin, visible after login, with a maximum profit cap per coin that applies to any big multiplier. Zero-amount rounds are allowed. Each grid is generated from the server seed, your client seed and the nonce; the hash is shown before the round and the seed after, so the mine layout can be recomputed.
Play it
Last verified by the Bethropic team on 2026-09-08. Play responsibly.