What Stake publishes about Mines
Mines is a Stake Original played on a fixed 5 by 5 grid. You choose how many of the 25 tiles hide a mine, from 1 to 24, and every safe tile you open raises a multiplier that you can bank at any point. The game page shows an RTP badge of 99.00% (1 Nov 2026), and Stake's fairness documentation describes the board in one line: "A mine game is generated with 24 separate game events, in the form of mines on the board".
| Item | What Stake states | Where |
|---|---|---|
| Grid | 25 tiles, positions counted "from left to right, top to bottom" | Fairness documentation, "Game events" (1 Nov 2026) |
| Mines per round | 1 to 24, chosen before the round | Game page and calculation page (1 Nov 2026) |
| RTP | 99.00% | RTP badge on the Mines game page (1 Nov 2026) |
| Multiplier rule | 0.99 times the fair odds of the picks made so far | Multiplier function in the Mines game (1 Nov 2026) |
| Highest multiplier | 5,148,297x, a full clear with 12 or 13 mines | Arithmetic from the multiplier rule |
| Minimum bet | $0.0001 or the equivalent | Help centre, "Crypto: Casino Betting Limits" (12 Nov 2026) |
| Maximum bet and profit | Per coin for all Stake Originals, e.g. 25,000,000 USDT bet and 2,500,000 USDT profit | Same help-centre article (12 Nov 2026) |
| Fairness | HMAC-SHA256, three cursor rounds per board, Fisher-Yates draw without repeats | Fairness documentation, "Implementation" and "Conversions" (1 Nov 2026) |
The multiplier rule, written out
Stake's multiplier for a board with m mines after k safe picks is 99% of the reciprocal of the chance of making those picks. Each pick multiplies the running figure by the tiles left divided by the safe tiles left:
multiplier(m, k) = 0.99 × 25/(25−m) × 24/(24−m) × … × (25−k+1)/(25−m−k+1)
= 0.99 × C(25, k) / C(25−m, k)
The chance of surviving k picks is C(25−m, k) / C(25, k), exactly the reciprocal of the second factor. Multiply the two and 0.99 is all that remains. That is why the 99% holds at every mine count and every cash-out point: there is no combination of mines and picks where the product is anything else. The figures on this page are the unrounded formula values; the game displays them rounded, so a displayed step can differ in the last digit.
Three mines, pick by pick
| Safe picks | Multiplier | Chance of getting this far | Multiplier times chance |
|---|---|---|---|
| 1 | 1.1250x | 88.00% | 99.00% |
| 2 | 1.2857x | 77.00% | 99.00% |
| 3 | 1.4786x | 66.96% | 99.00% |
| 4 | 1.7120x | 57.83% | 99.00% |
| 5 | 1.9974x | 49.57% | 99.00% |
| 6 | 2.3498x | 42.13% | 99.00% |
| 7 | 2.7904x | 35.48% | 99.00% |
| 8 | 3.3485x | 29.57% | 99.00% |
| 9 | 4.0661x | 24.35% | 99.00% |
| 10 | 5.0044x | 19.78% | 99.00% |
Arithmetic from the multiplier rule. The last column is the expected return of cashing out at that step; it is 99% on every row.
With three mines the fifth safe pick is the first to reach roughly 2x (1.9974x), and you get that far just under half the time. Stopping earlier or later moves the size and frequency of wins and leaves the 1% cost per unit wagered where it was.
Every mine count at a glance
| Mines | Safe tiles | First pick safe | After 1 pick | After 3 picks | After 5 picks | All safe tiles cleared | Chance of a full clear |
|---|---|---|---|---|---|---|---|
| 1 | 24 | 96% | 1.0312x | 1.1250x | 1.2375x | 24.75x | 1 in 25 |
| 3 | 22 | 88% | 1.1250x | 1.4786x | 1.9974x | 2,277.00x | 1 in 2,300 |
| 5 | 20 | 80% | 1.2375x | 1.9974x | 3.3926x | 52,598.70x | 1 in 53,130 |
| 10 | 15 | 60% | 1.6500x | 5.0044x | 17.5154x | 3,236,072.40x | 1 in 3,268,760 |
| 15 | 10 | 40% | 2.4750x | 18.9750x | 208.7250x | 3,236,072.40x | 1 in 3,268,760 |
| 20 | 5 | 20% | 4.9500x | 227.7000x | 52598.7000x | 52,598.70x | 1 in 53,130 |
| 24 | 1 | 4% | 24.7500x | n/a | n/a | 24.75x | 1 in 25 |
Arithmetic from the multiplier rule, unrounded.
The largest figure the formula can produce is at 12 mines with all 13 safe tiles opened, or 13 mines with all 12: 0.99 times C(25, 13) = 0.99 × 5,200,300 = 5,148,297x. The chance is 1 in 5,200,300 per attempt. With one mine the full clear pays 24.75x and with 24 mines the single safe tile pays the same 24.75x at a 4% chance; the two ends of the range are mirror images.
Profit cap: where the ladder stops paying
Stake's help centre caps the profit of a single bet on any Stake Original by coin. On Mines this matters at the far end of the ladder, where multipliers pass the cap divided by your stake. For the 5,148,297x full clear the largest stake that the cap still covers is small:
| Coin | Max bet | Max profit per bet | Largest stake whose full clear fits the cap |
|---|---|---|---|
| BTC | 100 | 20 | 0.000004 BTC |
| ETH | 1,000 | 700 | 0.000136 ETH |
| LTC | 100,000 | 10,000 | 0.001942 LTC |
| SOL | 100,000 | 20,000 | 0.003885 SOL |
| USDT | 25,000,000 | 2,500,000 | 0.485598 USDT |
| XRP | 1,000,000 | 250,000 | 0.04856 XRP |
| DOGE | 2,000,000 | 500,000 | 0.09712 DOGE |
Limits: Stake help centre, 12 Nov 2026. Last column is our arithmetic.
At more ordinary targets the cap is far away: a 25x cash-out in USDT stays inside the profit cap up to a stake of about 104,000 USDT. The help-centre article does not describe what happens to a round that would exceed the cap, so check the bet panel before staking near these amounts.
How the board is fixed before your first click
All mine positions are derived when the bet is placed. Your clicks choose which tiles to look at; they do not feed into the result. Stake's documentation gives the construction:
- HMAC-SHA256 is computed with the server seed as key and
clientSeed:nonce:cursoras message. Each 32-byte output gives eight numbers between 0 and 1 (four bytes each). - A board can need up to 24 numbers, so the cursor runs 0, 1 and 2. Stake lists Mines among the games with "3 increments per game for 24 possible bomb locations".
- The first number is multiplied by 25 and rounded down to pick a tile from the list 0 to 24. That tile is removed. The second number is multiplied by 24 and picks from the 24 tiles left, and so on. This is the Fisher-Yates draw Stake names for games "where outcomes cannot be duplicated".
- Only the first m picks are used, where m is your mine count. "Between 1 and 24 game event results are used, based on the settings chosen."
- Tile 0 is the top-left square and the count runs left to right, then down a row.
One consequence: if you replay the same seed pair and nonce with a different mine count, the first mines land on the same tiles. The mine count selects how many entries of one fixed sequence are used. Another: a pattern of clicks cannot be safer than any other, because the positions were drawn uniformly without reference to where you would click.
Checking a round takes the revealed server seed (available after you rotate the seed pair), your client seed, the nonce and the mine count:
- Commitment: SHA-256 of the revealed server seed must equal the hash Stake showed before the bets.
- Board on Stake: the calculation page under Provably Fair has a Mines entry for 1 to 24 mines and draws the mined tiles.
- Board outside Stake: our Stake seed checker and the Mines verifier run the same draw in your browser, list the mined tiles (numbered 1 to 25, left to right and top to bottom) and draw the board for the mine count you select.
A match shows the board was committed in advance. It says nothing about whether to open another tile; the multiplier already prices that decision at 99 cents on the dollar. More on what the method covers: what provably fair gambling proves and the general verifier.
Stake Mines against Shuffle, Roobet and Gamdom
| Stake | Shuffle | Roobet | Gamdom | |
|---|---|---|---|---|
| Grid | 25 tiles | 25 tiles | 25, 36, 49 or 64 tiles | 25 tiles |
| Mines | 1 to 24 | 1 to 24 | 1 up to one less than the grid size | 1 to 24 |
| Stated return | 99.00% RTP | 99% RTP "on every configuration" | 96% RTP, 4% house edge | 99% once the first $5,000 of daily Originals wagering is used |
| Top multiplier | 5,148,297x | 5,148,297x | Maximum payout stated as $3,000,000 | Not stated as a multiplier |
| Limits | Per coin; profit cap e.g. 2,500,000 USDT | $20,000 bet, $500,000 win | Shown in the bet panel | Shown in the bet panel |
| Mine placement | HMAC-SHA256 floats, Fisher-Yates draw | Same floats, its own skip loop | HMAC-SHA512 then HMAC-SHA256, Fisher-Yates shuffle | HMAC-SHA512, own verifier |
Shuffle: game page and help centre, 12 Nov 2026. Roobet: game page 1 Nov 2026, verifier 12 Nov 2026. Gamdom: game page and fairness page, 1 Nov 2026.
The gap that costs money is Roobet's. A 96% game takes four times as much per dollar wagered as a 99% one: $40 against $10 for every $1,000 put through. Shuffle prices Mines the same as Stake. Its documentation writes the mine draw as a loop that skips occupied tiles instead of removing them from a list, which picks the same tile at each step, so the same seeds give the same board on both sites.
Sources: Stake fairness documentation, implementation, conversions and game events (1 Nov 2026); Stake Mines game page (1 Nov 2026); Stake help centre, crypto betting limits and provable fairness (12 Nov 2026). Multipliers, chances and stake ceilings are our arithmetic from the multiplier rule and the published caps.
For a setting-by-setting expected loss use the Mines calculator. The same pick-and-cash-out structure with a 2% edge is covered on the Dragon Tower page, and Stake's licence, KYC and withdrawal terms are in the Stake review.