Mines at BC.Game

What BC.Game states about Mines

Mines is a 25-tile BC Original: choose 1 to 24 mines, reveal tiles, cash out when you like. As with BC.Game's other Originals, the price depends on which document you ask.

The maximum win is a multiplier, a million times the stake, and not a dollar amount. What that is worth in money depends on the stake the bet panel accepts.

The multiplier, step by step

With m mines, the chance that k picks are all safe is C(25 − m, k) / C(25, k). The game client on 1 Nov 2026 set the multiplier to 0.98 divided by that chance, capped at 1,000,000. So the return is 98% wherever you cash out, until the cap is reached.

Arithmetic from the multiplier rule in BC.Game's Mines game client (1 Nov 2026): 0.98 × C(25, k) / C(25 − m, k).

The first pick with one mine is the quickest check on the price. It succeeds 24 times in 25. At 98% the game pays 1.0208x for it; a 99% game would pay 1.0312x and a 96% game exactly 1.00x. The help article's own example, "a bet with 1 Mine and a 1.03X Multiplier", is the 99% figure, so that example predates the current price.

Where the million-times cap bites

Uncapped, the formula would reach its largest value at 12 mines and 13 safe picks: 0.98 × C(25, 13) = 5,096,294x. The 1,000,000x cap cuts that off, and every step that would pay more than the cap is worth less than 98%.

Arithmetic from the same multiplier rule with the 1,000,000x maximum in BC.Game's game data (13 Nov 2026).

With seven mines or fewer the cap is never reached. With eight or more, the last few tiles of a long run are sold at a discount to the house: at 10 mines, clearing all 15 safe tiles should pay 3.2 million times the stake and pays one million, a 30.6% return for that step. Cashing out before the capped pick keeps the full 98%. These boards are cleared a few times in a million rounds, so the effect on a normal session is nil; it is a reason not to chase the very last tile.

How the board is derived

BC.Game does not draw mine positions one at a time. Its fairness text and verifier shuffle a fixed list instead:

1. hash = HMAC-SHA256 with the server seed as key and clientSeed:nonce as message.
2. Start from the fixed order 7, 2, 19, 25, 1, 13, 5, 24, 14, 6, 15, 9, 22, 16, 3, 17, 18, 20, 8, 21, 4, 12, 10, 23, 11.
3. Take SHA-256 of the hash. Give the first tile that value, the second tile the same value rotated by one character, and so on; sort the tiles by these strings.
4. Hash once more with SHA-256 and repeat the sort on the new order.
5. The first m tiles of the final order are the mines.

The help centre shows the last step with two worked bets: with one mine "the final result is marked as 16. Therefore, the 16th tile on my game is a MINE", and with ten mines the tiles "7, 18, 25, 12, 6, 2, 9, 20, 21, 10" are the mines. The whole board is therefore fixed by the seeds and the nonce before the first click, and the order in which you click cannot change where the mines are.

To check a round, the help centre's route is: the seed icon, "Use New Seeds", then My Bets, the bet, and Verify, which opens the verifier with the revealed seeds filled in. Our Mines verifier has a BC.Game mode that runs the same two-pass ordering and prints all 25 tiles; with m mines, compare its first m numbers with the mines on your board, and use the SHA-256 check to confirm the server seed matches the hash you were shown.

Same price, very different rides

Since every cash-out point below the cap returns 98%, what you are choosing with the mine count and the cash-out step is the spread of results. The table gives the standard deviation of one round's return, in units of the stake, for a few plans. A plan with a deviation of 4 swings twenty times as hard as one with 0.2 for the same expected cost.

Arithmetic from the multiplier rule above. Expected return is 98% for every row.

The 24-mine game is the extreme: one tile is safe, the pick succeeds 4% of the time and pays 24.5x. It is a 25-number roulette bet with a 2% edge. The one-mine, one-pick game is the other end, a 96% shot at 2 cents on the dollar.

The help centre's auto mode adds four switches: raise or reset the stake "on win", the same "on lose", and stop once total winnings or total losses reach a set amount. The two stop rules limit how long a session runs. The two stake rules reshape the distribution of session results, typically many small wins against a rare large loss when the stake rises after a loss, and leave the 2% untouched, since the board for each round comes from the seeds and the nonce and nothing else.

BC.Game Mines against Stake, Shuffle and Roobet

Stake, Shuffle and Roobet: each casino's documents as of 12 Nov 2026, detailed on the pages linked below. First-pick multipliers are arithmetic from each stated return.

BC.Game sits between the 99% games at Stake and Shuffle and Roobet's 96% one. Per $100 wagered the expected cost is about $2, against $1 and $4.

The choices, and what each one does

Number of mines. More mines means a lower chance per pick and a higher multiplier, in exact proportion. One mine pays 1.02x for a 96% shot; ten mines pay 1.63x for a 60% shot. The return is 98% in both.

When to cash out. Each extra pick is a new bet of your current balance in the round at the same 2% margin on the whole sequence; stopping early or late moves variance, not the average. The only exception is the capped tail described above.

Which tile. No effect. Every unrevealed tile is equally likely to hold a mine, and predictor tools cannot see a server seed that is shown only as a hash. The Mines predictor page covers that claim, and the Mines calculator gives the chance and multiplier for any setup. Account terms are in the BC.Game review.

Sources: BC.Game help centre, How to Play Mines and House Edge/RTP (13 Nov 2026); game data on bc.game (13 Nov 2026); Mines fairness text, info panel and game client on bc.game (1 Nov 2026); BC.Game Mines verifier (13 Nov 2026). Chances, multipliers and returns are our arithmetic.

Frequently asked questions

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