How to play Coin Flip
Call it
Pick heads or tails and set your stake. Each flip is 50/50.
Climb the ladder
A right call takes you up a step: 1.8x, then 3.6x, 7.2x and so on. A wrong call loses the stake.
Cash out
Take the ladder whenever you like, or let auto cash-out take it at the step you set (two right calls by default).
New to it? Practice mode uses free chips, not Diamonds, with the same odds and tables.
The Coin Flip ladder
| Right calls in a row | Multiplier | Chance |
|---|---|---|
| 1 | 1.8x | 50% |
| 2 | 3.6x | 25% |
| 3 | 7.2x | 12.5% |
| 4 | 14.4x | 6.25% |
| 5 | 28.8x | 3.13% |
| 6 | 57.6x | 1.56% |
| 7 | 115.2x | 0.78% |
| 8 | 230.4x | 0.39% |
| 9 | 460.8x | 0.2% |
| 10 | 921.6x | 0.098% |
Each step is the fair odds, 2x per call, times 0.9, so wherever you stop Coin Flip returns 90% (house edge 10%). The ladder ends at 10 right calls and cashes out there by itself.
Flip against a friend
Friends who follow each other can challenge one another to a coin flip duel for a matched stake, settled with both players’ seeds. The house keeps a small fee from the pot. See Invite friends.
Limits
One round can pay at most 250,000 Diamonds, and no multiplier goes past 1,000x. Members can stake up to 5,000 Diamonds a round, and a VIP pass raises that. Your daily loss limit covers every game.
How to verify a Coin Flip result
A game’s 20 flips are fixed when it starts, one number each: below 0.5 is heads, otherwise tails. The numbers come from your seeds: f = the first 52 bits of HMAC-SHA256(server seed, “client seed:nonce”) ÷ 2^52, and each extra number adds “:1”, “:2” and so on to the message.
Before you bet
You see the SHA-256 hash of your server seed, which fixes it. Set your own client seed whenever you like.
Reveal the seed
Rotate your seed pair on the Fairness page. The old server seed is revealed and a new pair starts.
Recompute
Check that the seed hashes to what you saw, then paste it into the game’s verify panel, or any HMAC-SHA256 tool, to get the same result.
More on the method: Provably fair and What provably fair means.
Frequently asked questions
Is each flip really 50/50?
Yes. The house edge is in the payout instead: a right call pays 1.8x, not 2x.
When should I cash out?
Whenever you like: the return is 90% wherever you stop. Going further pays more but wins less often, so decide your step before you start.
Can the coin know my call?
No. The flips are fixed from your seeds before you call, and you saw the hash of your server seed before you bet.
More games like this
Hi-Lo
Guess whether the next card is higher, lower or the same, and cash out between guesses.
Tower
Climb a tower one row at a time. Each safe tile raises the multiplier; cash out whenever you like.
Dice
Pick a target and roll over or under it. The lower the chance, the higher the multiplier.
Every game is on Casino games. New to the words? The glossary explains RTP, house edge, seeds and nonces.
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