> ## Documentation Index
> Fetch the complete documentation index at: https://docs.hoodshot.games/llms.txt
> Use this file to discover all available pages before exploring further.

# Coin Flip: Pick a Side, Win 1.9x

> Heads or tails at exactly 50%. A win pays 1.9x your stake. The side is decided by one bit of the house signature.

The simplest game in the house. Pick heads or tails, stake, flip.

<img src="https://mintcdn.com/hood-shot/fKdfI1DUtYgcna3K/images/coinflip.jpg?fit=max&auto=format&n=fKdfI1DUtYgcna3K&q=85&s=839deac243f0200ac593c0f91e05f423" alt="Coin Flip" width="1400" height="971" data-path="images/coinflip.jpg" />

| Result     | Probability | Pays           |
| ---------- | ----------- | -------------- |
| Your side  | 50%         | **1.9x** stake |
| Other side | 50%         | 0              |

The probability is exactly one half: the outcome is the lowest bit of `H`, the keccak256 hash of the house signature over your bet, and that bit cannot be steered by you or the house.

## How a round plays

1. Choose heads or tails and your stake.
2. Confirm the transaction. Your pick, stake, and address are hashed into a digest the moment it lands.
3. The house signs the digest. The coin animation replays what the signature already decided.
4. A win pays 1.9x to your wallet, automatically within seconds, or instantly if you press Collect.

Want proof the flip was straight? [Verify any bet](/concepts/verify-a-bet).