Fairness

Each Limbo launch is locked in when you press Play. It comes from the same three values as Mines:

• Client seed. Text you can read anytime. Type a new one, or leave the box empty and press Change client seed to get a random one.
• Server seed. A long random string kept on the server. It mixes letters, numbers, and symbols such as + and /. Until you change your client seed, you only see its SHA-256 hash.
• Nonce. A counter shared with Mines and Dice. It starts at 1 and goes up by one every time a Mines, Dice, or Limbo round starts.

Server seeds written in blue are still hashed. Change your client seed after any open Mines round is finished. The old server seed is then shown in the normal text color, and you can verify every Limbo launch that used it.

The launch joins the server seed, client seed, and nonce with hyphens, then hashes that with HMAC-SHA256. The first 13 characters of that hash are a 52-bit number. The result multiplier is 93 times 2 to the 52nd, divided by 2 to the 52nd minus that number, then divided by 100. It never goes below 1.00x or above 1,000,000x. You win when that result is at least your target. The 93 is the 7% edge: the chance of hitting a target is 93 divided by the target.

Open this code, replace the three values at the top with the finished launch, then press Run.