RANGEBLENDS · ADDRESSED RANDOMNESS
A world is the word that made it. A save is a seed and what the player did. Nothing in between is
generated or kept, because every value is addressed by where it belongs rather than drawn from a stream —
so roll("loot", 4912, 20) costs exactly what index 1 costs, and gives the same answer on every
machine, forever.
Four ways of answering are on offer here. Three of them are good. One is kept because it can be seen to fail, and that is the most useful thing on this page.
Each house asks the law for its walls, roof, door and lamps, keyed by its own column. No table, no noise field, no seed stream to keep in step. Change the word and the village changes; change the backend and you change what is doing the answering.
Ask each backend the same question four thousand times — one house after another, eight choices each — and count what comes back. An even spread means a village of mixed roofs. An uneven one means a village that looks copied.
This runs when you press it, here, now. The bars are the eight counts.
| backend | distinct | lowest | highest | spread | the eight counts |
|---|
Press the button and it will count.
The same law does provably fair play. The house commits to a secret before anything happens and publishes only its fingerprint. The player adds a word of their own. Every roll is then a pure function of both — so the house cannot steer it, and the player cannot predict it.
Afterwards the secret is revealed and anyone recomputes the whole session. Alter a single roll in the record and the check fails.
Press Commit, play, reveal.
The card is plain about the limits, and so is this page. qrand takes the Legendre symbol
modulo the Mersenne prime 2^61 − 1; character sums are bounded, so it cannot have long-range
correlation — but the modulus is public, so it is not for anything an adversary profits from. gamerng is
fine for loot and terrain and no further. The keyed blake2b backend is the default because it is the one that
holds up when someone is trying.
And edge stays in the list on purpose. A kit that only ships the things that work teaches you nothing about how to tell. Run the bench and watch it come apart: that is the point of keeping it.