Verify the seal
A sealed card commits its answer — the culprit, the hidden fleet, the escape code, the word — as a SHA-256 hash before you play. After the reveal, paste it here. Your browser recomputes the hash and, if it matches, the seal turns green: proof the answer was fixed in advance. Nothing is sent anywhere.
VerifierPaste a reveal and its commitment, then check the seal.
Audit a dice tape
Dice games are forbidden to invent a roll — they read a published d20 tape generated from
a fixed seed ({game}:{version}). That makes a fudged number
catchable: regenerate the tape here, in your browser, and compare it to the rolls your game
master showed. The opening card prints the first 40 values and the game's SYSTEM file prints
the whole tape — one sequence, so yours must line up from position 1. Check a single position
too — if your game master shows tape#14=17, this confirms it. Nothing is sent
anywhere.