Before your round started, the game locked in the exact board — every treasure and
the mine — using a secret code, and showed you only a scrambled fingerprint of that
code (a hash). It couldn't swap the code afterward based on how you played. Once your
round ended, the real code was revealed.
Your device just checked, on its own, that the revealed code matches the fingerprint
you were shown beforehand, and that it produces the exact board you played — both ✓
below. That check ran right here in your browser, not on our servers, so it isn't
something you have to take on trust. The raw codes are below too, if you'd like to
verify them yourself with your own tools.