Every midnight the vault releases a single sealed sudoku. Solve it, and the digits of your finished grid form the combination that opens tomorrow's door. Miss a day and the chain breaks — streaks here are earned in steel.
REQUEST ACCESS →Vault operator: …
PROTOCOL 01
Grids are locked until 00:00 UTC sharp. No previews, no archives, no second chances. The clock is part of the puzzle.
PROTOCOL 02
Row three of today's solution is tomorrow's combination. Solve sloppily and you'll be locked out with everyone watching the streak board.
PROTOCOL 03
Unbroken streaks earn vault ranks: Brass at 7, Steel at 30, Titanium at 100. Four people hold Titanium. They do not chat.